CLIMATIC CONDITIONS OF THE UNITED STATES. 



175 



Table 2. — Frost data and length of average frostless season for 1803 stations in the 

 United States. (Plate 34.) — Continued. 



Station. 





Michigan — Continued: 



Grand Rapids (62) 



Grayling (63) 



Harbor Beach (63) 



Harrison (63) 



HarrisvUle (62) 



Hart (61) 



Hastings (H) 



Houghton (61) 



Hunibolt (61) 



Iron River (61) 



Ivan (H) 



Kalamazoo (62) 



Lansing (63) 



Mancelona (62) 



Manistee (62) 



Marquette (61) 



Menominee (61) 



Muskegon (62) 



Newberry (61) 



Olivet (62) 



Omer (63) 



Port Huron (63) 



Saginaw, W. S. (63) 



St. Ignace (61) 



St. Joseph (62) 



Saranac (62) 



Sault Ste. Marie (61) 



Thomaston (61) 



Traverse City (62) 



Wasepi (62) 



Whitefish Point (61) 



Minnesota: 



Bird Island (55) 



CoUegeville (56) 



Crookston (57) 



Duluth (58) 



Fairmont (n) (55) 



Fergus Falls (55) 



Grand Meadow (56) 



Lake Winnibigoshish (57). 



Long Prairie (55) 



Luverne (H) 



Lynd (55) 



Milan (55) 



Minneapolis (56) 



Moorhead (57) 



Morris (55) 



Mt. Iron (57) 



New London (55) 



New Ulm (55) 



Park Rapids (57) 



Pine River Dam (56) 



Red Wing (56) 



Rolling Green (H) 



St. Charies (56) 



Altitude. 



feet. 

 707 



1,147 

 635 



1,159 

 616 

 698 

 770 

 668 



1,536 



1,504 



955 

 820 



1,121 

 600 

 734 

 581 

 587 

 773 

 934 

 616 

 639 

 601 

 593 

 593 

 639 

 614 



1,347 

 588 

 842 

 610 



1,039 

 1,282 



863 

 1,133 



753 

 1,210 

 1,338 

 1,300 

 1,299 

 1,480 

 1,175 



995 



918 



903 

 1,170 

 1,510 

 1,215 



791 

 1,426 

 1,251 



708 

 1,240 



850 



No. of 



years of 



record. 



15 

 9 

 9 



8 

 8 

 4 



10 

 11 

 10 



9 

 11 



8 



6 

 21 



9 



Q 



5 

 9 

 8 



35 

 9 

 7 

 6 

 7 



22 



10 

 8 



10 

 9 



16 

 16 

 16 

 39 

 16 

 17 

 16 

 12 

 16 



15 

 16 

 18 

 28 

 17 

 15 

 15 

 16 

 16 

 15 

 9 



Average date of — 



Last frost 

 in spring. 



16 



May 1 



May 18 



May 11 



May 17 



May 16 



May 13 



May 10 



May 8 



June 7 



June 3 



May 23 



May 4 



May 4 



May 24 



May 13 



May 15 



May 16 



May 5 



May 29 



May 7 



May 28 



May 7 



May 9 



May 11 



Apr. 17 



May 13 



May 14 



June 8 



May 17 



May 4 



May 17 



May 9 



May 7 



May 15 



May 4 



May 6 



May 11 



May 16 



May 22 



May 18 



May 11 



May 12 



May 14 



Apr. 29 



May 13 



May 12 



June 3 



May 9 



May 6 



May 20 



May 18 



May 4 



May 4 



May 16 



First frost 

 in autumn. 



Oct. 12 



Sept. 18 



Oct. 5 



Sept. 27 



Oct. 4 



Oct. 1 



Sept. 15 



Oct. 7 



Sept. 5 



Sept. 15 



Sept. 14 



Oct. 7 



Oct. 9 



Sept. 28 



Oct. 3 



Oct. 2 



Oct. 6 



Sept. 29 



Sept. 11 



Oct. 5 



Sept. 13 



Oct. 9 



Oct. 1 



Sept. 28 



Oct. 12 



Oct. 2 



Sept. 29 



Sept. 1 



Oct. 5 



Oct. 11 



Oct. 10 



Sept. 25 



Sept. 28 



Sept. 22 



Oct. 3 



Oct. 3 



Sept. 22 



Sept. 25 



Sept. 24 



Sept. 23 



Sept. 19 



Sept. 25 



Sept. 21 



Oct. 7 



Sept. 22 



Sept. 25 



Sept. 9 



Sept. 30 



Sept. 27 



Sept. 19 



Sept. 20 



Oct. 11 



Oct. 3 



Sept. 27 



Length of 

 average 

 frostleaa 

 season. 



days. 



164 



123 



147 



133 



141 



141 



128 



152 



92 

 104 

 114 

 156 

 158 

 127 

 143 

 140 

 143 

 147 

 105 

 151 

 108 

 155 

 145 

 140 

 178 

 142 

 138 



85 

 141 

 160 

 146 



139 

 144 

 130 

 152 

 150 

 134 

 132 

 125 

 128 

 131 

 136 

 130 

 161 

 132 

 136 

 98 

 144 

 144 

 122 

 125 

 160 

 152 

 134 



