Last updated: June 18, 2025
In Lethbridge, Canada, the average temperature in December hovers around -4°C (26°F). However, be prepared for extremes, as temperatures can plummet to a chilling -35°C (-31°F) or rise to a mild 16°C (61°F). Expect approximately 22 mm (0.8 in) of precipitation over 5 days in this month, paired with a notably high average humidity of 94%. Stay warm and dry!
In December in Lethbridge, the average temperature is -4°C (26°F). The maximum can reach 16°C (61°F), while the minimum can drop as low as -35°C (-31°F). Travelers should be prepared for a wide range of temperatures during this time.
In Lethbridge in December, the precipitation amount is 22 mm (0.8 in) over the course of 5 days.
In Lethbridge in December, humidity is 94%. With an average temperature of -4°C (26°F), this humidity feels like a bone-chilling dampness that penetrates your clothes, making travel uncomfortable and necessitating extra layers just to stay warm while battling the wet cold.
In Lethbridge 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 Lethbridge, you can visit Hourly UV Index in Lethbridge.
UV Risk Categories
Weather in Lethbridge varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Lethbridge, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -5°C (24°F) | 10 mm (0.4 inches) | 93% | low |
| February Weather | -9°C (17°F) | 31 mm (1.2 inches) | 91% | moderate |
| March Weather | -1°C (31°F) | 23 mm (0.9 inches) | 88% | moderate |
| April Weather | 4°C (40°F) | 35 mm (1.4 inches) | 84% | high |
| May Weather | 12°C (53°F) | 56 mm (2.2 inches) | 78% | very high |
| June Weather | 16°C (62°F) | 62 mm (2.4 inches) | 77% | very high |
| July Weather | 19°C (67°F) | 28 mm (1.1 inches) | 79% | very high |
| August Weather | 19°C (66°F) | 25 mm (1.0 inches) | 69% | very high |
| September Weather | 13°C (56°F) | 35 mm (1.4 inches) | 69% | high |
| October Weather | 5°C (42°F) | 35 mm (1.4 inches) | 78% | moderate |
| November Weather | 1°C (33°F) | 34 mm (1.3 inches) | 87% | low |
| December Weather | -4°C (26°F) | 22 mm (0.8 inches) | 94% | low |