Last updated: June 24, 2025
In December, the average temperature in East Rochester, United States hovers around 2°C (36°F), presenting a chilly atmosphere. Temperatures can dip as low as -15°C (4°F) and reach a maximum of 17°C (63°F). Expect about 99 mm (3.9 in) of precipitation spread over 11 days, contributing to the average humidity level of 86%. Prepare for a wet and cool month!
In December in East Rochester, the average temperature is 2°C (36°F), with maximums reaching 17°C (63°F) and minimums dropping as low as -15°C (4°F). Travelers should be prepared for a wide range of temperatures and pack accordingly to enjoy their visit.
In East Rochester, in December, the precipitation amount is 99 mm (3.9 in) over the course of 11 days.
In East Rochester in December, humidity is 86%. With an average temperature of 2°C (36°F), this humidity feels like a biting chill that clings to your skin, making outdoor exploration uncomfortable and dampening any enthusiasm for travel.
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 | -1°C (30°F) | 95 mm (3.7 inches) | 88% | moderate |
| February Weather | 1°C (34°F) | 113 mm (4.5 inches) | 88% | moderate |
| March Weather | 5°C (41°F) | 103 mm (4.1 inches) | 87% | high |
| April Weather | 10°C (51°F) | 133 mm (5.2 inches) | 87% | very high |
| May Weather | 16°C (62°F) | 136 mm (5.4 inches) | 81% | very high |
| June Weather | 21°C (70°F) | 136 mm (5.3 inches) | 83% | very high |
| July Weather | 24°C (75°F) | 135 mm (5.3 inches) | 82% | very high |
| August Weather | 22°C (73°F) | 88 mm (3.5 inches) | 76% | very high |
| September Weather | 19°C (67°F) | 117 mm (4.6 inches) | 77% | very high |
| October Weather | 14°C (57°F) | 124 mm (4.9 inches) | 82% | high |
| November Weather | 5°C (42°F) | 97 mm (3.8 inches) | 89% | moderate |
| December Weather | 2°C (36°F) | 99 mm (3.9 inches) | 86% | low |