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September Weather in Grant City, United States

Last updated: June 24, 2025

In September, the average temperature in Grant City, United States hovers around 21°C (69°F). Expect a range from a brisk 6°C (43°F) to a warm 33°C (92°F). During this month, precipitation averages 124 mm (4.9 in) over about 8 days, contributing to an average humidity of 73%.

September Temperature in Grant City

In September in Grant City, the average temperature is 21°C (69°F), with maximums reaching 33°C (92°F) and minimums dropping as low as 6°C (43°F). This makes it an ideal time for travelers to enjoy a diverse range of activities, from enjoying warm days to experiencing cooler evenings.

September Weather in Grant City: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Grant City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grant City, September typically has an average temperature of 21°C (69°F), with highs reaching up to 33°C (92°F) and lows dropping to around 6°C (43°F).
JanFebMarAprMayJunJulAugSepOctNovDec262842516476787569544033
Data source: Temperature data for Grant City 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 Grant City

In Grant City in September, the precipitation amount is 124 mm (4.9 in) over a span of 8 days.

September Precipitation Trends in Grant City

The chart displays monthly precipitation patterns in Grant City, 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 Grant City, September typically receives around 124 mm (4.9 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec423399781731371161041241604538
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Grant City

In Grant City in September, humidity is 73%. With an average temperature of 21°C (69°F), this humidity feels like a warm, sticky embrace, making outdoor activities somewhat stifling and travel a bit more challenging, as the air is dense and can leave you feeling fatigued more quickly.

September Average Humidity in Grant City

This chart illustrates the average monthly humidity levels in Grant City, 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 Grant City is approximately 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%80%77%78%77%81%81%77%73%75%85%83%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Grant City

In Grant City in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Grant City.

Maximum UV Index Levels in Grant City for September

The chart shows the monthly maximum UV Index (UVI) for Grant City 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 Grant City typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910111099643
Data source: Grant City 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 Grant City Compares to Other Months

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

This table compares monthly weather conditions in Grant City, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (26°F)42 mm (1.6 inches)78%moderate
February Weather-2°C (28°F)33 mm (1.3 inches)80%moderate
March Weather6°C (43°F)99 mm (3.9 inches)77%high
April Weather11°C (51°F)78 mm (3.1 inches)77%very high
May Weather18°C (64°F)173 mm (6.8 inches)77%very high
June Weather24°C (76°F)137 mm (5.4 inches)81%extreme
July Weather25°C (78°F)116 mm (4.6 inches)81%very high
August Weather24°C (75°F)104 mm (4.1 inches)77%very high
September Weather21°C (69°F)124 mm (4.9 inches)73%very high
October Weather12°C (54°F)160 mm (6.3 inches)75%high
November Weather5°C (41°F)45 mm (1.8 inches)85%moderate
December Weather1°C (33°F)38 mm (1.5 inches)83%moderate

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