Last updated: June 24, 2025
In December, the average temperature in Gallatin, United States hovers around 2°C (35°F), with a minimum dipping to -21°C (-6°F) and a mild maximum reaching 23°C (74°F). Expect 34 mm (1.3 in) of precipitation spread over about 4 days, contributing to a relatively high average humidity of 86%. This combination creates a unique climate experience for visitors and residents alike!
In December in Gallatin, the average temperature is 2°C (35°F). Maximum temperatures can reach 23°C (74°F), while minimums can drop as low as -21°C (-6°F). Travelers should be prepared for a wide range of temperatures and conditions during this time.
In Gallatin in December, the precipitation amount is 34 mm (1.3 in) over a span of 4 days.
In Gallatin 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 Gallatin 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 Gallatin, you can check the information here.
UV Risk Categories
Weather in Gallatin varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Gallatin, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -2°C (28°F) | 51 mm (2.0 inches) | 80% | moderate |
| February Weather | -1°C (30°F) | 40 mm (1.6 inches) | 78% | moderate |
| March Weather | 7°C (44°F) | 100 mm (3.9 inches) | 75% | high |
| April Weather | 11°C (53°F) | 85 mm (3.3 inches) | 77% | very high |
| May Weather | 18°C (65°F) | 178 mm (7.0 inches) | 82% | very high |
| June Weather | 25°C (76°F) | 143 mm (5.6 inches) | 83% | extreme |
| July Weather | 26°C (79°F) | 110 mm (4.3 inches) | 81% | extreme |
| August Weather | 24°C (76°F) | 91 mm (3.6 inches) | 78% | very high |
| September Weather | 21°C (71°F) | 109 mm (4.3 inches) | 72% | very high |
| October Weather | 13°C (55°F) | 141 mm (5.6 inches) | 72% | high |
| November Weather | 5°C (42°F) | 54 mm (2.1 inches) | 84% | moderate |
| December Weather | 2°C (35°F) | 34 mm (1.3 inches) | 86% | moderate |