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August Weather in Groton, United States

Last updated: June 24, 2025

In August, the average temperature in Groton, United States hovers around 22°C (73°F). Temperatures can range from a comfortable 15°C (60°F) to a warm 28°C (83°F). During this month, expect about 101 mm (4.0 in) of precipitation spread over 9 days, coupled with an average humidity level of 76%. Enjoy the mild climate!

August Temperature in Groton

In August in Groton, the average temperature is 22°C (73°F). The maximum can reach 28°C (83°F), while the minimum can drop to as low as 15°C (60°F). This mild climate makes Groton an ideal destination for travelers seeking pleasant weather and outdoor activities.

August Weather in Groton: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Groton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Groton, August typically has an average temperature of 22°C (73°F), with highs reaching up to 28°C (83°F) and lows dropping to around 15°C (60°F).
JanFebMarAprMayJunJulAugSepOctNovDec353639465564727268604840
Data source: Temperature data for Groton 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.

August Precipitation in Groton

In Groton in August, the total precipitation amount is 101 mm (4.0 in), occurring over a span of 9 days.

August Precipitation Trends in Groton

The chart displays monthly precipitation patterns in Groton, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Groton, August typically receives around 101 mm (4.0 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec8310910813611984115101101157113141
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Groton

In Groton in August, humidity is 76%. With an average temperature of 22°C (73°F), this humidity feels like a warm embrace that envelops you, making travel both refreshing and slightly steamy, as the air clings warmly to your skin.

August Average Humidity in Groton

This chart illustrates the average monthly humidity levels in Groton, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Groton is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%84%82%79%75%78%76%76%76%75%80%80%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Groton

In Groton in August, 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 Groton.

Maximum UV Index Levels in Groton for August

The chart shows the monthly maximum UV Index (UVI) for Groton in August, 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 August, the maximum UV index in Groton typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35689101098642
Data source: Groton August 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 August Weather in Groton Compares to Other Months

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

This table compares monthly weather conditions in Groton, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (35°F)83 mm (3.3 inches)84%moderate
February Weather2°C (36°F)109 mm (4.3 inches)84%moderate
March Weather4°C (39°F)108 mm (4.3 inches)82%high
April Weather8°C (47°F)136 mm (5.3 inches)79%very high
May Weather13°C (55°F)119 mm (4.7 inches)75%very high
June Weather18°C (64°F)84 mm (3.3 inches)78%very high
July Weather22°C (72°F)115 mm (4.5 inches)76%very high
August Weather22°C (73°F)101 mm (4.0 inches)76%very high
September Weather20°C (68°F)101 mm (4.0 inches)75%very high
October Weather16°C (60°F)157 mm (6.2 inches)75%high
November Weather9°C (49°F)113 mm (4.4 inches)80%moderate
December Weather4°C (40°F)141 mm (5.6 inches)80%low

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