September Weather in Tiffin, United States

Last updated: June 24, 2025

In Tiffin, United States, the average temperature in September hovers around 20°C (68°F), bringing a mild and pleasant climate. Expect a minimum of 3°C (38°F) and a maximum of 34°C (94°F), offering a diverse range of experiences. However, be prepared for some rain, as the area receives an average precipitation of 127 mm (5.0 in) across 9 days. With an average humidity of 78%, the atmosphere remains comfortably humid, perfect for enjoying the local scenery.

September Temperature in Tiffin

In September in Tiffin, the average temperature is 20°C (68°F). Maximum temperatures can reach 34°C (94°F), while minimums can dip as low as 3°C (38°F). Overall, it's an ideal time for travelers to enjoy a mix of warm days and cool nights in Tiffin.

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

The chart illustrates September temperature patterns in Tiffin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tiffin, September typically has an average temperature of 20°C (68°F), with highs reaching up to 34°C (94°F) and lows dropping to around 3°C (38°F).

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

September Precipitation in Tiffin

In Tiffin in September, the precipitation amount is 127 mm (5.0 in) over a span of 9 days.

September Precipitation Trends in Tiffin

The chart displays monthly precipitation patterns in Tiffin, 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 Tiffin, September typically receives around 127 mm (5.0 inches) of precipitation spread over approximately 9 days.

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

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Millimeters (mm) Inches (in)

September Humidity in Tiffin

In Tiffin in September humidity is 78%. With an average temperature of 20°C (68°F), this humidity feels like a warm, enveloping blanket that makes exploring the sights a bit sticky, so travelers should stay hydrated and take frequent breaks in the shade.

September Average Humidity in Tiffin

This chart illustrates the average monthly humidity levels in Tiffin, 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 Tiffin is approximately 78%, 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 Tiffin

In Tiffin in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Tiffin.

Maximum UV Index Levels in Tiffin for September

The chart shows the monthly maximum UV Index (UVI) for Tiffin 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 Tiffin typically reaches 8, which falls under the very high exposure category.

Data source: Tiffin 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 Tiffin Compares to Other Months

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

This table compares monthly weather conditions in Tiffin, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-6°C (22°F)	48 mm (1.9 inches)	81%	moderate
February Weather	-5°C (24°F)	56 mm (2.2 inches)	81%	moderate
March Weather	4°C (39°F)	79 mm (3.1 inches)	81%	high
April Weather	9°C (49°F)	83 mm (3.3 inches)	82%	very high
May Weather	17°C (62°F)	148 mm (5.8 inches)	78%	very high
June Weather	23°C (74°F)	129 mm (5.1 inches)	81%	extreme
July Weather	25°C (77°F)	82 mm (3.2 inches)	79%	very high
August Weather	23°C (73°F)	71 mm (2.8 inches)	77%	very high
September Weather	20°C (68°F)	127 mm (5.0 inches)	78%	very high
October Weather	12°C (53°F)	133 mm (5.2 inches)	78%	high
November Weather	3°C (38°F)	51 mm (2.0 inches)	87%	moderate
December Weather	-1°C (31°F)	45 mm (1.8 inches)	84%	moderate