METEOROLOGICAL TABLES. 147 



Monthly Meteorological Summary, Lansing, Mich., September, 1918. 



Date. 



1. 



2. 



3. 



4. 



5. 



6, 



7. 



8. 



9. 

 10. 

 H. 

 12. 

 13. 

 14. 

 15. 

 16. 

 17. 

 18. 

 19. 

 20. 

 21. 

 22. 

 23. 

 24. 

 25. 

 26. 

 27. 

 28. 

 29. 

 30. 

 31. 



Temperature. 



Highest. 



Lowest. 



Mean. 



64 

 67 

 65 

 55 

 56 

 54 

 60 

 60 

 65 

 52 

 52 

 56 

 56 

 58 

 60 

 50 

 52 

 52 

 46 

 46 

 46 

 47 

 56 

 56 

 54 

 44 

 50 

 56 

 46 

 44 



Precipita- 

 tion in 

 inches. 







T. 







1.42 











0.25 















0.39 



0.26 







0.04 



0.10 



0.18 







0.03 



0.01 



0.02 



T. 











05 



0.12 















0.01 







Character of 

 day. 



Clear 



Cloudy 



Partly cloudy. 



Cloudy 



Partly cloudy . 

 Partly cloudy . 

 Partly cloudy . 



Clear 



Cloudy 



Clear 



Cloudy 



Cloudy 



Partly cloudy . 

 Partly cloudy . 



Cloudy 



Cloudy 



Partly cloudy . 



Cloudy 



Cloudy 



Cloudy 



Cloudy 



Partly cloudy. 

 Partly cloudy. 



Cloudy 



Partly cloudy . 

 Partly cloudy . 



Clear 



Clear 



Cloudy 



Partly cloudy . 



Percent- 

 age of 

 possible 

 sunshine. 



Mean highest temperature. . . 

 Mean lowest temperature. . . . 

 Mean temperature for month . 

 Total precipi tation for month . 



100 



9 

 45 





 75 

 68 

 60 

 94 

 41 

 88 





 15 

 43 

 62 

 10 





 78 

 15 

 16 

 10 

 56 

 48 

 37 

 21 

 56 

 87 

 100 

 89 

 36 

 75 



65.0 

 43.3 

 .54.2 



2.88 



Weather. 



number days clear 



Partly cloudy 



Cloudy 



With 01 or more of precipitation . 



Sunshine. 



Number hours sunshine 178.4 



Possible hours sunshine 374.8 



Percentage of possible 48 



This month since 1863. WF 



Year. 



1863 

 1864 

 1865 

 1866 

 1867 

 1868 

 1869 

 1870 

 1871 

 1872 

 1873 

 1874 

 1875 

 1876 

 1877 

 1878 

 1897 

 1880 

 1881 

 1882 

 1883 

 1884 

 1885 

 1886 

 1987 

 1888 

 1889 

 1890 

 1891 

 1892 

 1893 

 1894 

 1895 

 1896 

 1897 

 1898 

 1899 

 1900 

 1901 

 1902 

 1903 

 1904 

 1905 

 1906 

 1907 

 1908 

 1909 

 1910 

 1911 

 1912 

 1913 

 1914 

 1915 

 1916 

 1917 

 1918 



Mean 

 tempera- 

 ture. 



59.6 

 67.7 

 55.8 

 .56.6 

 58.8 

 63.5 

 63 7 

 59.1 

 62.0 

 67.4 

 62.8 

 58.5 

 56.3 

 61.3 

 63.2 

 56.2 

 55.8 

 69.7 

 59.9 

 56.4 

 65.1 

 .58.9 

 62.1 

 58.9 

 57.8 

 61.2 

 57.7 

 65.1 

 60.8 

 58.4 

 63.7 

 66.6 

 57.6 

 62.9 

 63.3 

 57.0 

 63.2 

 61.7 

 .58.7 



61 



62 

 63.8 

 67.5 

 61.8 

 66.4 

 60.4 

 60.2 



61.6 

 62.7 

 61.0 

 60.3 

 63.2 

 60.4 

 58.6 

 54.2 



Total 

 precipita- 

 tion. 



0.89 

 3.53 

 4.79 

 5.80 

 1.42 

 2.95 

 1.43 

 2.85 

 0.79 

 5.21 

 3.50 

 1.27 

 2.89 

 3.65 

 1.38 

 3.41 

 3.19 

 3.10 

 2.91 



0.67 

 2.34 

 3.34 

 3.75 

 5.40 

 4.72 

 1.89 

 0.79 

 1.67 

 1.10 

 2.17 

 1.84 

 2.59 

 0.85 

 6.73 

 0.80 

 3.00 

 2.14 

 0.89 

 1.67 

 5.88 

 2.86 

 2.35 

 3.21 

 0.76 

 4.68 

 0.65 

 1.51 

 2.74 

 5.05 

 3.33 



53 

 65 

 55 

 17 

 60 



2.88 



Barometer— Mean, 30.07 inches; highest, 30.52 inches, on 10th; lowest, 29.62 inches, on 18th. 



Temperature— Highest, 79°, on 1st; lowest, 34°, on 27th; greatest daily range, 32 on 27th; least daily range, 6° on 4th; r. ormal 

 for month, 61.6°; excess or deficiency this month. — 7.4°. accumulated excess or deficeiney since January 1st,— 443°; average 

 daily, same period, —2.6°; highest in 33 years, 99°, lowest, 213. 



Precipitation (in inches)— Total amount, 2.88; normal, 2.62 excess or deficiency this month, ±0.26; since January 1st,— 2.45; 

 greatest amount in any 24 hour period, 1.42, on 4th; total snowfall , 0.0 inches. 



Wind — Prevailing direction, southwest; total movement, 3,478 miles; average hourly velocity, 4.8 miles, maximum velo ity 

 18, from the southwest, on the 18th. 



Dates of— Auroras, 0; fog, dense, 0; hail, 12; thunderstorms, 7, 12, 18; Halos: solar, 2, 17; lunar, 17; frost: killing, heavy, 

 22, 26, 27, 29; light, 6, 17. 



DEWEY A. SEELEY, 



Meteorologist. 



