Iowa
May
Weather in Iowa for May 2025
Your guide to Iowa weather in May - trends and predictions
In general, the average temperature in Iowa at the beginning of May is 19 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 23.4 °F by the end of May.
The climate of Iowa in May is notably wet, with an average of 13 rainy days.
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18
Dry days
13
Rainy days
0
Snow days
22°/11°
Temperatures
19 km/h
Avg max wind
75 %
Avg humidity
Iowa in May average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  21° | 2  18° | 3  20° | 4  15° | |||
| 5  17° | 6 21° | 7  21° | 8 22° | 9 13° | 10 19° | 11 22° |
| 12 22° | 13 16° | 14 19° | 15 21° | 16 22° | 17 22° | 18  26° |
| 19 21° | 20  19° | 21 22° | 22  22° | 23 24° | 24 23° | 25 22° |
| 26 22° | 27 24° | 28 23° | 29 23° | 30  25° | 31 25° |
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Temperatures trend during May in Iowa
See the weather trend as well as the moving average line
May weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 | Light rain shower | 21° /11° | 19.1 mm | 5 | |
| May 2 | Moderate or heavy rain with thunder | 18° /12° | 32.5 mm | 4 | |
| May 3 | Sunny | 20° /9° | 0 mm | 6 | |
| May 4 | Heavy rain | 15° /9° | 15.1 mm | 4 | |
| May 5 | Overcast | 17° /6° | 0 mm | 4 | |
| May 6 | Patchy rain possible | 21° /8° | 17.7 mm | 5 | |
| May 7 | Fog | 21° /11° | 26.7 mm | 5 | |
| May 8 | Patchy rain possible | 22° /12° | 0.1 mm | 5 | |
| May 9 | Light rain shower | 13° /9° | 1.5 mm | 3 | |
| May 10 | Patchy rain possible | 19° /7° | 0.9 mm | 4 | |
| May 11 | Sunny | 22° /10° | 0 mm | 6 | |
| May 12 | Patchy rain possible | 22° /13° | 1.8 mm | 5 | |
| May 13 | Light rain shower | 16° /14° | 23.9 mm | 4 | |
| May 14 | Patchy rain possible | 19° /10° | 0 mm | 4 | |
| May 15 | Patchy rain possible | 21° /9° | 0.2 mm | 5 | |
| May 16 | Light rain shower | 22° /13° | 1.5 mm | 5 | |
| May 17 | Overcast | 22° /13° | 0 mm | 5 | |
| May 18 | Thundery outbreaks possible | 26° /14° | 0 mm | 6 | |
| May 19 | Light rain shower | 21° /13° | 10 mm | 5 | |
| May 20 | Partly cloudy | 19° /5° | 0 mm | 5 | |
| May 21 | Overcast | 22° /9° | 0 mm | 5 | |
| May 22 | Cloudy | 22° /10° | 0 mm | 6 | |
| May 23 | Partly cloudy | 24° /13° | 0 mm | 7 | |
| May 24 | Partly cloudy | 23° /13° | 9.3 mm | 6 | |
| May 25 | Sunny | 22° /11° | 1.2 mm | 6 | |
| May 26 | Sunny | 22° /12° | 12.3 mm | 6 | |
| May 27 | Sunny | 24° /10° | 0.7 mm | 6 | |
| May 28 | Partly cloudy | 23° /10° | 0.7 mm | 6 | |
| May 29 | Partly cloudy | 23° /10° | 0 mm | 6 | |
| May 30 | Heavy rain at times | 25° /13° | 1 mm | 6 | |
| May 31 | Heavy rain at times | 25° /15° | 0.6 mm | 6 | |
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Important Notice
Our weather forecast for Iowa in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Iowa forecast closer to your planned date for the most up-to-date weather information.
Iowa in May - FAQ
What are the expected maximum and minimum temperatures in Iowa during May?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Iowa during May?
Significant rainfall exceeding 173 mm is expected in Iowa during May, occurring over more than 13 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Iowa during May?
The average wind speed in Iowa during May is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Iowa
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UV exposure in Iowa during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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