Monrovia, CA Weather & Climate Normals
What a normal year in Monrovia actually looks like
On the 30-year record NOAA keeps for Monrovia, CA, the comfort score comes out to 77/100, 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 Monrovia's weather actually swings
Average temperatures in Monrovia run from 57°F in Dec up to 77°F in Aug, a 20°F seasonal swing, a middling gap by national standards.
Monrovia, month by month
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 69°F | 46°F | 3.56in | 0in |
| Feb | 68°F | 47°F | 4.22in | 0in |
| Mar | 71°F | 51°F | 2.53in | 0in |
| Apr | 74°F | 53°F | 0.61in | 0in |
| May | 76°F | 58°F | 0.48in | 0in |
| Jun | 81°F | 62°F | 0.13in | 0in |
| Jul | 86°F | 65°F | 0.04in | 0in |
| Aug | 88°F | 66°F | 0in | 0in |
| Sep | 87°F | 64°F | 0.13in | 0in |
| Oct | 81°F | 57°F | 0.61in | 0in |
| Nov | 74°F | 51°F | 0.92in | 0in |
| Dec | 68°F | 45°F | 2.44in | 0in |
If you're timing a visit, most of the year (9 of 12 months) are Monrovia's mildest stretch; if you're moving there, you should plan around Aug's heat instead.
How wet Monrovia actually gets
Over a typical year, Monrovia sees about 15.67in of precipitation a year across roughly 33 days with measurable rain or snow, with 0in of snow a year.
Monrovia against the rest of the country
Out of 4876 cities scored here, Monrovia comes in at 178; within CA alone it ranks 178 of 429. Population is about 37,787.
Checking the actual forecast
These figures come from San Gabriel Fire Dept, CA US, the NOAA station 8.6 miles from Monrovia, averaged over 30 years, not tomorrow's forecast.
More on how this is worked out
Why some cities show no snow or rain figure · What a 30-year climate normal actually is