CLIMATOLOGICAL DATA
Annual and Growing Season Precipitation and Frost Free Days, Montana, USA
Last updated: October 30, 2008  
 

STATIONS

COUNTY

PRECIPITATION in Inches

FROST FREE DAYS 1/

Annual

April – September

Growing Season

2005

2006

Normal 2/

2005

2006

Normal 2/

2005

2006

Average 3/

Bigfork 13 S
Big Sandy
Big Timber
Billings AP R
Bozeman MSU
Broadus
Butte AP R
Chester
Chinook
Circle
Lake
Chouteau
Sweet Grass
Yellowstone
Gallatin
Powder River
Silver Bow
Liberty
Blaine
McCone
25.53
13.25
17.70
15.27
22.67
18.69
13.22
--
12.90
16.84
22.80
11.96
16.40
12.97
20.53
10.73
12.44
--
10.47
12.10
21.87
13.82
16.11
14.77
19.29
13.59
12.78
10.58
13.06
13.28
16.41
9.43
13.70
10.34
13.28
13.94
9.63
7.59
8.67
13.37
13.69
9.15
9.86
6.68
11.39
8.44
8.53
--
6.84
10.18
12.47
10.54
11.25
9.58
12.85
9.49
9.03
8.20
10.00
10.06
192
119
145
144
109
--
76
123
132
115
161
148
151
158
136
--
93
--
156
127
152
97
126
150
120
119
73
108
119
120
Columbus
Conrad
Culbertson
Cut Bank AP R
Dillon WMCE
Ekalaka
Fairfield
Flatwillow 4 ENE
Forsyth
Fort Benton
Stillwater
Pondera
Roosevelt
Glacier
Beaverhead
Carter
Teton
Petroleum
Rosebud
Chouteau
17.75
--
15.79
--
12.90
20.23
13.69
13.82
18.22
12.50
14.09
12.92
13.55
3.96
9.32
14.67
15.07
13.85
12.41
14.60
15.67
12.06
13.58
12.51
11.65
17.25
12.50
13.30
14.08
13.69
12.31
--
12.79
12.37
7.63
15.38
9.83
8.16
12.00
7.92
8.42
9.36
11.13
3.24
6.25
11.71
12.32
9.10
7.78
10.60
10.56
9.12
10.90
10.07
8.78
12.39
9.85
9.84
9.97
10.04
114
117
130
102
105
128
139
116
143
135
110
113
127
111
110
131
158
149
145
156
125
93
117
113
103
123
133
118
134
131
Geraldine
Glasgow AP R
Glendive
Great Falls AP R
Hardin
Harlowton
Havre AP R
Helena AP R
Hysham 25 SSE
Chouteau
Valley
Dawson
Cascade
Big Horn
Wheatland
Hill
Lewis & Clark
Treasure
17.30
10.13
15.03
15.65
13.81
--
11.20
12.16
--
15.81
10.61
11.42
18.53
--
--
8.62
12.53
--
16.04
11.23
13.62
14.89
12.07
14.08
11.46
11.32
14.37
11.51
7.77
10.44
11.87
8.93
12.42
8.44
8.64
--
10.93
7.17
8.92
13.18
--
9.24
6.31
9.22
7.13
11.58
8.68
10.42
10.50
8.08
10.73
8.35
8.19
9.63
121
137
144
107
145
120
116
145
--
150
131
140
129
153
--
--
157
95
125
133
144
120
133
111
125
121
135
Joliet
Jordan
Kalispell AP R
Kremlin
Lewistown FCWOS
Livingston AP R
Malta 7 E
Medicine Lake 3 SE
Miles City AP R
Missoula AP R
Carbon
Garfield
Flathead
Hill
Fergus
Park
Phillips
Sheridan
Custer
Missoula
15.12
16.51
17.38
11.00
18.12
17.95
14.77
--
14.97
15.61
13.24
10.59
17.28
10.11 17.04
13.69
9.58
--
10.68
16.64
15.77
12.90
17.21
12.24
17.85
15.73
12.88
12.99
13.49
13.82
10.76
13.10
11.33
7.81
13.00
12.64
11.85
10.18
11.51
9.57
6.87
8.69
9.58
7.96
11.66
8.13
6.17
--
7.95
9.54
10.24
9.59
9.42
9.49
12.60
11.26
9.93
10.43
9.97
8.09
144
136
119
--
122
120
133
130
143
160
114
136
111
--
128
110
157
--
137
131
120
122
91
--
116
105
122
125
143
117
Opheim 12 SSE
Plentywood
Plevna
Roundup
Savage
Scobey 4 NW
Sidney
St Ignatius
Stanford
Sunburst  8E
Valley
Sheridan
Fallon
Musselshell
Richland
Daniels
Richland
Lake
Judith Basin
Toole
14.08
10.36
19.10
17.98
19.66
11.38
15.04
--
14.83
18.73
8.35
--
12.86
13.92
12.12
9.55
--
--
17.26
13.64
11.94
13.15
14.69
13.25
13.96
12.48
14.31
16.54
17.13
13.05
12.41
8.98
14.34
13.96
14.70
10.01
10.16
12.25
10.17
14.52
6.14
9.58
9.99
9.20
10.28
7.81
--
12.40
12.82
9.53
9.89
10.39
10.67
9.99
10.89
10.22
10.84
10.34
12.69
10.06
132
--
115
132
131
114
131
123
121
135
110
--
128
129
131
110
--
149
126
131
110
116
114
131
126
108
125
131
109
115
Terry 21 NNW
Thompson Falls PH
Townsend
Valier
Vida 6 NE
Virginia City
Wibaux 2 E
Wilsall 8 ENE
Wisdom
Wyola SW
Prairie
Sanders
Broadwater
Pondera
McCone
Madison
Wibaux
Park
Beaverhead
Big Horn
17.63
18.17
14.97
12.73
--
17.45
19.81
23.12
14.24
--
11.49
25.19
11.16
12.64
13.84
16.22
13.65
16.07
10.17
--
13.67
23.07
10.67
12.22
13.88
15.82
14.01
20.96
11.90
16.89
13.26
7.77
11.59
10.14
--
11.79
16.08
15.73
8.47
15.84
8.80
7.67
8.46
9.58
11.68
9.25
11.31
9.91
5.60
--
10.44
9.59
8.20
9.91
10.46
10.85
11.17
14.40
7.85
11.03
107
146
108
135
136
83
130
62
14
124
125
149
114
130
128
92
125
92
37
--
126
133
120
117
119
85
113
95
18
115
1/ The number of days between the last frost (32 degrees) in spring and first frost (32 degrees) after June 30.
2/ Normal for period 1971-2000.
3/ Average frost-free days for the period 1991-2000.
-- Not available
SOURCE: National Climatic Data Center, NOAA, Asheville, North Carolina.
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