Last updated: June 24, 2025
In December, the average temperature in Junction City, United States is a brisk 5°C (42°F). Expect chilly nights with a minimum dipping as low as -12°C (11°F), while sunny days can reach a comfortable 21°C (70°F). Be prepared for 144 mm (5.7 in) of precipitation spread across 11 days, and keep in mind the high average humidity of 88% that adds to the invigorating atmosphere of the season.
In December in Junction City, the average temperature is 5°C (42°F). Maximum temperatures can reach 21°C (70°F), while the minimum can drop as low as -12°C (11°F). It's advisable to pack layers for your trip, as the temperature can vary significantly throughout the day.
In Junction City in December, the precipitation amount is 144 mm (5.7 in) during 11 days, indicating a relatively wet period for the region.
In Junction City in December humidity is 88%. With an average temperature of 5°C (42°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less appealing and leading you to seek warmth indoors instead.
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 (37°F) | 100 mm (3.9 inches) | 88% | moderate |
| February Weather | 5°C (42°F) | 169 mm (6.6 inches) | 88% | high |
| March Weather | 9°C (49°F) | 143 mm (5.6 inches) | 87% | high |
| April Weather | 13°C (56°F) | 144 mm (5.7 inches) | 84% | very high |
| May Weather | 20°C (67°F) | 138 mm (5.4 inches) | 84% | very high |
| June Weather | 23°C (74°F) | 164 mm (6.4 inches) | 83% | extreme |
| July Weather | 25°C (78°F) | 112 mm (4.4 inches) | 79% | extreme |
| August Weather | 24°C (76°F) | 118 mm (4.6 inches) | 66% | very high |
| September Weather | 22°C (71°F) | 128 mm (5.0 inches) | 67% | very high |
| October Weather | 16°C (61°F) | 120 mm (4.7 inches) | 76% | high |
| November Weather | 8°C (46°F) | 87 mm (3.4 inches) | 89% | moderate |
| December Weather | 5°C (42°F) | 144 mm (5.7 inches) | 88% | moderate |