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Diagonal, IA Climate
1991 to 2020 normals at Mt Ayr, 8.8 mi from the center of Diagonal, elevation 1140 ft.
Average weather by month
Select a month for daily normals and last year's weather
| Month | Range | High | Low | Precip. | Snow |
|---|---|---|---|---|---|
| January | 32° | 12° | 0.73 in | 5.8 in | |
| February | 37° | 16° | 1.25 in | 5.9 in | |
| March | 49° | 28° | 2.16 in | 2.6 in | |
| April | 61° | 38° | 3.37 in | 0.7 in | |
| May | 71° | 50° | 5.35 in | 0.0 in | |
| June | 80° | 60° | 5.39 in | 0.0 in | |
| July | 85° | 64° | 4.40 in | 0.0 in | |
| August | 83° | 62° | 3.98 in | 0.0 in | |
| September | 76° | 53° | 3.71 in | 0.0 in | |
| October | 64° | 40° | 2.88 in | 0.3 in | |
| November | 49° | 28° | 2.11 in | 1.2 in | |
| December | 37° | 18° | 1.63 in | 4.0 in | |
| Year | 60° | 36.96 in | 20.5 in |
Frequently asked questions
- What is the hottest month in Diagonal, IA?
- July is the warmest month, with a normal high of 85°F at Mt Ayr.
- What is the coldest month in Diagonal, IA?
- January is the coldest month, with a normal low of 12°F.
- What is the wettest month in Diagonal, IA?
- June has the most precipitation on average, about 5.39 inches.