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April Weather in Cos Cob, United States

Last updated: June 24, 2025

In April, the average temperature in Cos Cob, United States is a cool 10°C (50°F). Expect a minimum chill of -1°C (30°F) and a warm maximum of 26°C (79°F). With an average humidity of 78%, be prepared for the possibility of rain, as 116 mm (4.6 in) of precipitation may fall over 12 days.

April Temperature in Cos Cob

In April in Cos Cob, the average temperature is 10°C (50°F). Maximums can reach 26°C (79°F), while minimums can drop as low as -1°C (30°F). Pack accordingly to enjoy a comfortable trip, as temperatures can vary significantly during your stay.

April Weather in Cos Cob: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Cos Cob, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cos Cob, April typically has an average temperature of 10°C (50°F), with highs reaching up to 26°C (79°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec333540506070777569604638
Data source: Temperature data for Cos Cob 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 Cos Cob

In Cos Cob in April, the precipitation amount is 116 mm (4.6 in) over a span of 12 days.

April Precipitation Trends in Cos Cob

The chart displays monthly precipitation patterns in Cos Cob, 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 Cos Cob, April typically receives around 116 mm (4.6 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec6910193116112941391189313190114
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Cos Cob

In Cos Cob in April humidity is 78%. With an average temperature of 10°C (50°F), this humidity feels like a chilly dampness that can seep into your clothes, making outdoor activities less enjoyable and requiring extra layers to stay warm as you explore the area.

April Average Humidity in Cos Cob

This chart illustrates the average monthly humidity levels in Cos Cob, 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 Cos Cob is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%81%78%70%69%62%65%68%74%82%80%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Cos Cob

In Cos Cob 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 Cos Cob.

Maximum UV Index Levels in Cos Cob for April

The chart shows the monthly maximum UV Index (UVI) for Cos Cob 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 Cos Cob typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35681010998642
Data source: Cos Cob 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 Cos Cob Compares to Other Months

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

This table compares monthly weather conditions in Cos Cob, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)69 mm (2.7 inches)84%moderate
February Weather2°C (36°F)101 mm (4.0 inches)82%moderate
March Weather5°C (41°F)93 mm (3.7 inches)81%high
April Weather10°C (50°F)116 mm (4.6 inches)78%very high
May Weather15°C (60°F)112 mm (4.4 inches)69%very high
June Weather21°C (70°F)93 mm (3.7 inches)69%very high
July Weather25°C (77°F)139 mm (5.5 inches)62%very high
August Weather24°C (75°F)118 mm (4.6 inches)65%very high
September Weather21°C (69°F)93 mm (3.6 inches)68%very high
October Weather15°C (60°F)131 mm (5.2 inches)74%high
November Weather8°C (47°F)90 mm (3.6 inches)82%moderate
December Weather3°C (39°F)113 mm (4.5 inches)80%low

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