11-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Night
Light rain
15°
Feels like 15°
Wind↑ SSE 16 km/h
Gusts32 km/h
Humidity 88 %
💧 1.8 mm
Afternoon
Rain
16°
Feels like 16°
Wind↑ S 41 km/h
Gusts64 km/h
Humidity 87 %
💧 5.8 mm
12-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Night
Rain
16°
Feels like 16°
Wind↑ WSW 25 km/h
Gusts37 km/h
Humidity 75 %
💧 5.9 mm
Afternoon
Rain showers
16°
Feels like 16°
Wind↑ WSW 32 km/h
Gusts40 km/h
Humidity 77 %
💧 2.0 mm
13-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Night
Rain showers
14°
Feels like 14°
Wind↑ WNW 10 km/h
Gusts16 km/h
Humidity 76 %
💧 0.5 mm
Afternoon
Clear sky
16°
Feels like 16°
Wind↑ SW 13 km/h
Humidity 68 %
14-day outlook — past day 10 this is an outlook from the end of the GFS run: expect differences of several degrees.
Night
Rain
12°
Feels like 12°
Wind↑ W 22 km/h
Gusts30 km/h
Humidity 70 %
💧 10.4 mm
San Francisco forecast in charts · next 7 days
The week ahead: highs and lows
≈ A week close to the usual temperatures
Highs Lows Usual for the season (1991–2020 average)
Hourly detail
Temperature (°C) Rain (mm) Wind (km/h)
San Francisco climate: what a normal year looks like
The wet season is concentrated from December to February, which brings 58% of the annual total; February by itself averages 105 mm.
A normal year brings roughly 520 mm of rain — less than 86% of the towns of 20,000+ people we compared it with.
The hottest stretch is September, when afternoons average 25 °C; the coldest is January, when nights average 6 °C.
From 14 h 46 min of daylight in late June to 9 h 32 min in late December.
Forecast highs for the coming week average 17 °C, 5 °C cooler than a normal October (22 °C).
30-year averages (1991–2020)
Month
Typical high
Typical low
Rainfall
Jan
14 °C
6 °C
100 mm
Feb
16 °C
8 °C
105 mm
Mar
16 °C
9 °C
79 mm
Apr
18 °C
9 °C
38 mm
May
20 °C
11 °C
20 mm
Jun
23 °C
12 °C
5 mm
Jul
24 °C
13 °C
1 mm
Aug
24 °C
14 °C
1 mm
Sep
25 °C
13 °C
2 mm
Oct
22 °C
12 °C
23 mm
Nov
18 °C
9 °C
50 mm
Dec
14 °C
6 °C
95 mm
Whole year
19 °C
10 °C
520 mm
Source: our own processing of the ERA5 reanalysis (Copernicus/ECMWF) for 37.77° N, 122.42° W, 1991–2020. ERA5 averages over a 0.25° grid (about 25 km): hills, a coastline or the heat of the city itself can shift local values by a degree or two.
Air you breathe in San Francisco: pollution and pollen
1/6
Good
European Air Quality Index (EAQI), from Copernicus CAMS
PM2.59µg/m³
PM1011µg/m³
Copernicus CAMS model, updated several times a day.
Rain radar around San Francisco
Rain observed over the last two hours by official weather radars around San Francisco, followed by the radar forecast for the next hour where the weather service provides one.
Rain radarLast two hours, then forecast where available · drag the timeline
Moon over San Francisco
Waning gibbous
87 % illuminated · 18.3 days
Rise 22:48 Set 13:49
Fri30/1079%
Sat31/1069%
Sun1/1159%
Mon2/1149%Last quarter
Tue3/1138%
Wed4/1128%
Thu5/1119%
Fri6/1112%
Sat7/116%
Sun8/112%
Mon9/110%
Tue10/111%New moon
Moonrise and moonset in local time (America/Los_Angeles); phase and lit fraction from a synodic calculation.
Look up a past day in San Francisco
Curious about the weather in San Francisco on a given day? Choose a date: we read it from the ERA5 reanalysis (ECMWF / Copernicus C3S), which runs until about a week ago.
San Francisco weather at a glance
This page gathers everything about the weather in San Francisco, California: conditions now, the forecast for each part of the day and the trend for the coming week. At the moment the sky is “partly cloudy”, it is 15 °C (feels like 15 °C) and the wind blows at 7 km/h.
Expected range today: 12 °C to 17 °C and a dry sky. The forecast comes from the AtmoAtlas engine, which combines ECMWF-AIFS, NOAA GFS and DWD ICON, adjusts cloud cover with METAR reports and uses convective energy (CAPE) to flag storms.
Use the San Francisco forecast in your own website or app: one JSON call returns weather, air quality, tides and sun and moon times. The free key needs no card.
