Monthly Summary 



February, 1931 



I Normal 



Extremes 



Barometer 



(Reading's reduced to sea level) 



Maximum 30.51, 7th 



Minimum 29.63, 14th 



Mean semi-daily 30.022 



Range 88 



Air Temperature 



Highest 48, 28th 



Lowest -11, 3rd 



Mean 25.4 



Monthly range 59 



Highest mean daily 37, 17th 



Lowest mean daily 7, 1st 



Mean maximum 35.7 



Mean minimum 15.1 



Greatest daily range 40, 3rd 



Least daily range 4, 18th 



Precipitation 



Precipitation. In inches 1.80 



Snow, in inches 9.50 



Maximum precipitation in 24 hrs. .59 



9th 

 Number of days on which .01 or 



more inches of rain fell 11 



Wind (miles) 



Total movement 4,378 



Greatest daily movement .... 380, 27th 



Least daily movement 51, 9th 



Mean hourly velocity 6.5 



Maximum velocity for 5 min 39,14th 



(Corrected to conform to 3 cup anemometer) 

 Wind (direction) 



Prevailing direction nw 



North, days 6 



Northeast, days 



East, days 



Southeast, days 2 



South, days 2 



Southwest, days 1 



West, days 2 



Northwest, days 15 



Weather 



Mean relative humidity, per cent. . 73.3 



Mean cloudiness, per cent 55 



Number of clear days 10 



Number of fair days 5 



Number of cloudy days 13 



Number of hours bright sunshine 134.6 

 Percent of possible hours of bright 



sunshine 46 



30.63 



29.20 



30.03 



1.43 



50.3 

 -7.9 

 23.5 



58.2 



3.35 



14.27 



10 



4,833 



7.1 

 29 



77.9 

 50.5 



10 

 8 



10 

 160 



54.4 



31.05, 

 28.56, 



1920 

 1895 



1.89, 1900, 1908; .88, 1913 



65.0, 

 -22.5. 



1930 

 1918 



8.12, 1900; 0.62, 

 48.75, 1893; 2.5, 



1901 

 1912 



15, 1893, 1920; 4, 1901 



6,445, 1896; 3,438, 1892 



42, 1912 



90, 1889; 66.8, 1902 



66, 1890, 1927; 31, 1905 



17, 1924; 2, 1927 



16, 1920; 3, 1890 



16, 1894; 2, 1920 



221, 1924; 110, 1927 



