Last updated: June 24, 2025
In December, the average temperature in Frontenac, United States hovers around 5°C (42°F), with a minimum of -13°C (9°F) and a maximum of 24°C (75°F). Expect 38 mm (1.5 in) of precipitation over approximately 5 days, coupled with a high average humidity of 87%.
In December in Frontenac, the average temperature is 5°C (42°F), with maximums reaching up to 24°C (75°F) and minimums dropping as low as -13°C (9°F). Travelers should be prepared for a wide range of temperatures, so it's advisable to pack layers for comfort during your visit.
In Frontenac in December, the total precipitation amount is 38 mm (1.5 in) spread over a duration of 5 days.
In Frontenac in December humidity is 87%. With an average temperature of 5°C (42°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less enjoyable and travel less inviting as the air becomes heavy and oppressive.
In Frontenac in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Frontenac, you can check the information here.
UV Risk Categories
Weather in Frontenac varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Frontenac, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 2°C (36°F) | 66 mm (2.6 inches) | 81% | moderate |
February Weather | 3°C (38°F) | 62 mm (2.4 inches) | 78% | moderate |
March Weather | 10°C (50°F) | 126 mm (5.0 inches) | 76% | high |
April Weather | 14°C (57°F) | 129 mm (5.1 inches) | 78% | very high |
May Weather | 20°C (68°F) | 199 mm (7.8 inches) | 83% | very high |
June Weather | 25°C (78°F) | 100 mm (4.0 inches) | 83% | extreme |
July Weather | 27°C (81°F) | 103 mm (4.0 inches) | 78% | extreme |
August Weather | 26°C (79°F) | 121 mm (4.8 inches) | 68% | very high |
September Weather | 23°C (74°F) | 90 mm (3.5 inches) | 64% | very high |
October Weather | 15°C (60°F) | 119 mm (4.7 inches) | 70% | high |
November Weather | 8°C (47°F) | 51 mm (2.0 inches) | 83% | moderate |
December Weather | 5°C (42°F) | 38 mm (1.5 inches) | 87% | moderate |