San Jose, California, United States Climate Change Severity

67
Very High
The current climate change severity in San Jose is Very High, with a 30.5% worsening in the climate score compared to last 16 years. This suggests deteriorating conditions, with increasing negative impacts on weather patterns and environmental conditions.
Data: Jan. to Jul. (Historical Vs 2026) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100


San Jose Weather Condition Changes (Historic Vs 2026)

0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Historic
2026

Over the past 16 year(s), San Jose temperature has changed by around +6.6%, and has experienced notable climate changes.

Sunny
Cloudy
Rainy
Snowy
Misty
Data: Jan. to Jul. (Historical Vs 2026)

Comparison of Weather Condition (Historic Vs 2026)

HistoricDays

Year 2026Days

Change

sunnySunny
10099
-1%

cloudyCloudy
5334
-35.8%

rainyRainy
4220
-52.3%

snowySnowy
00
0%

mistyMisty
115
1400%

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

Climate Change Indicators:

Over the past 16 years, San Jose has experienced measurable shifts in key climate parameters, contributing to the current severity score of 67 (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

67/100


Very High

Low
020
Moderate
40
High
60
Very High
80
Extreme
100

From 2010 to 2026, San Jose experienced significant changes:

Temperature change of

+0.98 °C


Variation in annual rainfall

+47.35 %


Change in average humidity

+8.51 %


PM2.5 levels surged by

-35.55 %


Heatwave changed by

+5 Days


Coldwave changed by

-1 Days


Wind speeds changed by

-4.1 km/h


These indicators show a dramatic increase in volatility and worsening conditions. San Jose'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 Jul.

San Jose Weather Forecast 30 Days (August - September 2026)
San Jose, California, United States


Condition
Temperature IconTemperature
Humidity IconHumi.
Wind IconWind Speed
Mon. 17, Aug.
patchy rain possiblePatchy rain nearby

Temperature Icon22°/11°

Humidity Icon77%

Wind Icon24.8km/h
Tue. 18, Aug.
patchy rain possiblePatchy rain nearby

Temperature Icon11°/11°

Humidity Icon64%

Wind Icon24.5km/h
Wed. 19, Aug.
patchy rain possiblePatchy rain nearby

Temperature Icon12°/11°

Humidity Icon62%

Wind Icon32km/h
Thu. 20, Aug.
patchy rain possiblePatchy rain nearby

Temperature Icon13°/12°

Humidity Icon80%

Wind Icon66.6km/h
Fri. 21, Aug.
moderate or heavy rain showerRain Showers

Temperature Icon14°/12°

Humidity Icon88%

Wind Icon74.2km/h
Sat. 22, Aug.
patchy rain possiblePatchy rain nearby

Temperature Icon12°/11°

Humidity Icon69%

Wind Icon35.3km/h
Sun. 23, Aug.
patchy rain possiblePatchy rain nearby

Temperature Icon11°/11°

Humidity Icon60%

Wind Icon37.4km/h
Mon. 24, Aug.
patchy rain possiblePatchy rain nearby

Temperature Icon12°/11°

Humidity Icon70%

Wind Icon37.8km/h
Tue. 25, Aug.
patchy rain possibleRain Possible

Temperature Icon29°/14°

Humidity Icon58%

Wind Icon15km/h
Wed. 26, Aug.
patchy rain possibleRain Possible

Temperature Icon29°/14°

Humidity Icon54%

Wind Icon15.4km/h
Thu. 27, Aug.
sunnySunny

Temperature Icon31°/14°

Humidity Icon52%

Wind Icon15.7km/h
Fri. 28, Aug.
patchy rain possibleRain Possible

Temperature Icon30°/15°

Humidity Icon54%

Wind Icon16.6km/h
Sat. 29, Aug.
sunnySunny

Temperature Icon29°/14°

Humidity Icon56%

Wind Icon16.1km/h
Sun. 30, Aug.
patchy rain possibleRain Possible

Temperature Icon29°/15°

Humidity Icon58%

Wind Icon17.1km/h
Mon. 31, Aug.
patchy rain possibleRain Possible

Temperature Icon29°/14°

Humidity Icon55%

Wind Icon14.7km/h
Tue. 1, Sep.
sunnySunny

Temperature Icon30°/15°

Humidity Icon52%

Wind Icon15.2km/h
Wed. 2, Sep.
patchy rain possibleRain Possible

Temperature Icon30°/16°

Humidity Icon54%

Wind Icon14.5km/h
Thu. 3, Sep.
patchy rain possibleRain Possible

Temperature Icon30°/15°

Humidity Icon53%

Wind Icon15.7km/h
Fri. 4, Sep.
sunnySunny

Temperature Icon29°/14°

Humidity Icon54%

Wind Icon15.1km/h
Sat. 5, Sep.
sunnySunny

Temperature Icon30°/14°

Humidity Icon55%

Wind Icon14.9km/h
Sun. 6, Sep.
sunnySunny

Temperature Icon31°/16°

Humidity Icon48%

Wind Icon14.1km/h
Mon. 7, Sep.
sunnySunny

Temperature Icon30°/16°

Humidity Icon50%

Wind Icon15.4km/h
Tue. 8, Sep.
patchy rain possibleRain Possible

Temperature Icon30°/15°

Humidity Icon53%

Wind Icon15.7km/h
Wed. 9, Sep.
sunnySunny

Temperature Icon29°/15°

Humidity Icon51%

Wind Icon15.9km/h
Thu. 10, Sep.
patchy rain possibleRain Possible

Temperature Icon29°/15°

Humidity Icon54%

Wind Icon14.3km/h
Fri. 11, Sep.
moderate rain at timesRain

Temperature Icon29°/15°

Humidity Icon58%

Wind Icon15km/h
Sat. 12, Sep.
patchy rain possibleRain Possible

Temperature Icon28°/14°

Humidity Icon58%

Wind Icon15.8km/h
Sun. 13, Sep.
patchy rain possibleRain Possible

Temperature Icon28°/14°

Humidity Icon61%

Wind Icon15km/h
Mon. 14, Sep.
patchy rain possibleRain Possible

Temperature Icon27°/13°

Humidity Icon61%

Wind Icon16km/h
Tue. 15, Sep.
patchy rain possibleRain Possible

Temperature Icon26°/14°

Humidity Icon63%

Wind Icon16.7km/h
Wed. 16, Sep.
patchy rain possibleRain Possible

Temperature Icon27°/13°

Humidity Icon64%

Wind Icon15.2km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onThu. 27, Aug.

31°C


Low will be onMon. 17, Aug.

11°C

HumidityHumidity

High will be onFri. 21, Aug.

88%


Low will be onSun. 6, Sep.

48%

Wind SpeedWind Speed

High will be onFri. 21, Aug.

74.2km/h


Low will be onSun. 6, Sep.

14.1km/h

PrecipitationPrecipitation

High will be onFri. 21, Aug.

28.6mm


Low will be onTue. 25, Aug.

0.01mm

Ultraviolet IndexUV

High will be onWed. 19, Aug.

9.7


Low will be onMon. 24, Aug.

3