Last updated: June 24, 2025
In December, the average temperature in Vandalia, United States is a brisk 3°C (38°F). Expect a chill, as temperatures can dip as low as -18°C (0°F) or rise to a comfortable 23°C (74°F). During this month, precipitation levels reach about 45 mm (1.8 in) over 5 days, accompanied by a notable average humidity of 86%. Prepare accordingly for a mix of cold and damp conditions!
In December in Vandalia, the average temperature is 3°C (38°F). Maximums can reach 23°C (74°F), while minimums can drop as low as -18°C (0°F). Be sure to pack layers and prepare for a mix of chilly and warm conditions during your travels.
In Vandalia in December, the total precipitation amount is 45 mm (1.8 in) over a span of 5 days.
In Vandalia in December humidity is 86%. With an average temperature of 3°C (38°F), this humidity feels like a damp chill that seeps through your layers, making traveling uncomfortable as breath clouds visibly in the crisp air.
In Vandalia 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 Vandalia, you can check the information here.
UV Risk Categories
Weather in Vandalia varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Vandalia, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | -1°C (31°F) | 66 mm (2.6 inches) | 82% | moderate |
February Weather | 1°C (34°F) | 62 mm (2.4 inches) | 80% | moderate |
March Weather | 8°C (46°F) | 125 mm (4.9 inches) | 80% | high |
April Weather | 12°C (54°F) | 116 mm (4.5 inches) | 80% | very high |
May Weather | 19°C (67°F) | 165 mm (6.5 inches) | 82% | very high |
June Weather | 25°C (76°F) | 109 mm (4.3 inches) | 83% | extreme |
July Weather | 26°C (79°F) | 95 mm (3.7 inches) | 81% | extreme |
August Weather | 24°C (76°F) | 124 mm (4.9 inches) | 80% | very high |
September Weather | 22°C (72°F) | 62 mm (2.5 inches) | 76% | very high |
October Weather | 14°C (58°F) | 100 mm (3.9 inches) | 76% | high |
November Weather | 6°C (44°F) | 60 mm (2.4 inches) | 85% | moderate |
December Weather | 3°C (38°F) | 45 mm (1.8 inches) | 86% | moderate |