January Weather in Darien, United States

Last updated: June 24, 2025

In January, the average temperature in Darien, United States hovers around -3°C (26°F), with extremes ranging from a chilly -31°C (-23°F) to a surprisingly warm 15°C (60°F). Expect 61 mm (2.4 in) of precipitation spread across about 8 days, contributing to an average humidity level of 82%. Dress warmly and prepare for a mix of conditions!

January Temperature in Darien

In January in Darien, the average temperature is -3°C (26°F), with a maximum that can reach 15°C (60°F) and a minimum that can dip as low as -31°C (-23°F). Travelers should be prepared for significant temperature fluctuations and dress accordingly for both cold and mild conditions.

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

The chart illustrates January temperature patterns in Darien, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Darien, January typically has an average temperature of -3°C (26°F), with highs reaching up to 15°C (60°F) and lows dropping to around -31°C (-23°F).

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

January Precipitation in Darien

In Darien in January, the precipitation amount is 61 mm (2.4 in) distributed over 8 days.

January Precipitation Trends in Darien

The chart displays monthly precipitation patterns in Darien, 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 Darien, January typically receives around 61 mm (2.4 inches) of precipitation spread over approximately 8 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 Darien

In Darien in January, humidity is 82%. With an average temperature of -3°C (26°F), this humidity feels like an uncomfortable chill that makes traveling outside feel more biting and penetrating, as the cold damp air clings to your skin, intensifying the cold sensation and making even short excursions feel more daunting.

January Average Humidity in Darien

This chart illustrates the average monthly humidity levels in Darien, 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 Darien is approximately 82%, 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 Darien

In Darien 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 Darien, you can check the information here.

Maximum UV Index Levels in Darien for January

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

Data source: Darien 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 Darien Compares to Other Months

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

This table compares monthly weather conditions in Darien, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (26°F)	61 mm (2.4 inches)	82%	moderate
February Weather	-2°C (28°F)	63 mm (2.5 inches)	83%	moderate
March Weather	4°C (40°F)	89 mm (3.5 inches)	84%	high
April Weather	9°C (49°F)	120 mm (4.7 inches)	85%	very high
May Weather	16°C (61°F)	156 mm (6.1 inches)	79%	very high
June Weather	22°C (72°F)	151 mm (6.0 inches)	82%	very high
July Weather	24°C (76°F)	116 mm (4.6 inches)	80%	very high
August Weather	23°C (73°F)	91 mm (3.6 inches)	81%	very high
September Weather	20°C (68°F)	85 mm (3.4 inches)	80%	very high
October Weather	12°C (55°F)	131 mm (5.2 inches)	82%	high
November Weather	4°C (39°F)	57 mm (2.3 inches)	88%	moderate
December Weather	1°C (33°F)	54 mm (2.1 inches)	84%	low