January Weather in Grantsville, United States

Last updated: June 24, 2025

In Grantsville, United States during January, the average temperature hovers around -1°C (31°F). Expect chilly conditions, with minimums plummeting to -23°C (-10°F) and maximums reaching up to 14°C (58°F). With about 40 mm (1.6 in) of precipitation spread over 8 days, and an average humidity level of 85%, prepare for a cool and damp experience!

January Temperature in Grantsville

In January in Grantsville, the average temperature is -1°C (31°F), with maximums reaching 14°C (58°F) and minimums plummeting to as low as -23°C (-10°F). Travelers should be prepared for a wide range of temperatures and dress accordingly for the chilly weather.

January Weather in Grantsville: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Grantsville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grantsville, January typically has an average temperature of -1°C (31°F), with highs reaching up to 14°C (58°F) and lows dropping to around -23°C (-10°F).

Data source: Temperature data for Grantsville generated using information from the Copernicus Climate Change Service.

January Precipitation in Grantsville

In Grantsville in January, the precipitation amount is 40 mm (1.6 in), occurring over a span of 8 days.

January Precipitation Trends in Grantsville

The chart displays monthly precipitation patterns in Grantsville, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Grantsville, January typically receives around 40 mm (1.6 inches) of precipitation spread over approximately 8 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

January Humidity in Grantsville

In Grantsville in January, humidity is 85%. With an average temperature of -1°C (31°F), this humidity feels like an uncomfortable chill that makes any outdoor travel feel damp and biting, penetrating through layers of clothing and making each breath feel cold and heavy.

January Average Humidity in Grantsville

This chart illustrates the average monthly humidity levels in Grantsville, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Grantsville is approximately 85%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Grantsville

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.

Maximum UV Index Levels in Grantsville for January

The chart shows the monthly maximum UV Index (UVI) for Grantsville in January, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In January, the maximum UV index in Grantsville typically reaches 3, which falls under the moderate exposure category.

Data source: Grantsville January UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How January Weather in Grantsville Compares to Other Months

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.

This table compares monthly weather conditions in Grantsville, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (31°F)	40 mm (1.6 inches)	85%	moderate
February Weather	1°C (34°F)	47 mm (1.8 inches)	86%	moderate
March Weather	6°C (43°F)	61 mm (2.4 inches)	79%	high
April Weather	10°C (50°F)	56 mm (2.2 inches)	71%	very high
May Weather	15°C (60°F)	49 mm (1.9 inches)	59%	extreme
June Weather	23°C (73°F)	14 mm (0.5 inches)	55%	extreme
July Weather	27°C (81°F)	16 mm (0.6 inches)	44%	extreme
August Weather	26°C (78°F)	18 mm (0.7 inches)	34%	extreme
September Weather	20°C (68°F)	31 mm (1.2 inches)	42%	very high
October Weather	10°C (51°F)	33 mm (1.3 inches)	63%	high
November Weather	5°C (41°F)	27 mm (1.1 inches)	81%	moderate
December Weather	-1°C (31°F)	36 mm (1.4 inches)	84%	moderate