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September Weather in Atchison, United States

Last updated: June 24, 2025

In September, the average temperature in Atchison, United States is a pleasant 22°C (72°F). Expect minimum temperatures to dip to 7°C (44°F) and highs soaring up to 34°C (93°F). With an average humidity of 71% and precipitation reaching 81 mm (3.2 in) over 8 days, you'll want to prepare for a mix of sunny and wet weather during your stay!

September Temperature in Atchison

In September in Atchison, the average temperature is 22°C (72°F), with maximums reaching up to 34°C (93°F) and minimums dropping as low as 7°C (44°F). This pleasant range in temperatures makes Atchison an ideal destination for travelers seeking a comfortable climate.

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

The chart illustrates September temperature patterns in Atchison, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Atchison, September typically has an average temperature of 22°C (72°F), with highs reaching up to 34°C (93°F) and lows dropping to around 7°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec303145536577797671564336
Data source: Temperature data for Atchison 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 Atchison

In Atchison in September, the precipitation amount is 81 mm (3.2 in) over the course of 8 days.

September Precipitation Trends in Atchison

The chart displays monthly precipitation patterns in Atchison, 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 Atchison, September typically receives around 81 mm (3.2 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec4533918020611781115811234535
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Atchison

In Atchison in September humidity is 71%. With an average temperature of 22°C (72°F), this humidity feels like the air is thick and slightly stifling, making outdoor activities require frequent breaks to stay hydrated and cool.

September Average Humidity in Atchison

This chart illustrates the average monthly humidity levels in Atchison, 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 Atchison is approximately 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%78%70%73%82%82%81%78%71%71%81%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Atchison

In Atchison 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 Atchison.

Maximum UV Index Levels in Atchison for September

The chart shows the monthly maximum UV Index (UVI) for Atchison 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 Atchison typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111109643
Data source: Atchison 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 Atchison Compares to Other Months

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

This table compares monthly weather conditions in Atchison, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)45 mm (1.8 inches)76%moderate
February Weather0°C (32°F)33 mm (1.3 inches)77%moderate
March Weather7°C (46°F)91 mm (3.6 inches)70%high
April Weather12°C (54°F)80 mm (3.1 inches)73%very high
May Weather19°C (66°F)206 mm (8.1 inches)82%very high
June Weather25°C (77°F)117 mm (4.6 inches)82%extreme
July Weather26°C (80°F)81 mm (3.2 inches)81%extreme
August Weather25°C (77°F)115 mm (4.5 inches)78%very high
September Weather22°C (72°F)81 mm (3.2 inches)71%very high
October Weather13°C (56°F)123 mm (4.8 inches)71%high
November Weather6°C (43°F)45 mm (1.8 inches)81%moderate
December Weather2°C (37°F)35 mm (1.4 inches)84%moderate

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