Massachusetts Agriniltural Coller'^. 

 AMHERST, MAS'^. 



BULLETIN No. 4 14. 



JUNE. 1923 



Meteorological Observations 



AT THE 



MASSACHUSETTS 



AGRICULTUIUL EXPERIMENT 



STATION. 



Latitude, 42° 23' 48.5" N, Longitucre 72* 31' 10" \V. 



Height of barometer above ground, 51 ft. Above sea level, 2jj.^ ft. 

 Height oj IVi/ui Itistrutnents 72 ft. Time used, y^th Mer. 



MONTHLY' SUMMARY. 



Tessuie. 



In inches. 



Maximum reduced to freezing, 29.90, iSth, 8a: 



30th, I2P. 



Minimum reduced to freezing, 29.0.), 26th. 71 

 Reduced maximum reading, 30.19 istii, 8a ; 



30th, 12P. 



Reduced minimum reading, 29.32, 2bth, 7? 



Mean semi-daily reduced 29.852 



Montiily range 0.87 



Air Temperature. 



In Degrees Fahr. 



Highest 97 0, 19th, 3P 



Lowest 420, 13th, 6.^ 



Mean hourly 68. 1 



Mean of means of max. and niin 67.9 



Mean sensible (wet bulb) 60.5 



Monthly range 550 



Highest mean daily 81.7,20th 



Lowest mean daily 53.7, Sth 



Mean maximum 81.2 



Mean minimum 54.6 



Mean daily range 26.6 



Greatest daily range 40.5, i9tli 



Least daily range , . 7.5, Sth 



Humidity. 



Mean dew point 56.3 



Mean force of vapor 679 



Mean relative humidity 70 



Precipitation. In inches. 



Total precipitation, in inches 2.24 



Number of days on which .01 inch or more 

 rain fell 10 



•Temperature in ground shelter. 

 ••Reduced to freezingand sea-level. 



Wind. 



I'otal movement 33i4ni 



'ireatest daily movement 333m, 27th 



Least daily movement 25m, 30th 



Mean daily movement iiom 



Mean hourly velocity 4.6m 



Maximum pressure per square foot, 7.0 lbs = 



37ni per hour, 9th, 12M., N. 

 Maximum velocity for 5 minutes, 27m per 



hour, 27th, I2M., W. 

 Prevailing direction. West. 



■ Summary. 



.Southwest 17 per cent 



North 13 " " 



.South 13 " " 



North Northeast 10 " " 



West 10 " " 



Northwest 10 " " 



Other directions 27 "' " 



Weather. 



Mean cloudiness observed .... 38 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . . 97 hours = 21 per cent. 



Number of clear days 19 



Number of fair days 10 



Number of cloudy days i 



Bright Sunshine. 



Number hours recorded, 360 = 79 per cent. 

 Rain, 3d, 4th, 6th, 7th, Sth, 9th, 15th, 23d, 

 26th, 28th. 



Thunder and Lightninti, 4th, ;th, 6th, 



24th, 26th, 

 .Gales, 35 or more miles per Jiour, 37m 9tii, 



N.; 36m, 27th, \V. 



