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April Weather in Hyannis, United States

Last updated: June 24, 2025

In Hyannis, United States, the average temperature in April hovers around 7°C (44°F). During this time, temperatures can range from a chilly -16°C (3°F) to a warm 33°C (91°F). Expect 49 mm (1.9 in) of precipitation spread across 9 days, with an average humidity level of 64%. Stay prepared for a mix of weather this month!

April Temperature in Hyannis

In April in Hyannis, the average temperature is 7°C (44°F). Maximum temperatures can reach up to 33°C (91°F), while minimum temperatures can drop as low as -16°C (3°F). It's essential to pack layers to stay comfortable during your travels, as the weather can vary dramatically.

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

The chart illustrates April temperature patterns in Hyannis, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hyannis, April typically has an average temperature of 7°C (44°F), with highs reaching up to 33°C (91°F) and lows dropping to around -16°C (3°F).
JanFebMarAprMayJunJulAugSepOctNovDec272437445569747164463830
Data source: Temperature data for Hyannis 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 Hyannis

In Hyannis in April, the total precipitation amount is 49 mm (1.9 in) spread over 9 days.

April Precipitation Trends in Hyannis

The chart displays monthly precipitation patterns in Hyannis, 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 Hyannis, April typically receives around 49 mm (1.9 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec1424634913656635846362221
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Hyannis

In Hyannis in April humidity is 64%. With an average temperature of 7°C (44°F), this humidity feels like a chilly, damp embrace that can make outdoor activities less enjoyable, leading travelers to seek warmth and comfort indoors.

April Average Humidity in Hyannis

This chart illustrates the average monthly humidity levels in Hyannis, 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 Hyannis is approximately 64%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec73%80%64%64%76%79%77%79%70%64%75%78%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Hyannis

In Hyannis 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 Hyannis.

Maximum UV Index Levels in Hyannis for April

The chart shows the monthly maximum UV Index (UVI) for Hyannis 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 Hyannis typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3568101111109643
Data source: Hyannis 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 Hyannis Compares to Other Months

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

This table compares monthly weather conditions in Hyannis, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)14 mm (0.5 inches)73%moderate
February Weather-4°C (25°F)24 mm (0.9 inches)80%moderate
March Weather3°C (38°F)63 mm (2.5 inches)64%high
April Weather7°C (44°F)49 mm (1.9 inches)64%very high
May Weather13°C (55°F)136 mm (5.4 inches)76%very high
June Weather21°C (70°F)56 mm (2.2 inches)79%extreme
July Weather23°C (74°F)63 mm (2.5 inches)77%extreme
August Weather21°C (71°F)58 mm (2.3 inches)79%very high
September Weather18°C (65°F)46 mm (1.8 inches)70%very high
October Weather8°C (46°F)36 mm (1.4 inches)64%high
November Weather3°C (38°F)22 mm (0.9 inches)75%moderate
December Weather-1°C (30°F)21 mm (0.8 inches)78%moderate

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