April Weather in Norwalk, United States

Last updated: June 24, 2025

In April, the average temperature in Norwalk, United States is 17°C (63°F). Expect a range from a brisk 8°C (47°F) at night to a warm 36°C (97°F) during the day. During this month, precipitation averages around 23 mm (0.9 in) over the course of 3 days, with an average humidity of 70%.

April Temperature in Norwalk

In April in Norwalk, the average temperature is 17°C (63°F). Maximum temperatures can reach up to 36°C (97°F), while minimum temperatures can drop as low as 8°C (47°F). This variation makes it advisable for travelers to pack a mix of light clothing for warmer days and layers for cooler evenings.

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

The chart illustrates April 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, April typically has an average temperature of 17°C (63°F), with highs reaching up to 36°C (97°F) and lows dropping to around 8°C (47°F).

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

April Precipitation in Norwalk

In Norwalk in April, the precipitation amount is 23 mm (0.9 in) over the course of 3 days.

April Precipitation Trends in Norwalk

The chart displays monthly precipitation patterns in Norwalk, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Norwalk, April typically receives around 23 mm (0.9 inches) of precipitation spread over approximately 3 days.

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

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Millimeters (mm) Inches (in)

April Humidity in Norwalk

In Norwalk in April humidity is 70%. With an average temperature of 17°C (63°F), this humidity feels like a warm embrace, making travel both refreshing and slightly sticky, as you navigate the air thick with moisture.

April Average Humidity in Norwalk

This chart illustrates the average monthly humidity levels in Norwalk, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Norwalk is approximately 70%, offering insight into how humid the weather typically is during this month.

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

April UV Index in Norwalk

In Norwalk in April, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Norwalk.

Maximum UV Index Levels in Norwalk for April

The chart shows the monthly maximum UV Index (UVI) for Norwalk in April, 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 April, the maximum UV index in Norwalk typically reaches 10, which falls under the very high exposure category.

Data source: Norwalk April 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 April 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 April’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 April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	13°C (56°F)	75 mm (3.0 inches)	74%	moderate
February Weather	13°C (56°F)	63 mm (2.5 inches)	79%	high
March Weather	14°C (58°F)	67 mm (2.7 inches)	75%	very high
April Weather	17°C (63°F)	23 mm (0.9 inches)	70%	very high
May Weather	18°C (65°F)	16 mm (0.6 inches)	70%	very high
June Weather	21°C (70°F)	3 mm (0.1 inches)	72%	extreme
July Weather	24°C (76°F)	2 mm (0.1 inches)	73%	extreme
August Weather	25°C (76°F)	2 mm (0.1 inches)	69%	very high
September Weather	23°C (74°F)	4 mm (0.1 inches)	68%	very high
October Weather	20°C (69°F)	10 mm (0.4 inches)	67%	high
November Weather	17°C (62°F)	20 mm (0.8 inches)	68%	moderate
December Weather	13°C (56°F)	72 mm (2.8 inches)	71%	moderate