San Francisco, California, United States Climate Change Severity

62
Very High
The current climate change severity in San Francisco is Very High, with a 24.3% worsening in the climate score compared to last 15 years. This suggests deteriorating conditions, with increasing negative impacts on weather patterns and environmental conditions.
Data: Jan. to Jun. (Historical Vs 2025) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C

San Francisco Weather Condition Changes (Historic Vs 2025)

2025
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Historic
2025

Over the past 15 year(s), San Francisco temperature has changed by around -12.3%, and has experienced notable climate changes.

Sunny
Cloudy
Rainy
Snowy
Misty
Data: Jan. to Jun. (Historical Vs 2025)

Comparison of Weather Condition (Historic Vs 2025)

HistoricDays

Year 2025Days

Change

sunnySunny
7011
-84.2%
cloudyCloudy
5521
-61.8%
rainyRainy
4237
-11.9%
snowySnowy
00
0%
mistyMisty
020
100%

Disclaimer: Other weather conditions not shown may affect the total day count.

Climate Change Indicators:

Over the past 15 years, San Francisco has experienced measurable shifts in key climate parameters, contributing to the current severity score of 62 (within the Very High severity category). This suggests worsening climate conditions from the previous years. Here’s a breakdown of the specific changes observed:

Severity Score

62/100

Very High

Low
020
Moderate
40
High
60
Very High
80
Extreme
100

From 2010 to 2025, San Francisco experienced significant changes:

Temperature change of

-1.5 °C

Variation in annual rainfall

-10.8 %

Change in average humidity

+21.5 %

PM2.5 levels surged by

-9.09 %

Heatwave changed by

-2.6 day(s)

Coldwave changed by

+21.3 day(s)

Wind speeds changed by

-1.3 km/h

These indicators show a dramatic increase in volatility and worsening conditions. San Francisco's Very High severity status requires urgent and immediate adaptation and mitigation strategies, particularly focused on managing extreme weather events, improving air quality, and ensuring water resources are adequate for the population.

Check how we calculate Climate Change Severity
Based on data from Jan. to Jun.

San Francisco Weather Forecast 30 Days (July - August 2025)
San Francisco, California, United States

Condition
Temperature IconTemperature
Humidity Iconhumi.
Wind IconWind Speed
Thu. 31, Jul.
mistMist
Temperature Icon17°/14°
Humidity Icon94%
Wind Icon23km/h
Fri. 1, Aug.
fogFog
Temperature Icon16°/14°
Humidity Icon95%
Wind Icon23km/h
Sat. 2, Aug.
fogFog
Temperature Icon19°/13°
Humidity Icon86%
Wind Icon22km/h
Sun. 3, Aug.
sunnySunny
Temperature Icon20°/14°
Humidity Icon75%
Wind Icon29km/h
Mon. 4, Aug.
sunnySunny
Temperature Icon19°/15°
Humidity Icon80%
Wind Icon22km/h
Tue. 5, Aug.
sunnySunny
Temperature Icon23°/14°
Humidity Icon71%
Wind Icon16km/h
Wed. 6, Aug.
sunnySunny
Temperature Icon24°/16°
Humidity Icon65%
Wind Icon17km/h
Thu. 7, Aug.
partly cloudyPartly Cloudy
Temperature Icon23°/17°
Humidity Icon66%
Wind Icon18km/h
Fri. 8, Aug.
sunnySunny
Temperature Icon21°/14°
Humidity Icon77%
Wind Icon17km/h
Sat. 9, Aug.
sunnySunny
Temperature Icon20°/15°
Humidity Icon79%
Wind Icon23km/h
Sun. 10, Aug.
sunnySunny
Temperature Icon21°/15°
Humidity Icon79%
Wind Icon16km/h
Mon. 11, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon21°/15°
Humidity Icon81%
Wind Icon21km/h
Tue. 12, Aug.
partly cloudyPartly Cloudy
Temperature Icon20°/15°
Humidity Icon81%
Wind Icon21km/h
Wed. 13, Aug.
sunnySunny
Temperature Icon19°/15°
Humidity Icon83%
Wind Icon22km/h
Thu. 14, Aug.
sunnySunny
Temperature Icon24°/15°
Humidity Icon72%
Wind Icon16km/h
Fri. 15, Aug.
sunnySunny
Temperature Icon24°/15°
Humidity Icon72%
Wind Icon17km/h
Sat. 16, Aug.
sunnySunny
Temperature Icon25°/15°
Humidity Icon71%
Wind Icon15km/h
Sun. 17, Aug.
sunnySunny
Temperature Icon24°/15°
Humidity Icon73%
Wind Icon17km/h
Mon. 18, Aug.
sunnySunny
Temperature Icon23°/14°
Humidity Icon73%
Wind Icon17km/h
Tue. 19, Aug.
sunnySunny
Temperature Icon23°/14°
Humidity Icon75%
Wind Icon16km/h
Wed. 20, Aug.
sunnySunny
Temperature Icon22°/14°
Humidity Icon77%
Wind Icon16km/h
Thu. 21, Aug.
patchy rain possiblePatchy rain possible
Temperature Icon22°/14°
Humidity Icon77%
Wind Icon18km/h
Fri. 22, Aug.
sunnySunny
Temperature Icon23°/14°
Humidity Icon76%
Wind Icon16km/h
Sat. 23, Aug.
sunnySunny
Temperature Icon23°/14°
Humidity Icon75%
Wind Icon16km/h
Sun. 24, Aug.
sunnySunny
Temperature Icon23°/14°
Humidity Icon75%
Wind Icon17km/h
Mon. 25, Aug.
sunnySunny
Temperature Icon23°/14°
Humidity Icon74%
Wind Icon15km/h
Tue. 26, Aug.
sunnySunny
Temperature Icon23°/14°
Humidity Icon72%
Wind Icon17km/h
Wed. 27, Aug.
sunnySunny
Temperature Icon24°/15°
Humidity Icon70%
Wind Icon18km/h
Thu. 28, Aug.
patchy rain possiblePatchy rain possible
Temperature Icon24°/15°
Humidity Icon70%
Wind Icon17km/h
Fri. 29, Aug.
sunnySunny
Temperature Icon24°/15°
Humidity Icon72%
Wind Icon17km/h
Sat. 30, Aug.
sunnySunny
Temperature Icon23°/14°
Humidity Icon74%
Wind Icon17km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onSat. 16, Aug.

24.5°C

Low will be onSat. 2, Aug.

12.7°C

HumidityHumidity

High will be onFri. 1, Aug.

95%

Low will be onWed. 6, Aug.

65%

Wind SpeedWind Speed

High will be onSun. 3, Aug.

29.2km/h

Low will be onSat. 16, Aug.

15.1km/h

PrecipitationPrecipitation

High will be onThu. 21, Aug.

0.1mm

Low will be onSat. 2, Aug.

0.01mm

Ultraviolet IndexUV

High will be onMon. 4, Aug.

5

Low will be onMon. 11, Aug.

4

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