Last updated: June 18, 2025
In December, the average temperature in Pasadena, Canada hovers around -2°C (29°F). Visitors should be prepared for chilly conditions, as temperatures can dip to a minimum of -13°C (9°F) or rise to a pleasant 12°C (54°F). With an average precipitation of 139 mm (5.5 in) over 21 days and humidity levels reaching 85%, it’s wise to pack accordingly for this brisk and moist time of year.
In December in Pasadena, the average temperature is -2°C (29°F), with maximums reaching up to 12°C (54°F) and minimums dropping as low as -13°C (9°F). Be prepared for cold weather and dress in layers if you plan to travel during this time.
In Pasadena in December, the total precipitation amount is 139 mm (5.5 in) spread over the course of 21 days.
In Pasadena in December, humidity is 85%. With an average temperature of -2°C (29°F), this humidity feels like a chilling, damp blanket that clings to your skin, making travel uncomfortable and often prompting an urgent search for warmth and shelter.
In Pasadena 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 Pasadena.
UV Risk Categories
Weather in Pasadena varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Pasadena, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -6°C (22°F) | 90 mm (3.5 inches) | 88% | low |
| February Weather | -7°C (20°F) | 111 mm (4.4 inches) | 90% | moderate |
| March Weather | -4°C (25°F) | 104 mm (4.1 inches) | 89% | moderate |
| April Weather | 1°C (34°F) | 100 mm (4.0 inches) | 88% | high |
| May Weather | 6°C (43°F) | 94 mm (3.7 inches) | 87% | very high |
| June Weather | 11°C (52°F) | 94 mm (3.7 inches) | 85% | very high |
| July Weather | 15°C (60°F) | 70 mm (2.8 inches) | 90% | very high |
| August Weather | 17°C (63°F) | 89 mm (3.5 inches) | 90% | very high |
| September Weather | 13°C (55°F) | 106 mm (4.2 inches) | 87% | high |
| October Weather | 7°C (46°F) | 114 mm (4.5 inches) | 84% | moderate |
| November Weather | 3°C (37°F) | 140 mm (5.5 inches) | 83% | low |
| December Weather | -2°C (29°F) | 139 mm (5.5 inches) | 85% | low |