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October Weather in Saint Marys, United States

Last updated: June 24, 2025

In Saint Marys, United States, the average temperature in October hovers around 14°C (57°F). Expect a chilly minimum of -2°C (29°F) and the occasional toasty maximum of 33°C (91°F). During this month, the region can anticipate 96 mm (3.8 in) of precipitation spread over 13 days, contributing to an average humidity of 82%.

October Temperature in Saint Marys

In October in Saint Marys, the average temperature is 14°C (57°F), with maximums reaching 33°C (91°F) and minimums plummeting to as low as -2°C (29°F). It's advisable to pack layers to accommodate the wide temperature range while enjoying your travels.

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

The chart illustrates October 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, October typically has an average temperature of 14°C (57°F), with highs reaching up to 33°C (91°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec293241516372767368574135
Data source: Temperature data for Saint Marys 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.

October Precipitation in Saint Marys

In Saint Marys in October, the precipitation amount is 96 mm (3.8 in) spread over 13 days, indicating a relatively rainy period.

October Precipitation Trends in Saint Marys

The chart displays monthly precipitation patterns in Saint Marys, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Saint Marys, October typically receives around 96 mm (3.8 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec74931029813012510910973968569
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Saint Marys

In Saint Marys in October, humidity is 82%. With an average temperature of 14°C (57°F), this humidity feels like a thick blanket enveloping you, making outdoor activities uncomfortable and travel more challenging due to the heavy, damp air.

October Average Humidity in Saint Marys

This chart illustrates the average monthly humidity levels in Saint Marys, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Saint Marys is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%87%88%81%82%81%78%78%82%89%86%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Saint Marys

In Saint Marys in October, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Saint Marys, you can refer to this Hourly UV Index in Saint Marys.

Maximum UV Index Levels in Saint Marys for October

The chart shows the monthly maximum UV Index (UVI) for Saint Marys in October, 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 October, the maximum UV index in Saint Marys typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
Data source: Saint Marys October 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 October 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 October’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 October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (30°F)74 mm (2.9 inches)88%moderate
February Weather0°C (32°F)93 mm (3.7 inches)87%moderate
March Weather5°C (42°F)102 mm (4.0 inches)87%high
April Weather10°C (51°F)98 mm (3.9 inches)87%very high
May Weather17°C (63°F)130 mm (5.1 inches)81%very high
June Weather22°C (72°F)125 mm (4.9 inches)82%very high
July Weather24°C (76°F)109 mm (4.3 inches)81%very high
August Weather23°C (73°F)109 mm (4.3 inches)78%very high
September Weather20°C (69°F)73 mm (2.9 inches)78%very high
October Weather14°C (57°F)96 mm (3.8 inches)82%high
November Weather5°C (42°F)85 mm (3.4 inches)89%moderate
December Weather2°C (35°F)69 mm (2.7 inches)86%low

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