{"id":61050,"date":"2026-07-28T09:39:55","date_gmt":"2026-07-28T07:39:55","guid":{"rendered":"https:\/\/alertes-meteo.com\/?page_id=61050"},"modified":"2026-07-28T11:19:55","modified_gmt":"2026-07-28T09:19:55","slug":"ecart-a-la-moyenne-des-temperatures-en-juillet-depuis-1921-en-france-un-rechauffement-estival-de-plus-en-plus-marque","status":"publish","type":"page","link":"https:\/\/alertes-meteo.com\/index.php\/climatologie\/ecart-a-la-moyenne-des-temperatures-en-juillet-depuis-1921-en-france-un-rechauffement-estival-de-plus-en-plus-marque\/","title":{"rendered":"\u00c9cart \u00e0 la moyenne des temp\u00e9ratures en juillet depuis 1921 en France : un r\u00e9chauffement estival de plus en plus marqu\u00e9"},"content":{"rendered":"

\u00c9cart \u00e0 la moyenne des temp\u00e9ratures en juillet<\/b><\/h1>\n

Juillet<\/strong> est traditionnellement le mois le plus chaud de l’ann\u00e9e en France. C’est \u00e9galement celui o\u00f9 les vagues de chaleur et les canicules peuvent atteindre leur intensit\u00e9 maximale. L’analyse des \u00e9carts \u00e0 la moyenne des temp\u00e9ratures depuis 1921 r\u00e9v\u00e8le une \u00e9volution particuli\u00e8rement marqu\u00e9e : les mois de juillet sont devenus nettement plus chauds au fil des d\u00e9cennies. Cette tendance illustre l’acc\u00e9l\u00e9ration du r\u00e9chauffement climatique observ\u00e9e sur l’ensemble du territoire fran\u00e7ais.<\/p>\n

Une augmentation continue des temp\u00e9ratures en juillet<\/h2>\n

Des anomalies positives de plus en plus importantes<\/h3>\n

L’\u00e9cart \u00e0 la moyenne des temp\u00e9ratures<\/strong>, \u00e9galement appel\u00e9 anomalie thermique, correspond \u00e0 la diff\u00e9rence entre la temp\u00e9rature moyenne observ\u00e9e et la normale climatique de r\u00e9f\u00e9rence.<\/p>\n

Entre 1921 et les ann\u00e9es 1980, les mois de juillet alternaient entre p\u00e9riodes l\u00e9g\u00e8rement plus fra\u00eeches et plus chaudes que la moyenne. Depuis plusieurs d\u00e9cennies, les anomalies positives sont devenues largement dominantes. Certains mois de juillet figurent d\u00e9sormais parmi les plus chauds jamais enregistr\u00e9s en France, avec des temp\u00e9ratures d\u00e9passant parfois largement les normales saisonni\u00e8res.<\/p>\n

Des cons\u00e9quences importantes sur le territoire<\/h3>\n

Le r\u00e9chauffement du mois de juillet entra\u00eene de nombreux impacts :<\/p>\n

    \n
  • une multiplication des \u00e9pisodes de fortes chaleurs et des canicules ;<\/li>\n
  • une aggravation des s\u00e9cheresses estivales ;<\/li>\n
  • une augmentation du risque d’incendies de for\u00eat ;<\/li>\n
  • des tensions accrues sur les ressources en eau ;<\/li>\n
  • des effets plus marqu\u00e9s sur la sant\u00e9 des populations vuln\u00e9rables.<\/li>\n<\/ul>\n

    Ces \u00e9volutions concernent \u00e9galement l’agriculture, les \u00e9cosyst\u00e8mes, le tourisme et la consommation d’\u00e9nergie.<\/p>\n<\/div>\n

    \n
    \n

    \u00c9cart \u00e0 la moyenne des temp\u00e9ratures en juillet depuis 1921 (France)<\/h2>\n

    Normale de r\u00e9f\u00e9rence 1991-2020<\/p>\n <\/div>\n\n

    \n Cliquez sur une barre pour afficher l\u2019ann\u00e9e et l\u2019\u00e9cart \u00e0 la normale.\n <\/div>\n\n
    \n
    \n \n Anomalies de temp\u00e9rature en juillet en France, de 1921 \u00e0 2025<\/title>\n <desc id=\"jul-desc\">\n Histogramme des \u00e9carts \u00e0 la normale 1991-2020. Les valeurs positives sont rouges\n et les valeurs n\u00e9gatives sont bleues. Chaque barre est interactive.\n <\/desc>\n <\/svg>\n <div class=\"jul-tooltip\" data-jul-tooltip role=\"status\" aria-hidden=\"true\"><\/div>\n <\/div>\n <\/div>\n\n <div class=\"jul-legend\" aria-label=\"L\u00e9gende\">\n <span><i class=\"jul-dot jul-dot-positive\"><\/i> Plus chaud que la normale<\/span>\n <span><i class=\"jul-dot jul-dot-negative\"><\/i> Plus froid que la normale<\/span>\n <\/div>\n\n <p class=\"jul-note\">Juillet 2026 est encore en cours : il n\u2019est pas inclus dans l\u2019histogramme.<\/p>\n <p class=\"jul-source\">\n Sources : M\u00e9t\u00e9o-France (valeur 2025) \u2022 Normale climatologique 1991-2020\n <\/p>\n<\/div>\n\n<style>\n .jul-widget,\n .jul-widget * {\n box-sizing: border-box;\n }\n\n .jul-widget {\n --jul-red: #e85236;\n --jul-blue: #5c9ae3;\n --jul-grid: #dfe4ea;\n --jul-ink: #17202a;\n --jul-muted: #59636e;\n width: 100%;\n max-width: 1180px;\n margin: 24px auto;\n padding: clamp(18px, 3vw, 32px);\n overflow: hidden;\n color: var(--jul-ink);\n background: #ffffff;\n border: 1px solid #e8ebef;\n border-radius: 18px;\n box-shadow: 0 12px 34px rgba(23, 32, 42, 0.09);\n font-family: Arial, Helvetica, sans-serif;\n }\n\n .jul-header h2 {\n margin: 0;\n font-size: clamp(21px, 2.6vw, 31px);\n line-height: 1.18;\n letter-spacing: -0.02em;\n }\n\n .jul-header p {\n margin: 8px 0 0;\n color: var(--jul-muted);\n font-size: 15px;\n }\n\n .jul-selection {\n min-height: 49px;\n margin: 20px 0 12px;\n padding: 12px 15px;\n color: #34404c;\n background: #f5f7fa;\n border-left: 4px solid #8995a3;\n border-radius: 9px;\n font-size: 15px;\n line-height: 1.4;\n }\n\n .jul-selection strong {\n color: var(--jul-ink);\n }\n\n .jul-selection.is-positive {\n background: #fff3f0;\n border-left-color: var(--jul-red);\n }\n\n .jul-selection.is-negative {\n background: #eff6ff;\n border-left-color: var(--jul-blue);\n }\n\n .jul-selection.is-neutral {\n background: #f5f7fa;\n border-left-color: #707b86;\n }\n\n .jul-scroll {\n width: 100%;\n overflow-x: auto;\n overflow-y: hidden;\n scrollbar-color: #aeb7c2 #edf0f3;\n scrollbar-width: thin;\n -webkit-overflow-scrolling: touch;\n }\n\n .jul-stage {\n position: relative;\n width: 100%;\n min-width: 900px;\n }\n\n .jul-svg {\n display: block;\n width: 100%;\n height: auto;\n overflow: visible;\n touch-action: pan-x pan-y;\n }\n\n .jul-grid-line {\n stroke: var(--jul-grid);\n stroke-width: 1;\n vector-effect: non-scaling-stroke;\n }\n\n .jul-zero-line {\n stroke: #1c2732;\n stroke-width: 1.7;\n vector-effect: non-scaling-stroke;\n }\n\n .jul-y-label,\n .jul-x-label,\n .jul-axis-unit {\n fill: #68727d;\n font-family: Arial, Helvetica, sans-serif;\n }\n\n .jul-y-label {\n font-size: 13px;\n text-anchor: end;\n dominant-baseline: middle;\n }\n\n .jul-x-label {\n font-size: 11px;\n text-anchor: middle;\n }\n\n .jul-axis-unit {\n font-size: 12px;\n font-weight: 700;\n }\n\n .jul-bar {\n cursor: pointer;\n outline: none;\n }\n\n .jul-bar-visible {\n transition: opacity 0.14s ease, filter 0.14s ease;\n shape-rendering: geometricPrecision;\n }\n\n .jul-bar:hover .jul-bar-visible,\n .jul-bar:focus .jul-bar-visible,\n .jul-bar.is-selected .jul-bar-visible {\n opacity: 1;\n filter: brightness(0.83);\n }\n\n .jul-bar:focus-visible .jul-bar-visible {\n stroke: #111820;\n stroke-width: 2;\n vector-effect: non-scaling-stroke;\n }\n\n .jul-hit-area {\n fill: transparent;\n pointer-events: all;\n }\n\n .jul-tooltip {\n position: absolute;\n z-index: 4;\n width: max-content;\n max-width: 235px;\n padding: 10px 12px;\n color: #ffffff;\n background: rgba(18, 25, 33, 0.96);\n border-radius: 9px;\n box-shadow: 0 8px 24px rgba(0, 0, 0, 0.22);\n font-size: 13px;\n line-height: 1.35;\n pointer-events: none;\n opacity: 0;\n transform: translate(-50%, calc(-100% - 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25,\n class: \"jul-x-label\"\n });\n label.textContent = year;\n labelsGroup.appendChild(label);\n });\n svg.appendChild(labelsGroup);\n\n svg.addEventListener(\"click\", (event) => {\n if (event.target === svg || event.target.classList.contains(\"jul-grid-line\")) {\n removeSelection();\n hideTooltip();\n }\n });\n });\n })();\n<\/script><div class=\"fusion-text fusion-text-2\"><p><a href=\"https:\/\/alertes-meteo.com\/index.php\/climatologie\/ecart-a-la-moyenne-des-temperatures-en-mai-depuis-1921-en-france-un-mois-de-plus-en-plus-chaud-cloned\/\">Pour le moi de juin<\/a><\/p>\n<p style=\"text-align: right;\"><a href=\"https:\/\/alertes-meteo.com\/index.php\/climatologie\/ecart-a-la-moyenne-des-temperatures-en-aout-depuis-1921-en-france-un-mois-dete-toujours-plus-chaud\/\">Pour le mois de ao\u00fbt<\/a><\/p>\n<\/div><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-3\"><h2>Comment interpr\u00e9ter un \u00e9cart \u00e0 la moyenne ?<\/h2>\n<p class=\"isSelectedEnd\">Une anomalie positive signifie que la temp\u00e9rature moyenne du mois de juillet est sup\u00e9rieure \u00e0 la normale climatique. Cela n’emp\u00eache pas la survenue d’orages, de passages perturb\u00e9s ou de p\u00e9riodes temporairement plus fra\u00eeches.<\/p>\n<p class=\"isSelectedEnd\">\u00c0 l’inverse, une anomalie n\u00e9gative indique un mois globalement plus frais que la moyenne, un ph\u00e9nom\u00e8ne devenu plus rare au cours des derni\u00e8res d\u00e9cennies.<\/p>\n<h2>FAQ<\/h2>\n<h3>Que signifie une anomalie positive en juillet ?<\/h3>\n<p class=\"isSelectedEnd\">Elle indique que la temp\u00e9rature moyenne du mois est sup\u00e9rieure \u00e0 la normale climatique de r\u00e9f\u00e9rence.<\/p>\n<h3>Pourquoi les mois de juillet deviennent-ils plus chauds ?<\/h3>\n<p class=\"isSelectedEnd\">La principale explication r\u00e9side dans le r\u00e9chauffement climatique, qui favorise une augmentation progressive des temp\u00e9ratures moyennes et une intensification des \u00e9pisodes de chaleur.<\/p>\n<h3>Les canicules sont-elles plus fr\u00e9quentes ?<\/h3>\n<p class=\"isSelectedEnd\">Oui. Les observations montrent une augmentation de la fr\u00e9quence, de l’intensit\u00e9 et parfois de la dur\u00e9e des \u00e9pisodes caniculaires en France.<\/p>\n<h3>Depuis quand cette \u00e9volution est-elle visible ?<\/h3>\n<p class=\"isSelectedEnd\">La tendance au r\u00e9chauffement s’accentue nettement \u00e0 partir des ann\u00e9es 1980, avec une succession de mois de juillet affichant des anomalies positives.<\/p>\n<h3>Quels secteurs sont les plus concern\u00e9s ?<\/h3>\n<p class=\"isSelectedEnd\">La sant\u00e9 publique, l’agriculture, les ressources en eau, les for\u00eats, les infrastructures et la biodiversit\u00e9 sont particuli\u00e8rement sensibles \u00e0 cette hausse des temp\u00e9ratures.<\/p>\n<h2>Conclusion<\/h2>\n<p class=\"isSelectedEnd\">L’\u00e9volution des temp\u00e9ratures en juillet depuis 1921 met en \u00e9vidence une augmentation durable des anomalies positives en France. Les mois de juillet sont aujourd’hui plus chauds qu’au si\u00e8cle dernier, avec une fr\u00e9quence accrue des fortes chaleurs et des canicules. Cette \u00e9volution constitue l’un des indicateurs les plus visibles du changement climatique.<\/p>\n<h2>Consultez nos analyses climatiques<\/h2>\n<p>Retrouvez nos graphiques climatiques, nos statistiques m\u00e9t\u00e9o, nos <a href=\"https:\/\/alertes-meteo.com\/index.php\/2026\/07\/27\/previsions-saisonnieres\/\">pr\u00e9visions saisonni\u00e8res<\/a> et nos analyses d\u00e9taill\u00e9es pour suivre l’\u00e9volution des temp\u00e9ratures en France et mieux comprendre les tendances du climat sur le long terme.<\/p>\n<\/div><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":61052,"parent":60843,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_seopress_titles_title":"\u00c9cart \u00e0 la moyenne des temp\u00e9ratures en juillet en France depuis 1921 : \u00e9volution et anomalies climatiques","_seopress_titles_desc":"Analysez l'\u00e9volution des temp\u00e9ratures en juillet en France depuis 1921 et d\u00e9couvrez les \u00e9carts \u00e0 la moyenne qui illustrent le r\u00e9chauffement climatique.","_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-61050","page","type-page","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/alertes-meteo.com\/index.php\/wp-json\/wp\/v2\/pages\/61050","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=61050"}],"version-history":[{"count":4,"href":"https:\/\/alertes-meteo.com\/index.php\/wp-json\/wp\/v2\/pages\/61050\/revisions"}],"predecessor-version":[{"id":61094,"href":"https:\/\/alertes-meteo.com\/index.php\/wp-json\/wp\/v2\/pages\/61050\/revisions\/61094"}],"up":[{"embeddable":true,"href":"https:\/\/alertes-meteo.com\/index.php\/wp-json\/wp\/v2\/pages\/60843"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/alertes-meteo.com\/index.php\/wp-json\/wp\/v2\/media\/61052"}],"wp:attachment":[{"href":"https:\/\/alertes-meteo.com\/index.php\/wp-json\/wp\/v2\/media?parent=61050"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}