March Weather in Norwalk, United States

Last updated: June 24, 2025

In Norwalk, United States, the average temperature in March hovers around 4°C (40°F), with minimums dipping as low as -20°C (-5°F) and maximums soaring to 23°C (74°F). Expect 83 mm (3.3 in) of precipitation spread over about 8 days, contributing to an average humidity level of 77%.

March Temperature in Norwalk

In March in Norwalk, the average temperature is 4°C (40°F). Maximums can reach 23°C (74°F), while minimums can dip to as low as -20°C (-5°F). Travelers should be prepared for a wide range of temperatures and pack accordingly to enjoy their visit.

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

The chart illustrates March temperature patterns in Norwalk, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Norwalk, March typically has an average temperature of 4°C (40°F), with highs reaching up to 23°C (74°F) and lows dropping to around -20°C (-5°F).

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

March Precipitation in Norwalk

In Norwalk in March, the precipitation amount reaches 83 mm (3.3 in) over the course of 8 days.

March Precipitation Trends in Norwalk

The chart displays monthly precipitation patterns in Norwalk, 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 Norwalk, March typically receives around 83 mm (3.3 inches) of precipitation spread over approximately 8 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 Norwalk

In Norwalk in March humidity is 77%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that penetrates your clothing, making outdoor exploration less enjoyable and prompting travelers to seek shelter or warm indoor activities instead.

March Average Humidity in Norwalk

This chart illustrates the average monthly humidity levels in Norwalk, 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 Norwalk is approximately 77%, 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 Norwalk

In Norwalk 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 Norwalk, you can refer to this Hourly UV Index in Norwalk.

Maximum UV Index Levels in Norwalk for March

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

Data source: Norwalk 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 Norwalk Compares to Other Months

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

This table compares monthly weather conditions in Norwalk, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (23°F)	38 mm (1.5 inches)	78%	moderate
February Weather	-4°C (24°F)	40 mm (1.6 inches)	80%	moderate
March Weather	4°C (40°F)	83 mm (3.3 inches)	77%	high
April Weather	10°C (50°F)	72 mm (2.9 inches)	77%	very high
May Weather	17°C (63°F)	171 mm (6.7 inches)	77%	very high
June Weather	24°C (75°F)	122 mm (4.8 inches)	81%	extreme
July Weather	25°C (78°F)	67 mm (2.6 inches)	81%	very high
August Weather	24°C (75°F)	82 mm (3.2 inches)	77%	very high
September Weather	20°C (69°F)	112 mm (4.4 inches)	73%	very high
October Weather	11°C (53°F)	126 mm (4.9 inches)	75%	high
November Weather	4°C (39°F)	39 mm (1.5 inches)	85%	moderate
December Weather	0°C (31°F)	37 mm (1.5 inches)	83%	moderate