Casper in May
6.9out of 10
Possible, with caveats
Mild: highs around 18°C. Frequent rain: about 11 rainy days.
18°CAvg high
4°CAvg low
11Rainy days (69 mm)
14:27 hDaylight
05:48Sunrise · 20:15 Sunset
Why this score
- Mild: highs around 18°C
- Frequent rain: about 11 rainy days
- Rain varies a lot between years (±4.6 days)
What to wear and pack
- Layers you can add or remove
- Rain jacket or compact umbrella
How reliable is the forecast?
Rain in May varies a lot between years (±4.6 rainy days), so check the forecast closer to your trip. Averages cover 30 years (1991–2020). Individual days can differ a lot.
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 |
Frequently asked questions
How hot is Casper in May?
Daytime highs average 18°C and nights about 4°C.
When is the best time to visit Casper?
The best months are August, September, June, July.