Islip, New York
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 23° 38° -7° (1988) 69° (2002) 3.64" 6.7"
February 25° 40° 1° (1996) 67° (1991) 3.4" 7.1"
March 31° 47° 5° (2009) 82° (1990) 4.44" 4.5"
April 41° 58° 23° (2008) 94° (2002) 4.34" 0.6"
May 50° 68° 32° (2008) 98° (1996) 3.78" 0"
June 60° 77° 42° (2009) 96° (1994) 4.27" 0"
July 66° 82° 50° (1988) 102° (1999) 3.43" 0"
August 65° 80° 45° (1986) 100° (2001) 3.98" 0"
September 58° 74° 38° (1997) 92° (1998) 3.58" 0"
October 46° 63° 28° (1985) 88° (2007) 3.79" 0"
November 37° 53° 11° (1989) 78° (1990) 3.67" 0.6"
December 28° 43° 5° (2004) 77° (1998) 4.06" 5.4"
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
May 1 45° 63° 32° (2008) 84° (2001) 0.11" 0"
May 2 46° 63° 36° (2005) 87° (2001) 0.11" 0"
May 3 46° 64° 38° (2005) 85° (2001) 0.12" 0"
May 4 46° 64° 36° (2002) 91° (2001) 0.12" 0"
May 5 46° 64° 36° (2005) 84° (2000) 0.13" 0"
May 6 47° 65° 37° (1992) 88° (1986) 0.12" 0"
May 7 47° 65° 35° (2001) 88° (2000) 0.12" 0"
May 8 47° 65° 37° (2001) 86° (2000) 0.11" 0"
May 9 48° 65° 36° (1987) 83° (2000) 0.11" 0"
May 10 48° 66° 37° (2010) 81° (1987) 0.11" 0"
May 11 48° 66° 38° (2010) 83° (2001) 0.11" 0"
May 12 48° 66° 37° (1990) 87° (1991) 0.12" 0"
May 13 49° 67° 37° (2005) 80° (2004) 0.11" 0"
May 14 49° 67° 34° (1998) 86° (1991) 0.11" 0"
May 15 49° 67° 40° (1999) 81° (1991) 0.11" 0"
May 16 50° 68° 39° (2000) 86° (1998) 0.11" 0"
May 17 50° 68° 40° (1984) 80° (1986) 0.11" 0"
May 18 50° 68° 38° (2003) 84° (1998) 0.12" 0"
May 19 51° 68° 37° (2002) 87° (1998) 0.12" 0"
May 20 51° 69° 35° (1992) 98° (1996) 0.12" 0"
May 21 51° 69° 39° (2002) 90° (1996) 0.13" 0"
May 22 52° 69° 37° (2002) 92° (1992) 0.13" 0"
May 23 52° 70° 42° (2006) 90° (1992) 0.13" 0"
May 24 52° 70° 44° (2006) 85° (1992) 0.14" 0"
May 25 53° 70° 41° (1992) 92° (1991) 0.13" 0"
May 26 53° 71° 37° (1992) 92° (2010) 0.13" 0"
May 27 53° 71° 43° (1997) 82° (2006) 0.13" 0"
May 28 54° 71° 38° (1994) 90° (1991) 0.14" 0"
May 29 54° 71° 43° (1992) 93° (1987) 0.14" 0"
May 30 55° 72° 41° (2004) 95° (1987) 0.14" 0"
May 31 55° 72° 41° (1990) 92° (1987) 0.14" 0"
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