United StatesAverage weather for Iowa in May
It's warm in May in Iowa with an average temperature of 29°C. Temperatures this month range from a low of 28°C to a high of 31°C. At night, you can expect temperatures between 17°C and 23°C.
Start of May
The month of May starts in Iowa with hot temps, averaging around 29°C during the day and nights around 20°C. There are plenty of days with a good chance of precipitation.
With the temperature difference between day and night, it’s smart to wear layers.
Mid May
By mid-May, daytime temps rise to around 30°C, with nights around 21°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
End of May
By the end of May, the average daytime temperature in Iowa is around 31°C, while nighttime temps are about 22°C. There’s a significant chance of many days with precipitation.
In May, there is an average of 275 mm of precipitation, spread over 9 days. The wind speed is around 4 Bft, mostly coming from the Southeast.
Iowa in May |
New York | ||
|---|---|---|---|
 Average temperature |
29°C | 22°C | |
 Max. temperature |
31°C | 28°C | |
| Min. temperature |
28°C | -5°C | |
 Total precipitation |
275 mm | 105 mm | |
| Rainy days |
9 days | 14 days | |
April
UV index
The UV index is a maximum of 9 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is May a good time to visit Iowa?
Looking for sun? May isn’t a good month to be in Iowa. The temperature is nice, but there’s too much chance of rain.
The hurricane season in Iowa runs from June to November.
Temperature records
With 35°C in 2018, Iowa reached the highest temperature in May over the past 10 years. The lowest daytime temperature in this month was 18°C in 2020. The extreme nighttime temperatures ranged from a lowest recorded value of 6°C to a highest value of 26°C.
Check out the climate of Iowa for all months and discover the best travel time
Daily Temperature in May in Iowa
This chart shows the average daily high and low temperatures in May 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 May in Iowa
The chart below shows the average daily precipitation in May 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 May, you can expect about 9 days of precipitation 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 few years.
Total precipitation in May in Iowa over the years
This chart shows the average precipitation in May in Iowa, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in May for Iowa
Click on any day in May 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 May in Iowa
Have you been to Iowa in May?
Share your weather experience in May in Iowa.
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.
