ROCK SPRINGS, WYOMING

Monthly Average Minimum Temperature (Degrees Fahrenheit)

(487840)

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 197905
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
1898 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 13.43 g 0.61 c 0.61
1899 8.05 j ----- z 17.61 26.93 a 32.06 32.83 39.90 a 35.42 33.31 a 17.06 8.45 a -3.67 j 27.06
1900 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1901 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 40.13 g 29.26 18.27 16.58 21.37
1902 10.10 a 16.68 17.45 26.83 a 34.32 45.27 42.00 43.35 34.30 25.74 12.97 ----- z 28.09
1903 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1904 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1905 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1906 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1907 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1908 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1909 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1910 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1911 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1912 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1913 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1914 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1915 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1916 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1917 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1918 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1919 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1920 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1921 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1922 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1923 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1924 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1925 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1926 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1927 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1928 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1929 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1930 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1931 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1932 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1933 9.13 a 2.57 19.94 24.97 32.42 46.37 52.06 46.58 39.70 30.97 21.50 20.45 28.89
1934 12.26 19.21 26.13 31.67 39.39 43.27 50.29 50.00 37.30 30.35 20.67 11.71 31.02
1935 11.58 14.50 19.16 27.80 34.87 45.33 50.90 49.10 39.67 26.26 16.00 8.74 28.66
1936 7.74 15.03 19.42 28.63 38.48 47.27 54.58 52.10 37.07 29.68 14.93 13.06 29.83
1937 -5.06 7.00 17.90 25.93 37.35 43.60 52.74 48.90 41.33 30.68 20.13 12.84 27.78
1938 11.39 11.82 19.84 28.87 36.77 46.20 47.52 46.65 42.90 31.97 14.57 16.06 29.55
1939 10.26 3.36 20.52 30.37 37.58 40.70 48.52 45.32 40.03 30.77 12.77 15.19 27.95
1940 6.35 13.14 25.52 30.50 36.77 45.17 49.29 48.55 42.20 30.71 13.17 13.13 29.54
1941 0.55 12.75 20.39 28.83 39.94 43.50 49.48 49.48 37.37 ----- z 20.90 10.19 28.49
1942 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1943 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1944 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1945 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1946 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1947 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1948 ----- z ----- z ----- z ----- z ----- z ----- z ----- z 49.23 42.00 27.00 18.37 8.74 29.07
1949 -5.29 8.00 24.23 32.40 40.35 46.30 51.16 49.29 41.03 29.90 26.97 12.68 29.75
1950 8.90 12.36 21.94 28.47 34.19 41.30 49.97 46.84 42.07 32.77 24.63 22.81 30.52
1951 13.32 f 19.57 19.84 29.07 38.94 41.90 50.77 50.00 40.07 31.97 a 15.87 12.23 31.84
1952 8.71 9.76 16.52 31.27 39.23 46.27 51.77 51.52 42.33 30.10 12.10 11.55 29.26
1953 24.19 19.14 22.61 26.10 33.52 45.23 54.84 51.29 41.77 30.90 24.53 17.61 32.65
1954 16.81 22.00 18.87 32.80 38.35 45.10 53.06 47.87 42.00 30.19 24.43 4.68 31.35
1955 7.71 11.75 17.39 26.30 37.45 44.67 51.00 51.94 39.43 30.19 18.70 19.94 29.71
1956 15.03 6.93 20.48 28.83 40.03 46.83 52.71 47.77 40.07 31.13 19.33 18.19 30.61
1957 3.81 23.50 24.35 29.47 38.61 46.27 51.65 50.55 36.13 32.42 18.90 15.26 30.91
1958 4.58 20.18 19.94 26.67 40.48 46.20 49.77 52.39 41.83 29.13 24.17 23.61 31.58
1959 12.61 15.29 24.03 29.80 36.48 47.77 51.35 49.42 41.83 32.48 23.00 13.45 31.46
1960 8.81 9.10 23.61 31.97 38.29 48.20 54.32 48.13 42.87 31.65 21.00 7.77 30.48
1961 9.39 20.04 23.39 29.23 38.39 49.60 52.58 52.48 37.80 29.90 18.03 12.84 31.14
1962 5.23 20.04 15.03 32.97 39.77 44.50 50.32 47.45 40.60 31.84 21.97 14.77 30.37
1963 6.97 21.64 20.32 28.60 39.84 45.30 52.13 51.00 43.80 35.32 23.03 16.16 32.01
1964 10.32 10.41 15.29 29.33 38.13 a 44.43 53.58 48.42 39.53 29.71 20.17 14.26 29.47
1965 16.58 18.14 13.48 32.00 36.77 45.27 53.00 49.32 35.77 32.39 25.83 13.32 30.99
1966 9.94 11.25 20.13 27.93 37.77 44.43 54.23 48.81 43.13 28.87 25.43 15.61 30.63
1967 19.68 19.18 23.77 26.90 36.65 45.27 52.52 50.48 43.57 34.32 20.00 7.90 31.69
1968 9.65 17.93 23.65 26.50 35.35 46.53 51.03 47.65 39.73 32.52 19.50 10.87 30.08
1969 17.39 10.07 14.03 30.90 41.26 43.27 51.10 53.39 43.70 27.35 20.57 14.23 30.60
1970 17.26 17.86 20.97 a 26.27 38.32 46.13 52.42 52.74 36.07 26.52 24.27 10.45 30.77
1971 20.29 18.00 19.94 27.30 36.32 44.10 49.00 52.00 36.43 28.84 15.43 6.87 29.54
1972 10.35 15.93 26.13 29.33 37.32 47.57 48.84 49.26 38.23 31.03 17.83 4.32 29.68
1973 -0.94 2.04 19.55 25.03 35.94 44.63 49.52 49.55 38.20 31.13 19.20 17.13 27.58
1974 7.68 13.36 25.58 28.13 36.58 46.83 52.32 45.58 35.20 30.06 20.97 12.45 29.56
1975 11.42 15.71 21.74 23.80 33.84 41.13 53.23 46.16 36.33 28.03 16.97 16.81 28.76
1976 13.81 12.97 19.32 28.33 37.50 a 40.53 51.11 d 46.84 41.47 28.16 21.93 15.00 29.75
1977 13.61 17.75 17.58 30.43 35.65 49.57 51.65 48.97 39.47 31.65 21.87 20.13 31.53
1978 16.06 17.89 25.87 30.10 34.97 44.37 51.00 f 47.10 b 38.28 a 30.29 15.87 5.26 27.82
1979 -2.29 13.50 23.26 27.93 31.73 p ----- z ----- z ----- z ----- z ----- z ----- z ----- z 15.60
Period of Record Statistics
MEAN 9.81 14.33 20.64 28.70 37.23 44.85 50.96 48.78 39.66 30.03 19.42 13.23 30.16
S.D. 6.52 5.38 3.33 2.24 2.24 2.87 2.91 3.07 2.76 2.89 4.16 4.96 1.19
SKEW -0.37 -0.54 -0.15 0.03 -0.43 -1.80 -2.00 -1.92 -0.42 -2.14 -0.42 -0.25 -0.25
MAX 24.19 23.50 26.13 32.97 41.26 49.60 54.84 53.39 43.80 35.32 26.97 23.61 32.65
MIN -5.29 2.04 13.48 23.80 32.06 32.83 39.90 35.42 33.31 17.06 8.45 0.61 27.58
NO YRS 40 41 42 42 41 41 40 42 42 42 43 42 36