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August Weather in Calais, United States

Last updated: June 24, 2025

In August, the average temperature in Calais, United States hovers around 20°C (68°F), making it a pleasant time to visit. However, be prepared for a range of temperatures, with the minimum dropping to 8°C (46°F) and the maximum soaring to 33°C (92°F). Expect some rain, as precipitation averages 76 mm (3.0 in) over 9 days, coupled with a high average humidity of 82%.

August Temperature in Calais

In August in Calais, the average temperature is 20°C (68°F). Maximums can reach 33°C (92°F) and minimums can be as low as 8°C (46°F). This diverse climate makes Calais an ideal destination for travelers seeking both warm days and cooler evenings.

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

The chart illustrates August temperature patterns in Calais, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Calais, August typically has an average temperature of 20°C (68°F), with highs reaching up to 33°C (92°F) and lows dropping to around 8°C (46°F).
JanFebMarAprMayJunJulAugSepOctNovDec212330425262686860503726
Data source: Temperature data for Calais 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 Calais

In Calais in August, the precipitation amount is 76 mm (3.0 in) spread over a period of 9 days.

August Precipitation Trends in Calais

The chart displays monthly precipitation patterns in Calais, 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 Calais, August typically receives around 76 mm (3.0 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec99907212010791917688109136122
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Calais

In Calais in August humidity is 82%. With an average temperature of 20°C (68°F), this humidity feels like a warm, enveloping blanket that makes traveling a bit sluggish but surprisingly refreshing, as long as you take breaks in shaded areas to cool off.

August Average Humidity in Calais

This chart illustrates the average monthly humidity levels in Calais, 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 Calais is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%84%82%80%78%82%84%82%82%82%84%82%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Calais

In Calais 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 Calais.

Maximum UV Index Levels in Calais for August

The chart shows the monthly maximum UV Index (UVI) for Calais 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 Calais typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245799887532
Data source: Calais 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 Calais Compares to Other Months

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

This table compares monthly weather conditions in Calais, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)98 mm (3.9 inches)83%low
February Weather-5°C (23°F)90 mm (3.5 inches)84%moderate
March Weather-1°C (30°F)72 mm (2.8 inches)82%moderate
April Weather5°C (42°F)119 mm (4.7 inches)80%high
May Weather11°C (53°F)107 mm (4.2 inches)78%very high
June Weather17°C (62°F)91 mm (3.6 inches)82%very high
July Weather20°C (68°F)91 mm (3.6 inches)84%very high
August Weather20°C (68°F)76 mm (3.0 inches)82%very high
September Weather16°C (61°F)88 mm (3.5 inches)82%high
October Weather10°C (50°F)109 mm (4.3 inches)82%moderate
November Weather3°C (37°F)136 mm (5.4 inches)84%moderate
December Weather-3°C (26°F)122 mm (4.8 inches)82%low

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