Willow Hill, IL
Climate overview — based on NOAA 1991-2020 normals from STE MARIE (RIVER), IL US.
Year-round temperatures (°F)
Avg high
Avg low
Best time to visit Willow Hill
Full guide →Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | °F | °F | °F | 3.20 in | 5.4 in | 9 |
| February | °F | °F | °F | 2.47 in | 2.7 in | 8 |
| March | °F | °F | °F | 3.53 in | 1.1 in | 9 |
| April | °F | °F | °F | 4.85 in | — | 10 |
| May | °F | °F | °F | 4.91 in | — | 11 |
| June | °F | °F | °F | 4.85 in | — | 9 |
| July | °F | °F | °F | 4.49 in | — | 8 |
| August | °F | °F | °F | 3.47 in | — | 7 |
| September | °F | °F | °F | 3.79 in | — | 7 |
| October | °F | °F | °F | 3.53 in | 0.2 in | 7 |
| November | °F | °F | °F | 3.67 in | 0.6 in | 9 |
| December | °F | °F | °F | 2.91 in | 4.2 in | 9 |
Last spring / first fall frost
All-time recordsHottest, coldest, wettest
Planting calendarWhat to plant, and when