September Weather in Seymour, United States

Last updated: June 24, 2025

In Seymour, United States, the average temperature in September hovers around 25°C (78°F), making it quite pleasant. However, temperatures can vary significantly, dropping to a minimum of 8°C (47°F) and soaring to a maximum of 40°C (104°F). During this month, expect approximately 105 mm (4.1 in) of precipitation spread over 6 days, and enjoy a comfortable average humidity of 64%.

September Temperature in Seymour

In September in Seymour, the average temperature is 25°C (78°F). Maximums can reach 40°C (104°F), and minimums can drop as low as 8°C (47°F). Be prepared for a range of temperatures, making it essential to pack versatile clothing for your travels.

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 25°C (78°F), with highs reaching up to 40°C (104°F) and lows dropping to around 8°C (47°F).

Data source: Temperature data for Seymour generated using information from the Copernicus Climate Change Service.

September Precipitation in Seymour

In Seymour in September, the precipitation amount reaches 105 mm (4.1 in) over a span 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 105 mm (4.1 inches) of precipitation spread over approximately 6 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Seymour

In Seymour in September, humidity is 64%. With an average temperature of 25°C (78°F), this humidity feels like a warm blanket wrapping around you, making it feel much warmer than the actual temperature, which can be a bit stifling for traveling but also adds a lush, tropical feel to the atmosphere.

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.

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 reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more 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 10, which falls under the very high exposure category.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (44°F)	34 mm (1.3 inches)	77%	moderate
February Weather	8°C (46°F)	32 mm (1.3 inches)	76%	high
March Weather	15°C (59°F)	68 mm (2.7 inches)	74%	very high
April Weather	18°C (65°F)	72 mm (2.8 inches)	75%	very high
May Weather	24°C (75°F)	118 mm (4.7 inches)	80%	extreme
June Weather	28°C (83°F)	49 mm (1.9 inches)	80%	extreme
July Weather	30°C (87°F)	18 mm (0.7 inches)	75%	extreme
August Weather	29°C (85°F)	50 mm (2.0 inches)	67%	extreme
September Weather	25°C (78°F)	105 mm (4.1 inches)	64%	very high
October Weather	19°C (66°F)	74 mm (2.9 inches)	70%	very high
November Weather	12°C (55°F)	30 mm (1.2 inches)	82%	high
December Weather	9°C (49°F)	33 mm (1.3 inches)	85%	moderate