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August Weather in Islesboro, United States

Last updated: June 24, 2025

In Islesboro, United States, the average temperature in August hovers around 18°C (65°F). Temperatures can dip to a minimum of 13°C (56°F) and rise to a maximum of 24°C (76°F). Expect about 90 mm (3.5 in) of precipitation spread over 9 days, contributing to an average humidity level of 74%. Enjoy the mild climate while staying prepared for occasional rain!

August Temperature in Islesboro

In August in Islesboro, the average temperature is 18°C (65°F). Maximums can reach 24°C (76°F) and minimums can be as low as 13°C (56°F). This pleasant weather makes Islesboro an ideal destination for travelers looking to enjoy mild and comfortable climates.

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

The chart illustrates August temperature patterns in Islesboro, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Islesboro, August typically has an average temperature of 18°C (65°F), with highs reaching up to 24°C (76°F) and lows dropping to around 13°C (56°F).
JanFebMarAprMayJunJulAugSepOctNovDec282932414957636561534233
Data source: Temperature data for Islesboro 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 Islesboro

In Islesboro in August, the precipitation amount is 90 mm (3.5 in) over the course of 9 days.

August Precipitation Trends in Islesboro

The chart displays monthly precipitation patterns in Islesboro, 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 Islesboro, August typically receives around 90 mm (3.5 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec11210889169114871009099169145160
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Islesboro

In Islesboro in August humidity is 74%. With an average temperature of 18°C (65°F), this humidity feels like a warm, sticky embrace that can make even short walks feel laborious, leading travelers to seek shade and refreshment more often.

August Average Humidity in Islesboro

This chart illustrates the average monthly humidity levels in Islesboro, 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 Islesboro is approximately 74%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%85%81%76%74%74%74%77%82%85%84%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Islesboro

In Islesboro in August, 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 Islesboro.

Maximum UV Index Levels in Islesboro for August

The chart shows the monthly maximum UV Index (UVI) for Islesboro 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 Islesboro typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457910987532
Data source: Islesboro 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 Islesboro Compares to Other Months

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

This table compares monthly weather conditions in Islesboro, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)112 mm (4.4 inches)88%low
February Weather-2°C (29°F)108 mm (4.2 inches)88%moderate
March Weather0°C (33°F)89 mm (3.5 inches)85%moderate
April Weather5°C (41°F)169 mm (6.7 inches)81%high
May Weather9°C (49°F)114 mm (4.5 inches)76%very high
June Weather14°C (58°F)87 mm (3.4 inches)74%very high
July Weather17°C (63°F)100 mm (3.9 inches)74%very high
August Weather18°C (65°F)90 mm (3.5 inches)74%very high
September Weather16°C (61°F)99 mm (3.9 inches)77%high
October Weather12°C (54°F)169 mm (6.6 inches)82%moderate
November Weather6°C (42°F)145 mm (5.7 inches)85%moderate
December Weather0°C (33°F)160 mm (6.3 inches)84%low

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