Chehalis, WA Weather & Climate Normals
What a normal year in Chehalis actually looks like
On the 30-year record NOAA keeps for Chehalis, WA, the comfort score comes out to 56/100, strongly seasonal: Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. Only 5 months a year land in the 55–75°F range this site treats as mild.
How much Chehalis's weather actually swings
Average temperatures in Chehalis run from 40°F in Dec up to 66°F in Aug, a 26°F seasonal swing, a middling gap by national standards.
How wet Chehalis actually gets
Chehalis averages 41.59in of precipitation a year across roughly 172 days with measurable rain or snow; the nearest NOAA station does not record snowfall, so no snow figure is shown rather than guessed.
Chehalis against the rest of the country
Out of 4876 cities scored here, Chehalis comes in at 795; within WA alone it ranks 58 of 125. Population is about 7,717.
Checking the actual forecast
These figures come from CENTRALIA, WA US, the NOAA station 3.9 miles from Chehalis, averaged over 30 years, not tomorrow's forecast.
More on how this is worked out
Why some cities show no snow or rain figure · What a 30-year climate normal actually is