Historical Weather Records & Monthly Climate for Romeoville, IL
All-Time High
100°F
All-Time Low
-29°F
Max Daily Snow
9.1"
Max Wind Gust
31 mph
Monthly Climate Averages
Based on 30 years of historical data (1994 - 2023)
| Month | High (°F) | Low (°F) | Precip (in) | Snow (in) |
|---|---|---|---|---|
| January | 31° | 17° | 2.19" | 7.55" |
| February | 35° | 19° | 2.17" | 6.38" |
| March | 47° | 30° | 2.7" | 3.7" |
| April | 59° | 40° | 4.12" | 1.4" |
| May | 70° | 51° | 4.72" | 0.01" |
| June | 79° | 62° | 4.45" | 0 |
| July | 83° | 66° | 3.94" | 0 |
| August | 81° | 65° | 4.08" | 0 |
| September | 75° | 58° | 2.99" | 0 |
| October | 62° | 47° | 3.5" | 0.23" |
| November | 48° | 34° | 2.34" | 1.67" |
| December | 37° | 24° | 2.24" | 5.25" |
More Historical Climate Data for Cities in
IL