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Iowa Weather, Climate and Best Time to Visit

Data source:Meteostat
Update date:2025-09

Iowa year round climate

  • Spring (March–May): Average 38–63°F, 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 73–73°F, 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 66–39°F, 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–-34.7°F, 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. 50.9°F / Annual rainfall: approx. 1132 mm / Summer humidity: 60%–70% / Rainiest month: May

Iowa monthly average temperature and precipitation

Month
Air temperature (°F)
Precipitation (mm)
January
20.7°F
37.7
February
29.1°F
25.3
March
38.3°F
98.5
April
49.5°F
128.8
May
63.7°F
163.6
June
73.4°F
163.3
July
73.9°F
145.2
August
73°F
118.8
September
66.6°F
88
October
53.8°F
64.4
November
39.6°F
60.3
December
29.3°F
38.8

Iowa weather for the next seven days

9/19
Saturday
Light rain shower
78.3°F/60.5°F
9/20
Sunday
Overcast
60.8°F/56.5°F
9/21
Monday
Patchy rain nearby
59.1°F/52.5°F
9/22
Tuesday
Patchy rain nearby
52.6°F/49.2°F
9/23
Wednesday
Overcast
63°F/48.4°F
9/24
Thursday
Overcast
64.8°F/57.4°F
9/25
Friday
Sunny
65.4°F/53.5°F