San Francisco, California

Last updated: 10:39 PM CDT · Refresh

19°C

Feels like 18°

Partly Cloudy

▲ 22° / ▼ 14°

Wind

10 mph W

Humidity

85%

Dew Point

14°

Pressure

29.79 inHg

Visibility

10 mi

UV Index

0.0

Cloud Cover

43%

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 partly cloudy at 19°C. Dry conditions are expected through the next 24 hours. Sunrise: 6:04AM · Sunset: 8:27PM.

36 AQI · Good Dominant: PM2.5 Air Quality

Hourly Forecast · Next 24 Hours

Now

19°

9 PM

18°

10 PM

18°

11 PM

18°

12 AM

17°

1 AM

17°

2 AM

17°

14%

3 AM

17°

11%

4 AM

17°

11%

5 AM

17°

24%

6 AM

17°

32%

7 AM

17°

32%

8 AM

17°

29%

9 AM

17°

29%

10 AM

18°

18%

11 AM

18°

12 PM

18°

1 PM

20°

2 PM

20°

3 PM

20°

4 PM

20°

5 PM

18°

6 PM

18°

7 PM

18°

7-Day Forecast

Tonight

22° 14°

Fog.

Wed

22° 14°

Mostly Cloudy with a 29% chance of rain.

Thu

21° 14°

Haze.

Fri

21° 14°

Haze.

Sat

23° 14°

Overcast.

Sun

23° 14°

Clear.

Mon

23° 14°

Clear.

+ Feels like

TimeTempConditionsPrecipWindHumidity

Now 19° Partly Cloudy 4% 10 mph W 85%

9 PM 18° Mostly Cloudy 5% 11 mph WSW 90%

10 PM 18° Mostly Cloudy 6% 11 mph WSW 94%

11 PM 18° Fog 6% 11 mph WSW 94%

12 AM 17° Fog 7% 11 mph SW 94%

1 AM 17° Fog 8% 11 mph SW 94%

2 AM 17° Fog 14% 11 mph SW 94%

3 AM 17° Fog 11% 11 mph SW 94%

4 AM 17° Fog 11% 10 mph SW 94%

5 AM 17° Fog 24% 10 mph SW 94%

6 AM 17° Fog 32% 10 mph SW 93%

7 AM 17° Fog 32% 10 mph SW 93%

8 AM 17° Overcast 29% 10 mph SW 92%

9 AM 17° Mostly Cloudy 29% 11 mph SW 91%

10 AM 18° Mostly Cloudy 18% 12 mph SW 89%

11 AM 18° Mostly Cloudy 7% 12 mph SW 88%

12 PM 18° Mostly Cloudy 7% 12 mph WSW 86%

1 PM 20° Mostly Cloudy 7% 12 mph WSW 85%

2 PM 20° Mostly Cloudy 7% 12 mph WSW 85%

3 PM 20° Mostly Cloudy 3% 12 mph WSW 84%

4 PM 20° Partly Cloudy 3% 12 mph W 84%

5 PM 18° Partly Cloudy 3% 12 mph W 85%

6 PM 18° Partly Cloudy 3% 12 mph W 86%

7 PM 18° Partly Cloudy 3% 12 mph W 87%

15-Day Forecast

Today

7/21

Fog

14°

22°

Wed

7/22

Mostly Cloudy

29%

14°

22°

Thu

7/23

Haze

14°

21°

Fri

7/24

Haze

14°

21°

Sat

7/25

Overcast

14°

23°

Sun

7/26

Clear

14°

23°

Mon

7/27

Clear

14°

23°

Tue

7/28

Clear

14°

23°

Wed

7/29

Clear

14°

22°

Thu

7/30

Clear

19%

14°

23°

Fri

7/31

Clear

14°

25°

Sat

8/1

Clear

14°

27°

Sun

8/2

Clear

14°

27°

Mon

8/3

Clear

14°

27°

Tue

8/4

Clear

14°

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

PM_2.5

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. PM_2.5 (fine particles) is reported in µg/m³ and ozone (O₃) in ppb. Forecast source: NWS NAQFC.

Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio

RAP

Valid Wed Jul 22, 02:00'Z' · F0 · 130 (13 km CONUS/NA)

Hodograph · kt

0–1 1–3 3–6 6–9 km

Instability

SBCAPE0 J/kg

MLCAPE23 J/kg

MUCAPE0 J/kg

SBCIN-11818 J/kg

MLCIN0 J/kg

Lifted Index11.6

Kinematics

0–6 km Shear24 kt

0–1 km Shear19 kt

Eff. Shear—

0–1 km SRH-79

0–3 km SRH-86

Eff. SRH—

Storm Motion150° @ 24 kt

0–1 km EHI-0.0

Composite Parameters

Sig. Tornado-0.0

STP (eff)—

Supercell—

K-Index30.3

Thermo & Levels

PWAT1.50 in

0–3 km LR2.7 °C/km

700–500 LR5.7 °C/km

Total Totals41.5

LCL928 hPa

LFC—

EL—

Freezing Lvl16,713 ft

San Francisco, California

Alerts