Walnut Hill, IL
Climate overview — based on NOAA 1991-2020 normals from IUKA 12 SW, IL US.
Year-round temperatures (°F)
Climate summary
Walnut Hill has an annual average temperature of 54.7°F with about 44.7 inches of precipitation per year and 12 inches of snow. The warmest month is July (average high 87.5°F), and the coldest is January (average low 20.9°F). May is typically the wettest month (5.20 in) and February the driest (2.58 in). Snow typically falls from November through March.
Best time to visit Walnut Hill
Full guide →Climate change signal
All-time records →114 of 366 (31.1%) of Walnut Hill's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 1990s | 49 | |
| 2000s | 126 | |
| 2010s | 131 | |
| 2020s | 60 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 38.8°F | 20.9°F | 29.8°F | 2.87 in | 3.4 in | 8 |
| February | 44.0°F | 24.3°F | 34.2°F | 2.58 in | 4.5 in | 8 |
| March | 54.2°F | 33.0°F | 43.6°F | 3.90 in | 0.5 in | 11 |
| April | 66.2°F | 43.6°F | 54.9°F | 4.81 in | — | 11 |
| May | 75.2°F | 53.5°F | 64.4°F | 5.20 in | — | 12 |
| June | 84.1°F | 62.3°F | 73.2°F | 4.08 in | — | 10 |
| July | 87.5°F | 65.8°F | 76.7°F | 3.85 in | — | 9 |
| August | 86.9°F | 63.7°F | 75.3°F | 3.54 in | — | 8 |
| September | 81.0°F | 55.8°F | 68.4°F | 3.29 in | — | 7 |
| October | 69.3°F | 44.7°F | 57.0°F | 3.45 in | — | 9 |
| November | 54.9°F | 34.2°F | 44.5°F | 4.09 in | 0.4 in | 9 |
| December | 43.2°F | 25.5°F | 34.4°F | 3.02 in | 3.2 in | 9 |
Climate twins of Walnut Hill
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).