OLD FAITHFUL, WYOMING

Monthly Extreme Minimum Temperature (Degrees Fahrenheit)

(486845)

File last updated on Jul 25, 2006
*** Note *** Provisional Data *** After Year/Month 200603
a = 1 day missing, b = 2 days missing, c = 3 days, ..etc..,
z = 26 or more days missing, A = Accumulations present
Long-term means based on columns; thus, the monthly row may not
sum (or average) to the long-term annual value.
MAXIMUM ALLOWABLE NUMBER OF MISSING DAYS : 5
Individual Months not used for annual or monthly statistics if more than 5 days are missing.
Individual Years not used for annual statistics if any month in that year has more than 5 days missing.
YEAR(S) JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN
1978 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 8.00 g -1.00 a -17.00 -47.00 -47.00
1979 -44.00 -35.00 -23.00 -16.00 11.00 20.00 29.00 29.00 18.00 -6.00 -27.00 -25.00 -44.00
1980 -43.00 -26.00 -22.00 a -8.00 17.00 a 23.00 a 30.00 24.00 18.00 a 2.00 b -14.00 -21.00 -43.00
1981 -10.00 -49.00 -10.00 1.00 c 14.00 g 22.00 ----- z 23.00 20.00 13.00 c -8.00 a -19.00 -49.00
1982 -28.00 -43.00 a -13.00 -21.00 b ----- z 21.00 a 30.00 23.00 a 21.00 k 4.00 -26.00 -28.00 -43.00
1983 -18.00 -21.00 -20.00 ----- z 10.00 d 26.00 26.00 30.00 d -2.00 ----- z ----- z ----- z -21.00
1984 ----- z ----- z -18.00 -1.00 m 3.00 27.00 j 31.00 30.00 ----- z ----- z -14.00 -32.00 -32.00
1985 ----- z -43.00 -29.00 8.00 14.00 25.00 c 33.00 25.00 2.00 f -2.00 -12.00 -33.00 -43.00
1986 -19.00 -29.00 -3.00 -4.00 11.00 27.00 a 21.00 30.00 14.00 b 7.00 -32.00 -26.00 -32.00
1987 -30.00 -21.00 -22.00 1.00 22.00 21.00 27.00 23.00 14.00 5.00 -9.00 -28.00 -30.00
1988 -36.00 -19.00 -22.00 -6.00 3.00 22.00 27.00 b 26.00 20.00 18.00 -21.00 -20.00 -36.00
1989 -22.00 -36.00 -28.00 -7.00 19.00 26.00 34.00 28.00 17.00 0.00 -15.00 -30.00 -36.00
1990 -21.00 -36.00 -15.00 7.00 7.00 23.00 33.00 29.00 23.00 1.00 -16.00 -46.00 -46.00
1991 -34.00 -9.00 -16.00 3.00 9.00 26.00 31.00 31.00 17.00 -11.00 -31.00 -27.00 -34.00
1992 -22.00 -19.00 -4.00 9.00 a 19.00 25.00 29.00 14.00 14.00 9.00 -19.00 -36.00 -36.00
1993 -29.00 -30.00 -25.00 2.00 15.00 25.00 29.00 20.00 14.00 -1.00 -32.00 -17.00 -32.00
1994 -25.00 -27.00 -15.00 -5.00 22.00 22.00 27.00 28.00 17.00 10.00 -26.00 -23.00 -27.00
1995 -31.00 -23.00 -14.00 2.00 3.00 24.00 25.00 25.00 13.00 8.00 -8.00 -20.00 -31.00
1996 -38.00 -44.00 -20.00 0.00 14.00 25.00 31.00 24.00 13.00 ----- z -17.00 -35.00 -44.00
1997 -31.00 -28.00 -22.00 -15.00 14.00 27.00 30.00 29.00 24.00 5.00 -7.00 -26.00 -31.00
1998 -20.00 -23.00 -22.00 -4.00 21.00 22.00 36.00 28.00 23.00 8.00 1.00 -45.00 -45.00
1999 -26.00 -27.00 -28.00 -7.00 7.00 16.00 22.00 31.00 6.00 9.00 -9.00 -18.00 -28.00
2000 -23.00 -18.00 -20.00 -1.00 16.00 25.00 33.00 29.00 3.00 8.00 -15.00 -21.00 -23.00
2001 -20.00 -35.00 -13.00 -2.00 14.00 b 27.00 32.00 b ----- z 22.00 a ----- z -2.00 a -20.00 -35.00
2002 -23.00 -34.00 -32.00 1.00 10.00 28.00 34.00 27.00 18.00 -6.00 -16.00 -26.00 -34.00
2003 -14.00 -42.00 b -12.00 -4.00 ----- z ----- z 33.00 30.00 16.00 6.00 a -20.00 c -11.00 -42.00
2004 -31.00 -23.00 4.00 9.00 21.00 26.00 31.00 29.00 22.00 5.00 d -23.00 -30.00 -31.00
2005 -14.00 -25.00 -8.00 4.00 ----- z 29.00 31.00 26.00 24.00 12.00 -16.00 -34.00 -34.00
2006 -10.00 -35.00 -25.00 a 3.00 14.00 a 25.00 b 35.00 l ----- z ----- z ----- z ----- z ----- z -35.00
Period of Record Statistics
MEAN -25.46 -29.63 -17.75 -1.92 13.17 24.15 29.81 26.58 16.17 4.29 -16.70 -27.56 -33.88
S.D. 9.12 9.60 8.44 7.54 5.93 2.87 3.62 3.90 6.50 6.69 8.69 8.98 6.29
SKEW -0.25 -0.13 0.64 -0.73 -0.20 -0.78 -0.74 -1.40 -1.18 -0.32 -0.07 -0.61 -0.58
MAX -10.00 -9.00 4.00 9.00 22.00 29.00 36.00 31.00 24.00 18.00 1.00 -11.00 -23.00
MIN -44.00 -49.00 -32.00 -21.00 3.00 16.00 21.00 14.00 -2.00 -11.00 -32.00 -47.00 -46.00
NO YRS 26 27 28 26 24 26 26 26 24 24 27 27 17