MONTHLY SUMMARY 



October, 1941 



Norma! 



Extremes 



Barometer, in inches 



(Readings reduced to sea level) 



Maximum 30.60, 29th, 30th 



Minimum 29.48, 23rd 



Mean semi-daily 30.059 



Range 1.12 



Air Temperature, in degrees F. 



Highest 88, 5th 



Lowest 24, 29th 



Mean 52.5 



Range 64 



Highest mean daily 73.5, 5th 



Lowest mean daily 35, 30th 



Mean maximum 63.5 



Mean minimum J 1.4 



Greatest daily range 37, 17tli 



Least daily range 7, 7th 



Precipitation, in inches 



Precipitation 2.13 



Maximum precipitation in 24 hrs. .72, 10th 



Number of days with .01 or more 8 



Wind, in miles 



Total movement 4506 



Greatest daily movement 295, 8th 



Least daily movement 36, 3rd 



Mean hourly velocity 6.0 



Maximum velocity 32, 23rd 



Wind, direction 



Prevailing direction WNW 



North, days 6 



Northeast, days 



East, days 



Southeast, days 2 



South, days 4 



Southwest, days 4 



West, days 5 



Northwest, days 10 



Weather 



Mean relative humidity, percent 70.7 



Mean cloudiness, percent 56 



Number of clear days 13 



Number of fair days 4 



Number of cloudy days 14 



Number hours bright sunshine 165 



Percent of possible hours of bright 



sunshine 48 



Thunder and lightning 



First fro.^t Sept. 30 



30.53 



29.42 



30.06 



l.ll 



79.4 

 23.4 

 50.5 

 56.0 



69.0 



48 

 10 

 10 

 11 

 175.0 



51.3 



-ept. 21 



30.68, 1929 

 29.00, 1926 



1.47, 1926; .76, 1899 



90.5, 1908 



17, 1936 



56.4, 1920; 43.2, 1890 



67, 1932; 18, 1924 



21, 1938; 1, 1911 



17, 1924; 3, 1938 



19, 1896; 3, 1924 



232, '23, '38; 91, 1913 



Aug. 22, '94, '95; Oct. 15, '39 



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 1940. 



