Cold Wave Risk in Montana

All Montana counties ranked by FEMA National Risk Index cold wave score

Cold Wave risk — prolonged spells of dangerously low temperatures — is rated for 56 of 56 Montana counties in FEMA's National Risk Index. Cascade County carries the state's highest cold wave score at 98.0, with $23M in expected annual cold wave losses.

13 Montana counties are rated High or Very High for cold wave, and expected annual losses from cold wave total roughly $244M statewide. The full ranking below links to each county's complete 18-hazard risk profile.

County Rankings — Cold Wave

#CountyCold Wave ScoreRatingAnn. Freq.Ann. Loss
1 Cascade County
98.0
High 8.10 / yr $23M
2 Dawson County
97.5
High 13.79 / yr $16M
3 Yellowstone County
97.1
High 3.55 / yr $19M
4 Richland County
95.5
High 15.21 / yr $17M
5 Flathead County
95.1
High 4.19 / yr $14M
6 Roosevelt County
95.0
High 18.76 / yr $6M
7 Lewis and Clark County
94.6
High 6.33 / yr $13M
8 Hill County
93.7
High 11.55 / yr $8M
9 Gallatin County
93.6
High 3.57 / yr $14M
10 Missoula County
93.1
High 3.44 / yr $14M
11 Fergus County
91.8
High 8.81 / yr $8M
12 Glacier County
91.7
High 8.99 / yr $5M
13 Blaine County
90.0
High 11.37 / yr $4M
14 Ravalli County
87.6
Medium 2.18 / yr $6M
15 Custer County
87.0
Medium 6.32 / yr $4M
16 Phillips County
85.9
Medium 14.32 / yr $4M
17 Lake County
85.8
Medium 4.49 / yr $5M
18 Valley County
85.7
Medium 19.30 / yr $5M
19 Wibaux County
82.3
Medium 13.26 / yr $6M
20 Silver Bow County
81.9
Medium 4.31 / yr $5M
21 Chouteau County
81.3
Medium 9.12 / yr $3M
22 Pondera County
81.3
Medium 8.97 / yr $3M
23 Sheridan County
79.5
Medium 20.95 / yr $3M
24 Rosebud County
78.5
Medium 5.05 / yr $2M
25 Big Horn County
76.9
Medium 3.15 / yr $2M
26 Toole County
76.6
Medium 10.51 / yr $2M
27 Lincoln County
72.8
Medium 2.50 / yr $2M
28 Beaverhead County
70.0
Medium 3.48 / yr $2M
29 Park County
69.8
Medium 1.26 / yr $2M
30 Teton County
68.7
Medium 8.06 / yr $2M
31 Fallon County
67.9
Medium 8.16 / yr $3M
32 Sanders County
66.5
Medium 2.50 / yr $1M
33 Musselshell County
65.5
Medium 3.95 / yr $1M
34 Liberty County
64.7
Low 10.32 / yr $1M
35 Prairie County
64.2
Low 11.95 / yr $1M
36 Carbon County
62.8
Low 2.35 / yr $1M
37 McCone County
62.8
Low 13.68 / yr $2M
38 Jefferson County
62.7
Low 4.21 / yr $2M
39 Deer Lodge County
62.0
Low 4.31 / yr $1M
40 Powell County
57.4
Low 4.40 / yr $1M
41 Judith Basin County
56.0
Low 8.30 / yr $1M
42 Broadwater County
54.3
Low 4.00 / yr $990K
43 Daniels County
54.2
Low 21.06 / yr $1M
44 Madison County
53.9
Low 3.61 / yr $1M
45 Garfield County
44.1
Low 11.47 / yr $886K
46 Stillwater County
43.4
Low 2.72 / yr $1M
47 Carter County
39.3
Low 7.42 / yr $852K
48 Wheatland County
37.5
Low 4.11 / yr $485K
49 Meagher County
37.0
Low 5.42 / yr $521K
50 Granite County
34.4
Low 2.94 / yr $470K
51 Petroleum County
32.4
Low 7.69 / yr $505K
52 Powder River County
32.3
Low 5.16 / yr $559K
53 Sweet Grass County
29.8
Low 2.41 / yr $578K
54 Mineral County
26.8
Low 2.05 / yr $299K
55 Golden Valley County
20.4
Very Low 4.02 / yr $220K
56 Treasure County
18.1
Very Low 3.85 / yr $254K

56 Montana counties with measurable cold wave risk. See the national cold wave ranking or all Montana counties by overall risk.

Frequently Asked Questions

Which Montana county has the highest cold wave risk?

Cascade County has the highest FEMA cold wave risk score in Montana at 98.0 (High), with $23M in expected annual losses and about 8.10 events per year.

How many Montana counties face significant cold wave risk?

56 Montana counties record measurable cold wave risk in FEMA's National Risk Index; 13 of them are rated High or Very High.

Other Hazards in Montana