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September Weather in Griswold, United States

Last updated: June 24, 2025

In September, the average temperature in Griswold, United States hovers around 20°C (69°F), making it a pleasant time to visit. However, be prepared for a temperature range that can dip as low as 4°C (40°F) and peak at a sweltering 35°C (96°F). Expect about 109 mm (4.3 in) of precipitation spread over 10 days, contributing to an average humidity of 75%. Embrace the climate as you explore what this vibrant destination has to offer!

September Temperature in Griswold

In September in Griswold, the average temperature is 20°C (69°F). Maximum temperatures can reach 35°C (96°F), while minimum temperatures can drop as low as 4°C (40°F). Be prepared for a range of weather conditions when traveling during this month in Griswold.

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

The chart illustrates September temperature patterns in Griswold, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Griswold, September typically has an average temperature of 20°C (69°F), with highs reaching up to 35°C (96°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec242541506375777469523931
Data source: Temperature data for Griswold 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 Griswold

In Griswold in September, the precipitation amount is 109 mm (4.3 in) spread over 10 days.

September Precipitation Trends in Griswold

The chart displays monthly precipitation patterns in Griswold, 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 Griswold, September typically receives around 109 mm (4.3 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec32358960158116671041091343236
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Griswold

In Griswold in September, humidity is 75%. With an average temperature of 20°C (69°F), this humidity feels like a warm, enveloping blanket, making travel a bit muggy and requiring frequent hydration breaks to stay comfortable while exploring.

September Average Humidity in Griswold

This chart illustrates the average monthly humidity levels in Griswold, 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 Griswold is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%80%73%75%78%82%83%81%75%75%82%83%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Griswold

In Griswold 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 Griswold.

Maximum UV Index Levels in Griswold for September

The chart shows the monthly maximum UV Index (UVI) for Griswold 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 Griswold typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356810101098642
Data source: Griswold 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 Griswold Compares to Other Months

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

This table compares monthly weather conditions in Griswold, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (24°F)32 mm (1.3 inches)76%moderate
February Weather-4°C (25°F)34 mm (1.4 inches)80%moderate
March Weather5°C (41°F)89 mm (3.5 inches)73%high
April Weather10°C (50°F)60 mm (2.4 inches)74%very high
May Weather17°C (63°F)158 mm (6.2 inches)78%very high
June Weather24°C (75°F)116 mm (4.6 inches)82%very high
July Weather25°C (78°F)67 mm (2.6 inches)83%very high
August Weather23°C (74°F)104 mm (4.1 inches)80%very high
September Weather20°C (69°F)109 mm (4.3 inches)75%very high
October Weather11°C (53°F)134 mm (5.3 inches)75%high
November Weather4°C (40°F)32 mm (1.3 inches)82%moderate
December Weather-1°C (31°F)36 mm (1.4 inches)83%low

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