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October Weather in Saint Marys, United States

Last updated: June 24, 2025

In October, the average temperature in Saint Marys, United States is a pleasant 13°C (57°F). You can expect temperatures to range from a chilly -4°C (25°F) to a sweltering 34°C (93°F). During this time, precipitation averages around 109 mm (4.3 in), typically spread over 8 days. Additionally, the average humidity level sits at 71%, making for a nuanced climate experience.

October Temperature in Saint Marys

In October in Saint Marys, the average temperature is 13°C (57°F). Maximum temperatures can reach 34°C (93°F), while minimum temperatures can drop as low as -4°C (25°F). Be prepared for a wide range of temperatures when traveling during this time.

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 13°C (57°F), with highs reaching up to 34°C (93°F) and lows dropping to around -4°C (25°F).
JanFebMarAprMayJunJulAugSepOctNovDec313246546577817772564437
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 total precipitation amount is 109 mm (4.3 in) spread over 8 days.

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 109 mm (4.3 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec382793782059690130801093330
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 71%. With an average temperature of 13°C (57°F), this humidity feels like a damp, chilly embrace that can make outdoor activities somewhat uncomfortable for traveling.

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 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%78%70%73%82%82%81%78%71%71%81%84%
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.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111109643
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-1°C (31°F)38 mm (1.5 inches)76%moderate
February Weather0°C (32°F)27 mm (1.1 inches)77%moderate
March Weather8°C (46°F)93 mm (3.7 inches)70%high
April Weather12°C (54°F)78 mm (3.1 inches)73%very high
May Weather19°C (66°F)205 mm (8.1 inches)82%very high
June Weather25°C (78°F)96 mm (3.8 inches)82%extreme
July Weather27°C (81°F)90 mm (3.6 inches)81%extreme
August Weather25°C (77°F)130 mm (5.1 inches)78%very high
September Weather22°C (72°F)80 mm (3.1 inches)71%very high
October Weather13°C (57°F)109 mm (4.3 inches)71%high
November Weather6°C (44°F)32 mm (1.3 inches)81%moderate
December Weather3°C (37°F)30 mm (1.2 inches)84%moderate

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