Jefferson, Colorado
Monthly Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
January 30° -28° (1979) 56° (2005) 0.68" NA
February 32° -26° (1985) 55° (1979) 0.84" NA
March 13° 37° -21° (1969) 62° (1987) 1.62" NA
April 20° 43° -14° (1997) 64° (1992) 2.49" NA
May 29° 52° 8° (1979) 75° (2000) 2.09" NA
June 37° 63° 8° (1999) 84° (1979) 1.78" NA
July 42° 68° 27° (1992) 83° (1983) 2.53" NA
August 41° 67° 24° (1978) 78° (1986) 2.74" NA
September 34° 60° 9° (1985) 78° (1983) 1.59" NA
October 25° 50° -5° (1993) 72° (1997) 1.19" NA
November 14° 37° -21° (1979) 63° (1975) 1.1" NA
December 32° -23° (1996) 57° (1998) 0.78" NA
Daily Averages & Records -  °F | °C
Date Average
Low
Average
High
Record
Low
Record
High
Average
Precipitation
Average
Snow
Jun 1 34° 58° 19° (1970) 72° (2000) 0.06" NA
Jun 2 34° 59° 21° (1990) 71° (2002) 0.06" NA
Jun 3 34° 59° 24° (1990) 69° (1977) 0.06" NA
Jun 4 35° 60° 24° (1992) 70° (1977) 0.06" NA
Jun 5 35° 60° 25° (1993) 79° (1987) 0.06" NA
Jun 6 35° 61° 21° (1983) 72° (1988) 0.06" NA
Jun 7 35° 61° 24° (1993) 75° (2006) 0.05" NA
Jun 8 36° 61° 21° (2007) 75° (1985) 0.05" NA
Jun 9 36° 62° 22° (1995) 77° (2000) 0.05" NA
Jun 10 36° 62° 23° (1995) 75° (2002) 0.05" NA
Jun 11 36° 62° 18° (1975) 73° (2001) 0.06" NA
Jun 12 37° 63° 8° (1999) 72° (1968) 0.06" NA
Jun 13 37° 63° 24° (1975) 74° (2006) 0.06" NA
Jun 14 37° 63° 25° (1976) 75° (2006) 0.06" NA
Jun 15 37° 64° 25° (1981) 77° (1993) 0.06" NA
Jun 16 37° 64° 27° (1997) 73° (1977) 0.06" NA
Jun 17 38° 64° 26° (1992) 76° (1994) 0.06" NA
Jun 18 38° 64° 29° (1995) 75° (1994) 0.06" NA
Jun 19 38° 65° 26° (1973) 79° (2002) 0.06" NA
Jun 20 38° 65° 30° (1993) 77° (1989) 0.06" NA
Jun 21 38° 65° 29° (1975) 84° (1979) 0.06" NA
Jun 22 39° 65° 26° (1989) 76° (1978) 0.06" NA
Jun 23 39° 66° 27° (1989) 78° (1980) 0.06" NA
Jun 24 39° 66° 28° (1995) 78° (1978) 0.06" NA
Jun 25 39° 66° 26° (1995) 78° (1980) 0.06" NA
Jun 26 39° 66° 26° (1995) 78° (2007) 0.06" NA
Jun 27 40° 67° 26° (1995) 79° (1994) 0.06" NA
Jun 28 40° 67° 31° (1997) 77° (1990) 0.06" NA
Jun 29 40° 67° 30° (1995) 80° (1990) 0.07" NA
Jun 30 40° 67° 28° (1995) 80° (1990) 0.07" NA
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