Normal weather for Iowa in September
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.
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.
Iowa in September |
New York | ||
|---|---|---|---|
 Average Temperature |
26°C | 27°C | |
 High Temp |
29°C | 31°C | |
| Low Temp |
22°C | 21°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. You can expect regular precipitation, but there will also be some sunny days in the early part of the month.
With the temperature difference between day and night, it’s smart to wear layers. For the daytime, light clothing like shorts or a dress, and a hat and sunglasses are perfect. For the evening and morning, a shirt, maybe a light sweater, and thin pants are recommended.
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.
Since it cools down at night, it’s a good idea to wear layers. For the daytime, light clothing like shorts or a dress, and a hat and sunglasses are perfect. For the evening and morning, a shirt, maybe a light sweater, and thin pants are recommended.
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.
Because temperatures drop in the evening, wearing layers is recommended. A T-shirt, light pants or skirt, and a light jacket are great for the day. In the evening and morning, choose a light jacket, sweater or hoodie, and long pants.
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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.
Is September a good time to visit Iowa?
Looking for great weather? September is a good time to be in Iowa. The temperatures are nice, and there’s not too much rain.
Temperature records for Iowa in September
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.
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Daily Temperature in September in Iowa
This chart shows the average daily high and low temperatures in September for Iowa, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in September in Iowa
The chart below shows the average daily precipitation in September for Iowa, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 11 days of precipitation in Iowa.
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.
Temperature in September in Iowa Over the Years
This chart shows the average temperature in September in Iowa, measured in degrees Celsius, over the past few years.
Total Precipitation in September in Iowa Over the Years
This chart shows the average precipitation in September in Iowa, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily Climate 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.
Weather experiences in September in Iowa
Have you been to Iowa in September?
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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.
