Sea Level Pressure Extremes at Boise, Idaho January 1980 through April 2012 (1864-1980) highest 31.13 on January 21, 1930 lowest 28.97 on December 23, 1955 and January 22, 2010 normal 30.24 30.15 30.03 29.97 29.91 29.89 29.90 29.96 29.98 30.07 30.15 30.24 30.04 (1961-1990) Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year 1980 23 4 16 11 18 27 15 29 22 28 25 15 Dec 30.60 30.53 30.44 30.43 30.13 30.34 30.12 30.11 30.30 30.62 30.70 30.86 30.86 10 19 3 20 22 22 28 17 13 15 23 4 Oct 29.16 29.32 29.58 29.43 29.56 29.66 29.71 29.51 29.67 28.61 29.67 29.36 28.61 1981 11 21 9 4 9 15 8 7 31 1 3 Oct 30.54 30.60 30.40 30.46 30.26 30.31 30.27 30.14 30.64 30.61 30.46 30.64 28 24 20 19 15 5 6 29 28 14 31 Dec 29.55 29.45 29.43 29.66 29.56 29.61 29.58 29.55 29.55 29.48 29.42 29.42 1982 8 6 5 20 5 8 28 31 1 9 2 25 Feb 30.74 30.77 30.30 30.60 30.37 30.18 30.14 30.16 30.24 30.51 30.55 30.66 30.77 2 14 28 11 26 30 13 1 28 26 30 23 Nov 29.43 29.72 29.48 29.46 29.52 29.59 29.70 29.62 29.58 29.62 29.14 29.20 29.14 1983 1 19 31 1 17 13 10 12 20 24 27 23 Jan 30.75 30.35 30.28 30.32 30.23 30.22 30.35 30.15 30.61 30.53 30.41 30.66 30.75 27 18 3 20 31 1 13 18 7 13 20 3 Mar 29.45 29.46 29.20 29.56 29.50 29.52 29.65 29.75 29.56 29.78 29.55 29.49 29.20 1984 1 4 4 14 7 1 1 29 28 23 26 6 Jan 30.90 30.65 30.44 30.37 30.44 30.27 30.13 30.18 30.38 30.47 30.40 30.72 30.90 14 13 13 19 30 4 5 5 11 10 13 27 Nov 30.07 29.66 29.56 29.64 29.65 29.52 29.66 29.65 29.57 29.53 29.50 29.60 29.50 1985 3 14 8 1 15 8 1 9 23 4 14 17 Dec 30.89 30.68 30.49 30.46 30.23 30.23 30.16 30.20 30.30 30.54 30.58 30.96 30.96 8 8 26 15 27 20 29 15 17 21 10 2 Mar,Oct 29.97 29.52 29.36 29.55 29.63 29.65 29.63 29.62 29.61 29.36 29.54 29.55 29.36 1986 7 26 20 19 12 4 19 31 21 31 Jan 30.81 30.32 30.44 30.41 30.24 30.18 30.17 30.13 30.20 30.39 30.81 30 15 8 22 20 19 4 15 24 2 Feb 29.77 29.34 29.48 29.57 29.54 29.58 29.53 29.65 29.36 29.79 29.34 1987 1988 24 4 17 9 10 29 17 4 28 8 30 16 Jan 30.78 30.74 30.55 30.58 30.37 30.23 30.21 30.13 30.47 30.40 30.73 30.77 30.78 11 13 26 21 15 4 3 11 6 13 13 25 Jul 29.54 29.84 29.66 29.51 29.58 29.55 29.48 29.55 29.65 29.88 29.52 29.55 29.48 1989 26 8 20 4 19 21 17 28 21 28 24 Feb 30.78 30.88 30.46 30.48 30.33 30.32 30.12 30.08 30.22 30.65 30.72 30.88 31 1 2 21 9 29 31 30 16 25 17 Mar 29.66 29.57 29.22 29.54 29.56 29.58 29.64 29.54 29.51 29.54 29.82 29.22 1990 24 22 16 10 4 19 26 22 22 8 28 23 Dec 30.54 30.56 30.35 30.35 30.28 30.17 30.11 30.13 30.21 30.52 30.59 31.05 31.05 30 16 11 16 28 9 23 15 15 1 20 19 Jan 29.37 29.46 29.64 29.47 29.51 29.60 29.58 29.60 29.76 29.73 29.60 29.44 29.37 1991 2 6 8 8 5 17 27 29 22 30 22 20 Nov 30.64 30.52 30.32 30.37 30.20 30.17 30.15 30.12 30.38 30.58 30.69 30.65 30.69 28 28 1 23 16 19 9 9 13 26 17 6 Mar 29.86 29.19 29.17 29.68 29.57 29.63 29.67 29.61 29.69 29.40 29.59 29.71 29.17 1992 9 25 19 23 2 13 25 16 7 23 26 23 Nov 30.58 30.55 30.28 30.40 30.37 30.10 30.14 30.32 30.31 30.48 30.82 30.68 30.82 5 15 1 29 19 28 4 21 24 29 22 28 Dec 29.56 29.61 29.68 29.53 29.59 29.47 29.65 29.49 29.62 29.47 29.67 29.42 29.42 1993 30 27 5 19 9 24 31 1 26 26 26 24 Nov 30.63 30.54 30.71 30.27 30.25 30.27 30.33 30.29 30.38 30.61 30.82 30.78 30.82 1 20 26 1 3 6 28 7 11 5 22 11 Feb 29.63 29.26 29.72 29.74 29.39 29.62 29.60 29.60 29.64 29.75 29.66 29.30 29.26 1994 31 1 12 11 1 8 7 29 15 8 22 8 Nov 30.68 30.67 30.66 30.29 30.12 30.30 30.21 30.09 30.27 30.31 30.81 30.63 30.81 24 17 22 25 15 6 4 7 2 14 1 3 Feb 29.80 29.25 29.63 29.52 29.46 29.51 29.67 29.57 29.67 29.54 29.56 29.80 29.25 1995 1 3 27 23 28 23 30 18 21 19 20 25 Jan 30.60 30.57 30.44 30.31 30.12 30.23 30.26 30.25 30.45 30.59 30.49 30.53 30.60 10 13 10 27 6 15 2 10 25 11 8 12 Dec 29.48 29.56 29.34 29.57 29.58 29.52 29.46 29.55 29.70 29.68 29.77 29.32 29.32 1996 11 12 16 28 20 2 19 29 27 27 26 17 Dec 30.67 30.50 30.45 30.51 30.09 30.31 30.17 30.16 30.28 30.56 30.58 30.77 30.77 16 19 5 16 17 16 17 26 12 24 19 10 Jan 29.38 29.49 29.45 29.48 29.63 29.59 29.57 29.53 29.56 29.47 29.46 29.41 29.38 1997 29 24 18 2 7 24 1 5 27 13 2 11 Dec 30.63 30.65 30.40 30.39 30.24 30.20 30.19 30.20 30.32 30.48 30.48 30.90 30.90 26 27 30 3 20 21 9 15 13 1 26 7 Dec 29.59 29.47 29.58 29.56 29.61 29.53 29.64 29.50 29.61 29.49 29.49 29.45 29.45 1998 6 28 9 26 18 27 26 2 27 20 12 21 Dec 30.26 30.35 30.41 30.33 30.24 30.20 30.09 30.21 30.08 30.44 30.42 30.79 30.79 19 14 28 23 12 15 2 15 8 1 23 2 Feb 29.42 29.31 29.40 29.47 29.45 29.64 29.59 29.63 29.55 29.60 29.55 29.79 29.31 1999 3 11 2 14 5 9 5 31 12 3 1 24 Dec 30.55 30.71 30.31 30.56 30.30 30.09 30.24 30.20 30.23 30.22 30.61 30.89 30.89 20 9 31 1 3 24 2 30 5 1 8 13 Feb 29.55 29.36 29.60 29.67 29.46 29.45 29.53 29.54 29.71 29.85 29.59 29.78 29.36 2000 6 7 31 30 12 13 19 20 24 22 20 18 Dec 30.60 30.48 30.45 30.33 30.31 30.24 30.12 30.12 30.34 30.37 30.63 30.83 30.83 11 14 5 18 16 8 1 9 21 10 4 14 Mar 29.55 29.45 29.39 29.50 29.44 29.41 29.66 29.65 29.52 29.49 29.65 29.76 29.39 2001 2 1 27 24 3 18 31 6 8 12 8 24 Jan 30.83 30.55 30.30 30.35 30.36 30.20 30.07 30.07 30.22 30.38 30.65 30.72 30.83 11 23 25 2 27 1 15 3 25 23 24 14 Nov 29.65 29.65 29.76 29.47 29.47 29.46 29.55 29.62 29.64 29.69 29.27 29.52 29.27 2002 24 9 3 24 8 19 9 24 9 12 20 8 Feb 30.47 30.87 30.61 30.46 30.28 30.13 30.26 30.09 30.28 30.58 30.60 30.53 30.87 26 7 7 26 19 27 13 19 3 10 8 16 Dec 29.63 29.68 29.55 29.48 29.43 29.61 29.57 29.57 29.58 29.72 29.29 29.30 29.30 2003 16 6 29 7 19 26 27 30 13 31 27 17 Nov 30.63 30.47 30.55 30.39 30.50 30.21 30.21 30.12 30.35 30.16 30.64 30.59 30.64 31 16 31 2 3 19 7 19 7 15 30 16 14 Jun 29.87 29.68 29.62 29.47 29.55 29.44 29.51 29.66 29.71 29.98 29.66 29.52 29.44 2004 5 12 7 26 1 15 5 27 21 31 1 18 Dec 30.69 30.59 30.66 30.35 30.21 30.13 30.06 30.24 30.36 30.43 30.61 30.76 30.76 1 25 18 27 4 7 31 1 18 17 27 29 Oct 29.40 29.55 29.65 29.57 29.53 29.58 29.64 29.61 29.54 29.31 29.88 29.46 29.31 2005 15 2 31 5 25 13 26 31 28 30 15 10 Dec 30.61 30.61 30.60 30.41 30.30 30.13 30.16 30.14 30.33 30.45 30.72 30.78 30.78 7 20 23 7 16 5 8 29 9 15 7 31 Dec 29.30 29.72 29.45 29.54 29.46 29.46 29.56 29.59 29.54 29.60 29.72 29.21 29.21 2006 23 11 23 18 10 24 7 31 24 27 29 3 Dec 30.66 30.79 30.30 30.40 30.31 30.19 30.18 30.19 30.30 30.55 30.65 30.84 30.84 14 28 25 5 22 11 11 29 15 15 13 27 Apr 29.57 29.41 29.43 29.37 29.52 29.61 29.61 29.57 29.55 29.52 29.49 29.53 29.37 2007 15 4 3 3 14 25 3 21 10 22 28 31 Jan 30.80 30.54 30.63 30.26 30.21 30.20 30.09 30.09 30.29 30.67 30.60 30.75 30.80 10 22 26 7 1 6 18 19 28 16 30 7 Sep 29.72 29.49 29.50 29.65 29.51 29.55 29.56 29.59 29.47 29.57 29.80 29.68 29.47 2008 1 26 22 11 15 12 12 28 23 22 14 10 Jan 30.82 30.51 30.60 30.50 30.29 30.15 30.13 30.14 30.28 30.68 30.65 30.60 30.82 28 3 28 14 23 10 3 30 9 4 4 12 Jan 29.13 29.32 29.60 29.44 29.36 29.69 29.56 29.43 29.59 29.57 29.52 29.31 29.13 2009 18 2 12 19 8 27 13 8 21 1 25 24 Jan 30.86 30.61 30.42 30.38 30.29 30.19 30.11 30.12 30.43 30.40 30.56 30.50 30.86 2 9 29 8 18 5 5 23 13 13 20 21 Oct 29.44 29.60 29.43 29.47 29.57 29.55 29.65 29.65 29.47 29.39 29.51 29.68 29.39 2010 7 23 15 7 4 5 14 23 25 12 12 7 Nov 30.56 30.31 30.49 30.43 30.35 30.13 30.14 30.34 30.25 30.47 30.62 30.48 30.62 22 27 29 27 17 28 1 28 7 24 23 29 Jan 28.97 29.72 29.42 29.31 29.57 29.60 29.57 29.52 29.52 29.45 29.49 29.16 28.97 2011 6 3 4 14 4 14 1 16 28 26 26 24 Dec 30.58 30.75 30.38 30.31 30.43 30.16 30.14 30.12 30.21 30.44 30.73 30.82 30.82 18 16 21 2 15 28 12 30 15 5 4 30 Feb 29.94 29.38 29.39 29.52 29.41 29.49 29.57 29.57 29.64 29.44 29.54 29.68 29.38 2012 28 16 8 2 30.66 30.46 30.57 30.33 21 25 31 11 11 29.34 29.57 29.28 29.49 Extremes Since 1980: max 31.05/Dec 1990 min 28.97/Dec 1955, Jan 2010 5/4/2012 sea level pressure extremes at boise.txt