Ventura vs Castro Valley Climate
75%matchVentura and Castro Valley are a 75% climate match. Compared with Ventura, Castro Valley has the same winter lows and 4°F (2°C) hotter summer days.
Ventura gets 14 in (361 mm) of rain a year and Castro Valley 17 in (441 mm). September is the warmest month in both, with highs of 77°F (25°C) in Ventura and 81°F (27°C) in Castro Valley.
Climate fingerprints: ring color = average temperature, thickness = rain. January at the top.
Month by month
Highs and lows (°F)
VenturaCastro Valleysolid = high, dashed = low
Rain (in per month)
VenturaCastro Valley
Monthly averages
| Month | High | Low | Rain | |||
|---|---|---|---|---|---|---|
| Ventura | Castro Valley | Ventura | Castro Valley | Ventura | Castro Valley | |
| Jan | 67°F(20°C) | 59°F(15°C) | 45°F(7°C) | 43°F(6°C) | 3.3 in(83 mm) | 3.5 in(89 mm) |
| Feb | 66°F(19°C) | 63°F(17°C) | 46°F(8°C) | 45°F(7°C) | 3.5 in(88 mm) | 3.3 in(83 mm) |
| Mar | 67°F(20°C) | 66°F(19°C) | 47°F(8°C) | 47°F(8°C) | 2.5 in(64 mm) | 2.5 in(63 mm) |
| Apr | 69°F(21°C) | 70°F(21°C) | 48°F(9°C) | 48°F(9°C) | 0.7 in(19 mm) | 1.3 in(33 mm) |
| May | 70°F(21°C) | 73°F(23°C) | 52°F(11°C) | 51°F(11°C) | 0.2 in(6 mm) | 0.6 in(14 mm) |
| Jun | 72°F(22°C) | 78°F(25°C) | 54°F(12°C) | 55°F(13°C) | 0.1 in(2 mm) | 0.2 in(4 mm) |
| Jul | 75°F(24°C) | 79°F(26°C) | 57°F(14°C) | 56°F(14°C) | 0.0 in(1 mm) | 0.0 in(1 mm) |
| Aug | 77°F(25°C) | 80°F(27°C) | 58°F(14°C) | 57°F(14°C) | 0.0 in(0 mm) | 0.0 in(1 mm) |
| Sep | 77°F(25°C) | 81°F(27°C) | 57°F(14°C) | 56°F(13°C) | 0.1 in(2 mm) | 0.1 in(2 mm) |
| Oct | 76°F(24°C) | 76°F(25°C) | 54°F(12°C) | 52°F(11°C) | 0.5 in(12 mm) | 1.0 in(26 mm) |
| Nov | 72°F(22°C) | 67°F(19°C) | 48°F(9°C) | 47°F(8°C) | 1.0 in(25 mm) | 1.9 in(47 mm) |
| Dec | 67°F(20°C) | 60°F(16°C) | 44°F(7°C) | 43°F(6°C) | 2.3 in(59 mm) | 3.1 in(78 mm) |
1991–2020 averages, by calendar month.