Last updated: June 24, 2025
In Heart Butte, United States during May, the average temperature is a crisp 8°C (47°F). Visitors can experience temperature fluctuations, with a minimum reaching a chilly -10°C (15°F) and a maximum soaring to 25°C (77°F). Expect 97 mm (3.8 in) of precipitation over 13 days, coupled with an average humidity level of 78%.
In May in Heart Butte, the average temperature is 8°C (47°F). Maximum temperatures can reach 25°C (77°F), while the minimum can drop as low as -10°C (15°F). Be prepared for a wide range of temperatures when traveling to Heart Butte during this time.
In Heart Butte in May, the precipitation amount is 97 mm (3.8 in) over the course of 13 days.
In Heart Butte in May, humidity is 78%. With an average temperature of 8°C (47°F), this humidity feels like a chilly embrace, making travel invigorating yet damp, as the cool air wraps around you, emphasizing the need for layers to stay comfortable while exploring.
In Heart Butte in May, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Heart Butte.
UV Risk Categories
Weather in Heart Butte varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Heart Butte, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -5°C (23°F) | 25 mm (1.0 inches) | 93% | low |
| February Weather | -9°C (16°F) | 60 mm (2.4 inches) | 91% | moderate |
| March Weather | -2°C (29°F) | 39 mm (1.5 inches) | 88% | moderate |
| April Weather | 2°C (35°F) | 69 mm (2.7 inches) | 84% | very high |
| May Weather | 8°C (47°F) | 97 mm (3.8 inches) | 78% | very high |
| June Weather | 13°C (56°F) | 81 mm (3.2 inches) | 77% | very high |
| July Weather | 18°C (64°F) | 27 mm (1.1 inches) | 79% | very high |
| August Weather | 17°C (62°F) | 31 mm (1.2 inches) | 69% | very high |
| September Weather | 11°C (53°F) | 52 mm (2.1 inches) | 69% | high |
| October Weather | 3°C (38°F) | 52 mm (2.1 inches) | 78% | moderate |
| November Weather | -1°C (31°F) | 48 mm (1.9 inches) | 87% | moderate |
| December Weather | -5°C (24°F) | 43 mm (1.7 inches) | 94% | low |