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October Weather in Bay City, United States

Last updated: June 24, 2025

In October, the average temperature in Bay City, United States hovers around 12°C (54°F), offering a mild climate for visitors. Expect minimum temperatures to dip to 4°C (40°F), while the maximum can reach a pleasant 20°C (68°F). Be prepared for some rain, as the region experiences an average precipitation of 176 mm (6.9 in) over 15 days, contributing to an average humidity of 81%.

October Temperature in Bay City

In October, in Bay City, the average temperature is 12°C (54°F). The maximum can reach 20°C (68°F), while the minimum can drop to as low as 4°C (40°F). It’s advisable to pack layers to stay comfortable during your travels.

October Weather in Bay City: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Bay City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bay City, October typically has an average temperature of 12°C (54°F), with highs reaching up to 20°C (68°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec464446485256596059545046
Data source: Temperature data for Bay City 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 Bay City

In Bay City in October, the precipitation amount is 176 mm (6.9 in) distributed over 15 days.

October Precipitation Trends in Bay City

The chart displays monthly precipitation patterns in Bay City, 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 Bay City, October typically receives around 176 mm (6.9 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec2702441921577767161896176274301
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Bay City

In Bay City in October humidity is 81%. With an average temperature of 12°C (54°F), this humidity feels like a damp blanket enveloping you, making travel sluggish and uncomfortable as you battle the stickiness while trying to enjoy your surroundings.

October Average Humidity in Bay City

This chart illustrates the average monthly humidity levels in Bay City, 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 Bay City is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%84%85%83%83%84%82%74%71%81%87%87%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Bay City

In Bay City 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 Bay City.

Maximum UV Index Levels in Bay City for October

The chart shows the monthly maximum UV Index (UVI) for Bay City 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 Bay City typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec23569101087532
Data source: Bay City 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 Bay City Compares to Other Months

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

This table compares monthly weather conditions in Bay City, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (46°F)270 mm (10.6 inches)85%low
February Weather7°C (44°F)244 mm (9.6 inches)84%moderate
March Weather8°C (46°F)192 mm (7.6 inches)85%moderate
April Weather9°C (49°F)157 mm (6.2 inches)83%high
May Weather11°C (53°F)77 mm (3.0 inches)83%very high
June Weather14°C (57°F)67 mm (2.6 inches)83%very high
July Weather15°C (59°F)16 mm (0.6 inches)82%very high
August Weather15°C (60°F)17 mm (0.7 inches)74%very high
September Weather15°C (59°F)96 mm (3.8 inches)71%high
October Weather12°C (54°F)176 mm (6.9 inches)81%moderate
November Weather10°C (50°F)274 mm (10.8 inches)87%moderate
December Weather8°C (46°F)301 mm (11.8 inches)87%low

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