All-time weather records — Monticello, IL
Record high
°F
January 1,
Record low
°F
January 1,
Wettest day
5.00 in
July 5, 1971
Records by month
| Month | Hottest day | Coldest day | Wettest day |
|---|---|---|---|
| January | — | — | 2.12 in — Jan 29, 1982 |
| February | — | — | 1.98 in — Feb 14, 1990 |
| March | — | — | 1.66 in — Mar 28, 1998 |
| April | — | — | 3.00 in — Apr 12, 1979 |
| May | — | — | 4.38 in — May 15, 1990 |
| June | — | — | 4.59 in — Jun 23, 1974 |
| July | — | — | 5.00 in — Jul 5, 1971 |
| August | — | — | 4.28 in — Aug 13, 1999 |
| September | — | — | 4.46 in — Sep 15, 2008 |
| October | — | — | 3.98 in — Oct 21, 1983 |
| November | — | — | 2.40 in — Nov 18, 1985 |
| December | — | — | 2.15 in — Dec 7, 1966 |
Click a month to see every daily record for that month in Monticello.