San Bernardino vs Rancho Cucamonga Climate
97%matchOn climate, Rancho Cucamonga is a 97% match for San Bernardino. Compared with San Bernardino, Rancho Cucamonga has the same winter lows and 4°F (2°C) cooler summer days.
San Bernardino gets 11 in (272 mm) of rain a year and Rancho Cucamonga 13 in (336 mm). August is the warmest month in both, with highs of 97°F (36°C) in San Bernardino and 93°F (34°C) in Rancho Cucamonga.
Climate fingerprints: ring color = average temperature, thickness = rain. January at the top.
Month by month
Highs and lows (°F)
San BernardinoRancho Cucamongasolid = high, dashed = low
Rain (in per month)
San BernardinoRancho Cucamonga
Monthly averages
| Month | High | Low | Rain | |||
|---|---|---|---|---|---|---|
| San Bernardino | Rancho Cucamonga | San Bernardino | Rancho Cucamonga | San Bernardino | Rancho Cucamonga | |
| Jan | 68°F(20°C) | 68°F(20°C) | 43°F(6°C) | 43°F(6°C) | 2.2 in(55 mm) | 2.7 in(69 mm) |
| Feb | 69°F(21°C) | 68°F(20°C) | 44°F(7°C) | 43°F(6°C) | 2.6 in(66 mm) | 3.0 in(77 mm) |
| Mar | 73°F(23°C) | 71°F(22°C) | 47°F(8°C) | 46°F(8°C) | 1.7 in(42 mm) | 2.0 in(51 mm) |
| Apr | 78°F(26°C) | 76°F(24°C) | 49°F(10°C) | 48°F(9°C) | 0.8 in(21 mm) | 1.1 in(28 mm) |
| May | 82°F(28°C) | 79°F(26°C) | 55°F(13°C) | 53°F(12°C) | 0.3 in(7 mm) | 0.3 in(8 mm) |
| Jun | 89°F(32°C) | 85°F(30°C) | 59°F(15°C) | 57°F(14°C) | 0.1 in(2 mm) | 0.0 in(1 mm) |
| Jul | 96°F(35°C) | 91°F(33°C) | 64°F(18°C) | 61°F(16°C) | 0.1 in(2 mm) | 0.0 in(1 mm) |
| Aug | 97°F(36°C) | 93°F(34°C) | 65°F(18°C) | 63°F(17°C) | 0.1 in(3 mm) | 0.1 in(2 mm) |
| Sep | 93°F(34°C) | 90°F(32°C) | 61°F(16°C) | 60°F(16°C) | 0.2 in(5 mm) | 0.2 in(5 mm) |
| Oct | 85°F(29°C) | 82°F(28°C) | 54°F(12°C) | 54°F(12°C) | 0.4 in(11 mm) | 0.4 in(11 mm) |
| Nov | 76°F(24°C) | 74°F(24°C) | 46°F(8°C) | 46°F(8°C) | 0.7 in(17 mm) | 1.1 in(27 mm) |
| Dec | 68°F(20°C) | 67°F(20°C) | 41°F(5°C) | 41°F(5°C) | 1.6 in(41 mm) | 2.2 in(56 mm) |
1991–2020 averages, by calendar month.