Last updated: June 18, 2025
In Smithers, Canada, the average temperature in December hovers around -8°C (17°F). While the mercury can plunge to a chilling -36°C (-32°F) at its lowest, it can occasionally rise to a maximum of 3°C (38°F). This month sees about 91 mm (3.6 in) of precipitation over 14 days, contributing to an average humidity level that feels downright damp at 98%.
In December in Smithers, the average temperature is -8°C (17°F), with maximums reaching 3°C (38°F) and minimums plummeting to as low as -36°C (-32°F). Be prepared for extremely cold weather and dress warmly if you plan to travel during this time.
In Smithers in December, the precipitation amount is 91 mm (3.6 in) over a span of 14 days.
In Smithers in December, humidity is 98%. With an average temperature of -8°C (17°F), this humidity feels like an unrelenting chill that seeps into your bones, making outdoor excursions feel significantly more uncomfortable and requiring layers of clothing just to keep warm.
In Smithers 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 Smithers.
UV Risk Categories
Weather in Smithers varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Smithers, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -8°C (17°F) | 102 mm (4.0 inches) | 96% | low |
| February Weather | -9°C (16°F) | 76 mm (3.0 inches) | 94% | low |
| March Weather | -3°C (27°F) | 82 mm (3.2 inches) | 93% | moderate |
| April Weather | 1°C (33°F) | 53 mm (2.1 inches) | 91% | moderate |
| May Weather | 7°C (44°F) | 65 mm (2.5 inches) | 88% | very high |
| June Weather | 10°C (51°F) | 82 mm (3.2 inches) | 84% | very high |
| July Weather | 13°C (55°F) | 83 mm (3.3 inches) | 87% | very high |
| August Weather | 12°C (54°F) | 75 mm (2.9 inches) | 88% | high |
| September Weather | 8°C (46°F) | 112 mm (4.4 inches) | 91% | high |
| October Weather | 1°C (35°F) | 125 mm (4.9 inches) | 95% | moderate |
| November Weather | -3°C (27°F) | 151 mm (5.9 inches) | 98% | low |
| December Weather | -8°C (17°F) | 91 mm (3.6 inches) | 98% | low |