January Weather in Granby, United States

Last updated: June 24, 2025

In January, the average temperature in Granby, United States hovers around -9°C (16°F). Expect chilly extremes, with minimums plunging to -28°C (-19°F) and maximums reaching up to 7°C (44°F). Additionally, prepare for 38 mm (1.5 in) of precipitation spread over 10 days, while the air maintains a high humidity level of 88%. Stay warm and dry!

January Temperature in Granby

In January in Granby, the average temperature is -9°C (16°F), with a maximum reaching 7°C (44°F) and a minimum dropping as low as -28°C (-19°F). Travelers should be prepared for extremely cold conditions and dress appropriately for winter activities.

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 -9°C (16°F), with highs reaching up to 7°C (44°F) and lows dropping to around -28°C (-19°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 precipitation amount is 38 mm (1.5 in) over the course of 10 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 38 mm (1.5 inches) of precipitation spread over approximately 10 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Granby

In Granby in January humidity is 88%. With an average temperature of -9°C (16°F), this humidity feels like a biting cold that seeps into your bones, making travel outside feel much more daunting and uncomfortable, as each breath turns into a cloud of mist in the frigid air.

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 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 Granby

In Granby in January, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Granby for better planning.

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 4, 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	-9°C (16°F)	38 mm (1.5 inches)	88%	moderate
February Weather	-8°C (19°F)	54 mm (2.1 inches)	87%	high
March Weather	-3°C (27°F)	58 mm (2.3 inches)	81%	very high
April Weather	0°C (32°F)	62 mm (2.4 inches)	76%	extreme
May Weather	4°C (39°F)	64 mm (2.5 inches)	66%	extreme
June Weather	11°C (52°F)	33 mm (1.3 inches)	58%	extreme
July Weather	15°C (59°F)	25 mm (1.0 inches)	52%	extreme
August Weather	14°C (58°F)	27 mm (1.1 inches)	56%	extreme
September Weather	11°C (51°F)	26 mm (1.0 inches)	65%	very high
October Weather	2°C (36°F)	50 mm (2.0 inches)	76%	high
November Weather	-4°C (24°F)	40 mm (1.6 inches)	82%	moderate
December Weather	-9°C (15°F)	41 mm (1.6 inches)	89%	moderate