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September Weather in Milbank, United States

Last updated: June 24, 2025

In Milbank, United States, the average temperature in September hovers around 17°C (63°F). Temperatures can range from a chilly 1°C (35°F) to a warm 33°C (92°F). Expect about 81 mm (3.2 in) of precipitation spread over 9 days, with an average humidity level of 82%.

September Temperature in Milbank

In September in Milbank, the average temperature is 17°C (63°F). Maximums can reach 33°C (92°F), while minimums can drop as low as 1°C (35°F). Be sure to pack layers to comfortably enjoy the varied temperatures during your travels.

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

The chart illustrates September temperature patterns in Milbank, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Milbank, 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 1°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec151431415770747063463323
Data source: Temperature data for Milbank 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 Milbank

In Milbank in September, the precipitation amount is 81 mm (3.2 in) spread over a duration of 9 days.

September Precipitation Trends in Milbank

The chart displays monthly precipitation patterns in Milbank, 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 Milbank, September typically receives around 81 mm (3.2 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec2217476292788812681792536
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Milbank

In Milbank 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 Milbank

This chart illustrates the average monthly humidity levels in Milbank, 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 Milbank 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 Milbank

In Milbank 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 Milbank.

Maximum UV Index Levels in Milbank for September

The chart shows the monthly maximum UV Index (UVI) for Milbank 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 Milbank typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3557910998532
Data source: Milbank 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 Milbank Compares to Other Months

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

This table compares monthly weather conditions in Milbank, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-10°C (15°F)22 mm (0.9 inches)85%moderate
February Weather-10°C (15°F)17 mm (0.7 inches)89%moderate
March Weather-1°C (31°F)47 mm (1.8 inches)81%moderate
April Weather5°C (41°F)62 mm (2.4 inches)82%high
May Weather14°C (57°F)92 mm (3.6 inches)76%very high
June Weather21°C (71°F)78 mm (3.1 inches)81%very high
July Weather23°C (74°F)88 mm (3.5 inches)82%very high
August Weather21°C (70°F)126 mm (5.0 inches)83%very high
September Weather17°C (63°F)81 mm (3.2 inches)82%very high
October Weather8°C (47°F)79 mm (3.1 inches)82%moderate
November Weather1°C (33°F)25 mm (1.0 inches)87%moderate
December Weather-5°C (24°F)36 mm (1.4 inches)84%low

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