Last updated: June 18, 2025
In December, the average temperature in Welland, Canada hovers around 1°C (35°F). Expect chilly days, as temperatures can plummet to a minimum of -16°C (4°F), while the highest may reach up to 15°C (59°F). Be prepared for some wet weather, with an average precipitation of 93 mm (3.7 in) spread over about 14 days. The air will feel quite humid, with an average humidity level of 87%, making it essential to dress warmly and stay dry!
In December in Welland, the average temperature is 1°C (35°F). The maximum can reach 15°C (59°F), while the minimum can dip as low as -16°C (4°F). Be prepared for a wide range of temperatures if you're traveling during this time.
In Welland, in December, the precipitation amount is 93 mm (3.7 in) over the course of 14 days.
In Welland in December humidity is 87%. With an average temperature of 1°C (35°F), this humidity feels like a chilling dampness that seeps into your bones, making travel feel particularly uncomfortable as the cold air clings to your skin and makes each step feel heavier.
In Welland 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 Welland, you can visit Hourly UV Index in Welland.
UV Risk Categories
Weather in Welland varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Welland, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -2°C (29°F) | 79 mm (3.1 inches) | 91% | low |
| February Weather | -2°C (29°F) | 85 mm (3.4 inches) | 91% | moderate |
| March Weather | 1°C (34°F) | 77 mm (3.0 inches) | 88% | moderate |
| April Weather | 6°C (43°F) | 118 mm (4.6 inches) | 88% | very high |
| May Weather | 12°C (54°F) | 104 mm (4.1 inches) | 82% | very high |
| June Weather | 18°C (65°F) | 84 mm (3.3 inches) | 79% | very high |
| July Weather | 22°C (73°F) | 124 mm (4.9 inches) | 77% | very high |
| August Weather | 22°C (72°F) | 85 mm (3.4 inches) | 72% | very high |
| September Weather | 19°C (66°F) | 80 mm (3.2 inches) | 76% | high |
| October Weather | 13°C (56°F) | 133 mm (5.2 inches) | 83% | moderate |
| November Weather | 6°C (42°F) | 92 mm (3.6 inches) | 88% | moderate |
| December Weather | 1°C (35°F) | 93 mm (3.7 inches) | 87% | low |