Last updated: June 24, 2025
In Jaffrey, United States during December, the average temperature hovers around -2°C (29°F). However, be prepared for extremes, as temperatures can plunge to a chilling -22°C (-8°F) or reach a mild 16°C (62°F). Expect precipitation totaling 125 mm (4.9 in) over 9 days, and don't forget your umbrella! With an average humidity of 81%, it’s safe to say you’ll feel the damp chill in the air.
In December in Jaffrey, the average temperature is -2°C (29°F), with maximums reaching 16°C (62°F) and minimums dropping as low as -22°C (-8°F). Travelers should be prepared for a wide temperature range and pack accordingly for both chilly and mild weather conditions.
In Jaffrey in December, the total precipitation amount is 125 mm (4.9 in) recorded over a span of 9 days.
In Jaffrey in December humidity is 81%. With an average temperature of -2°C (29°F), this humidity feels like an uncomfortable chill that seeps into your bones, making outdoor activities less enjoyable and requiring extra layers to stay warm while traveling.
In Jaffrey 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 Jaffrey, you can visit Hourly UV Index in Jaffrey.
UV Risk Categories
Weather in Jaffrey varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Jaffrey, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (26°F) | 76 mm (3.0 inches) | 86% | moderate |
| February Weather | -2°C (28°F) | 90 mm (3.6 inches) | 84% | moderate |
| March Weather | 1°C (34°F) | 84 mm (3.3 inches) | 82% | high |
| April Weather | 7°C (46°F) | 132 mm (5.2 inches) | 80% | very high |
| May Weather | 14°C (57°F) | 90 mm (3.5 inches) | 72% | very high |
| June Weather | 20°C (67°F) | 89 mm (3.5 inches) | 72% | very high |
| July Weather | 22°C (73°F) | 151 mm (5.9 inches) | 67% | very high |
| August Weather | 22°C (71°F) | 102 mm (4.0 inches) | 66% | very high |
| September Weather | 17°C (64°F) | 88 mm (3.5 inches) | 71% | high |
| October Weather | 11°C (53°F) | 136 mm (5.4 inches) | 78% | high |
| November Weather | 3°C (39°F) | 104 mm (4.1 inches) | 84% | moderate |
| December Weather | -2°C (29°F) | 125 mm (4.9 inches) | 81% | low |