nomadseason

September Weather in Saint Francis, United States

Last updated: June 24, 2025

In Saint Francis, United States, the average temperature for September hovers around 13°C (56°F). However, be prepared for a range of temperatures, as it can dip to a chilly -4°C (25°F) or soar up to a warm 28°C (83°F). During this month, you can expect about 74 mm (2.9 in) of precipitation over 11 days, coupled with an average humidity of 85%. Stay comfortable and plan accordingly!

September Temperature in Saint Francis

In September in Saint Francis, the average temperature is 13°C (56°F), with maximums reaching up to 28°C (83°F) and minimums dropping as low as -4°C (25°F). This makes it a perfect time for travelers to experience a mix of mild and warm weather, so be sure to pack accordingly for various temperatures.

September Weather in Saint Francis: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Saint Francis, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint Francis, September typically has an average temperature of 13°C (56°F), with highs reaching up to 28°C (83°F) and lows dropping to around -4°C (25°F).
JanFebMarAprMayJunJulAugSepOctNovDec131523365060666455443018
Data source: Temperature data for Saint Francis generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Saint Francis

In Saint Francis in September, the precipitation amount is 74 mm (2.9 in) spread over the course of 11 days.

September Precipitation Trends in Saint Francis

The chart displays monthly precipitation patterns in Saint Francis, 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 Saint Francis, September typically receives around 74 mm (2.9 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec867081106919584767410910584
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Saint Francis

In Saint Francis in September humidity is 85%. With an average temperature of 13°C (56°F), this humidity feels like a damp chill that wraps around you, making outdoor activities feel heavier and less enjoyable, as layers of clothing cling to the skin and breath becomes visible in the moist air.

September Average Humidity in Saint Francis

This chart illustrates the average monthly humidity levels in Saint Francis, 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 Saint Francis is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%92%90%87%82%77%82%83%85%87%88%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Saint Francis

In Saint Francis 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 Saint Francis.

Maximum UV Index Levels in Saint Francis for September

The chart shows the monthly maximum UV Index (UVI) for Saint Francis 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 Saint Francis typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235889887532
Data source: Saint Francis 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 Saint Francis Compares to Other Months

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

This table compares monthly weather conditions in Saint Francis, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-11°C (13°F)85 mm (3.4 inches)93%low
February Weather-10°C (15°F)70 mm (2.8 inches)92%moderate
March Weather-5°C (24°F)81 mm (3.2 inches)90%moderate
April Weather2°C (36°F)106 mm (4.2 inches)87%very high
May Weather10°C (51°F)91 mm (3.6 inches)82%very high
June Weather15°C (60°F)95 mm (3.7 inches)77%very high
July Weather19°C (66°F)84 mm (3.3 inches)81%very high
August Weather18°C (64°F)76 mm (3.0 inches)83%very high
September Weather13°C (56°F)74 mm (2.9 inches)85%high
October Weather7°C (44°F)109 mm (4.3 inches)87%moderate
November Weather-1°C (30°F)105 mm (4.1 inches)87%moderate
December Weather-8°C (18°F)84 mm (3.3 inches)90%low

Compare Saint Francis's Climate with Cities Worldwide