Montana Climate Summary - By County
| All of the information is APPROXIMATE. Expect the actual growing season to vary by plus or minus 2 weeks from year to year. Actual site conditions also play an important role in growing season characteristics. | |||||
|---|---|---|---|---|---|
| County |
Station |
Last in Spring |
First in Fall |
Growing Season (days) |
Annual Precipitation (inches) |
Bowen |
* |
* |
----- |
12.14 |
|
|
Dillon |
May 22 |
Sept. 12 |
113 |
16.67 |
|
Grant |
June 13 |
Sept. 9 |
88 |
10.79 |
|
Lima |
June 11 |
Sept. 6 |
87 |
9.27 |
Busby |
May 24 |
Sept. 16 |
115 |
12.98 |
|
|
Crow Agency |
May 13 |
Sept. 25 |
135 |
15.33 |
|
Foster (near) |
May 18 |
Sept. 18 |
123 |
11.59 |
|
Wyola |
May 22 |
Sept. 25 |
126 |
13.43 |
Chinook |
May 13 |
Sept. 19 |
129 |
13.22 |
|
|
Clear Creek |
May 26 |
Sept. 23 |
120 |
16.41 |
|
Harlem |
May 16 |
Sept. 21 |
128 |
12.78 |
Townsend (near) |
----- |
----- |
101 |
10.10 |
|
Bridger |
May 18 |
Sept. 18 |
123 |
10.42 |
|
|
Red Lodge (near) |
June 4 |
Sept. 12 |
100 |
18.38 |
Ekalaka |
May 19 |
Sept. 23 |
127 |
13.17 |
|
Adel (near) |
June 8 |
Sept. 5 |
89 |
24.20 |
|
|
Cascade (near) |
May 20 |
Sept. 17 |
120 |
15.83 |
|
Great Falls |
May 9 |
Sept. 25 |
139 |
15.21 |
Big Sandy |
May 15 |
Sept. 20 |
128 |
12.11 |
|
|
Carter |
May 20 |
Sept. 15 |
118 |
12.10 |
|
Fort Benton |
May 11 |
Sept. 25 |
137 |
13.11 |
|
Geraldine (near) |
May 8 |
Sept. 28 |
143 |
15.30 |
|
Highwood |
May 23 |
Sept. 18 |
118 |
18.90 |
|
Kenilworth (near) |
May 25 |
Sept. 18 |
116 |
12.00 |
|
Lytle |
May 12 |
Sept. 25 |
136 |
13.13 |
Garland |
May 18 |
Sept. 23 |
128 |
11.81 |
|
|
Knowlton (near) |
May 15 |
Sept. 22 |
130 |
15.76 |
|
Miles City |
April 30 |
Oct. 5 |
158 |
13.16 |
Scobey |
May 24 |
Sept. 22 |
121 |
11.45 |
|
Glendive |
May 13 |
Sept. 24 |
134 |
14.03 |
|
|
Paxton (near) |
May 7 |
Sept. 28 |
144 |
11.09 |
Anaconda |
June 8 |
Sept. 14 |
98 |
14.24 |
|
|
East Anaconda |
May 27 |
Sept. 21 |
117 |
13.27 |
Baker |
May 9 |
Sept. 25 |
139 |
14.21 |
|
|
Plevna (near) |
May 18 |
Sept. 27 |
132 |
13.46 |
Denton |
May 15 |
Sept. 24 |
132 |
14.13 |
|
|
Lewistown |
May 28 |
Sept. 13 |
108 |
17.87 |
|
Pinegrove |
June 3 |
Sept. 13 |
102 |
19.78 |
|
Valentine |
May 17 |
Sept. 19 |
125 |
10.90 |
|
Winifred |
May 15 |
Sept. 23 |
131 |
11.64 |
Belton |
May 28 |
Sept. 17 |
112 |
26.25 |
|
|
Columbia Falls |
June 1 |
Sept. 8 |
99 |
20.65 |
|
Kalispell |
May 5 |
Oct. 1 |
149 |
14.50 |
|
Pleasant Valley (near) |
* |
* |
----- |
18.05 |
MSU-Bozeman |
May 24 |
Sept. 16 |
115 |
17.39 |
|
|
Flathead Creek |
June 4 |
Sept. 1 |
89 |
21.82 |
|
Hebgen Dam |
June 15 |
Sept. 11 |
88 |
22.84 |
|
Three Forks |
May 30 |
Sept. 19 |
112 |
11.86 |
Jordan |
May 19 |
Sept. 21 |
125 |
11.62 |
|
|
Sentinel Butte Pass |
May 7 |
Oct. 2 |
148 |
14.53 |
|
Snowbelt |
May 17 |
Sept. 28 |
134 |
13.87 |
Babb (near) |
May 29 |
Sept. 8 |
102 |
19.43 |
|
|
Browning |
June 6 |
Sept. 7 |
93 |
13.92 |
|
Cut Bank |
May 23 |
Sept. 17 |
117 |
11.24 |
Emory |
May 22 |
Sept. 14 |
115 |
14.90 |
|
|
Ryegate |
----- |
----- |
----- |
14.82 |
Drummond (near) |
----- |
----- |
----- |
10.55 |
|
|
Phillipsburg |
June 9 |
Sept. 4 |
87 |
14.75 |
Havre |
May 11 |
Sept. 22 |
134 |
13.07 |
|
Boulder |
June 11 |
Sept. 6 |
87 |
12.60 |
|
|
Dry Land |
----- |
----- |
----- |
----- |
|
Experiment Station |
May 25 |
Sept. 20 |
118 |
12.67 |
|
Pipestone Dam |
June 15 |
Sept. 6 |
83 |
11.97 |
|
Renova (near) |
May 26 |
Sept. 11 |
108 |
11.34 |
Hobson |
----- |
----- |
----- |
15.45 |
|
|
Stanford |
May 23 |
Sept. 28 |
128 |
14.57 |
|
Utica |
May 25 |
Sept. 18 |
116 |
16.45 |
Dayton |
May 18 |
Sept. 25 |
130 |
14.09 |
|
|
Polson |
May 12 |
Sept. 27 |
138 |
14.56 |
|
St. Ignatius |
May 21 |
Sept. 23 |
125 |
15.13 |
Augusta |
May 29 |
Sept. 10 |
104 |
14.35 |
|
|
Big Ox |
June 3 |
Sept. 8 |
97 |
19.08 |
|
Canyon Ferry |
May 13 |
Sept. 22 |
132 |
10.99 |
|
Chessman Res |
----- |
----- |
----- |
21.31 |
|
East Helena |
May 14 |
Sept. 22 |
131 |
9.39 |
|
Helena |
May 2 |
Oct. 2 |
153 |
12.54 |
|
Helena Valley |
----- |
----- |
101 |
8.47 |
|
Holter |
May 13 |
Sept. 23 |
133 |
13.24 |
|
Sun River Canyon |
May 27 |
Sept. 21 |
117 |
15.52 |
Chester |
May 25 |
Sept. 7 |
105 |
10.53 |
|
|
Kinread |
May 25 |
Sept. 15 |
113 |
10.82 |
|
Lothair |
May 15 |
Sept. 19 |
127 |
11.06 |
Fortine |
May 29 |
Sept. 8 |
102 |
17.43 |
|
|
Libby |
June 1 |
Sept. 9 |
100 |
18.81 |
|
Upper Yaak River |
* |
* |
----- |
19.78 |
Conway's Ranch |
* |
* |
----- |
16.38 |
|
|
Ennis |
June 2 |
Sept. 11 |
101 |
10.69 |
|
Norris (near) |
May 15 |
Sept. 29 |
137 |
17.05 |
|
Virginia City |
May 30 |
Sept. 18 |
111 |
12.98 |
Circle (near) |
May 23 |
Sept. 16 |
116 |
16.09 |
|
|
Vida (near) |
May 13 |
Sept. 25 |
135 |
15.05 |
Copper |
June 6 |
Aug. 29 |
84 |
15.95 |
|
|
Findon |
May 22 |
Sept. 22 |
123 |
17.55 |
|
Fort Logan |
----- |
----- |
----- |
11.70 |
|
Loweth |
June 8 |
Sept. 9 |
93 |
12.15 |
|
White Sulphur Springs |
May 29 |
Sept. 14 |
108 |
14.19 |
Haugan |
June 11 |
Aug. 30 |
80 |
27.63 |
|
|
Saltese |
----- |
----- |
----- |
34.24 |
|
Superior |
June 2 |
Sept. 11 |
101 |
15.54 |
Missoula |
May 18 |
Sept. 23 |
128 |
14.01 |
|
Melstone |
May 10 |
Sept. 25 |
138 |
11.73 |
|
|
Roundup |
May 9 |
Sept. 27 |
141 |
12.26 |
Livingston |
May 17 |
Sept. 21 |
127 |
14.67 |
|
Flatwillow (near) |
May 18 |
Sept. 25 |
130 |
11.88 |
|
Malta |
May 14 |
Sept. 24 |
133 |
13.47 |
|
|
Fork (near) |
May 24 |
Sept. 13 |
112 |
12.97 |
|
Zortman |
----- |
----- |
----- |
17.51 |
Conrad |
May 21 |
Sept. 19 |
121 |
11.63 |
|
|
Valier |
May 17 |
Sept. 23 |
129 |
12.26 |
Biddle |
May 23 |
Sept. 21 |
121 |
15.11 |
|
Deer Lodge |
June 5 |
Sept. 9 |
96 |
10.27 |
|
|
Elliston |
----- |
----- |
----- |
21.23 |
|
Ovando |
June 8 |
Aug. 25 |
78 |
17.40 |
Fallon |
May 19 |
Sept. 18 |
122 |
13.36 |
|
|
Mildred |
May 14 |
Sept. 25 |
134 |
12.03 |
Como |
May 22 |
Sept. 26 |
127 |
15.08 |
|
|
Darby (near) |
May 20 |
Sept. 16 |
119 |
16.25 |
|
Hamilton |
May 16 |
Sept. 23 |
130 |
11.31 |
|
Stevensville |
May 25 |
Sept. 15 |
113 |
12.22 |
|
Sula |
----- |
----- |
----- |
16.57 |
|
Sunset Orchards |
May 20 |
Sept. 21 |
124 |
12.86 |
|
Victor (near) |
May 23 |
Sept. 22 |
122 |
13.06 |
Culbertson (near) |
May 19 |
Sept. 18 |
122 |
12.28 |
|
|
Savage |
May 18 |
Sept. 22 |
127 |
13.08 |
|
Sidney |
May 18 |
Sept. 21 |
126 |
14.93 |
Poplar |
May 16 |
Sept. 18 |
125 |
12.67 |
|
Ashland (near) |
May 9 |
Sept. 28 |
142 |
14.51 |
|
|
Colstrip |
May 15 |
Sept. 24 |
132 |
13.81 |
|
Forsyth |
May 16 |
Sept. 27 |
134 |
12.86 |
|
Ingomar (near) |
May 20 |
Sept. 26 |
129 |
10.24 |
|
Rock Springs (near) |
May 17 |
Sept. 24 |
130 |
13.08 |
Heron |
May 30 |
Sept. 6 |
99 |
32.45 |
|
|
Lonepine |
May 22 |
Sept. 19 |
120 |
10.10 |
|
Plains |
May 30 |
Sept. 20 |
113 |
14.08 |
|
Thompson Falls |
May 18 |
Sept. 21 |
126 |
19.98 |
|
Trout Creek (near) |
June 4 |
Sept. 4 |
92 |
28.83 |
Medicine Lake (near) |
May 26 |
Sept. 17 |
114 |
12.71 |
|
|
Outlook |
May 23 |
Sept. 21 |
121 |
12.45 |
Butte |
May 29 |
Sept. 16 |
110 |
13.51 |
|
Busteed |
May 22 |
Sept. 21 |
122 |
14.51 |
|
|
Mystic Lake |
May 26 |
Sept. 20 |
117 |
22.68 |
|
Nye |
----- |
----- |
----- |
21.55 |
Big Timber |
May 20 |
Sept. 20 |
123 |
14.61 |
|
Blackleaf |
June 4 |
Aug. 30 |
87 |
16.92 |
|
|
Choteau |
May 26 |
Sept. 15 |
112 |
11.79 |
|
Fairfield |
May 19 |
Sept. 20 |
124 |
11.53 |
Dunkirk (near) |
May 22 |
Sept. 19 |
120 |
12.36 |
|
|
Goldbutte |
May 24 |
Sept. 19 |
118 |
13.00 |
|
Knoble's Ranch |
May 23 |
Sept. 25 |
125 |
14.51 |
|
Shelby |
May 27 |
Sept. 14 |
110 |
11.50 |
Sarpy Creek |
May 22 |
Sept. 24 |
125 |
10.88 |
|
Frazer |
May 16 |
Sept. 20 |
127 |
12.07 |
|
|
Glasgow |
May 19 |
Sept. 19 |
123 |
13.21 |
|
Lustre (near) |
----- |
----- |
----- |
11.43 |
|
Opheim |
May 24 |
Sept. 19 |
118 |
9.56 |
Harlowtown (near) |
June 2 |
Sept. 6 |
96 |
11.74 |
|
Wibaux |
May 25 |
Sept. 13 |
111 |
15.71 |
|
|
May 15 |
Sept. 20 |
125 |
13.00 |
|
