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September Weather in Franklin Grove, United States

Last updated: June 24, 2025

In Franklin Grove, United States, the average temperature in September hovers around 20°C (68°F). Expect a range where the minimum can drop to 3°C (37°F), while the maximum can reach up to 34°C (94°F). This month also brings an average precipitation of 114 mm (4.5 in) spread across 10 days, contributing to an overall humidity level of 80%. Stay prepared for a mix of warm days and refreshing showers!

September Temperature in Franklin Grove

In September in Franklin Grove, the average temperature is 20°C (68°F). Maximums can reach 34°C (94°F) and minimums can be as low as 3°C (37°F). This makes it an ideal time for travelers to enjoy a mix of warm sunny days and cooler evenings while exploring the area.

September Weather in Franklin Grove: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Franklin Grove, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Franklin Grove, 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 (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec232639486172757368543832
Data source: Temperature data for Franklin Grove 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 Franklin Grove

In Franklin Grove in September, the precipitation amount is 114 mm (4.5 in) over a period of 10 days.

September Precipitation Trends in Franklin Grove

The chart displays monthly precipitation patterns in Franklin Grove, 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 Franklin Grove, September typically receives around 114 mm (4.5 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec615985115169130100701141205449
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Franklin Grove

In Franklin Grove in September, humidity is 80%. With an average temperature of 20°C (68°F), this humidity feels like traveling through a warm, dense blanket that clings to your skin, making you feel both sticky and lethargic as you explore the sights.

September Average Humidity in Franklin Grove

This chart illustrates the average monthly humidity levels in Franklin Grove, 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 Franklin Grove is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%83%84%85%79%82%80%81%80%82%88%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Franklin Grove

In Franklin Grove 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 Franklin Grove.

Maximum UV Index Levels in Franklin Grove for September

The chart shows the monthly maximum UV Index (UVI) for Franklin Grove 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 Franklin Grove typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35689101098642
Data source: Franklin Grove 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 Franklin Grove Compares to Other Months

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

This table compares monthly weather conditions in Franklin Grove, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (24°F)61 mm (2.4 inches)82%moderate
February Weather-3°C (26°F)59 mm (2.3 inches)83%moderate
March Weather4°C (39°F)85 mm (3.3 inches)84%high
April Weather9°C (49°F)115 mm (4.5 inches)85%very high
May Weather16°C (62°F)169 mm (6.7 inches)79%very high
June Weather22°C (72°F)130 mm (5.1 inches)82%very high
July Weather24°C (76°F)100 mm (4.0 inches)80%very high
August Weather23°C (73°F)70 mm (2.8 inches)81%very high
September Weather20°C (68°F)114 mm (4.5 inches)80%very high
October Weather12°C (54°F)120 mm (4.7 inches)82%high
November Weather3°C (38°F)54 mm (2.1 inches)88%moderate
December Weather0°C (32°F)49 mm (1.9 inches)84%low

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