METEOROLOGICAL TABLES. 



MONTHLY METEOROLOGICAL SUMMARY, LANSING, MICHIGAN, MAY, 1921. 



143 



Date. 



1. 



2. 



3. 



4, 



.5. 



6. 



7. 



8. 



9. 

 10. 

 II. 

 12. 

 13. 

 14. 

 15. 

 16. 

 17. 

 18. 

 19. 

 20. 

 21. 

 22. 

 23. 

 24. 

 25. 

 26. 

 27. 

 28. 

 29. 

 30. 

 31. 



Temperature. 



Highest. 



59 

 42 

 51 

 65 

 71 

 70 

 70 

 72 

 76 

 78 

 72 

 68 

 65 

 49 

 52 

 60 

 65 

 64 

 84 

 88 

 89 

 87 

 85 

 81 

 82 

 76 

 81 

 75 

 86 

 87 

 81 



Lowest. 



33 

 36 

 37 

 40 

 46 

 43 

 42 

 39 

 42 

 46 

 49 

 53 

 49 

 41 

 33 

 30 

 34 

 51 

 51 

 58 

 63 

 64 

 60 

 58 

 59 

 55 

 56 

 63 

 59 

 60 

 60 



Mean. 



46 

 39 

 44 

 52 

 58 

 56 

 56 

 56 

 59 

 62 

 60 

 00 

 57 

 45 

 42 

 45 

 50 

 58 

 68 

 73 

 76 

 76 

 72 

 70 

 70 

 06 

 68 

 69 

 72 

 74 

 70 



Precipita- 

 tion in 

 inches. 























T. 



















T. 

 02 

 03 



T. 











T. 

 07 

















 28 

 57 









 33 

 01 









 02 



Character of 

 day. 



Partly cloudy . . 



Cloudy 



Cloudy 



Partly cloudy . . 



Clear 



Cloudy 



Clear 



Clear 



Clear 



Partly cloudy . . 

 Partly cloudy . . 



Cloudy 



Partly cloudy . . . 



Cloudy 



Partly cloudy . . 



Clear 



Cloudy 



Cloudy 



Clear 



Clear 



Partly cloudy , . . 

 Partly cloudy . . 

 Partly cloudy. . . 



C'loudy 



Clear 



Partly cloudy . . . 



Cloudy 



Cloudy 



Clear 



Clear 



Cloudv 



Percent- 

 age of 

 possible 

 sunshine. 



76 







20 



94 



100 

 41 

 99 



100 



100 

 81 

 72 

 

 49 

 1 

 61 

 99 

 63 

 20 

 86 



100 

 84 

 98 

 77 

 35 

 79 

 92 

 35 

 45 

 81 

 99 

 59 



Mean highest temperature 72 



Mean lowest temperature 48 7 



Mean temperature for month 00 .4 



Total precipitation for month 1 33 



W'eathrr. 



Number days clear : . .- 10 



Partly cloudy : 10 



Cloudy 11 



With 0.01 inch or more of precil.itatiun 8 



Sunshine. 



Number hours sunshine 301 . 



Possible hours sunshine 454 . 7 



Percentage of possible 66 



This month since 1863. 



Year. 



1863 

 1864 

 1805 

 1860 

 1867 

 1868 

 1869 

 1870 

 1871 

 1872 

 1873 

 1874 

 1875 

 1876 

 1877 

 1878 

 1879 

 1880 

 1881 

 1882 

 1883 

 1884 

 1885 

 1886 

 1887 

 1888 

 1889 

 1890 

 1891 

 1892 

 1893 

 1894 

 1895 

 1896 

 1897 

 1898 

 1899 

 1900 

 1901 

 1902 

 1903 

 1904 

 1905 

 1900 

 1907 

 1908 

 1909 

 1910 

 1911 

 1912 

 1913 

 1914 

 1915 

 1916 

 1917 

 1918 

 1919 

 1920 

 1921 



Mean 

 tempera- 

 ture. 



60 2 

 57.6 



55 

 61.1 

 59 1 

 56.0 

 64.3 

 61.4 

 58.5 

 56.9 

 59.6 

 60.8 

 58.0 

 58.2 

 54.6 

 58.8 

 64.3 

 65.2 

 52 7 

 52,8 



56 9 

 55.8 



58 



64 



53 



57 



53 



55 



54 



54 



56.9 



61.8 



66.5 



55.8 



56.5 



58.8 



58.8 



55.2 



58.4 



59.5 



57.4 



56.7 



56.6 



51.2 



59.6 



55.8 



51.5 



63.5 



57.6 



56.2 



58.6 



51.5 



56 



50 



61 



54 



55 



60 



Total 



precipta- 



tion. 



2 87 



1.77 



48 



80 



80 



05 



16 



1.97 



3.72 



3.05 



1.77 



4 46 



4.13 



2.23 



3.44 



2.45 



5.59 



2.11 



4.04 



5.66 



3.95 



2.30 



2.67 



2.42 



66 



61 



.63 



.92 



.86 



.83 



.06 



.14 



.29 



.15 



.59 



.17 



.42 



.92 



2.63 



2.40 



5.17 



3.05 



22 

 59 

 44 

 13 

 07 

 57 



2.22 

 4.66 



74 

 13 

 37 

 89 

 29 

 1.43 

 1.33 



B.^ROMETER— Mean, 30.02 inches; highest, 30.34 inches, on 16; lowest, 29.74 inches, on 13. 



Temper.\ture— Highest, 89°, on 21 ; lowest, 30°, on 16; greatest daily range, 34°, on 9; least daily range, 6°' on 2; normal temper- 

 ature, 57.1°; departure, +3.3°; accumulated departure since January 1, +918°; average daily departure since January 1, +6.1°; 

 highest in 36 years, 95°; lowest, 17°. 



Precipit.^tion (in inches) — Total this month, 1.33; normal, 3.5S; departure, — 2.25; since January 1st, — 2.36; greatest amount 

 in 24 hours, 0.85, on 23 and 24; total snowfall, 0.0 in. 



Wind — Prevailing direction west; total movement, 4,342 miles; average hourly velocity, 5.8 miles; maximum velocity, 20 miles 

 per hour from northwest, on 13. 



Dates oi?— Auroras, 13, 15, 16; hail, 0; sleet, 0; fog, dense, 0; thundenstorms, 23, 24, 27, 30, 31; halos: solar, 4, 17, 23, 24. 

 lunar, 0; frost: killing, 16; heavy, 0; light, 1, 15, 17. 



DEWEY A. SEELEY, 



Meteorologist. 



