Brentwood, CA Weather & Climate Normals
Brentwood's real weather, in one number
Brentwood, CA scores 64/100 on this site's reading of NOAA's own 30-year normals: mild with real seasons. A solid stretch of comfortable months alongside a noticeable but not extreme summer or winter. 7 of the year's 12 months average between 55 and 75°F, the range this site counts as mild.
Brentwood's hottest and coldest months
Brentwood's hottest month is Jul, averaging 76°F; its coldest is Jan, averaging 48°F, a 28°F swing across the year, a middling gap by national standards.
Rain and snow in Brentwood
Brentwood averages 12.6in of precipitation a year across roughly 50 days with measurable rain or snow, and 0in of snow a year.
Where Brentwood ranks
Brentwood ranks 336 of 4876 US cities in this dataset for comfort score, and 282 of 429 within CA. About 66,286 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from ANTIOCH PUMPING PLT #3, CA US, 3.8 miles from Brentwood, 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