Last updated: June 24, 2025
In December, the average temperature in Fortville, United States hovers around 2°C (36°F). Expect a chill in the air, with minimums dropping to -20°C (-3°F), while highs can reach up to 18°C (64°F). Be prepared for some damp days, as precipitation averages 77 mm (3.0 in) over 11 days, and the average humidity sits at a noteworthy 87%.
In December in Fortville, the average temperature is 2°C (36°F). The maximum can reach 18°C (64°F) and the minimum can be as low as -20°C (-3°F). Be prepared for a wide range of temperatures during your travels, and dress accordingly!
In Fortville in December, the precipitation amount is 77 mm (3.0 in) over the course of 11 days.
In Fortville in December, humidity is 87%. With an average temperature of 2°C (36°F), this humidity feels like an unwelcome chill that seeps into your bones, making outdoor exploration feel damp and heavy, and encouraging travelers to seek the warmth of indoor attractions instead.
In Fortville 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 Fortville, you can check the information here.
UV Risk Categories
Weather in Fortville varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Fortville, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -1°C (30°F) | 81 mm (3.2 inches) | 87% | moderate |
| February Weather | 1°C (33°F) | 95 mm (3.7 inches) | 85% | moderate |
| March Weather | 6°C (42°F) | 124 mm (4.9 inches) | 86% | high |
| April Weather | 11°C (52°F) | 96 mm (3.8 inches) | 84% | very high |
| May Weather | 18°C (64°F) | 136 mm (5.4 inches) | 79% | very high |
| June Weather | 23°C (73°F) | 103 mm (4.1 inches) | 82% | extreme |
| July Weather | 25°C (76°F) | 112 mm (4.4 inches) | 79% | very high |
| August Weather | 23°C (74°F) | 87 mm (3.4 inches) | 70% | very high |
| September Weather | 21°C (70°F) | 79 mm (3.1 inches) | 69% | very high |
| October Weather | 14°C (58°F) | 102 mm (4.0 inches) | 76% | high |
| November Weather | 5°C (42°F) | 90 mm (3.5 inches) | 88% | moderate |
| December Weather | 2°C (36°F) | 77 mm (3.0 inches) | 87% | moderate |