Last updated: June 18, 2025
In Mistissini, Canada, the average temperature during December hovers around -12°C (10°F). Be prepared for chilly extremes, as temperatures can dip as low as -29°C (-19°F) and occasionally reach up to 6°C (43°F). Expect about 84 mm (3.3 in) of precipitation spread over 17 days, and brace yourself for a notable average humidity of 101%—a testament to the brisk, damp conditions that characterize this time of year.
In December, in Mistissini, the average temperature is -12°C (10°F), with maximums reaching 6°C (43°F) and minimums dropping as low as -29°C (-19°F). Travelers should prepare for extremely cold conditions and ensure they dress warmly to enjoy their visit.
In Mistissini in December, the precipitation amount is 84 mm (3.3 in) spread over 17 days, indicating a relatively wet period.
In Mistissini in December, humidity is 101%. With an average temperature of -12°C (10°F), this humidity feels like an icy blanket wrapping around you, making travel uncomfortable as the biting cold mixes with the dampness, seeping into your clothes and chilling you to the bone.
In Mistissini in December, the maximum UV index is 1, which corresponds to a low Exposure Category. This means you have a time to burn of 45 minutes. For more details, you can check the Hourly UV Index in Mistissini.
UV Risk Categories
Weather in Mistissini varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Mistissini, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -17°C (1°F) | 48 mm (1.9 inches) | 98% | low |
| February Weather | -16°C (3°F) | 51 mm (2.0 inches) | 94% | moderate |
| March Weather | -10°C (14°F) | 55 mm (2.2 inches) | 90% | moderate |
| April Weather | -2°C (28°F) | 64 mm (2.5 inches) | 84% | high |
| May Weather | 4°C (40°F) | 89 mm (3.5 inches) | 81% | very high |
| June Weather | 11°C (52°F) | 82 mm (3.2 inches) | 82% | very high |
| July Weather | 15°C (59°F) | 105 mm (4.1 inches) | 83% | very high |
| August Weather | 15°C (60°F) | 148 mm (5.8 inches) | 86% | high |
| September Weather | 11°C (51°F) | 151 mm (6.0 inches) | 89% | high |
| October Weather | 5°C (40°F) | 129 mm (5.1 inches) | 93% | moderate |
| November Weather | -4°C (26°F) | 122 mm (4.8 inches) | 98% | low |
| December Weather | -12°C (10°F) | 84 mm (3.3 inches) | 101% | low |