Last updated: June 24, 2025
In December, the average temperature in Exeter, United States hovers around 0°C (33°F), with a minimum dipping to -16°C (3°F) and a maximum reaching 16°C (60°F). Expect 90 mm (3.5 in) of precipitation spread over 12 days, contributing to an average humidity of 85%. Whether you're braving the chill or enjoying the mild days, be prepared for a weather experience that's both crisp and refreshing!
In December in Exeter, the average temperature is 0°C (33°F), with a maximum that can reach 16°C (60°F) and a minimum that can drop as low as -16°C (3°F). Travelers should be prepared for a wide range of temperatures and dress accordingly for their visit.
In Exeter in December, the precipitation amount is 90 mm (3.5 in) spread over 12 days.
In Exeter in December, humidity is 85%. With an average temperature of 0°C (33°F), this humidity feels like a heavy blanket, making the air feel colder and more biting, while creating an uncomfortable clamminess that can dampen the thrill of traveling.
In Exeter 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 Exeter, you can visit Hourly UV Index in Exeter.
UV Risk Categories
Weather in Exeter varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Exeter, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -2°C (28°F) | 72 mm (2.8 inches) | 87% | moderate |
| February Weather | -1°C (31°F) | 98 mm (3.9 inches) | 85% | moderate |
| March Weather | 2°C (37°F) | 91 mm (3.6 inches) | 85% | high |
| April Weather | 9°C (48°F) | 108 mm (4.2 inches) | 83% | very high |
| May Weather | 15°C (59°F) | 127 mm (5.0 inches) | 75% | very high |
| June Weather | 19°C (67°F) | 106 mm (4.2 inches) | 73% | very high |
| July Weather | 23°C (73°F) | 133 mm (5.2 inches) | 65% | very high |
| August Weather | 21°C (71°F) | 139 mm (5.5 inches) | 62% | very high |
| September Weather | 18°C (64°F) | 107 mm (4.2 inches) | 66% | very high |
| October Weather | 12°C (55°F) | 122 mm (4.8 inches) | 79% | high |
| November Weather | 4°C (40°F) | 89 mm (3.5 inches) | 87% | moderate |
| December Weather | 0°C (33°F) | 90 mm (3.5 inches) | 85% | low |