Normal weather for Iowa in May
It's pleasantly warm in May in Iowa with an average temperature of 22°C. Temperatures this month range from a low of 16°C to a high of 28°C. At night, you can expect temperatures between 7°C and 16°C.
In May, there is an average of 163 mm of precipitation, spread over 17 days. The wind speed is around 4 Bft, mostly coming from the South.
Iowa in May |
UK | ||
|---|---|---|---|
 Average Temperature |
22°C | 18°C | |
 High Temp |
28°C | 21°C | |
| Low Temp |
16°C | 15°C | |
 Total Precipitation |
163 mm | 46 mm | |
| Rainy Days |
17 days | 8 days | |
Start of May
The month of May starts in Iowa with mild temperatures, averaging around 20°C during the day and nights close to 10°C. You can expect regular precipitation, but there’s also a chance for some sunny days in the first days of the month.
Since temperatures can differ between day and night, it’s a good idea to dress in layers. During the day, a shirt, maybe a light cardigan, and light trousers will do. In the evening and morning, we recommend a warm coat, jumper or cardigan, and long trousers.
Mid-May
By mid-May, the average daytime temperature rises to around 22°C, with nights close to 11°C. The chance of precipitation is high during this period.
Temperatures vary between day and night, so it’s smart to wear layers. A T-shirt, light trousers or skirt, and a light jacket are perfect for daytime. In the evening and morning, we recommend a light coat, jumper or cardigan, and long trousers.
End of May
By the end of May, the average daytime temperature in Iowa will be around 26°C, with nights close to 15°C. There’s regular precipitation, but with a bit of luck, you’ll also get some dry and sunny days.
As it gets cooler in the evening, it’s best to wear layers. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal for the day. For the evening and morning, a shirt, maybe a light cardigan, and light trousers will do.
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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.
Is May a good time to visit Iowa?
After some sun? Then May isn’t the best time to be in Iowa. The temperature is pleasant, but there’s too much chance of rain this month.
Temperature records for Iowa in May
With 37°C, Iowa hit the highest temperature in the last 10 years in May 2018. The lowest daytime temperature in this month was 8°C in 2014. The extreme night temperatures ranged from a low of -1°C to a high of 23°C.
Check out the climate of Iowa for all months and discover the best travel time
The climate of Iowa is based on weather data from . Other spots, like New York City, Miami or Los Angeles, might have different weather. You can check out all destinations in Iowa for a full picture of the climate.
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Daily Temperature in May in Iowa
This chart shows the average daily temperatures, both day and night, for each day in May in Iowa, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in May in Iowa
The chart below shows the average daily precipitation in May for Iowa, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown 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 rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for May, you can expect around 17 days of rain in Iowa.
Daily UV Index in May in Iowa
This chart shows the average daily UV index in May 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 May in Iowa Over the Years
This chart shows the average temperature in May in Iowa, measured in degrees Celsius, over the past years.
Total Precipitation in May in Iowa Over the Years
This chart shows the average precipitation in May in Iowa, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in May for Iowa
Click on a specific day in May for detailed info on the typical weather on that day in Iowa. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in May 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.
