Boulder vs Rapid City Climate
60%matchOn climate, Rapid City is a 60% match for Boulder. Compared with Boulder, Rapid City has less sun, more humid air and 4°F (2°C) colder winter nights.
Boulder gets 17 in (421 mm) of rain a year and Rapid City 17 in (441 mm). July is the warmest month in both, with highs of 89°F (32°C) in Boulder and 87°F (30°C) in Rapid City.
Climate fingerprints: ring color = average temperature, thickness = rain. January at the top.
Month by month
Highs and lows (°F)
BoulderRapid Citysolid = high, dashed = low
Rain (in per month)
BoulderRapid City
Monthly averages
| Month | High | Low | Rain | |||
|---|---|---|---|---|---|---|
| Boulder | Rapid City | Boulder | Rapid City | Boulder | Rapid City | |
| Jan | 47°F(8°C) | 39°F(4°C) | 19°F(-7°C) | 14°F(-10°C) | 0.6 in(15 mm) | 0.3 in(7 mm) |
| Feb | 47°F(8°C) | 40°F(5°C) | 20°F(-7°C) | 15°F(-9°C) | 0.7 in(18 mm) | 0.4 in(10 mm) |
| Mar | 56°F(13°C) | 50°F(10°C) | 27°F(-3°C) | 24°F(-5°C) | 1.5 in(39 mm) | 0.8 in(21 mm) |
| Apr | 63°F(17°C) | 58°F(14°C) | 34°F(1°C) | 32°F(0°C) | 2.3 in(58 mm) | 2.0 in(50 mm) |
| May | 72°F(22°C) | 67°F(20°C) | 43°F(6°C) | 43°F(6°C) | 2.6 in(66 mm) | 3.4 in(86 mm) |
| Jun | 83°F(28°C) | 78°F(26°C) | 52°F(11°C) | 52°F(11°C) | 1.7 in(42 mm) | 3.1 in(80 mm) |
| Jul | 89°F(32°C) | 87°F(30°C) | 57°F(14°C) | 59°F(15°C) | 1.7 in(43 mm) | 2.2 in(55 mm) |
| Aug | 87°F(31°C) | 85°F(30°C) | 56°F(13°C) | 57°F(14°C) | 1.3 in(34 mm) | 1.9 in(49 mm) |
| Sep | 79°F(26°C) | 77°F(25°C) | 47°F(8°C) | 47°F(8°C) | 1.4 in(36 mm) | 1.1 in(29 mm) |
| Oct | 66°F(19°C) | 62°F(17°C) | 36°F(2°C) | 34°F(1°C) | 1.2 in(30 mm) | 1.4 in(36 mm) |
| Nov | 53°F(12°C) | 49°F(9°C) | 26°F(-3°C) | 23°F(-5°C) | 1.0 in(25 mm) | 0.4 in(10 mm) |
| Dec | 47°F(8°C) | 41°F(5°C) | 20°F(-7°C) | 16°F(-9°C) | 0.6 in(15 mm) | 0.3 in(8 mm) |
1991–2020 averages, by calendar month.