Last updated: June 24, 2025
In December, the average temperature in Blanchester, United States hovers around 3°C (38°F). Expect a chilly minimum of -17°C (2°F), while the temperature can peak at a pleasant 19°C (66°F). Be prepared for some rain, with an average precipitation of 118 mm (4.6 in) spread across 11 days, and keep in mind the high average humidity of 87% that adds to the overall chill.
In December in Blanchester, the average temperature is 3°C (38°F), with maximums reaching up to 19°C (66°F) and minimums plummeting as low as -17°C (2°F). Travelers should be prepared for a wide range of temperatures, from chilly days to warmer afternoons.
In Blanchester in December, the precipitation amount is 118 mm (4.6 in) over the course of 11 days.
In Blanchester in December humidity is 87%. With an average temperature of 3°C (38°F), this humidity feels like a chilly blanket wrapped around you, making travel quite uncomfortable as the cold dampness seeps into your clothes and lingers in the air, often leaving you shivering and longing for warmer, drier conditions.
In Blanchester 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 Blanchester, you can check the information here.
UV Risk Categories
Weather in Blanchester varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Blanchester, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 0°C (33°F) | 84 mm (3.3 inches) | 88% | moderate |
| February Weather | 2°C (37°F) | 112 mm (4.4 inches) | 88% | moderate |
| March Weather | 7°C (45°F) | 142 mm (5.6 inches) | 87% | high |
| April Weather | 12°C (54°F) | 128 mm (5.0 inches) | 85% | very high |
| May Weather | 18°C (65°F) | 131 mm (5.2 inches) | 81% | very high |
| June Weather | 23°C (73°F) | 131 mm (5.2 inches) | 82% | very high |
| July Weather | 25°C (77°F) | 118 mm (4.6 inches) | 81% | very high |
| August Weather | 23°C (74°F) | 82 mm (3.2 inches) | 73% | very high |
| September Weather | 21°C (70°F) | 87 mm (3.4 inches) | 73% | very high |
| October Weather | 15°C (59°F) | 97 mm (3.8 inches) | 78% | high |
| November Weather | 6°C (43°F) | 102 mm (4.0 inches) | 89% | moderate |
| December Weather | 3°C (38°F) | 118 mm (4.6 inches) | 87% | moderate |