Annual Summary 



Annual. 1987 



Normal 



Barometer 



( Readings reduced to sea level) 



Maximum 30.85, Jan. 28 30.81 



iViinimum 29.16, Dec. 7 28.95 



Mean semi-daily 30.023 30.016 



Range 1.69 1.86 



Air Temperature 



Higtiest 96, July 8 95.8 



Lowest 6, Feb. 4, Dec. 31 -12 



Mean 49.0 47.2 



Annual range yO 108 



Highest mean daily .... 84, Aug. 20 



Lowest mean daily 15, Feb. 2 



Mean maximum 58.7 57.8 



Mean minimum 39.2 36.5 



Greatest daily range 46, May 3 ! 



Least daily range 1, Nov. 20 I 



Preripilatioii 



Precipitation. In inches 49.49 43.49 



Snow, in inches 25.i 48.38 



Maximum precipitation in 24 hrs. 



2 34, Nov. 28, 29 

 Number of days on which .01 or morg 



inches of precipitation fell . . . 125 123 



Wind (miles) 



Total movement 46,950 52,321 



Greatest daily movement . . 374, Feb. 22 



L jast daily movement 23, Jan, 8 



Mean hourly velocity 5.4 6.0 



Maximum velocity, 5 min., . . 48, Feb. 22 35 



Wind (direction) 



Prevailing direction wnw 



North, days 39 



Northeast, days 10 



East, days 6 



Southeast, days 55 



South, days 56 



Southwest, days 23 i 



West, days 65 



Northwest, days Ill 



Weather 



Mean relative humidity, per cent. . 68.2 67.6 



Mean cloudiness, per cent 55.2 50.8 



Number of clear days 139 109 



Number of fair days 105 1 28 



Number of cloudy days 121 128 



Number of hours bright sunshine . . 2326 2,356 

 Percent of possible hours of bright 



sunshine 52 53.0 



Last frost April 26 M'y 12 



First frost Oct. 9 S't 19 



La.«?t snow April 9|Apr 14 



First snow Nov. 19 Nov. 5 



Extremes 



31.05, 1920 

 28.47, 1914 



2.33, 1913; 1.38, 1933 



104, 1911 



-26.0, 1904 



49.6, 1913; 44.0, 1904 



57.05, 1897; 30.68, UC8 

 78.00, 1920; 24.50, 1919 



144, 1902; 96, U24 

 63,571, 1908; 36,257, 1894 



48, 193?, 1934 



60, '98, '01, '02; 41, '08, '24 



169, 1932; 59, 1927 



182, 1912; 83, 1894 



179, '01, '02; 71, 1910 



2,838, 1924; 1,864, 1902 



Apr. 23, 1904; June 8, 1932 



Aug. 22, '94, '95; Oct. 13, '09 



Mar. 14, '10; May 5. '91 '17 



Oct. 10, '2.5; Nov. 27, '31 



NoTK— The first column in the above summary gives obsprvations made during; the 

 month. The second column gives the averages b:i8ed on observations made from 1«»9 

 to 19v'H. event that huniiditv records are based on observations made from 19v!y to 19at) 

 riie third column tfives extremes observed from 1889 to lySfi 



