METEOROLOGICAL TABLES. 



MONTHLY METEOROLOGICAL SUMMARY, LANSING, MICHIGAN, SEPTEMBER, 1920. 



135 



B.vROMETER— Mean, 30.02 inches; highest, 30.34 inches, on 3rd; lowest, 29.68 inches, on r2th. 



Temperature— Highest, 91°, on 25th; lowest, 37°, on 30th; greatest daily range, 36°, on 21st; least daily range, 14°, on 5th; 

 normal for month, 61.6°; e.xcess or deficiency this month, -f2.6°; accumulated e.xcess or deficiency since January 1st, —523°; 

 average daily, same period, — 1.9°; highest in 35 years, 99°, lowest, 21°. 



Precipitation (in inches)— Total amount, 1.26; normal, 2.02; excess or deficiency this month, —1.36; since January 1st, —3.59; 

 greatest amount in any 24 hour period, 0.58, on loth; total snowfall, 0.0 in. 



Wind— Prevailing direction, south; total movement, 3,288 miles; average hourly velocity, 4.6 miles; maximum velocity, 22, 

 from the southwest, on 28th. 



D.\TEs OF— .Auroras, 7; dense fog, 0; thunderstorms, 9, 11, 15, 28, 27; halos: solar, 27; lunar, 22; frost: killing, 0; heavy, 30; 

 light, 3. _ 



DEWEY A. SEELEY, 



Meteorologist. 



