Islip, New York
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 23° 39° -7° (1988) 69° (2002) 4.27" NA
February 24° 41° 1° (1996) 67° (1991) 3.33" NA
March 31° 48° 8° (1990) 82° (1990) 4.76" NA
April 40° 58° 24° (2007) 94° (2002) 4.13" NA
May 49° 69° 34° (2000) 98° (1996) 3.9" NA
June 60° 77° 43° (2001) 95° (1999) 3.71" NA
July 66° 83° 50° (1988) 102° (1999) 2.93" NA
August 64° 82° 45° (1986) 100° (2001) 4.48" NA
September 57° 75° 38° (1997) 92° (1998) 3.39" NA
October 45° 64° 28° (1985) 88° (2007) 3.63" NA
November 36° 54° 11° (1989) 78° (1990) 3.86" NA
December 27° 44° 5° (2004) 77° (1998) 4.13" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Jan 1 24° 40° 12° (1997) 60° (2005) 0.14" NA
Jan 2 24° 40° 8° (1999) 57° (2000) 0.14" NA
Jan 3 24° 40° 7° (2001) 63° (2000) 0.14" NA
Jan 4 24° 40° 11° (1989) 64° (1998) 0.14" NA
Jan 5 23° 40° 10° (1988) 63° (1993) 0.14" NA
Jan 6 23° 40° 6° (1996) 68° (2007) 0.14" NA
Jan 7 23° 40° 13° (1988) 55° (2007) 0.14" NA
Jan 8 23° 39° 14° (1986) 59° (1998) 0.14" NA
Jan 9 23° 39° 6° (2004) 55° (2006) 0.14" NA
Jan 10 23° 39° 3° (2004) 56° (2000) 0.14" NA
Jan 11 23° 39° 1° (1988) 53° (2000) 0.14" NA
Jan 12 23° 39° 8° (1988) 58° (1995) 0.14" NA
Jan 13 23° 39° 16° (1997) 60° (1995) 0.14" NA
Jan 14 23° 39° -4° (1988) 67° (1995) 0.14" NA
Jan 15 22° 39° -7° (1988) 66° (1995) 0.14" NA
Jan 16 22° 39° 1° (2004) 60° (1995) 0.14" NA
Jan 17 22° 39° 7° (2000) 55° (1999) 0.14" NA
Jan 18 22° 39° 5° (1994) 59° (1986) 0.14" NA
Jan 19 22° 39° 1° (1994) 56° (1996) 0.14" NA
Jan 20 22° 39° 2° (1994) 54° (2006) 0.14" NA
Jan 21 22° 39° -3° (1984) 57° (2006) 0.14" NA
Jan 22 22° 39° -7° (1984) 51° (1986) 0.14" NA
Jan 23 22° 39° 3° (1991) 55° (1999) 0.14" NA
Jan 24 22° 38° 5° (2005) 59° (1989) 0.14" NA
Jan 25 22° 38° 5° (2004) 52° (1990) 0.13" NA
Jan 26 22° 38° 7° (1991) 52° (2002) 0.13" NA
Jan 27 22° 38° 5° (1994) 59° (2002) 0.13" NA
Jan 28 22° 39° 4° (2005) 61° (2002) 0.13" NA
Jan 29 22° 39° 3° (2005) 69° (2002) 0.13" NA
Jan 30 22° 39° 10° (2000) 62° (2006) 0.13" NA
Jan 31 23° 39° 6° (2000) 51° (1988) 0.13" NA
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