Hercules, CA Weather & Climate Normals
What a normal year in Hercules actually looks like
On the 30-year record NOAA keeps for Hercules, CA, the comfort score comes out to 78/100, mild with real seasons: A solid stretch of comfortable months alongside a noticeable but not extreme summer or winter. Only 9 months a year land in the 55–75°F range this site treats as mild.
How much Hercules's weather actually swings
Average temperatures in Hercules run from 50°F in Jan up to 71°F in Sep, a 21.6°F seasonal swing, a middling gap by national standards.
How wet Hercules actually gets
Hercules averages 21.49in of precipitation a year across roughly 0 days with measurable rain or snow; the nearest NOAA station does not record snowfall, so no snow figure is shown rather than guessed.
Hercules against the rest of the country
Out of 4876 cities scored here, Hercules comes in at 156; within CA alone it ranks 156 of 429. Population is about 26,499.
Checking the actual forecast
These figures come from VALLEJO, CA US, the NOAA station 7.8 miles from Hercules, averaged over 30 years, not tomorrow's forecast.
More on how this is worked out
Why some cities show no snow or rain figure · Why this uses the nearest NOAA station