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September Weather in Gratton, United States

Last updated: June 24, 2025

In September, the average temperature in Gratton, United States is a pleasant 19°C (67°F), but it can range from a cool 4°C (39°F) to a warm 31°C (87°F). During this time, the region experiences an average precipitation of 97 mm (3.8 in) spread over 11 days, with a humidity level hovering around 68%. So, make sure to pack accordingly!

September Temperature in Gratton

In September in Gratton, the average temperature is 19°C (67°F). Maximum temperatures can reach 31°C (87°F), while minimums can drop to as low as 4°C (39°F). This makes Gratton an ideal destination for travelers seeking mild weather with the opportunity for warm days and cooler nights.

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

The chart illustrates September temperature patterns in Gratton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Gratton, September typically has an average temperature of 19°C (67°F), with highs reaching up to 31°C (87°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec344045536268727066574339
Data source: Temperature data for Gratton 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 Gratton

In Gratton in September, the total precipitation amount is 97 mm (3.8 in) over the course of 11 days.

September Precipitation Trends in Gratton

The chart displays monthly precipitation patterns in Gratton, 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 Gratton, September typically receives around 97 mm (3.8 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec9615112013113813983979712477118
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Gratton

In Gratton in September, humidity is 68%. With an average temperature of 19°C (67°F), this humidity feels like a warm, enveloping blanket, making travel pleasant yet slightly muggy, which can be refreshing while exploring but may require occasional breaks to stay comfortable.

September Average Humidity in Gratton

This chart illustrates the average monthly humidity levels in Gratton, 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 Gratton is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%86%84%83%83%79%66%68%78%89%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Gratton

In Gratton 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 Gratton.

Maximum UV Index Levels in Gratton for September

The chart shows the monthly maximum UV Index (UVI) for Gratton 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 Gratton typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810111111109753
Data source: Gratton 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 Gratton Compares to Other Months

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

This table compares monthly weather conditions in Gratton, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (35°F)96 mm (3.8 inches)87%moderate
February Weather5°C (41°F)151 mm (6.0 inches)87%high
March Weather7°C (45°F)119 mm (4.7 inches)86%very high
April Weather12°C (53°F)131 mm (5.1 inches)84%very high
May Weather17°C (62°F)138 mm (5.4 inches)83%extreme
June Weather20°C (68°F)139 mm (5.5 inches)83%extreme
July Weather22°C (72°F)83 mm (3.3 inches)79%extreme
August Weather21°C (71°F)97 mm (3.8 inches)66%very high
September Weather19°C (67°F)97 mm (3.8 inches)68%very high
October Weather14°C (57°F)124 mm (4.9 inches)78%high
November Weather6°C (43°F)77 mm (3.0 inches)89%moderate
December Weather4°C (39°F)118 mm (4.7 inches)86%moderate

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