198 



THE CT.i:siATE OF PRIXCE GEOEGE S COUXTY 



TABLE XII. 

 Monthly and Axxual Mean Tempeiiaturks at Fort Washington.* 



Year. 



1824 . 

 18::5. 

 1826. 

 1827. 

 1828. 

 1S29. 

 1830. 

 1831. 

 1833. 

 1833. 

 1834. 

 1835. 

 1851. 

 1852. 

 1853. 

 1868. 

 1869. 

 1870. 

 1871. 

 1872. 



Mean. 



Jan. 



42.7 

 37.4 

 38.4 

 31.2 

 42.6 

 33.7 

 35.2 

 35.5 

 35.5 

 38.6 

 31.3 

 31.8 



Feb. Mar. 



Apr.. May IJuae July Aug. Sept. 



38.4 45.3 



40.5 50.1 



43.5 51.2 

 46.1 51. i 

 48.0 49.0 

 28.3 41.0 

 36.0 49.4 

 31.3 50.6 



38.6 I 46.9 



38.7 43.5 

 45.6 44.4 

 28.9 43.0 



56.5 

 58.9 

 54.7 

 62.7 

 52.1 

 57.9 

 60.7 

 59.4 

 56.7 

 62.0 

 55.8 

 57.1 



29.3 

 34.0 



37.1 45.3 EO.l 



39.2 44.7 55.3 



40.6 

 41.2 



31.9 

 35.9 



40.5 42.6 54.1 



35.5 39.9 53.6 

 50.5 60.2 



33.6 35.9 55.7 

 38.2 4.5.8 50.9 



66.0 

 66.9 

 74.0 

 66.2 

 69.4 

 70.3 

 69.4 

 69.2 

 67.1 

 73.4 

 64.9 

 68.3 

 66.0 

 67.3 

 65.8 

 64.1 

 61.0 

 64.1 

 65.5 

 67.6 

 67.3 



75.1 I 79.6 

 .2 ; 81.5 



.8 78.6 



5.1 68.3 



3.7 j 69.8 

 ^8 73.3 



4.4 80.0 77.0 69.6 



67.9 

 70.8 

 71.2 



6.2 77.4 77.4 



7.3 83.6 79.1 

 73.5 79.4 77.7 



6.5 81.1 77.3 69.9 



6.2 82.6 78.4 73.6 



9.2 83.0 79.8 71.4 



6.4 78 2 73.2 62.9 



72.2 78.5 74.6 



3.2 78.6 I 72.4 



6.6 77.6 i 78.0 



1 



3.5 81.1 I 76.5 



2.3 76.6 ! 75.8 

 4.9 79.0 77.1 

 5.3 75.8 78.8 

 5.2 80.6 79.3 

 5.8 80.1 I 77.1 



68.1 

 67.4 

 69.9 

 69.1 

 68.4 

 69.6 

 65.1 



Oct. Nov. I Dec. Annu'l 



59.2 

 63.6 

 61.7 

 60.2 

 60.0 

 58.2 

 62.1 

 61.7 

 59.1 

 56.5 

 56.5 

 59.7 

 58.0 

 60.6 

 59.8 

 56.2 

 51.2 

 58.7 

 59.7 



47.5 43.0 



47.3 39.1 

 49.8 I 40.2 ■ 

 46.8 41.3 



49.6 33.3 .. 

 45.1 40.3 



53.8 38.4 



46.0 26.2 



50.9 39.9 



47.1 38.2 



43.2 37.9 

 49.8 34.4 

 43.1 31.2 .. 

 43.8 42.1 



47.4 38.0 



47.5 33.0 ., 

 40.4 37.8 



46.7 34.9 



44.6 32.6 .. 



55.3 



55.6 



59.1 46.9 37.3 



TABLE XIII. 

 Monthly and Anndal Precipitation at Fort Washington in Inches. 



♦Fort Washington was one of the 

 meteorological work originated and 

 unfortunately there were two serious 

 from 1853 to 1868. The work here 

 upon the establishment of the United 



very first of the military posts to take up the 

 carrhxl on by the Surgeon-General's Office, but 

 interruptions : one from 1835 to 1851. and again 

 as at many other .\rmy Posts was discontinued 



States Weather Bureau. 



