Last updated: June 24, 2025
In September, the average temperature in Ames, United States is a pleasant 20°C (68°F), with a minimum dipping to 3°C (38°F) and a maximum soaring to 34°C (93°F). Expect an average of 121 mm (4.8 in) of precipitation over 10 days, accompanied by a humidity level of 73%. Whether you're exploring or relaxing, be prepared for a mix of conditions!
In September in Ames, the average temperature is 20°C (68°F). Maximums can reach 34°C (93°F), and minimums can be as low as 3°C (38°F). Be prepared for a range of weather conditions during your travels!
In Ames in September, the precipitation amount is 121 mm (4.8 in) spread over a period of 10 days.
In Ames in September, humidity is 73%. With an average temperature of 20°C (68°F), this humidity feels like a warm embrace, making outdoor activities somewhat sticky, yet the atmosphere remains pleasant for leisurely strolls and sightseeing.
In Ames 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 Ames.
UV Risk Categories
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.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | -6°C (21°F) | 36 mm (1.4 inches) | 78% | moderate |
February Weather | -6°C (22°F) | 42 mm (1.7 inches) | 80% | moderate |
March Weather | 3°C (39°F) | 77 mm (3.0 inches) | 77% | high |
April Weather | 9°C (49°F) | 79 mm (3.1 inches) | 77% | very high |
May Weather | 17°C (62°F) | 158 mm (6.2 inches) | 77% | very high |
June Weather | 23°C (74°F) | 102 mm (4.0 inches) | 81% | extreme |
July Weather | 25°C (77°F) | 78 mm (3.1 inches) | 81% | very high |
August Weather | 23°C (73°F) | 72 mm (2.8 inches) | 77% | very high |
September Weather | 20°C (68°F) | 121 mm (4.8 inches) | 73% | very high |
October Weather | 11°C (52°F) | 130 mm (5.1 inches) | 75% | high |
November Weather | 3°C (38°F) | 41 mm (1.6 inches) | 85% | moderate |
December Weather | -1°C (30°F) | 36 mm (1.4 inches) | 83% | moderate |