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April Weather in Boston, United States

Last updated: June 24, 2025

In Boston, United States, the average temperature in April hovers around 13°C (55°F), offering a pleasant climate. Expect lows of 3°C (37°F) and highs reaching 21°C (70°F). Throughout the month, anticipate about 86 mm (3.4 in) of precipitation over 10 days, contributing to an average humidity of 81%. Perfect for enjoying the lush surroundings and mild temperatures!

April Temperature in Boston

In April in Boston, the average temperature is 13°C (55°F). Maximum temperatures can reach 21°C (70°F), while minimums can drop as low as 3°C (37°F). It's a great time to explore Boston, so be sure to pack layers for your travels!

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

The chart illustrates April temperature patterns in Boston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Boston, April typically has an average temperature of 13°C (55°F), with highs reaching up to 21°C (70°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec414346556373797874675447
Data source: Temperature data for Boston 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 Boston

In Boston in April, the precipitation amount is 86 mm (3.4 in) over the course of 10 days.

April Precipitation Trends in Boston

The chart displays monthly precipitation patterns in Boston, 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 Boston, April typically receives around 86 mm (3.4 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec941198786897310710410510891102
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Boston

In Boston in April, humidity is 81%. With an average temperature of 13°C (55°F), this humidity feels like a damp blanket wrapping around you, making strolls outdoors feel heavy and slightly oppressive, which may be less than ideal for travelers looking to explore comfortably.

April Average Humidity in Boston

This chart illustrates the average monthly humidity levels in Boston, 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 Boston is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%82%81%80%82%81%81%78%80%84%84%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Boston

In Boston 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 Boston.

Maximum UV Index Levels in Boston for April

The chart shows the monthly maximum UV Index (UVI) for Boston 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 Boston typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101011108753
Data source: Boston 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 Boston Compares to Other Months

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

This table compares monthly weather conditions in Boston, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)94 mm (3.7 inches)84%moderate
February Weather6°C (43°F)119 mm (4.7 inches)83%moderate
March Weather8°C (47°F)87 mm (3.4 inches)82%high
April Weather13°C (55°F)86 mm (3.4 inches)81%very high
May Weather17°C (64°F)89 mm (3.5 inches)80%very high
June Weather23°C (73°F)73 mm (2.9 inches)82%very high
July Weather26°C (79°F)107 mm (4.2 inches)81%extreme
August Weather26°C (78°F)104 mm (4.1 inches)81%very high
September Weather23°C (75°F)105 mm (4.1 inches)78%very high
October Weather19°C (67°F)108 mm (4.2 inches)80%high
November Weather12°C (54°F)91 mm (3.6 inches)84%moderate
December Weather8°C (47°F)102 mm (4.0 inches)84%moderate

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