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March Weather in New Haven, United States

Last updated: June 24, 2025

In March, the average temperature in New Haven, United States hovers around 8°C (47°F). However, be prepared for a temperature range from a chilling -16°C (3°F) to a warm 29°C (84°F). During this month, expect 128 mm (5.1 in) of precipitation spread over 12 days, accompanied by an average humidity level of 80%.

March Temperature in New Haven

In March in New Haven, the average temperature is 8°C (47°F). Maximums can reach 29°C (84°F), and minimums can be as low as -16°C (3°F). Be prepared for a wide range of temperatures when traveling to New Haven during this month.

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

The chart illustrates March 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, March typically has an average temperature of 8°C (47°F), with highs reaching up to 29°C (84°F) and lows dropping to around -16°C (3°F).
JanFebMarAprMayJunJulAugSepOctNovDec333647556676797672584539
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.

March Precipitation in New Haven

In New Haven in March, the precipitation amount is 128 mm (5.1 in) over the course of 12 days.

March Precipitation Trends in New Haven

The chart displays monthly precipitation patterns in New Haven, 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 New Haven, March typically receives around 128 mm (5.1 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec747912812816187102141521046751
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in New Haven

In New Haven in March, humidity is 80%. With an average temperature of 8°C (47°F), this humidity feels like you're walking through a heavy mist, making your clothes cling to your skin and every step prone to a shiver, which can be quite uncomfortable for traveling.

March Average Humidity in New Haven

This chart illustrates the average monthly humidity levels in New Haven, 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 New Haven is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%80%80%82%83%81%80%76%76%85%86%
Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in New Haven

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

Maximum UV Index Levels in New Haven for March

The chart shows the monthly maximum UV Index (UVI) for New Haven 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 New Haven typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111109753
Data source: New Haven 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 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 March’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 March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)74 mm (2.9 inches)82%moderate
February Weather2°C (36°F)79 mm (3.1 inches)80%moderate
March Weather8°C (47°F)128 mm (5.1 inches)80%high
April Weather13°C (55°F)128 mm (5.0 inches)80%very high
May Weather19°C (66°F)161 mm (6.3 inches)82%very high
June Weather24°C (76°F)87 mm (3.4 inches)83%extreme
July Weather26°C (79°F)102 mm (4.0 inches)81%extreme
August Weather24°C (76°F)141 mm (5.5 inches)80%very high
September Weather22°C (72°F)52 mm (2.0 inches)76%very high
October Weather15°C (59°F)104 mm (4.1 inches)76%high
November Weather7°C (45°F)67 mm (2.6 inches)85%moderate
December Weather4°C (39°F)51 mm (2.0 inches)86%moderate

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