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April Weather in South Boston, United States

Last updated: June 24, 2025

In April, the average temperature in South Boston, United States hovers around 16°C (61°F). However, prepare for surprises, as the temperatures can dip as low as -2°C (29°F) or soar to a warm 31°C (88°F). Expect 120 mm (4.7 in) of precipitation spread over about 11 days, and keep in mind the humidity level is quite high at 82%. Pack accordingly!

April Temperature in South Boston

In April in South Boston, the average temperature is 16°C (61°F). Maximum temperatures can reach 31°C (88°F), while minimums can drop as low as -2°C (29°F). Pack a variety of clothing to accommodate both warm days and chilly nights during your travels.

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

The chart illustrates April temperature patterns in South Boston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In South Boston, April typically has an average temperature of 16°C (61°F), with highs reaching up to 31°C (88°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec414651606976817873644945
Data source: Temperature data for South 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 South Boston

In South Boston in April, the precipitation amount is 120 mm (4.7 in) during a span of 11 days.

April Precipitation Trends in South Boston

The chart displays monthly precipitation patterns in South 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 South Boston, April typically receives around 120 mm (4.7 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec73108721201119269109981067596
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in South Boston

In South Boston in April humidity is 82%. With an average temperature of 16°C (61°F), this humidity feels like a heavy blanket enveloping you, making travel feel a bit sluggish and requiring frequent breaks to hydrate and cool down.

April Average Humidity in South Boston

This chart illustrates the average monthly humidity levels in South 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 South Boston is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%84%84%82%83%83%79%77%75%81%87%85%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in South Boston

In South 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 South Boston.

Maximum UV Index Levels in South Boston for April

The chart shows the monthly maximum UV Index (UVI) for South 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 South Boston typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3679111110109853
Data source: South 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 South Boston Compares to Other Months

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

This table compares monthly weather conditions in South Boston, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)73 mm (2.9 inches)84%moderate
February Weather8°C (46°F)108 mm (4.2 inches)84%high
March Weather11°C (51°F)72 mm (2.8 inches)84%high
April Weather16°C (61°F)120 mm (4.7 inches)82%very high
May Weather21°C (69°F)110 mm (4.3 inches)82%extreme
June Weather24°C (76°F)92 mm (3.6 inches)83%extreme
July Weather27°C (81°F)69 mm (2.7 inches)79%very high
August Weather26°C (79°F)109 mm (4.3 inches)77%very high
September Weather23°C (74°F)98 mm (3.9 inches)75%very high
October Weather18°C (64°F)106 mm (4.2 inches)81%very high
November Weather10°C (50°F)75 mm (3.0 inches)87%moderate
December Weather7°C (45°F)96 mm (3.8 inches)85%moderate

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