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Rocky Boy's Agency, MT

Full City Profile · Montana · Hill County County

3.4 /5.0
B Good
124 Population 14/sq mi density
$59,175 Median Income $48,270 per capita
$44,600 Home Value $224,252 Zillow
44°F Avg Temperature 274 sunny days/yr
538 Violent Crime/100K 3,605 property/100K
B
Overall
3.4 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.2 / 5.0
$59,175 median income, 0.0% unemployment
A+
Affordability
5.0 / 5.0
$44,600 home value, /mo rent
F
Safety
1.0 / 5.0
538 violent crimes/100K (42% above avg)
B+
Education
3.6 / 5.0
32.4% bachelor's degree or higher
Rocky Boy's Agency has a cool climate with an average annual temperature of 44°F (7°C). Winters average 18°F in January while summers reach 70°F in July. The area gets 274 sunny days per year. Annual precipitation totals 13.1 inches. The area receives 34.6 inches of snow annually. Air quality is rated Good with a median AQI of 26.

Temperature

18°F Jan (-8°C) 70°F Jul (21°C)
Annual Average43.5°F
19% below US avg
January Average18°F (-8°C)
July Average70°F (21°C)
Sunny Days274 days/yr

Geography

Elevation3,829 ft (1,167 m)
Area8.6 sq mi (22.2 km²)
Population Density14/sq mi
Coordinates48.2610°N, 109.7746°W
TimezoneAmerica/Denver
CountyHill County County
Nearest AirportGreat Falls International (GTF)
91 miles away

Precipitation & Snow

Annual Rainfall 13.1"
65% below US avg
Snowfall 34.6"
Wettest Month (May) 3.07"
Driest Month (Feb) 0.59"

Air Quality

AQI Median26.0
RatingGood

Air Pollutants (EPA 2023)

PM2.5 (Fine Particles)7.9 μg/m³

Natural Hazard Risk

Overall RiskRelatively Low
Risk Score50.5 / 100
Social Vulnerability67.1 / 100
Community Resilience38.1 / 100

Hazard Breakdown

Tornado Very Low
Earthquake Very Low
Wildfire Very Low
Flood Relatively Low
Hail Very Low
Strong Wind Very Low
Heat Wave Very Low
Winter Weather Relatively High
Lightning Relatively Moderate
Ice Storm Very Low
Drought Relatively Low
Cold Wave Relatively High
Landslide Very Low
Avalanche Very Low
Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

6 earthquakes (M2.5+) within 150 km since 1990. Strongest: M3.9. Most recent: M2.7 on Jul 10, 2021.

Aug 16, 1994 27 km W of Chester, Montana M3.9 118 km
Dec 5, 1991 15 km WSW of Hays, Montana M3.0 74 km
Oct 16, 2011 Eastern Montana M2.7 140 km
Jul 10, 2021 24 km SSE of Malta, Montana M2.7 148 km
Feb 25, 2013 28 km WSW of Chester, Montana M2.5 114 km
Jul 15, 2015 48 km E of Zortman, Montana M2.5 148 km
Source: USGS (M2.5+, 1990–2025)

Tornado History

29 tornadoes (EF0+) within 100 km since 1950. Strongest: EF3. Total: 7 injuries.

Date Rating Distance Fatalities
Jul 5, 1988 EF3 36 km 0
Jul 5, 1988 EF3 60 km 0
Jul 5, 1988 EF3 45 km 0
Jun 25, 1996 EF2 96 km 0
Jul 8, 2002 EF1 54 km 0
Jun 19, 1998 EF1 94 km 0
Jun 16, 1995 EF1 88 km 0
May 25, 1980 EF1 56 km 0
May 25, 1980 EF1 96 km 0
May 24, 1977 EF1 81 km 0
Jul 10, 1965 EF1 92 km 0
Jul 1, 1962 EF1 27 km 0
Aug 26, 2022 EF0 61 km 0
Jun 13, 2014 EF0 44 km 0
Jun 5, 2012 EF0 25 km 0
Jun 17, 2005 EF0 67 km 0
Aug 5, 2002 EF0 85 km 0
Jul 20, 1999 EF0 98 km 0
Jul 7, 1999 EF0 88 km 0
Jun 18, 1999 EF0 54 km 0
Source: NOAA SPC (EF0+, 1950–2024)

Wildfire History

20 wildfires (100+ acres) within 100 km. Largest: BLAINE C (138,192 ac, 1991).

Year Name Acres Distance
1991 BLAINE C 138,192 45 km
2012 WELDER 32,985 89 km
2021 TAYLOR 21,704 86 km
2017 EAST FORK 21,165 15 km
2021 PINE GROVE 16,158 92 km
2009 MEISSNER 12,318 98 km
1984 CENTENNIAL 11,775 3 km
2017 JULY 11,409 98 km
2006 MAGGIE 8,187 67 km
2022 EAGLE CREEK 6,359 17 km
1988 MONUMENT 5,514 95 km
1988 LOSTCANYON 4,532 7 km
2008 CHOUTEAU CO COMPLEX 4,365 60 km
2003 LAKE17 4,054 72 km
2006 HOWARD 3,884 87 km
2014 MIDDLE BLACK 3,854 81 km
2012 OUTHOUSE 3,179 40 km
1990 ADAMS 3,072 88 km
1990 QUISNO 3,018 82 km
2007 CHOUTEAU CO ASST 2,646 77 km
Source: NIFC/IRWIN (100+ acres)

Monthly Weather

Month Avg Temperature Precipitation Summary
January 18°F (-8°C) 0.8 in Coldest
February 22°F (-6°C) 0.6 in Driest
March 29°F (-2°C) 0.9 in
April 40°F (4°C) 1.3 in
May 49°F (10°C) 3.1 in Wettest
June 58°F (14°C) 2.9 in
July 70°F (21°C) 1.8 in Warmest
August 64°F (18°C) 1.9 in
September 54°F (12°C) 1.8 in
October 43°F (6°C) 0.9 in
November 29°F (-2°C) 0.6 in
December 20°F (-6°C) 0.8 in

Rocky Boy's Agency has a seasonal temperature swing of 52°F / from 18°F in January to 70°F in July. Total annual precipitation is 17.3 inches, with May being the wettest month (3.1") and February the driest (0.6").

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