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September Weather in Griggsville, United States

Last updated: June 24, 2025

In Griggsville, United States, the average temperature in September is a pleasant 21°C (71°F). However, temperatures can vary widely, with a minimum of 6°C (44°F) and a scorching maximum of 34°C (94°F). Expect a bit of rain, with an average precipitation of 82 mm (3.2 in) spread over 7 days. The humidity levels are on the higher side, averaging 76%, adding to the overall atmosphere of the region.

September Temperature in Griggsville

In September in Griggsville, the average temperature is 21°C (71°F). Maximum temperatures can reach 34°C (94°F), while minimums can drop as low as 6°C (44°F). This weather makes Griggsville an ideal destination for travelers seeking pleasant temperatures, but also a reminder to prepare for a range of conditions.

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

The chart illustrates September temperature patterns in Griggsville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Griggsville, September typically has an average temperature of 21°C (71°F), with highs reaching up to 34°C (94°F) and lows dropping to around 6°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec293244536675787571574236
Data source: Temperature data for Griggsville 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 Griggsville

In Griggsville in September, the precipitation amount is 82 mm (3.2 in) over the course of 7 days.

September Precipitation Trends in Griggsville

The chart displays monthly precipitation patterns in Griggsville, 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 Griggsville, September typically receives around 82 mm (3.2 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec6663132111161127101106821076347
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Griggsville

In Griggsville in September humidity is 76%. With an average temperature of 21°C (71°F), this humidity feels like a warm, enveloping blanket, making traveling both refreshing and a bit exhausting, as the air clings to your skin and you often find yourself reaching for water to stay hydrated.

September Average Humidity in Griggsville

This chart illustrates the average monthly humidity levels in Griggsville, 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 Griggsville is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%80%80%82%83%81%80%76%76%85%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Griggsville

In Griggsville 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 Griggsville.

Maximum UV Index Levels in Griggsville for September

The chart shows the monthly maximum UV Index (UVI) for Griggsville 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 Griggsville typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910111199643
Data source: Griggsville 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 Griggsville Compares to Other Months

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

This table compares monthly weather conditions in Griggsville, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)66 mm (2.6 inches)82%moderate
February Weather0°C (32°F)63 mm (2.5 inches)80%moderate
March Weather7°C (44°F)132 mm (5.2 inches)80%high
April Weather12°C (53°F)111 mm (4.4 inches)80%very high
May Weather19°C (66°F)161 mm (6.3 inches)82%very high
June Weather24°C (75°F)127 mm (5.0 inches)83%extreme
July Weather26°C (78°F)101 mm (4.0 inches)81%extreme
August Weather24°C (75°F)106 mm (4.2 inches)80%very high
September Weather21°C (71°F)82 mm (3.2 inches)76%very high
October Weather14°C (57°F)107 mm (4.2 inches)76%high
November Weather6°C (42°F)63 mm (2.5 inches)85%moderate
December Weather2°C (36°F)47 mm (1.9 inches)86%moderate

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