KASKASKIA RVR NAVIGATION LOCK, IL US
GHCN ID: USC00114629 · IL, US · 115.8 m elevation · Records 1974-2026 (52 years)
Primary station for Ellis Grove, IL.
Monthly climate normals (1991-2020)
| Month | High | Low | Mean | Precip | Snow |
|---|---|---|---|---|---|
| January | 40.4°F | 24.0°F | 32.2°F | 2.73 in | 1.4 in |
| February | 45.8°F | 27.2°F | 36.5°F | 2.35 in | 1.5 in |
| March | 56.3°F | 34.8°F | 45.5°F | 3.41 in | 0.1 in |
| April | 67.7°F | 43.9°F | 55.8°F | 4.67 in | — |
| May | 77.0°F | 54.9°F | 65.9°F | 5.18 in | — |
| June | 85.9°F | 64.3°F | 75.1°F | 4.14 in | — |
| July | 89.1°F | 68.3°F | 78.7°F | 4.13 in | — |
| August | 87.8°F | 65.6°F | 76.7°F | 3.34 in | — |
| September | 81.4°F | 57.7°F | 69.5°F | 2.94 in | — |
| October | 69.7°F | 46.2°F | 58.0°F | 3.07 in | — |
| November | 55.6°F | 36.5°F | 46.1°F | 4.01 in | 0.4 in |
| December | 44.2°F | 28.3°F | 36.2°F | 2.85 in | 0.9 in |