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United StatesThe weather in September in Des Moines
It's warm in September in Des Moines with an average temperature of 23°C. Temperatures this month range from a low of 18°C to a high of 27°C. At night, you can expect temperatures between 12°C and 15°C.
Looking for great weather? September is a good time to be in Des Moines. 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 Des Moines, Washington. 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 33°C in 2020, Des Moines reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 12°C in 2019. The extreme nighttime temperatures ranged from a lowest recorded value of 6°C to a highest value of 20°C.
Rainfall amount
In September, there is an average of 91 mm of precipitation, spread over 11 days. The wind speed is around 3 Bft, mostly coming from the Southwest.
Daily weather in September for Des Moines
Click on any day in September to get detailed info about the usual weather on that day in Des Moines. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| Des Moines | New York | |
|---|---|---|
| Average temperature | 23°C | 27°C |
| Max. temperature | 27°C | 31°C |
| Min. temperature | 12°C | -5°C |
| Total precipitation | 91 mm | 57 mm |
| Rainy days | 11 days | 9 days |
Start of September
The month of September starts in Des Moines with warm temps, averaging around 25°C during the day and nights around 15°C.
Mid September
By mid-September, daytime temps drop to around 23°C, with nights around 14°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 Des Moines is around 21°C, while nighttime temps are about 14°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
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UV index
The UV index is a maximum of 7 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 Des Moines for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in September in Des Moines, Washington. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Des Moines
Temperature in September in Des Moines over the years
Precipitation charts
These charts show the average amount of precipitation in September in Des Moines, Washington. 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 Des Moines
Total precipitation in September in Des Moines over the years
Daily UV index in September in Des Moines
This chart shows the average daily UV index in September in Des Moines, 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 Des Moines
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Average weather in Des Moines by month
Click on a month below to see detailed weather info for Des Moines. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.