Last updated: June 24, 2025
In December, the average temperature in Junction City, United States hovers around 3°C (37°F). Conditions can vary significantly, with minimums dipping to -11°C (13°F) and maximums reaching 18°C (65°F). Expect a precipitation amount of 121 mm (4.8 in) spread over 11 days, contributing to an average humidity of 86%. Prepare accordingly for a chilly and damp month!
In December in Junction City, the average temperature is 3°C (37°F). Maximums can reach 18°C (65°F), while minimums can drop as low as -11°C (13°F). Travelers should be prepared for a wide range of temperatures, so layering clothing is essential.
In Junction City in December, the total precipitation amount is 121 mm (4.8 in), which occurs over the course of 11 days.
In Junction City in December humidity is 86%. With an average temperature of 3°C (37°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and travel less enjoyable.
In Junction City 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 Junction City, you can check the information here.
UV Risk Categories
Weather in Junction City varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Junction City, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 3°C (38°F) | 167 mm (6.6 inches) | 86% | moderate |
| February Weather | 4°C (39°F) | 157 mm (6.2 inches) | 85% | moderate |
| March Weather | 5°C (42°F) | 128 mm (5.1 inches) | 85% | high |
| April Weather | 9°C (49°F) | 80 mm (3.2 inches) | 82% | very high |
| May Weather | 13°C (56°F) | 57 mm (2.2 inches) | 81% | extreme |
| June Weather | 18°C (65°F) | 15 mm (0.6 inches) | 79% | extreme |
| July Weather | 23°C (74°F) | 2 mm (0.1 inches) | 70% | extreme |
| August Weather | 23°C (73°F) | 4 mm (0.2 inches) | 60% | very high |
| September Weather | 18°C (65°F) | 14 mm (0.5 inches) | 62% | very high |
| October Weather | 12°C (54°F) | 49 mm (1.9 inches) | 72% | high |
| November Weather | 7°C (45°F) | 99 mm (3.9 inches) | 87% | moderate |
| December Weather | 3°C (37°F) | 121 mm (4.8 inches) | 86% | moderate |