NATIONAL ARBORETUM DC, MARYLAND

Period of Record General Climate Summary - Temperature

From Year=1948 To Year=2012
Station:(186350) NATIONAL ARBORETUM DC
Averages Daily Extremes
Monthly Averages Daily Extremes Monthly Extremes Max. Temp. Min. Temp.
Max. Min. Mean High Date Low Date Highest
Mean
Year Lowest
Mean
Year >=
90 F
<=
32 F
<=
32 F
<=
0 F
F F F F dd/yyyy
or
yyyymmdd
F dd/yyyy
or
yyyymmdd
F - F - # Days # Days # Days # Days
January 43.8 25.4 34.4 80 26/1950 -10 17/1982 43.6 49 23.8 77 0.0 4.6 24.2 0.2
February 47.0 27.5 37.3 82 26/2000 -1 02/1961 44.7 54 24.5 79 0.0 2.3 20.1 0.0
March 56.2 34.8 45.6 90 31/1998 9 02/1962 55.8 112 35.3 60 0.0 0.3 12.6 0.0
April 67.4 44.1 55.7 94 28/1957 18 08/1982 61.5 60 50.5 75 0.6 0.0 2.0 0.0
May 76.5 53.5 65.0 98 31/1991 25 05/1966 71.8 91 59.6 67 1.9 0.0 0.0 0.0
June 84.8 62.7 73.7 102 10/2011 42 01/1984 79.1 110 69.4 79 8.0 0.0 0.0 0.0
July 88.8 67.5 78.1 106 30/2011 47 01/1988 83.4 111 74.5 84 13.9 0.0 0.0 0.0
August 87.4 65.8 76.6 104 18/1997 42 29/1982 80.3 59 72.2 86 11.4 0.0 0.0 0.0
September 80.7 58.4 69.5 102 01/1953 34 28/1989 75.2 61 64.6 88 3.9 0.0 0.0 0.0
October 69.6 46.3 57.9 94 05/1951 20 31/1966 64.9 107 50.4 88 0.2 0.0 1.6 0.0
November 58.8 37.6 48.2 87 01/1950 10 22/1987 52.7 103 41.2 96 0.0 0.0 9.1 0.0
December 47.3 29.2 38.3 81 08/1998 0 25/1983 46.1 56 26.6 89 0.0 2.0 20.5 0.0
Annual 67.4 46.1 56.7 106 20110730 -10 19820117 59.6 98 54.3 88 40.0 9.2 90.2 0.3
Winter 46.0 27.4 36.7 82 20000226 -10 19820117 42.6 49 31.1 77 0.0 8.8 64.8 0.3
Spring 66.7 44.1 55.4 98 19910531 9 19620302 59.2 55 51.4 84 2.5 0.3 14.7 0.0
Summer 87.0 65.3 76.1 106 20110730 42 19820829 80.2 111 73.2 79 33.3 0.0 0.0 0.0
Fall 69.7 47.4 58.6 102 19530901 10 19871122 62.1 61 53.4 88 4.1 0.0 10.7 0.0
Table updated on May 22,
For monthly and annual means, thresholds, and sums:
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered
Seasons are climatological not calendar seasons
Winter = Dec., Jan., and Feb. Spring = Mar., Apr., and May
Summer = Jun., Jul., and Aug. Fall = Sep., Oct., and Nov.


Southeast Regional Climate Center, SERCC staff