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April Weather in New Haven, United States

Last updated: June 24, 2025

In April, the average temperature in New Haven, United States is a mild 12°C (54°F). However, temperatures can vary significantly, with a minimum of -3°C (26°F) and a maximum reaching up to 30°C (85°F). Expect a fair amount of precipitation, averaging 116 mm (4.5 in) over about 11 days, accompanied by a high average humidity of 85%.

April Temperature in New Haven

In April in New Haven, the average temperature is 12°C (54°F). Maximums can reach 30°C (85°F), and minimums can drop as low as -3°C (26°F). Be sure to pack layers to accommodate the wide range of temperatures while exploring New Haven.

April Weather in New Haven: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in New Haven, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In New Haven, April typically has an average temperature of 12°C (54°F), with highs reaching up to 30°C (85°F) and lows dropping to around -3°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec333745546673777570594338
Data source: Temperature data for New Haven 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 New Haven

In New Haven in April, the precipitation amount is 116 mm (4.5 in) accumulated over the course of 11 days.

April Precipitation Trends in New Haven

The chart displays monthly precipitation patterns in New Haven, 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 New Haven, April typically receives around 116 mm (4.5 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec7910413311612513011396799696104
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in New Haven

In New Haven in April, humidity is 85%. With an average temperature of 12°C (54°F), this humidity feels like a heavy blanket wrapping around you, making traveling not only uncomfortable but also exhausting as the damp air clings to your skin and slows your movements.

April Average Humidity in New Haven

This chart illustrates the average monthly humidity levels in New Haven, 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 New Haven is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%87%85%81%82%81%73%73%78%89%87%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in New Haven

In New Haven in April, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in New Haven.

Maximum UV Index Levels in New Haven for April

The chart shows the monthly maximum UV Index (UVI) for New Haven 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 New Haven typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098643
Data source: New Haven 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 New Haven Compares to Other Months

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

This table compares monthly weather conditions in New Haven, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)79 mm (3.1 inches)88%moderate
February Weather3°C (37°F)104 mm (4.1 inches)88%moderate
March Weather7°C (45°F)133 mm (5.2 inches)87%high
April Weather12°C (54°F)116 mm (4.5 inches)85%very high
May Weather19°C (66°F)125 mm (4.9 inches)81%very high
June Weather23°C (74°F)130 mm (5.1 inches)82%very high
July Weather25°C (78°F)113 mm (4.4 inches)81%very high
August Weather24°C (75°F)96 mm (3.8 inches)73%very high
September Weather21°C (71°F)79 mm (3.1 inches)73%very high
October Weather15°C (59°F)96 mm (3.8 inches)78%high
November Weather6°C (44°F)96 mm (3.8 inches)89%moderate
December Weather4°C (39°F)104 mm (4.1 inches)87%moderate

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