AMHERST, MASS. 



BULLETIN No. 402. 



JUNE, 1922 



Meteoroloo'ical Observations 



o 



AT THK 



MASSACHUSETTS 



AGRICULTUML EXPElilMENT 



STATION. 



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



flei_^ht of ha ro meter above ground, 51 ft. Above sea level, 2yj.^ ft. 

 Height oj Wind Instruments J 2 ft. Time used, y^t/i Mer. 



MONTHLY SUMMARY. 



Pressuie. In inches 



Maximum reduced to freezin 

 Minimum reduced to freezin; 

 Reduced maximum reading 

 Reduced minimum reading, 



Mean semi-daily reduced 29.963 



Monthly range o.Si 



30.21, ist, o A 

 9.40, nth, 2 p 



Air Temperature. 



Win.l, 



2992, 1st, o A Potal movement 3S27 m 



29.12, nth, 2 P Greatest daily movement 35om, 12th 



Least daily movement 39m, 30th 



Mean daily movement n8m 



Mean hourly velocity 4.qm 



Maximum pressure per square foot. 15.5 lbs = 



56m per hour, 12th, 1 p, W.N.W. 

 Maximum velocity for 5 minutes, 42 m per 



hour, i2th, 2 p., W.N.W. 

 Prevailing direction, Southwest. 



In Degrees Fahr. 



Highest 90.0, 9th, 1:30 p 



Lowest 43.0, 13th, 6 A 



Mean hourly 66.5 



Mean of means of max. and min 67.4 



Mean sensible (wet bulb) 63.2 



Monthly range 47.0 



Highest mean daily 75.5 9th 



Lowest mean daily 59.4, 19th 



Mean maximum 77.4 



Mean minimum 75.4 



Mean daily range 20.0 



Greatest daily range 34.0, 5th 



Least daily range 5.0, 21st 



Humidity. 



Mean dew point 61.4 



.Mean force of vapor 646 



Mean relative humidity 85. 9 



Precipitation. In inches. 



Summary. 



South Southwest 33 per cent 



Southwest 13 " " 



West Northwest 13 " " 



South 10 " " 



Other directions 31 " " 



Weather. 



Mean cloudiness observed .... 56 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . . 191 hours = 42 per cent. 



Number of clear days 10 



Number of fair days 13 



Number of cloudy days 7 



Bright Sunshine. 



Number hours recorded, 266, = 58 per cent. 



Kain, 2d, 3d, 4th, 5th, 6th, loth, nth, 15th, 

 17th, iSth, 19th, 20th, 2ist, 22d, 23d, 25th, 

 27th, 2Sth, 29th. 



Thunder and Liiihtninii, 9th, nth. 15th 

 25th, 2Sth, 29th. 



Total precipitation, in inches 9.68 



Number of days on which .01 inch or more 



rain fell 17 Gales. 4"". "th, S; 56m, 12th, W.N.W 



I 



•Temperature in ground shelter. 



"Reduced to freezing and sea-level. 



