nomadseason

September Weather in Ames, United States

Last updated: June 24, 2025

In September, the average temperature in Ames, United States is a pleasant 26°C (80°F), making it an ideal time to enjoy outdoor activities. However, be prepared for a range of temperatures, with a minimum of 10°C (49°F) and a sizzling maximum of 39°C (102°F). During this month, expect about 86 mm (3.4 in) of precipitation spread over 7 days, contributing to an average humidity level of 66%.

September Temperature in Ames

In September in Ames, the average temperature is 26°C (80°F), with maximums reaching up to 39°C (102°F) and minimums dropping as low as 10°C (49°F). This range of temperatures makes it essential for travelers to prepare for both warm and cool conditions.

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

The chart illustrates September temperature patterns in Ames, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ames, September typically has an average temperature of 26°C (80°F), with highs reaching up to 39°C (102°F) and lows dropping to around 10°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec495162677582868679695853
Data source: Temperature data for Ames generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Ames

In Ames in September, the total precipitation amount is 86 mm (3.4 in) over a span of 7 days.

September Precipitation Trends in Ames

The chart displays monthly precipitation patterns in Ames, 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 Ames, September typically receives around 86 mm (3.4 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec49697889171745179861294150
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Ames

In Ames in September humidity is 66%. With an average temperature of 26°C (80°F), this humidity feels like a warm, sticky embrace, making travel a bit challenging as you might find yourself needing frequent breaks to cool down and stay hydrated.

September Average Humidity in Ames

This chart illustrates the average monthly humidity levels in Ames, 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 Ames is approximately 66%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%78%77%78%82%78%69%63%66%73%84%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Ames

In Ames in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Ames.

Maximum UV Index Levels in Ames for September

The chart shows the monthly maximum UV Index (UVI) for Ames 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 Ames typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec478101112121110864
Data source: Ames 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 Ames Compares to Other Months

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

This table compares monthly weather conditions in Ames, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (49°F)49 mm (1.9 inches)78%moderate
February Weather10°C (51°F)69 mm (2.7 inches)78%high
March Weather17°C (62°F)78 mm (3.1 inches)77%very high
April Weather19°C (67°F)89 mm (3.5 inches)78%very high
May Weather24°C (75°F)171 mm (6.7 inches)82%extreme
June Weather28°C (82°F)74 mm (2.9 inches)78%extreme
July Weather30°C (86°F)51 mm (2.0 inches)69%extreme
August Weather30°C (86°F)79 mm (3.1 inches)63%extreme
September Weather26°C (80°F)86 mm (3.4 inches)66%very high
October Weather21°C (69°F)129 mm (5.1 inches)73%very high
November Weather14°C (58°F)41 mm (1.6 inches)84%high
December Weather12°C (53°F)50 mm (2.0 inches)87%moderate

Compare Ames's Climate with Cities Worldwide