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September Weather in Windom, United States

Last updated: June 24, 2025

In Windom, United States, the average temperature in September hovers around 18°C (65°F). You'll experience a range of weather, with minimum temperatures dipping to 3°C (37°F) and soaring up to a comfortable 33°C (91°F). Expect about 114 mm (4.5 in) of precipitation spread over 9 days, alongside an average humidity level of 75%.

September Temperature in Windom

In September in Windom, the average temperature is 18°C (65°F), with maximums reaching 33°C (91°F) and minimums falling as low as 3°C (37°F). This makes it an ideal time for travelers who enjoy mild to warm weather, but it's wise to pack for both warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Windom, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Windom, September typically has an average temperature of 18°C (65°F), with highs reaching up to 33°C (91°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec181734445972747065483425
Data source: Temperature data for Windom 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 Windom

In Windom in September, the precipitation amount is 114 mm (4.5 in) over the course of 9 days.

September Precipitation Trends in Windom

The chart displays monthly precipitation patterns in Windom, 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 Windom, September typically receives around 114 mm (4.5 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec33336992133128105117114963341
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Windom

In Windom in September, humidity is 75%. With an average temperature of 18°C (65°F), this humidity feels like a warm, enveloping blanket that can make outdoor exploration feel a bit stifling, potentially leading to discomfort during travel activities.

September Average Humidity in Windom

This chart illustrates the average monthly humidity levels in Windom, 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 Windom is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%84%75%79%74%81%82%80%75%77%85%83%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Windom

In Windom 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 Windom.

Maximum UV Index Levels in Windom for September

The chart shows the monthly maximum UV Index (UVI) for Windom 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 Windom typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35689111098533
Data source: Windom 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 Windom Compares to Other Months

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

This table compares monthly weather conditions in Windom, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (18°F)33 mm (1.3 inches)80%moderate
February Weather-9°C (17°F)33 mm (1.3 inches)84%moderate
March Weather1°C (34°F)69 mm (2.7 inches)75%high
April Weather7°C (44°F)92 mm (3.6 inches)79%very high
May Weather15°C (59°F)133 mm (5.2 inches)74%very high
June Weather22°C (72°F)128 mm (5.0 inches)81%extreme
July Weather23°C (74°F)105 mm (4.1 inches)82%very high
August Weather21°C (71°F)117 mm (4.6 inches)80%very high
September Weather18°C (65°F)114 mm (4.5 inches)75%very high
October Weather9°C (48°F)96 mm (3.8 inches)77%moderate
November Weather1°C (34°F)33 mm (1.3 inches)85%moderate
December Weather-4°C (25°F)41 mm (1.6 inches)83%moderate

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