US Geography / US Weather / Illinois Weather / Sycamore |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Avg. High | 26 | 31 | 44 | 58 | 70 | 80 | 84 | 81 | 74 | 62 | 46 | 31 |
| Avg. Low | 8 | 12 | 25 | 36 | 47 | 57 | 62 | 58 | 51 | 40 | 28 | 16 |
| Mean | 18 | 22 | 35 | 48 | 58 | 68 | 74 | 71 | 64 | 52 | 37 | 24 |
| Avg. Precip. | 1.5 in | 1.3 in | 2.4 in | 3.6 in | 3.7 in | 4.3 in | 4.4 in | 4.0 in | 3.9 in | 2.6 in | 2.9 in | 2.1 in |
Degrees in Fahrenheit
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