Last updated: June 24, 2025
In December, the average temperature in Hayden, United States hovers around 0°C (32°F). Visitors can expect a minimum chill of -15°C (4°F) and a more mild maximum of 16°C (60°F). With 110 mm (4.3 in) of precipitation falling over 16 days, it's wise to prepare for some wet weather. Notably, the average humidity levels are high at 90%, creating a crisp and cool atmosphere throughout the month.
In December in Hayden, the average temperature is 0°C (32°F). Maximum temperatures can reach 16°C (60°F), while minimums can drop as low as -15°C (4°F). Travelers should be prepared for a wide range of temperatures and dress in layers for comfort.
In Hayden in December, the precipitation amount is 110 mm (4.3 in) over a span of 16 days.
In Hayden in December, humidity is 90%. With an average temperature of 0°C (32°F), this humidity feels like an icy grip on your skin, making the air feel heavy and damp, which can turn traveling into a chilling experience where every step is met with a bone-cold embrace.
In Hayden 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 Hayden, you can visit Hourly UV Index in Hayden.
UV Risk Categories
Weather in Hayden varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Hayden, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -1°C (30°F) | 100 mm (4.0 inches) | 89% | low |
| February Weather | -2°C (29°F) | 103 mm (4.1 inches) | 89% | moderate |
| March Weather | 3°C (38°F) | 82 mm (3.2 inches) | 87% | moderate |
| April Weather | 7°C (45°F) | 80 mm (3.2 inches) | 84% | high |
| May Weather | 13°C (56°F) | 63 mm (2.5 inches) | 77% | very high |
| June Weather | 17°C (63°F) | 34 mm (1.3 inches) | 78% | very high |
| July Weather | 22°C (72°F) | 6 mm (0.3 inches) | 77% | very high |
| August Weather | 22°C (71°F) | 14 mm (0.6 inches) | 64% | very high |
| September Weather | 16°C (61°F) | 44 mm (1.7 inches) | 62% | high |
| October Weather | 8°C (47°F) | 85 mm (3.3 inches) | 79% | moderate |
| November Weather | 3°C (38°F) | 115 mm (4.5 inches) | 87% | moderate |
| December Weather | 0°C (32°F) | 110 mm (4.3 inches) | 90% | low |