MONTHLY SUMMARY 



May 1943 



Barometer, in inches 



(Readings reduced to sea level) 



Maximum 30.54, 16th 



Minimum ..29.54, 1st 



Mean semi-daily ..30.039 



Range _ 1 .00 



Air Temperature, in degrees F. 



Highest 84, 17th 



Lowest 31, 2nd 



Mean 57.8 



Range 53 



Highest mean daily 71.5, 17th 



Lowest mean daily 38.0, 1st 



Mean maximum 68.5 



Mean minimum 47.0 



Greatest daily range 38, 15th 



Least daily range 4, 11th 



Precipitation, in inches 



Precipitation 5.62 



Maximum precipitation in 24 hrs 0.92, 



21st, 22nd 

 Number of days with .01 or more 15 



Wind, in miles 



Total movement 4420 



Greatest daily movement 459, 1st 



Least daily movement 51, 30th 



Mean hourly velocity 5.9 



Maximum velocity 39, 17th 



Wind, direction 



Prevailing direction W 



North, days 1 



Northeast, days 



East, days _ 2 



Southeast, days 9 



South, days ....2 



Southwest, days 3 



West, days 



Northwest, days 14 



Weather 



Mean relative humidity, percent 68.5 



Mean cloudiness, percent 60 



Number of clear days ...14 



Number of fair days 11 



Number of cloudy days 6 



Number hours bright sunshine 274 



Percent of possible hours of bright 



sunshine 60.5 



Thunder and lightning 



3rd, 8th, 12th, 17th, 18th, 19th, 27th 



Last frost May 5 



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 



Mav 14 



Extremes 



30.62, 1936 

 29.10, 1938 



94.5, 1896, 1911 

 24.0, 1900 



7.44, 1931; .48, 1903 



20, 1901; 5, 1903 



5946, 1907; 2180, 1894 



45, 1935 



70, 1901, 1902; 30, 1923 



20, 1923, 1941; 0, 1927 



17, 1907. 1926; 5, 1923 



20, 1927; 2, 1941 



338, 1941 ; 137, 1927 



une 8, 1932; Apr. 22, 1904 



Note — The first column in the above summary gives observations made 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 1942. 



