Average annual temperatures for Colorado (10°C/50°F) are slightly below the average for United States (13°C/55°F).
Average annual rainfall for Colorado (406mm/16 inches) is significantly below the average for United States (1,039mm/41 inches).
July is the hottest or warmest month in Colorado, with an average maximum temperate of 31°C/88°F.
January is the coolest or coldest month in Colorado, with an average minimum temperate of -9°C/16°F.
May is the wettest or most rainy month in Colorado, with an average rainfall of 69mm/3 inches.
December is the driest or least rainy month in Colorado, with an average rainfall of 17mm/1 inches.
Pueblo is the hottest or warmest place in Colorado, with an average maximum temperate of 12°C/54°F.
Loveland is the coldest place in Colorado, with an average maximum temperate of 10°C/50°F.
Boulder is the most rainy or wettest place in Colorado, with an average annual rainfall of 609mm/24 inches.
Longmont is the least rainy or driest place in Colorado, with an average annual rainfall of 176mm/7 inches.
| Place | Min Temp | Max Temp | Avg Temp | Rainfall |
|---|---|---|---|---|
| Arvada | 4 | 18 | 11 | 493 |
| Aurora | 3 | 19 | 11 | 420 |
| Boulder | 3 | 19 | 11 | 609 |
| Castle Rock | 3 | 19 | 11 | 423 |
| Centennial | 3 | 18 | 11 | 395 |
| Colorado Springs | 3 | 18 | 11 | 434 |
| Commerce City | 3 | 19 | 11 | 420 |
| Denver | 3 | 20 | 12 | 422 |
| Fort Collins | 3 | 19 | 11 | 426 |
| Grand Junction | 4 | 19 | 12 | 248 |
| Greeley | 3 | 20 | 12 | 402 |
| Highlands Ranch | 3 | 18 | 11 | 395 |
| Lakewood | 4 | 18 | 11 | 493 |
| Longmont | 2 | 19 | 10 | 176 |
| Loveland | 1 | 19 | 10 | 444 |
| Pueblo | 3 | 22 | 12 | 309 |
| Thornton | 3 | 20 | 11 | 403 |
| Westminster | 3 | 20 | 11 | 403 |