Last updated: June 24, 2025
In January, the average temperature in Grantsville, United States hovers around -2°C (29°F), with extremes ranging from a chilly -27°C (-16°F) to a surprisingly warm 19°C (66°F). Expect 88 mm (3.5 in) of precipitation spread across 14 days, contributing to an average humidity of a snug 86%.
In January in Grantsville, the average temperature is -2°C (29°F). The maximum can reach 19°C (66°F), while the minimum can plummet to as low as -27°C (-16°F). Be prepared for a wide range of temperatures and pack accordingly for your travels!
In Grantsville in January, the precipitation amount is 88 mm (3.5 in) over the course of 14 days.
In Grantsville in January humidity is 86%. With an average temperature of -2°C (29°F), this humidity feels like a damp chill that seeps through layers of clothing, making outdoor activities uncomfortable and travel plans challenging.
In Grantsville in January, 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 Grantsville, you can check the information here.
UV Risk Categories
Weather in Grantsville varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Grantsville, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | -2°C (29°F) | 88 mm (3.5 inches) | 86% | moderate |
February Weather | 1°C (33°F) | 132 mm (5.2 inches) | 86% | moderate |
March Weather | 4°C (39°F) | 115 mm (4.5 inches) | 86% | high |
April Weather | 9°C (49°F) | 137 mm (5.4 inches) | 84% | very high |
May Weather | 15°C (59°F) | 155 mm (6.1 inches) | 78% | very high |
June Weather | 19°C (67°F) | 150 mm (5.9 inches) | 79% | very high |
July Weather | 22°C (71°F) | 105 mm (4.1 inches) | 70% | very high |
August Weather | 21°C (70°F) | 99 mm (3.9 inches) | 59% | very high |
September Weather | 18°C (64°F) | 119 mm (4.7 inches) | 68% | very high |
October Weather | 12°C (54°F) | 115 mm (4.5 inches) | 80% | high |
November Weather | 4°C (40°F) | 85 mm (3.3 inches) | 86% | moderate |
December Weather | 1°C (34°F) | 121 mm (4.8 inches) | 85% | moderate |