La Mesa, CA Weather & Climate Normals
La Mesa's real weather, in one number
La Mesa, CA scores 86/100 on this site's reading of NOAA's own 30-year normals: very mild year-round. Many months fall in a comfortable temperature range with limited snow or seasonal extremes. 11 of the year's 12 months average between 55 and 75°F, the range this site counts as mild.
La Mesa's hottest and coldest months
La Mesa's hottest month is Aug, averaging 77°F; its coldest is Dec, averaging 55°F, a 21.6°F swing across the year, a middling gap by national standards.
Rain and snow in La Mesa
La Mesa averages 11.63in of precipitation a year across roughly 36 days with measurable rain or snow, and 0in of snow a year.
Where La Mesa ranks
La Mesa ranks 86 of 4876 US cities in this dataset for comfort score, and 86 of 429 within CA. About 60,767 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from EL CAJON, CA US, 5.9 miles from La Mesa, not a prediction for any specific day.
More on how this is worked out
How the comfort score is calculated · Why some cities show no snow or rain figure