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September Weather in Saint Stephens, United States

Last updated: June 24, 2025

In September, the average temperature in Saint Stephens, United States is a pleasant 22°C (73°F). However, it can range from a cool 7°C (45°F) to a sweltering 35°C (95°F). Be prepared for some rain, as the region experiences approximately 126 mm (4.9 in) of precipitation over 11 days. With an average humidity of 75%, make sure to dress comfortably!

September Temperature in Saint Stephens

In September in Saint Stephens, the average temperature is 22°C (73°F). Maximums can reach 35°C (95°F) and minimums can be as low as 7°C (45°F). Be prepared for a warm climate with the possibility of cooler evenings, making it an ideal time to explore outdoor activities.

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

The chart illustrates September temperature patterns in Saint Stephens, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint Stephens, September typically has an average temperature of 22°C (73°F), with highs reaching up to 35°C (95°F) and lows dropping to around 7°C (45°F).
JanFebMarAprMayJunJulAugSepOctNovDec414651596875797772634944
Data source: Temperature data for Saint Stephens 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 Saint Stephens

In Saint Stephens in September, the precipitation amount is 126 mm (4.9 in) over the course of 11 days.

September Precipitation Trends in Saint Stephens

The chart displays monthly precipitation patterns in Saint Stephens, 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 Stephens, September typically receives around 126 mm (4.9 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec8712197119124938111412612087116
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Saint Stephens

In Saint Stephens in September humidity is 75%. With an average temperature of 22°C (73°F), this humidity feels like a warm, enveloping embrace, making it essential for travelers to stay hydrated and wear light, breathable clothing to enjoy their adventures comfortably.

September Average Humidity in Saint Stephens

This chart illustrates the average monthly humidity levels in Saint Stephens, 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 Stephens is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%85%84%82%83%82%80%74%75%79%87%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Saint Stephens

In Saint Stephens in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Saint Stephens.

Maximum UV Index Levels in Saint Stephens for September

The chart shows the monthly maximum UV Index (UVI) for Saint Stephens 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 Stephens typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810101111109853
Data source: Saint Stephens 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 Stephens Compares to Other Months

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

This table compares monthly weather conditions in Saint Stephens, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)87 mm (3.4 inches)86%moderate
February Weather8°C (47°F)121 mm (4.8 inches)85%high
March Weather11°C (52°F)97 mm (3.8 inches)84%very high
April Weather15°C (60°F)119 mm (4.7 inches)82%very high
May Weather20°C (69°F)124 mm (4.9 inches)83%very high
June Weather24°C (75°F)93 mm (3.6 inches)82%extreme
July Weather26°C (79°F)81 mm (3.2 inches)80%extreme
August Weather25°C (77°F)114 mm (4.5 inches)74%very high
September Weather22°C (73°F)126 mm (4.9 inches)75%very high
October Weather17°C (63°F)120 mm (4.7 inches)79%very high
November Weather9°C (49°F)87 mm (3.4 inches)87%moderate
December Weather7°C (45°F)116 mm (4.6 inches)87%moderate

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