The Bay Area is expected to experience cooler temperatures today and Thursday. According to the National Weather Service in Sacramento, afternoon highs are forecast to be more than 10 degrees cooler than the previous day. This change is due to a closed low interacting with a trough from the Pacific Northwest, which will bring enhanced onshore winds starting later this morning.
Strong winds are expected in the Delta, with a 60-90% chance of gusts over 30 mph today. Inland areas could see gusts up to 25 mph, especially along the I-5 corridor from Woodland to Red Bluff. The National Weather Service also forecasts an increase in humidity as cooler, moister air moves in, offering brief relief from the usual dry conditions in the valley.
The brief cool weather will continue into Thursday with only a slight warm-up expected as high pressure builds in the Four Corners region. However, by the weekend, warmer and drier conditions will return, raising concerns about fire risks. By Friday, the weather will become hotter and drier, with humidity dropping to the teens and low 20s. The National Weather Service warns of increased fire danger as temperatures in the northern Sacramento Valley are expected to reach the mid-90s to triple digits.
Little change is expected for Saturday, with high temperatures similar to Friday, though the Delta may see a slight cooling. The National Weather Service predicts winds will return to a more typical daily pattern, and humidity will remain low. From Sunday to Wednesday, temperatures will rise as two high-pressure systems merge over Northern California, bringing slightly above-normal heat. A minor cooldown is expected on Wednesday as a trough passes from the north. During this time, residents should prepare for periods of elevated fire risk due to occasional gusty northerly and easterly winds from Sunday through Tuesday.
The National Weather Service confirms that VFR (Visual Flight Rules) conditions will prevail across interior Northern California for the next 24 hours. Surface winds will generally stay below 12 knots, except near the Delta, where stronger southwestern winds of 15–25 knots will continue. As Northern Californians face changing autumn weather, they should be prepared for fluctuating winds and temperatures.
