Hillside, IL
Climate overview — based on NOAA 1991-2020 normals from OAK BROOK 2W, IL US.
Year-round temperatures (°F)
Avg high
Avg low
Best time to visit Hillside
Full guide →Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | °F | °F | °F | 2.17 in | 12.6 in | 11 |
| February | °F | °F | °F | 2.30 in | 14.5 in | 10 |
| March | °F | °F | °F | 2.48 in | 4.1 in | 12 |
| April | °F | °F | °F | 3.83 in | 0.8 in | 12 |
| May | °F | °F | °F | 4.19 in | — | 13 |
| June | °F | °F | °F | 4.13 in | — | 13 |
| July | °F | °F | °F | 3.99 in | — | 10 |
| August | °F | °F | °F | 4.62 in | — | 10 |
| September | °F | °F | °F | 3.45 in | — | 9 |
| October | °F | °F | °F | 3.36 in | — | 11 |
| November | °F | °F | °F | 2.75 in | 0.6 in | 9 |
| December | °F | °F | °F | 2.40 in | 9.7 in | 13 |
Last spring / first fall frost
All-time recordsHottest, coldest, wettest
Planting calendarWhat to plant, and when