Fountain Valley, CA Weather & Climate Normals
Fountain Valley's real weather, in one number
Fountain Valley, CA scores 93/100 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. 12 of the year's 12 months average between 55 and 75°F, the range this site counts as mild.
Fountain Valley's hottest and coldest months
Fountain Valley's hottest month is Aug, averaging 74°F; its coldest is Dec, averaging 57°F, a 16.4°F swing across the year, one of the smaller gaps in this dataset.
Fountain Valley's weather across the year
| Month | Avg high | Avg low | Precip |
|---|---|---|---|
| Jan | 67°F | 49°F | 2.59in |
| Feb | 67°F | 50°F | 2.64in |
| Mar | 68°F | 52°F | 1.62in |
| Apr | 70°F | 55°F | 0.52in |
| May | 71°F | 59°F | 0.27in |
| Jun | 74°F | 63°F | 0.01in |
| Jul | 79°F | 66°F | 0.04in |
| Aug | 80°F | 67°F | 0.01in |
| Sep | 80°F | 65°F | 0.1in |
| Oct | 77°F | 59°F | 0.54in |
| Nov | 72°F | 53°F | 0.8in |
| Dec | 67°F | 48°F | 2.04in |
Nothing in Fountain Valley's year falls outside this site's mild range - there's no heat or cold stretch to plan a visit around.
Rain and snow in Fountain Valley
Over a typical year, Fountain Valley sees about 11.18in of precipitation a year across roughly 41 days with measurable rain or snow. That station has no snowfall reading, so none is shown rather than assumed.
Where Fountain Valley ranks
Fountain Valley ranks 55 of 4876 US cities in this dataset for comfort score, and 55 of 429 within CA. About 56,036 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from Santa Ana John Wayne Ap, CA US, 5.3 miles from Fountain Valley, not a prediction for any specific day.
More on how this is worked out
Why some cities show no snow or rain figure · How the comfort score is calculated