DECATUR AP, IL US
GHCN ID: USW00003887 · IL, US · 205.7 m elevation · Records 2000-2026 (26 years)
Primary station for Dalton City, IL.
Monthly climate normals (1991-2020)
| Month | High | Low | Mean | Precip | Snow |
|---|---|---|---|---|---|
| January | 34.7°F | 20.1°F | 27.4°F | 1.99 in | — |
| February | 39.8°F | 23.4°F | 31.6°F | 1.84 in | — |
| March | 51.9°F | 32.4°F | 42.1°F | 2.51 in | — |
| April | 63.9°F | 42.3°F | 53.1°F | 3.66 in | — |
| May | 74.4°F | 53.4°F | 63.9°F | 4.38 in | — |
| June | 83.0°F | 62.4°F | 72.7°F | 4.38 in | — |
| July | 85.8°F | 65.6°F | 75.7°F | 3.32 in | — |
| August | 84.3°F | 63.1°F | 73.7°F | 3.03 in | — |
| September | 78.9°F | 55.0°F | 67.0°F | 2.98 in | — |
| October | 66.1°F | 44.4°F | 55.2°F | 3.18 in | — |
| November | 51.3°F | 34.2°F | 42.7°F | 2.97 in | — |
| December | 39.7°F | 25.2°F | 32.4°F | 2.12 in | — |