Fountain Valley Climate by Month
Fountain Valley, California, United States
Warm summers and mild winters, with little rain, mostly from December to March.
Warm summers and mild winters, with little rain, mostly from December to March: that's Fountain Valley's climate in short. Expect highs of 83°F (28°C) in August and 69°F (20°C) in December, with the coldest nights (December) near 46°F (8°C). It gets only 12 in (295 mm) of rain a year. May to September are almost completely dry.
- Warmest month
- 83°F(28°C)
- Average high, August
- Coldest nights
- 46°F(8°C)
- Average low, December
- Rain per year
- 12 in(295 mm)
- Wettest: February
- Humidity
- 57%
- Sunniest: July
Best and worst months in Fountain Valley
Best for weatherMay, June and November are the best time for weather in Fountain Valley: highs near 75°F (24°C) and almost no rain.
Least pleasantJanuary and February are the least pleasant; February is the coldest, with highs of only 69°F (21°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in May.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Fountain Valley weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 69°F(21°C) | 47°F(8°C) | 2.4 in(61 mm) | 55% | 2.8 |
| FebFebruary | 69°F(21°C) | 48°F(9°C) | 2.8 in(71 mm) | 54% | 3.3 |
| MarMarch | 71°F(21°C) | 50°F(10°C) | 1.9 in(47 mm) | 62% | 4.7 |
| AprApril | 73°F(23°C) | 52°F(11°C) | 0.8 in(20 mm) | 56% | 5.9 |
| MayMayBest | 74°F(24°C) | 57°F(14°C) | 0.2 in(5 mm) | 60% | 6.2 |
| JunJuneBest | 77°F(25°C) | 60°F(16°C) | 0.1 in(2 mm) | 63% | 6.6 |
| JulJuly | 81°F(27°C) | 64°F(18°C) | 0.0 in(1 mm) | 63% | 6.6 |
| AugAugust | 83°F(28°C) | 65°F(18°C) | 0.0 in(1 mm) | 60% | 6.5 |
| SepSeptember | 83°F(28°C) | 63°F(17°C) | 0.2 in(4 mm) | 58% | 5.4 |
| OctOctober | 79°F(26°C) | 58°F(14°C) | 0.5 in(12 mm) | 55% | 4.0 |
| NovNovemberBest | 74°F(24°C) | 51°F(10°C) | 0.8 in(21 mm) | 52% | 3.2 |
| DecDecember | 69°F(20°C) | 46°F(8°C) | 2.0 in(50 mm) | 50% | 2.6 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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