Last updated: June 24, 2025
In May, the average temperature in Belle Fourche, United States is a pleasant 13°C (55°F). However, be prepared for a range, as temperatures can dip as low as -4°C (26°F) or soar up to 32°C (90°F). Expect 69 mm (2.7 in) of precipitation spread over 11 days, with an average humidity level of 76%.
In May in Belle Fourche, the average temperature is 13°C (55°F). The maximum can reach 32°C (90°F) and the minimum can be as low as -4°C (26°F). This means travelers should be prepared for a wide range of temperatures, making it advisable to pack layers for both warm and cool weather.
In Belle Fourche in May, the total precipitation amount is 69 mm (2.7 in) spread across 11 days.
In Belle Fourche in May humidity is 76%. With an average temperature of 13°C (55°F), this humidity feels like a damp, heavy blanket enveloping you, making it feel cooler than it actually is, which can be quite refreshing for short excursions but may also lead to discomfort during prolonged outdoor activities.
In Belle Fourche 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 Belle Fourche.
UV Risk Categories
Weather in Belle Fourche varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Belle Fourche, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (26°F) | 14 mm (0.6 inches) | 77% | low |
| February Weather | -6°C (22°F) | 25 mm (1.0 inches) | 80% | moderate |
| March Weather | 2°C (36°F) | 28 mm (1.1 inches) | 70% | moderate |
| April Weather | 6°C (43°F) | 59 mm (2.3 inches) | 70% | very high |
| May Weather | 13°C (55°F) | 69 mm (2.7 inches) | 76% | very high |
| June Weather | 21°C (69°F) | 44 mm (1.7 inches) | 84% | very high |
| July Weather | 24°C (75°F) | 60 mm (2.4 inches) | 85% | very high |
| August Weather | 22°C (72°F) | 36 mm (1.4 inches) | 84% | very high |
| September Weather | 17°C (63°F) | 33 mm (1.3 inches) | 77% | very high |
| October Weather | 8°C (46°F) | 49 mm (1.9 inches) | 73% | moderate |
| November Weather | 3°C (38°F) | 13 mm (0.5 inches) | 74% | moderate |
| December Weather | -1°C (30°F) | 22 mm (0.8 inches) | 79% | low |