{"id":61029,"date":"2026-07-28T09:19:36","date_gmt":"2026-07-28T07:19:36","guid":{"rendered":"https:\/\/alertes-meteo.com\/?page_id=61029"},"modified":"2026-07-28T10:15:16","modified_gmt":"2026-07-28T08:15:16","slug":"ecart-a-la-moyenne-des-temperatures-en-mai-depuis-1921-en-france-un-mois-de-plus-en-plus-chaud","status":"publish","type":"page","link":"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\/","title":{"rendered":"\u00c9cart \u00e0 la moyenne des temp\u00e9ratures en mai depuis 1921 en France : un mois de plus en plus chaud"},"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>M\u00e9t\u00e9o en France &#8211; Climatologie<\/b><\/h1>\n<p>Le mois de mai marque l&rsquo;installation progressive des conditions printani\u00e8res, avec des journ\u00e9es plus longues et des temp\u00e9ratures en hausse. Toutefois, l&rsquo;analyse des \u00e9carts \u00e0 la moyenne des temp\u00e9ratures depuis 1921 montre que ce mois conna\u00eet une \u00e9volution climatique significative. Les donn\u00e9es mettent en \u00e9vidence une augmentation progressive des temp\u00e9ratures moyennes, avec des anomalies positives de plus en plus fr\u00e9quentes au cours des derni\u00e8res d\u00e9cennies.<\/p>\n<h2>Une hausse des temp\u00e9ratures de mai depuis un si\u00e8cle<\/h2>\n<h3>Des anomalies de plus en plus marqu\u00e9es<\/h3>\n<p>L&rsquo;<strong>\u00e9cart \u00e0 la moyenne des temp\u00e9ratures<\/strong>, aussi 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<p>Entre 1921 et la fin des ann\u00e9es 1970, les mois de mai alternaient r\u00e9guli\u00e8rement entre p\u00e9riodes plus fra\u00eeches et plus chaudes que la moyenne. Depuis les ann\u00e9es 1980, les anomalies positives sont devenues largement dominantes. Cette \u00e9volution confirme une hausse durable des temp\u00e9ratures printani\u00e8res en France, en coh\u00e9rence avec les observations climatiques nationales.<\/p>\n<h3>Des cons\u00e9quences sur les \u00e9cosyst\u00e8mes<\/h3>\n<p>Des temp\u00e9ratures plus \u00e9lev\u00e9es en mai influencent directement de nombreux secteurs :<\/p>\n<ul data-spread=\"false\">\n<li>une croissance plus rapide de la v\u00e9g\u00e9tation ;<\/li>\n<li>une floraison plus pr\u00e9coce de certaines esp\u00e8ces ;<\/li>\n<li>une augmentation des besoins en eau des cultures ;<\/li>\n<li>un risque accru d&rsquo;\u00e9pisodes de s\u00e9cheresse d\u00e8s la fin du printemps ;<\/li>\n<li>une modification des cycles biologiques de la faune et de la flore.<\/li>\n<\/ul>\n<p>Ces \u00e9volutions peuvent \u00e9galement favoriser l&rsquo;apparition plus pr\u00e9coce des premi\u00e8res chaleurs estivales.<\/p>\n<\/div><!--\n  Graphique interactif WordPress\n  \u00c0 coller dans un bloc \u00ab HTML personnalis\u00e9 \u00bb.\n  Aucune biblioth\u00e8que externe n'est n\u00e9cessaire.\n-->\n<div class=\"may-widget\" data-may-chart>\n  <div class=\"may-header\">\n    <h2>\u00c9cart \u00e0 la moyenne des temp\u00e9ratures en mai depuis 1921 (France)<\/h2>\n    <p>Normale de r\u00e9f\u00e9rence 1991-2020<\/p>\n  <\/div>\n\n  <div class=\"may-selection\" data-may-selection aria-live=\"polite\">\n    Cliquez sur une barre pour afficher l\u2019ann\u00e9e et l\u2019\u00e9cart \u00e0 la normale.\n  <\/div>\n\n  <div class=\"may-scroll\" aria-label=\"Graphique d\u00e9filable horizontalement sur mobile\">\n    <div class=\"may-stage\">\n      <svg\n        class=\"may-svg\"\n        data-may-svg\n        viewBox=\"0 0 1120 500\"\n        role=\"img\"\n        aria-labelledby=\"may-title may-desc\"\n        preserveAspectRatio=\"xMidYMid meet\"\n      >\n        <title id=\"may-title\">Anomalies de temp\u00e9rature en mai en France, de 1921 \u00e0 2026<\/title>\n        <desc id=\"may-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=\"may-tooltip\" data-may-tooltip role=\"status\" aria-hidden=\"true\"><\/div>\n    <\/div>\n  <\/div>\n\n  <div class=\"may-legend\" aria-label=\"L\u00e9gende\">\n    <span><i class=\"may-dot may-dot-positive\"><\/i> Plus chaud que la normale<\/span>\n    <span><i class=\"may-dot may-dot-negative\"><\/i> Plus froid que la normale<\/span>\n  <\/div>\n\n  <p class=\"may-source\">Source : M\u00e9t\u00e9o-France \u2022 Normale climatologique 1991-2020<\/p>\n<\/div>\n\n<style>\n  .may-widget,\n  .may-widget * {\n    box-sizing: border-box;\n  }\n\n  .may-widget {\n    --may-red: #e85236;\n    --may-blue: #5c9ae3;\n    --may-grid: #dfe4ea;\n    --may-ink: #17202a;\n    --may-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(--may-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  .may-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  .may-header p {\n    margin: 8px 0 0;\n    color: var(--may-muted);\n    font-size: 15px;\n  }\n\n  .may-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  .may-selection strong {\n    color: var(--may-ink);\n  }\n\n  .may-selection.is-positive {\n    background: #fff3f0;\n    border-left-color: var(--may-red);\n  }\n\n  .may-selection.is-negative {\n    background: #eff6ff;\n    border-left-color: var(--may-blue);\n  }\n\n  .may-selection.is-neutral {\n    background: #f5f7fa;\n    border-left-color: #707b86;\n  }\n\n  .may-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  .may-stage {\n    position: relative;\n    width: 100%;\n    min-width: 900px;\n  }\n\n  .may-svg {\n    display: block;\n    width: 100%;\n    height: auto;\n    overflow: visible;\n    touch-action: pan-x pan-y;\n  }\n\n  .may-grid-line {\n    stroke: var(--may-grid);\n    stroke-width: 1;\n    vector-effect: non-scaling-stroke;\n  }\n\n  .may-zero-line {\n    stroke: #1c2732;\n    stroke-width: 1.7;\n    vector-effect: non-scaling-stroke;\n  }\n\n  .may-y-label,\n  .may-x-label,\n  .may-axis-unit {\n    fill: #68727d;\n    font-family: Arial, Helvetica, sans-serif;\n  }\n\n  .may-y-label {\n    font-size: 13px;\n    text-anchor: end;\n    dominant-baseline: middle;\n  }\n\n  .may-x-label {\n    font-size: 11px;\n    text-anchor: middle;\n  }\n\n  .may-axis-unit {\n    font-size: 12px;\n    font-weight: 700;\n  }\n\n  .may-bar {\n    cursor: pointer;\n    outline: none;\n  }\n\n  .may-bar-visible {\n    transition: opacity 0.14s ease, filter 0.14s ease;\n    shape-rendering: geometricPrecision;\n  }\n\n  .may-bar:hover .may-bar-visible,\n  .may-bar:focus .may-bar-visible,\n  .may-bar.is-selected .may-bar-visible {\n    opacity: 1;\n    filter: brightness(0.83);\n  }\n\n  .may-bar:focus-visible .may-bar-visible {\n    stroke: #111820;\n    stroke-width: 2;\n    vector-effect: non-scaling-stroke;\n  }\n\n  .may-hit-area {\n    fill: transparent;\n    pointer-events: all;\n  }\n\n  .may-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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Cela ne signifie pas que toutes les journ\u00e9es ont \u00e9t\u00e9 chaudes : des p\u00e9riodes fra\u00eeches, pluvieuses ou des orages peuvent toujours se produire.<\/p>\n<p>\u00c0 l&rsquo;inverse, une anomalie n\u00e9gative traduit un mois 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 repr\u00e9sente un \u00e9cart \u00e0 la moyenne des temp\u00e9ratures ?<\/h3>\n<p>Il mesure la diff\u00e9rence entre la temp\u00e9rature moyenne observ\u00e9e et la normale climatique de r\u00e9f\u00e9rence.<\/p>\n<h3>Pourquoi les temp\u00e9ratures de mai augmentent-elles ?<\/h3>\n<p>Cette hausse est principalement li\u00e9e au r\u00e9chauffement climatique, qui entra\u00eene une augmentation progressive des temp\u00e9ratures moyennes en France.<\/p>\n<h3>Peut-il encore faire froid en mai ?<\/h3>\n<p>Oui. Des matin\u00e9es fra\u00eeches ou des \u00e9pisodes de fra\u00eecheur restent possibles, notamment lors de descentes d&rsquo;air polaire ou de perturbations durables.<\/p>\n<h3>Depuis quand cette tendance est-elle visible ?<\/h3>\n<p>Les anomalies positives deviennent nettement plus fr\u00e9quentes \u00e0 partir des ann\u00e9es 1980.<\/p>\n<h3>Quels sont les impacts sur l&rsquo;agriculture ?<\/h3>\n<p>Des temp\u00e9ratures plus \u00e9lev\u00e9es acc\u00e9l\u00e8rent le d\u00e9veloppement des cultures, mais augmentent \u00e9galement les besoins en eau et le risque de stress hydrique en cas de d\u00e9ficit de pr\u00e9cipitations.<\/p>\n<h2>Conclusion<\/h2>\n<p>L&rsquo;\u00e9volution des temp\u00e9ratures en mai depuis 1921 confirme une tendance durable au r\u00e9chauffement en France. Les \u00e9carts positifs \u00e0 la moyenne deviennent de plus en plus fr\u00e9quents, modifiant progressivement les conditions climatiques du printemps et leurs cons\u00e9quences sur les \u00e9cosyst\u00e8mes comme sur les activit\u00e9s humaines.<\/p>\n<h2>Consultez nos analyses climatiques<\/h2>\n<p>Suivez l&rsquo;\u00e9volution des temp\u00e9ratures en France gr\u00e2ce \u00e0 nos graphiques climatiques, nos statistiques m\u00e9t\u00e9o, nos pr\u00e9visions saisonni\u00e8res et nos analyses d\u00e9taill\u00e9es pour mieux comprendre les tendances observ\u00e9es depuis plus d&rsquo;un si\u00e8cle.<\/p>\n<\/div><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":61035,"parent":60843,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_seopress_titles_title":"\u00c9cart \u00e0 la moyenne des temp\u00e9ratures en mai en France depuis 1921 : \u00e9volution et anomalies climatiques","_seopress_titles_desc":"Analysez l'\u00e9volution des temp\u00e9ratures en mai 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-61029","page","type-page","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/alertes-meteo.com\/index.php\/wp-json\/wp\/v2\/pages\/61029","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=61029"}],"version-history":[{"count":6,"href":"https:\/\/alertes-meteo.com\/index.php\/wp-json\/wp\/v2\/pages\/61029\/revisions"}],"predecessor-version":[{"id":61065,"href":"https:\/\/alertes-meteo.com\/index.php\/wp-json\/wp\/v2\/pages\/61029\/revisions\/61065"}],"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\/61035"}],"wp:attachment":[{"href":"https:\/\/alertes-meteo.com\/index.php\/wp-json\/wp\/v2\/media?parent=61029"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}