Last updated: June 24, 2025
In North Spearfish, United States, the average temperature in December hovers around -2°C (29°F). However, temperatures can swing dramatically, with a minimum of -25°C (-12°F) and a maximum reaching up to 20°C (68°F). During this month, you can expect about 32 mm (1.3 in) of precipitation over 8 days, and the average humidity is a notable 79%. Stay prepared for a mix of chilly days and potential rainfall!
In December in North Spearfish, the average temperature is -2°C (29°F). The maximum can reach 20°C (68°F) while the minimum can drop as low as -25°C (-12°F). It's essential to be prepared for a wide range of temperatures when traveling during this time.
In North Spearfish in December, the precipitation amount is 32 mm (1.3 in) over the course of 8 days.
In North Spearfish in December, humidity is 79%. With an average temperature of -2°C (29°F), this humidity feels like a heavy, bone-chilling dampness that can make traveling quite uncomfortable and intensifies the cold.
In North Spearfish in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in North Spearfish, you can visit Hourly UV Index in North Spearfish.
UV Risk Categories
Weather in North Spearfish varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in North Spearfish, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (26°F) | 23 mm (0.9 inches) | 77% | moderate |
| February Weather | -6°C (21°F) | 35 mm (1.4 inches) | 80% | moderate |
| March Weather | 1°C (35°F) | 40 mm (1.6 inches) | 70% | high |
| April Weather | 4°C (40°F) | 77 mm (3.0 inches) | 70% | very high |
| May Weather | 11°C (51°F) | 100 mm (3.9 inches) | 76% | very high |
| June Weather | 18°C (65°F) | 66 mm (2.6 inches) | 84% | extreme |
| July Weather | 22°C (71°F) | 93 mm (3.7 inches) | 85% | extreme |
| August Weather | 20°C (68°F) | 60 mm (2.4 inches) | 84% | very high |
| September Weather | 15°C (60°F) | 46 mm (1.8 inches) | 77% | very high |
| October Weather | 6°C (43°F) | 65 mm (2.6 inches) | 73% | moderate |
| November Weather | 2°C (36°F) | 23 mm (0.9 inches) | 74% | moderate |
| December Weather | -2°C (29°F) | 32 mm (1.3 inches) | 79% | low |