METEOROLOGICAL TABLES. 153 



Monthly Meleorological Summary, Lansing, Michigan, May, 1920. 



Date. 



1 

 2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 



10 

 11 

 12 

 13 

 14 

 1.5 

 16 

 17 

 18 

 19 

 20 

 21 

 22 

 23 

 24 

 25 

 26 

 •27 

 28 

 29 

 30 

 31 



Temperature. 



Highest 



Mean. 



44 

 40 

 44 

 47 

 48 

 52 

 55 

 52 

 54 

 60 

 49 

 48 

 42 

 44 

 45 

 50 

 52 

 58 

 62 

 61 

 61 

 65 

 68 

 59 

 66 

 66 

 68 

 60 

 58 

 62 

 08 



Precipita- 

 tion in 

 inches. 

































 01 

 07 

 32 





















 78 

 01 

 20 

 01 









 03 



































Character of 

 day. 



Clear 



Clear 



Partly Cloudy 

 Partly Cloudy 



Clear 



Partly Cloudy 



Cloudy 



Partly Cloudy 

 Partly Cloudy 



Cloudy 



Cloudy 



Cloudy 



Cloudy 



Partly Cloudy 



Clear 



Pa^rtly Cloudy 



Cloudy 



Cloudy 



Cloudy 



Partly Cloudy 



Clear 



Partly Cloudy 



Cloudy 



Cloudy 



Partly Cloudy 



Clear 



Partly Cloudy 

 Partly Cloudy 

 Clear 



Partly Cloudy 

 Partly Cloudy 



Percent- 

 age of 

 possible 

 sunshine. 



100 



100 



98 



99 



100 



100 



100 



94 



72 



63 



37 



42 



63 



96 



100 



85 







10 



47 



68 



93 



75 



40 



13 



79 



100 



95 



100 



100 



80 



68 



Mean highest temperature 67 .7 



Mean lowest temperature 42 . 5 



Mean temperature for month . . . .' 55 . 1 



Total precipitation for month 1 .43 



Weather. 



Number days clear 7 



Partly cloudy 14 



Cloudy 10 



With 0.01 or more of precipitation 8 



Sunshine. 



Number hours sunshine 339 2 



Possible hours sunshine 454 7 



Percentage of possible 75 



This month since 1863. 



Year. 



1863 

 1864 

 1«65 

 1866 

 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 

 1906 

 1907 

 1908 

 1909 

 1910 

 1911 

 1912 

 1913 

 1914 

 1915 

 1916 

 1917 

 1918 

 1919 

 1920 



Mean 

 tempera- 

 ture. 



60 2 

 57.6 

 55.0 

 61.1 

 59.1 

 56.0 

 64.3 

 61.4 

 58.5 

 56.9 



59 6 



60 8 

 58 

 58.2 

 54.6 

 58.8 

 64 3 

 05 2 

 52 7 



52 8 



56 9 

 55.8 

 58.1 

 64 3 



53 7 



57 4 

 53.7 

 55.7 

 54.5 

 54.4 

 56.9 

 61.8 

 66 5 

 55 8 

 50.5 

 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 



Total 

 precipita- 

 tion. 



2.87 

 1.77 

 3.48 

 3.80 

 2.80 

 2.05 

 1.16 

 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 

 3.66 

 3.61 

 4.98 

 1.63 

 5.92 

 2.86 

 4.83 

 2.06 

 3.14 



3 29 

 2 15 

 3.59 

 4.17 



42 

 92 

 63 

 40 

 17 

 05 

 22 

 59 



2.44 

 4.13 

 2.67 

 6.57 

 2.22 



66 

 74 

 13 

 37 



89 

 29 

 4:i 



Barometer— Mean, 30.09 inches; highest, 30.51 inches, on 16th; lowest, 29.79 inches, on 19th. 



Temperature— Highest, 82°, on 26th; lowest, 28°, on 3rd; greatest daily range, 37°, on'9lh; least daily range, 9°,on 17th. 

 Normal for month, 57.1°; excess or deficiency this month, —2.0°. Accumulated excess or deficiency since January 1st, —490°; 

 average daily, same period, —3.2°. Highest in 35 years, 95°; lowest, 17°. 



Precipitation (in inches) — Total amount, 14.3; normal, 3.58; excess or deficiency this month, —2.15; since January 1st, 

 —2.16. Greatest amount in any 24 hour period, 0.79, on 17th and 18th. Total snowfall, 0.0 inches. 



Wind — Prevailing direction, northeast. Total movement, 4,186 miles; average hourly velocity, 5.6 miles. Maximum velocity 

 23, from the west, on 9th. 



Dates op— Auroras, 0; hail, 0; thunderstorms, 23; halos: solar, 7, 8, 12, 21, 22, 28; lunar, 0. Frost: killing, 1, 2, 3, 5, 14, 15; 

 heavy, 4; Ught, 6, 16. 



DEWEY A. SEELEY, 



Meteorologist. 



