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Weather & Climate in Roberts, MT

Temperature, precipitation, air quality, natural hazards, and monthly weather data.

Roberts has a cool climate with an average annual temperature of 43°F (6°C). Winters average 26°F in January while summers reach 66°F in July. The area gets 276 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 22.7 inches (drier than the 38-inch national average). The area receives 141.9 inches of snow annually, making winter weather a significant factor for residents. Air quality is rated Good with a median AQI of 26 / among the cleanest air in the country. The city sits at an elevation of 4,665 feet.

Temperature

26°F Jan (-4°C) 66°F Jul (19°C)
Annual Average43.4°F
20% below US avg
January Average26°F (-4°C)
July Average66°F (19°C)
Sunny Days276 days/yr

Geography

Elevation4,665 ft (1,422 m)
Area4.0 sq mi (10.3 km²)
Population Density75/sq mi
Coordinates45.3436°N, 109.1818°W
TimezoneAmerica/Denver
CountyCarbon County County
Nearest AirportBillings Logan International (BIL)
45 miles away

Precipitation & Snow

Annual Rainfall 22.7"
40% below US avg
Snowfall 141.9"
Wettest Month (May) 2.95"
Driest Month (Feb) 0.67"

Air Quality

AQI Median26.0
RatingGood

Natural Hazard Risk

Overall RiskRelatively Low
Risk Score59.8 / 100
Social Vulnerability74.8 / 100
Community Resilience64.1 / 100

Hazard Breakdown

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

Earthquake History

289 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.8.

Mar 30, 2014 22 km S of Mammoth, Wyoming M4.8 134 km 6 km
May 11, 2022 36 km S of Silver Gate, Montana M4.2 98 km 14 km
Nov 24, 2000 24 km S of Mammoth, Wyoming M4.2 136 km 9 km
Mar 25, 2008 35 km S of Silver Gate, Montana M4.2 98 km 4 km
Sep 18, 2022 22 km SSW of Mammoth, Wyoming M3.9 142 km 11 km
Jan 30, 2023 9 km NNW of Livingston, Montana M3.8 119 km 20 km
Jan 29, 2025 24 km SSW of Mammoth, Wyoming M3.7 140 km 8 km
Mar 29, 2023 56 km SSE of Mammoth, Wyoming M3.7 130 km 4 km
Aug 19, 2025 22 km SSW of Mammoth, Wyoming M3.7 145 km 12 km
Jan 9, 2003 23 km E of Wilsall, Montana M3.7 119 km 11 km
Sep 24, 1994 39 km SSE of Mammoth, Wyoming M3.7 127 km 5 km
Mar 30, 2014 21 km S of Mammoth, Wyoming M3.7 136 km 3 km
Jul 17, 2021 63 km SSE of Mammoth, Wyoming M3.6 134 km 6 km
Jun 16, 1997 25 km ENE of West Yellowstone, Montana M3.6 144 km 9 km
Jul 20, 1992 52 km SSE of Mammoth, Wyoming M3.6 126 km 0 km
Mar 30, 2014 Wyoming M3.6 134 km 4 km
Mar 26, 2014 20 km SSW of Mammoth, Wyoming M3.5 139 km 5 km
Jul 20, 1992 51 km SSE of Mammoth, Wyoming M3.5 127 km 2 km
Jun 4, 2014 21 km SSW of Mammoth, Wyoming M3.5 139 km 8 km
Nov 24, 2000 25 km S of Mammoth, Wyoming M3.5 136 km 8 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

38 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 3 injuries.

Date Rating Distance Path Fatalities
Jun 16, 1965 EF3 73 km 20.6 mi 0
Jun 20, 2010 EF2 75 km 0.7 mi 0
Jun 16, 2010 EF2 43 km 1.0 mi 0
Jul 11, 1978 EF2 80 km 0.4 mi 0
Jun 26, 1964 EF2 74 km 1.0 mi 0
Jul 2, 1958 EF2 75 km 0.5 mi 0
Jun 21, 1991 EF1 69 km 0.2 mi 0
May 18, 1991 EF1 69 km 0.2 mi 0
May 24, 1990 EF1 91 km 0.2 mi 0
May 24, 1990 EF1 45 km 0.2 mi 0
Aug 25, 1986 EF1 93 km 1.0 mi 0
Jul 24, 1981 EF1 85 km 0.1 mi 0
Jun 18, 1978 EF1 93 km 0.1 mi 0
Jun 26, 1976 EF1 73 km 2.0 mi 0
Aug 22, 1965 EF1 81 km 1.5 mi 0
Aug 12, 1958 EF1 50 km 0.5 mi 0
Jul 6, 1955 EF1 91 km 2.0 mi 0
May 16, 2015 EF0 100 km 1.4 mi 0
May 24, 2014 EF0 75 km 0.8 mi 0
Jun 6, 2011 EF0 62 km 0.0 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Nearby Volcanoes

1 volcano within 200 km. Closest: Yellowstone (155 km).

Name Type Elevation Last Eruption Distance
Yellowstone Caldera(s) 2,805 m (9,203 ft) -1350 155 km
Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: CLOVERMIST (303,427 acres, 1988).

Year Name Acres Burned Distance
1988 CLOVERMIST 303,427 86 km
2006 DERBY 200,993 56 km
1988 STORM CREEK 116,027 69 km
1988 HELLROARING 77,598 94 km
2008 GUNBARREL 69,730 92 km
2003 HOBBLE 38,365 66 km
1988 CLOVER 34,035 97 km
2021 ROBERTSON DRAW 31,132 30 km
2006 JUNGLE 23,846 91 km
1996 SHEPARD MTN 17,379 35 km
2016 BUFFALO 13,706 96 km
1994 BLACK BUTTE 10,231 71 km
2008 CASCADE 10,017 30 km
2010 STUMP GULCH 8,873 43 km
2021 TROUT CREEK 7,804 42 km
2006 PASSAGE FALLS 6,837 99 km
2011 HOLE IN THE WALL 6,559 40 km
2003 DEEP LAKE 5,466 51 km
2002 COW CREEK 5,162 25 km
2002 RED WAFFLE 5,060 65 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 26°F (-4°C) 0.9 in
February 28°F (-3°C) 0.7 in Driest
March 35°F (2°C) 1.3 in
April 43°F (6°C) 1.9 in
May 52°F (11°C) 3.0 in Wettest
June 61°F (16°C) 2.2 in
July 66°F (19°C) 1.3 in
August 68°F (20°C) 1.1 in Warmest
September 57°F (14°C) 1.7 in
October 47°F (8°C) 1.4 in
November 32°F (0°C) 0.9 in
December 23°F (-5°C) 0.8 in Coldest

Roberts has a seasonal temperature swing of 44°F / from 23°F in December to 68°F in August. Total annual precipitation is 17.1 inches, with May being the wettest month (3.0") and February the driest (0.7").

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