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September Weather in Plattsmouth, United States

Last updated: June 24, 2025

In September, the average temperature in Plattsmouth, United States is a pleasant 21°C (70°F). Expect the mercury to dip as low as 5°C (42°F) and soar up to 36°C (97°F), offering a wide range of conditions. Be prepared for some rain, as the area experiences about 89 mm (3.5 in) of precipitation over 9 days. With an average humidity of 75%, you might want to keep your cool!

September Temperature in Plattsmouth

In September in Plattsmouth, the average temperature is 21°C (70°F). Maximum temperatures can reach 36°C (97°F), while the minimum can drop as low as 5°C (42°F). Travelers should be prepared for a wide range of weather conditions, ensuring they pack both warm and light clothing.

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

The chart illustrates September temperature patterns in Plattsmouth, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Plattsmouth, September typically has an average temperature of 21°C (70°F), with highs reaching up to 36°C (97°F) and lows dropping to around 5°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec252642516376787570534132
Data source: Temperature data for Plattsmouth 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 Plattsmouth

In Plattsmouth in September, the precipitation amount is 89 mm (3.5 in) during a span of 9 days.

September Precipitation Trends in Plattsmouth

The chart displays monthly precipitation patterns in Plattsmouth, 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 Plattsmouth, September typically receives around 89 mm (3.5 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec333299551451289095901423035
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Plattsmouth

In Plattsmouth in September, humidity is 75%. With an average temperature of 21°C (70°F), this humidity feels like a warm, enveloping blanket that makes exploring the area feel slightly sticky, requiring travelers to stay hydrated and take occasional breaks in the shade to fully enjoy their adventures.

September Average Humidity in Plattsmouth

This chart illustrates the average monthly humidity levels in Plattsmouth, 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 Plattsmouth 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 Plattsmouth

In Plattsmouth 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 Plattsmouth.

Maximum UV Index Levels in Plattsmouth for September

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

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

This table compares monthly weather conditions in Plattsmouth, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (26°F)33 mm (1.3 inches)76%moderate
February Weather-3°C (26°F)31 mm (1.2 inches)80%moderate
March Weather5°C (42°F)99 mm (3.9 inches)73%high
April Weather10°C (51°F)55 mm (2.1 inches)74%very high
May Weather17°C (64°F)145 mm (5.7 inches)78%very high
June Weather25°C (76°F)128 mm (5.0 inches)82%very high
July Weather26°C (78°F)90 mm (3.5 inches)83%very high
August Weather24°C (75°F)95 mm (3.7 inches)80%very high
September Weather21°C (70°F)89 mm (3.5 inches)75%very high
October Weather12°C (53°F)142 mm (5.6 inches)75%high
November Weather5°C (41°F)30 mm (1.2 inches)82%moderate
December Weather0°C (32°F)35 mm (1.4 inches)83%low

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