Annual Summary for 1920. 



Pressure. In inches. 



Maximum reduced to freezing, 30.71, Feb. ist, 10 A. 



Minimum reduced to freezing • 28.72, Mar. 13th, 5 p. 



Maximum reduced to freezing and sea-level 3i-o5, Feb. ist, 10 A. 



Minimum reduced to freezing and sea-level, 29.03, Mar. 13th, 5 p- 



Mean semi-daily reduced to freezing and sea-level, 30.004 



Annual range 2.02 



*Air Temperature. In degrees Fahr. 



Highest, 92, Aug. 8th, 2:30 p. 



Lowest, — 18.0, Feb. ist, 7 A. 



Mean hourly, '. 46.4 



Mean of means of max. and min., 46.8 



Mean sensible (wet bulb) , 42.2 



Annual range, iio.o 



Highest mean daily, 76-4, Aug. g 



Lowest mean daily, —4-7, Jan. 3 



Mean maximum 57.1 



Mean minimum, 36.6 



Mean daily range, 20.5 



Greatest daily range 44.0, Oct. 7 



Least daily range, 3.5, Feb. 26, Apr. 2d 



Humidity. 



Mean dew point, 38.7 



Mean force of vapor, 372 



Mean relative humidity, 79.2 



Wind. 



Total movement 51.47° m 



Greatest daily movement, .... 537 m.. Mar. 6 



Least daily movement, o m., Oct. 6 



Mean daily movement, 141 m 



Mean hourly velocity, 5-9 m 



Ma.xinium pressure per square foot, 16.0 lbs., 



57 m. per hour. Mar. 6, 10:30 a., N.W. 

 Maximum velocity for 5 minutes, 40 m. per 



hour, Oct. I, 2 A. S.S.W. 



Prevailing direction, West. 



Summary. 



Soutli Southwest 16 per cent 



South 10 " " 



West Northwest 11 ." " 



North 9 " " 



North Northeast 9 " " 



Other directions, 35 " " 



Precipitation. In inches. 

 Total precipitation, rain or melted snow, . 50.09 



Snow total in inches, 7S.00 



Number of days on which .01 or more rain 

 or melted snow fell, 135 



Weather. 



Mean cloudiness observed, 51 per cent. 



Total cloudiness recorded by Sun Thermom- 

 eter, 1795 hrs.:=40 per cent. 



Number of clear days, 118 



Number of fair days, 156 



Number of cloudy days 92 



Bright Sunshine. 



Number of hours recorded,2662 hrs.=6o per cent. 



Daes of Fro.>*t.s. 



Last, . 

 First, 



April 26th 

 . lOot. 7th 



Dates of .Snow. 



Last April Sth 



First, Nov. 12th 



Total days of sleighing, 79 



Gales of 50 or More Miles Per Hour. 



Mar. 6th, 57m., N.W. 



Temperature in ground shelter. 



H. W. POOLE. 

 Observer. 



J. E. OSTRANDER, 



Aleteorologist. 



