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September Weather in Fosston, United States

Last updated: June 24, 2025

In September, the average temperature in Fosston, United States hovers around 15°C (59°F), making it a pleasant time to explore. However, be prepared for temperature fluctuations, with a minimum dipping to -3°C (26°F) and a maximum soaring to 30°C (87°F). Expect about 105 mm (4.2 in) of precipitation spread over 11 days, contributing to an average humidity level of 77%. Pack accordingly!

September Temperature in Fosston

In September in Fosston, the average temperature is 15°C (59°F). Maximum temperatures can reach 30°C (87°F) and minimum temperatures can be as low as -3°C (26°F). This variation makes it essential to pack layers for your trip, ensuring you're prepared for both warm days and cooler nights.

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

The chart illustrates September temperature patterns in Fosston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fosston, September typically has an average temperature of 15°C (59°F), with highs reaching up to 30°C (87°F) and lows dropping to around -3°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec9827385567716759432616
Data source: Temperature data for Fosston 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 Fosston

In Fosston in September, the total precipitation amount reaches 105 mm (4.2 in) over the course of 11 days.

September Precipitation Trends in Fosston

The chart displays monthly precipitation patterns in Fosston, 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 Fosston, September typically receives around 105 mm (4.2 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec2124275650827184106812843
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Fosston

In Fosston in September, humidity is 77%. With an average temperature of 15°C (59°F), this humidity feels like a warm blanket enveloping you, making it essential to stay hydrated and choose light, breathable clothing for comfortable travel.

September Average Humidity in Fosston

This chart illustrates the average monthly humidity levels in Fosston, 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 Fosston is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%92%85%81%75%79%77%78%77%79%86%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Fosston

In Fosston 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 Fosston.

Maximum UV Index Levels in Fosston for September

The chart shows the monthly maximum UV Index (UVI) for Fosston 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 Fosston typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245789987532
Data source: Fosston 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 Fosston Compares to Other Months

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

This table compares monthly weather conditions in Fosston, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-13°C (9°F)21 mm (0.8 inches)90%low
February Weather-13°C (9°F)24 mm (0.9 inches)92%moderate
March Weather-3°C (27°F)27 mm (1.1 inches)85%moderate
April Weather3°C (38°F)56 mm (2.2 inches)81%high
May Weather13°C (55°F)50 mm (2.0 inches)75%very high
June Weather20°C (68°F)82 mm (3.2 inches)79%very high
July Weather22°C (71°F)71 mm (2.8 inches)76%very high
August Weather19°C (67°F)84 mm (3.3 inches)78%very high
September Weather15°C (59°F)105 mm (4.2 inches)77%high
October Weather6°C (43°F)81 mm (3.2 inches)79%moderate
November Weather-3°C (26°F)27 mm (1.1 inches)86%moderate
December Weather-9°C (16°F)43 mm (1.7 inches)86%low

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