Napa, California, United States Climate Change Severity

57
High
The current climate change severity in Napa is High, with a 14.000000000000002% 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
°C

Napa Weather Condition Changes (Historic Vs 2026)

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

Over the past 16 year(s), Napa temperature has changed by around +4.6%, 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
9292
0%
cloudyCloudy
5538
-30.9%
rainyRainy
4019
-52.5%
snowySnowy
00
0%
mistyMisty
319
533.3%

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

Climate Change Indicators:

Over the past 16 years, Napa has experienced measurable shifts in key climate parameters, contributing to the current severity score of 57 (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

57/100

High

Low
020
Moderate
40
High
60
Very High
80
Extreme
100

From 2010 to 2026, Napa experienced significant changes:

Temperature change of

+0.68 °C

Variation in annual rainfall

+31.42 %

Change in average humidity

+8.1 %

PM2.5 levels surged by

-26.08 %

Heatwave changed by

+2 Days

Coldwave changed by

-3 Days

Wind speeds changed by

-2.08 km/h

These indicators show that Napa 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.

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

Condition
Temperature IconTemperature
Humidity IconHumi.
Wind IconWind Speed
Sun. 16, Aug.
sunnySunny
Temperature Icon27°/12°
Humidity Icon65%
Wind Icon11.5km/h
Mon. 17, Aug.
sunnySunny
Temperature Icon25°/11°
Humidity Icon68%
Wind Icon11.5km/h
Tue. 18, Aug.
sunnySunny
Temperature Icon31°/12°
Humidity Icon61%
Wind Icon12.6km/h
Wed. 19, Aug.
sunnySunny
Temperature Icon28°/12°
Humidity Icon64%
Wind Icon12.6km/h
Thu. 20, Aug.
sunnySunny
Temperature Icon27°/12°
Humidity Icon68%
Wind Icon13.7km/h
Fri. 21, Aug.
sunnySunny
Temperature Icon27°/13°
Humidity Icon67%
Wind Icon15.5km/h
Sat. 22, Aug.
sunnySunny
Temperature Icon30°/12°
Humidity Icon61%
Wind Icon11.2km/h
Sun. 23, Aug.
sunnySunny
Temperature Icon29°/12°
Humidity Icon60%
Wind Icon11.2km/h
Mon. 24, Aug.
patchy rain possibleRain Possible
Temperature Icon28°/14°
Humidity Icon64%
Wind Icon14.6km/h
Tue. 25, Aug.
sunnySunny
Temperature Icon28°/14°
Humidity Icon62%
Wind Icon13.6km/h
Wed. 26, Aug.
sunnySunny
Temperature Icon28°/14°
Humidity Icon59%
Wind Icon14.2km/h
Thu. 27, Aug.
sunnySunny
Temperature Icon30°/14°
Humidity Icon58%
Wind Icon13.9km/h
Fri. 28, Aug.
patchy rain possibleRain Possible
Temperature Icon29°/15°
Humidity Icon59%
Wind Icon15km/h
Sat. 29, Aug.
patchy rain possibleRain Possible
Temperature Icon28°/15°
Humidity Icon62%
Wind Icon14.8km/h
Sun. 30, Aug.
sunnySunny
Temperature Icon29°/14°
Humidity Icon61%
Wind Icon14.9km/h
Mon. 31, Aug.
sunnySunny
Temperature Icon29°/14°
Humidity Icon61%
Wind Icon14.1km/h
Tue. 1, Sep.
patchy rain possibleRain Possible
Temperature Icon30°/15°
Humidity Icon57%
Wind Icon13.5km/h
Wed. 2, Sep.
patchy rain possibleRain Possible
Temperature Icon29°/15°
Humidity Icon59%
Wind Icon13.7km/h
Thu. 3, Sep.
patchy rain possibleRain Possible
Temperature Icon30°/15°
Humidity Icon57%
Wind Icon13.9km/h
Fri. 4, Sep.
sunnySunny
Temperature Icon29°/14°
Humidity Icon57%
Wind Icon13.8km/h
Sat. 5, Sep.
sunnySunny
Temperature Icon30°/14°
Humidity Icon58%
Wind Icon13.9km/h
Sun. 6, Sep.
sunnySunny
Temperature Icon31°/15°
Humidity Icon51%
Wind Icon13.5km/h
Mon. 7, Sep.
patchy rain possibleRain Possible
Temperature Icon30°/15°
Humidity Icon53%
Wind Icon14.8km/h
Tue. 8, Sep.
sunnySunny
Temperature Icon30°/15°
Humidity Icon56%
Wind Icon14.3km/h
Wed. 9, Sep.
patchy rain possibleRain Possible
Temperature Icon29°/15°
Humidity Icon56%
Wind Icon14km/h
Thu. 10, Sep.
patchy rain possibleRain Possible
Temperature Icon29°/15°
Humidity Icon58%
Wind Icon13.9km/h
Fri. 11, Sep.
sunnySunny
Temperature Icon29°/15°
Humidity Icon59%
Wind Icon14km/h
Sat. 12, Sep.
patchy rain possibleRain Possible
Temperature Icon28°/14°
Humidity Icon62%
Wind Icon14.4km/h
Sun. 13, Sep.
patchy rain possibleRain Possible
Temperature Icon27°/14°
Humidity Icon65%
Wind Icon13.5km/h
Mon. 14, Sep.
sunnySunny
Temperature Icon26°/14°
Humidity Icon65%
Wind Icon14.2km/h
Tue. 15, Sep.
patchy rain possibleRain Possible
Temperature Icon26°/13°
Humidity Icon66%
Wind Icon16.1km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onTue. 18, Aug.

31°C

Low will be onMon. 17, Aug.

11°C

HumidityHumidity

High will be onMon. 17, Aug.

68%

Low will be onSun. 6, Sep.

51%

Wind SpeedWind Speed

High will be onTue. 15, Sep.

16.1km/h

Low will be onSat. 22, Aug.

11.2km/h

PrecipitationPrecipitation

High will be onSun. 13, Sep.

0.2mm

Low will be onSat. 29, Aug.

0.01mm

Ultraviolet IndexUV

High will be onTue. 18, Aug.

9.3

Low will be onMon. 24, Aug.

4

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