Last updated: August 27, 2025
In December, the average temperature in Grissom Air Force Base, United States hovers around 2°C (35°F). While the mercury can plunge to a chilling -22°C (-8°F), it can also reach a pleasant 17°C (63°F). During this month, expect 66 mm (2.6 in) of precipitation spread across 9 days, with the air maintaining a high average humidity of 86%.
In December in Grissom Air Force Base, the average temperature is 2°C (35°F). The maximum can reach 17°C (63°F), while the minimum can drop as low as -22°C (-8°F). Be prepared for a wide range of temperatures, making it essential to dress in layers for your travels.
In Grissom Air Force Base in December, the precipitation amount is 66 mm (2.6 in) over the course of 9 days.
In Grissom Air Force Base in December humidity is 86%. With an average temperature of 2°C (35°F), this humidity feels like a damp chill that seeps into your bones, making traveling quite uncomfortable as your clothes cling to you and the cold air cuts through any warmth you try to find.
In Grissom Air Force Base in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Grissom Air Force Base, you can visit Hourly UV Index in Grissom Air Force Base.
UV Risk Categories
Weather in Grissom Air Force Base varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Grissom Air Force Base, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -2°C (29°F) | 76 mm (3.0 inches) | 85% | moderate |
| February Weather | -1°C (31°F) | 79 mm (3.1 inches) | 85% | moderate |
| March Weather | 5°C (41°F) | 102 mm (4.0 inches) | 86% | high |
| April Weather | 10°C (51°F) | 94 mm (3.7 inches) | 87% | very high |
| May Weather | 17°C (63°F) | 154 mm (6.1 inches) | 81% | very high |
| June Weather | 23°C (73°F) | 104 mm (4.1 inches) | 82% | very high |
| July Weather | 25°C (76°F) | 101 mm (4.0 inches) | 81% | very high |
| August Weather | 23°C (74°F) | 101 mm (4.0 inches) | 79% | very high |
| September Weather | 20°C (69°F) | 64 mm (2.5 inches) | 78% | very high |
| October Weather | 14°C (57°F) | 104 mm (4.1 inches) | 81% | high |
| November Weather | 5°C (41°F) | 78 mm (3.1 inches) | 89% | moderate |
| December Weather | 2°C (35°F) | 66 mm (2.6 inches) | 86% | low |