DALECARLIA RESVR DC, MARYLAND

Monthly Average Minimum Temperature (Degrees Fahrenheit)

(182325)

File last updated on May 16,
*** Note *** Provisional Data *** After Year/Month 201205
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
1948 ----- z ----- z ----- z ----- z ----- z ----- z ----- z 64.19 56.22 c 45.20 a 40.33 c 29.00 f 51.49
1949 32.21 b 35.90 g 34.70 a 39.93 c 52.74 h 63.55 a 70.14 b 65.34 b 54.04 d 52.90 a 34.69 d 29.57 c 47.71
1950 35.41 d 30.20 c 27.38 g 39.32 b 53.23 60.41 a 65.84 63.71 58.30 51.41 b 38.79 a 28.61 c 47.75
1951 27.87 27.70 a 34.06 42.27 51.59 b 61.60 67.13 a 63.33 d 57.66 a 49.32 32.83 28.97 a 45.36
1952 31.27 a 30.55 33.10 44.72 a 52.77 63.38 a 68.58 64.93 a 56.43 41.65 39.17 30.58 46.43
1953 31.97 31.04 35.81 44.00 58.53 a 62.38 a 66.39 63.29 56.93 45.80 a 33.87 29.06 46.59
1954 24.74 30.25 32.84 46.97 50.23 a 61.97 63.77 64.29 59.43 49.23 34.03 28.10 45.49
1955 25.42 25.96 35.52 46.67 55.17 a 58.33 70.87 68.55 59.80 46.90 32.93 23.16 45.77
1956 24.90 30.69 32.26 41.83 50.25 c 61.03 66.37 a 64.52 56.27 49.39 37.43 35.16 45.84
1957 24.26 32.54 34.45 46.70 54.26 64.87 65.10 a 61.94 61.30 42.68 37.43 30.55 46.34
1958 24.32 20.93 a 32.19 43.30 51.71 58.45 a 66.94 62.90 56.07 45.06 36.30 21.39 43.30
1959 22.23 25.50 31.71 44.47 56.10 61.40 67.61 68.87 59.60 50.13 35.10 30.71 46.12
1960 28.35 28.07 23.42 45.87 51.58 61.20 64.35 67.26 60.97 46.94 37.37 18.58 44.50
1961 17.28 b 28.25 35.42 38.93 49.28 b 61.39 b 67.10 a 66.29 63.50 45.87 40.82 b 27.06 45.10
1962 24.90 26.00 32.13 43.30 56.48 62.80 63.81 64.23 55.23 48.27 a 34.00 22.81 44.50
1963 20.71 19.46 34.97 42.80 51.52 60.50 64.60 a 62.65 54.23 45.68 40.20 20.81 43.18
1964 23.68 25.72 34.16 ----- z 52.77 61.83 a 67.68 63.55 56.33 41.74 ----- z 32.38 b 45.98
1965 23.97 26.32 31.84 40.65 g 56.52 58.87 65.52 63.58 60.13 42.71 34.33 29.06 44.80
1966 21.80 a 24.18 33.77 39.97 51.10 59.90 65.29 63.19 54.57 42.90 36.33 26.74 43.31
1967 28.06 22.21 33.03 43.38 a 46.71 60.20 65.71 64.81 54.27 43.94 31.07 27.48 43.41
1968 18.39 20.52 35.23 42.47 48.61 59.40 67.29 66.84 57.43 48.61 38.70 24.85 d 44.03
1969 24.55 27.36 29.26 45.00 54.29 64.17 a 68.19 64.97 57.63 44.13 ----- z 25.10 45.88
1970 17.10 24.82 30.90 42.53 54.68 62.27 67.00 66.19 60.63 50.74 37.80 28.94 45.30
1971 20.45 28.18 31.74 38.87 50.81 63.10 65.23 63.26 62.20 53.16 36.47 36.35 45.82
1972 29.87 25.00 35.35 41.10 53.32 59.57 67.16 64.06 59.53 43.61 34.57 32.68 45.49
1973 26.39 25.36 40.16 43.93 51.16 64.77 66.63 a 67.39 59.77 47.65 38.83 30.58 46.88
1974 31.45 25.54 35.65 44.93 52.87 58.54 d 64.68 65.97 a 56.50 b 40.26 35.69 a 31.97 45.34
1975 27.57 c 28.96 34.29 40.52 a 56.29 63.07 66.31 b 66.48 56.47 49.23 40.07 28.81 46.51
1976 22.77 32.00 36.11 d 41.82 b 50.71 63.50 63.94 62.97 a 56.00 43.13 29.90 24.07 a 43.91
1977 14.61 23.64 35.59 d 44.00 54.53 a 57.90 a 66.52 b 66.39 60.45 a 43.94 41.20 26.53 a 44.61
1978 22.20 a ----- z ----- z ----- z 53.17 a 60.87 65.68 69.48 60.03 43.45 38.61 b 28.80 a 49.14
1979 23.00 16.64 34.13 43.70 54.58 58.43 65.45 65.45 58.33 44.87 40.37 29.32 44.52
1980 26.29 22.97 31.97 44.53 53.68 58.73 67.03 66.90 60.37 42.97 33.03 a 25.45 44.49
1981 19.45 28.59 a 30.13 a 46.13 50.58 63.97 66.16 60.77 55.83 42.35 34.33 26.97 43.77
1982 17.06 28.21 33.61 38.33 55.23 60.66 a 66.87 61.81 55.93 44.87 37.43 33.30 a 44.44
1983 27.32 26.39 38.77 42.50 51.52 62.07 65.16 66.29 57.43 47.74 37.57 24.77 45.63
1984 20.81 31.28 28.52 42.89 k 51.77 63.93 b 65.94 65.39 55.10 a 53.10 ----- z 32.45 46.83
1985 19.45 25.82 34.29 46.50 56.32 61.90 67.10 68.03 59.30 50.84 43.17 24.19 46.41
1986 23.87 a 25.36 33.42 42.70 51.74 62.10 a 69.06 63.32 61.47 46.48 33.47 26.68 44.97
1987 25.94 28.75 34.55 43.10 54.10 64.20 69.85 d 67.00 62.13 38.65 35.73 29.19 46.10
1988 16.71 24.52 31.73 a 39.10 51.03 58.17 64.73 a 67.10 54.07 37.65 34.27 24.13 41.93
1989 24.35 25.04 28.87 a 37.27 47.45 62.27 63.26 61.10 56.10 42.06 30.57 11.87 40.85
1990 26.19 27.25 32.77 39.00 46.71 56.00 62.35 59.26 52.50 43.03 31.97 25.81 41.90
1991 20.71 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 20.71
1992 19.94 ----- z ----- z ----- z 41.94 50.10 58.90 ----- z 48.70 33.74 28.97 ----- z 40.33
1993 ----- z 22.50 31.55 ----- z 51.10 59.77 69.29 65.23 57.53 42.45 33.10 27.13 45.96
1994 18.06 22.25 29.23 46.47 46.45 63.23 ----- z 63.29 53.27 42.52 38.87 32.00 41.42
1995 29.58 21.64 35.52 40.37 50.71 ----- z 68.26 65.65 57.60 45.35 31.23 24.19 42.74
1996 20.19 26.00 28.87 43.40 51.77 61.57 63.26 63.10 59.30 45.00 32.97 31.24 b 43.89
1997 26.35 31.36 36.87 41.00 47.55 59.03 63.90 66.29 58.87 46.42 36.53 30.13 45.36
1998 33.16 35.04 36.39 44.93 56.68 62.47 66.71 66.84 65.10 47.87 38.53 34.84 49.05
1999 27.90 a 30.43 32.29 45.10 a 53.55 62.77 70.35 e 68.84 57.90 a 45.65 42.47 30.77 47.33
2000 26.19 30.41 37.42 45.33 56.45 64.50 ----- z 66.39 59.34 a 47.42 36.03 22.74 44.75
2001 23.94 30.82 31.39 45.43 53.26 63.07 64.23 68.61 56.93 44.32 40.03 34.52 46.38
2002 30.23 30.64 36.48 46.90 52.48 64.37 70.16 68.84 60.47 49.35 37.27 26.90 47.84
2003 22.00 24.25 35.10 41.77 ----- z ----- z 67.00 69.74 60.13 44.77 39.60 27.71 43.21
2004 20.87 25.52 36.26 ----- z 61.61 62.90 68.77 63.50 a 61.10 48.39 38.33 27.94 46.84
2005 24.67 a 25.93 27.97 41.03 46.23 63.47 70.32 68.23 62.73 50.29 37.50 26.26 45.38
2006 31.32 27.82 36.42 46.57 52.90 63.17 70.58 68.52 57.57 45.74 39.53 32.81 47.75
2007 31.81 20.14 32.32 40.47 53.29 62.63 63.48 65.68 57.57 52.29 37.27 30.23 45.60
2008 25.06 27.62 34.06 45.53 48.23 62.23 66.03 63.77 60.67 44.45 36.10 29.00 45.23
2009 21.61 27.21 33.32 43.80 54.90 63.07 66.16 69.19 60.20 45.23 40.97 27.16 46.07
2010 25.16 25.14 39.13 46.83 55.90 68.03 70.35 68.23 60.30 47.68 35.80 25.68 47.35
2011 23.58 28.25 34.90 47.33 58.39 66.07 71.19 66.58 62.27 46.61 39.07 33.06 48.11
2012 28.39 32.28 43.13 43.80 56.60 u ----- z ----- z ----- z ----- z ----- z ----- z ----- z 36.90
Period of Record Statistics
MEAN 24.60 26.72 33.68 43.19 52.47 61.60 66.56 65.39 58.16 45.81 36.52 28.00 45.28
S.D. 4.57 3.64 3.17 2.63 3.46 2.71 2.40 2.37 2.94 3.76 3.22 4.26 1.64
SKEW 0.11 -0.29 -0.16 -0.32 -0.30 -1.22 -0.20 -0.15 -0.36 -0.31 -0.25 -0.86 -0.32
MAX 35.41 35.04 43.13 47.33 61.61 68.03 71.19 69.74 65.10 53.16 43.17 36.35 49.05
MIN 14.61 16.64 23.42 37.27 41.94 50.10 58.90 59.26 48.70 33.74 28.97 11.87 40.85
NO YRS 63 60 60 56 60 60 60 62 63 63 60 61 48