UNIONVILLE, MARYLAND

Monthly Average Minimum Temperature (Degrees Fahrenheit)

(189030)

File last updated on May 16,
*** Note *** Provisional Data *** After Year/Month 199611
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
1940 ----- z ----- z ----- z ----- z ----- z ----- z 60.35 60.77 48.60 39.06 34.67 29.58 45.51
1941 22.71 21.36 23.84 39.17 44.10 56.50 63.03 56.39 52.60 46.35 31.20 29.00 40.52
1942 21.16 22.57 33.03 38.57 51.84 60.43 62.42 60.90 53.20 44.84 33.70 22.32 42.08
1943 24.23 23.29 29.03 33.53 51.29 64.03 61.97 59.00 48.13 40.90 30.03 21.06 40.54
1944 22.26 25.34 28.42 37.67 53.19 58.43 60.87 58.68 55.60 38.84 32.27 21.94 41.13
1945 16.94 21.68 35.87 a 40.48 a 45.00 56.83 62.61 57.97 58.50 38.65 34.57 20.00 40.76
1946 23.42 23.32 34.71 34.80 48.16 55.20 59.71 55.19 50.27 42.26 33.83 24.81 40.47
1947 26.84 17.79 ----- z 38.20 46.97 55.63 59.32 63.65 54.00 43.61 30.93 21.23 41.65
1948 ----- z ----- z ----- z ----- z ----- z ----- z ----- z 59.71 50.93 39.63 a 37.17 24.68 42.42
1949 29.71 28.68 31.03 35.07 47.58 58.57 67.03 61.71 49.69 a 47.29 30.79 a 25.45 42.72
1950 31.16 26.11 26.87 34.07 50.26 56.33 60.52 59.52 54.03 44.03 30.80 21.23 41.24
1951 24.03 24.14 31.00 37.57 45.74 56.53 60.52 57.65 49.80 44.10 28.33 23.39 40.23
1952 26.68 26.69 29.61 40.80 47.39 58.97 62.94 58.94 47.37 32.97 30.70 25.45 40.71
1953 26.13 26.25 32.84 40.00 55.19 57.37 61.19 57.92 e 51.33 39.29 28.63 25.42 41.80
1954 20.00 25.32 27.52 41.67 45.58 56.50 58.94 60.87 54.60 44.29 29.97 24.32 40.80
1955 20.26 21.43 31.23 42.00 49.61 52.57 65.65 65.77 54.53 41.84 29.27 18.71 41.07
1956 18.13 a 25.97 27.68 35.70 45.23 56.93 62.16 59.26 50.73 43.65 31.63 31.19 40.69
1957 18.58 28.25 29.61 42.00 47.55 61.00 59.29 56.90 56.50 38.97 33.07 27.90 41.64
1958 22.35 19.04 27.94 39.70 47.45 54.43 64.39 58.74 50.83 40.71 33.43 15.87 39.57
1959 17.68 22.11 26.77 40.60 51.45 57.10 63.65 64.55 55.93 47.71 31.70 27.19 42.20
1960 25.77 25.97 18.06 39.73 47.23 a 56.20 59.45 62.90 55.90 41.03 30.67 11.71 39.55
1961 10.52 21.82 31.71 35.80 45.65 56.80 62.74 61.55 58.03 41.13 36.20 20.77 40.23
1962 19.16 21.54 26.06 37.70 51.84 57.93 59.06 58.39 49.43 40.59 d 29.27 16.19 38.93
1963 15.10 15.32 30.74 36.53 44.97 56.30 59.28 b 57.23 47.40 38.32 34.67 16.87 37.73
1964 18.71 19.21 28.65 37.83 46.07 a 56.63 62.39 57.53 a 49.77 35.97 a 30.97 26.06 39.15
1965 16.29 21.61 27.23 36.67 51.03 54.57 59.94 59.42 56.47 38.94 32.30 26.52 40.08
1966 18.90 20.79 29.97 35.80 47.52 55.67 61.94 60.81 51.10 39.35 32.20 22.48 39.71
1967 26.03 16.81 b 29.65 38.27 42.81 56.00 62.16 60.71 48.60 39.19 28.33 24.71 39.44
1968 14.42 18.07 31.32 37.60 44.74 56.57 62.29 62.06 51.17 45.42 35.53 22.55 40.15
1969 20.39 22.61 26.13 39.47 48.68 59.83 63.61 59.03 52.03 37.68 30.33 22.65 40.20
1970 11.94 21.07 25.90 38.13 50.39 58.20 62.42 60.35 55.27 47.10 35.10 24.58 40.87
1971 16.16 25.32 27.52 32.13 45.45 59.07 59.35 59.10 59.07 50.90 32.07 30.52 41.39
1972 24.58 19.86 29.71 35.07 48.39 55.87 63.26 58.84 55.93 38.71 30.47 30.65 40.94
1973 22.10 21.36 36.65 40.27 47.45 61.27 62.61 62.84 55.47 42.90 33.90 26.97 42.81
1974 27.55 21.86 32.58 39.07 48.97 55.53 60.74 61.48 52.27 36.16 31.67 27.06 41.24
1975 25.10 25.79 30.35 35.80 52.03 59.03 61.45 61.06 50.80 45.03 35.63 24.77 42.24
1976 19.58 26.14 33.68 37.83 46.71 59.70 60.03 56.13 48.97 39.94 24.83 17.81 39.28
1977 ----- z 20.00 a 33.45 37.63 48.61 54.60 61.16 61.58 55.00 38.97 38.17 23.19 42.94
1978 16.68 10.36 26.94 37.30 47.90 56.40 61.06 64.39 54.20 38.13 33.43 25.23 39.33
1979 21.94 9.43 30.90 39.00 50.48 55.43 61.03 61.58 54.52 a 42.03 36.93 26.48 40.81
1980 20.26 17.93 28.77 40.40 49.94 52.73 61.00 60.74 52.73 37.84 29.30 21.52 39.43
1981 13.79 b 25.54 26.71 42.00 46.19 59.27 61.74 56.65 52.07 38.03 32.43 23.00 39.78
1982 14.45 24.18 29.06 34.27 48.90 56.93 62.35 56.94 52.40 41.48 34.10 30.58 40.47
1983 22.52 18.86 33.77 38.30 45.81 56.45 a 58.26 60.52 49.13 43.13 32.90 22.71 40.20
1984 14.26 28.48 26.10 38.37 47.29 56.27 61.48 60.32 48.13 47.94 28.63 31.06 40.69
1985 17.90 22.82 29.26 38.43 47.35 53.97 59.00 58.06 49.37 41.19 37.07 19.58 39.50
1986 16.26 18.52 a 25.58 36.40 47.26 54.87 58.81 55.35 52.67 40.16 28.52 a 22.61 38.08
1987 17.65 17.29 25.10 35.87 46.42 55.30 61.35 56.23 54.33 32.87 29.50 25.42 38.11
1988 13.19 22.28 28.23 35.70 47.42 54.77 62.58 59.26 45.14 a 32.74 29.30 18.97 37.46
1989 21.55 20.32 30.23 35.93 47.77 61.73 64.00 62.03 54.70 41.61 31.07 10.90 40.15
1990 28.65 28.39 32.77 39.57 48.48 56.73 63.61 60.81 52.47 45.52 32.23 27.81 43.09
1991 22.55 26.32 33.19 39.90 53.84 56.77 65.29 61.68 53.03 41.35 31.80 27.03 42.73
1992 22.81 25.52 29.26 38.70 45.23 54.77 64.26 58.00 54.00 38.52 35.57 26.90 41.13
1993 27.03 19.64 27.87 38.13 49.16 56.77 63.61 61.23 55.57 40.71 32.76 m 20.32 41.82
1994 11.19 17.57 26.26 39.13 42.10 58.60 64.45 59.00 51.52 a 38.23 35.17 28.10 39.28
1995 27.23 19.18 30.90 35.53 46.52 58.00 65.19 62.55 51.63 43.29 29.37 22.29 40.97
1996 18.94 22.97 25.74 39.93 47.52 59.93 61.58 59.52 55.13 42.77 28.63 ----- z 42.06
Period of Record Statistics
MEAN 20.62 22.00 29.31 37.92 47.96 57.07 61.81 59.82 52.50 41.12 32.05 23.70 40.46
S.D. 4.95 4.09 3.29 2.28 2.67 2.24 1.96 2.34 3.05 3.74 2.77 4.49 1.27
SKEW -0.01 -0.74 -0.36 -0.24 0.46 0.66 0.29 0.19 -0.06 0.10 0.13 -0.63 -0.09
MAX 31.16 28.68 36.65 42.00 55.19 64.03 67.03 65.77 59.07 50.90 38.17 31.19 43.09
MIN 10.52 9.43 18.06 32.13 42.10 52.57 58.26 55.19 45.14 32.74 24.83 10.90 37.46
NO YRS 54 55 54 55 55 55 56 57 57 57 56 56 51