nomadseason

August Weather in Saint Marys, United States

Last updated: June 24, 2025

In August, the average temperature in Saint Marys, United States hovers around 23°C (74°F), creating a comfortable atmosphere. Expect minimums of 13°C (55°F) and maximums reaching up to 34°C (94°F). However, prepare for some rain, as the area receives 110 mm (4.3 in) of precipitation over 13 days, coupled with an average humidity of 73%—perfect for lush landscapes!

August Temperature in Saint Marys

In August in Saint Marys, the average temperature is 23°C (74°F). The maximum can reach 34°C (94°F), and the minimum can be as low as 13°C (55°F). This pleasant range makes it an ideal time for outdoor activities and sightseeing.

August Weather in Saint Marys: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Saint Marys, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint Marys, August typically has an average temperature of 23°C (74°F), with highs reaching up to 34°C (94°F) and lows dropping to around 13°C (55°F).
JanFebMarAprMayJunJulAugSepOctNovDec333845546471767469594438
Data source: Temperature data for Saint Marys generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

August Precipitation in Saint Marys

In Saint Marys in August, the total precipitation amount is 110 mm (4.3 in) over the course of 13 days.

August Precipitation Trends in Saint Marys

The chart displays monthly precipitation patterns in Saint Marys, 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 Saint Marys, August typically receives around 110 mm (4.3 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec9512711715115018013411011111788119
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

August Humidity in Saint Marys

In Saint Marys in August, humidity is 73%. With an average temperature of 23°C (74°F), this humidity feels like a warm, enveloping blanket, making traveling a bit sweaty and heavy, but still pleasant if you stay hydrated and take breaks in the shade.

August Average Humidity in Saint Marys

This chart illustrates the average monthly humidity levels in Saint Marys, 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 Saint Marys is approximately 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%88%87%82%84%82%73%74%81%89%86%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Saint Marys

In Saint Marys 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 Saint Marys.

Maximum UV Index Levels in Saint Marys for August

The chart shows the monthly maximum UV Index (UVI) for Saint Marys 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 Saint Marys typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098643
Data source: Saint Marys 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 Saint Marys Compares to Other Months

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

This table compares monthly weather conditions in Saint Marys, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)95 mm (3.7 inches)88%moderate
February Weather3°C (38°F)127 mm (5.0 inches)88%moderate
March Weather7°C (45°F)117 mm (4.6 inches)88%high
April Weather12°C (54°F)151 mm (6.0 inches)86%very high
May Weather18°C (65°F)150 mm (5.9 inches)82%very high
June Weather22°C (72°F)180 mm (7.1 inches)84%very high
July Weather24°C (76°F)134 mm (5.3 inches)82%very high
August Weather23°C (74°F)110 mm (4.3 inches)73%very high
September Weather21°C (70°F)111 mm (4.4 inches)73%very high
October Weather15°C (59°F)117 mm (4.6 inches)81%high
November Weather7°C (44°F)88 mm (3.5 inches)89%moderate
December Weather4°C (39°F)119 mm (4.7 inches)86%moderate

Compare Saint Marys's Climate with Cities Worldwide