San Francisco is getting a drippy wake-up call this morning, with light, spotty rain, muggy air, and mostly cloudy skies keeping temperatures stuck in the upper 50s to low 60s. Patchy fog and mist in low-lying neighborhoods could trim visibility for the Wednesday commute, especially on slower-to-clear routes. The damp start will not last all day, though, with showers fading and a warmer, drier stretch lining up for the back half of the week.
Morning Rain And Patchy Fog
Most neighborhoods will only deal with brief, light showers this morning, while southeast-facing coastal slopes and the Berkeley Hills could quietly squeeze out a tenth to a quarter inch of rain in isolated spots. The National Weather Service calls this the tail end of a moisture plume and expects overall rainfall totals to stay small, with no watches or warnings posted for the city right now. Fog and mist may reduce visibility in parts of the North and South Bay through mid-morning, so plan for slower driving in those corridors.
Warmer, Drier Through Friday
Once the shower threat winds down, highs should climb into the mid-60s today and then warm into the upper 60s to around 70 by Friday in many inland neighborhoods. Light north-to-northwest breezes will keep the waterfront on the cooler side, while inland valleys soak up most of the warmth. Overnight lows hold fairly steady in the low to mid 50s.
Weekend Watch
Looking toward the back end of the weekend, there is a small chance late Sunday into Monday that a cutoff low passing near the northern coast will toss a few light showers at the coastal ranges and the North Bay. Forecasters say the odds of anything significant are low, and ensemble guidance keeps the probability of more than a half inch of rain in 24 hours well under 10% for most local spots. For background on the larger midweek system and regional impacts, see our earlier coverage of the midweek soaker.
What To Do
A compact umbrella or light rain jacket is still a smart bet for the morning commute, and it is worth leaving a little early where fog could slow things down. If you have evening or weekend plans, keep an eye on updates from the National Weather Service and your transit provider before you head out. Expect mainly dry afternoons through Friday, then monitor the forecast through Sunday in case that weak system squeezes out a bit more rain.
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