DE KALB, IL US
GHCN ID: USC00112223 · IL, US · 266.1 m elevation · Records 1966-2026 (60 years)
Primary station for Cortland, IL.
Monthly climate normals (1991-2020)
| Month | High | Low | Mean | Precip | Snow |
|---|---|---|---|---|---|
| January | 28.1°F | 13.1°F | 20.6°F | 1.69 in | 10.2 in |
| February | 32.5°F | 16.6°F | 24.5°F | 1.71 in | 8.7 in |
| March | 45.0°F | 26.8°F | 35.9°F | 2.24 in | 4.4 in |
| April | 58.6°F | 37.3°F | 48.0°F | 3.56 in | 1.3 in |
| May | 70.2°F | 49.2°F | 59.7°F | 4.79 in | — |
| June | 79.9°F | 59.5°F | 69.7°F | 4.57 in | — |
| July | 83.1°F | 63.3°F | 73.2°F | 4.00 in | — |
| August | 81.2°F | 61.3°F | 71.3°F | 4.06 in | — |
| September | 74.9°F | 53.2°F | 64.0°F | 3.32 in | — |
| October | 62.0°F | 41.0°F | 51.5°F | 2.96 in | 0.1 in |
| November | 46.3°F | 29.6°F | 37.9°F | 2.31 in | 1.8 in |
| December | 33.6°F | 19.1°F | 26.3°F | 2.04 in | 6.6 in |