DALECARLIA RESVR DC, MARYLAND

Monthly Average 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 75.23 68.65 c 55.30 a 50.89 c 39.34 f 62.52
1949 42.66 b 46.12 g 46.18 a 53.37 d 65.75 i 74.38 a 80.41 b 75.90 b 66.04 d 63.03 a 47.38 d 39.59 c 58.89
1950 46.92 e 38.44 d 39.78 k 52.85 c 63.79 72.00 a 74.95 73.55 66.32 60.83 b 49.05 a 35.46 c 57.65
1951 38.32 38.28 a 45.00 54.13 64.36 c 72.82 77.85 a 75.85 e 69.17 a 60.02 43.37 39.72 b 56.57
1952 40.98 b 39.98 43.55 55.84 a 64.10 75.93 a 79.80 a 75.45 a 68.17 54.89 49.03 37.98 57.14
1953 40.77 41.84 46.69 55.22 69.53 a 73.50 a 78.31 75.21 68.45 58.55 a 46.71 a 40.16 57.91
1954 35.45 42.71 43.85 59.23 61.38 a 73.43 76.63 74.16 71.18 59.95 43.03 36.11 56.43
1955 33.63 36.68 46.79 58.60 67.27 a 69.10 81.43 a 78.18 a 69.03 58.19 44.02 31.98 56.24
1956 32.79 39.93 43.10 53.48 63.65 e 72.85 75.95 a 74.66 66.52 58.69 46.78 44.26 56.06
1957 32.44 40.84 44.66 59.48 67.11 76.02 77.65 a 74.76 70.97 53.29 47.42 39.53 57.01
1958 32.40 29.91 a 40.35 55.22 63.60 69.76 a 77.35 74.13 67.62 56.90 48.00 30.92 53.85
1959 33.27 37.41 44.92 57.97 68.19 73.20 77.29 78.69 70.80 60.42 45.23 39.76 57.26
1960 36.53 36.78 33.56 59.68 63.11 72.53 75.29 77.19 69.68 57.37 49.08 29.73 55.05
1961 27.57 b 38.41 46.85 50.47 60.21 b 72.36 b 76.90 a 75.52 73.43 58.00 49.98 b 35.40 55.42
1962 34.39 34.41 42.71 55.32 70.31 j 73.00 74.21 74.84 64.53 59.17 a 43.45 32.13 53.47
1963 30.82 29.89 48.00 55.78 63.77 72.37 75.75 e 74.00 65.27 59.39 49.97 29.71 54.56
1964 34.87 34.97 46.21 ----- z 65.84 74.50 a 77.94 74.26 68.75 54.29 ----- z 40.57 b 57.22
1965 33.68 37.52 42.65 52.35 g 69.69 71.35 76.58 74.90 71.13 55.24 46.38 39.71 56.26
1966 30.98 a 34.64 46.94 51.22 64.16 73.43 78.10 75.74 63.92 q 56.02 47.80 36.15 54.11
1967 39.13 33.70 44.05 57.12 a 59.34 72.90 75.82 74.74 66.15 56.37 42.50 37.61 54.95
1968 29.73 32.36 49.11 56.22 60.31 d 68.64 w 78.00 k 77.82 69.58 59.32 49.00 35.11 d 51.86
1969 33.08 35.43 41.37 58.32 66.71 74.95 a 77.60 75.39 69.03 57.23 ----- z 33.68 56.62
1970 28.00 36.29 41.23 55.25 67.98 73.88 77.48 76.95 72.88 60.95 47.28 38.39 56.38
1971 30.47 38.73 43.13 54.45 63.06 75.05 76.27 74.53 71.90 63.32 47.08 46.42 57.04
1972 38.84 35.41 45.82 54.77 64.97 70.52 77.24 74.85 70.47 54.89 44.83 41.95 56.21
1973 37.53 36.46 50.65 55.23 61.50 h 75.82 s 77.82 a 77.89 71.37 60.55 50.07 39.27 55.68
1974 40.98 37.30 47.60 58.48 64.74 69.56 d 76.31 76.07 a 68.07 b 54.92 47.53 a 41.34 56.91
1975 38.38 c 38.57 44.16 51.16 a 67.76 73.58 76.53 b 77.58 65.78 61.55 51.90 38.05 57.08
1976 31.56 45.53 49.61 d 56.38 b 63.00 74.83 75.39 74.17 a 68.21 a 53.45 41.65 33.60 a 55.62
1977 23.79 36.80 48.85 d 58.34 a 67.67 a 70.17 a 78.86 c 77.05 71.79 a 55.87 49.15 35.90 a 56.19
1978 30.25 a ----- z ----- z ----- z 64.12 a 72.63 76.11 78.82 69.98 55.69 48.80 b 40.08 a 59.61
1979 32.39 25.88 48.05 54.48 66.13 70.28 75.35 75.76 68.60 56.05 51.08 39.81 55.32
1980 34.11 32.71 43.61 56.52 66.61 71.35 79.00 78.69 72.90 55.94 43.81 a 36.26 55.96
1981 29.47 40.31 a 42.52 a 59.63 63.24 75.03 76.69 73.02 67.18 54.48 a 45.92 35.26 55.23
1982 27.29 37.66 44.92 52.35 67.44 70.81 a 77.52 72.87 67.58 57.16 49.37 43.45 a 55.70
1983 35.82 36.98 48.31 53.10 63.48 73.98 77.79 78.45 70.05 58.66 48.88 33.15 56.56
1984 30.39 41.83 39.23 54.50 k 64.00 75.18 b 75.66 76.13 67.12 a 63.55 ----- z 44.82 57.79
1985 29.82 37.07 47.02 60.62 67.92 72.57 78.13 77.35 71.37 61.19 53.02 34.92 57.58
1986 34.68 a 34.18 46.66 55.70 66.29 75.48 a 80.34 74.24 70.92 59.19 44.45 37.13 56.61
1987 34.29 37.61 47.85 54.58 67.61 76.18 81.31 d 78.39 71.97 52.87 48.70 39.23 57.55
1988 28.79 36.07 45.25 a 53.03 64.06 72.48 78.88 a 78.87 66.88 51.19 46.48 36.35 54.86
1989 36.13 36.62 42.38 a 52.17 61.19 73.95 75.39 73.27 68.20 56.89 44.05 24.06 53.69
1990 39.89 42.41 47.89 53.97 60.98 71.55 76.00 72.40 66.03 58.00 47.57 40.05 56.39
1991 33.77 ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z ----- z 33.77
1992 33.35 ----- z ----- z ----- z 58.31 66.22 73.85 ----- z 64.00 50.89 43.15 ----- z 55.68
1993 ----- z 33.71 41.92 ----- z 65.42 73.12 80.84 77.34 69.42 55.66 45.98 36.02 57.94
1994 27.39 34.61 42.73 61.35 60.90 76.43 ----- z 74.55 66.83 56.32 51.48 42.42 54.09
1995 38.26 33.11 48.03 55.98 64.03 ----- z 79.50 78.45 69.35 59.34 42.52 33.77 54.76
1996 30.69 36.02 41.26 56.92 63.19 74.32 75.00 74.69 69.23 57.71 42.35 40.28 b 55.14
1997 36.00 42.84 47.97 53.75 62.16 71.63 76.90 75.87 69.42 57.89 44.92 39.45 56.57
1998 42.15 43.21 47.31 58.27 67.94 73.33 78.69 79.19 76.42 59.40 49.72 44.05 59.97
1999 38.23 a 40.59 43.89 57.81 a 66.44 74.20 82.42 e 79.90 68.95 a 57.23 53.82 40.85 58.69
2000 36.10 42.62 50.85 56.28 68.82 75.75 ----- z 75.89 69.71 a 60.10 46.15 31.24 55.77
2001 33.58 41.30 42.66 58.55 65.69 74.63 75.03 78.66 68.65 58.47 53.53 44.81 57.96
2002 41.00 43.55 48.69 59.68 65.89 76.55 81.37 80.32 71.82 58.42 46.40 35.87 59.13
2003 30.21 32.41 47.74 55.18 ----- z ----- z 77.56 79.00 70.15 56.42 51.15 37.47 53.73
2004 30.18 35.95 48.34 ----- z 73.00 74.15 78.53 74.70 a 71.03 58.19 49.92 38.71 57.52
2005 34.77 a 38.04 38.87 54.58 58.94 74.80 80.11 78.65 74.33 59.76 49.45 35.35 56.47
2006 41.90 38.02 46.84 59.08 64.31 74.12 80.89 79.90 67.17 56.45 49.53 44.08 58.52
2007 40.24 29.25 45.40 51.27 66.27 74.57 76.61 78.19 70.97 64.55 47.48 39.15 57.00
2008 35.71 37.86 45.94 56.63 61.02 75.53 77.74 74.40 70.23 55.79 44.97 38.19 56.17
2009 29.69 37.38 43.08 55.52 63.65 71.72 76.34 78.60 69.23 54.92 49.83 35.11 55.42
2010 33.24 31.84 48.02 59.07 66.89 78.35 81.42 77.84 72.03 58.08 45.85 31.85 57.04
2011 30.65 37.34 45.65 59.40 67.98 75.85 81.58 76.95 69.83 55.31 49.93 41.82 a 57.69
2012 37.90 41.64 54.32 55.65 66.50 u ----- z ----- z ----- z ----- z ----- z ----- z ----- z 47.38
Period of Record Statistics
MEAN 34.42 37.16 45.35 55.98 64.81 73.36 77.70 76.30 69.33 57.61 47.48 37.63 56.48
S.D. 4.59 3.88 3.38 2.64 2.95 2.17 2.08 2.02 2.41 2.83 2.97 4.30 1.31
SKEW 0.28 -0.34 -0.53 -0.06 0.01 -0.60 0.47 0.14 0.22 0.10 -0.03 -0.43 0.27
MAX 46.92 45.53 54.32 61.35 73.00 78.35 82.42 80.32 76.42 64.55 53.82 46.42 59.97
MIN 23.79 25.88 33.56 50.47 58.31 66.22 73.85 72.40 64.00 50.89 41.65 24.06 53.69
NO YRS 63 60 60 56 58 58 59 62 62 63 60 61 44