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August Weather in Guernsey, United States

Last updated: June 24, 2025

In August, the average temperature in Guernsey, United States is a warm 23°C (74°F). However, temperatures can vary significantly, with minimums dropping to 8°C (47°F) and maximums soaring up to 37°C (100°F). Visitors can expect some precipitation, averaging 16 mm (0.6 in) spread over 4 days, complemented by a high average humidity of 85%.

August Temperature in Guernsey

In August, in Guernsey, the average temperature is 23°C (74°F). Maximum temperatures can reach 37°C (100°F), while minimums can drop as low as 8°C (47°F). This wide range of temperatures makes it essential to pack both light clothing and warmer layers for your travel.

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

The chart illustrates August temperature patterns in Guernsey, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Guernsey, August typically has an average temperature of 23°C (74°F), with highs reaching up to 37°C (100°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec312839465570767465474033
Data source: Temperature data for Guernsey 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 Guernsey

In Guernsey in August, the precipitation amount is 16 mm (0.6 in) over a span of 4 days.

August Precipitation Trends in Guernsey

The chart displays monthly precipitation patterns in Guernsey, 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 Guernsey, August typically receives around 16 mm (0.6 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec122350458537271624331717
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Guernsey

In Guernsey in August humidity is 85%. With an average temperature of 23°C (74°F), this humidity feels like a thick, steamy blanket wrapping around you, making outdoor activities draining and sweaty, and leaving you longing for a cool breeze or a refreshing drink to ease the discomfort while traveling.

August Average Humidity in Guernsey

This chart illustrates the average monthly humidity levels in Guernsey, 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 Guernsey is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec73%78%64%66%74%84%85%85%76%71%73%75%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Guernsey

In Guernsey in August, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Guernsey.

Maximum UV Index Levels in Guernsey for August

The chart shows the monthly maximum UV Index (UVI) for Guernsey 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 Guernsey typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35710101111108643
Data source: Guernsey 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 Guernsey Compares to Other Months

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

This table compares monthly weather conditions in Guernsey, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)12 mm (0.5 inches)73%moderate
February Weather-2°C (29°F)23 mm (0.9 inches)78%moderate
March Weather4°C (39°F)50 mm (2.0 inches)64%high
April Weather8°C (46°F)45 mm (1.8 inches)66%very high
May Weather13°C (55°F)85 mm (3.3 inches)74%very high
June Weather21°C (70°F)37 mm (1.5 inches)84%extreme
July Weather25°C (77°F)27 mm (1.1 inches)85%extreme
August Weather23°C (74°F)16 mm (0.6 inches)85%very high
September Weather19°C (66°F)24 mm (0.9 inches)76%very high
October Weather8°C (47°F)33 mm (1.3 inches)71%high
November Weather4°C (40°F)17 mm (0.7 inches)73%moderate
December Weather1°C (33°F)17 mm (0.7 inches)75%moderate

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