Simi Valley vs Fountain Valley Climate
84%matchOn climate, Fountain Valley is a 84% match for Simi Valley. Compared with Simi Valley, Fountain Valley has 6°F (3°C) cooler summer days.
Simi Valley gets 14 in (367 mm) of rain a year and Fountain Valley 12 in (295 mm). August is the warmest month in both, with highs of 90°F (32°C) in Simi Valley and 83°F (28°C) in Fountain Valley.
Climate fingerprints: ring color = average temperature, thickness = rain. January at the top.
Month by month
Highs and lows (°F)
Simi ValleyFountain Valleysolid = high, dashed = low
Rain (in per month)
Simi ValleyFountain Valley
Monthly averages
| Month | High | Low | Rain | |||
|---|---|---|---|---|---|---|
| Simi Valley | Fountain Valley | Simi Valley | Fountain Valley | Simi Valley | Fountain Valley | |
| Jan | 67°F(20°C) | 69°F(21°C) | 44°F(7°C) | 47°F(8°C) | 3.2 in(81 mm) | 2.4 in(61 mm) |
| Feb | 67°F(19°C) | 69°F(21°C) | 44°F(7°C) | 48°F(9°C) | 3.2 in(82 mm) | 2.8 in(71 mm) |
| Mar | 69°F(21°C) | 71°F(21°C) | 45°F(7°C) | 50°F(10°C) | 2.2 in(55 mm) | 1.9 in(47 mm) |
| Apr | 73°F(23°C) | 73°F(23°C) | 47°F(8°C) | 52°F(11°C) | 1.1 in(27 mm) | 0.8 in(20 mm) |
| May | 76°F(24°C) | 74°F(24°C) | 51°F(11°C) | 57°F(14°C) | 0.2 in(5 mm) | 0.2 in(5 mm) |
| Jun | 80°F(27°C) | 77°F(25°C) | 55°F(13°C) | 60°F(16°C) | 0.0 in(1 mm) | 0.1 in(2 mm) |
| Jul | 87°F(31°C) | 81°F(27°C) | 59°F(15°C) | 64°F(18°C) | 0.0 in(0 mm) | 0.0 in(1 mm) |
| Aug | 90°F(32°C) | 83°F(28°C) | 60°F(16°C) | 65°F(18°C) | 0.0 in(0 mm) | 0.0 in(1 mm) |
| Sep | 88°F(31°C) | 83°F(28°C) | 58°F(14°C) | 63°F(17°C) | 0.1 in(3 mm) | 0.2 in(4 mm) |
| Oct | 82°F(28°C) | 79°F(26°C) | 54°F(12°C) | 58°F(14°C) | 0.5 in(12 mm) | 0.5 in(12 mm) |
| Nov | 74°F(24°C) | 74°F(24°C) | 48°F(9°C) | 51°F(10°C) | 1.5 in(38 mm) | 0.8 in(21 mm) |
| Dec | 67°F(20°C) | 69°F(20°C) | 43°F(6°C) | 46°F(8°C) | 2.5 in(63 mm) | 2.0 in(50 mm) |
1991–2020 averages, by calendar month.