THE NORTHEKN HABDWOOD FOEEST. 



Table 1 . — Temperature and precipitation 1 within the northern hardwoods and the north- 

 ern edge of the southern hardwood regions. Based on data from United States Weather 

 Bureau Bulletin Q (1906); observations extending over period of from 5 to 50 years. 





Average monthly temperature. 



Average 

 tempera- 



Geographical division and forest 

 region. 



Apr. 



Growing season. 



Oct. 



ture for 

 the 





May. 



June. 



July. 



Aug. 



Sept. 



growing 

 season. 



New England and the Adirondacks: 

 Northern hardwood 



° F. 

 41 

 44 



46 

 50 



41 



47 



42 

 47 



° F. 

 54 

 56 



59 

 62 



53 



58 



54 

 59 



°F. 



62 

 65 



66 



68 



63 

 67 



63 

 67 



° F. 

 66 

 70 



69 

 72 



68 

 72 



67 

 71 





F. 

 64 

 67 



67 

 71 



64 

 70 



65 

 69 



° F. 

 57 

 60 



62 

 64 



57 

 62 



58 

 62 



° F. 

 46 



48 



50 

 54 



45 

 50 



46 

 51 



" F. 



61 

 64 



Alleghenies and Southern Appala- 

 chians: 



65 





67 



Lake States: 



61 





66 



General average: 



61 





66 







Geographical division and forest 

 region. 



Average precipitation. 



Average total 

 precipitation. 



Aver- 

 age an- 



Apr. 



Growing season. 



Oct. 



Grow- 

 ing 



season. 



An- 

 nual. 



nual 

 snow- 





May. 



June. 



July. 



Aug. 



Sept. 



fall. 



New England and the Adiron- 

 dacks: 



In. 

 2.4 

 2.9 



3.4 

 3.1 



2.3 



2.4 



2.5 

 2.9 



In. 

 3.3 

 3.5 



4.1 

 3.9 



3.5 

 3.3 



3.6 

 3.6 



In. 

 3.9 

 3.8 



5.6 

 4.6 



3.8 



3.8 



4.2 

 4.1 



In. 



4.4 

 4.1 



4.9 

 4.7 



3.8 

 3.5 



4.2 

 4.2 



In. 

 4.1 



3.8 



4.7 

 3.5 



3.6 

 3.0 



4.0 

 3.4 



In. 

 3.7 

 3.5 



3.6 

 3.1 



3.4 

 3.0 



3.5 

 3.2 



In. 

 3.3 

 3.6 



3.8 

 2.5 



3.1 



2.4 



3.3 



2.8 



Inches. 

 19.4 

 18.7 



22.9 

 19.8 



18.1 

 16.6 



19.0 

 18.5 



Inches. 

 42.8 

 44.8 



49.2 

 41.8 



31.1 

 29.9 



38.4 

 39.2 



Inches. 

 96.1 





78.1 



Alleghenies and Southern Appa- 

 lachians: 



58.5 





32.4 



Lake States: 



Northern hardwood 



64.0 





40.1 



General Average: 



75.5 





48.4 



























1 Monthly averages for the growing season — May to September, inclusive — and for April and October, 

 with average annual precipitation and snowfall. 



The stations and altitudes at which the observations were taken 

 are as follows : 



Northern hardwoods: 



New England — Feet. 



Mayfield, Me 1, 000 



Bethlehem, N. H 1,470 



Stratford, N. H 950 



Wells, Vt 1,000 



Jacksonville, Vt 1, 000 



Saranac Lake, N. Y 1, 620 



Number Four, N. Y 1, 571 



Alleghenies and Southern Ap- 

 palachians — 



LeRoy, Pa 1,400 



State College, Pa 1,191 



Terra Alta, W. Va 3, 207 



Linville, N. C 3,800 



Lake States — 



Calumet, Mich 1,246 



Escanaba, Mich 594 



Grayling, Mich 1, 147 



Ivan, Mich. 



Northern hardwoods — Continued. 



Lake States — Continued. Feet. 



Koepenick, Wis 1, 675 



Medford, Wis 1, 420 



Grantsburg, Wis 1,095 



Mount Iron, Minn 1, 510 



Sandy Lake Dam, Minn. . 1, 229 



Park Rapids, Minn 1, 300 



Southern hardwoods: 



Lewiston, Me 210 



Concord, N. H 280 



Rome, N. Y 450 



Pittsburgh, Pa 757 



Elkins, W. Va 1, 920 



Hot Springs, Va 2, 195 



Asheville, N. C 2, 255 



Lansing, Mich 881 



Madison, Wis 974 



St. Paul, Minn 758 



