Last updated: June 24, 2025
In December, the average temperature in Sistersville, United States hovers around 4°C (39°F), with a notable range from a chilly -14°C (7°F) to a mild 19°C (66°F). Expect 118 mm (4.7 in) of precipitation spread across 12 days, contributing to the area's average humidity of 86%. Be prepared for a brisk and wet month ahead!
In December in Sistersville, the average temperature is 4°C (39°F), with maximums reaching 19°C (66°F) and minimums dropping as low as -14°C (7°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack both warm clothing for the chilly nights and lighter layers for the daytime warmth.
In Sistersville in December, the total precipitation amount is 118 mm (4.7 in) over the course of 12 days.
In Sistersville in December humidity is 86%. With an average temperature of 4°C (39°F), this humidity feels like a chilly mist enveloping you, making it essential to bundle up while exploring, as each breath comes with a damp chill that can be quite refreshing yet starkly invigorating for travelers.
In Sistersville 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 Sistersville, you can check the information here.
UV Risk Categories
Weather in Sistersville varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Sistersville, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 1°C (34°F) | 93 mm (3.7 inches) | 88% | moderate |
| February Weather | 3°C (38°F) | 128 mm (5.0 inches) | 88% | moderate |
| March Weather | 7°C (45°F) | 115 mm (4.5 inches) | 88% | high |
| April Weather | 12°C (54°F) | 148 mm (5.8 inches) | 86% | very high |
| May Weather | 18°C (64°F) | 141 mm (5.6 inches) | 82% | very high |
| June Weather | 22°C (71°F) | 170 mm (6.7 inches) | 84% | very high |
| July Weather | 24°C (76°F) | 126 mm (5.0 inches) | 82% | very high |
| August Weather | 23°C (74°F) | 100 mm (3.9 inches) | 73% | very high |
| September Weather | 21°C (69°F) | 105 mm (4.1 inches) | 73% | very high |
| October Weather | 15°C (59°F) | 114 mm (4.5 inches) | 81% | high |
| November Weather | 7°C (44°F) | 86 mm (3.4 inches) | 89% | moderate |
| December Weather | 4°C (39°F) | 118 mm (4.7 inches) | 86% | moderate |