Last updated: June 24, 2025
In December, the average temperature in East Rochester, United States hovers around 0°C (32°F). Expect chilly lows of -17°C (2°F) and occasional highs of 18°C (65°F). With an average precipitation of 85 mm (3.3 in) spread over 15 days, the atmosphere remains quite damp, with an average humidity level of 87%. Whether you're bundled up or braving the elements, be prepared for a true winter experience!
In December in East Rochester, the average temperature is 0°C (32°F). Maximums can reach 18°C (65°F) and minimums can be as low as -17°C (2°F). Be prepared for a wide temperature range and dress in layers for your travels!
In East Rochester in December, the total precipitation amount is 85 mm (3.3 in) spread over a period of 15 days.
In East Rochester in December, humidity is 87%. With an average temperature of 0°C (32°F), this humidity feels like a damp chill that clings to your skin, making travel uncomfortable and cold, as each breath brings a heavy moisture that seeps into your clothes.
In East Rochester 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 East Rochester, you can visit Hourly UV Index in East Rochester.
UV Risk Categories
Weather in East Rochester varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in East Rochester, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -3°C (27°F) | 76 mm (3.0 inches) | 91% | low |
| February Weather | -2°C (29°F) | 79 mm (3.1 inches) | 91% | moderate |
| March Weather | 2°C (35°F) | 73 mm (2.9 inches) | 88% | moderate |
| April Weather | 8°C (46°F) | 112 mm (4.4 inches) | 88% | very high |
| May Weather | 15°C (59°F) | 109 mm (4.3 inches) | 82% | very high |
| June Weather | 20°C (68°F) | 83 mm (3.3 inches) | 79% | very high |
| July Weather | 23°C (73°F) | 140 mm (5.5 inches) | 77% | very high |
| August Weather | 22°C (71°F) | 95 mm (3.8 inches) | 72% | very high |
| September Weather | 18°C (65°F) | 73 mm (2.9 inches) | 76% | high |
| October Weather | 12°C (54°F) | 140 mm (5.5 inches) | 83% | moderate |
| November Weather | 4°C (40°F) | 84 mm (3.3 inches) | 88% | moderate |
| December Weather | 0°C (32°F) | 85 mm (3.3 inches) | 87% | low |