Royal, Illinois
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 16° 34° -27° (1985) 68° (1950) 2.07" NA
February 20° 39° -19° (1996) 72° (2000) 2.1" NA
March 30° 50° -13° (1980) 85° (1986) 2.98" NA
April 40° 64° 10° (1982) 90° (1986) 3.84" NA
May 51° 74° 26° (2002) 97° (1991) 4.36" NA
June 62° 84° 38° (1993) 104° (1988) 3.94" NA
July 65° 87° 43° (2001) 109° (1954) 4.59" NA
August 62° 85° 38° (1986) 102° (1988) 4.05" NA
September 54° 79° 29° (2001) 101° (1953) 3.09" NA
October 42° 66° 21° (2000) 93° (2007) 3.32" NA
November 32° 52° -5° (1950) 81° (1968) 3.47" NA
December 21° 38° -22° (1989) 70° (1998) 2.59" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
May 1 46° 69° 31° (1978) 97° (1965) 0.14" NA
May 2 46° 70° 29° (1966) 89° (1965) 0.14" NA
May 3 47° 70° 27° (1978) 88° (1949) 0.13" NA
May 4 47° 70° 32° (1954) 89° (1952) 0.14" NA
May 5 47° 71° 33° (1968) 93° (1952) 0.14" NA
May 6 48° 71° 28° (1989) 90° (1949) 0.14" NA
May 7 48° 71° 30° (1989) 90° (2004) 0.13" NA
May 8 49° 72° 34° (1976) 89° (2007) 0.14" NA
May 9 49° 72° 31° (1966) 92° (1993) 0.14" NA
May 10 49° 72° 26° (1966) 89° (2004) 0.14" NA
May 11 50° 73° 34° (1960) 88° (1958) 0.15" NA
May 12 50° 73° 32° (1960) 91° (1956) 0.14" NA
May 13 50° 73° 35° (1960) 91° (1956) 0.15" NA
May 14 51° 74° 38° (1984) 86° (1962) 0.15" NA
May 15 51° 74° 37° (1996) 93° (1987) 0.14" NA
May 16 51° 74° 33° (1997) 93° (2001) 0.14" NA
May 17 52° 75° 37° (1994) 94° (2001) 0.14" NA
May 18 52° 75° 27° (2002) 91° (1964) 0.13" NA
May 19 53° 75° 34° (2002) 91° (1977) 0.14" NA
May 20 53° 76° 32° (1981) 95° (1998) 0.14" NA
May 21 53° 76° 26° (2002) 91° (1970) 0.14" NA
May 22 54° 76° 35° (1997) 93° (1987) 0.15" NA
May 23 54° 77° 39° (1961) 93° (1975) 0.14" NA
May 24 54° 77° 39° (1956) 93° (2010) 0.14" NA
May 25 55° 77° 35° (1988) 95° (1967) 0.14" NA
May 26 55° 78° 36° (1961) 93° (1967) 0.15" NA
May 27 55° 78° 35° (1961) 95° (1967) 0.13" NA
May 28 56° 78° 35° (1992) 94° (1991) 0.15" NA
May 29 56° 79° 34° (1965) 97° (1991) 0.14" NA
May 30 57° 79° 40° (1966) 94° (2006) 0.14" NA
May 31 57° 80° 40° (1966) 94° (1991) 0.14" NA
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