April Weather in Greenwich, United States

Last updated: June 24, 2025

In April, the average temperature in Greenwich, United States hovers around 10°C (50°F), but be prepared for the extremes—temperatures can dip to a chilly -8°C (18°F) or soar to a warm 28°C (83°F). During this month, expect approximately 123 mm (4.8 in) of precipitation spread over 15 days, contributing to a notably high average humidity of 87%. Whether you pack for warmth or rain, make sure you're ready for anything!

April Temperature in Greenwich

In April in Greenwich, the average temperature is 10°C (50°F), with maximums reaching up to 28°C (83°F) and minimums dropping as low as -8°C (18°F). Be prepared for a diverse range of weather conditions if you plan to travel during this time.

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

The chart illustrates April temperature patterns in Greenwich, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Greenwich, April typically has an average temperature of 10°C (50°F), with highs reaching up to 28°C (83°F) and lows dropping to around -8°C (18°F).
JanFebMarAprMayJunJulAugSepOctNovDec293240506270747267564134
Data source: Temperature data for Greenwich 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 Greenwich

In Greenwich in April, the precipitation amount is 123 mm (4.8 in), occurring over a span of 15 days.

April Precipitation Trends in Greenwich

The chart displays monthly precipitation patterns in Greenwich, 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 Greenwich, April typically receives around 123 mm (4.8 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec7892971231291361289179968884
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Greenwich

In Greenwich in April humidity is 87%. With an average temperature of 10°C (50°F), this humidity feels like a heavy cloak wrapping around you, making every step feel laborious and the air thick with moisture, challenging your comfort while traveling.

April Average Humidity in Greenwich

This chart illustrates the average monthly humidity levels in Greenwich, 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 Greenwich is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%87%88%81%82%81%78%78%82%89%86%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Greenwich

In Greenwich 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 Greenwich.

Maximum UV Index Levels in Greenwich for April

The chart shows the monthly maximum UV Index (UVI) for Greenwich 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 Greenwich typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356810101098642
Data source: Greenwich 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 Greenwich Compares to Other Months

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

This table compares monthly weather conditions in Greenwich, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)78 mm (3.1 inches)88%moderate
February Weather0°C (32°F)92 mm (3.6 inches)87%moderate
March Weather4°C (40°F)97 mm (3.8 inches)87%high
April Weather10°C (50°F)123 mm (4.8 inches)87%very high
May Weather16°C (62°F)129 mm (5.1 inches)81%very high
June Weather21°C (71°F)136 mm (5.4 inches)82%very high
July Weather24°C (75°F)128 mm (5.0 inches)81%very high
August Weather22°C (72°F)91 mm (3.6 inches)78%very high
September Weather20°C (67°F)79 mm (3.1 inches)78%very high
October Weather14°C (57°F)96 mm (3.8 inches)82%high
November Weather5°C (41°F)88 mm (3.4 inches)89%moderate
December Weather1°C (35°F)84 mm (3.3 inches)86%low

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