San Jose woke up today to clear skies and crisp morning air, with temperatures near 55°F at Mineta San Jose International Airport. The valley is set to warm quickly this afternoon, with inland highs topping out around 75–77°F, before a Pacific system rolls in and brings widespread rain from tomorrow through midweek. A higher risk of thunderstorms is expected on Tuesday, as the main frontal band moves through.
Afternoon Sunshine, Warm Valley Highs
Skies stay mostly sunny this afternoon, with light south-southwest breezes around 1–9 mph and low humidity keeping things comfortable for outdoor plans. Inland neighborhoods will feel the warmest, while coastal spots will run noticeably cooler, so grab a light layer if you are heading toward the water.
Monday–Wednesday: Rain, Gusts, And Thunder
Rain becomes likely tomorrow and continues steadily through Tuesday, with isolated to scattered thunderstorms possible in the afternoon. According to the National Weather Service, rain tomorrow should stay on the lighter side, but tomorrow night could deliver about a half to three-quarters of an inch, with another quarter to half an inch possible Tuesday. Combined totals may reach roughly 0.5–1.5 inches in the valleys and 1.5–3 inches in the coastal ranges. South winds could gust to 22 mph during the frontal passage, so look for wet roads and slower commutes when the heavier downpours pass through.
Marine And Commute Notes
Boaters should be aware of small craft advisories around Monterey Bay for tomorrow, with seas expected to turn choppy as southerly winds develop. The National Weather Service warns that minor nuisance flooding is possible in urban and low-lying areas with poor drainage if heavy rain showers or thunderstorms develop. Give yourself extra commute time, secure loose outdoor items, and skip driving through pooled or flooded streets, no matter how tempting the shortcut looks.
