NATIONAL ARBORETUM DC, MARYLAND

Period of Record General Climate Summary - Precipitation

From Year=1948 To Year=2012
Station:(186350) NATIONAL ARBORETUM DC
Averages Daily Extremes
Precipitation Total Snowfall
Mean High Year Low Year 1 Day Max. >=
0.01 in.
>=
0.10 in.
>=
0.50 in.
>=
1.00 in.
Mean High Year
in. in. - in. - in. dd/yyyy
or
yyyymmdd
# Days # Days # Days # Days in. in. -
January 3.11 7.58 78 0.34 55 2.43 01/1976 9 6 2 1 5.2 25.0 66
February 2.84 8.12 103 0.12 87 2.43 23/2003 8 6 2 1 5.5 42.8 110
March 3.70 8.45 94 0.08 106 2.61 29/1984 9 7 3 1 2.0 22.9 58
April 3.34 7.68 52 0.05 85 4.70 27/1952 10 7 2 1 0.1 3.0 64
May 4.04 9.01 108 0.90 86 3.65 12/2008 11 7 3 1 0.0 0.0 49
June 3.97 13.01 106 0.51 88 7.37 26/2006 10 7 3 1 0.0 0.0 49
July 4.23 11.03 75 0.58 57 4.60 14/1975 10 7 3 1 0.0 0.0 49
August 4.51 14.43 55 0.32 89 5.88 13/1955 9 6 3 1 0.0 0.0 48
September 3.84 13.72 75 0.13 105 6.18 06/1979 8 5 2 1 0.0 0.0 48
October 3.35 10.32 105 0.00 63 5.30 14/1955 8 5 2 1 0.0 0.0 48
November 3.22 8.17 63 0.51 81 2.91 09/1996 8 5 2 1 0.6 13.0 87
December 3.26 8.04 69 0.25 55 2.84 02/1974 9 6 2 1 2.4 19.0 109
Annual 43.41 71.52 103 28.84 65 7.37 20060626 109 74 30 11 15.8 51.0 110
Winter 9.21 16.79 79 3.84 77 2.84 19741202 26 18 7 2 13.1 68.3 110
Spring 11.08 17.34 108 5.43 106 4.70 19520427 31 21 8 2 2.1 22.9 58
Summer 12.70 21.99 103 4.74 66 7.37 20060626 29 20 8 3 0.0 0.0 49
Fall 10.42 18.68 75 3.68 101 6.18 19790906 24 16 7 3 0.6 13.0 87
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 Webmaster