May weather in Monticello, IL
The average temperature in Monticello in May is °F (°F–°F). Average precipitation: 4.80 inches.
May is a spring month in Monticello, and is cooler than the annual average of 0°F. Expect about 12 days with precipitation. Daylight averages about 14h 13m.
Avg High
°F
Avg Low
°F
Precipitation
4.80 in
Daylight
14h 13m
May records in Monticello
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| May 1 | — | — | 3.10 in (1983) |
| May 2 | — | — | 1.03 in (1977) |
| May 3 | — | — | 1.50 in (1997) |
| May 4 | — | — | 0.84 in (1996) |
| May 5 | — | — | 1.42 in (2003) |
| May 6 | — | — | 1.42 in (1977) |
| May 7 | — | — | 1.60 in (1967) |
| May 8 | — | — | 0.84 in (1974) |
| May 9 | — | — | 2.15 in (1995) |
| May 10 | — | — | 0.80 in (1981) |
| May 11 | — | — | 1.22 in (1981) |
| May 12 | — | — | 1.51 in (2002) |
| May 13 | — | — | 1.03 in (2009) |
| May 14 | — | — | 1.92 in (2009) |
| May 15 | — | — | 4.38 in (1990) |
| May 16 | — | — | 1.65 in (1968) |
| May 17 | — | — | 2.84 in (1995) |
| May 18 | — | — | 1.36 in (1981) |
| May 19 | — | — | 1.75 in (1984) |
| May 20 | — | — | 1.14 in (1974) |
| May 21 | — | — | 0.70 in (1983) |
| May 22 | — | — | 0.75 in (1988) |
| May 23 | — | — | 1.75 in (1968) |
| May 24 | — | — | 2.24 in (1995) |
| May 25 | — | — | 1.90 in (1984) |
| May 26 | — | — | 1.58 in (1982) |
| May 27 | — | — | 1.91 in (1996) |
| May 28 | — | — | 0.94 in (1973) |
| May 29 | — | — | 0.35 in (1976) |
| May 30 | — | — | 0.96 in (1991) |
| May 31 | — | — | 2.64 in (1999) |