San Francisco, California

Last updated: 4:59 AM CDT  ·  Refresh
17°C
Feels like 15°
Mostly Cloudy
▲ 20°  /  ▼ 14°
Wind
11 mph SW
Humidity
94%
Dew Point
16°
Pressure
29.84 inHg
Visibility
8 mi
UV Index
0.0
Cloud Cover
66%
Sunrise
6:04 AM
Sunset
8:27 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: San Francisco is currently mostly cloudy at 17°C. Dry conditions are expected through the next 24 hours. Sunrise: 6:04AM · Sunset: 8:27PM.

Alerts

No active alerts for this location.
36 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
17°
6%
3 AM
17°
9%
4 AM
16°
9%
5 AM
17°
18%
6 AM
17°
18%
7 AM
17°
17%
8 AM
17°
19%
9 AM
18°
17%
10 AM
18°
17%
11 AM
18°
17%
12 PM
18°
17%
1 PM
20°
16%
2 PM
20°
4%
3 PM
20°
4%
4 PM
20°
4%
5 PM
18°
4%
6 PM
18°
8%
7 PM
18°
6%
8 PM
17°
6%
9 PM
16°
6%
10 PM
16°
6%
11 PM
16°
6%
12 AM
15°
6%
1 AM
14°
6%
7-Day Forecast
Today
20° 14°
Fog.
Thu
21° 14°
Mostly Cloudy.
Fri
21° 14°
Partly Cloudy.
Sat
22° 14°
Overcast.
Sun
23° 14°
Partly Cloudy.
Mon
23° 14°
Clear.
Tue
22° 14°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 17° Mostly Cloudy 6% 11 mph SW 94%
3 AM 17° Overcast 9% 12 mph SW 94%
4 AM 16° Fog 9% 12 mph SW 94%
5 AM 17° Fog 18% 12 mph SW 94%
6 AM 17° Overcast 18% 12 mph SSW 93%
7 AM 17° Fog 17% 11 mph SSW 93%
8 AM 17° Fog 19% 11 mph SSW 91%
9 AM 18° Mostly Cloudy 17% 12 mph SW 90%
10 AM 18° Mostly Cloudy 17% 12 mph SW 89%
11 AM 18° Mostly Cloudy 17% 12 mph SW 88%
12 PM 18° Mostly Cloudy 17% 12 mph SW 88%
1 PM 20° Fog 16% 12 mph WSW 87%
2 PM 20° Partly Cloudy 4% 12 mph WSW 84%
3 PM 20° Partly Cloudy 4% 12 mph WSW 84%
4 PM 20° Partly Cloudy 4% 12 mph W 84%
5 PM 18° Partly Cloudy 4% 12 mph W 87%
6 PM 18° Partly Cloudy 8% 12 mph W 88%
7 PM 18° Partly Cloudy 6% 12 mph W 89%
8 PM 17° Partly Cloudy 6% 11 mph W 92%
9 PM 16° Partly Cloudy 6% 10 mph W 94%
10 PM 16° Partly Cloudy 6% 9 mph W 95%
11 PM 16° Mostly Cloudy 6% 9 mph W 96%
12 AM 15° Mostly Cloudy 6% 9 mph W 96%
1 AM 14° Fog 6% 9 mph W 96%
15-Day Forecast
Today
7/22
Fog
19%
14°
20°
Thu
7/23
Mostly Cloudy
19%
14°
21°
Fri
7/24
Partly Cloudy
6%
14°
21°
Sat
7/25
Overcast
3%
14°
22°
Sun
7/26
Partly Cloudy
3%
14°
23°
Mon
7/27
Clear
3%
14°
23°
Tue
7/28
Clear
3%
14°
22°
Wed
7/29
Clear
3%
14°
22°
Thu
7/30
Partly Cloudy
3%
14°
22°
Fri
7/31
Clear
3%
14°
24°
Sat
8/1
Clear
3%
14°
28°
Sun
8/2
Clear
3%
14°
27°
Mon
8/3
Clear
3%
14°
27°
Tue
8/4
Clear
3%
14°
27°
Wed
8/5
Clear
3%
15°
28°
36
Good
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
36 AQI 6.4 µg/m³
O3
Ground-level ozone
31 AQI 35 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 36 Good 31 36
Thu 27 Good 24 27
Fri 24 Good 24 21
About the Air Quality Index
0–50 Good
51–100 Moderate
101–150 Unhealthy for Sensitive Groups
151–200 Unhealthy
201–300 Very Unhealthy
301–500 Hazardous

The U.S. AQI runs 0–500. The overall value equals the highest individual pollutant sub-index, and the dominant pollutant is the one driving it. PM2.5 (fine particles) is reported in µg/m³ and ozone (O3) in ppb. Forecast source: NWS NAQFC.

1000850700500400300250200150100 -40-30-20-10010203040 0.41247101624 LCL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Wed Jul 22, 08:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE0 J/kg
MLCAPE20 J/kg
MUCAPE0 J/kg
SBCIN-11282 J/kg
MLCIN0 J/kg
Lifted Index11.0
Kinematics
0–6 km Shear22 kt
0–1 km Shear21 kt
Eff. Shear—
0–1 km SRH-89
0–3 km SRH-95
Eff. SRH—
Storm Motion158° @ 31 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado-0.0
STP (eff)—
Supercell—
K-Index3.5
Thermo & Levels
PWAT0.97 in
0–3 km LR1.7 °C/km
700–500 LR5.9 °C/km
Total Totals34.6
LCL997 hPa
LFC—
EL—
Freezing Lvl17,070 ft