Excessive Heat Warning — Indian Wells Valley, CA, Mojave Desert Slopes, CA, Mojave Desert, CA, Coalinga - Avenal, CA, West Side of Fresno and Kings Counties, CA, Caruthers - San Joaquin - Selma, CA, Fresno-Clovis, CA, West Side Mountains South of 198, CA, Buttonwillow - Lost Hills - I5, CA, Delano-Wasco-Shafter, CA, Hanford - Corcoran - Lemoore, CA, Visalia - Porterville - Reedley, CA, Buena Vista, CA, Bakersfield, CA, Southeast San Joaquin Valley, CA, South End San Joaquin Valley, CA 1:00 AM

San Francisco, California

Last updated: 7:19 AM CDT  ·  Refresh
15°C
Feels like 14°
Mostly Cloudy
▲ 22°  /  ▼ 14°
Wind
8 mph W
Humidity
93%
Dew Point
14°
Pressure
29.93 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
84%
Sunrise
6:33 AM
Sunset
7:48 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: San Francisco is currently mostly cloudy at 15°C. Dry conditions are expected through the next 24 hours. Sunrise: 6:33AM · Sunset: 7:48PM.

Alerts

Excessive Heat Warning
Indian Wells Valley, CA, Mojave Desert Slopes, CA, Mojave Desert, CA, Coalinga - Avenal, CA, West Side of Fresno and Kings Counties, CA, Caruthers - San Joaquin - Selma, CA, Fresno-Clovis, CA, West Side Mountains South of 198, CA, Buttonwillow - Lost Hills - I5, CA, Delano-Wasco-Shafter, CA, Hanford - Corcoran - Lemoore, CA, Visalia - Porterville - Reedley, CA, Buena Vista, CA, Bakersfield, CA, Southeast San Joaquin Valley, CA, South End San Joaquin Valley, CA
Expires 1:00 AM
27 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
15°
3%
6 AM
14°
3%
7 AM
14°
3%
8 AM
15°
3%
9 AM
16°
3%
10 AM
16°
3%
11 AM
17°
3%
12 PM
17°
3%
1 PM
21°
3%
2 PM
21°
3%
3 PM
21°
3%
4 PM
21°
3%
5 PM
21°
3%
6 PM
20°
3%
7 PM
19°
3%
8 PM
19°
3%
9 PM
17°
3%
10 PM
17°
7%
11 PM
17°
6%
12 AM
16°
6%
1 AM
16°
6%
2 AM
15°
6%
3 AM
15°
6%
4 AM
15°
6%
7-Day Forecast
Today
22° 14°
Mostly Cloudy.
Wed
23° 14°
Mostly Clear.
Thu
24° 15°
Partly Cloudy.
Fri
22° 13°
Overcast.
Sat
22° 14°
Partly Cloudy.
Sun
21° 13°
Partly Cloudy.
Mon
21° 13°
Mostly Cloudy.
TimeTempConditionsPrecipWindHumidity
Now 15° Mostly Cloudy 3% 8 mph W 93%
6 AM 14° Mostly Cloudy 3% 9 mph W 92%
7 AM 14° Mostly Cloudy 3% 9 mph W 91%
8 AM 15° Mostly Cloudy 3% 9 mph W 89%
9 AM 16° Mostly Cloudy 3% 9 mph W 86%
10 AM 16° Mostly Cloudy 3% 9 mph W 83%
11 AM 17° Mostly Cloudy 3% 9 mph W 79%
12 PM 17° Mostly Cloudy 3% 10 mph W 76%
1 PM 21° Mostly Cloudy 3% 11 mph W 74%
2 PM 21° Mostly Cloudy 3% 12 mph W 72%
3 PM 21° Mostly Cloudy 3% 13 mph W 72%
4 PM 21° Mostly Cloudy 3% 14 mph W 71%
5 PM 21° Mostly Cloudy 3% 13 mph W 72%
6 PM 20° Mostly Cloudy 3% 12 mph W 74%
7 PM 19° Mostly Cloudy 3% 11 mph W 77%
8 PM 19° Mostly Cloudy 3% 10 mph W 80%
9 PM 17° Mostly Cloudy 3% 9 mph WSW 83%
10 PM 17° Mostly Cloudy 7% 9 mph WSW 86%
11 PM 17° Mostly Cloudy 6% 9 mph WSW 88%
12 AM 16° Mostly Cloudy 6% 8 mph WSW 89%
1 AM 16° Mostly Cloudy 6% 7 mph WSW 89%
2 AM 15° Partly Cloudy 6% 7 mph WSW 90%
3 AM 15° Mostly Cloudy 6% 6 mph WSW 90%
4 AM 15° Haze 6% 6 mph WSW 89%
15-Day Forecast
Today
8/25
Mostly Cloudy
6%
14°
22°
Wed
8/26
Mostly Clear
6%
14°
23°
Thu
8/27
Partly Cloudy
3%
15°
24°
Fri
8/28
Overcast
3%
13°
22°
Sat
8/29
Partly Cloudy
3%
14°
22°
Sun
8/30
Partly Cloudy
5%
13°
21°
Mon
8/31
Mostly Cloudy
9%
13°
21°
Tue
9/1
Mostly Clear
18%
13°
22°
Wed
9/2
Drizzle
50%
13°
23°
Thu
9/3
Clear
21%
14°
26°
Fri
9/4
Drizzle
60%
14°
29°
Sat
9/5
Drizzle
60%
14°
27°
Sun
9/6
Clear
3%
15°
28°
Mon
9/7
Clear
3%
15°
28°
Tue
9/8
Clear
3%
14°
28°
27
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
27 AQI 4.9 µg/m³
O3
Ground-level ozone
21 AQI 24 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Wed 27 Good 21 27
Thu 32 Good 19 32
Fri 22 Good 17 22
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 Tue Aug 25, 11:00'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
MLCAPE51 J/kg
MUCAPE0 J/kg
SBCIN—
MLCIN0 J/kg
Lifted Index10.5
Kinematics
0–6 km Shear24 kt
0–1 km Shear2 kt
Eff. Shear—
0–1 km SRH9
0–3 km SRH110
Eff. SRH—
Storm Motion257° @ 26 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index18.3
Thermo & Levels
PWAT1.08 in
0–3 km LR1.8 °C/km
700–500 LR6.5 °C/km
Total Totals39.2
LCL998 hPa
LFC—
EL—
Freezing Lvl14,934 ft