March Weather in Darien, United States

Last updated: June 24, 2025

In March, the average temperature in Darien, United States hovers around 4°C (40°F), with extremes ranging from a brisk -19°C (-2°F) to a warm 26°C (79°F). Expect precipitation of about 89 mm (3.5 in) over 11 days, and be prepared for a humidity level averaging around 84%.

March Temperature in Darien

In March in Darien, the average temperature is 4°C (40°F). Maximums can reach 26°C (79°F), and minimums can be as low as -19°C (-2°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

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

The chart illustrates March 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, March typically has an average temperature of 4°C (40°F), with highs reaching up to 26°C (79°F) and lows dropping to around -19°C (-2°F).

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

March Precipitation in Darien

In Darien in March, the precipitation amount is 89 mm (3.5 in) over a span of 11 days.

March Precipitation Trends in Darien

The chart displays monthly precipitation patterns in Darien, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In Darien, March typically receives around 89 mm (3.5 inches) of precipitation spread over approximately 11 days.

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

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Millimeters (mm) Inches (in)

March Humidity in Darien

In Darien in March, humidity is 84%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and requiring extra layers to stay warm and dry while traveling.

March Average Humidity in Darien

This chart illustrates the average monthly humidity levels in Darien, with March’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In March, average humidity in Darien is approximately 84%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in Darien

In Darien in March, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Darien, you can refer to this Hourly UV Index in Darien.

Maximum UV Index Levels in Darien for March

The chart shows the monthly maximum UV Index (UVI) for Darien in March, 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 March, the maximum UV index in Darien typically reaches 6, which falls under the high exposure category.

Data source: Darien March 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 March 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 March’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 March’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