January Weather in Grantsville, United States

Last updated: June 24, 2025

In January, the average temperature in Grantsville, United States hovers around 2°C (35°F), with a notable range where temperatures can dip as low as -19°C (-2°F) or climb to a surprising 23°C (73°F). Expect around 98 mm (3.9 in) of precipitation spread over 11 days, contributing to an average humidity level of 88%. Prepare accordingly for the mix of chilly days and potential rain!

January Temperature in Grantsville

In January in Grantsville, the average temperature is 2°C (35°F). The maximum can reach 23°C (73°F) and the minimum can be as low as -19°C (-2°F). It's a time to prepare for a wide range of weather conditions, so pack accordingly for your travels!

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 2°C (35°F), with highs reaching up to 23°C (73°F) and lows dropping to around -19°C (-2°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 total precipitation amount is 98 mm (3.9 in) over the course of 11 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 98 mm (3.9 inches) of precipitation spread over approximately 11 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 88%. With an average temperature of 2°C (35°F), this humidity feels like you're wrapped in a cold, damp blanket, making outdoor activities uncomfortable and travel challenging due to the chill seeping into your bones.

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 88%, 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	2°C (35°F)	98 mm (3.9 inches)	88%	moderate
February Weather	4°C (40°F)	142 mm (5.6 inches)	88%	moderate
March Weather	8°C (46°F)	115 mm (4.5 inches)	88%	high
April Weather	13°C (55°F)	142 mm (5.6 inches)	86%	very high
May Weather	18°C (65°F)	160 mm (6.3 inches)	82%	very high
June Weather	22°C (72°F)	172 mm (6.8 inches)	84%	very high
July Weather	24°C (76°F)	129 mm (5.1 inches)	82%	very high
August Weather	23°C (74°F)	120 mm (4.7 inches)	73%	very high
September Weather	21°C (70°F)	106 mm (4.2 inches)	73%	very high
October Weather	15°C (60°F)	116 mm (4.6 inches)	81%	high
November Weather	7°C (45°F)	81 mm (3.2 inches)	89%	moderate
December Weather	4°C (40°F)	122 mm (4.8 inches)	86%	moderate