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Table 2. Growing Season Precipitation Probabilities
Percent probability of receiving at least the indicated amounts of
growing season precipitation at 24 selected locations in Montana
| Location |
Dates |
Average Precip-itation |
Precipitation Probabilities (percent) |
| 2 inches |
3 inches |
4 inches |
5 inches |
6 inches |
7 inches |
8 inches |
| Big Timber |
March 29
to June 27 |
6.48 inches |
96.3 |
94.7 |
85.3 |
75.4 |
60.3 |
32.7 |
22.4 |
| April 12 to July 11 |
6.42 inches |
98.7 |
94.8 |
83.4 |
71.5 |
55.1 |
36.7 |
23.7 |
| May 3 to August 1 |
6.09 inches |
>99.0 |
93.5 |
81.5 |
62.9 |
47.2 |
30.6 |
16.4 |
| Bozeman |
March 29 to June 27 |
7.06 inches |
>99.0 |
>99.0 |
95.7 |
83.1 |
70.7 |
49.6 |
34.3 |
| April 12 to July 11 |
6.93 inches |
>99.0 |
94.8 |
98.7 |
87.1 |
68.5 |
42.6 |
30.3 |
| May 3 to August 1 |
6.50 inches |
>99.0 |
93.5 |
97.1 |
81.1 |
60.5 |
41.1 |
27.9 |
| Cascade |
March 29 to June 27 |
6.83 inches |
>99.0 |
96.0 |
87.4 |
71.6 |
63.6 |
49.8 |
30.1 |
| April 12 to July 11 |
7.01 inches |
>99.0 |
98.6 |
90.9 |
73.8 |
63.0 |
49.0 |
33.8 |
| May 3 to August 1 |
6.59 inches |
>99.0 |
93.1 |
86.6 |
70.2 |
56.1 |
42.7 |
26.4 |
| Choteau |
March 29 to June 27 |
5.60 inches |
98.4 |
90.2 |
74.1 |
50.2 |
34.4 |
18.2 |
14.9 |
| April 12 to July 11 |
6.05 inches |
98.8 |
93.3 |
84.1 |
61.3 |
39.9 |
223.2 |
17.2 |
| May 3 to August 1 |
6.23 inches |
97.8 |
93.7 |
80.1 |
63.6 |
41.7 |
29.7 |
22.0 |
| Crow Agency |
March 29 to June 27 |
6.39 inches |
>99.0 |
95.0 |
74.9 |
63.2 |
58.3 |
39.5 |
25.1 |
| April 12 to July 11 |
6.29 inches |
>99.0 |
97.3 |
78.3 |
68.0 |
50.8 |
33.8 |
21.1 |
| May 3 to August 1 |
5.67 inches |
>99.0 |
92.7 |
73.1 |
57.1 |
42.4 |
28.5 |
15.5 |
| Cut Bank |
March 29 to June 27 |
5.27 inches |
95.9 |
93.4 |
80.9 |
56.6 |
27.4 |
12.4 |
9.8 |
| April 12 to July 11 |
5.76 inches |
98.3 |
93.9 |
81.6 |
63.6 |
40.9 |
21.5 |
13.0 |
| May 3 to August 1 |
5.85 inches |
98.6 |
92.4 |
77.1 |
64.7 |
47.1 |
25.5 |
12.9 |
| Ekalaka |
March 29 to June 27 |
6.77 inches |
98.1 |
94.1 |
87.0 |
77.8 |
58.2 |
46.0 |
27.2 |
| April 12 to July 11 |
7.26 inches |
>99.0 |
94.4 |
91.3 |
81.7 |
70.8 |
54.1 |
40.0 |
| May 3 to August 1 |
7.31 inches |
97.9 |
96.6 |
90.7 |
82.4 |
71.3 |
60.0 |
38.6 |
| Flatwillow |
March 29 to June 27 |
6.04 inches |
98.8 |
96.4 |
78.8 |
63.0 |
48.2 |
30.7 |
28.3 |
| April 12 to July 11 |
6.38 inches |
>99.0 |
97.9 |
85.8 |
69.1 |
53.6 |
37.8 |
25.2 |
| May 3 to August 1 |
6.49 inches |
>99.0 |
95.0 |
85.2 |
77.4 |
51.9 |
35.5 |
25.4 |
| Forks |
March 29 to June 27 |
5.33 inches |
97.9 |
88.1 |
67.9 |
50.7 |
36.4 |
20.5 |
12.8 |
| April 12 to July 11 |
6.06 inches |
>99.0 |
93.0 |
77.9 |
64.0 |
51.0 |
35.2 |
22.6 |
| May 03 - Aug 01 |
6.21 inches |
>96.7 |
91.5 |
81.0 |
65.3 |
43.4 |
36.2 |
28.8 |
| Fort Benton |
March 29 to June 27 |
6.67 inches |
>99.0 |
>99.0 |
89.5 |
76.3 |
57.9 |
39.5 |
21.1 |
| May 01 to Jul 31 |
6.68 inches |
>99.0 |
>97.4 |
86.8 |
81.6 |
57.9 |
39.5 |
23.7 |
| Glasgow |
March 29 to June 27 |
5.19 inches |
>99.0 |
83.2 |
69.6 |
48.3 |
33.5 |
20.7 |
13.4 |
| April 12 to July 11 |
5.78 inches |
>99.0 |
87.8 |
77.7 |
61.6 |
37.4 |
33.3 |
19.3 |
| May 3 to August 1 |
5.84 inches |
>99.0 |
90.7 |
77.5 |
55.7 |
46.4 |
29.5 |
21.7 |
| Glendive |
March 29 to June 27 |
6.20 inches |
98.4 |
90.3 |
84.9 |
66.8 |
60.6 |
33.7 |
25.7 |
| April 12 to July 11 |
6.78 inches |
98.8 |
93.7 |
88.2 |
75.4 |
70.1 |
52.3 |
27.2 |
| May 3 to August 1 |
6.87 inches |
97.8 |
96.9 |
90.9 |
77.7 |
63.0 |
49.1 |
30.6 |
| Great Falls |
March 29 to June 27 |
6.15 inches |
>99.0 |
98.1 |
88.5 |
63.9 |
39.3 |
29.2 |
20.3 |
| April 12 to July 11 |
6.44 inches |
>99.0 |
97.3 |
88.5 |
69.2 |
44.8 |
38.9 |
22.4 |
| May 3 to August 1 |
6.25 inches |
>99.0 |
95.1 |
80.8 |
66.0 |
49.9 |
35.4 |
22.9 |
| Hamilton |
March 29 to June 27 |
3.94 inches |
96.0 |
71.7 |
48.7 |
27.1 |
15.8 |
7.7 |
3.8 |
| April 12 to July 11 |
4.12 inches |
94.1 |
73.4 |
57.9 |
31.2 |
20.0 |
12.2 |
4.8 |
| May 3 to August 1 |
4.03 inches |
91.0 |
71.6 |
50.3 |
32.4 |
17.5 |
6.6 |
4.1 |
| Havre |
March 29 to June 27 |
4.95 inches |
98.9 |
84.8 |
63.9 |
48.0 |
30.0 |
17.6 |
8.0 |
| April 12 to July 11 |
5.33 inches |
>99.0 |
93.8 |
73.2 |
52.4 |
31.3 |
24.5 |
13.9 |
| Helena |
March 29 to June 27 |
4.66 inches |
98.3 |
83.2 |
68.0 |
40.4 |
29.0 |
12.3 |
3.9 |
| April 12 to July 11 |
4.24 inches |
>99.0 |
90.6 |
71.8 |
44.1 |
28.6 |
16.2 |
6.6 |
| May 3 to August 1 |
4.78 inches |
>98.6 |
87.3 |
71.1 |
40.3 |
23.5 |
11.9 |
5.8 |
| Huntley |
March 29 to June 27 |
5.70 inches |
96.6 |
94.4 |
70.0 |
58.4 |
43.7 |
27.7 |
17.2 |
| April 12 to July 11 |
5.77 inches |
96.2 |
94.0 |
80.7 |
60.4 |
46.5 |
29.9 |
22.3 |
| May 3 to August 1 |
5.38 inches |
97.1 |
85.2 |
76.2 |
57.1 |
45.9 |
22.8 |
16.2 |
| Jordan |
March 29 to June 27 |
5.10 inches |
92.7 |
79.4 |
62.6 |
50.1 |
37.4 |
21.6 |
14.2 |
| April 12 to July 11 |
5.68 inches |
95.5 |
82.2 |
68.2 |
56.0 |
43.7 |
31.6 |
20.7 |
| May 3 to August 1 |
5.56 inches |
97.2 |
88.7 |
68.3 |
55.7 |
46.9 |
22.0 |
18.3 |
| Kalispell |
March 29 to June 27 |
4.80 inches |
100 |
95.7 |
73.5 |
46.0 |
16.7 |
7.3 |
6.3 |
| April 12 to July 11 |
5.12 inches |
100 |
97.7 |
75.9 |
51.7 |
24.5 |
9.4 |
6.7 |
| May 3 to August 1 |
4.45 inches |
100 |
95.3 |
71.4 |
40.4 |
18.7 |
7.4 |
6.7 |
| Malta |
March 29 to June 27 |
5.42 inches |
98.2 |
83.1 |
71.8 |
54.0 |
35.0 |
25.3 |
16.3 |
| April 12 to July 11 |
5.97 inches |
98.4 |
90.7 |
78.1 |
62.2 |
43.6 |
28.7 |
21.4 |
| May 3 to August 1 |
6.19 inches |
97.0 |
90.5 |
82.3 |
63.0 |
49.4 |
32.7 |
19.9 |
| Medicine Lake |
March 29 to June 27 |
5.74 inches |
96.5 |
86.5 |
69.0 |
56.9 |
46.9 |
26.5 |
21.8 |
| April 12 to July 11 |
6.62 inches |
>99.0 |
92.5 |
77.5 |
69.7 |
60.9 |
39.0 |
24.3 |
| May 3 to August 1 |
7.02 inches |
>99.0 |
97.8 |
84.8 |
79.2 |
62.4 |
38.5 |
34.3 |
| Mildred |
March 29 to June 27 |
5.84 inches |
95.9 |
90.8 |
76.7 |
64.6 |
46.9 |
32.2 |
18.1 |
| April 12 to July 11 |
6.29 inches |
98.4 |
94.7 |
80.5 |
70.6 |
59.1 |
37.7 |
24.2 |
| May 3 to August 1 |
6.23 inches |
98.6 |
93.7 |
82.7 |
69.4 |
56.8 |
35.3 |
19.2 |
| Miles City |
March 29 to June 27 |
5.74 inches |
97.2 |
92.9 |
71.3 |
60.9 |
45.3 |
29.3 |
17.5 |
| April 12 to July 11 |
6.06 inches |
98.4 |
93.4 |
78.7 |
64.3 |
49.1 |
30.7 |
22.3 |
| May 3 to August 1 |
6.01 inches |
>99.0 |
89.7 |
79.3 |
64.8 |
48.0 |
32.3 |
19.3 |
| Moccasin |
March 29 to June 27 |
6.68 inches |
>99.0 |
97.2 |
92.4 |
78.8 |
58.4 |
44.5 |
31.7 |
| April 12 to July 11 |
7.11 inches |
>99.0 |
96.7 |
92.9 |
81.7 |
67.0 |
53.8 |
41.1 |
| May 3 to August 1 |
7.28 inches |
>99.0 |
98.8 |
94.5 |
84.4 |
68.4 |
58.9 |
38.1 |
| Plevna |
March 29 to June 27 |
5.99 inches |
98.8 |
91.8 |
77.0 |
65.3 |
52.4 |
39.6 |
21.6 |
| April 12 to July 11 |
6.42 inches |
>99.0 |
89.7 |
81.5 |
69.9 |
59.7 |
47.7 |
27.6 |
| May 3 to August 1 |
6.52 inches |
>99.0 |
95.4 |
85.3 |
70.9 |
62.2 |
49.7 |
23.8 |
| Poplar |
March 29 to June 27 |
5.52 inches |
97.1 |
87.8 |
72.8 |
62.4 |
40.1 |
24.6 |
14.0 |
| April 12 to July 11 |
6.49 inches |
98.6 |
91.3 |
79.7 |
70.1 |
60.8 |
42.4 |
29.2 |
| May 3 to August 1 |
6.83 inches |
>99.0 |
95.2 |
84.9 |
69.1 |
55.2 |
44.4 |
39.3 |
| Saint Ignatius |
March 29 to June 27 |
5.73 inches |
100 |
96.2 |
89.7 |
72.6 |
41.8 |
32.6 |
14.3 |
| April 12 to July 11 |
5.95 inches |
100 |
100 |
89.2 |
72.9 |
45.9 |
27.3 |
22.9 |
| May 3 to August 1 |
5.11 inches |
100 |
100 |
89.4 |
55.2 |
30.3 |
21.5 |
15.6 |
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Soil Moisture for Flex-Crop Systems
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