Last updated: March 2, 2024
The weather in Heart Butte, United States, during May is characterized by an average temperature of 8°C (47°F). Highs can soar to 23°C (74°F), while lows may dip to -5°C (24°F). Typically, the humidity level in Heart Butte throughout May hovers around 78%.
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Average temperature
Maximum temperature
Humidity
In May, Heart Butte averages 97 mm (3.8 inches) of rainfall, typically over the course of 13 rainy days. The month enjoys an average of 15 hours 14 minutes of daylight, with the sun shining for approximately 10 hours 1 minutes each day. Additionally, there is a 44% probability of sunny days during this period.
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Chance of sun
In May, the UV Index in Heart Butte reaches a maximum of 9, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 13:00 and 15:00, during which unprotected skin may burn in as little as 15 minutes.
| 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UVI | 1 | 2 | 3 | 4 | 6 | 8 | 9 | 9 | 7 | 6 | 4 | 2 | 1 |
| Exposure | Low | Moderate | High | VeryHigh | High | Moderate | Low | ||||||
| Time to burn | 45 min | 30 min | 25 min | 15 min | 25 min | 30 min | 45 min | ||||||