San Francisco, California

Last updated: 3:57 PM CDT  ·  Refresh
17°C
Feels like 15°
Partly Cloudy
▲ 22°  /  ▼ 14°
Wind
10 mph W
Humidity
75%
Dew Point
13°
Pressure
29.82 inHg
Visibility
9 mi
UV Index
9.0
Cloud Cover
37%
Sunrise
6:15 AM
Sunset
8:13 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: San Francisco is currently partly cloudy at 17°C. Dry conditions are expected through the next 24 hours. Sunrise: 6:15AM · Sunset: 8:13PM.

Alerts

No active alerts for this location.
55 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
17°
7%
2 PM
20°
3%
3 PM
20°
3%
4 PM
19°
3%
5 PM
19°
3%
6 PM
18°
14%
7 PM
18°
16%
8 PM
17°
16%
9 PM
16°
16%
10 PM
16°
17%
11 PM
16°
17%
12 AM
16°
6%
1 AM
15°
6%
2 AM
15°
6%
3 AM
15°
17%
4 AM
15°
17%
5 AM
14°
17%
6 AM
14°
17%
7 AM
14°
17%
8 AM
15°
17%
9 AM
18°
7%
10 AM
18°
7%
11 AM
18°
7%
12 PM
18°
7%
7-Day Forecast
Today
22° 14°
Partly Cloudy.
Thu
21° 13°
Partly Cloudy.
Fri
23° 13°
Mostly Cloudy.
Sat
24° 12°
Fog.
Sun
29° 16°
Clear.
Mon
27° 15°
Clear.
Tue
27° 15°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 17° Partly Cloudy 7% 10 mph W 75%
2 PM 20° Mostly Clear 3% 12 mph W 72%
3 PM 20° Mostly Clear 3% 12 mph W 74%
4 PM 19° Mostly Clear 3% 12 mph W 76%
5 PM 19° Partly Cloudy 3% 12 mph W 80%
6 PM 18° Partly Cloudy 14% 11 mph W 84%
7 PM 18° Partly Cloudy 16% 10 mph W 87%
8 PM 17° Haze 16% 9 mph W 89%
9 PM 16° Fog 16% 8 mph W 90%
10 PM 16° Fog 17% 8 mph WSW 91%
11 PM 16° Haze 17% 7 mph WSW 92%
12 AM 16° Fog 6% 6 mph WSW 92%
1 AM 15° Mostly Cloudy 6% 6 mph WSW 93%
2 AM 15° Mostly Cloudy 6% 6 mph WSW 93%
3 AM 15° Mostly Cloudy 17% 5 mph WSW 93%
4 AM 15° Mostly Cloudy 17% 5 mph WSW 93%
5 AM 14° Mostly Cloudy 17% 5 mph WSW 93%
6 AM 14° Mostly Cloudy 17% 5 mph WSW 92%
7 AM 14° Mostly Cloudy 17% 4 mph WSW 91%
8 AM 15° Mostly Cloudy 17% 5 mph WSW 89%
9 AM 18° Mostly Cloudy 7% 5 mph WSW 86%
10 AM 18° Partly Cloudy 7% 5 mph WSW 84%
11 AM 18° Partly Cloudy 7% 6 mph WSW 84%
12 PM 18° Partly Cloudy 7% 7 mph WSW 83%
15-Day Forecast
Today
8/5
Partly Cloudy
17%
14°
22°
Thu
8/6
Partly Cloudy
17%
13°
21°
Fri
8/7
Mostly Cloudy
8%
13°
23°
Sat
8/8
Fog
17%
12°
24°
Sun
8/9
Clear
3%
16°
29°
Mon
8/10
Clear
3%
15°
27°
Tue
8/11
Clear
3%
15°
27°
Wed
8/12
Clear
3%
15°
27°
Thu
8/13
Clear
3%
15°
26°
Fri
8/14
Clear
3%
14°
25°
Sat
8/15
Clear
3%
14°
27°
Sun
8/16
Clear
3%
14°
27°
Mon
8/17
Clear
3%
13°
27°
Tue
8/18
Clear
25%
13°
27°
Wed
8/19
Clear
25%
14°
27°
55
Moderate
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
55 AQI 11.5 µg/m³
O3
Ground-level ozone
22 AQI 25 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Thu 55 Moderate 22 55
Fri 71 Moderate 27 71
Sat 69 Moderate 28 69
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 Aug 5, 18:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE0 J/kg
MLCAPE35 J/kg
MUCAPE0 J/kg
SBCIN-13074 J/kg
MLCIN0 J/kg
Lifted Index13.9
Kinematics
0–6 km Shear7 kt
0–1 km Shear14 kt
Eff. Shear—
0–1 km SRH-54
0–3 km SRH-47
Eff. SRH—
Storm Motion57° @ 6 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado-0.0
STP (eff)—
Supercell—
K-Index-16.0
Thermo & Levels
PWAT0.73 in
0–3 km LR0.2 °C/km
700–500 LR7.3 °C/km
Total Totals23.7
LCL948 hPa
LFC—
EL—
Freezing Lvl17,192 ft