San Jose eased into clear skies and crisp air today, with Mineta San José International starting the day near 46°F. The city gets one more mostly sunny day, with a high near 67°F, before a more unsettled pattern muscles in later in the week.
Afternoon, Tonight, And Monday
Light south winds this afternoon will help nudge temperatures into the mid to upper 60s, then readings slip a few degrees toward evening as the air cools. Tonight, patchy fog is expected to develop after about 11 PM, while lows drop into the low 40s.
Tomorrow begins on a gray note, with pockets of morning fog that should burn off gradually. By afternoon, San Jose is looking at mostly sunny skies again and highs near 70°F, a brief warm-up before the wet weather arrives.
Tuesday Into Wednesday: Heaviest Rain Possible
The pattern flips tomorrow night into Tuesday as a Pacific low steers a plume of subtropical moisture into Northern California. A chance of light rain arrives late Monday night, and rain becomes likely on Tuesday with periods of steady showers. New rainfall totals of roughly a tenth to a quarter of an inch are expected in many urban spots, while the North Bay and coastal slopes could see locally higher amounts.
Forecasters warn that the very moist plume could lead to ponding on roads and shallow landslides on already saturated slopes, according to the National Weather Service San Francisco, its Area Forecast Discussion, and reporting from the San Francisco Chronicle.
Impacts And Commute
Drivers should plan for slick roads and slower travel on Tuesday morning, avoid driving through standing water, and build in extra time for the commute. Boat operators and shoreline visitors are urged to keep an eye on small-craft advisories and peak-tide timing, while residents in low-lying North Bay neighborhoods should be ready for brief urban flooding or ponding.
