Weather report 18 October 2026, 12:00

San Francisco is turning markedly cooler after the warm weekend: temperatures sit at 16–17°C around midday, then fall to about 13°C by early evening. Westerly winds strengthen too, with gusts of up to 43 km/h between 15:00 and 19:00, so a windproof jacket will help on exposed routes. No rain is expected before midnight.

The night stays dry, and the westerly wind eases after midnight. The temperature falls to 12°C.

Monday morning starts at 11–12°C in San Francisco and reaches 16–17°C by midday. No rain is expected before 12:00, and the westerly wind remains noticeable but weaker than today.

Tuesday turns milder and mostly sunny at 19°C. Rain is signalled for Wednesday, with around 10 mm in the current forecast, and Thursday brings only a few showers. By the weekend the thermometer climbs back to 23°C.

The model history shows a short, very warm spell in San Francisco: around 29°C on Thursday, 30°C on Friday and 28°C on Saturday. There was no run of at least three days at 30°C; only Friday reached that mark. The shift to highs of around 17°C is correspondingly sharp, and Wednesday's rain looks like the first real change in the pattern.

Westerly to west-southwesterly winds run at 25–30 km/h on Sunday afternoon, with gusts of up to 44 km/h between 15:00 and 19:00. The gusts will be noticeable on exposed roads and bridges, especially for cyclists and high-sided vehicles.