Riverside vs Simi Valley Climate
90%matchRiverside vs Simi Valley: a 90% climate match. Compared with Riverside, Simi Valley has the same winter lows and 5°F (3°C) cooler summer days.
Riverside gets 12 in (294 mm) of rain a year and Simi Valley 14 in (367 mm). August is the warmest month in both, with highs of 95°F (35°C) in Riverside and 90°F (32°C) in Simi Valley.
Climate fingerprints: ring color = average temperature, thickness = rain. January at the top.
Month by month
Highs and lows (°F)
RiversideSimi Valleysolid = high, dashed = low
Rain (in per month)
RiversideSimi Valley
Monthly averages
| Month | High | Low | Rain | |||
|---|---|---|---|---|---|---|
| Riverside | Simi Valley | Riverside | Simi Valley | Riverside | Simi Valley | |
| Jan | 68°F(20°C) | 67°F(20°C) | 43°F(6°C) | 44°F(7°C) | 2.4 in(60 mm) | 3.2 in(81 mm) |
| Feb | 69°F(21°C) | 67°F(19°C) | 44°F(7°C) | 44°F(7°C) | 2.7 in(68 mm) | 3.2 in(82 mm) |
| Mar | 72°F(22°C) | 69°F(21°C) | 46°F(8°C) | 45°F(7°C) | 1.8 in(45 mm) | 2.2 in(55 mm) |
| Apr | 77°F(25°C) | 73°F(23°C) | 49°F(10°C) | 47°F(8°C) | 0.9 in(22 mm) | 1.1 in(27 mm) |
| May | 80°F(27°C) | 76°F(24°C) | 54°F(12°C) | 51°F(11°C) | 0.3 in(7 mm) | 0.2 in(5 mm) |
| Jun | 86°F(30°C) | 80°F(27°C) | 58°F(14°C) | 55°F(13°C) | 0.1 in(2 mm) | 0.0 in(1 mm) |
| Jul | 92°F(34°C) | 87°F(31°C) | 62°F(17°C) | 59°F(15°C) | 0.1 in(2 mm) | 0.0 in(0 mm) |
| Aug | 95°F(35°C) | 90°F(32°C) | 63°F(17°C) | 60°F(16°C) | 0.1 in(2 mm) | 0.0 in(0 mm) |
| Sep | 91°F(33°C) | 88°F(31°C) | 60°F(16°C) | 58°F(14°C) | 0.2 in(5 mm) | 0.1 in(3 mm) |
| Oct | 83°F(29°C) | 82°F(28°C) | 54°F(12°C) | 54°F(12°C) | 0.4 in(11 mm) | 0.5 in(12 mm) |
| Nov | 75°F(24°C) | 74°F(24°C) | 47°F(8°C) | 48°F(9°C) | 0.9 in(22 mm) | 1.5 in(38 mm) |
| Dec | 68°F(20°C) | 67°F(20°C) | 42°F(6°C) | 43°F(6°C) | 1.9 in(48 mm) | 2.5 in(63 mm) |
1991–2020 averages, by calendar month.