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Weather in Iowa for May 2027

Your guide to Iowa weather in May - trends and predictions

    Temperatures

  • In general, the average temperature in Iowa at the beginning of May is 18.4 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 23.6 °C by the end of May.

    • Rain 🌧️

  • Iowa experiences moderate rainfall in May, with an average of 10 rainy days and a total precipitation of 142.7 mm.

    • More

  • Is May a good time to visit Iowa? check out the best time to travel to Iowa page.

  • ✨ Is May a good time to visit Iowa? – Ask the AI Weatherman

Average dry days
21
Dry days
Average rainy days
10
Rainy days
Average snowy days
0
Snow days
Average temperatures
21°/11°
Temperatures
Average wind speed
20 km/h
Avg max wind
Average humidity
71 %
Avg humidity

Iowa Weather May

Move between months or click on a day
April
June
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Light rain
17°
2
Moderate or heavy rain with thunder
16°
3
Sunny
20°
4
Heavy rain
20°
5
Overcast
17°
6
Light rain
18°
7
Moderate rain
21°
8
Patchy rain possible
20°
9
Sunny
19°
10
Patchy rain possible
23°
11
Sunny
24°
12
Patchy rain possible
24°
13
Light rain
21°
14
Patchy rain possible
24°
15
Patchy rain possible
26°
16
Light rain
24°
17
Light rain
23°
18
Thundery outbreaks possible
24°
19
Light rain
18°
20
Heavy rain
16°
21
Overcast
17°
22
Cloudy
20°
23
Partly cloudy
22°
24
Light rain
22°
25
Light rain
21°
26
Light rain
23°
27
Sunny
23°
28
Partly cloudy
22°
29
Partly cloudy
22°
30
Patchy rain possible
26°
31
Patchy rain possible
28°

What’s the Weather Like in Iowa This May?

Discover the average temperatures and weather trends across Iowa’s cities this May.
CloudyDes Moines21 °C / 11 °CCloudyWaterloo21 °C / 10 °CPatchy rain possibleCedar Rapids21 °C / 10 °CPatchy rain possibleIowa City21 °C / 10 °CCloudyFairfield22 °C / 11 °CCloudySioux City22 °C / 11 °CMore Locations

Temperatures trend during May in Iowa

See the weather trend as well as the moving average line

May weather in Iowa day by day

Click on a date for more information
April June
Date Weather Temperatures Rain UV More
May 1 Light rain
Light rain
 17° /9° 6.4 mm 6
May 2 Moderate or heavy rain with thunder
Moderate or heavy rain with thunder
 16° /7° 12.4 mm 5
May 3 Sunny
Sunny
 20° /7° 0.2 mm 6
May 4 Heavy rain
Heavy rain
 20° /8° 6 mm 6
May 5 Overcast
Overcast
 17° /8° 0.6 mm 6
May 6 Light rain
Light rain
 18° /6° 5.9 mm 5
May 7 Moderate rain
Moderate rain
 21° /9° 11.2 mm 6
May 8 Patchy rain possible
Patchy rain possible
 20° /10° 0.6 mm 6
May 9 Sunny
Sunny
 19° /8° 0.5 mm 6
May 10 Patchy rain possible
Patchy rain possible
 23° /7° 0.3 mm 7
May 11 Sunny
Sunny
 24° /9° 0 mm 7
May 12 Patchy rain possible
Patchy rain possible
 24° /13° 0.8 mm 7
May 13 Light rain
Light rain
 21° /13° 8 mm 7
May 14 Patchy rain possible
Patchy rain possible
 24° /11° 0 mm 7
May 15 Patchy rain possible
Patchy rain possible
 26° /14° 0.7 mm 5
May 16 Light rain
Light rain
 24° /14° 8.7 mm 5
May 17 Light rain
Light rain
 23° /13° 4.9 mm 5
May 18 Thundery outbreaks possible
Thundery outbreaks possible
 24° /12° 9.1 mm 5
May 19 Light rain
Light rain
 18° /11° 9.2 mm 5
May 20 Heavy rain
Heavy rain
 16° /6° 37.1 mm 6
May 21 Overcast
Overcast
 17° /8° 0 mm 4
May 22 Cloudy
Cloudy
 20° /10° 0.2 mm 6
May 23 Partly cloudy
Partly cloudy
 22° /11° 0.3 mm 5
May 24 Light rain
Light rain
 22° /12° 4.6 mm 6
May 25 Light rain
Light rain
 21° /12° 6.6 mm 6
May 26 Light rain
Light rain
 23° /12° 6.2 mm 6
May 27 Sunny
Sunny
 23° /12° 0.3 mm 7
May 28 Partly cloudy
Partly cloudy
 22° /13° 0.3 mm 7
May 29 Partly cloudy
Partly cloudy
 22° /12° 0 mm 7
May 30 Patchy rain possible
Patchy rain possible
 26° /14° 0.9 mm 7
May 31 Patchy rain possible
Patchy rain possible
 28° /15° 0.7 mm 7
Next
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.
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Iowa in May - FAQ

What are the expected maximum and minimum temperatures in Iowa during May?
Enjoy moderate daytime temperatures of up to 21° 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 142.7 mm is expected in Iowa during May, occurring over more than 10 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 20 km/h, suggesting breezy to windy conditions, depending on your activities.

May rainfall patterns in Iowa

Explore the daily rainfall trends and prepare for Iowas May weather 💧
Typically, Iowa has 10 rainy days in May with a total of 142.7 mm of rainfall.

UV exposure in Iowa during May

Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
Counties in Iowa
Select a county for an accurate weather forecast
Black Hawk CountyJefferson CountyJohnson CountyLinn CountyPolk CountyWoodbury County
Top locations in Iowa
Select a location for an accurate weather forecast
Cedar RapidsDes MoinesFairfieldIowa CitySioux CityWaterloo
More Locations
Quick links
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