Last updated: June 18, 2025
In December, the average temperature in Peterborough, Canada hovers around -3°C (27°F). During this time, temperatures can plunge to a brisk -28°C (-19°F) or rise to a relatively mild 15°C (60°F). Expect about 74 mm (2.9 in) of precipitation spread across 12 days, contributing to a high average humidity of 91%.
In December in Peterborough, the average temperature is -3°C (27°F), with maximums reaching up to 15°C (60°F) and minimums dropping as low as -28°C (-19°F). Be prepared for a wide range of temperatures if you're traveling during this time.
In Peterborough in December, the precipitation amount is 74 mm (2.9 in) over a span of 12 days.
In Peterborough in December humidity is 91%. With an average temperature of -3°C (27°F), this humidity feels like a thick, icy blanket wrapping around you, making travel quite uncomfortable as every breath is a mix of frigid air and moisture, and the cold dampness clings to your skin, turning even short outings into a test of endurance.
In Peterborough 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 Peterborough, you can visit Hourly UV Index in Peterborough.
UV Risk Categories
Weather in Peterborough varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Peterborough, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -6°C (21°F) | 67 mm (2.7 inches) | 93% | low |
| February Weather | -5°C (23°F) | 72 mm (2.8 inches) | 94% | moderate |
| March Weather | -1°C (31°F) | 65 mm (2.6 inches) | 87% | moderate |
| April Weather | 6°C (42°F) | 116 mm (4.6 inches) | 82% | very high |
| May Weather | 13°C (56°F) | 105 mm (4.1 inches) | 74% | very high |
| June Weather | 19°C (66°F) | 99 mm (3.9 inches) | 68% | very high |
| July Weather | 22°C (72°F) | 93 mm (3.7 inches) | 67% | very high |
| August Weather | 21°C (69°F) | 118 mm (4.6 inches) | 67% | very high |
| September Weather | 17°C (62°F) | 82 mm (3.2 inches) | 74% | high |
| October Weather | 10°C (50°F) | 110 mm (4.4 inches) | 83% | moderate |
| November Weather | 2°C (36°F) | 85 mm (3.3 inches) | 89% | moderate |
| December Weather | -3°C (27°F) | 74 mm (2.9 inches) | 91% | low |