MONTHLY SUMMARY 



August, 1948 



Normal 



Extremes 



Barometer, in inches 

 (Readings reduced to sea level) 



Maximum 30.16. 23rd 



Minimum 29.64. 14tli 



Mean semi-daily 29.903 



Range 0.52 



Air Temperature, in degrees F. 



Highest 100, 26th 



Lowest 49. 10th 



Mean 71.4 



Range 51.0 



Highest mean daily 84.5, 26th 



Lowest mean daily 61.5, 7th 



Mean maximum 82.9 



Mean minimum 59.9 



Greatest daily range 33. 11th 



Least daily range 7, 12th 



Degree-days of heating load for month 

 Degree-days cumulative for season — 



Precipitation, in inches 



F*i'ecipitation 3.56 



Snow — 



Maximum precip. in 24 hrs 1.84. 12th 



Numher of days with .01 or more 6 



Wind in miles 



Total movement 2017 



Greatest daily movement 143, 12th 



Least daily movement 25, 16th 



.Mean hourly velocity 4.6 



-Maximum velocity 32, 13th 



Wind, direction 



Prevailing direction E 



North, days 4 



Northeast, days 4 



East, days 5 



Southeast, days 5 



South, days 6j 



Southwest, days Oj 



West, days 3 1 



Noi'thwest. days 4' 



Weather 



Mean relative humidity, percent 70 



Mean cloudiness, percent 32 



Number of clear days 5 



Number of fair days 20 



-Mumber of cloudy days 6 



Number of hours bright sunshine ...216.6 

 Percent of possible hours of 



bright sunshine 50.5 



Thunder and lightning 12.13.22.29 



First frost ■ — 



30.32 



29.61 



30.00 



0.71 



IS 



4.08 



11 



3127 



4.2 

 22.7 



SW 



70.2 



49.7 



9 



13 



9 



237 



55.2 



30.50, 1934 

 28.87. 1930 



100, 1918 



34, 1940 



62.4. 1903 



8.40, 1928; 31, 1894 



16, 1892, 1933; 4, 1899 



4,271. 1910: 1,920, 1891 



40, 1941 



67, 1901, 1946; 27, 1923 



23, 1941; 0, 1915. 1929 



25, 1912; 3, 1939 



18, 1901, '28; 2, 1910, '23 



532, 1941; 152, 1915, 1929 



Sept. 21 Aug. 22,'94,'95; Oct. 13, '09 



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 193S, except that humidity records are based on 

 observations made from 1929 to 1938. The third column gives extremes 

 observed from 1889 to 1947. 



