{"id":61076,"date":"2026-07-28T10:38:53","date_gmt":"2026-07-28T08:38:53","guid":{"rendered":"https:\/\/alertes-meteo.com\/?page_id=61076"},"modified":"2026-07-28T11:21:18","modified_gmt":"2026-07-28T09:21:18","slug":"ecart-a-la-moyenne-des-temperatures-en-novembre-depuis-1921-en-france-une-fin-dautomne-de-plus-en-plus-douce-cloned","status":"publish","type":"page","link":"https:\/\/alertes-meteo.com\/index.php\/climatologie\/ecart-a-la-moyenne-des-temperatures-en-novembre-depuis-1921-en-france-une-fin-dautomne-de-plus-en-plus-douce-cloned\/","title":{"rendered":"\u00c9cart \u00e0 la moyenne des temp\u00e9ratures en d\u00e9cembre depuis 1921 en France : un d\u00e9but d’hiver qui s’adoucit"},"content":{"rendered":"

\u00c9cart \u00e0 la moyenne des temp\u00e9ratures en d\u00e9cembre<\/b><\/h1>\n

D\u00e9cembre<\/strong> marque le d\u00e9but de l’hiver m\u00e9t\u00e9orologique en France. Ce mois est traditionnellement associ\u00e9 aux premi\u00e8res vagues de froid durables, aux gel\u00e9es g\u00e9n\u00e9ralis\u00e9es et aux chutes de neige, notamment en montagne. Pourtant, l’analyse des \u00e9carts \u00e0 la moyenne des temp\u00e9ratures depuis 1921 met en \u00e9vidence une \u00e9volution notable : les mois de d\u00e9cembre sont globalement plus doux qu’au cours du si\u00e8cle dernier. Cette tendance s’inscrit dans le contexte plus large du r\u00e9chauffement climatique observ\u00e9 en France.<\/p>\n

Une augmentation progressive des temp\u00e9ratures en d\u00e9cembre<\/h2>\n

Des anomalies positives de plus en plus fr\u00e9quentes<\/h3>\n

L’\u00e9cart \u00e0 la moyenne des temp\u00e9ratures<\/strong>, ou 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 1970, les mois de d\u00e9cembre alternaient entre \u00e9pisodes plus froids et plus doux, sans tendance durable. Depuis les ann\u00e9es 1980, les anomalies positives deviennent plus fr\u00e9quentes. Les temp\u00e9ratures moyennes d\u00e9passent r\u00e9guli\u00e8rement les normales saisonni\u00e8res, m\u00eame si certains mois de d\u00e9cembre restent marqu\u00e9s par des vagues de froid ponctuelles.<\/p>\n

Quels sont les impacts de cette \u00e9volution ?<\/h3>\n

Le r\u00e9chauffement observ\u00e9 en d\u00e9cembre entra\u00eene plusieurs cons\u00e9quences :<\/p>\n

    \n
  • une diminution de la fr\u00e9quence des \u00e9pisodes de froid prolong\u00e9s ;<\/li>\n
  • un recul de l’enneigement \u00e0 basse et moyenne altitude ;<\/li>\n
  • une r\u00e9duction du nombre de jours de gel dans plusieurs r\u00e9gions ;<\/li>\n
  • des modifications des cycles biologiques de certaines esp\u00e8ces ;<\/li>\n
  • une \u00e9volution des besoins en chauffage selon les ann\u00e9es.<\/li>\n<\/ul>\n

    Ces changements affectent \u00e9galement les stations de sports d’hiver, l’agriculture, la gestion de l’eau et les \u00e9cosyst\u00e8mes.<\/p>\n<\/div>\n

    \n
    \n

    \u00c9cart \u00e0 la moyenne des temp\u00e9ratures en decembre 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 d\u00e9cembre en France, de 1921 \u00e0 2025<\/title>\n <desc id=\"dec-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=\"dec-tooltip\" data-dec-tooltip role=\"status\" aria-hidden=\"true\"><\/div>\n <\/div>\n <\/div>\n\n <div class=\"dec-legend\" aria-label=\"L\u00e9gende\">\n <span><i class=\"dec-dot dec-dot-positive\"><\/i> Plus chaud que la normale<\/span>\n <span><i class=\"dec-dot dec-dot-negative\"><\/i> Plus froid que la normale<\/span>\n <\/div>\n\n <p class=\"dec-note\">D\u00e9cembre 2026 n\u2019a pas encore commenc\u00e9 : il n\u2019est pas inclus dans l\u2019histogramme.<\/p>\n <p class=\"dec-source\">\n Sources : MM\u00e9t\u00e9o-Paris (valeur 2025) \u2022 Normale climatologique 1991-2020\n <\/p>\n<\/div>\n\n<style>\n .dec-widget,\n .dec-widget * {\n box-sizing: border-box;\n }\n\n .dec-widget {\n --dec-red: #e85236;\n --dec-blue: #5c9ae3;\n --dec-grid: #dfe4ea;\n --dec-ink: #17202a;\n --dec-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(--dec-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 .dec-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 .dec-header p {\n margin: 8px 0 0;\n color: var(--dec-muted);\n font-size: 15px;\n }\n\n .dec-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 .dec-selection strong {\n color: var(--dec-ink);\n }\n\n .dec-selection.is-positive {\n background: #fff3f0;\n border-left-color: var(--dec-red);\n }\n\n .dec-selection.is-negative {\n background: #eff6ff;\n border-left-color: var(--dec-blue);\n }\n\n .dec-selection.is-neutral {\n background: #f5f7fa;\n border-left-color: #707b86;\n }\n\n .dec-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 .dec-stage {\n position: relative;\n width: 100%;\n min-width: 900px;\n }\n\n .dec-svg {\n display: block;\n width: 100%;\n height: auto;\n overflow: visible;\n touch-action: pan-x pan-y;\n }\n\n .dec-grid-line {\n stroke: var(--dec-grid);\n stroke-width: 1;\n vector-effect: non-scaling-stroke;\n }\n\n .dec-zero-line {\n stroke: #1c2732;\n stroke-width: 1.7;\n vector-effect: non-scaling-stroke;\n }\n\n .dec-y-label,\n .dec-x-label,\n .dec-axis-unit {\n fill: #68727d;\n font-family: Arial, Helvetica, sans-serif;\n }\n\n .dec-y-label {\n font-size: 13px;\n text-anchor: end;\n dominant-baseline: middle;\n }\n\n .dec-x-label {\n font-size: 11px;\n text-anchor: middle;\n }\n\n .dec-axis-unit {\n font-size: 12px;\n font-weight: 700;\n }\n\n .dec-bar {\n cursor: pointer;\n outline: none;\n }\n\n .dec-bar-visible {\n transition: opacity 0.14s ease, filter 0.14s ease;\n shape-rendering: geometricPrecision;\n }\n\n .dec-bar:hover .dec-bar-visible,\n .dec-bar:focus .dec-bar-visible,\n .dec-bar.is-selected .dec-bar-visible {\n opacity: 1;\n filter: brightness(0.83);\n }\n\n .dec-bar:focus-visible .dec-bar-visible {\n stroke: #111820;\n stroke-width: 2;\n vector-effect: non-scaling-stroke;\n }\n\n .dec-hit-area {\n fill: transparent;\n pointer-events: all;\n }\n\n .dec-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: \"dec-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(\"dec-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-novembre-depuis-1921-en-france-un-automne-de-plus-en-plus-doux\/\"><b>Pour le mois de novembre<\/b><\/a><\/p>\n<p style=\"text-align: right;\"><a href=\"https:\/\/alertes-meteo.com\/index.php\/climatologie\/ecart-a-la-moyenne-des-temperatures-en-janvier-depuis-1921-en-france-une-tendance-au-rechauffement-qui-saccelere\/\"><strong>Pour le mois de janvier<\/strong><\/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 d\u00e9cembre est sup\u00e9rieure \u00e0 la normale climatique. Cela n’emp\u00eache pas la survenue de vagues de froid, de chutes de neige ou d’\u00e9pisodes hivernaux parfois marqu\u00e9s.<\/p>\n<p class=\"isSelectedEnd\">\u00c0 l’inverse, une anomalie n\u00e9gative indique un mois globalement plus froid que la moyenne, une situation devenue moins fr\u00e9quente 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 class=\"isSelectedEnd\">Il correspond \u00e0 la diff\u00e9rence entre la temp\u00e9rature moyenne observ\u00e9e pendant le mois de d\u00e9cembre et la normale climatique de r\u00e9f\u00e9rence.<\/p>\n<h3>Pourquoi d\u00e9cembre devient-il plus doux ?<\/h3>\n<p class=\"isSelectedEnd\">Cette \u00e9volution est principalement li\u00e9e au r\u00e9chauffement climatique, qui entra\u00eene une hausse progressive des temp\u00e9ratures moyennes en France.<\/p>\n<h3>Peut-il encore faire tr\u00e8s froid en d\u00e9cembre ?<\/h3>\n<p class=\"isSelectedEnd\">Oui. Des vagues de froid et des \u00e9pisodes neigeux restent possibles, m\u00eame dans un contexte de r\u00e9chauffement climatique.<\/p>\n<h3>Depuis quand cette tendance est-elle visible ?<\/h3>\n<p class=\"isSelectedEnd\">Les anomalies positives deviennent nettement plus fr\u00e9quentes \u00e0 partir des ann\u00e9es 1980 et se poursuivent au XXI\u1d49 si\u00e8cle.<\/p>\n<h3>Quels secteurs sont les plus concern\u00e9s ?<\/h3>\n<p class=\"isSelectedEnd\">Les stations de montagne, les ressources en eau, l’agriculture, la biodiversit\u00e9 et la consommation \u00e9nerg\u00e9tique sont particuli\u00e8rement impact\u00e9es par cette \u00e9volution.<\/p>\n<h2>Conclusion<\/h2>\n<p class=\"isSelectedEnd\">L’\u00e9volution des temp\u00e9ratures en d\u00e9cembre depuis 1921 met en \u00e9vidence un adoucissement progressif du d\u00e9but de l’hiver en France. Les \u00e9carts positifs \u00e0 la moyenne deviennent plus fr\u00e9quents, illustrant les effets du changement climatique sur les saisons. Malgr\u00e9 cette tendance, les \u00e9pisodes hivernaux restent possibles et rappellent que la variabilit\u00e9 naturelle du climat demeure importante.<\/p>\n<h2>Consultez nos analyses climatiques<\/h2>\n<p>Explorez 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 observ\u00e9es depuis plus d’un si\u00e8cle.<\/p>\n<\/div><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":61079,"parent":60843,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_seopress_titles_title":"\u00c9cart \u00e0 la moyenne des temp\u00e9ratures en d\u00e9cembre en France depuis 1921 : \u00e9volution et anomalies climatiques","_seopress_titles_desc":"Analysez l'\u00e9volution des temp\u00e9ratures en d\u00e9cembre 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-61076","page","type-page","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/alertes-meteo.com\/index.php\/wp-json\/wp\/v2\/pages\/61076","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=61076"}],"version-history":[{"count":6,"href":"https:\/\/alertes-meteo.com\/index.php\/wp-json\/wp\/v2\/pages\/61076\/revisions"}],"predecessor-version":[{"id":61099,"href":"https:\/\/alertes-meteo.com\/index.php\/wp-json\/wp\/v2\/pages\/61076\/revisions\/61099"}],"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\/61079"}],"wp:attachment":[{"href":"https:\/\/alertes-meteo.com\/index.php\/wp-json\/wp\/v2\/media?parent=61076"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}