January Weather in Hartford, United States

Last updated: June 24, 2025

In January, the average temperature in Hartford, United States hovers around -7°C (20°F). However, be prepared for a range, as the mercury can dip as low as -33°C (-28°F) and rise to a maximum of 11°C (52°F). Expect about 20 mm (0.8 in) of precipitation over 4 days, and don't forget that the average humidity sits at a chilly 80%. Bundle up to enjoy the wintery charm!

January Temperature in Hartford

In January in Hartford, the average temperature is -7°C (20°F). Maximum temperatures can reach 11°C (52°F), while the minimum can plummet to as low as -33°C (-28°F). Travelers should be prepared for significant temperature fluctuations and dress warmly to enjoy their visit comfortably.

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

The chart illustrates January temperature patterns in Hartford, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hartford, January typically has an average temperature of -7°C (20°F), with highs reaching up to 11°C (52°F) and lows dropping to around -33°C (-28°F).

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

January Precipitation in Hartford

In Hartford in January, the total precipitation amount is 20 mm (0.8 in) spread over a period of 4 days.

January Precipitation Trends in Hartford

The chart displays monthly precipitation patterns in Hartford, 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 Hartford, January typically receives around 20 mm (0.8 inches) of precipitation spread over approximately 4 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 Hartford

In Hartford in January, humidity is 80%. With an average temperature of -7°C (20°F), this humidity feels like an icy fog enveloping you, making outdoor travel uncomfortable as your breath freezes in the air and every step forward seems to draw out more chill than the last.

January Average Humidity in Hartford

This chart illustrates the average monthly humidity levels in Hartford, 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 Hartford is approximately 80%, 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 Hartford

In Hartford 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 Hartford, you can visit Hourly UV Index in Hartford.

Maximum UV Index Levels in Hartford for January

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

Data source: Hartford 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 Hartford Compares to Other Months

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

This table compares monthly weather conditions in Hartford, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-7°C (20°F)	20 mm (0.8 inches)	80%	low
February Weather	-7°C (20°F)	23 mm (0.9 inches)	84%	moderate
March Weather	2°C (35°F)	65 mm (2.5 inches)	75%	moderate
April Weather	7°C (45°F)	80 mm (3.2 inches)	79%	very high
May Weather	15°C (59°F)	127 mm (5.0 inches)	74%	very high
June Weather	23°C (73°F)	83 mm (3.3 inches)	81%	extreme
July Weather	24°C (76°F)	81 mm (3.2 inches)	82%	very high
August Weather	22°C (72°F)	95 mm (3.7 inches)	80%	very high
September Weather	18°C (66°F)	102 mm (4.0 inches)	75%	very high
October Weather	9°C (48°F)	77 mm (3.1 inches)	77%	moderate
November Weather	1°C (35°F)	24 mm (1.0 inches)	85%	moderate
December Weather	-3°C (26°F)	39 mm (1.5 inches)	83%	low