San Jose, California, United States Climate Change Severity

52
High
The current climate change severity in San Jose is High, with a 1.4% 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 Jul. (Historical Vs 2025) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C (c)

San Jose 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 Jose temperature has changed by around -4.2%, and has experienced notable climate changes.

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

Comparison of Weather Condition (Historic Vs 2025)

HistoricDays

Year 2025Days

Change

sunnySunny
10435
-66.3%
cloudyCloudy
5354
1.8%
rainyRainy
4231
-26.1%
snowySnowy
00
0%
mistyMisty
019
100%

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

Climate Change Indicators:

Over the past 15 years, San Jose has experienced measurable shifts in key climate parameters, contributing to the current severity score of 52 (within the High severity category). This suggests worsening climate conditions from the previous years. Here’s a breakdown of the specific changes observed:

Severity Score

52/100

High

Low
020
Moderate
40
High
60
Very High
80
Extreme
100

From 2010 to 2025, San Jose experienced significant changes:

Temperature change of

-0.6 °C

Variation in annual rainfall

-11.04 %

Change in average humidity

+13.4 %

PM2.5 levels surged by

-9.6 %

Heatwave changed by

-6.7 day(s)

Coldwave changed by

-1.4 day(s)

Wind speeds changed by

-3.7 km/h

These indicators show that San Jose is experiencing a more volatile and extreme climate, reinforcing the need for urgent intervention to mitigate risks. As the severity score rises, focus must shift to adaptation and emergency preparedness.

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

San Jose Weather Forecast 30 Days (August - September 2025)
San Jose, California, United States

Condition
Temperature IconTemperature
Humidity Iconhumi.
Wind IconWind Speed
Wed. 13, Aug.
partly cloudyPartly Cloudy
Temperature Icon31°/16°
Humidity Icon67%
Wind Icon12km/h
Thu. 14, Aug.
sunnySunny
Temperature Icon30°/15°
Humidity Icon67%
Wind Icon12km/h
Fri. 15, Aug.
sunnySunny
Temperature Icon33°/14°
Humidity Icon61%
Wind Icon16km/h
Sat. 16, Aug.
partly cloudyPartly Cloudy
Temperature Icon28°/16°
Humidity Icon77%
Wind Icon15km/h
Sun. 17, Aug.
sunnySunny
Temperature Icon29°/16°
Humidity Icon59%
Wind Icon16km/h
Mon. 18, Aug.
sunnySunny
Temperature Icon28°/14°
Humidity Icon55%
Wind Icon17km/h
Tue. 19, Aug.
sunnySunny
Temperature Icon30°/13°
Humidity Icon53%
Wind Icon15km/h
Wed. 20, Aug.
sunnySunny
Temperature Icon32°/14°
Humidity Icon47%
Wind Icon12km/h
Thu. 21, Aug.
sunnySunny
Temperature Icon35°/15°
Humidity Icon38%
Wind Icon11km/h
Fri. 22, Aug.
sunnySunny
Temperature Icon37°/18°
Humidity Icon40%
Wind Icon10km/h
Sat. 23, Aug.
sunnySunny
Temperature Icon36°/17°
Humidity Icon41%
Wind Icon12km/h
Sun. 24, Aug.
sunnySunny
Temperature Icon37°/16°
Humidity Icon31%
Wind Icon12km/h
Mon. 25, Aug.
sunnySunny
Temperature Icon37°/18°
Humidity Icon27%
Wind Icon11km/h
Tue. 26, Aug.
sunnySunny
Temperature Icon38°/19°
Humidity Icon25%
Wind Icon11km/h
Wed. 27, Aug.
sunnySunny
Temperature Icon30°/16°
Humidity Icon54%
Wind Icon15km/h
Thu. 28, Aug.
sunnySunny
Temperature Icon30°/16°
Humidity Icon56%
Wind Icon15km/h
Fri. 29, Aug.
sunnySunny
Temperature Icon29°/16°
Humidity Icon59%
Wind Icon16km/h
Sat. 30, Aug.
sunnySunny
Temperature Icon29°/15°
Humidity Icon59%
Wind Icon16km/h
Sun. 31, Aug.
sunnySunny
Temperature Icon29°/15°
Humidity Icon58%
Wind Icon14km/h
Mon. 1, Sep.
sunnySunny
Temperature Icon30°/16°
Humidity Icon53%
Wind Icon15km/h
Tue. 2, Sep.
sunnySunny
Temperature Icon30°/17°
Humidity Icon55%
Wind Icon14km/h
Wed. 3, Sep.
sunnySunny
Temperature Icon29°/16°
Humidity Icon56%
Wind Icon16km/h
Thu. 4, Sep.
sunnySunny
Temperature Icon29°/16°
Humidity Icon58%
Wind Icon15km/h
Fri. 5, Sep.
sunnySunny
Temperature Icon29°/16°
Humidity Icon57%
Wind Icon14km/h
Sat. 6, Sep.
sunnySunny
Temperature Icon31°/17°
Humidity Icon50%
Wind Icon14km/h
Sun. 7, Sep.
patchy rain possiblePatchy rain possible
Temperature Icon30°/17°
Humidity Icon50%
Wind Icon14km/h
Mon. 8, Sep.
patchy rain possiblePatchy rain possible
Temperature Icon29°/17°
Humidity Icon53%
Wind Icon15km/h
Tue. 9, Sep.
sunnySunny
Temperature Icon30°/16°
Humidity Icon52%
Wind Icon15km/h
Wed. 10, Sep.
sunnySunny
Temperature Icon30°/16°
Humidity Icon54%
Wind Icon13km/h
Thu. 11, Sep.
patchy rain possiblePatchy rain possible
Temperature Icon30°/17°
Humidity Icon57%
Wind Icon14km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onTue. 26, Aug.

38.1°C

Low will be onTue. 19, Aug.

12.9°C

HumidityHumidity

High will be onSat. 16, Aug.

77%

Low will be onTue. 26, Aug.

25%

Wind SpeedWind Speed

High will be onMon. 18, Aug.

16.6km/h

Low will be onFri. 22, Aug.

10.4km/h

PrecipitationPrecipitation

High will be onThu. 11, Sep.

0.2mm

Low will be onSat. 16, Aug.

0.02mm

Ultraviolet IndexUV

High will be onFri. 22, Aug.

7

Low will be onMon. 18, Aug.

5

Our Blogs

13 Aug 2025

Europe heatwave and wildfires 2025: What is happening across Spain, Portugal and neighbouring countries?

Europe heatwave and wildfires 2025: What is happening across Spain, Portugal and neighbouring countries?
12 Aug 2025

How Air Pollution Damages Your Long-Term Financial Health?

How Air Pollution Damages Your Long-Term Financial Health?
7 Aug 2025

Biggest Wildfire in France’s History?What It Means for Air Quality, Health, and Climate

Biggest Wildfire in France’s History?What It Means for Air Quality, Health, and Climate
6 Aug 2025

DU Cut-Off 2025: How’s the Air Near Your Dream College?

DU Cut-Off 2025: How’s the Air Near Your Dream College?
1 Aug 2025

Why You Should Add a Real-Time Weather and AQI Widget to Your Website?

Why You Should Add a Real-Time Weather and AQI Widget to Your Website?
31 Jul 2025

Minneapolis Air Quality Alert: Wildfire Smoke Pushes Pollution to Unhealthy Levels

Minneapolis Air Quality Alert: Wildfire Smoke Pushes Pollution to Unhealthy Levels
26 Jul 2025

New Delhi Annual Air Quality: Comparative Analysis of AQI (2020–2025)

New Delhi Annual Air Quality: Comparative Analysis of AQI (2020–2025)
26 Jul 2025

Free Air Quality Monitor from AQI.in: How Anyone Can Track Pollution?

Free Air Quality Monitor from AQI.in: How Anyone Can Track Pollution?
24 Jul 2025

Big Dreams, Toxic Air: Why a Father’s ‘No’ to Hansraj College Over Delhi Pollution is a Warning for India

Big Dreams, Toxic Air: Why a Father’s ‘No’ to Hansraj College Over Delhi Pollution is a Warning for India
19 Jul 2025

What Is the Real Impact of Air Pollution on Property Rates in India?

What Is the Real Impact of Air Pollution on Property Rates in India?