January Weather in Littleton, United States

Last updated: June 24, 2025

In January, the average temperature in Littleton, United States hovers around -8°C (17°F). Expect chilly conditions with minimums plummeting to -31°C (-23°F) and occasional peaks reaching as high as 12°C (54°F). Precipitation is not uncommon, with 86 mm (3.4 in) spread across about 12 days. Additionally, be prepared for high humidity levels at 91%, making this time of year feel particularly brisk!

January Temperature in Littleton

In January in Littleton, the average temperature is -8°C (17°F), with maximums reaching up to 12°C (54°F) and minimums plummeting as low as -31°C (-23°F). Travelers should be prepared for a wide temperature range and dress accordingly to enjoy their visit.

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

The chart illustrates January temperature patterns in Littleton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Littleton, January typically has an average temperature of -8°C (17°F), with highs reaching up to 12°C (54°F) and lows dropping to around -31°C (-23°F).

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

January Precipitation in Littleton

In Littleton in January, the precipitation amount is 86 mm (3.4 in) over a span of 12 days.

January Precipitation Trends in Littleton

The chart displays monthly precipitation patterns in Littleton, 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 Littleton, January typically receives around 86 mm (3.4 inches) of precipitation spread over approximately 12 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 Littleton

In Littleton in January, humidity is 91%. With an average temperature of -8°C (17°F), this humidity feels like a chilly dampness that clings to your skin, making it uncomfortable for traveling as every step feels heavier and the cold seems to seep into your bones.

January Average Humidity in Littleton

This chart illustrates the average monthly humidity levels in Littleton, 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 Littleton is approximately 91%, 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 Littleton

In Littleton in January, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Littleton, you can visit Hourly UV Index in Littleton.

Maximum UV Index Levels in Littleton for January

The chart shows the monthly maximum UV Index (UVI) for Littleton 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 Littleton typically reaches 2, which falls under the low exposure category.

Data source: Littleton 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 Littleton Compares to Other Months

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

This table compares monthly weather conditions in Littleton, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-8°C (17°F)	86 mm (3.4 inches)	91%	low
February Weather	-7°C (20°F)	85 mm (3.4 inches)	89%	moderate
March Weather	-3°C (27°F)	77 mm (3.0 inches)	85%	high
April Weather	4°C (40°F)	125 mm (4.9 inches)	84%	very high
May Weather	12°C (53°F)	104 mm (4.1 inches)	78%	very high
June Weather	17°C (62°F)	109 mm (4.3 inches)	72%	very high
July Weather	19°C (67°F)	119 mm (4.7 inches)	75%	very high
August Weather	18°C (66°F)	91 mm (3.6 inches)	74%	very high
September Weather	15°C (58°F)	69 mm (2.7 inches)	77%	high
October Weather	8°C (47°F)	140 mm (5.5 inches)	85%	moderate
November Weather	0°C (32°F)	116 mm (4.6 inches)	86%	moderate
December Weather	-6°C (22°F)	100 mm (3.9 inches)	85%	low