MONTHLY SUMMARY 



OCTOBER 1949 



Barometer, in inches 



(Readings reduced to sea level) 



maximum 30.64, 2nd 



Minimum 29.48, 3 1st 



A'lean semi-daily 30.170 



Range 1.16 



Air Temperature, in Degrees F. 



Highest 88, 11th 



Lowest 28, 25th 



Mean 57.6 



Range 60 



Highest mean daily 74.5, 12th 



Lowest mean daily 42.5, 25th 



Mean maximum 68.93 



Mean minimum 46.35 



Greatest daily range 38, 21st 



Least daily range 7, 24th 



Degree-days of heating load for month. . . 266 

 Degree-days cumulative for season 409 



Precipitation, in inches 



Precipitation 2.58 



Snow 



Maximum precip. in 24 hrs 0.98, 26th 



Number of days with .01 or more 10 



Wind, in miles 



Total movement 2571 



Greatest daily movement 206, 12th 



Least daily movement 18, 7th 



Mean hourly velocity 3.45 



Maximum velocity 28, 26th 



Wind, direction 



Prevailing direction SW 



North, days 5 



Northeast, days 3 



East, days 2 



Southeast, days 7 



South, days 4 



Southwest, days 5 



West, days 2 



Northwest, days 3 



Weather 



Mean relative humidity, percent 73.2 



Mean cloudiness, percent 41.5 



Number of c lear days 15 



Number of fair days 8 



Number of cloudy days 8 



Number of hours bright sunshine 207.6 



Percent of possible hours of 



bright sunshine 60.5 



Thunder and lightning — 



Normal 



Extremes 



30.53 



29.42 



30.06 



l.ll 



79.4 

 23.4 

 50.5 

 56.0 



3.29 

 9 



4074 



5.4 

 29.5 



W 



69.0 

 48 

 10 

 10 

 11 



175.0 



51.3 



30.68, 1929 

 29.00, 1926 



1.47, 1926; .76, 1899 



90.5, 1908 



17, 1936 



57.4, 1947; 43.2, 1890 



8.81, 1911; .01, 1924 

 15, 1913; 1, 1897, 1924 



5,467, 1910; 2,540, 1894 

 42, 1937 



67, 1932; 18, 1924 

 21, 1938; 1, 1911 

 17, 1924; 3, 1938 

 19, 1896; 3, 1924 

 232, 1923, 1938; 91, 1913 



Note — The first column in the above summary gives obser\ations 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 1947. 



