Chehalis, Washington, United States Climate Change Severity

52
High
The current climate change severity in Chehalis is High, with a 28.000000000000004% 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 Aug. (Historical Vs 2026) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C

Chehalis 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), Chehalis temperature has changed by around +12.4%, and has experienced notable climate changes.

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

Comparison of Weather Condition (Historic Vs 2026)

HistoricDays

Year 2026Days

Change

sunnySunny
3698
172.2%
cloudyCloudy
5215
-71.1%
rainyRainy
11146
-58.5%
snowySnowy
21
-50%
mistyMisty
321
600%

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

Climate Change Indicators:

Over the past 16 years, Chehalis 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 2026, Chehalis experienced significant changes:

Temperature change of

+1.36 °C

Variation in annual rainfall

+10.78 %

Change in average humidity

-7.76 %

PM2.5 levels surged by

+26.54 %

Heatwave changed by

-3 Days

Coldwave changed by

-4 Days

Wind speeds changed by

+0.36 km/h

These indicators show that Chehalis 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 Aug.

Chehalis Weather Forecast 30 Days (September - October 2026)
Chehalis, Washington, United States

Condition
Temperature IconTemperature
Humidity IconHumi.
Wind IconWind Speed
Wed. 30, Sep.
overcastOvercast
Temperature Icon18°/9°
Humidity Icon79%
Wind Icon9km/h
Thu. 1, Oct.
overcastOvercast
Temperature Icon15°/10°
Humidity Icon70%
Wind Icon7.9km/h
Fri. 2, Oct.
sunnySunny
Temperature Icon22°/10°
Humidity Icon64%
Wind Icon8.6km/h
Sat. 3, Oct.
sunnySunny
Temperature Icon23°/8°
Humidity Icon61%
Wind Icon13.7km/h
Sun. 4, Oct.
sunnySunny
Temperature Icon24°/9°
Humidity Icon67%
Wind Icon9.7km/h
Mon. 5, Oct.
sunnySunny
Temperature Icon25°/10°
Humidity Icon71%
Wind Icon10.4km/h
Tue. 6, Oct.
sunnySunny
Temperature Icon22°/10°
Humidity Icon76%
Wind Icon12.6km/h
Wed. 7, Oct.
overcastOvercast
Temperature Icon23°/10°
Humidity Icon69%
Wind Icon7.6km/h
Thu. 8, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon18°/8°
Humidity Icon80%
Wind Icon9.1km/h
Fri. 9, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon16°/8°
Humidity Icon81%
Wind Icon10.3km/h
Sat. 10, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon16°/7°
Humidity Icon83%
Wind Icon11.7km/h
Sun. 11, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon16°/6°
Humidity Icon80%
Wind Icon9.3km/h
Mon. 12, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon16°/6°
Humidity Icon77%
Wind Icon9.7km/h
Tue. 13, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon17°/7°
Humidity Icon79%
Wind Icon12.5km/h
Wed. 14, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon16°/7°
Humidity Icon81%
Wind Icon12km/h
Thu. 15, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon16°/7°
Humidity Icon79%
Wind Icon10.5km/h
Fri. 16, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon17°/7°
Humidity Icon80%
Wind Icon11.3km/h
Sat. 17, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon15°/7°
Humidity Icon84%
Wind Icon10.1km/h
Sun. 18, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon16°/7°
Humidity Icon83%
Wind Icon10.7km/h
Mon. 19, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon16°/7°
Humidity Icon83%
Wind Icon11.7km/h
Tue. 20, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon15°/7°
Humidity Icon86%
Wind Icon10.7km/h
Wed. 21, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon14°/7°
Humidity Icon87%
Wind Icon11.9km/h
Thu. 22, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon14°/6°
Humidity Icon86%
Wind Icon10.7km/h
Fri. 23, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon14°/6°
Humidity Icon87%
Wind Icon12.4km/h
Sat. 24, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon13°/6°
Humidity Icon84%
Wind Icon11.9km/h
Sun. 25, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon12°/5°
Humidity Icon85%
Wind Icon15.4km/h
Mon. 26, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon12°/5°
Humidity Icon88%
Wind Icon13.5km/h
Tue. 27, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon13°/5°
Humidity Icon86%
Wind Icon11.3km/h
Wed. 28, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon13°/6°
Humidity Icon85%
Wind Icon11.5km/h
Thu. 29, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon13°/6°
Humidity Icon84%
Wind Icon8.9km/h
Fri. 30, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon13°/6°
Humidity Icon84%
Wind Icon12.3km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onMon. 5, Oct.

25°C

Low will be onSun. 25, Oct.

5°C

HumidityHumidity

High will be onMon. 26, Oct.

88%

Low will be onSat. 3, Oct.

61%

Wind SpeedWind Speed

High will be onSun. 25, Oct.

15.4km/h

Low will be onWed. 7, Oct.

7.6km/h

PrecipitationPrecipitation

High will be onMon. 26, Oct.

10.7mm

Low will be onThu. 8, Oct.

2.2mm

Ultraviolet IndexUV

High will be onSun. 4, Oct.

6

Low will be onThu. 22, Oct.

2

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