MONTHLY SUMMARY 



January, 1946 



Barometer, in inches 



(Readings reduced to sea level) 



Maximum _..30.70, 20th 



Minimum 29.41, 31st 



Mean semi-daily 30.118 



Range 1.29 



Air Temperature, in degrees F. 



Highest 50, 6th 



Lowest .-8, 28th 



Mean 23.2 



Range 58 



Highest mean daily 45.5, 6th 



Lowest mean daily 6.0, 20th 



Mean Maximum 31.9 



Mean Minimum 14.4 



Greatest daily range 35, 23rd 



Least daily range -—7, 12th 



Precipitation, in inches 



Precipitation — 2.72 



Snow 20.3 



Maximum precip. in 24 hrs..._-0.77, 24th, 25th 

 Number of days with .01 or more 12 



Wind, in miles 



Total movement ,-. 4421 



Greatest daily movement 375, 19th 



Least daily movement 9, 17th 



Mean hourly velocity 5.9 



Maximum velocity 40, 13th 



Wind, direction 



Prevailing direction W 



North, days 1 



Northeast, days — 



East, days .-. 



Southeast, days 7 



South, days 1 



Southwest, days 2 



West, days 11 



Northwest, days .9 



Weather 



Mean relative humidity, percent — ...66.6 



Mean cloudiness, percent 58 



Number of clear days 9 



Number of fair days 13 



Number of cloudy days -9 



Number hours bright sunshine 143 



Percent of possible hours of bright 



sunshine 48.6 



Thunder and lightning — 



Note — The first column in the above sunmiary gives observations inadc during the 

 month. The second column gives the averages based on observations made from 

 1889 to 1938, except that humidity records are based on observations made from 

 1929 to 1938. The third column gives extremes observed from 1889 to 1945. 



