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September Weather in Otterbein, United States

Last updated: June 24, 2025

In September, the average temperature in Otterbein, United States hovers around 21°C (70°F), offering a pleasant climate. While you might enjoy temperatures as low as 5°C (42°F), be prepared for the occasional heat wave, peaking at 34°C (93°F). Expect about 65 mm (2.6 in) of rainfall over 9 days, contributing to an average humidity of 78% that adds a touch of warmth to the air. Enjoy the diverse weather of this vibrant locale!

September Temperature in Otterbein

In September in Otterbein, the average temperature is 21°C (70°F), with maximums reaching 34°C (93°F) and minimums dropping as low as 5°C (42°F). This range makes Otterbein a perfect destination for travelers seeking both warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Otterbein, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Otterbein, September typically has an average temperature of 21°C (70°F), with highs reaching up to 34°C (93°F) and lows dropping to around 5°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec283142516473767469574135
Data source: Temperature data for Otterbein 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 Otterbein

In Otterbein in September, the precipitation amount is 65 mm (2.6 in) over the course of 9 days.

September Precipitation Trends in Otterbein

The chart displays monthly precipitation patterns in Otterbein, 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 Otterbein, September typically receives around 65 mm (2.6 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec74771069715210099101651127562
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Otterbein

In Otterbein in September, humidity is 78%. With an average temperature of 21°C (70°F), this humidity feels like a warm, enveloping blanket that can leave travelers feeling sticky and slightly fatigued, making it important to stay hydrated and take frequent breaks from outdoor activities.

September Average Humidity in Otterbein

This chart illustrates the average monthly humidity levels in Otterbein, 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 Otterbein 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 Otterbein

In Otterbein 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 Otterbein.

Maximum UV Index Levels in Otterbein for September

The chart shows the monthly maximum UV Index (UVI) for Otterbein 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 Otterbein typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910111098642
Data source: Otterbein 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 Otterbein Compares to Other Months

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

This table compares monthly weather conditions in Otterbein, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)74 mm (2.9 inches)85%moderate
February Weather-1°C (31°F)77 mm (3.0 inches)85%moderate
March Weather5°C (42°F)106 mm (4.2 inches)86%high
April Weather11°C (52°F)97 mm (3.8 inches)87%very high
May Weather18°C (64°F)152 mm (6.0 inches)81%very high
June Weather23°C (74°F)100 mm (3.9 inches)82%extreme
July Weather25°C (77°F)99 mm (3.9 inches)81%very high
August Weather23°C (74°F)101 mm (4.0 inches)79%very high
September Weather21°C (70°F)65 mm (2.6 inches)78%very high
October Weather14°C (57°F)112 mm (4.4 inches)81%high
November Weather5°C (41°F)75 mm (3.0 inches)89%moderate
December Weather2°C (35°F)62 mm (2.4 inches)86%low

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