Weather report 18 October 2026, 18:00

Sunday in San Francisco ends cool and windy: by evening temperatures sit near 14 °C and westerly gusts reach around 43 km/h. No rain is expected before midnight.

Overnight it turns cooler at 11–12 °C, with thick cloud at first. The westerly wind gradually eases.

Monday begins in San Francisco with lingering cloud and 12 °C; by midday the sun breaks through and temperatures rise to 16–17 °C. There is no rain window, though the westerly wind stays noticeable with gusts up to 39 km/h.

Tuesday will be brighter at 19 °C and much less windy. Wednesday turns wet, with around 15 mm of rain and only four hours of sunshine. After that it warms up: 18 °C on Thursday, 20 °C on Friday and up to 24 °C on Saturday.

The model data show 30.1 °C for Friday, while 18.2 °C is calculated for today – a sharp drop in temperature. There was no three-day run at or above 30 °C: only Friday reached 30 °C, with Saturday below at 28.0 °C. Monday remains cool at 17 °C, before rain arrives on Wednesday and warmer values return at the weekend.

On Monday the wind blows from west to west-southwest at 18–23 km/h, gusting to 39 km/h; it is strongest in the morning. Expect crosswinds on bridges and exposed routes.