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September Weather in Orleans, United States

Last updated: June 24, 2025

In Orleans, United States, the average temperature in September hovers around 15°C (58°F). However, be prepared for a range, as temperatures can dip to a brisk -5°C (24°F) or soar to a warm 30°C (86°F). During this time, expect 79 mm (3.1 in) of precipitation over approximately 10 days, paired with an average humidity of 77%—perfect for those who enjoy lush, green surroundings!

September Temperature in Orleans

In September in Orleans, the average temperature is 15°C (58°F). Maximums can reach 30°C (86°F) and minimums can be as low as -5°C (24°F). This range makes Orleans a versatile destination, perfect for travelers looking to experience both warm days and cooler nights.

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

The chart illustrates September temperature patterns in Orleans, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Orleans, September typically has an average temperature of 15°C (58°F), with highs reaching up to 30°C (86°F) and lows dropping to around -5°C (24°F).
JanFebMarAprMayJunJulAugSepOctNovDec172027405462676658473222
Data source: Temperature data for Orleans 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 Orleans

In Orleans in September, the precipitation amount is 79 mm (3.1 in) over a span of 10 days.

September Precipitation Trends in Orleans

The chart displays monthly precipitation patterns in Orleans, 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 Orleans, September typically receives around 79 mm (3.1 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec8883811151031101271027914711586
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Orleans

In Orleans in September, humidity is 77%. With an average temperature of 15°C (58°F), this humidity feels like a warm blanket enveloping you, making travel a mix of refreshing breezes and occasional stickiness, which can be quite refreshing while exploring the sights.

September Average Humidity in Orleans

This chart illustrates the average monthly humidity levels in Orleans, 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 Orleans is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%85%84%78%72%75%74%77%85%86%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Orleans

In Orleans 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 Orleans.

Maximum UV Index Levels in Orleans for September

The chart shows the monthly maximum UV Index (UVI) for Orleans 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 Orleans typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997532
Data source: Orleans 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 Orleans Compares to Other Months

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

This table compares monthly weather conditions in Orleans, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-9°C (17°F)88 mm (3.5 inches)91%low
February Weather-7°C (20°F)83 mm (3.3 inches)89%moderate
March Weather-3°C (27°F)81 mm (3.2 inches)85%moderate
April Weather5°C (41°F)115 mm (4.5 inches)84%very high
May Weather12°C (54°F)103 mm (4.1 inches)78%very high
June Weather17°C (63°F)110 mm (4.3 inches)72%very high
July Weather20°C (68°F)127 mm (5.0 inches)75%very high
August Weather19°C (66°F)102 mm (4.0 inches)74%very high
September Weather15°C (58°F)79 mm (3.1 inches)77%high
October Weather8°C (47°F)147 mm (5.8 inches)85%moderate
November Weather0°C (32°F)115 mm (4.5 inches)86%moderate
December Weather-6°C (22°F)86 mm (3.4 inches)85%low

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