US Geography / US Weather / Oklahoma Weather / Duncan |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Avg. High | 48° | 54° | 64° | 74° | 81° | 88° | 94° | 94° | 85° | 75° | 64° | 52° |
| Avg. Low | 25° | 30° | 38° | 50° | 58° | 66° | 71° | 70° | 62° | 50° | 38° | 28° |
| Mean | 38° | 44° | 52° | 64° | 70° | 78° | 84° | 82° | 74° | 64° | 51° | 41° |
| Avg. Precip. | 1.3 in | 1.7 in | 2.6 in | 3.0 in | 5.1 in | 4.0 in | 2.3 in | 2.4 in | 4.4 in | 3.4 in | 2.3 in | 1.5 in |
Degrees in Fahrenheit
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