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September Weather in Nappanee, United States

Last updated: June 24, 2025

In Nappanee, United States, the average temperature in September hovers around 20°C (68°F), with a range that dips to a cool 4°C (39°F) at its lowest and can soar to a warm 33°C (91°F) at its peak. During this time, expect about 77 mm (3.0 in) of rainfall spread over 8 days, leading to an average humidity of 78%.

September Temperature in Nappanee

In September in Nappanee, the average temperature is 20°C (68°F). Maximums can reach 33°C (91°F) and minimums can be as low as 4°C (39°F). This makes Nappanee a great destination for travelers looking to enjoy a mild climate with a variety of temperature experiences.

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

The chart illustrates September temperature patterns in Nappanee, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Nappanee, September typically has an average temperature of 20°C (68°F), with highs reaching up to 33°C (91°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec272939496172757267554034
Data source: Temperature data for Nappanee 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 Nappanee

In Nappanee in September, the precipitation amount is 77 mm (3.0 in) distributed over 8 days.

September Precipitation Trends in Nappanee

The chart displays monthly precipitation patterns in Nappanee, 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 Nappanee, September typically receives around 77 mm (3.0 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec7275102101141121120106771218061
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Nappanee

In Nappanee 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 Nappanee

This chart illustrates the average monthly humidity levels in Nappanee, 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 Nappanee is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%85%86%87%81%82%81%79%78%81%89%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Nappanee

In Nappanee 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 Nappanee.

Maximum UV Index Levels in Nappanee for September

The chart shows the monthly maximum UV Index (UVI) for Nappanee 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 Nappanee typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35699101098643
Data source: Nappanee 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 Nappanee Compares to Other Months

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

This table compares monthly weather conditions in Nappanee, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (28°F)71 mm (2.8 inches)85%moderate
February Weather-2°C (29°F)75 mm (2.9 inches)85%moderate
March Weather4°C (40°F)102 mm (4.0 inches)86%high
April Weather9°C (49°F)101 mm (4.0 inches)87%very high
May Weather16°C (62°F)141 mm (5.6 inches)81%very high
June Weather22°C (72°F)121 mm (4.8 inches)82%very high
July Weather24°C (75°F)120 mm (4.7 inches)81%very high
August Weather22°C (73°F)106 mm (4.2 inches)79%very high
September Weather20°C (68°F)77 mm (3.0 inches)78%very high
October Weather13°C (55°F)121 mm (4.8 inches)81%high
November Weather4°C (40°F)80 mm (3.1 inches)89%moderate
December Weather1°C (34°F)61 mm (2.4 inches)86%moderate

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