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September Weather in Geistown, United States

Last updated: June 24, 2025

In September, the average temperature in Geistown, United States is a pleasant 18°C (65°F). Expect a range where the minimum can dip to 1°C (34°F) and the maximum may reach up to 31°C (88°F). The region experiences an average precipitation of 127 mm (5.0 in) over 11 days, contributing to an average humidity of 67%.

September Temperature in Geistown

In September in Geistown, the average temperature is 18°C (65°F). Maximums can reach 31°C (88°F), while minimums can drop as low as 1°C (34°F). Be prepared for a wide range of temperatures for your travels!

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

The chart illustrates September temperature patterns in Geistown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Geistown, September typically has an average temperature of 18°C (65°F), with highs reaching up to 31°C (88°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec283239495967737165553934
Data source: Temperature data for Geistown 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 Geistown

In Geistown in September, the precipitation amount is 127 mm (5.0 in), occurring over 11 days.

September Precipitation Trends in Geistown

The chart displays monthly precipitation patterns in Geistown, 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 Geistown, September typically receives around 127 mm (5.0 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec801181031211411271169712711180104
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Geistown

In Geistown in September humidity is 67%. With an average temperature of 18°C (65°F), this humidity feels like a mild blanket wrapping around you, making outdoor activities feel pleasantly refreshing, yet you may find yourself reaching for a drink more often to stay hydrated while exploring the sights.

September Average Humidity in Geistown

This chart illustrates the average monthly humidity levels in Geistown, 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 Geistown is approximately 67%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%90%89%88%80%79%74%64%67%81%89%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Geistown

In Geistown 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 Geistown.

Maximum UV Index Levels in Geistown for September

The chart shows the monthly maximum UV Index (UVI) for Geistown 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 Geistown typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101010108643
Data source: Geistown 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 Geistown Compares to Other Months

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

This table compares monthly weather conditions in Geistown, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)80 mm (3.1 inches)89%moderate
February Weather0°C (33°F)118 mm (4.6 inches)90%moderate
March Weather4°C (39°F)103 mm (4.1 inches)89%high
April Weather9°C (49°F)121 mm (4.8 inches)88%very high
May Weather15°C (60°F)141 mm (5.6 inches)80%very high
June Weather20°C (68°F)127 mm (5.0 inches)79%very high
July Weather23°C (73°F)116 mm (4.6 inches)74%very high
August Weather22°C (71°F)97 mm (3.8 inches)64%very high
September Weather18°C (65°F)127 mm (5.0 inches)67%very high
October Weather13°C (55°F)111 mm (4.4 inches)81%high
November Weather4°C (40°F)80 mm (3.2 inches)89%moderate
December Weather1°C (34°F)104 mm (4.1 inches)88%moderate

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