Brighton, IL
Climate overview — based on NOAA 1991-2020 normals from MEDORA 1 S, IL US.
Year-round temperatures (°F)
Avg high
Avg low
Best time to visit Brighton
Full guide →Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | °F | °F | °F | 2.49 in | 5.1 in | 8 |
| February | °F | °F | °F | 2.21 in | 4.9 in | 7 |
| March | °F | °F | °F | 3.13 in | 2.4 in | 9 |
| April | °F | °F | °F | 4.40 in | 0.2 in | 10 |
| May | °F | °F | °F | 5.18 in | — | 12 |
| June | °F | °F | °F | 3.23 in | — | 8 |
| July | °F | °F | °F | 3.42 in | — | 7 |
| August | °F | °F | °F | 3.52 in | — | 8 |
| September | °F | °F | °F | 3.20 in | — | 7 |
| October | °F | °F | °F | 3.41 in | — | 8 |
| November | °F | °F | °F | 3.13 in | 1.2 in | 8 |
| December | °F | °F | °F | 2.44 in | 2.7 in | 8 |
Last spring / first fall frost
All-time recordsHottest, coldest, wettest
Planting calendarWhat to plant, and when