^^^''^^ '-"^''"setts Afrricultural College 



'•^J^ST, MASS. 



BULLETIN No. 409. 



JANUARY. 1923 



Meteorological Observations 



AT THE 



MASSACHUSETTS 



AGKICULTUIUL EXPERIMENT 



STATION. 



Latitude, 42° 23' 48.5" N. Longitude 72' 31' 10" W. 



Height of barometer above ground, ^r ft. Above sea level, 2'/j.^ ft. 

 Height 0/ Wind Instruments J 2 ft. Time used, y^th Mer. 



MONTHLY SUMMARY. 



Pressuie. In inches. 



Maximum reduced to freezing, 30.52, 22d, iiA 

 Miiiinnim reduced to freezing, 29.12, loth. 6.-V 

 Reduced maximum reading 30. 84. 23d, iiA 

 Reduced minimum reading, 29.43, loth, 6.A 



Mean semi-daily reduced 30.07S 



Monthly range 1.4 



Air Temperature. 



In Degrees Fahr. 



Highest 50.5, ist, 12M 



Lowest -120, 31st, 6a 



Mean hourly 20.3 



Mean of means of max. and min 19.7 



Mean sensible (wet bulb) 17.4 



Monthly range 62.5 



Highest mean daily 43.6, ist 



Lowest mean daily 6.9, 30th 



Mean maximum 29.6 



Mean minimum 9.8 



Mean daily range 19.9 



Greatest daily range 45.5, iSth 



Least daily range 6.0, 28th 



Hnmidity. 



Mean dew point 13.6 



Mean force of vapor 115 



Mean relative humidity 80.1 



Precipitation. In inches. 



Total precipitation, in inches 6 02 



Total snow, in inches 33.0 



Number of days on which .01 inch or more 



rain fell 18 



Days of sleighing 31 



•Temperature in ground shelter. 

 ••Reduced to freezingand sea-level. 



Wind. 



Total movement 4392 m 



Greatest daily movement 3i5ni, ist 



Least daily movement 23m, 20th 



Mean daily movement 142m 



Mean hourly velocity 5.9m 



Maximum pressure per square foot, 11. 5 lbs = 



48m per hour, ist, loA., S.S.W. 

 Maximum velocity for 5 minutes, 28 m per 



hour, ist, 9A., S.S.W. 

 Prevailing direction. North Northwest. 



Summary. 



North 23 per cent 



North Northwest ig " " 



West Northwest 13 " " 



Northwest 10 " " 



Other directions 35 " " 



Weather. 



Mean cloudiness observed .... 58 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . . 21S hours = 74 per cent. 



Number of clear days j 



Number of fair days 6 



Number of cloudy days 22 



Bright Sunshine. 



Number hours recorded, 76 = 26 per cent. 



Rain, ist, 20th, 2ist, 22d, 24th, 25th. 



Snow, 3d, 4th, 6th, 7th, 8th, gth, loth, nth, 



12th, 14th, 15th, iSth,2ist, 22d, 24th, 25th. 



28th. 

 Galea. 35 or more miles per hour, 48ni, ist, 



S.S.W.; 4oni, 6th, N.; 36m, i3th,W.N.W.: 



35m, 25th, N.W. 



