OLD FAITHFUL, WYOMING

Monthly Extreme Maximum 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 78.00 f 66.00 a 57.00 34.00 78.00
1979 33.00 42.00 52.00 57.00 73.00 84.00 82.00 a 85.00 79.00 72.00 50.00 49.00 85.00
1980 37.00 47.00 42.00 65.00 72.00 a 75.00 a 83.00 79.00 a 79.00 a 70.00 c 58.00 46.00 83.00
1981 50.00 47.00 51.00 66.00 c 67.00 h 82.00 a ----- z 83.00 81.00 62.00 c 59.00 a 45.00 83.00
1982 36.00 a 43.00 44.00 a 54.00 j ----- z 79.00 82.00 c 84.00 d 78.00 n 64.00 c 41.00 36.00 b 84.00
1983 38.00 49.00 50.00 ----- z 73.00 e 74.00 88.00 90.00 a 79.00 ----- z ----- z ----- z 90.00
1984 ----- z ----- z 43.00 65.00 l 75.00 89.00 j 93.00 90.00 ----- z ----- z 44.00 40.00 93.00
1985 ----- z 39.00 a 49.00 64.00 73.00 79.00 d 85.00 86.00 75.00 g 57.00 52.00 35.00 86.00
1986 46.00 50.00 55.00 62.00 79.00 81.00 b 86.00 86.00 84.00 b 61.00 49.00 39.00 86.00
1987 43.00 52.00 54.00 72.00 75.00 84.00 a 88.00 78.00 82.00 74.00 58.00 48.00 88.00
1988 37.00 62.00 62.00 67.00 73.00 89.00 86.00 a 85.00 80.00 72.00 54.00 40.00 89.00
1989 44.00 45.00 61.00 65.00 a 66.00 77.00 85.00 82.00 74.00 72.00 61.00 42.00 85.00
1990 41.00 45.00 54.00 64.00 66.00 85.00 85.00 86.00 82.00 69.00 55.00 47.00 86.00
1991 36.00 52.00 51.00 58.00 68.00 75.00 83.00 85.00 82.00 74.00 47.00 39.00 85.00
1992 43.00 56.00 57.00 72.00 74.00 81.00 79.00 84.00 73.00 75.00 48.00 40.00 84.00
1993 43.00 48.00 58.00 55.00 72.00 76.00 79.00 83.00 74.00 71.00 a 48.00 45.00 83.00
1994 46.00 49.00 60.00 68.00 73.00 86.00 88.00 89.00 80.00 64.00 47.00 41.00 89.00
1995 41.00 56.00 54.00 58.00 69.00 76.00 84.00 85.00 82.00 65.00 51.00 42.00 85.00
1996 45.00 52.00 48.00 63.00 67.00 81.00 82.00 84.00 77.00 ----- z 53.00 39.00 84.00
1997 44.00 42.00 52.00 55.00 69.00 76.00 81.00 86.00 80.00 72.00 57.00 38.00 a 86.00
1998 41.00 42.00 51.00 62.00 67.00 77.00 87.00 84.00 85.00 65.00 49.00 44.00 a 87.00
1999 36.00 44.00 60.00 58.00 74.00 76.00 86.00 84.00 72.00 68.00 63.00 48.00 86.00
2000 41.00 44.00 52.00 64.00 64.00 79.00 85.00 88.00 82.00 64.00 44.00 37.00 88.00
2001 42.00 34.00 51.00 64.00 75.00 80.00 85.00 ----- z 79.00 ----- z 58.00 33.00 85.00
2002 39.00 42.00 53.00 56.00 74.00 84.00 91.00 77.00 78.00 56.00 50.00 40.00 91.00
2003 38.00 40.00 53.00 60.00 ----- z ----- z 89.00 88.00 78.00 72.00 43.00 43.00 89.00
2004 45.00 41.00 59.00 58.00 66.00 73.00 84.00 81.00 75.00 64.00 d 55.00 41.00 84.00
2005 48.00 46.00 48.00 58.00 ----- z 81.00 87.00 82.00 76.00 66.00 52.00 44.00 87.00
2006 42.00 44.00 48.00 a 67.00 73.00 a 81.00 b 85.00 l ----- z ----- z ----- z ----- z ----- z 85.00
Period of Record Statistics
MEAN 41.35 46.41 52.57 62.32 71.25 79.65 85.12 84.38 78.88 67.29 51.96 41.30 86.29
S.D. 4.17 6.01 5.25 4.91 3.82 4.08 3.34 3.31 3.48 5.29 5.79 4.35 2.11
SKEW 0.00 0.54 -0.07 0.26 -0.25 0.35 0.22 -0.37 -0.33 -0.43 -0.01 -0.01 0.59
MAX 50.00 62.00 62.00 72.00 79.00 89.00 93.00 90.00 85.00 75.00 63.00 49.00 91.00
MIN 33.00 34.00 42.00 55.00 64.00 73.00 79.00 77.00 72.00 56.00 41.00 33.00 83.00
NO YRS 26 27 28 25 24 26 26 26 24 24 27 27 17