5-day weather forecast San Francisco 27-08-2026

Weather forecast San Francisco tomorrow 27.08.2026: overcast, temperature from 16 °C to 20 °C.

Precipitation probability 23%. Wind up to 5.31 m/s (gusts 7.5 m/s). Air humidity 67–86%, atmospheric pressure 760–761 mm Hg, UV index up to 8.7.

Sunrise 06:35
Sunset 19:46
Full Moon100% illuminated
Moonrise 19:43 · Moonset 06:16
Chart
Table

Forecast from 16 °C to 20 °C and precipitation

Temperature & Precipitation
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Temperature (°C)171717171717171617171818181717192019191817171616
Precipitation (mm/hr)000000000000000000000000

Cloud cover and precipitation probability

Cloud cover & Rain chance
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Cloud cover (%)000040000598981001009293945567100100100100100
Rain chance (%)10101111121111111092121212323171610131920212222

Wind speed and direction

Wind & Wind gust
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Wind (m/s)2.892.611.891.51.191.391.691.611.611.812.8133.894.1954.555.315.114.6944.694.394.39
Wind gust (m/s)5.114.693.923.222.812.422.142.1422.253.033.334.365.197.226.817.57.427.4276.696.536.426.22
Wind direction (°)WNW 286°WNW 289°WNW 288°W 268°W 270°WSW 249°W 262°W 267°W 264°WSW 245°WSW 243°WSW 253°WSW 256°WSW 253°W 265°W 266°W 274°W 268°W 275°W 265°W 260°WSW 241°WSW 245°WSW 254°

Air humidity

Humidity
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Humidity (%)828484858686868683787676768081716768707273757677

Atmospheric pressure

Pressure
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
Pressure (mm Hg)761761761761760761761761761761761761761761761761760761761761761761761761

Ultraviolet index

UV Index
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
UV Index000000000.61.83.86.17.98.78.36.74.52.30.90.20000

Air quality & pollen

Air quality
Time00:0001:0002:0003:0004:0005:0006:0007:0008:0009:0010:0011:0012:0013:0014:0015:0016:0017:0018:0019:0020:0021:0022:0023:00
PM2.5 (µg/m³)65.55.25.14.94.84.84.84.74.64.855.35.76.36.87.27.67.88.18.48.68.89
PM10 (µg/m³)8.57.676.96.86.86.86.76.66.56.76.97.48.19.210.110.711.411.712.212.712.913.213.6
Ozone (O₃) (µg/m³)242729303131323233343638414547474645434240393938
NO₂ (µg/m³)13.711.49.58.68.17.676.4666.26.35.95.3555.367.59.410.811.110.810.5
SO₂ (µg/m³)0.60.50.50.50.60.60.60.70.70.70.80.80.80.80.80.80.70.70.70.70.70.70.80.8
CO (µg/m³)1261151071029998101106110110109107106104103102102104111120127129129127

San Francisco on the map

Data Sources & Methodology

Our weather forecasts are powered by a professional weather data provider that aggregates data from national weather services, satellite observations, radar networks, and over 80,000 weather stations worldwide. Forecast data is updated multiple times daily. We convert raw data into clear summaries — wind speed in m/s, pressure in mmHg — so you can plan your day with confidence.