Native: Vegetation 
i5 
TABLE V.—FROST DATA FOR REPRESENTATIVE COLORADO STATIONS. 
(Data available ud to and including year 1915). 
Station 
County 
Altitude 
in Feet 
Average 
Date Last 
Spring Frost 
Latest Date 
Last Spring 
Frost 
Average 
Date First 
Fall Frost 
--- 
9 
Arriba . 
. Lincoln . 
5240 
May 
21 
June 7 
Oct. 4 
Ashcroft . 
.Pitkin . 
9483 
July 
1 
July 28 
Sept. 1 
Boulder . 
. Boulder . 
5347 
Apr. 
29 
May 20 
Oct. 12 
Buena Vista. ... 
. Chaffee . 
7955 
June 
3 
June 28 
Sept. 20 
Burlington . . . 
.Kit Carson.. . . 
4160 
May 
3 
May 27 
Oct. 8 
C'alhan . . 
. El Paso. 
6700 
May 
15 
May 27 
Sept. 28 
Canon City . . . 
. Fremont. 
. .5343 
Apr. 
28 
May 23 
Oct. 11 
Castle Rock . .. 
• Douglas . 
6220 
May 
14 
June 10 
Sept. 21 
Cedaredge . 
• Delta . 
6175 
May 
16 
June 9 
Sept. 8 
Cheyenne Wells 
. Cheyenne .... 
4279 
May 
3 
May 26 
Oct. 6 
Collbran . 
.Mesa. 
6000 
May 
16 
June 8 
Sept. 26 
Colorado Spgs.. 
. El Paso ...... 
6098 
May 
6 
May 23 
Oct. 2 
Cope . 
.Washington , . 
4250 
May 
6 
May 28 
Oct. 5 
Delta . 
.Delta . 
4965 
May 
11 
May 28 
Sept. 27 
Denver . 
.Denver ... 
5272 
May 
4 
June 6 
Oct. 7 
Durango . 
. La Plata .... 
6534 
May 
17 
June 5 
Sept. 25 
Ft Collins . 
. Larimer . 
4985 
May 
5 
May 21 
Sept. 26 
Ft. Morgan .... 
.Morgan . 
4319 
May 
6 May 25 
Sept. 30 
Frances . 
. Boulder . 
9300 
May 
31 
June 20 
Sept. 20 
Fruita . 
• Mesa. 
4510 
Apr. 
30 
May 22 
Oct. 3 
Garnett . 
. Costilla . 
7576 
June 
6 July 7 
Sept. 12 
Glenwood Spgs.. 
. Garfield . 
5823 
May 
22 
June 19 
Sept. 18 
Grand Valley... 
. Garfield . 
5089 
Apr. 
3 
May 27 
Oct. 7 
Grand Junction..Mesa ... 
Greeley.Weld ... 
Gunnison .Gunnison 
• • • • 
Hoeline.Las Animas... 
Holly .Prowers. 
Idaho Springs. . .Clear Creek. .. 
4602 
4649 
7670 
5700 
3380 
Apr. 18 
May 1 
June 28 
May 17 
Apr. 25 
May 14 
May 21 
July 28 
July 4 
May 27 
Oct. 19 
Oct. 
Sept. 
1 
1 
7543 May 20 June 7 
Lake City.Hinsdale 
8686 
Lake Moraine... El Paso. 10265 
Lamar.Prowers 
Las Animas .... Bent . . 
Lay.Moffat . 
Leadville .Lake . . 
LeRoy.Logan . 
Longmont .Boulder 
Long’s Pk (nr.).Larimer 
3592 
3899 
6190 
10248 
4388 
4950 
8600 
June 11 
June 19 
Apr. 23 
Apr. 27 
June 11 
June 17 
May 3 
May 3 
June 29 
June 24 
July 24 
May 14 
May 20 
July 9 
July 28 
May 27 
May 19 
July 31 
Oct. 2 
Oct. 11 
Sept. 18 
Sept. 9 
Oct. 8 
Oct. 6 
Sept. 5 
Sept. 12 
Oct. 1 
Oct. 1 
Aug - . 30 
Mancos .Montezuma 
Meeker .Rio Blanco 
. 6960 June 6 July 6 Sept. 2 
. 6182 June 13 July 4 Sept. ] 
Montrose .Montrose . 5811 May 12 June 8 Sept. 27 Sept. 14 137 113 
Moraine.Larimer . 7775 June 14 July 20 Sept. 10 Aug. 22 
Pueblo .. Pueblo . 4734 Apr. 27 May 23 Oct. 7 
Earliest Date 
First Fall 
Frost 
Aver. Length 
Frostless Seas. 
Shortest Frost¬ 
less Season 
Sept. 20 
133 
119 
Aug. 1 
61 
28 
Sept. 15 
166 
125 
Sept. 8 
108 
91 
Sept. 25 
158 
137 
Sept. 2 
138 
111 
Sept. 17 
166 
136 
Sept. 10 
132 
99 
Sept. 10 
129 
95 
Sept. 12 
157 
122 
Sept. 12 
132 
114 
Sept. 11 
149 
124 
Sept. 21 
150 
122 
Sept. 11 
138 
113 
Sept. 13 
156 
117 
Sept. 11 
130 
98 
Sept. 7 
144 
125 
Aug. 25 
145 
95 
Aug. 25 
110 
88 
Sept. 15 
156 
133 
Aug. 13 
95 
51 
Aug. 9 
112 
58 
Sept. 11 
187 
115 
Sept. 14 
181 
144 
Sept. 7 
156 
126 
Aug. 1 
63 
19 
Sept. 10 
136 
73 
Sept. 17 
166 
130 
Sept. 13 
132 
112 
Sept. 6 
99 
80 
Aug. 6 
78 
52 
Sept. 17 
167 
140 
Sept. 9 
161 
123 
Aug. 11 
85 
30 
Aug. 2 
92 
65 
Aug. 25 
142 
128 
Sept. 15 
152 
135 
Aug. 1 
62 
3 
Aug. 27 
106 
78 
Aug. 22 
88 
57 
Sept. 14 
137 
113 
Aug. 22 
88 
57 
Aug. 20 
82 
55 
Sept. 5 
78 
58 
Sept. 21 
161 
130 
Sept. 12 
163 
139 
