Last updated: June 24, 2025
In December, the average temperature in O'Neill, United States hovers around -2°C (29°F). While you might experience a bone-chilling minimum of -25°C (-12°F), temperatures can occasionally rise to a pleasant 20°C (68°F). Expect about 44 mm (1.7 in) of precipitation spread over four days, with an average humidity level of 79%, ensuring a crisp, refreshing atmosphere.
In December in O'Neill, 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 O'Neill in December, the precipitation amount is 44 mm (1.7 in) over the course of 4 days.
In O'Neill 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 O'Neill 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 O'Neill, you can visit Hourly UV Index in O'Neill.
UV Risk Categories
Weather in O'Neill varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in O'Neill, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -5°C (24°F) | 23 mm (0.9 inches) | 77% | moderate |
| February Weather | -5°C (23°F) | 24 mm (0.9 inches) | 81% | moderate |
| March Weather | 3°C (37°F) | 73 mm (2.9 inches) | 71% | high |
| April Weather | 7°C (46°F) | 62 mm (2.4 inches) | 75% | very high |
| May Weather | 15°C (59°F) | 134 mm (5.3 inches) | 74% | very high |
| June Weather | 23°C (73°F) | 87 mm (3.4 inches) | 82% | very high |
| July Weather | 24°C (76°F) | 95 mm (3.7 inches) | 84% | very high |
| August Weather | 22°C (73°F) | 89 mm (3.5 inches) | 82% | very high |
| September Weather | 19°C (67°F) | 65 mm (2.5 inches) | 75% | very high |
| October Weather | 9°C (49°F) | 72 mm (2.8 inches) | 72% | high |
| November Weather | 3°C (38°F) | 24 mm (0.9 inches) | 81% | moderate |
| December Weather | -2°C (29°F) | 44 mm (1.7 inches) | 79% | low |