MONTHLY SUMMARY 



May 1945 



Barometer, in inches 



(Readings reduced to sea level) 



Maximum 30.35, 27th 



Minimum --...- - 29.30, 10th 



Mean semi-daily - 29.888 



Range 1.05 



Air Temperature, in degrees F. 



Highest - - -- -81, 26th 



Lowest - 31, 1 1th 



Mean 54.1 



Range .— 50 



Highest mean daily - -—65.5, 15th 



Lowest mean daily - -41, 10th 



Mean maximum — — 64.5 



Mean minimum 43.7 



Greatest daily range 40, 26th 



Least daily range 6, 4th 



Precipitation, in inches 



Precipitation — 6.45 



Snow ........ ^ 1.00 



Maximum precipitation in 24 hrs. 



1.53, 10th, 11th 



Number of days with .01 or more 20 



Wind, in miles 



Total movement 4379 



Greatest daily movement 391, 31st 



Least daily movement — 42, l7th 



Mean hourly velocity 5.9 



Maximum velocity 35, 31st 



Wind, direction 



PrevaiHng dicection — SSW 



North, days 1 



Northeast, days — 



East, days . — ..— j— _ _ — —2 



Southeast, days - - 12 



South, days ^ - 1 



Southwest, days — — — 



West, days - 8 



Northwest, days 7 



Weather 



Mean relative humidity, percent 73.2 



Mean cloudiness, percent 65 



Number of clear days . . 8 



Number of fair days 11 



Number of cloudy days — 12 



Number liours bright sunshine — 190 



Percent of possible hours of bright 



sunshine . 41.9 



Thunder and lightning - 22nd 



Last snow May 11 



Normal 



30.39 



29.51 



29.96 



0.88 



86: 1 

 31.2 

 57.1 

 54.9 



3.60 



12 



4504 



6.1 

 28.8 



W 



60.7 



52.1 

 11 

 11 

 9 



252 



55.6 



Extremes 



30.62, 1936 

 29.10, 1938 



94.5, 1896. 1911 

 24.0, 190U 



7.44. 1931; .48, 190:, 



20, 1901 : 5, 1903 

 5946, 1907; 2180, 1894 



45, 1935 



70, 1901. 1902: .iO, ^923 



21. 1944; 0, 1927 



17, 1907, 1926; 5, 19.^3 



20, 1927; 2, 10-!^ 



3.S0, 1944; 137, 1927 



Note— The first column in the above summary gives observations made durinu- 

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

 from 1889 to 1938, except that humidity records are based on observations n^a'^c 

 from 1929 to 1938. The third column gives extremes observed from 18SQ to 1Q44 



