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April Weather in Norwalk, United States

Last updated: June 24, 2025

In April, the average temperature in Norwalk, United States hovers around 9°C (49°F). Expect a chilly minimum of -5°C (23°F), while the mercury could rise to a comfortable maximum of 26°C (79°F). Prepare for approximately 120 mm (4.7 in) of precipitation spread over 14 days, and be ready to experience an average humidity of 87%.

April Temperature in Norwalk

In April in Norwalk, the average temperature is 9°C (49°F). The maximum can reach 26°C (79°F), while the minimum can drop as low as -5°C (23°F). Be prepared for a wide range of temperatures if you're planning to travel during this time.

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 9°C (49°F), with highs reaching up to 26°C (79°F) and lows dropping to around -5°C (23°F).
JanFebMarAprMayJunJulAugSepOctNovDec293239486070757368574235
Data source: Temperature data for Norwalk generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

April Precipitation in Norwalk

In Norwalk in April, the precipitation amount is 120 mm (4.7 in) over the course of 14 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 120 mm (4.7 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec83959912012912412486811059987
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Norwalk

In Norwalk in April humidity is 87%. With an average temperature of 9°C (49°F), this humidity feels like a damp blanket wrapping around you, making travel uncomfortable and leaving you yearning for a dry breeze to refresh your spirit.

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 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%87%88%81%82%81%78%78%82%89%86%
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 is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to 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 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356810101098642
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.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)83 mm (3.3 inches)88%moderate
February Weather0°C (32°F)95 mm (3.7 inches)87%moderate
March Weather4°C (39°F)99 mm (3.9 inches)87%high
April Weather9°C (49°F)120 mm (4.7 inches)87%very high
May Weather16°C (61°F)129 mm (5.1 inches)81%very high
June Weather21°C (70°F)124 mm (4.9 inches)82%very high
July Weather24°C (75°F)124 mm (4.9 inches)81%very high
August Weather23°C (73°F)86 mm (3.4 inches)78%very high
September Weather20°C (68°F)81 mm (3.2 inches)78%very high
October Weather14°C (58°F)105 mm (4.2 inches)82%high
November Weather5°C (42°F)99 mm (3.9 inches)89%moderate
December Weather2°C (35°F)87 mm (3.4 inches)86%low

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