Montclair, CA Weather & Climate Normals
What a normal year in Montclair actually looks like
On the 30-year record NOAA keeps for Montclair, CA, the comfort score comes out to 76/100, 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 Montclair's weather actually swings
Average temperatures in Montclair run from 54°F in Dec up to 78°F in Aug, a 23.4°F seasonal swing, a middling gap by national standards.
Montclair, month by month
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 68°F | 43°F | 2.91in | 0in |
| Feb | 67°F | 45°F | 4.15in | 0in |
| Mar | 72°F | 47°F | 2.12in | 0in |
| Apr | 76°F | 50°F | 0.97in | 0in |
| May | 78°F | 54°F | 0.22in | 0in |
| Jun | 84°F | 57°F | 0.06in | 0in |
| Jul | 90°F | 62°F | 0in | 0in |
| Aug | 92°F | 63°F | 0.03in | 0in |
| Sep | 89°F | 60°F | 0.01in | 0in |
| Oct | 81°F | 54°F | 0.97in | 0in |
| Nov | 74°F | 47°F | 0.74in | 0in |
| Dec | 67°F | 42°F | 2.29in | 0in |
If you're timing a visit, most of the year (9 of 12 months) are Montclair's mildest stretch; if you're moving there, you should plan around Aug's heat and Dec's cold instead.
How wet Montclair actually gets
Over a typical year, Montclair sees about 14.47in of precipitation a year across roughly 31 days with measurable rain or snow, with 0in of snow a year.
Montclair against the rest of the country
Out of 4876 cities scored here, Montclair comes in at 199; within CA alone it ranks 199 of 429. Population is about 37,650.
Checking the actual forecast
These figures come from Pomona/Fairplex, CA US, the NOAA station 3.9 miles from Montclair, 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