January Weather in Granby, United States

Last updated: June 24, 2025

In January, the average temperature in Granby, United States hovers around 2°C (36°F), with the minimum dipping to a chilly -18°C (0°F) and the maximum peaking at a mild 21°C (70°F). Expect about 84 mm (3.3 in) of precipitation spread over 7 days, and enjoy an average humidity of 81% that keeps the air refreshingly crisp.

January Temperature in Granby

In January in Granby, the average temperature is 2°C (36°F). Maximum temperatures can reach 21°C (70°F), while minimums can dip as low as -18°C (0°F). Be prepared for a wide range of weather, ensuring you dress in layers to stay comfortable while exploring Granby.

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

The chart illustrates January temperature patterns in Granby, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Granby, January typically has an average temperature of 2°C (36°F), with highs reaching up to 21°C (70°F) and lows dropping to around -18°C (0°F).

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

January Precipitation in Granby

In Granby in January, the total precipitation amount is 84 mm (3.3 in) distributed over a span of 7 days.

January Precipitation Trends in Granby

The chart displays monthly precipitation patterns in Granby, 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 Granby, January typically receives around 84 mm (3.3 inches) of precipitation spread over approximately 7 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 Granby

In Granby in January humidity is 81%. With an average temperature of 2°C (36°F), this humidity feels like a chilly dampness that seeps into your bones, making travel uncomfortable and necessitating extra layers to stay warm and dry.

January Average Humidity in Granby

This chart illustrates the average monthly humidity levels in Granby, 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 Granby is approximately 81%, 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 Granby

In Granby 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 Granby, you can check the information here.

Maximum UV Index Levels in Granby for January

The chart shows the monthly maximum UV Index (UVI) for Granby 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 Granby typically reaches 3, which falls under the moderate exposure category.

Data source: Granby 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 Granby Compares to Other Months

Weather in Granby varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Granby, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Granby, 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 (36°F)	84 mm (3.3 inches)	81%	moderate
February Weather	4°C (39°F)	75 mm (2.9 inches)	78%	high
March Weather	10°C (50°F)	145 mm (5.7 inches)	76%	high
April Weather	13°C (56°F)	139 mm (5.5 inches)	78%	very high
May Weather	19°C (67°F)	174 mm (6.9 inches)	83%	very high
June Weather	25°C (77°F)	85 mm (3.3 inches)	83%	extreme
July Weather	26°C (80°F)	89 mm (3.5 inches)	78%	extreme
August Weather	25°C (77°F)	111 mm (4.4 inches)	68%	very high
September Weather	23°C (74°F)	63 mm (2.5 inches)	64%	very high
October Weather	15°C (59°F)	146 mm (5.8 inches)	70%	high
November Weather	8°C (47°F)	60 mm (2.3 inches)	83%	moderate
December Weather	6°C (42°F)	49 mm (1.9 inches)	87%	moderate