LEWISTOWN FAA AP, MONTANA

Period of Record General Climate Summary - Precipitation

Station:(244985) LEWISTOWN FAA AP
From Year=1896 To Year=2006
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 0.74 2.75 1978 0.00 1901 0.87 25/1978 8 3 0 0 11.0 33.0 1971
February 0.65 2.22 1914 0.02 1901 2.02 22/1914 7 2 0 0 7.3 18.6 1949
March 1.00 3.81 1902 0.00 1900 1.25 25/1995 9 3 0 0 10.3 27.7 1995
April 1.28 4.50 1900 0.09 1949 4.50 23/1900 9 4 0 0 8.5 37.8 1970
May 2.81 9.16 1981 0.31 1928 2.81 20/1962 12 6 2 1 3.7 29.5 1982
June 3.52 9.56 1923 0.46 1912 3.10 06/1906 13 8 2 1 0.1 2.0 1969
July 1.93 5.97 1928 0.04 1908 2.80 13/1907 9 5 1 0 0.0 0.0 1948
August 1.62 5.54 1985 0.02 1901 2.99 08/2002 8 4 1 0 0.0 0.0 1948
September 1.49 4.92 1941 0.00 1990 1.76 21/1959 8 4 1 0 1.0 9.2 1983
October 1.13 5.80 1908 0.00 1902 3.80 21/1908 7 3 0 0 3.8 18.6 1975
November 0.74 3.97 1897 0.00 1907 1.80 24/1896 7 3 0 0 6.9 16.2 1996
December 0.76 2.36 1977 0.00 1896 0.96 12/1937 8 3 0 0 10.1 30.0 1971
Annual 17.66 28.11 1978 11.15 1956 4.50 19000423 105 48 8 2 62.8 122.1 1982
Winter 2.15 5.87 1978 0.56 1987 2.02 19140222 24 8 0 0 28.5 62.2 1978
Spring 5.09 12.25 1981 1.42 1958 4.50 19000423 30 14 2 1 22.5 64.6 1982
Summer 7.07 15.01 1923 2.27 2003 3.10 19060606 30 17 4 1 0.1 2.0 1969
Fall 3.36 8.05 1908 0.25 1904 3.80 19081021 22 10 1 0 11.7 34.0 1975
Table updated on Jul 28, 2006
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