Last updated: June 24, 2025
In December, the average temperature in Caribou, United States hovers around -7°C (19°F), with extremes that can dip to a chilling -26°C (-15°F) and occasionally rise to a mild 15°C (59°F). Expect 98 mm (3.9 in) of precipitation spread over about 10 days, contributing to an average humidity of 90% that underscores the winter chill.
In December in Caribou, the average temperature is -7°C (19°F), with maximums reaching 15°C (59°F) and minimums dropping as low as -26°C (-15°F). This wide temperature range means travelers should prepare for both chilly conditions and the possibility of milder weather during their visit.
In Caribou in December, the total precipitation amount is 98 mm (3.9 in) recorded over a span of 10 days.
In Caribou in December humidity is 90%. With an average temperature of -7°C (19°F), this humidity feels like a biting chill that penetrates your clothes, making every step outside feel daunting and your breath visible in the frosty air, creating a harsh environment for traveling.
In Caribou 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 Caribou, you can visit Hourly UV Index in Caribou.
UV Risk Categories
Weather in Caribou varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Caribou, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -10°C (14°F) | 92 mm (3.6 inches) | 93% | low |
| February Weather | -9°C (16°F) | 75 mm (3.0 inches) | 92% | moderate |
| March Weather | -4°C (25°F) | 74 mm (2.9 inches) | 90% | moderate |
| April Weather | 3°C (38°F) | 110 mm (4.3 inches) | 87% | high |
| May Weather | 11°C (52°F) | 102 mm (4.0 inches) | 82% | very high |
| June Weather | 16°C (62°F) | 90 mm (3.5 inches) | 77% | very high |
| July Weather | 19°C (67°F) | 99 mm (3.9 inches) | 81% | very high |
| August Weather | 19°C (66°F) | 78 mm (3.1 inches) | 83% | very high |
| September Weather | 14°C (57°F) | 104 mm (4.1 inches) | 85% | high |
| October Weather | 8°C (46°F) | 107 mm (4.2 inches) | 87% | moderate |
| November Weather | 0°C (32°F) | 113 mm (4.4 inches) | 87% | moderate |
| December Weather | -7°C (19°F) | 98 mm (3.9 inches) | 90% | low |