MONTHLY SUMMARY 



AUGUST 1951 



Barometer, in inches 



(Readings reduced to sea level) 



Maximum 30.186, 24th 



Minimum . 29.700, 3rd 



Mean semi-daily 30.044 



Rang 486 



Air Temperalure, in Degrees F. 



Highest 90, 30th 



Lowest 45 , 6th 



Mean 68.4 



Range 45 



Highest mean daily. ... 78, 10th, 11th, 15th 



Lowest mean daily 60.5, 6th, 24th 



Mean maximum 79.3 



Mean minimum 57.8 



Greatest daily range 36, 2nd 



Least daily range 8, 8th 



Degree-days of heating load for month . . — 

 Degree-days cumulative for season — 



Precipitation, in inches 



Precipitation 3.56 



Snow — 



Maximum precip. in 24 hrs 1.11, 16th 



Number of days with .01 or more 11 



Wind, in miles 



Total movement 2133 



Greatest daily movement 177, 22nd 



Least daily movement 28. 19th 



Mean hourly velocity 2.8b 



Maximum velocity 32, I6th 



Wind, direction 



Prevailing direction WNW 



North, days 6 



Northeast, days 1 



East, days 1 



Southeast, days 2 



South, days 5 



Southwest, days 6 



West, days 



Northwest, days 10 



Weather 



Mean relative humidity, percent 82.3 



Mean cloudiness, percent 56.0 



Number of clear days 10 



Number of fair days 14 



Number of cloudy days 7 



Number of hours bright sunshine. . . .225.0 

 Percent of possible hours of 



bright sunshine 52.2 



Thunder and lightning 3rd, 10th 16th, 



17th 20th, 25th 



Normal 



30.32 



29.61 



30.00 



0.71 



91.6 

 43.4 

 68.6 

 48.1 



Extremes 



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, 1948 



34, 1940 



62.4, 1903 



8.40, 1948; .31, 1894 

 16, 1892, 1933; 4, 1899 



4,217, 1910;1,920, 1894 

 40, 1941 



67, 1901, 1946; 27, 1923 



23, 1941; 0, 1915, 1929 



25, 1912; 3, 1939 



18, 1901, 1928; 2, 1910, 1923 



332, 1941; 152, 1915, 1929 



Note — The first column in the above summarj- gives observations made during the month. 

 The second column gives the averages based on observations made from 1889 to 1938, 

 except that humidity lecords are based on observations made from 1929 to 1938. The 

 third column gives extremes observed from 1889 to 1950. 



