Last updated: March 2, 2024
The weather in Harriston, Canada, during December is characterized by an average temperature of -3°C (28°F). Highs can soar to 10°C (51°F), while lows may dip to -16°C (4°F). Typically, the humidity level in Harriston throughout December hovers around 87%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In December, Harriston averages 83 mm (3.2 inches) of rainfall, typically over the course of 17 rainy days. The month enjoys an average of 8 hours 56 minutes of daylight, with the sun shining for approximately 3 hours 8 minutes each day. Additionally, there is a 19% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In December, the UV Index in Harriston reaches a maximum of 2, indicating a level of Low exposure. The most intense UV radiation typically occurs between 11:00 and 13:00, during which unprotected skin may burn in as little as 45 minutes.
| 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UVI | 0 | 1 | 1 | 1 | 2 | 2 | 2 | 1 | 1 | 1 | 0 | 0 | 0 |
| Exposure | Low | ||||||||||||
| Time to burn | 45 min | ||||||||||||