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September Weather in Ortonville, United States

Last updated: June 24, 2025

In Ortonville, United States, the average temperature in September is a pleasant 18°C (65°F). However, be prepared for a range, as temperatures can dip to a cool 2°C (36°F) or soar to a warm 34°C (93°F). With an average precipitation of 77 mm (3.0 in) spread over about 10 days, and humidity levels hovering around 80%, it's a month of varied weather to enjoy.

September Temperature in Ortonville

In September in Ortonville, the average temperature is 18°C (65°F). The maximum can reach 34°C (93°F), while the minimum can drop as low as 2°C (36°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 18°C (65°F), with highs reaching up to 34°C (93°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec252736465969747265533832
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 total precipitation amount is 77 mm (3.0 in) spread over a duration of 10 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 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec636768921081038784771067053
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 80%. With an average temperature of 18°C (65°F), this humidity feels like wandering through a warm, damp blanket, making every step slightly heavy and resulting in a constant sheen of sweat, which can be both refreshing and exhausting for travelers.

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 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 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.
JanFebMarAprMayJunJulAugSepOctNovDec24589101097532
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-4°C (26°F)63 mm (2.5 inches)88%low
February Weather-3°C (27°F)67 mm (2.6 inches)87%moderate
March Weather2°C (36°F)68 mm (2.7 inches)85%moderate
April Weather8°C (46°F)92 mm (3.6 inches)86%very high
May Weather15°C (59°F)108 mm (4.3 inches)80%very high
June Weather21°C (70°F)103 mm (4.1 inches)80%very high
July Weather23°C (74°F)87 mm (3.4 inches)80%very high
August Weather22°C (72°F)84 mm (3.3 inches)80%very high
September Weather18°C (65°F)77 mm (3.0 inches)80%high
October Weather12°C (53°F)106 mm (4.2 inches)84%moderate
November Weather4°C (39°F)70 mm (2.7 inches)89%moderate
December Weather0°C (32°F)53 mm (2.1 inches)86%low

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