HEADWORKS PORTLAND W, OREGON

Period of Record General Climate Summary - Precipitation

Station:(353770) HEADWORKS PTLD WTR BUR
From Year=1899 To Year=2012
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 10.96 23.34 1953 0.39 1985 4.48 06/1948 21 17 8 3 7.2 62.5 1950
February 8.39 19.89 1949 0.51 1920 4.04 07/1996 18 15 6 2 2.9 47.7 1949
March 8.65 16.44 1916 2.31 1992 4.63 31/1931 20 16 6 2 1.6 22.0 1951
April 6.42 13.18 1993 1.40 1956 3.45 27/1990 18 13 5 1 0.3 7.5 1936
May 5.29 10.81 1998 0.57 1992 2.74 17/1991 15 11 4 1 0.0 2.0 1950
June 4.03 9.59 1937 0.20 1918 3.10 30/1935 12 8 3 1 0.0 0.0 1903
July 1.27 6.56 1983 0.00 1910 2.03 02/1916 5 3 1 0 0.0 0.0 1905
August 1.65 7.15 1968 0.00 1914 1.81 22/2004 6 3 1 0 0.0 0.0 1906
September 3.83 14.96 1933 0.00 1975 5.30 14/1933 9 7 3 1 0.0 0.0 1905
October 6.70 17.75 1947 0.31 1987 6.80 27/1994 15 11 5 2 0.1 5.5 1935
November 11.04 30.77 1942 0.77 1936 5.13 20/1921 20 16 8 3 0.7 17.5 1977
December 11.59 32.74 1933 2.86 1985 6.70 06/1933 21 18 9 3 3.1 28.8 2008
Annual 79.80 137.12 1933 53.12 1952 6.80 19941027 179 139 59 19 15.9 106.0 1937
Winter 30.93 49.12 1933 12.26 1977 6.70 19331206 60 50 23 8 13.3 100.0 1937
Spring 20.36 33.16 1945 10.24 1924 4.63 19310331 53 41 15 4 2.0 22.0 1951
Summer 6.95 15.77 1983 1.62 2003 3.10 19350630 23 15 5 1 0.0 0.0 1915
Fall 21.57 39.79 1942 4.16 1952 6.80 19941027 44 34 16 6 0.7 17.5 1977
Table updated on Oct 31, 2012
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. 






Western Regional Climate Center, wrcc@dri.edu