MONTHLY SUMMARY 



OCTOBER 1948 



Barometer, in inches 



(Readings reduced to sea level) 



Maximum 30.65, 22nd 



Minimum 29.68. 9th 



Mean semi-daily 30.117 



Range 0.97 



Air Temperature, in degrees F. 



Highest 79, 1st 



Lowest 21, 22nd 



;\Iean 51.3 



Range 58 



Highest mean daily 68. 1st 



Lowest mean daily 37, 19th 



Mean maximum 62.6 



Mean minimum 40.02 



Greatest daily range 43, 31st 



Least daily range 5, 25th 



Degree-days of heating load for month ..42!) 

 Degree-days cumulative for season ....533 



Precipitation, in inches 



Precipitation 1.13 



Snow 



Maximum precip in 24 hrs 0.43. Sth 



Xumber of days with .01 or more 7 



Wind in miles 



Total movement 3025 



Greatest daily movement 302, 25th 



Least daily movement 12, 20th 



Mean hourly velocity 4.07 



Maximum velocity 22, 3rd, 25th, 26th 



Wind, direction 



Prevailing direction N 



North, days .'. 14 



Northeast, days 3 



East, days 1 



Southeast, days 2 



South, days 3 



Southwest, days 1 



West, days 4 



Northwest, days 3 



I 



Weather 



Mean relative humidity, percent 66.8 69.0 



Mean cloudiness, percent 40 48 



Number of clear days 4 10 



Number of fair days 13 10 



Number of cloudy days 14 11 



Number of hours bright sunshine ....126.8 175.0 

 Percent of possible hours of 



bright sunshine 34 51.3 



Thunder and lightning — 



First frost — Sept. 21 



3.29 



9 



4074 



5.4 

 29.5 



W 



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, -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 observa- 

 tions 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. 



