Fullerton, CA Weather & Climate Normals
What a normal year in Fullerton actually looks like
On the 30-year record NOAA keeps for Fullerton, CA, the comfort score comes out to 82/100, very mild year-round: Many months fall in a comfortable temperature range with limited snow or seasonal extremes. Only 10 months a year land in the 55–75°F range this site treats as mild.
How much Fullerton's weather actually swings
Average temperatures in Fullerton run from 57°F in Dec up to 77°F in Aug, a 19.7°F seasonal swing, one of the smaller gaps in this dataset.
How wet Fullerton actually gets
Fullerton averages 11.86in of precipitation a year across roughly 38 days with measurable rain or snow; the nearest NOAA station does not record snowfall, so no snow figure is shown rather than guessed.
Fullerton against the rest of the country
Out of 4876 cities scored here, Fullerton comes in at 90; within CA alone it ranks 90 of 429. Population is about 140,054.
Checking the actual forecast
These figures come from FULLERTON MUNI AP, CA US, the NOAA station 3.1 miles from Fullerton, 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