ROCK SPRINGS, WYOMING

Monthly Extreme 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 -10.00 g -18.00 c -18.00
1899 -10.00 j ----- z -3.00 11.00 a 22.00 12.00 28.00 a 23.00 20.00 a 3.00 0.00 a -30.00 j -30.00
1900 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1901 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 19.00 g 18.00 7.00 -6.00 -6.00
1902 0.00 a 0.00 -6.00 11.00 a 25.00 31.00 33.00 36.00 24.00 19.00 6.00 ----- z -6.00
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 -9.00 a -25.00 9.00 10.00 21.00 36.00 42.00 31.00 29.00 22.00 2.00 5.00 -25.00
1934 -5.00 6.00 8.00 17.00 24.00 29.00 38.00 39.00 18.00 22.00 1.00 -2.00 -5.00
1935 -5.00 -8.00 7.00 19.00 22.00 36.00 41.00 40.00 16.00 3.00 -6.00 -12.00 -12.00
1936 -20.00 -16.00 -3.00 -5.00 28.00 33.00 45.00 39.00 23.00 20.00 4.00 -3.00 -20.00
1937 -24.00 -15.00 8.00 15.00 28.00 31.00 47.00 38.00 18.00 21.00 4.00 -4.00 -24.00
1938 -5.00 -10.00 3.00 7.00 21.00 35.00 40.00 31.00 31.00 18.00 -2.00 -2.00 -10.00
1939 -5.00 -19.00 -9.00 4.00 23.00 32.00 35.00 35.00 25.00 21.00 0.00 -9.00 -19.00
1940 -29.00 -14.00 11.00 16.00 27.00 31.00 44.00 37.00 33.00 23.00 -21.00 -13.00 -29.00
1941 -22.00 -14.00 4.00 18.00 31.00 34.00 35.00 32.00 21.00 ----- z 6.00 -23.00 -23.00
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 41.00 34.00 11.00 -4.00 -17.00 -17.00
1949 -29.00 -21.00 17.00 18.00 32.00 35.00 40.00 40.00 28.00 20.00 13.00 -6.00 -29.00
1950 -12.00 -15.00 8.00 10.00 24.00 31.00 39.00 39.00 26.00 23.00 -12.00 -11.00 -15.00
1951 -10.00 f -20.00 7.00 15.00 27.00 26.00 41.00 37.00 26.00 22.00 a -3.00 -17.00 -20.00
1952 -17.00 -10.00 2.00 19.00 29.00 38.00 41.00 42.00 27.00 21.00 -12.00 -18.00 -18.00
1953 6.00 -4.00 9.00 12.00 22.00 33.00 46.00 44.00 30.00 20.00 -8.00 -3.00 -8.00
1954 1.00 8.00 -7.00 21.00 21.00 31.00 39.00 37.00 29.00 11.00 2.00 -12.00 -12.00
1955 -16.00 -9.00 -5.00 4.00 25.00 30.00 37.00 39.00 28.00 19.00 -11.00 -7.00 -16.00
1956 -16.00 -24.00 -3.00 19.00 26.00 36.00 42.00 35.00 25.00 19.00 3.00 -22.00 -24.00
1957 -20.00 2.00 12.00 22.00 30.00 33.00 42.00 38.00 24.00 16.00 -8.00 -2.00 -20.00
1958 -15.00 -1.00 4.00 16.00 24.00 34.00 41.00 44.00 26.00 10.00 -8.00 5.00 -15.00
1959 -14.00 -11.00 11.00 16.00 21.00 32.00 37.00 40.00 24.00 17.00 -4.00 -12.00 -14.00
1960 -29.00 -21.00 -10.00 16.00 32.00 33.00 43.00 35.00 33.00 15.00 2.00 -14.00 -29.00
1961 -19.00 -5.00 13.00 16.00 27.00 37.00 44.00 44.00 28.00 16.00 5.00 -15.00 -19.00
1962 -29.00 -11.00 -9.00 25.00 27.00 32.00 42.00 30.00 22.00 21.00 12.00 -19.00 -29.00
1963 -37.00 -1.00 5.00 19.00 29.00 38.00 43.00 40.00 35.00 21.00 7.00 -2.00 -37.00
1964 -16.00 -8.00 -7.00 18.00 22.00 a 37.00 45.00 30.00 24.00 17.00 9.00 -19.00 -19.00
1965 -7.00 -5.00 -10.00 20.00 22.00 37.00 45.00 38.00 1.00 21.00 7.00 -8.00 -10.00
1966 -4.00 -5.00 -8.00 7.00 26.00 33.00 45.00 35.00 35.00 12.00 11.00 -3.00 -8.00
1967 -2.00 5.00 4.00 18.00 17.00 40.00 45.00 43.00 31.00 20.00 -1.00 -8.00 -8.00
1968 -11.00 -13.00 6.00 17.00 26.00 34.00 35.00 35.00 27.00 16.00 3.00 -8.00 -13.00
1969 0.00 -9.00 -11.00 25.00 31.00 31.00 43.00 41.00 35.00 8.00 3.00 -11.00 -11.00
1970 -17.00 7.00 6.00 a 14.00 21.00 34.00 41.00 40.00 22.00 15.00 0.00 -11.00 -17.00
1971 -13.00 -2.00 -2.00 15.00 27.00 33.00 40.00 44.00 19.00 6.00 -2.00 -12.00 -13.00
1972 -14.00 -21.00 12.00 19.00 21.00 35.00 35.00 40.00 25.00 5.00 -1.00 -33.00 -33.00
1973 -29.00 -20.00 8.00 3.00 26.00 29.00 40.00 38.00 28.00 17.00 -1.00 1.00 -29.00
1974 -27.00 -3.00 7.00 18.00 26.00 31.00 43.00 33.00 27.00 18.00 3.00 -11.00 -27.00
1975 -13.00 -2.00 1.00 8.00 25.00 31.00 42.00 34.00 24.00 10.00 -5.00 -3.00 -13.00
1976 -14.00 -14.00 5.00 16.00 25.00 a 28.00 40.00 d 38.00 28.00 13.00 -10.00 -2.00 -14.00
1977 -13.00 2.00 8.00 14.00 26.00 42.00 44.00 37.00 26.00 18.00 -8.00 -5.00 -13.00
1978 -9.00 -8.00 5.00 22.00 25.00 36.00 41.00 f 35.00 b 22.00 a 16.00 -5.00 -31.00 -31.00
1979 -32.00 -17.00 10.00 16.00 25.00 p ----- z ----- z ----- z ----- z ----- z ----- z ----- z -32.00
Period of Record Statistics
MEAN -14.77 -9.05 2.79 14.79 25.22 32.93 40.70 37.31 25.64 16.29 -0.51 -10.07 -18.25
S.D. 10.27 8.90 7.55 6.15 3.47 4.67 3.98 4.42 6.15 5.49 7.19 8.47 8.06
SKEW -0.16 0.11 -0.38 -1.02 0.07 -2.02 -1.00 -0.81 -1.40 -0.99 -0.42 -0.63 -0.50
MAX 6.00 8.00 17.00 25.00 32.00 42.00 47.00 44.00 35.00 23.00 13.00 5.00 -5.00
MIN -37.00 -25.00 -11.00 -5.00 17.00 12.00 28.00 23.00 1.00 3.00 -21.00 -33.00 -37.00
NO YRS 40 41 42 42 41 41 40 42 42 42 43 42 36