Last updated: June 24, 2025
In December, the average temperature in Terra Alta, United States hovers around 1°C (34°F). Temperature extremes range from a chilly -23°C (-10°F) to a mild 18°C (64°F). Expect 131 mm (5.2 in) of precipitation over 16 days, contributing to a high average humidity of 85%. Prepare for a blend of cold and wet conditions!
In December in Terra Alta, the average temperature is 1°C (34°F), with maximums reaching 18°C (64°F) and minimums dropping as low as -23°C (-10°F). Be prepared for a wide range of temperatures, making it essential to pack layers for your trip.
In Terra Alta in December, the precipitation amount is 131 mm (5.2 in) during 16 days, indicating a relatively wet period for the region.
In Terra Alta in December, humidity is 85%. With an average temperature of 1°C (34°F), this humidity feels like a biting chill that seeps into your bones, making outdoor travel uncomfortable and urging you to seek warmth indoors rather than explore the surroundings.
In Terra Alta in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Terra Alta, you can check the information here.
UV Risk Categories
Weather in Terra Alta varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Terra Alta, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -2°C (29°F) | 98 mm (3.8 inches) | 86% | moderate |
| February Weather | 1°C (34°F) | 153 mm (6.0 inches) | 86% | moderate |
| March Weather | 4°C (39°F) | 124 mm (4.9 inches) | 86% | high |
| April Weather | 9°C (49°F) | 156 mm (6.1 inches) | 84% | very high |
| May Weather | 15°C (59°F) | 171 mm (6.7 inches) | 78% | very high |
| June Weather | 19°C (66°F) | 152 mm (6.0 inches) | 79% | very high |
| July Weather | 21°C (71°F) | 116 mm (4.6 inches) | 70% | very high |
| August Weather | 20°C (69°F) | 114 mm (4.5 inches) | 59% | very high |
| September Weather | 18°C (64°F) | 120 mm (4.7 inches) | 68% | very high |
| October Weather | 12°C (54°F) | 118 mm (4.7 inches) | 80% | high |
| November Weather | 4°C (40°F) | 92 mm (3.6 inches) | 86% | moderate |
| December Weather | 1°C (34°F) | 131 mm (5.2 inches) | 85% | moderate |