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October Weather in St. Mary's, United States

Last updated: June 24, 2025

In October, the average temperature in St. Mary's, United States hovers around 2°C (36°F), with temperatures dipping as low as -12°C (11°F) and peaking at 18°C (64°F). Expect 78 mm (3.1 in) of precipitation spread over 14 days, and be prepared for a high humidity level of 90% that adds to the chilly atmosphere.

October Temperature in St. Mary's

In October in St. Mary's, the average temperature is 2°C (36°F). Maximums can reach up to 18°C (64°F) and minimums can drop as low as -12°C (11°F). Be prepared for a range of weather conditions if you plan to visit during this time.

October Weather in St. Mary's: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in St. Mary's, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In St. Mary's, October typically has an average temperature of 2°C (36°F), with highs reaching up to 18°C (64°F) and lows dropping to around -12°C (11°F).
JanFebMarAprMayJunJulAugSepOctNovDec71217304555565446362013
Data source: Temperature data for St. Mary's 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 St. Mary's

In St. Mary's in October, the precipitation amount is 78 mm (3.1 in) over a period of 14 days.

October Precipitation Trends in St. Mary's

The chart displays monthly precipitation patterns in St. Mary's, 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 St. Mary's, October typically receives around 78 mm (3.1 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec316554476455638691785559
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in St. Mary's

In St. Mary's in October humidity is 90%. With an average temperature of 2°C (36°F), this humidity feels like a heavy blanket wrapping around you, making every step feel sluggish and damp, and turning a simple stroll into a test of endurance for travelers.

October Average Humidity in St. Mary's

This chart illustrates the average monthly humidity levels in St. Mary's, 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 St. Mary's is approximately 90%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec98%96%85%78%80%86%89%91%92%90%93%98%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in St. Mary's

In St. Mary's in October, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in St. Mary's, you can visit Hourly UV Index in St. Mary's.

Maximum UV Index Levels in St. Mary's for October

The chart shows the monthly maximum UV Index (UVI) for St. Mary's 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 St. Mary's typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec113456653211
Data source: St. Mary's 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 St. Mary's Compares to Other Months

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

This table compares monthly weather conditions in St. Mary's, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-14°C (7°F)30 mm (1.2 inches)98%low
February Weather-11°C (12°F)65 mm (2.6 inches)96%low
March Weather-8°C (17°F)54 mm (2.1 inches)85%moderate
April Weather-1°C (30°F)47 mm (1.8 inches)78%moderate
May Weather7°C (45°F)63 mm (2.5 inches)80%moderate
June Weather13°C (55°F)55 mm (2.2 inches)86%high
July Weather14°C (57°F)63 mm (2.5 inches)89%high
August Weather12°C (54°F)86 mm (3.4 inches)91%moderate
September Weather8°C (47°F)91 mm (3.6 inches)92%moderate
October Weather2°C (36°F)78 mm (3.1 inches)90%low
November Weather-7°C (20°F)55 mm (2.2 inches)93%low
December Weather-11°C (13°F)59 mm (2.3 inches)98%low

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