{"id":60435,"date":"2026-07-17T11:08:29","date_gmt":"2026-07-17T09:08:29","guid":{"rendered":"https:\/\/alertes-meteo.com\/?page_id=60435"},"modified":"2026-07-17T15:08:05","modified_gmt":"2026-07-17T13:08:05","slug":"cartes-meteo-en-france-observation-de-lhumidex","status":"publish","type":"page","link":"https:\/\/alertes-meteo.com\/index.php\/cartes-meteo\/cartes-meteo-en-france-observation-de-lhumidex\/","title":{"rendered":"Cartes M\u00e9t\u00e9o en France &#8211; Observation de l&rsquo;humidex"},"content":{"rendered":"<div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:1575px;margin-left: calc(-5% \/ 2 );margin-right: calc(-5% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-blend:overlay;--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:2.375%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:2.375%;--awb-width-medium:100%;--awb-spacing-right-medium:2.375%;--awb-spacing-left-medium:2.375%;--awb-width-small:100%;--awb-spacing-right-small:2.375%;--awb-spacing-left-small:2.375%;\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-1\"><h1 align=\"center\"><b>Comment lire une carte Observation de l&rsquo;humidex ? (actualis\u00e9es en temps r\u00e9el)<\/b><\/h1>\n<\/div><div style=\"text-align:center; margin:20px 0;\">\n  <button\n    type=\"button\"\n    onclick=\"window.location.href='https:\/\/alertes-meteo.com\/index.php\/cartes-meteo\/calculer-lindice-humidex-temperature-ressentie-avec-lhumidite\/';\"\n    style=\"padding:14px 28px; background:#1683c5; color:white; border:none; border-radius:8px; font-size:18px; font-weight:bold; cursor:pointer;\">\n    Calcul indice humidex\n  <\/button>\n<\/div><div style=\"text-align:center;\">\n  <img class=\"lazyload\" decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" data-orig-src=\"https:\/\/www.meteociel.fr\/cartes_obs\/humidex.png\" \n       style=\"max-width:100%; height:auto;\" \n         alt=\"Carte des Temp\u00e9ratures humidex\">\n<\/div><div class=\"humidex-bar-v2\">\n\n  <div class=\"humidex-zone zone-green\">\n    <strong>< 30<\/strong>\n    <span>Sensation<br>de bien-\u00eatre<\/span>\n  <\/div>\n\n  <div class=\"humidex-zone zone-yellow\">\n    <strong>30 - 35<\/strong>\n    <span>Petit inconfort<\/span>\n  <\/div>\n\n  <div class=\"humidex-zone zone-orange-light\">\n    <strong>35 - 40<\/strong>\n    <span>Un certain inconfort<\/span>\n  <\/div>\n\n  <div class=\"humidex-zone zone-orange\">\n    <strong>40 - 45<\/strong>\n    <span>Beaucoup d\u2019inconfort<br>\u00c9vitez les efforts<\/span>\n  <\/div>\n\n  <div class=\"humidex-zone zone-red\">\n    <strong>45 - 54<\/strong>\n    <span>Danger<\/span>\n  <\/div>\n\n  <div class=\"humidex-zone zone-dark-red\">\n    <strong>> 54<\/strong>\n    <span>Coup de chaleur imminent<\/span>\n  <\/div>\n\n<\/div>\n\n<style>\n.humidex-bar-v2 {\n  display: grid;\n  grid-template-columns: 1.1fr 1.3fr 1.5fr 1.9fr 0.8fr 2.3fr;\n  width: 100%;\n  max-width: 900px;\n  margin: 20px auto;\n  overflow: hidden;\n  border: 3px solid #ffffff;\n  box-sizing: border-box;\n  font-family: Arial, Helvetica, sans-serif;\n}\n\n.humidex-zone {\n  display: flex;\n  min-height: 80px;\n  padding: 8px;\n  box-sizing: border-box;\n  flex-direction: column;\n  justify-content: center;\n  border-right: 2px solid #ffffff;\n  color: #000000;\n  text-align: left;\n  line-height: 1.2;\n}\n\n.humidex-zone:last-child {\n  border-right: none;\n}\n\n.humidex-zone strong {\n  display: block;\n  margin-bottom: 4px;\n  font-size: 16px;\n}\n\n.humidex-zone span {\n  display: block;\n  font-size: 14px;\n}\n\n.zone-green {\n  background-color: #20f000;\n}\n\n.zone-yellow {\n  background-color: #fff500;\n}\n\n.zone-orange-light {\n  background-color: #ffb000;\n}\n\n.zone-orange {\n  background-color: #ff7500;\n}\n\n.zone-red {\n  background-color: #f00000;\n}\n\n.zone-dark-red {\n  color: #ffffff;\n  background-color: #a00000;\n}\n\n\/* Affichage adapt\u00e9 aux t\u00e9l\u00e9phones *\/\n@media (max-width: 700px) {\n  .humidex-bar-v2 {\n    display: block;\n    max-width: 450px;\n  }\n\n  .humidex-zone {\n    min-height: auto;\n    padding: 12px 15px;\n    border-right: none;\n    border-bottom: 2px solid #ffffff;\n  }\n\n  .humidex-zone:last-child {\n    border-bottom: none;\n  }\n\n  .humidex-zone span br {\n    display: none;\n  }\n}\n<\/style><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-8902396130105212\"\n     crossorigin=\"anonymous\"><\/script>\n<!-- bas de page -->\n<ins class=\"adsbygoogle\"\n     style=\"display:block\"\n     data-ad-client=\"ca-pub-8902396130105212\"\n     data-ad-slot=\"7724440717\"\n     data-ad-format=\"auto\"\n     data-full-width-responsive=\"true\"><\/ins>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><div class=\"fusion-text fusion-text-2\"><div class=\"relative font-sans text-base text-foreground selection:bg-super\/50 selection:text-foreground dark:selection:bg-super\/10 dark:selection:text-super\">\n<div class=\"min-w-0 break-words &#091;word-break:break-word&#093;\">\n<div id=\"markdown-content-0\" class=\"gap-y-md after:clear-both after:block after:content-&#091;''&#093;\" dir=\"auto\" lang=\"fr\">\n<div class=\"has-inline-images my-2 first:mt-0 &#091;&amp;:has(&#091;data-inline-type=image&#093;)+&amp;:has(&#091;data-inline-type=image&#093;)_&#091;data-inline-type=image&#093;&#093;:hidden &#091;&amp;:has(table)_&#091;data-inline-type=image&#093;&#093;:hidden\">\n<div>\n<div class=\"prose dark:prose-invert inline leading-relaxed break-words min-w-0 &#091;word-break:break-word&#093; &#091;&amp;_&gt;*:first-child&#093;:mt-0 &#091;&amp;_&gt;*:last-child&#093;:mb-0\" data-renderer=\"lm\">\n<h2 id=\"faq-sur-lhumidex\" class=\"font-editorial font-bold mb-2 mt-4 &#091;.has-inline-images_&amp;&#093;:clear-end text-lg first:mt-0 md:text-lg &#091;hr+&amp;&#093;:mt-4\">FAQ sur l\u2019humidex<\/h2>\n<h2 id=\"1-questce-que-lindice-humidex\" class=\"font-editorial font-bold mb-2 mt-4 &#091;.has-inline-images_&amp;&#093;:clear-end text-base first:mt-0\">1. Qu\u2019est\u2011ce que l\u2019indice humidex ?<\/h2>\n<p class=\"my-2 &#091;&amp;+p&#093;:mt-4 &#091;&amp;_strong:has(+br)&#093;:inline-block &#091;&amp;_strong:has(+br)&#093;:align-top\">L\u2019indice humidex est un indice m\u00e9t\u00e9orologique invent\u00e9 par les Canadiens pour exprimer l\u2019effet combin\u00e9 de la chaleur et de l\u2019humidit\u00e9 sur la sensation de temp\u00e9rature. Il ne s\u2019agit pas d\u2019une temp\u00e9rature mesur\u00e9e mais d\u2019une valeur calcul\u00e9e, sans unit\u00e9, qui traduit ce que \u00ab ressent \u00bb la majorit\u00e9 des personnes en conditions chaudes et humides.<\/p>\n<h2 id=\"2-comment-lhumidex-estil-calcul\" class=\"font-editorial font-bold mb-2 mt-4 &#091;.has-inline-images_&amp;&#093;:clear-end text-base first:mt-0\">2. Comment l\u2019humidex est\u2011il calcul\u00e9 ?<\/h2>\n<p class=\"my-2 &#091;&amp;+p&#093;:mt-4 &#091;&amp;_strong:has(+br)&#093;:inline-block &#091;&amp;_strong:has(+br)&#093;:align-top\">L\u2019humidex est calcul\u00e9 \u00e0 partir de la temp\u00e9rature de l\u2019air et d\u2019une mesure de l\u2019humidit\u00e9, en pratique le point de ros\u00e9e, via une formule math\u00e9matique qui traduit l\u2019exc\u00e8s de vapeur d\u2019eau en degr\u00e9s ressentis suppl\u00e9mentaires. Plus le point de ros\u00e9e et donc la teneur en eau de l\u2019air sont \u00e9lev\u00e9s \u00e0 temp\u00e9rature donn\u00e9e, plus la valeur d\u2019humidex augmente et signale une chaleur difficile \u00e0 supporter.<\/p>\n<h2 id=\"3-quelle-est-la-diffrence-entre-humidex-et-temprat\" class=\"font-editorial font-bold mb-2 mt-4 &#091;.has-inline-images_&amp;&#093;:clear-end text-base first:mt-0\">3. Quelle est la diff\u00e9rence entre humidex et temp\u00e9rature ressentie ?<\/h2>\n<p class=\"my-2 &#091;&amp;+p&#093;:mt-4 &#091;&amp;_strong:has(+br)&#093;:inline-block &#091;&amp;_strong:has(+br)&#093;:align-top\">L\u2019humidex est une forme particuli\u00e8re de \u00ab temp\u00e9rature ressentie \u00bb qui combine explicitement la temp\u00e9rature de l\u2019air et l\u2019humidit\u00e9 pour donner une valeur \u00e9quivalente en termes de confort. D\u2019autres indices de temp\u00e9rature ressentie existent, comme l\u2019indice de chaleur am\u00e9ricain ou des indices locaux, mais tous poursuivent le m\u00eame objectif : traduire la chaleur per\u00e7ue par le corps humain plut\u00f4t que la seule temp\u00e9rature mesur\u00e9e.<\/p>\n<h2 id=\"4--partir-de-quelle-valeur-lhumidex-devientil-inco\" class=\"font-editorial font-bold mb-2 mt-4 &#091;.has-inline-images_&amp;&#093;:clear-end text-base first:mt-0\">4. \u00c0 partir de quelle valeur l\u2019humidex devient\u2011il inconfortable ?<\/h2>\n<p class=\"my-2 &#091;&amp;+p&#093;:mt-4 &#091;&amp;_strong:has(+br)&#093;:inline-block &#091;&amp;_strong:has(+br)&#093;:align-top\">Un humidex inf\u00e9rieur \u00e0 30 correspond g\u00e9n\u00e9ralement \u00e0 des conditions confortables pour la plupart des personnes. Entre 30 et 39, on parle d\u2019inconfort mod\u00e9r\u00e9, entre 40 et 45 de fort inconfort avec recommandation d\u2019\u00e9viter les efforts, au\u2011del\u00e0 de 45 de conditions dangereuses, et au\u2011dessus de 54 un coup de chaleur est consid\u00e9r\u00e9 comme imminent.<\/p>\n<h2 id=\"5-pourquoi-lhumidit-rendelle-la-chaleur-plus-diffi\" class=\"font-editorial font-bold mb-2 mt-4 &#091;.has-inline-images_&amp;&#093;:clear-end text-base first:mt-0\">5. Pourquoi l\u2019humidit\u00e9 rend\u2011elle la chaleur plus difficile \u00e0 supporter ?<\/h2>\n<p class=\"my-2 &#091;&amp;+p&#093;:mt-4 &#091;&amp;_strong:has(+br)&#093;:inline-block &#091;&amp;_strong:has(+br)&#093;:align-top\">L\u2019humidit\u00e9 \u00e9lev\u00e9e limite l\u2019\u00e9vaporation de la transpiration, ce qui emp\u00eache le corps de se refroidir efficacement et augmente la sensation de chaleur et de lourdeur. \u00c0 temp\u00e9rature \u00e9gale, un air satur\u00e9 en vapeur d\u2019eau rend l\u2019atmosph\u00e8re beaucoup plus p\u00e9nible qu\u2019un air sec, d\u2019o\u00f9 l\u2019int\u00e9r\u00eat d\u2019un indice comme l\u2019humidex pour rendre visible cet effet.<\/p>\n<h2 id=\"6-quels-sont-les-risques-pour-la-sant-associs--un\" class=\"font-editorial font-bold mb-2 mt-4 &#091;.has-inline-images_&amp;&#093;:clear-end text-base first:mt-0\">6. Quels sont les risques pour la sant\u00e9 associ\u00e9s \u00e0 un humidex \u00e9lev\u00e9 ?<\/h2>\n<p class=\"my-2 &#091;&amp;+p&#093;:mt-4 &#091;&amp;_strong:has(+br)&#093;:inline-block &#091;&amp;_strong:has(+br)&#093;:align-top\">Un humidex \u00e9lev\u00e9 favorise l\u2019apparition de troubles li\u00e9s \u00e0 la chaleur comme les crampes, l\u2019\u00e9puisement et, dans les cas extr\u00eames, le coup de chaleur. Lorsque l\u2019humidex d\u00e9passe 45, le contexte est jug\u00e9 dangereux et lorsqu\u2019il d\u00e9passe 54, un coup de chaleur est consid\u00e9r\u00e9 comme imminent, ce qui impose d\u2019adapter imm\u00e9diatement les activit\u00e9s et la protection des populations.<\/p>\n<h2 id=\"7-lhumidex-estil-utilis-en-france\" class=\"font-editorial font-bold mb-2 mt-4 &#091;.has-inline-images_&amp;&#093;:clear-end text-base first:mt-0\">7. L\u2019humidex est\u2011il utilis\u00e9 en France ?<\/h2>\n<p class=\"my-2 &#091;&amp;+p&#093;:mt-4 &#091;&amp;_strong:has(+br)&#093;:inline-block &#091;&amp;_strong:has(+br)&#093;:align-top\">L\u2019humidex est un indice con\u00e7u et utilis\u00e9 principalement au Canada, mais il repose sur un principe universel : traduire la chaleur ressentie en combinant temp\u00e9rature et humidit\u00e9. En France, la communication m\u00e9t\u00e9o parle plus souvent de \u00ab temp\u00e9rature ressentie \u00bb ou d\u2019indices de chaleur \u00e9quivalents, qui s\u2019appuient sur les m\u00eames variables et la m\u00eame logique de confort thermique.<\/p>\n<h2 id=\"8-comment-interprter-lhumidex-sur-une-carte-mto\" class=\"font-editorial font-bold mb-2 mt-4 &#091;.has-inline-images_&amp;&#093;:clear-end text-base first:mt-0\">8. Comment interpr\u00e9ter l\u2019humidex sur une carte m\u00e9t\u00e9o ?<\/h2>\n<p class=\"my-2 &#091;&amp;+p&#093;:mt-4 &#091;&amp;_strong:has(+br)&#093;:inline-block &#091;&amp;_strong:has(+br)&#093;:align-top\">Sur une carte m\u00e9t\u00e9o, l\u2019humidex se lit comme une valeur de temp\u00e9rature ressentie, souvent accompagn\u00e9e d\u2019un code couleur qui permet d\u2019identifier rapidement les zones d\u2019inconfort ou de danger. Les seuils 30, 40, 45 et 54 structurent la lecture : en\u2011dessous de 30 les conditions restent supportables, au\u2011del\u00e0 de 40 les secteurs passent en forte chaleur ressentie, puis en danger et en risque imminent de coup de chaleur sur les valeurs les plus \u00e9lev\u00e9es.<\/p>\n<h2 id=\"9-que-faire-en-cas-dhumidex-suprieur--40-ou-45\" class=\"font-editorial font-bold mb-2 mt-4 &#091;.has-inline-images_&amp;&#093;:clear-end text-base first:mt-0\">9. Que faire en cas d\u2019humidex sup\u00e9rieur \u00e0 40 ou 45 ?<\/h2>\n<p class=\"my-2 &#091;&amp;+p&#093;:mt-4 &#091;&amp;_strong:has(+br)&#093;:inline-block &#091;&amp;_strong:has(+br)&#093;:align-top\">Lorsque l\u2019humidex d\u00e9passe 40, il est imp\u00e9ratif de limiter les efforts physiques, de s\u2019hydrater tr\u00e8s r\u00e9guli\u00e8rement et de rechercher des lieux ombrag\u00e9s ou climatis\u00e9s. Au\u2011del\u00e0 de 45, les conditions sont jug\u00e9es dangereuses et imposent de restreindre de nombreuses activit\u00e9s, de surveiller de pr\u00e8s les personnes vuln\u00e9rables et de mettre en place une vigilance sp\u00e9cifique face au risque de coup de chaleur.<\/p>\n<h2 id=\"10-quelle-est-la-diffrence-entre-lhumidex-et-lindi\" class=\"font-editorial font-bold mb-2 mt-4 &#091;.has-inline-images_&amp;&#093;:clear-end text-base first:mt-0\">10. Quelle est la diff\u00e9rence entre l\u2019humidex et l\u2019indice de chaleur am\u00e9ricain ?<\/h2>\n<p class=\"my-2 &#091;&amp;+p&#093;:mt-4 &#091;&amp;_strong:has(+br)&#093;:inline-block &#091;&amp;_strong:has(+br)&#093;:align-top\">L\u2019humidex canadien est calcul\u00e9 \u00e0 partir de la temp\u00e9rature de l\u2019air et du point de ros\u00e9e, tandis que l\u2019indice de chaleur am\u00e9ricain utilise la temp\u00e9rature et l\u2019humidit\u00e9 relative, ce qui conduit \u00e0 des valeurs proches mais obtenues par des approches diff\u00e9rentes. Dans les deux cas, il s\u2019agit d\u2019indices sans unit\u00e9 destin\u00e9s \u00e0 traduire la chaleur ressentie par une personne moyenne en conditions chaudes et humides, pour mieux communiquer sur les risques et le niveau d\u2019inconfort.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div><div class=\"fusion-text fusion-text-3\"><p>Source : www.meteociel.fr<\/p>\n<\/div><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":14485,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_seopress_titles_title":"Humidex en France : d\u00e9finition, seuils de danger et lecture des cartes m\u00e9t\u00e9o","_seopress_titles_desc":"D\u00e9couvrez l\u2019indice humidex en France : d\u00e9finition, calcul, seuils d\u2019inconfort et de danger, risques pour la sant\u00e9 et conseils pratiques pour lire vos cartes m\u00e9t\u00e9o et anticiper les coups de chaleur.","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"both","_seopress_redirections_param":"","_seopress_redirections_type":301,"_seopress_analysis_target_kw":"temperature mer","footnotes":""},"class_list":["post-60435","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/alertes-meteo.com\/index.php\/wp-json\/wp\/v2\/pages\/60435","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/alertes-meteo.com\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/alertes-meteo.com\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/alertes-meteo.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/alertes-meteo.com\/index.php\/wp-json\/wp\/v2\/comments?post=60435"}],"version-history":[{"count":3,"href":"https:\/\/alertes-meteo.com\/index.php\/wp-json\/wp\/v2\/pages\/60435\/revisions"}],"predecessor-version":[{"id":60469,"href":"https:\/\/alertes-meteo.com\/index.php\/wp-json\/wp\/v2\/pages\/60435\/revisions\/60469"}],"up":[{"embeddable":true,"href":"https:\/\/alertes-meteo.com\/index.php\/wp-json\/wp\/v2\/pages\/14485"}],"wp:attachment":[{"href":"https:\/\/alertes-meteo.com\/index.php\/wp-json\/wp\/v2\/media?parent=60435"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}