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Iowa

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Iowa Weather and climate

Data source：Meteostat
Update date：2025-09

Iowa year round climate
  • Spring (March–May): Average 3.5–17.6°C, climate gradually transitions from cold to warm, rainfall gradually increases, with the most rainfall in May. Common activities: Outdoor walks, flower viewing. Suggested clothing: Spring jacket, long-sleeved shirts, comfortable shoes.
  • Summer (June–August): Average 23.0–23.3°C, warm and humid climate, relatively high rainfall. Common activities: Camping, water activities. Suggested clothing: Light and breathable clothing, short-sleeved shirts, shorts.
  • Autumn (September–November): Average 19.2–4.2°C, climate transitions from warm to cool, rainfall decreases. Common activities: Maple leaf viewing, outdoor picnics. Suggested clothing: Light jacket, long-sleeved shirts, comfortable shoes.
  • Winter (December–February): Average -6.3–-1.5°C, cold and dry climate, snowfall possible. Common activities: Skiing, indoor activities. Suggested clothing: Heavy warm clothing, down jackets, scarves, gloves, hats.
Iowa climatological average

Annual average temperature: approx. 10.5°C / Annual rainfall: approx. 1132 mm / Summer humidity: 60%–70% / Rainiest month: May

Iowa monthly average temperature and precipitation
Month
Air temperature (°C)
Precipitation (mm)
January
-6.3°C
37.7
February
-1.6°C
25.3
March
3.5°C
98.5
April
9.7°C
128.8
May
17.6°C
163.6
June
23°C
163.3
July
23.3°C
145.2
August
22.8°C
118.8
September
19.2°C
88
October
12.1°C
64.4
November
4.2°C
60.3
December
-1.5°C
38.8
Iowa weather for the next seven days
10/21
Tuesday
Overcast
11.6°C/5.2°C
10/22
Wednesday
Sunny
15.4°C/1.4°C
10/23
Thursday
Sunny
14.1°C/2.3°C
10/24
Friday
Sunny
17.1°C/2°C
10/25
Saturday
Overcast
15°C/10.8°C
10/26
Sunday
Patchy rain nearby
14.4°C/12.4°C
10/27
Monday
Patchy rain nearby
16.2°C/13.2°C

Iowa FAQ

What are the most popular attractions in Iowa?
While there's no single number one attraction, the Iowa State Fair in Des Moines is a massive annual event celebrating agriculture with rides, concerts, and unique foods. Effigy Mounds National Monument near Marquette preserves ancient burial mounds. The National Mississippi River Museum & Aquarium in Dubuque offers an in-depth look at river ecology and culture. Other notable sites include the Grotto of the Redemption and the Field of Dreams movie site.
When is the best time to visit Iowa?
The fall, from September to October, offers pleasant temperatures, beautiful foliage, and fewer crowds, making it ideal for outdoor activities. Summer, from June to August, is perfect for festivals and warm, sunny days, though it can be hot and humid. Spring is a good shoulder season with mild weather but can experience severe storms. Winter provides unique experiences for those who enjoy snow and cold.
Where are the prettiest places in Iowa?
Lake Okoboji is a beautiful and buzzy recreational spot. The charming Dutch-inspired town of Pella is also visually appealing. Dunnings Spring Park offers natural beauty, and the city of Dubuque along the Mississippi River provides scenic vistas. The River Bluffs Scenic Byway showcases the state's picturesque landscapes.
Are there compelling reasons to visit Iowa?
Absolutely. Iowa's landscape holds many hidden gems, from rolling hills to scenic rivers. The state boasts fascinating history, notable personalities, and a rich culture with fun and educational activities for all ages. Exploring Iowa offers a unique glimpse into the heart of the American Midwest.
What kind of outdoor activities can I enjoy in Iowa?
Iowa offers a variety of outdoor activities. You can enjoy hiking and camping in its state parks, boating and fishing on its many lakes like Okoboji, and exploring scenic byways for road trips. The state also has numerous trails for biking and scenic walks, allowing visitors to connect with its natural beauty.