{"id":3010,"date":"2025-05-27T06:21:05","date_gmt":"2025-05-27T10:21:05","guid":{"rendered":"https:\/\/us.weatheramerica.com\/?p=3010"},"modified":"2025-06-27T04:15:23","modified_gmt":"2025-06-27T08:15:23","slug":"weather-oregon-heat-wave-builds-over-portland","status":"publish","type":"post","link":"https:\/\/weatheramerica.com\/us\/2025\/05\/27\/weather-oregon-heat-wave-builds-over-portland\/","title":{"rendered":"Weather Oregon: Heat wave builds over Portland"},"content":{"rendered":"<p><img loading=\"lazy\" loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3011\" src=\"http:\/\/us.weatheramerica.com\/wp-content\/uploads\/sites\/2\/2025\/05\/heat-wave-in-portland_2705.jpg\" alt=\"\" width=\"2122\" height=\"1412\" srcset=\"https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/05\/heat-wave-in-portland_2705.jpg 2122w, https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/05\/heat-wave-in-portland_2705-768x511.jpg 768w, https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/05\/heat-wave-in-portland_2705-1536x1022.jpg 1536w, https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/05\/heat-wave-in-portland_2705-2048x1363.jpg 2048w, https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/05\/heat-wave-in-portland_2705-330x220.jpg 330w, https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/05\/heat-wave-in-portland_2705-420x280.jpg 420w, https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/05\/heat-wave-in-portland_2705-615x410.jpg 615w, https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/05\/heat-wave-in-portland_2705-860x572.jpg 860w, https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/05\/heat-wave-in-portland_2705-219x146.jpg 219w\" sizes=\"auto, (max-width: 2122px) 100vw, 2122px\" \/><\/p>\n<p><strong>Unseasonably hot air to engulf Portland and Vancouver metro<\/strong><\/p>\n<p>A <strong>powerful ridge of high pressure<\/strong> is settling over the <strong>Pacific Northwest<\/strong>, creating what may be the <strong>hottest stretch of weather so far this year<\/strong> for the <strong>Portland<\/strong> and <strong>Vancouver<\/strong> metro areas. As of this week, <strong>temperatures are forecast to climb well above seasonal norms<\/strong>, with the potential to reach the <strong>upper 80s (31\u201332\u202f\u00b0C)<\/strong> and even <strong>hit 90 \u00b0F (32.2 \u00b0C)<\/strong> in parts of the <strong>Willamette Valley<\/strong>.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Temperature timeline and patterns<\/strong><\/p>\n<p>The <strong>heat will build quickly<\/strong>, with <strong>lower 80s (27\u201328 \u00b0C)<\/strong> expected as early as <strong>Tuesday<\/strong>, ramping up to <strong>upper 80s (31\u201332 \u00b0C)<\/strong> or <strong>potentially 90 \u00b0F (32.2 \u00b0C)<\/strong> by <strong>Wednesday<\/strong>. This surge aligns with the <strong>peak intensity<\/strong> of the <strong>high-pressure system<\/strong>, which will drive <strong>sunny skies<\/strong> and <strong>dry conditions<\/strong> across the region.<\/p>\n<p>By <strong>Thursday<\/strong>, a <strong>temporary weakening<\/strong> of the ridge will allow for a <strong>brief cooldown<\/strong>, with highs <strong>dropping into the mid-70s (23\u201324 \u00b0C)<\/strong>\u2014still warm, but noticeably cooler than the peak. However, <strong>another ridge<\/strong> is forecast to <strong>rebuild quickly<\/strong>, pushing temps back <strong>into the 80s and possibly low 90s<\/strong> by the <strong>weekend<\/strong>.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>May heat: Anomaly or expectation?<\/strong><\/p>\n<p>Late <strong>May<\/strong> in <strong>Portland<\/strong> typically features <strong>average highs in the lower 70s (21\u201322 \u00b0C)<\/strong>. This week\u2019s forecasted warmth will land <strong>10 to 15 degrees above normal<\/strong>, making it <strong>rare but not unprecedented<\/strong>. On average, <strong>Portland\u2019s first 90 \u00b0F (32.2 \u00b0C)<\/strong> day doesn\u2019t arrive until <strong>June 18th<\/strong>, underlining just how <strong>early and extreme<\/strong> this heat wave could be.<\/p>\n<p>Stay aware of local conditions as <strong>forecast models evolve<\/strong> throughout the week. The <strong>KOIN 6 Weather Team<\/strong> will continue monitoring the changes, especially as the <strong>second wave of warmth approaches<\/strong> for the <strong>weekend<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Unseasonably hot air to engulf Portland and Vancouver metro A powerful ridge of high pressure is settling over the Pacific Northwest, creating what may be the hottest stretch of weather so far this year for the Portland and Vancouver metro areas. As of this week, temperatures are forecast to climb well above seasonal norms, with [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":3011,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3010","post","type-post","status-publish","format-standard","has-post-thumbnail","category-news"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Weather Oregon: Heat wave builds over Portland - United States - Weather America<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/weatheramerica.com\/us\/2025\/05\/27\/weather-oregon-heat-wave-builds-over-portland\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Weather Oregon: Heat wave builds over Portland - United States - Weather America\" \/>\n<meta property=\"og:description\" content=\"Unseasonably hot air to engulf Portland and Vancouver metro A powerful ridge of high pressure is settling over the Pacific Northwest, creating what may be the hottest stretch of weather so far this year for the Portland and Vancouver metro areas. As of this week, temperatures are forecast to climb well above seasonal norms, with [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/weatheramerica.com\/us\/2025\/05\/27\/weather-oregon-heat-wave-builds-over-portland\/\" \/>\n<meta property=\"og:site_name\" content=\"United States - Weather America\" \/>\n<meta property=\"article:published_time\" content=\"2025-05-27T10:21:05+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-06-27T08:15:23+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/05\/heat-wave-in-portland_2705.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"2122\" \/>\n\t<meta property=\"og:image:height\" content=\"1412\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Daniel Swain\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Daniel Swain\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/weatheramerica.com\/us\/2025\/05\/27\/weather-oregon-heat-wave-builds-over-portland\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/weatheramerica.com\/us\/2025\/05\/27\/weather-oregon-heat-wave-builds-over-portland\/\"},\"author\":{\"name\":\"Daniel Swain\",\"@id\":\"https:\/\/weatheramerica.com\/us\/#\/schema\/person\/cd71e646398f7e54b04cfbb293b310c7\"},\"headline\":\"Weather Oregon: Heat wave builds over Portland\",\"datePublished\":\"2025-05-27T10:21:05+00:00\",\"dateModified\":\"2025-06-27T08:15:23+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/weatheramerica.com\/us\/2025\/05\/27\/weather-oregon-heat-wave-builds-over-portland\/\"},\"wordCount\":278,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/weatheramerica.com\/us\/2025\/05\/27\/weather-oregon-heat-wave-builds-over-portland\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/05\/heat-wave-in-portland_2705.jpg\",\"articleSection\":[\"News\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/weatheramerica.com\/us\/2025\/05\/27\/weather-oregon-heat-wave-builds-over-portland\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/weatheramerica.com\/us\/2025\/05\/27\/weather-oregon-heat-wave-builds-over-portland\/\",\"url\":\"https:\/\/weatheramerica.com\/us\/2025\/05\/27\/weather-oregon-heat-wave-builds-over-portland\/\",\"name\":\"Weather Oregon: Heat wave builds over Portland - 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