MANASSAS, VIRGINIA

Monthly Average Temperature (Degrees Fahrenheit)

(445213)

File last updated on May 16,
*** Note *** Provisional Data *** After Year/Month 198507
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
1895 ----- z ----- z ----- z ----- z ----- z 71.92 q 71.95 c 76.65 71.25 51.37 45.75 37.40 59.06
1896 33.40 36.90 39.98 57.57 69.24 71.60 77.44 75.37 68.42 53.85 51.02 35.61 55.87
1897 30.85 37.46 46.94 54.12 62.94 70.50 77.03 ----- z 68.83 a 58.00 46.68 38.10 53.77
1898 36.85 34.18 48.90 51.33 64.90 73.55 78.45 76.81 70.87 57.97 43.42 35.58 56.07
1899 33.13 27.27 43.19 55.05 65.24 74.57 78.24 75.53 66.63 57.97 44.92 36.50 54.85
1900 35.15 34.04 39.16 53.60 65.35 72.48 78.10 k 79.50 74.32 60.66 49.65 35.94 54.53
1901 36.52 i 30.48 46.21 50.70 62.56 72.83 79.87 74.79 e 66.55 56.29 45.83 33.87 56.36
1902 33.44 37.11 44.18 49.12 b 63.89 70.93 77.03 72.56 65.92 58.52 49.92 34.58 54.77
1903 32.37 27.61 49.55 53.20 63.60 67.37 75.89 72.26 66.28 56.42 ----- z ----- z 56.45
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 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1934 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1935 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1936 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1937 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1938 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1939 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1940 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1941 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
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 ----- z ----- z ----- z ----- z ----- z 9999.00
1949 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 9999.00
1950 ----- z ----- z ----- z ----- z ----- z ----- z 73.63 72.19 65.36 b 58.42 46.63 33.16 58.23
1951 37.92 38.12 44.85 d 54.10 62.90 71.33 76.00 73.56 68.25 59.81 42.07 38.53 55.62
1952 39.60 39.76 42.82 55.80 62.82 75.27 77.60 74.06 66.63 53.10 47.77 36.77 56.00
1953 39.97 41.41 45.81 54.73 68.73 72.43 77.05 74.45 67.23 58.35 46.28 38.98 57.12
1954 35.19 43.09 42.98 a 58.72 l 60.79 72.40 a 75.53 b 73.62 b 70.73 60.75 a 42.64 b 35.65 55.76
1955 33.03 b 36.12 46.23 c 58.07 65.43 b 67.70 79.61 74.27 65.68 b 54.05 41.98 d 31.69 e 54.49
1956 31.69 e 39.98 c 43.30 c 52.54 b 62.82 c 72.27 b 74.58 a 72.12 k 64.26 c 57.33 e 47.02 g 44.92 a 54.37
1957 32.37 40.41 45.06 58.75 66.32 74.73 77.40 74.34 71.17 53.19 47.58 39.40 56.73
1958 32.53 29.75 39.65 56.04 b 63.77 70.40 78.37 74.38 a 67.58 56.42 48.83 a 31.17 d 54.07
1959 34.29 b 37.52 c 44.90 58.72 a 68.50 73.58 76.08 77.60 b 69.11 l 59.38 a 44.29 a 39.08 e 55.81
1960 35.79 b 34.29 c 29.69 d ----- z 62.31 o 71.67 g 74.48 f 76.90 b 69.23 d 56.02 h 50.05 i 29.56 e 45.91
1961 27.27 c 37.34 c 47.75 a 51.73 d 61.77 72.66 a 76.81 e 76.33 a 74.61 c 58.48 d 51.17 a 35.88 b 55.98
1962 34.58 35.16 45.10 g 56.10 68.33 a 73.17 d 74.52 d 75.00 c 65.52 d 59.48 44.91 a 32.60 b 56.31
1963 ----- z 30.00 47.63 a 56.30 64.09 h 71.11 b 75.58 73.71 66.37 ----- z 49.03 j 29.93 b 56.33
1964 35.38 b 35.81 46.19 53.28 a 65.05 71.79 k 77.02 b 73.43 a 68.83 a 53.64 q 49.21 i 37.79 j 56.87
1965 35.08 37.41 42.39 c 54.26 a 69.90 e 71.32 76.55 75.37 70.71 d 56.66 48.88 39.42 e 56.50
1966 33.28 k 35.68 47.00 52.30 64.45 a 73.81 a 79.00 76.15 67.40 55.74 47.55 b 36.35 d 57.77
1967 40.23 a 31.53 l 45.20 a 55.40 i 58.85 a 71.70 75.82 73.77 66.00 f 56.98 d 44.12 39.13 a 56.20
1968 29.67 a 32.61 a 48.84 56.22 60.47 72.58 76.71 77.35 68.68 59.06 46.98 35.24 55.37
1969 31.77 35.16 40.94 57.23 66.27 74.53 76.78 b 73.05 67.62 57.35 45.82 33.23 54.98
1970 27.82 a 35.82 40.98 54.23 67.55 72.53 76.60 75.58 72.82 59.76 47.37 38.26 55.78
1971 37.02 37.07 42.37 52.82 61.79 73.37 75.76 74.31 72.00 g 63.19 r 47.50 m 42.52 e 55.22
1972 ----- z 33.69 b 43.92 52.37 63.15 d 69.37 75.09 h 76.12 f 68.67 53.66 40.65 40.37 51.76
1973 36.39 34.02 48.66 54.13 62.56 74.52 76.10 a 76.60 70.97 60.16 47.90 a 39.06 56.76
1974 40.85 36.75 47.90 a 56.52 b 65.68 70.20 77.21 75.87 68.60 55.83 a 45.22 j 40.29 57.79
1975 38.85 38.96 ----- z 51.45 68.29 73.83 77.55 ----- z ----- z ----- z ----- z ----- z 58.16
1976 ----- z ----- z ----- z ----- z 60.37 73.35 75.94 74.24 69.00 51.70 a 42.70 c ----- z 63.90
1977 25.42 37.13 b 51.50 b 56.52 67.68 a 71.90 79.89 i 77.73 71.85 ----- z 49.12 36.13 54.50
1978 ----- z 28.80 44.16 56.78 63.52 a 75.36 e 77.80 i 79.21 c 71.80 ----- z 50.52 41.21 56.82
1979 31.25 a 27.54 48.98 e 55.78 g 65.43 b 70.90 j 76.03 76.39 67.05 56.65 50.75 l 40.10 54.38
1980 33.63 32.50 b 43.88 j 58.50 66.42 g 70.79 a 79.07 b 79.52 73.93 b 57.00 44.11 g 36.98 57.99
1981 30.61 40.62 c 43.97 60.65 c 64.13 a 77.27 b ----- z 73.59 i 68.70 54.55 48.28 c ----- z 54.31
1982 28.27 ----- z 46.45 52.98 ----- z 70.83 77.19 71.74 66.57 ----- z ----- z ----- z 59.15
1983 ----- z ----- z ----- z 50.47 60.84 72.62 ----- z 80.02 j 70.59 h ----- z 48.25 l 33.65 k 61.31
1984 29.45 k 40.33 i 41.02 i 55.19 i 62.29 j ----- z ----- z 75.24 h ----- z 66.72 h 45.43 h ----- z 9999.00
1985 ----- z ----- z ----- z ----- z ----- z ----- z 77.62 a ----- z ----- z ----- z ----- z ----- z 77.62
Period of Record Statistics
MEAN 33.87 35.34 44.67 54.67 64.48 72.39 76.75 75.25 68.81 56.91 46.49 36.76 55.68
S.D. 3.82 4.02 3.94 2.70 2.77 2.02 1.58 2.00 2.64 2.52 2.82 3.46 0.88
SKEW -0.10 -0.42 -1.45 0.09 0.15 -0.27 -0.47 0.40 0.54 -0.52 -0.24 -0.10 -0.05
MAX 40.85 43.09 51.50 60.65 69.90 77.27 79.87 79.52 74.61 60.75 51.17 44.92 57.12
MIN 25.42 27.27 29.69 49.12 58.85 67.37 71.95 71.74 64.26 51.37 40.65 29.56 54.07
NO YRS 34 37 36 36 37 38 37 37 38 34 31 36 16