Issaquah, WA Weather & Climate Normals
What a normal year in Issaquah actually looks like
On the 30-year record NOAA keeps for Issaquah, 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 Issaquah's weather actually swings
Average temperatures in Issaquah run from 42°F in Dec up to 68°F in Aug, a 25.7°F seasonal swing, a middling gap by national standards.
How wet Issaquah actually gets
Issaquah averages 34.69in of precipitation a year across roughly 153 days with measurable rain or snow; the nearest NOAA station does not record snowfall, so no snow figure is shown rather than guessed.
Issaquah against the rest of the country
Out of 4876 cities scored here, Issaquah comes in at 747; within WA alone it ranks 41 of 125. Population is about 39,664.
Checking the actual forecast
These figures come from RENTON MUNI AP, WA US, the NOAA station 8.5 miles from Issaquah, 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