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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 15°C (59°F). However, temperatures can swing dramatically, with a minimum of -4°C (26°F) and a maximum of 34°C (93°F). Expect 108 mm (4.3 in) of precipitation spread over 11 days, and prepare for a relatively high average humidity of 76%.

October Temperature in Saint Clair

In October in Saint Clair, the average temperature is 15°C (59°F). The maximum can reach 34°C (93°F), while the minimum can drop as low as -4°C (26°F). This variety in temperatures means travelers should be prepared for both warm days and potentially chilly 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 15°C (59°F), with highs reaching up to 34°C (93°F) and lows dropping to around -4°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec333647556675797672594540
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 108 mm (4.3 in) over the course of 11 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 108 mm (4.3 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec76841261301548798131591086958
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 76%. With an average temperature of 15°C (59°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities less enjoyable and often leading to a quick sense of fatigue while traveling.

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 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%80%80%82%83%81%80%76%76%85%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 is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, 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 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111109753
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 Weather1°C (34°F)76 mm (3.0 inches)82%moderate
February Weather2°C (37°F)84 mm (3.3 inches)80%moderate
March Weather9°C (48°F)126 mm (5.0 inches)80%high
April Weather13°C (55°F)130 mm (5.1 inches)80%very high
May Weather19°C (66°F)154 mm (6.1 inches)82%very high
June Weather24°C (76°F)87 mm (3.4 inches)83%extreme
July Weather26°C (79°F)98 mm (3.8 inches)81%extreme
August Weather24°C (76°F)131 mm (5.1 inches)80%very high
September Weather22°C (72°F)59 mm (2.3 inches)76%very high
October Weather15°C (59°F)108 mm (4.3 inches)76%high
November Weather7°C (45°F)69 mm (2.7 inches)85%moderate
December Weather4°C (40°F)58 mm (2.3 inches)86%moderate

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