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September Weather in Ortonville, United States

Last updated: June 24, 2025

The average temperature in Ortonville, United States during September is a mild 17°C (63°F). However, temperatures can range widely, with minimums dipping to 2°C (35°F) and maximums soaring up to 33°C (92°F). Visitors can expect 77 mm (3.0 in) of precipitation spread over 9 days, coupled with an average humidity level of 82%.

September Temperature in Ortonville

In September, in Ortonville, the average temperature is 17°C (63°F). Maximums can reach 33°C (92°F), while minimums can drop as low as 2°C (35°F). Be prepared for a wide range of temperatures, making it essential to pack layers for your trip.

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

The chart illustrates September temperature patterns in Ortonville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ortonville, September typically has an average temperature of 17°C (63°F), with highs reaching up to 33°C (92°F) and lows dropping to around 2°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec151431415871747063473323
Data source: Temperature data for Ortonville 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 Ortonville

In Ortonville in September, the precipitation amount is 77 mm (3.0 in) over the course of 9 days.

September Precipitation Trends in Ortonville

The chart displays monthly precipitation patterns in Ortonville, 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 Ortonville, September typically receives around 77 mm (3.0 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec2117466592779812977812636
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Ortonville

In Ortonville in September, humidity is 82%. With an average temperature of 17°C (63°F), this humidity feels like a warm blanket wrapping around you—comfortable yet heavy, making outdoor activities more taxing and requiring frequent breaks for hydration.

September Average Humidity in Ortonville

This chart illustrates the average monthly humidity levels in Ortonville, 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 Ortonville is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%89%81%82%76%81%82%83%82%82%87%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Ortonville

In Ortonville 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 Ortonville.

Maximum UV Index Levels in Ortonville for September

The chart shows the monthly maximum UV Index (UVI) for Ortonville 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 Ortonville typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3557910997532
Data source: Ortonville 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 Ortonville Compares to Other Months

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

This table compares monthly weather conditions in Ortonville, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-10°C (15°F)21 mm (0.8 inches)85%moderate
February Weather-10°C (15°F)17 mm (0.7 inches)89%moderate
March Weather-1°C (31°F)46 mm (1.8 inches)81%moderate
April Weather5°C (41°F)64 mm (2.5 inches)82%high
May Weather14°C (58°F)92 mm (3.6 inches)76%very high
June Weather22°C (71°F)77 mm (3.0 inches)81%very high
July Weather23°C (74°F)98 mm (3.8 inches)82%very high
August Weather21°C (70°F)129 mm (5.1 inches)83%very high
September Weather17°C (63°F)77 mm (3.0 inches)82%high
October Weather8°C (47°F)81 mm (3.2 inches)82%moderate
November Weather1°C (33°F)26 mm (1.0 inches)87%moderate
December Weather-5°C (24°F)36 mm (1.4 inches)84%low

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