Last updated: June 24, 2025
In December, the average temperature in Harlan, United States hovers around -1°C (30°F). However, be prepared for a range of temperatures, with a minimum dipping to -23°C (-10°F) and a maximum reaching a pleasant 21°C (70°F). During this month, you can expect about 37 mm (1.5 in) of precipitation over approximately 4 days, contributing to an average humidity level of 83%. Embrace the chill and the unique beauty of this season!
In December in Harlan, the average temperature is -1°C (30°F). Maximum temperatures can reach 21°C (70°F), while minimums can plummet to as low as -23°C (-10°F). Be prepared for a wide range of temperatures if you're traveling during this time!
In Harlan in December, the precipitation amount is 37 mm (1.5 in) over the course of 4 days.
In Harlan in December humidity is 83%. With an average temperature of -1°C (30°F), this humidity feels like a biting chill that seeps through your layers, making outdoor activities uncomfortable and encouraging travelers to seek shelter indoors.
In Harlan 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 Harlan, you can check the information here.
UV Risk Categories
Weather in Harlan varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Harlan, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -5°C (23°F) | 29 mm (1.1 inches) | 76% | moderate |
| February Weather | -5°C (24°F) | 38 mm (1.5 inches) | 80% | moderate |
| March Weather | 4°C (39°F) | 82 mm (3.2 inches) | 73% | high |
| April Weather | 9°C (49°F) | 58 mm (2.3 inches) | 74% | very high |
| May Weather | 16°C (61°F) | 167 mm (6.6 inches) | 78% | very high |
| June Weather | 23°C (74°F) | 110 mm (4.3 inches) | 82% | extreme |
| July Weather | 25°C (76°F) | 70 mm (2.8 inches) | 83% | very high |
| August Weather | 23°C (73°F) | 117 mm (4.6 inches) | 80% | very high |
| September Weather | 20°C (68°F) | 97 mm (3.8 inches) | 75% | very high |
| October Weather | 11°C (51°F) | 124 mm (4.9 inches) | 75% | high |
| November Weather | 3°C (38°F) | 35 mm (1.4 inches) | 82% | moderate |
| December Weather | -1°C (30°F) | 37 mm (1.5 inches) | 83% | moderate |