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October Weather in Saint Clair, United States

Last updated: June 24, 2025

In Saint Clair, United States, the average temperature in October hovers around 12°C (55°F). Expect a range that dips to a chilly 0°C (32°F) and can peak at a warm 27°C (80°F). With an average precipitation of 113 mm (4.5 in) spread over 15 days, it’s a month where humidity is typically high at 84%. Be prepared for a mix of cool and warm days!

October Temperature in Saint Clair

In October in Saint Clair, the average temperature is 12°C (55°F). The maximum can reach 27°C (80°F) and the minimum can be as low as 0°C (32°F). It's a great time to visit Saint Clair for those who enjoy mild weather and the possibility of both warm days and cooler nights.

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

The chart illustrates October temperature patterns in Saint Clair, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint Clair, October typically has an average temperature of 12°C (55°F), with highs reaching up to 27°C (80°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec272836455768747266544033
Data source: Temperature data for Saint Clair 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 Clair

In Saint Clair in October, the precipitation amount is 113 mm (4.5 in) over the course of 15 days.

October Precipitation Trends in Saint Clair

The chart displays monthly precipitation patterns in Saint Clair, 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 Clair, October typically receives around 113 mm (4.5 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec70737097105938280771138263
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Saint Clair

In Saint Clair in October, humidity is 84%. With an average temperature of 12°C (55°F), this humidity feels like a thick blanket wrapping around you, making it a challenge for traveling as you might feel sticky and uncomfortable while exploring the sights.

October Average Humidity in Saint Clair

This chart illustrates the average monthly humidity levels in Saint Clair, 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 Clair is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%85%86%80%80%80%81%80%84%90%86%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Saint Clair

In Saint Clair in October, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Saint Clair.

Maximum UV Index Levels in Saint Clair for October

The chart shows the monthly maximum UV Index (UVI) for Saint Clair 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 Clair typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997542
Data source: Saint Clair 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 Clair Compares to Other Months

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

This table compares monthly weather conditions in Saint Clair, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)70 mm (2.8 inches)88%low
February Weather-2°C (29°F)73 mm (2.9 inches)87%moderate
March Weather2°C (36°F)70 mm (2.7 inches)85%moderate
April Weather7°C (46°F)97 mm (3.8 inches)86%very high
May Weather14°C (58°F)105 mm (4.1 inches)80%very high
June Weather20°C (69°F)93 mm (3.6 inches)80%very high
July Weather23°C (74°F)82 mm (3.2 inches)80%very high
August Weather22°C (73°F)80 mm (3.2 inches)80%very high
September Weather19°C (66°F)77 mm (3.0 inches)80%high
October Weather12°C (55°F)113 mm (4.5 inches)84%moderate
November Weather4°C (40°F)82 mm (3.2 inches)89%moderate
December Weather0°C (33°F)63 mm (2.5 inches)86%low

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