148 STATE BOARD OF AaRICULTURB. 



MoJithly Meteorological Summary, Lansing, Michigan, December, 1919. 



Date. 



1 



2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 

 10 



u 



12 

 13 

 14 



15 

 16 

 17 

 18 

 1!) 

 20 

 21 

 22 

 %<, 

 24 

 2.) 

 20 

 27 

 28 

 29 

 30 

 31 



Temperature. 



Highest. 



Lowest. 



23 

 20 

 22 

 30 

 30 

 30 

 32 

 27 

 31 

 20 

 30 

 43 

 35 

 16 

 14 

 14 

 10 

 15 

 22 

 26 

 3(1 

 2il 

 30 

 29 

 28 

 37 

 33 

 21 

 34 

 33 

 37 



17 



4 



2 



10 



24 



24 



24 



20 



20 







-2 



27 



14 



10 



1 



2 



—5 







4 



2 



18 



23 



22 



'5 



ft 



28 



21 



6 



7 



23 



21 



Mean. 



20 

 12 

 12 

 20 

 27 

 27 

 28 

 24 

 26 

 10 

 14 

 35 

 24 

 13 

 8 

 8 

 2 

 8 

 13 

 14 

 24 

 26 

 26 

 17 

 14 

 32 

 27 

 14 

 20 

 28 

 29 



Precipita- 

 tion in 

 inches. 



Character of 

 daj'. 



04 

 0.02 



T. 







T. 

 45 

 02 





 10 

 02 



T. 







T. 

 01 

 01 

 OS 







(I 







T. 



T. 



T. 

 02 



T. 



T. 



T. 

 0.01 



T. 

 07 





 0.01 



Cloudy 



Partly Cloudy 

 Partly Cloudy 



Clear 



Cloudy 



Cloudy 



Cloudy 



Cloudy 



Cloudy 



Partly Cloudy 



('loudv 



Cloudy 



Cloudy 



Cloudy 



Partl.v" Cloudy 



Cloudy 



Clear 



Cloudy 



Clear." 



Partly Cloudy 



Cloudy 



Cloudy 



Cloudy 



Partly Cloudy 



Cloudy 



Cloudy 



Cloudy 



Partly Cloudy 



Gloudy 



Cloudy 



Partly Cloudy 



Percent- 

 age of 

 possible 

 sunshine. 



16 



79 



48 



100 











38 



42 







75 



25 



59 



7 



0- 



40 







100 



34 



100 



73 



53 











69 



4 











57 







40 



74 



Mean highest temperature 26.8 



Mean lowest temperature 12.0 



Mean temperatiu-e for month 19.4 



Total precipitation for month . 86 



Weather. 



Number days clear 3 



Partly cloudy 8 



Cloudy 20 



With 0.01 or more of precipitation 13 



Sunshine. 



Number hours .sunshine 106 . 6 



Possible hours sunshine 280 8 



Percentage of possible 38 



This month since 1863. 



Year. 



1863 



1864 

 1865 

 1806 

 1867 

 1868 

 1869 

 1870 

 1871 

 1.S72 

 1813 

 1874 

 1875 

 1876 

 1 877 

 1878 

 1879 

 1,S80 

 1881 

 1882 

 1883 

 1884 

 1885 

 1880 

 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 



Mean 

 tempera- 

 ture. 



24 4 

 26.7 

 25.5 



25 3 

 21 2 



28 2 

 24 8 

 21 1 

 15 7 



29 5 

 27 

 31 

 15 2 



30 f) 



21 3 



27 5 



22 1 

 34 3 

 24 8 



26 4 



24 7 

 27.8 

 19 7 

 27.3 

 30 4 

 30 8 

 26.4 

 34 6 



25 6 

 27.6 



30 1 



28 5 

 28.1 

 25 6 

 24.8 

 25.0 

 26.7 

 21.6 

 24.8 

 19.7 

 21.7 

 30.2 

 26.8 

 22.7 

 20.4 

 23.0 

 21.0 



31 1 

 31.0 

 31.8 

 21.6 

 24.8 

 22.7 

 19.1 



32 9 

 19.4 



Total 

 precipita- 

 tion. 



71 



20 



1 43 



90 

 34 



1 35 



2 11 



2 .57 

 1 76 



1 06 



3 02 



37 



2 80 



1 29 



1 03 



2 27 



3 55 



85 



1 75 



88 



1 28 



4 15 



2 14 

 1.56 



3 32 



1 20 

 2.61 

 1.12 

 1.47 

 1.52 

 2.28 

 0.93 



5 39 

 80 

 2.02 

 1.42 

 1.51 



50 

 3 00 



2 89 

 1.75 



1 42 

 2.54 



85 

 19 

 08 

 91 

 28 

 58 

 20 

 0.55 

 1.57 

 1.01 

 2.11 

 74 



3 61 

 86 



Barometbr— Mean, 30.12 inches; Highest, 30.78 inches, on lOth; lowest, 29.43 inches, on 29th. 



Tkmpkratuhk — Highest, 43°, on 12th; lowest, —.5°, on 17th; greatest daily range, 32°, on 11th; least daily range, 0°, on 0th. 

 Normal for month, 20.8°; excess or deficiency this month, —7.4°. Accumulated e.xcess or deficiency since January 1st ,-{-365°: 

 average daily, same period, +1.0°; highest in 34 years, 02°, lowest, —24°. 



Precipitation (in inches) — Total amount, 0.80; normal, 2.08; excess or deficiency this month, —1.22; since January Is'., 

 -|-0.39. Greatest amount in any 24 hour period, 0.45, on 6tli. Total snowfall, 10.2 inches. 



Wind — Prevailing direction, northwest. Total movement, 5,240 miles; average hourly velocity, 7.0 miles; maximum velocity 

 24, from the northwest, on 29th. 



Dates of— Auroras, 0; fog, dense, 0; hail, 0; thunderstorms, 0; halos: solar, 1, 15, 16, 18, 29, 31; lunar, 0; Frost; killing, — 

 heavy, — ; light, — . 



DEWEY A. SEELEY. 



Meteorologist. 



