{"id":5649,"date":"2025-07-09T04:31:24","date_gmt":"2025-07-09T08:31:24","guid":{"rendered":"https:\/\/us.weatheramerica.com\/?p=5649"},"modified":"2025-07-09T04:31:24","modified_gmt":"2025-07-09T08:31:24","slug":"weather-california-heat-wave-ramps-up-across-inland-valleys","status":"publish","type":"post","link":"https:\/\/weatheramerica.com\/us\/2025\/07\/09\/weather-california-heat-wave-ramps-up-across-inland-valleys\/","title":{"rendered":"Weather California: heat wave ramps up across inland valleys"},"content":{"rendered":"<p><img loading=\"lazy\" loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-5650\" src=\"http:\/\/us.weatheramerica.com\/wp-content\/uploads\/sites\/2\/2025\/07\/California-0907.jpg\" alt=\"\" width=\"2121\" height=\"1414\" srcset=\"https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/07\/California-0907.jpg 2121w, https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/07\/California-0907-768x512.jpg 768w, https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/07\/California-0907-1536x1024.jpg 1536w, https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/07\/California-0907-2048x1365.jpg 2048w, https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/07\/California-0907-330x220.jpg 330w, https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/07\/California-0907-420x280.jpg 420w, https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/07\/California-0907-615x410.jpg 615w, https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/07\/California-0907-860x573.jpg 860w, https:\/\/weatheramerica.com\/us\/wp-content\/uploads\/sites\/2\/2025\/07\/California-0907-219x146.jpg 219w\" sizes=\"auto, (max-width: 2121px) 100vw, 2121px\" \/><\/p>\n<p><strong>Thursday<\/strong> is set to bring the <strong>peak of this week\u2019s heat wave<\/strong> across <strong>California<\/strong>, with <strong>triple-digit temperatures<\/strong> blanketing many <strong>interior regions<\/strong>. While this event won\u2019t go down as historic by <strong>California standards<\/strong>, it\u2019s shaping up to be an <strong>intense stretch of summer heat<\/strong> for many inland communities.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>A summer pattern sets the stage<\/strong><\/p>\n<p>Beginning <strong>Tuesday<\/strong>, a <strong>weak cutoff low<\/strong> that had kept <strong>cooler marine air<\/strong> over the <strong>Bay Area<\/strong> will retreat eastward. In its place, a <strong>broad ridge of high pressure<\/strong> will expand over the <strong>Desert Southwest<\/strong> and into <strong>Southern California<\/strong> through the week. Unlike more aggressive heat domes, this one behaves more like a <strong>slow-cooker<\/strong>, steadily intensifying heat without setting all-time records.<\/p>\n<p>The <strong>core of the heat<\/strong> will center on <strong>inland areas<\/strong>, with <strong>coastal zones<\/strong> remaining less predictable due to <strong>onshore flow<\/strong> and <strong>marine influence<\/strong>.<\/p>\n<h3><\/h3>\n<h3><strong>Where the heat will be most extreme<\/strong><\/h3>\n<p>From <strong>Wednesday through Friday<\/strong>, the <strong>hottest temperatures<\/strong> will grip the <strong>deserts and low-elevation valleys<\/strong> east of the <strong>San Jacinto<\/strong> and <strong>San Bernardino Mountains<\/strong> in <strong>Southern California<\/strong>. Cities like <strong>Palm Springs<\/strong>, <strong>Indio<\/strong>, and <strong>Blythe<\/strong> are forecast to soar between <strong>115\u00b0F and 120\u00b0F (46\u00b0C &#8211; 49\u00b0C)<\/strong>. <strong>Death Valley<\/strong> may <strong>top 120\u00b0F (49\u00b0C)<\/strong> on both <strong>Thursday<\/strong> and <strong>Friday<\/strong>, adding to its legacy as the hottest spot in <strong>North America<\/strong>.<\/p>\n<p>The <strong>Mojave Desert<\/strong> will follow closely, with places like <strong>Lancaster<\/strong>, <strong>Barstow<\/strong>, and <strong>Ridgecrest<\/strong> climbing into the <strong>105\u00b0F to 110\u00b0F (41\u00b0C &#8211; 43\u00b0C)<\/strong> range. In the <strong>Inland Empire<\/strong>, including <strong>Riverside<\/strong>, <strong>Ontario<\/strong>, and <strong>San Bernardino<\/strong>, expect highs near <strong>100\u00b0F (38\u00b0C)<\/strong>, especially on <strong>Wednesday<\/strong> and <strong>Thursday<\/strong>.<\/p>\n<p>Further west, the <strong>Los Angeles Basin<\/strong> will feel the warmth pressing in. Many neighborhoods will see temperatures in the <strong>upper 80s to mid-90s (31\u00b0C &#8211; 35\u00b0C)<\/strong> through <strong>Friday<\/strong>, while the <strong>coastline<\/strong>, including <strong>Santa Monica<\/strong> and <strong>Long Beach<\/strong>, will hover in the <strong>70s (21\u00b0C &#8211; 26\u00b0C)<\/strong> thanks to a <strong>cooler marine layer<\/strong>.<\/p>\n<h3><\/h3>\n<h3><strong>Central Valley heat intensifies<\/strong><\/h3>\n<p>The <strong>Central Valley<\/strong> knows heat well in <strong>July<\/strong>, but this week\u2019s prolonged surge will still pack a punch. From <strong>Bakersfield<\/strong> through <strong>Fresno<\/strong> and <strong>Stockton<\/strong>, expect highs to linger in the <strong>100\u00b0F to 105\u00b0F (38\u00b0C &#8211; 41\u00b0C)<\/strong> range between <strong>Wednesday<\/strong> and <strong>Friday<\/strong>.<\/p>\n<h3><\/h3>\n<h3><strong>Bay Area and Northern California remain shielded<\/strong><\/h3>\n<p><strong>Northern California<\/strong> won\u2019t see the brunt of this event. Some warmth will push west into the <strong>Salinas Valley<\/strong>, where highs may hit the <strong>90s (32\u00b0C &#8211; 37\u00b0C)<\/strong>. But farther north, <strong>marine air<\/strong> will cap temperature spikes. In the <strong>Bay Area<\/strong>, <strong>South Bay<\/strong> and <strong>East Bay<\/strong> valleys will warm into the <strong>90s (32\u00b0C &#8211; 34\u00b0C)<\/strong> midweek, while <strong>San Francisco<\/strong> and <strong>Oakland<\/strong> hold steady in the <strong>60s to 70s (16\u00b0C &#8211; 24\u00b0C)<\/strong> due to <strong>persistent onshore flow<\/strong>.<\/p>\n<h3><\/h3>\n<h3><strong>Tuesday\u2019s regional breakdown<\/strong><\/h3>\n<p><strong>San Francisco<\/strong> will begin <strong>Tuesday<\/strong> blanketed in <strong>thick morning clouds<\/strong>, especially on the <strong>west side<\/strong>. Neighborhoods like the <strong>Richmond<\/strong> and <strong>Sunset<\/strong> districts will stay cool, with highs in the <strong>upper 50s to low 60s (14\u00b0C &#8211; 17\u00b0C)<\/strong>. Areas like the <strong>Mission<\/strong> and <strong>downtown<\/strong> will see more sun, nudging temperatures into the <strong>mid-60s (18\u00b0C &#8211; 19\u00b0C)<\/strong>. Evening brings the return of <strong>low clouds<\/strong>, with overnight lows in the <strong>low to mid-50s (11\u00b0C &#8211; 13\u00b0C)<\/strong>.<\/p>\n<p>In the <strong>North Bay<\/strong>, morning <strong>stratus clouds<\/strong> will extend across cities like <strong>Napa<\/strong> and <strong>Vallejo<\/strong>, then retreat slowly inland. While the coast stays cool and gray, <strong>interior valleys<\/strong> like <strong>Santa Rosa<\/strong> will warm into the <strong>mid-70s (24\u00b0C)<\/strong>, with <strong>Vacaville<\/strong> climbing to the <strong>low 80s (27\u00b0C)<\/strong>. Overnight lows dip into the <strong>upper 40s to low 50s (9\u00b0C &#8211; 11\u00b0C)<\/strong>.<\/p>\n<p>Across the <strong>East Bay<\/strong>, from <strong>Berkeley<\/strong> to <strong>Oakland<\/strong>, <strong>clouds dominate early<\/strong> before breaking up late morning. Temperatures will stay mild, from the <strong>upper 60s to mid-70s (20\u00b0C &#8211; 24\u00b0C)<\/strong>. <strong>Tri-Valley<\/strong> cities such as <strong>Pleasanton<\/strong> and <strong>Livermore<\/strong> will reach the <strong>low 80s (27\u00b0C)<\/strong> under clearer skies. At night, <strong>marine stratus<\/strong> will return west of the <strong>Berkeley Hills<\/strong>, with lows between <strong>50\u00b0F and 55\u00b0F (10\u00b0C &#8211; 13\u00b0C)<\/strong>.<\/p>\n<p>The <strong>Pacific Coast<\/strong> and <strong>Peninsula<\/strong> will start out <strong>cloudy and cool<\/strong>, with slow clearing by afternoon. Places like <strong>Daly City<\/strong>, <strong>Pacifica<\/strong>, and <strong>Half Moon Bay<\/strong> will stay in the <strong>low 60s (16\u00b0C)<\/strong>. Farther inland, cities like <strong>Redwood City<\/strong> may touch the <strong>mid-70s (24\u00b0C)<\/strong>. Overnight lows will settle in the <strong>mid-50s (13\u00b0C)<\/strong>.<\/p>\n<p>In the <strong>South Bay<\/strong> and around <strong>Santa Cruz<\/strong>, expect <strong>sluggish morning clouds<\/strong>, especially near the coast. By afternoon, skies clear in places like <strong>San Jose<\/strong>, <strong>Santa Clara<\/strong>, and <strong>Cupertino<\/strong>, where highs rise into the <strong>mid-80s (29\u00b0C)<\/strong>. <strong>Santa Cruz\u2019s beaches<\/strong> will stay cooler in the <strong>low 70s (21\u00b0C)<\/strong>. Overnight, <strong>patchy low clouds<\/strong> will drift back inland, holding lows around the <strong>mid-50s (13\u00b0C)<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Thursday is set to bring the peak of this week\u2019s heat wave across California, with triple-digit temperatures blanketing many interior regions. While this event won\u2019t go down as historic by California standards, it\u2019s shaping up to be an intense stretch of summer heat for many inland communities. &nbsp; A summer pattern sets the stage Beginning [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":5650,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-5649","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 California: heat wave ramps up across inland valleys - 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\/07\/09\/weather-california-heat-wave-ramps-up-across-inland-valleys\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Weather California: heat wave ramps up across inland valleys - United States - Weather America\" \/>\n<meta property=\"og:description\" content=\"Thursday is set to bring the peak of this week\u2019s heat wave across California, with triple-digit temperatures blanketing many interior regions. 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