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September Weather in Saint Maries, United States

Last updated: June 24, 2025

In September, the average temperature in Saint Maries, United States is a mild 15°C (59°F), perfect for exploring the outdoors. However, be prepared for a wide range, as temperatures can dip to a cool -1°C (31°F) or soar to a warm 34°C (94°F). Expect 46 mm (1.8 in) of precipitation spread across 6 days, accompanied by an average humidity level of 62%. Make the most of your visit with this delightful climate!

September Temperature in Saint Maries

In September in Saint Maries, the average temperature is 15°C (59°F). Maximums can reach 34°C (94°F), while minimums can drop to as low as -1°C (31°F). Therefore, travelers should be prepared for a wide range of temperatures and pack accordingly.

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

The chart illustrates September temperature patterns in Saint Maries, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint Maries, September typically has an average temperature of 15°C (59°F), with highs reaching up to 34°C (94°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec302836445461706959453730
Data source: Temperature data for Saint Maries 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 Maries

In Saint Maries in September, the precipitation amount is 46 mm (1.8 in) over a span of 6 days.

September Precipitation Trends in Saint Maries

The chart displays monthly precipitation patterns in Saint Maries, 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 Maries, September typically receives around 46 mm (1.8 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec111142102101874991846101137130
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Saint Maries

In Saint Maries in September humidity is 62%. With an average temperature of 15°C (59°F), this humidity feels like a refreshing embrace, making it ideal for leisurely strolls and explorations without feeling overly hot or sticky.

September Average Humidity in Saint Maries

This chart illustrates the average monthly humidity levels in Saint Maries, 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 Maries is approximately 62%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%89%87%84%78%78%77%64%62%79%87%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Saint Maries

In Saint Maries 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 Maries.

Maximum UV Index Levels in Saint Maries for September

The chart shows the monthly maximum UV Index (UVI) for Saint Maries 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 Maries typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2467991097532
Data source: Saint Maries 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 Maries Compares to Other Months

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

This table compares monthly weather conditions in Saint Maries, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)111 mm (4.4 inches)89%low
February Weather-2°C (28°F)142 mm (5.6 inches)89%moderate
March Weather2°C (37°F)101 mm (4.0 inches)87%high
April Weather6°C (44°F)100 mm (4.0 inches)84%high
May Weather12°C (54°F)87 mm (3.4 inches)77%very high
June Weather16°C (61°F)49 mm (1.9 inches)78%very high
July Weather21°C (71°F)9 mm (0.3 inches)77%very high
August Weather21°C (70°F)18 mm (0.7 inches)64%very high
September Weather15°C (59°F)46 mm (1.8 inches)62%high
October Weather7°C (45°F)101 mm (4.0 inches)79%moderate
November Weather3°C (37°F)137 mm (5.4 inches)87%moderate
December Weather-1°C (30°F)130 mm (5.1 inches)90%low

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