Rialto, CA Weather & Climate Normals
What a normal year in Rialto actually looks like
On the 30-year record NOAA keeps for Rialto, CA, the comfort score comes out to 75/100, 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 Rialto's weather actually swings
Average temperatures in Rialto run from 56°F in Dec up to 80°F in Aug, a 24°F seasonal swing, a middling gap by national standards.
How wet Rialto actually gets
Over a typical year, Rialto sees about 9.92in of precipitation a year across roughly 38 days with measurable rain or snow, with 0in of snow a year.
Rialto against the rest of the country
Out of 4876 cities scored here, Rialto comes in at 215; within CA alone it ranks 215 of 429. Population is about 104,918.
Checking the actual forecast
These figures come from RIVERSIDE CITRUS EXP, CA US, the NOAA station 10.5 miles from Rialto, averaged over 30 years, not tomorrow's forecast.
More on how this is worked out
Why this uses the nearest NOAA station · How the comfort score is calculated