MorsjTHLY Summary 



August, 19;i2 



Barometer 



( Readings reduced to sea level) 



Maximum 30.31, 24th 



Minimum 29.71, 11th 



Mean semi-daily 29.997 



Range 0.60 



Air Tempersiture 



Highest 91, 25th, 26th 



Lowest 46, 1st 



Mean 70.5 



Monthly range 45 



Highest mean daily 78.5, 8th, 26th 



Lowest mean daily 62.5, 1st 



Mean maximum 82.9 



Mean minimum 58.0 



Greatest daily range 39, 15th 



Least daily range 6, 3rd 



Precipitation 



Precipitation. In inches 2.67 



Snow, in inches 



Maximum precipitation 24 hrs. 0.98, 



3rd 

 Number of days on which .01 or more 



inches of rain fell 11 



■Wind (miles) 



Total movement 3,301 



Greatest daily movement .... 172, 18th 



Least daily movement 28, 2nd 



Mean hourly velocity 4.4 



Maximum velocity for 5 min. 22, ... . 10th 



(coireeted to confoiiii to '^ cup aneiuoiuetei) 

 Wind (direction) 



Prevailing direction ssw 



North, days 1 



Northeast, days 



East, days 3 



Southeast, days 10 



South, days 2 



Southwest, days 3 



West, days 7 



Northwest, days 5 



Weather 



Mean relative humidity, per cent . . 67.0 



Mean cloudiness, per cent 38.5 



Number of clear days 15 



Number of fair days 12 



Number of cloudy days 4 



Number of hours bright sunshine 286.0 

 Percent of possible hours of bright 



sunshine 67 



Thunder and Lightning 7th, 27th 



Frosts 



Normal 



E.xtremes 



30.32 



29.63 



30.00 



.69 



91.3 



42.9 

 68.4 

 48.4 



4.24 



10 

 3,099 



4.2 

 21 



78.4 

 49.4 



9 

 13 



9 

 237 



55.2 



30.48, 1918 

 29.18, 1890 



1.10, 1890; 0.44, 1894 



100.0, 1918 

 37.0, 1894, 1908 



8.28, 1915; 0.31, 1894 



16, 1892; 4, 1899 

 4,271, 1910; 1,920, 1894 



35, 1915 



87.3, 1927; 69.9, 1894 



67, 1901; 27, 1923 



17, 1921; 0, 1915 



25, 1912; 5, 1893 



18, '01, '28; 2, '10, '23 



317, 1921; 152, 1915, 1929 



Note— The first column in the above summar.v gives observations made during the 

 month. The second column gives averages based on observations made from ls»S) to 

 ly'2S. The third column gives extremes observed from l«8y to 1981. 



