San Bernardino vs Altadena Climate
90%matchOn climate, Altadena is a 90% match for San Bernardino. Compared with San Bernardino, Altadena has the same winter lows, 7°F (4°C) cooler summer days and more rain in winter.
San Bernardino gets 11 in (272 mm) of rain a year and Altadena 16 in (413 mm). August is the warmest month in both, with highs of 97°F (36°C) in San Bernardino and 91°F (33°C) in Altadena.
Climate fingerprints: ring color = average temperature, thickness = rain. January at the top.
Month by month
Highs and lows (°F)
San BernardinoAltadenasolid = high, dashed = low
Rain (in per month)
San BernardinoAltadena
Monthly averages
| Month | High | Low | Rain | |||
|---|---|---|---|---|---|---|
| San Bernardino | Altadena | San Bernardino | Altadena | San Bernardino | Altadena | |
| Jan | 68°F(20°C) | 68°F(20°C) | 43°F(6°C) | 43°F(6°C) | 2.2 in(55 mm) | 3.4 in(87 mm) |
| Feb | 69°F(21°C) | 67°F(20°C) | 44°F(7°C) | 44°F(7°C) | 2.6 in(66 mm) | 3.9 in(98 mm) |
| Mar | 73°F(23°C) | 70°F(21°C) | 47°F(8°C) | 46°F(8°C) | 1.7 in(42 mm) | 2.7 in(68 mm) |
| Apr | 78°F(26°C) | 74°F(23°C) | 49°F(10°C) | 48°F(9°C) | 0.8 in(21 mm) | 1.3 in(32 mm) |
| May | 82°F(28°C) | 77°F(25°C) | 55°F(13°C) | 53°F(12°C) | 0.3 in(7 mm) | 0.3 in(8 mm) |
| Jun | 89°F(32°C) | 82°F(28°C) | 59°F(15°C) | 57°F(14°C) | 0.1 in(2 mm) | 0.1 in(3 mm) |
| Jul | 96°F(35°C) | 89°F(32°C) | 64°F(18°C) | 61°F(16°C) | 0.1 in(2 mm) | 0.1 in(2 mm) |
| Aug | 97°F(36°C) | 91°F(33°C) | 65°F(18°C) | 62°F(17°C) | 0.1 in(3 mm) | 0.0 in(1 mm) |
| Sep | 93°F(34°C) | 88°F(31°C) | 61°F(16°C) | 60°F(15°C) | 0.2 in(5 mm) | 0.2 in(4 mm) |
| Oct | 85°F(29°C) | 81°F(27°C) | 54°F(12°C) | 54°F(12°C) | 0.4 in(11 mm) | 0.6 in(15 mm) |
| Nov | 76°F(24°C) | 73°F(23°C) | 46°F(8°C) | 47°F(8°C) | 0.7 in(17 mm) | 1.2 in(31 mm) |
| Dec | 68°F(20°C) | 67°F(19°C) | 41°F(5°C) | 43°F(6°C) | 1.6 in(41 mm) | 2.5 in(64 mm) |
1991–2020 averages, by calendar month.