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September Weather in Sandusky, United States

Last updated: June 24, 2025

In Sandusky, United States, the average temperature in September hovers around 18°C (64°F), making it a pleasant time to explore. However, be prepared for temperature fluctuations, as it can dip to a brisk 4°C (40°F) and soar up to a balmy 31°C (87°F). Rainfall is a factor to consider, with an average of 82 mm (3.2 in) expected over 11 days, contributing to a notably humid environment with 80% average humidity. Enjoy the diversity this month brings!

September Temperature in Sandusky

In September in Sandusky, the average temperature is 18°C (64°F). Maximums can reach 31°C (87°F), and minimums can drop as low as 4°C (40°F). This variation makes it an ideal time for travelers to enjoy a range of outdoor activities while packing appropriately for both warm days and cooler evenings.

September Weather in Sandusky: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Sandusky, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sandusky, September typically has an average temperature of 18°C (64°F), with highs reaching up to 31°C (87°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec262633425364717064533932
Data source: Temperature data for Sandusky 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.

September Precipitation in Sandusky

In Sandusky in September, the precipitation amount is 82 mm (3.2 in) over the course of 11 days.

September Precipitation Trends in Sandusky

The chart displays monthly precipitation patterns in Sandusky, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Sandusky, September typically receives around 82 mm (3.2 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec70736910698938386821157764
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Sandusky

In Sandusky in September humidity is 80%. With an average temperature of 18°C (64°F), this humidity feels like a warm, damp blanket wrapping around you, making travel a bit more exhausting as the air thickens and the heat clings to your skin.

September Average Humidity in Sandusky

This chart illustrates the average monthly humidity levels in Sandusky, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Sandusky is approximately 80%, 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 September generated using information from the Copernicus Climate Change Service.

September UV Index in Sandusky

In Sandusky in September, 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 Sandusky.

Maximum UV Index Levels in Sandusky for September

The chart shows the monthly maximum UV Index (UVI) for Sandusky in September, 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 September, the maximum UV index in Sandusky typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997532
Data source: Sandusky September 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 September Weather in Sandusky Compares to Other Months

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

This table compares monthly weather conditions in Sandusky, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (26°F)70 mm (2.8 inches)88%low
February Weather-3°C (26°F)73 mm (2.9 inches)87%moderate
March Weather1°C (33°F)69 mm (2.7 inches)85%moderate
April Weather5°C (42°F)106 mm (4.2 inches)86%very high
May Weather11°C (53°F)98 mm (3.8 inches)80%very high
June Weather18°C (64°F)93 mm (3.7 inches)80%very high
July Weather21°C (71°F)83 mm (3.3 inches)80%very high
August Weather21°C (70°F)86 mm (3.4 inches)80%very high
September Weather18°C (64°F)82 mm (3.2 inches)80%high
October Weather12°C (53°F)115 mm (4.5 inches)84%moderate
November Weather4°C (39°F)77 mm (3.0 inches)89%moderate
December Weather0°C (32°F)64 mm (2.5 inches)86%low

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