Chehalis, Washington, United States Climate Change Severity

48
High
The current climate change severity in Chehalis is High, with a 18.1% 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 May (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 +19.3%, and has experienced notable climate changes.

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

Comparison of Weather Condition (Historic Vs 2026)

HistoricDays

Year 2026Days

Change

sunnySunny
1438
171.4%
cloudyCloudy
259
-64%
rainyRainy
8837
-57.9%
snowySnowy
21
-50%
mistyMisty
021
100%

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 48 (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

48/100

High

Low
020
Moderate
40
High
60
Very High
80
Extreme
100

From 2010 to 2026, Chehalis experienced significant changes:

Temperature change of

+1.39 °C

Variation in annual rainfall

+18.7 %

Change in average humidity

-6.78 %

PM2.5 levels surged by

+4.61 %

Heatwave changed by

-2 Days

Coldwave changed by

-4 Days

Wind speeds changed by

-0.75 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 May

Chehalis Weather Forecast 30 Days (June - July 2026)
Chehalis, Washington, United States

Condition
Temperature IconTemperature
Humidity IconHumi.
Wind IconWind Speed
Thu. 4, Jun.
partly cloudyPartly Cloudy
Temperature Icon20°/7°
Humidity Icon66%
Wind Icon16.6km/h
Fri. 5, Jun.
patchy rain possiblePatchy rain nearby
Temperature Icon14°/5°
Humidity Icon83%
Wind Icon13.3km/h
Sat. 6, Jun.
moderate rainRain
Temperature Icon13°/5°
Humidity Icon92%
Wind Icon11.2km/h
Sun. 7, Jun.
patchy rain possiblePatchy rain nearby
Temperature Icon19°/4°
Humidity Icon69%
Wind Icon7.6km/h
Mon. 8, Jun.
moderate rainRain
Temperature Icon13°/8°
Humidity Icon94%
Wind Icon12.2km/h
Tue. 9, Jun.
patchy rain possiblePatchy rain nearby
Temperature Icon16°/6°
Humidity Icon88%
Wind Icon7.2km/h
Wed. 10, Jun.
patchy rain possiblePatchy rain nearby
Temperature Icon18°/4°
Humidity Icon80%
Wind Icon10.4km/h
Thu. 11, Jun.
partly cloudyPartly Cloudy
Temperature Icon23°/8°
Humidity Icon74%
Wind Icon9.4km/h
Fri. 12, Jun.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon21°/9°
Humidity Icon76%
Wind Icon11.5km/h
Sat. 13, Jun.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon18°/9°
Humidity Icon80%
Wind Icon13.3km/h
Sun. 14, Jun.
heavy rain at timesHeavy rain at times
Temperature Icon19°/8°
Humidity Icon75%
Wind Icon11.9km/h
Mon. 15, Jun.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon20°/8°
Humidity Icon75%
Wind Icon13km/h
Tue. 16, Jun.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon19°/8°
Humidity Icon78%
Wind Icon10.8km/h
Wed. 17, Jun.
moderate rain at timesModerate rain at times
Temperature Icon20°/8°
Humidity Icon75%
Wind Icon11.5km/h
Thu. 18, Jun.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon20°/9°
Humidity Icon76%
Wind Icon11.9km/h
Fri. 19, Jun.
heavy rain at timesHeavy rain at times
Temperature Icon21°/9°
Humidity Icon77%
Wind Icon11.2km/h
Sat. 20, Jun.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon21°/9°
Humidity Icon75%
Wind Icon11.9km/h
Sun. 21, Jun.
patchy rain possiblePatchy rain possible
Temperature Icon22°/10°
Humidity Icon72%
Wind Icon11.9km/h
Mon. 22, Jun.
moderate rain at timesModerate rain at times
Temperature Icon23°/9°
Humidity Icon71%
Wind Icon11.5km/h
Tue. 23, Jun.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon22°/10°
Humidity Icon74%
Wind Icon11.5km/h
Wed. 24, Jun.
heavy rain at timesHeavy rain at times
Temperature Icon23°/10°
Humidity Icon74%
Wind Icon12.2km/h
Thu. 25, Jun.
heavy rain at timesHeavy rain at times
Temperature Icon24°/10°
Humidity Icon74%
Wind Icon11.5km/h
Fri. 26, Jun.
heavy rain at timesHeavy rain at times
Temperature Icon24°/11°
Humidity Icon73%
Wind Icon10.8km/h
Sat. 27, Jun.
moderate rain at timesModerate rain at times
Temperature Icon24°/11°
Humidity Icon75%
Wind Icon11.2km/h
Sun. 28, Jun.
patchy rain possiblePatchy rain possible
Temperature Icon24°/12°
Humidity Icon76%
Wind Icon11.9km/h
Mon. 29, Jun.
patchy rain possiblePatchy rain possible
Temperature Icon23°/11°
Humidity Icon74%
Wind Icon11.5km/h
Tue. 30, Jun.
patchy rain possiblePatchy rain possible
Temperature Icon24°/11°
Humidity Icon73%
Wind Icon12.2km/h
Wed. 1, Jul.
moderate rain at timesModerate rain at times
Temperature Icon24°/11°
Humidity Icon72%
Wind Icon13.3km/h
Thu. 2, Jul.
moderate rain at timesModerate rain at times
Temperature Icon24°/11°
Humidity Icon73%
Wind Icon12.2km/h
Fri. 3, Jul.
moderate rain at timesModerate rain at times
Temperature Icon24°/11°
Humidity Icon70%
Wind Icon11.2km/h
Sat. 4, Jul.
patchy rain possiblePatchy rain possible
Temperature Icon25°/10°
Humidity Icon69%
Wind Icon11.2km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onSat. 4, Jul.

25°C

Low will be onSun. 7, Jun.

4°C

HumidityHumidity

High will be onMon. 8, Jun.

94%

Low will be onThu. 4, Jun.

66%

Wind SpeedWind Speed

High will be onThu. 4, Jun.

16.6km/h

Low will be onTue. 9, Jun.

7.2km/h

PrecipitationPrecipitation

High will be onMon. 8, Jun.

15.8mm

Low will be onThu. 4, Jun.

0.01mm

Ultraviolet IndexUV

High will be onThu. 4, Jun.

8

Low will be onMon. 8, Jun.

2

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