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September Weather in Owatonna, United States

Last updated: June 24, 2025

In Owatonna, United States, the average temperature in September is a comfortable 18°C (64°F). However, temperatures can vary significantly, with a minimum of 2°C (36°F) and a maximum of 33°C (91°F). Expect 133 mm (5.2 in) of precipitation spread over approximately 9 days, and enjoy the moderate 75% humidity that adds to the region's charm.

September Temperature in Owatonna

In September in Owatonna, the average temperature is 18°C (64°F). Maximums can reach 33°C (91°F), and minimums can be as low as 2°C (36°F). This makes Owatonna a great destination for travelers looking to experience a range of temperatures, from warm days to cooler nights.

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

The chart illustrates September temperature patterns in Owatonna, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Owatonna, September typically has an average temperature of 18°C (64°F), with highs reaching up to 33°C (91°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec171633445971737064483425
Data source: Temperature data for Owatonna 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 Owatonna

In Owatonna in September, the precipitation amount is 133 mm (5.2 in) spread over a duration of 9 days.

September Precipitation Trends in Owatonna

The chart displays monthly precipitation patterns in Owatonna, 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 Owatonna, September typically receives around 133 mm (5.2 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec35436693140123104122133974144
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Owatonna

In Owatonna in September, humidity is 75%. With an average temperature of 18°C (64°F), this humidity feels like a warm blanket enveloping you, making your travels a bit sticky and requiring frequent breaks in the shade to stay comfortable.

September Average Humidity in Owatonna

This chart illustrates the average monthly humidity levels in Owatonna, 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 Owatonna is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%84%80%81%74%81%80%77%75%80%87%83%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Owatonna

In Owatonna in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Owatonna.

Maximum UV Index Levels in Owatonna for September

The chart shows the monthly maximum UV Index (UVI) for Owatonna 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 Owatonna typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35589101098533
Data source: Owatonna 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 Owatonna Compares to Other Months

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

This table compares monthly weather conditions in Owatonna, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-9°C (17°F)35 mm (1.4 inches)82%moderate
February Weather-9°C (16°F)43 mm (1.7 inches)84%moderate
March Weather1°C (33°F)66 mm (2.6 inches)80%moderate
April Weather6°C (44°F)92 mm (3.6 inches)81%very high
May Weather15°C (59°F)140 mm (5.5 inches)74%very high
June Weather22°C (71°F)123 mm (4.9 inches)80%very high
July Weather23°C (74°F)104 mm (4.1 inches)80%very high
August Weather21°C (70°F)122 mm (4.8 inches)77%very high
September Weather18°C (64°F)133 mm (5.2 inches)75%very high
October Weather9°C (49°F)97 mm (3.8 inches)80%moderate
November Weather1°C (34°F)41 mm (1.6 inches)87%moderate
December Weather-4°C (25°F)44 mm (1.7 inches)83%moderate

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