Boulder vs Casper Climate
71%matchBoulder vs Casper: a 71% climate match. Compared with Boulder, Casper has the same summer highs, less rain in summer, more humid air and 4°F (2°C) colder winter nights.
Boulder gets 17 in (421 mm) of rain a year and Casper 11 in (274 mm). July is the warmest month in both, with highs of 89°F (32°C) in Boulder and 89°F (32°C) in Casper.
Climate fingerprints: ring color = average temperature, thickness = rain. January at the top.
Month by month
Highs and lows (°F)
BoulderCaspersolid = high, dashed = low
Rain (in per month)
BoulderCasper
Monthly averages
| Month | High | Low | Rain | |||
|---|---|---|---|---|---|---|
| Boulder | Casper | Boulder | Casper | Boulder | Casper | |
| Jan | 47°F(8°C) | 37°F(3°C) | 19°F(-7°C) | 15°F(-10°C) | 0.6 in(15 mm) | 0.4 in(11 mm) |
| Feb | 47°F(8°C) | 38°F(3°C) | 20°F(-7°C) | 15°F(-9°C) | 0.7 in(18 mm) | 0.6 in(15 mm) |
| Mar | 56°F(13°C) | 48°F(9°C) | 27°F(-3°C) | 24°F(-5°C) | 1.5 in(39 mm) | 0.8 in(20 mm) |
| Apr | 63°F(17°C) | 56°F(14°C) | 34°F(1°C) | 30°F(-1°C) | 2.3 in(58 mm) | 1.3 in(32 mm) |
| May | 72°F(22°C) | 67°F(19°C) | 43°F(6°C) | 39°F(4°C) | 2.6 in(66 mm) | 2.2 in(56 mm) |
| Jun | 83°F(28°C) | 79°F(26°C) | 52°F(11°C) | 48°F(9°C) | 1.7 in(42 mm) | 1.4 in(35 mm) |
| Jul | 89°F(32°C) | 89°F(32°C) | 57°F(14°C) | 55°F(13°C) | 1.7 in(43 mm) | 0.9 in(22 mm) |
| Aug | 87°F(31°C) | 87°F(31°C) | 56°F(13°C) | 54°F(12°C) | 1.3 in(34 mm) | 0.5 in(12 mm) |
| Sep | 79°F(26°C) | 77°F(25°C) | 47°F(8°C) | 45°F(7°C) | 1.4 in(36 mm) | 0.8 in(20 mm) |
| Oct | 66°F(19°C) | 61°F(16°C) | 36°F(2°C) | 34°F(1°C) | 1.2 in(30 mm) | 0.9 in(24 mm) |
| Nov | 53°F(12°C) | 47°F(9°C) | 26°F(-3°C) | 25°F(-4°C) | 1.0 in(25 mm) | 0.6 in(14 mm) |
| Dec | 47°F(8°C) | 37°F(3°C) | 20°F(-7°C) | 17°F(-8°C) | 0.6 in(15 mm) | 0.5 in(13 mm) |
1991–2020 averages, by calendar month.