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United StatesThe weather in September in Iowa
It's warm in September in Iowa with an average temperature of 26°C. Temperatures this month range from a low of 22°C to a high of 29°C. At night, you can expect temperatures between 11°C and 17°C.
Looking for great weather? September is a good time to be in Iowa. The temperatures are nice, and there’s not too much rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in September for Iowa, United States. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 36°C in 2023, Iowa reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 10°C in 2018. The extreme nighttime temperatures ranged from a lowest recorded value of 1°C to a highest value of 24°C.
Rainfall amount
In September, there is an average of 74 mm of precipitation, spread over 11 days. The wind speed is around 4 Bft, mostly coming from the South.
Daily weather in September for Iowa
Click on any day in September to get detailed info about the usual weather on that day in Iowa. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| Iowa | New York | |
|---|---|---|
| Average temperature | 26°C | 27°C |
| Max. temperature | 29°C | 31°C |
| Min. temperature | 11°C | -5°C |
| Total precipitation | 74 mm | 57 mm |
| Rainy days | 11 days | 9 days |
Start of September
The month of September starts in Iowa with hot temps, averaging around 27°C during the day and nights around 16°C.
Mid September
By mid-September, daytime temps stay steady at around 27°C, with nights around 15°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of September
By the end of September, the average daytime temperature in Iowa is around 25°C, while nighttime temps are about 14°C. A shower might pop up, but overall, the weather will be dry and sunny.
Find affordable vacations to Iowa
UV index
The UV index is a maximum of 6 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Check out the climate of Iowa for all months and discover the best travel time
The climate in Iowa is based on weather data from . Other places, like New York City, Miami or Los Angeles, might have different weather. You can check out all destinations in Iowa to get the full picture of the climate.
Temperature charts
These charts show the average temperatures in September in Iowa, United States. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Iowa
Temperature in September in Iowa over the years
Precipitation charts
These charts show the average amount of precipitation in September in Iowa, United States. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in September in Iowa
Total precipitation in September in Iowa over the years
Daily UV index in September in Iowa
This chart shows the average daily UV index in September in Iowa, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in September in Iowa
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Average weather in Iowa by month
Click on a month below to see detailed weather info for Iowa. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.