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Weather & Climate in New Rockport Colony, MT
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
New Rockport Colony has a cool climate with an average annual temperature of 43°F (6°C). Winters average 24°F in January while summers reach 66°F in July. The area gets 273 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 13.1 inches (drier than the 38-inch national average). 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 3,731 feet.
Temperature
24°F Jan (-5°C)
66°F Jul (19°C)
| Annual Average | 43.3°F |
| 20% below US avg | |
| January Average | 24°F (-5°C) |
| July Average | 66°F (19°C) |
| Sunny Days | 273 days/yr |
Geography
| Elevation | 3,731 ft (1,137 m) |
| Area | 3.5 sq mi (9.1 km²) |
| Population Density | 38/sq mi |
| Coordinates | 47.8598°N, 112.0348°W |
| Timezone | America/Denver |
| County | Teton County County |
| Nearest Airport | Great Falls International (GTF) 40 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 26.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 19.0 / 100 |
| Social Vulnerability | 21.3 / 100 |
| Community Resilience | 57.6 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Moderate |
| Lightning | Very Low |
| Ice Storm | Very Low |
| Drought | Relatively Low |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
| Avalanche | Relatively Moderate |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
308 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.8.
| Jul 6, 2017 | 11 km SE of Lincoln, Montana | M5.8 | 116 km | 12 km |
| Jul 6, 2017 | 15 km S of Lincoln, Montana | M5.0 | 126 km | 15 km |
| Jul 6, 2017 | 14 km SE of Lincoln, Montana | M4.4 | 118 km | 10 km |
| Jan 30, 2016 | 19 km E of Lincoln, Montana | M4.3 | 106 km | 2 km |
| Apr 15, 1998 | 11 km NE of Swan Lake, Montana | M4.1 | 129 km | 4 km |
| Jul 19, 2002 | 43 km NE of Seeley Lake, Montana | M4.0 | 90 km | 25 km |
| Jul 17, 2017 | 12 km ESE of Lincoln, Montana | M4.0 | 114 km | 13 km |
| Jul 6, 2017 | 14 km SSE of Lincoln, Montana | M4.0 | 121 km | 9 km |
| Apr 1, 1992 | 10 km ESE of Swan Lake, Montana | M4.0 | 126 km | 5 km |
| Apr 1, 1993 | 15 km E of Lincoln, Montana | M3.9 | 106 km | 5 km |
| Oct 19, 2017 | 12 km SE of Lincoln, Montana | M3.9 | 115 km | 4 km |
| Aug 16, 1994 | 27 km W of Chester, Montana | M3.9 | 87 km | 5 km |
| Jun 2, 1996 | 37 km N of Ovando, Montana | M3.9 | 95 km | 5 km |
| Mar 13, 2017 | 4 km ESE of Avon, Montana | M3.8 | 148 km | 20 km |
| May 7, 1992 | 14 km NE of Seeley Lake, Montana | M3.8 | 118 km | 5 km |
| Jul 5, 2024 | 24 km ENE of Seeley Lake, Montana | M3.8 | 108 km | 22 km |
| Mar 21, 1992 | 20 km NE of Seeley Lake, Montana | M3.8 | 112 km | 5 km |
| Jul 2, 1992 | 4 km SSE of South Browning, Montana | M3.8 | 102 km | 10 km |
| Jun 1, 1996 | 23 km N of Ovando, Montana | M3.8 | 110 km | 10 km |
| May 1, 1997 | 35 km SSE of Magrath, Canada | M3.8 | 148 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
33 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 5 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jul 2, 1966 | EF2 | 45 km | 0.8 mi | 0 |
| Jun 13, 2006 | EF1 | 97 km | 10.0 mi | 0 |
| Jul 3, 1998 | EF1 | 49 km | 0.5 mi | 0 |
| Jun 6, 1994 | EF1 | 86 km | 0.1 mi | 0 |
| Jul 5, 1988 | EF1 | 64 km | 0.2 mi | 0 |
| Jun 1, 1980 | EF1 | 82 km | 0.1 mi | 0 |
| Jul 3, 1978 | EF1 | 71 km | 1.0 mi | 0 |
| Jul 3, 1978 | EF1 | 71 km | 1.0 mi | 0 |
| Jul 3, 1978 | EF1 | 71 km | 1.0 mi | 0 |
| Jun 1, 1977 | EF1 | 43 km | 0.1 mi | 0 |
| Jun 1, 1977 | EF1 | 87 km | 0.1 mi | 0 |
| Jul 10, 1965 | EF1 | 92 km | 0.2 mi | 0 |
| Jul 2, 1964 | EF1 | 29 km | 27.0 mi | 0 |
| Jun 22, 1962 | EF1 | 31 km | 0.1 mi | 0 |
| Jun 29, 1961 | EF1 | 87 km | 0.1 mi | 0 |
| Jun 23, 2018 | EF0 | 96 km | 1.4 mi | 0 |
| Jun 2, 1999 | EF0 | 84 km | 0.1 mi | 0 |
| Jun 6, 1994 | EF0 | 79 km | 0.1 mi | 0 |
| Jun 21, 1993 | EF0 | 67 km | 0.1 mi | 0 |
| Jun 21, 1993 | EF0 | 73 km | 0.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: CANYON CREEK (167,875 acres, 1988).
| Year | Name | Acres Burned | Distance |
| 1988 | CANYON CREEK | 167,875 | 87 km |
| 2007 | FOOL CREEK | 53,912 | 68 km |
| 2015 | FAMILY PEAK COMPLEX | 49,769 | 81 km |
| 2007 | AHORN | 45,633 | 77 km |
| 1988 | GATES PARK | 42,493 | 67 km |
| 2003 | LINCOLN COMPLEX (SNOWBANK) | 36,987 | 96 km |
| 2021 | HARRIS MTN | 31,792 | 87 km |
| 2017 | ALICE CREEK | 29,971 | 85 km |
| 2012 | ELBOW PASS COMPLEX | 28,989 | 83 km |
| 2017 | SCALP | 20,309 | 76 km |
| 2017 | STRAWBERRY | 17,781 | 73 km |
| 2007 | CORPORAL | 14,054 | 97 km |
| 2013 | RED SHALE | 13,712 | 69 km |
| 2015 | MOOSE RIDGE | 11,395 | 66 km |
| 2003 | LITTLE SALMON CREEK WILDLAND FIRE COMPLEX (MID) | 10,052 | 97 km |
| 2017 | CRUCIFIXION CREEK | 9,971 | 90 km |
| 1993 | FREEZEOUT LAKE | 9,793 | 23 km |
| 2000 | HELEN CREEK | 7,741 | 99 km |
| 2001 | BIGGS FLAT | 7,303 | 66 km |
| 2013 | DAMNATION | 7,296 | 99 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 24°F (-5°C) | 0.4 in | Coldest |
| February | 30°F (-1°C) | 0.3 in | Driest |
| March | 36°F (2°C) | 0.5 in | |
| April | 45°F (7°C) | 0.8 in | |
| May | 54°F (12°C) | 2.1 in | |
| June | 62°F (16°C) | 2.2 in | Wettest |
| July | 66°F (19°C) | 1.3 in | |
| August | 66°F (19°C) | 1.4 in | Warmest |
| September | 56°F (13°C) | 1.1 in | |
| October | 47°F (8°C) | 0.5 in | |
| November | 34°F (1°C) | 0.3 in | |
| December | 27°F (-3°C) | 0.3 in |
New Rockport Colony has a seasonal temperature swing of 42°F / from 24°F in January to 66°F in August. Total annual precipitation is 11.2 inches, with June being the wettest month (2.2") and February the driest (0.3").