Casper Climate: Weather by Month and Best Time to Visit
Best months for Casper: August, September, June, July.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | -1°C | -11°C | 20 mm | 6 | – | – | 4.4 |
| February | 0°C | -10°C | 25 mm | 5 | – | – | 4.4 |
| March | 7°C | -5°C | 37 mm | 7 | – | – | 5.2 |
| April | 11°C | -1°C | 59 mm | 11 | – | – | 5.7 |
| May | 18°C | 4°C | 69 mm | 11 | – | – | 6.9 |
| June | 25°C | 9°C | 34 mm | 7 | – | – | 8.2 |
| July | 30°C | 14°C | 19 mm | 5 | – | – | 8.2 |
| August | 29°C | 13°C | 14 mm | 4 | – | – | 8.6 |
| September | 23°C | 8°C | 29 mm | 6 | – | – | 8.3 |
| October | 14°C | 1°C | 45 mm | 7 | – | – | 6.7 |
| November | 5°C | -4°C | 27 mm | 6 | – | – | 5.3 |
| December | -1°C | -10°C | 23 mm | 6 | – | – | 4.3 |