Climate of Iowa
The state Iowa has a continental climate. It is warm in the summer and cold in the winter. The average annual temperature for Iowa is 14° degrees and there is about 553 mm of rain in a year. It is dry for 190 days a year with an average humidity of 78% and an UV-index of 4.
Climate averages for the whole year
- Day: the average daily temperature during the day is between -3°C and 28°C
- Night:the average nighttime temperature is between -10°C and 18°C
- Rain: it rains 125 days and there is a total of approximately 553 mm rainfall
- Snow: it snows an average of 38 days per year
- Sun hours: throughout the year there are 2698 sun hours
Maximum temperature: | between -3°C and 28°C |
Warmest month: | 28°C in July |
Coldest month: | -3°C in January |
Night temperature: | between -10°C and 18°C |
Dry days: | 202 days |
Days with rain: | 125 days |
Days with snow: | 38 days |
Total rain sum: | 553 mm |
Hours of sunshine: | 2698 hours |
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Temperature graph
This graph shows the average maximum temperature (red) and minimum temperature (blue) for Iowa.
Precipitation graph
This graph shows the average amount of rainfall per month for Iowa.
Climate table of Iowa
In this climate table you can see at a glance what the average weather per month is for Iowa. The data has been collected over a 30-year period, from which an average per month has been derived. From year to year the differences may be larger or smaller, but with this climate table you have a good idea of what the weather for Iowa might be like in a given month.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Day temp. (°C) | -3 | -1 | 8 | 15 | 21 | 26 | 28 | 27 | 24 | 16 | 8 | 0 |
Night temp. (°C) | -10 | -8 | -1 | 6 | 12 | 17 | 18 | 17 | 13 | 7 | 0 | -6 |
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
Precipitation (mm) | 20 | 26 | 41 | 61 | 82 | 69 | 43 | 56 | 49 | 44 | 33 | 29 |
Days with rain | 5 | 5 | 10 | 14 | 16 | 16 | 14 | 11 | 10 | 10 | 8 | 6 |
Days with snow | 10 | 9 | 6 | 1 | - | - | - | - | - | 1 | 3 | 8 |
Dry days | 16 | 14 | 15 | 15 | 15 | 14 | 17 | 20 | 20 | 20 | 19 | 17 |
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
Sun hours per day | 4 | 4 | 6 | 8 | 9 | 10 | 11 | 10 | 10 | 5 | 5 | 4 |
Wind force (Bft) | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 3 | 3 | 3 | 3 |
UV-index | 1 | 2 | 3 | 4 | 5 | 6 | 6 | 5 | 4 | 2 | 2 | 2 |
Best time to visit Iowa
The best time to visit Iowa in the United States is May through September. In this period you have a warm temperature and little precipitation. The highest average temperature in the state of Iowa is 28°C in July and the lowest is-3°C in January.
Climate of Iowa by month
What is the average climate in a given month for Iowa? Click on a month to see all monthly averages for sunshine, maximum and minimum temperatures, percent chance of rain per day, snowfall and number of rainy days.
Iowa weather experiences
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