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September Weather in Seymour, United States

Last updated: June 24, 2025

In September, the average temperature in Seymour, United States hovers around 22°C (72°F). Expect a minimum of 7°C (45°F) and a maximum reaching 34°C (93°F). During this month, precipitation typically measures 58 mm (2.3 in) over approximately 6 days, while the average humidity sits at a comfortable 64%.

September Temperature in Seymour

In September in Seymour, the average temperature is 22°C (72°F). Maximum temperatures can reach 34°C (93°F), while minimum temperatures can drop as low as 7°C (45°F). This makes Seymour an ideal destination for travelers who enjoy mild weather with the opportunity for both warm days and cooler nights.

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

The chart illustrates September temperature patterns in Seymour, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Seymour, September typically has an average temperature of 22°C (72°F), with highs reaching up to 34°C (93°F) and lows dropping to around 7°C (45°F).
JanFebMarAprMayJunJulAugSepOctNovDec343748546574787572584540
Data source: Temperature data for Seymour 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 Seymour

In Seymour in September, the precipitation amount is 58 mm (2.3 in) over the course of 6 days.

September Precipitation Trends in Seymour

The chart displays monthly precipitation patterns in Seymour, 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 Seymour, September typically receives around 58 mm (2.3 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec809414717418310285109581377263
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Seymour

In Seymour in September humidity is 64%. With an average temperature of 22°C (72°F), this humidity feels like a warm, tropical embrace, making travel enjoyable yet slightly sticky, prompting visitors to seek shade or refreshing beverages while exploring the vibrant surroundings.

September Average Humidity in Seymour

This chart illustrates the average monthly humidity levels in Seymour, 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 Seymour is approximately 64%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%78%76%78%83%83%78%68%64%70%83%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Seymour

In Seymour 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 Seymour.

Maximum UV Index Levels in Seymour for September

The chart shows the monthly maximum UV Index (UVI) for Seymour 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 Seymour typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710101111109753
Data source: Seymour 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 Seymour Compares to Other Months

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

This table compares monthly weather conditions in Seymour, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)80 mm (3.1 inches)81%moderate
February Weather3°C (37°F)94 mm (3.7 inches)78%high
March Weather9°C (48°F)147 mm (5.8 inches)76%high
April Weather12°C (55°F)174 mm (6.9 inches)78%very high
May Weather18°C (65°F)183 mm (7.2 inches)83%very high
June Weather23°C (75°F)102 mm (4.0 inches)83%extreme
July Weather26°C (78°F)85 mm (3.3 inches)78%extreme
August Weather24°C (76°F)109 mm (4.3 inches)68%very high
September Weather22°C (72°F)58 mm (2.3 inches)64%very high
October Weather14°C (58°F)137 mm (5.4 inches)70%high
November Weather7°C (45°F)72 mm (2.8 inches)83%moderate
December Weather5°C (41°F)63 mm (2.5 inches)87%moderate

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