LEWISTOWN FAA AP, MONTANA

Period of Record General Climate Summary - Temperature

Station:(244985) LEWISTOWN FAA AP
From Year=1896 To Year=2006
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 32.1 9.8 21.0 73 22/1981 -46 28/1929 35.1 2006 -1.8 1950 0.0 12.5 29.3 8.8
February 35.7 12.5 24.1 70 27/1932 -42 17/1936 38.6 1991 -0.2 1936 0.0 9.6 26.5 6.3
March 42.0 19.1 30.5 88 29/1902 -28 03/1896 52.4 1902 14.8 1912 0.0 6.5 27.9 3.1
April 54.1 28.5 41.3 89 29/1939 -17 02/1936 50.3 1910 28.5 1975 0.0 1.5 20.7 0.2
May 63.5 37.0 50.3 98 14/1931 11 06/1929 58.8 1934 44.3 1927 0.2 0.1 8.2 0.0
June 71.6 44.5 58.0 105 21/1900 21 15/1914 67.5 1988 51.0 1951 1.0 0.0 0.9 0.0
July 81.3 49.6 65.5 105 31/1900 27 09/1903 72.5 1936 56.7 1993 5.3 0.0 0.0 0.0
August 80.4 48.2 64.3 103 05/1961 27 25/1910 72.3 1971 58.2 1911 4.7 0.0 0.3 0.0
September 69.2 39.6 54.4 99 09/1909 6 24/1926 62.2 1963 42.8 1965 0.9 0.1 5.1 0.0
October 58.6 31.3 45.0 92 04/1905 -10 30/1935 52.3 1963 34.8 1919 0.0 1.1 16.5 0.2
November 44.3 20.6 32.5 81 13/1905 -30 23/1985 43.9 1949 10.7 1985 0.0 5.1 25.8 2.1
December 35.8 13.3 24.5 74 05/1939 -42 24/1983 36.9 1896 6.3 1983 0.0 10.0 28.8 5.9
Annual 55.7 29.5 42.6 105 19000621 -46 19290128 46.6 1934 37.8 1951 12.2 46.5 190.0 26.6
Winter 34.5 11.9 23.2 74 19391205 -46 19290128 33.0 1992 10.8 1979 0.0 32.1 84.6 21.0
Spring 53.2 28.2 40.7 98 19310514 -28 18960303 47.7 1910 32.9 1975 0.2 8.0 56.8 3.3
Summer 77.8 47.4 62.6 105 19000621 21 19140615 68.0 1961 57.1 1993 11.1 0.0 1.2 0.0
Fall 57.4 30.5 44.0 99 19090909 -30 19851123 50.2 1963 33.2 1985 0.9 6.3 47.4 2.3
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