Annual Summary for 1909. 



Pressure. In inches. 



Maximum reduced to freezing, 



Minimum reduced to freezing, 



Maximum reduced to freezing and sea-level, 

 Minimum reduced to freezing and sea-level, 

 Mean reduced to freezing and sea-level, . . • 

 Annual range, 



30.42, Jan. 8, S A.; i6th, 7 p_ 



. 28.54. Mar. 25th, 10 P. 



30.75, Jan. 8, 8 A.; 16th. 7 p. 



. . . . 28. 84, Mar. 25th, 10 P. 



30.006 



1-91 



*Air Temperature. In degrees Fahr. 



Highest, 94.0, Aug 8th, 4 P. 



Lowest, —8.5, Dec. 30, 8 A. 



Mean, 46.8 



Mean of means of max. and min., 47-3 



Mean sensible (wet bulb) , 42.3 



Annual range, 102.5 



Highest mean daily 80.8, July 30. 



Lowest mean daily, 2.6, Dec. 30. 



Mean maximum, 58.0 



Mean minimum, ' 36-6 



Mean daily range, 21.4 



Greatest daily range, 42-0, Oct. 7. 



Least daily range, ■ • 3.5. Feb. 24. 



Htimidity . 



Mean dew point, 38-2 



Mean force of vapor, 3^9 



Mean relative humidity, 76-8 



Wind. 



Prevailing direction, Northwest 



.Summary. 



North, Northwest, ij per cent. 



Northwest, 10 



West, Southeast 10 



North, 10 



West, Northwest 12 



Other directions, 43 



Total movement 63.513 m. 



Greatest daily movement, . . . .705 m., Apr. 8. 



Least daily movement, 19 m-, Nov. 28. 



Mean daily movement, i74 m. 



Mean hourly velocity, 7-2 m. 



*Temperature in ground shelter. 



Maximum pressure per square foot, 27.5 lbs. =74 

 m. per hour, Apr. 8, 10 a., N.N.W. 



Maximum velocity for 5 minutes, 45 m. per 

 hour, Mar. 25, 2 P. .S.E. 



Precipitation. In inches. 



Total precipitation, rain or melted snow, . 39.12 

 Number of days on which .01 or more rain 



or melted snow fell, 128 



Snow total in inches, .... 31 



Weather. 



Mean cloudiness observed, 50 per cent. 



Total cloudiness recorded by Sun Thermom- 

 eter, 1944 hrs. =44 per cent. 



Number of clear days, 1 12 



Number of fair days, 151 



Number of cloudy days 102 



Bright Sunshine. 



Number of hours recorded, 2510 hrs.=56 per cent. 

 Dates of Frosts. 



Last, May 12th 



First Oct. 13th 



Dates of Snow. 



Last April 29th 



First, Oct. 17th 



Total days of sleighing, 39 



Gales of 50 or More Miles Per Hour. 



Feb. 6th, 54 m., S.; Mar. 25th, 60m., S.E. 

 April 7th, 51 m., N.N.W.; 8th, 74 m., N.N.W. ; 



1 2th, 52 m., W.; 19th, 60 m., W S.W. 

 Nov. 29th, 51 m.; N. 

 Dec. 29th, 53 m., N.N.E. 



J. E. OSTRANDER, 



C. M. DAMON, 



Observer. 



Meteorologist. 



