All Countries
Weather & Climate in Olney, MT
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Olney has a cool climate with an average annual temperature of 40°F (4°C). Winters average 20°F in January while summers reach 62°F in July. The area gets 269 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 20.3 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 3,256 feet.
Temperature
20°F Jan (-7°C)
62°F Jul (16°C)
| Annual Average | 39.7°F |
| 26% below US avg | |
| January Average | 20°F (-7°C) |
| July Average | 62°F (16°C) |
| Sunny Days | 269 days/yr |
Geography
| Elevation | 3,256 ft (992 m) |
| Area | 1.3 sq mi (3.4 km²) |
| Population Density | 93/sq mi |
| Coordinates | 48.5470°N, 114.5726°W |
| Timezone | America/Denver |
| County | Flathead County County |
| Nearest Airport | Glacier Park International (FCA) 22 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 26.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 86.5 / 100 |
| Social Vulnerability | 15.9 / 100 |
| Community Resilience | 46.3 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Moderate |
| Wildfire | Relatively Moderate |
| Flood | Relatively Moderate |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively High |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Moderate |
| Drought | Very Low |
| Cold Wave | Relatively High |
| Landslide | Relatively Moderate |
| Avalanche | Very High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
153 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.7.
| Dec 22, 1998 | Idaho-Montana border region | M4.7 | 77 km | 12 km |
| Mar 4, 2000 | 35 km S of Pincher Creek, Canada | M4.6 | 80 km | 1 km |
| Mar 22, 2006 | 8 km SSW of Rexford, Montana | M4.3 | 56 km | 8 km |
| May 2, 1995 | 2 km NW of Kila, Montana | M4.1 | 46 km | 9 km |
| Jun 29, 1995 | 2 km NNW of Kila, Montana | M4.1 | 46 km | 5 km |
| Apr 15, 1998 | 11 km NE of Swan Lake, Montana | M4.1 | 86 km | 4 km |
| Aug 17, 1994 | 1 km E of Mullan, Idaho | M4.1 | 149 km | 2 km |
| Jan 20, 1998 | 15 km SSE of Happys Inn, Montana | M4.0 | 75 km | 7 km |
| Apr 1, 1992 | 10 km ESE of Swan Lake, Montana | M4.0 | 97 km | 5 km |
| Apr 24, 2015 | 8 km WSW of Hope, Idaho | M3.9 | 141 km | 17 km |
| May 2, 1995 | 3 km WNW of Kila, Montana | M3.8 | 46 km | 9 km |
| Jul 2, 1992 | 4 km SSE of South Browning, Montana | M3.8 | 116 km | 10 km |
| Sep 26, 2004 | 14 km WSW of Pablo, Montana | M3.8 | 110 km | 17 km |
| Feb 28, 2000 | 10 km NNE of Sparwood, Canada | M3.8 | 143 km | 10 km |
| Aug 19, 1999 | 12 km ENE of Happys Inn, Montana | M3.7 | 56 km | 14 km |
| Apr 24, 2015 | 12 km SSW of East Hope, Idaho | M3.7 | 140 km | 9 km |
| Oct 2, 1995 | 18 km E of Finley Point, Montana | M3.7 | 108 km | 5 km |
| Mar 14, 1997 | 1 km E of Mullan, Idaho | M3.6 | 150 km | 2 km |
| Oct 26, 1999 | 23 km WNW of Niarada, Montana | M3.6 | 75 km | 12 km |
| Feb 2, 1997 | 1 km NNE of Lindisfarne, Montana | M3.6 | 85 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
5 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF0.
| Date | Rating | Distance | Path | Fatalities |
| Nov 4, 2013 | EF0 | 74 km | 0.8 mi | 0 |
| Sep 1, 2011 | EF0 | 94 km | 0.7 mi | 0 |
| Apr 9, 2008 | EF0 | 40 km | 0.0 mi | 0 |
| Jul 18, 2007 | EF0 | 73 km | 8.0 mi | 0 |
| Sep 10, 2000 | EF0 | 23 km | 2.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: CHIPPY CREEK (95,656 acres, 2007).
| Year | Name | Acres Burned | Distance |
| 2007 | CHIPPY CREEK | 95,656 | 85 km |
| 2001 | MOOSE | 73,210 | 37 km |
| 2003 | ROBERT | 54,500 | 38 km |
| 2003 | WEDGE CANYON | 51,987 | 42 km |
| 1988 | RED BENCH | 33,845 | 35 km |
| 2006 | RED EAGLE | 32,563 | 85 km |
| 2007 | BRUSH CREEK | 30,166 | 27 km |
| 2017 | CARIBOU | 28,101 | 75 km |
| 2003 | RAMPAGE COMPLEX (DOUBLE MOUNTAIN 2) | 23,680 | 74 km |
| 2022 | ELMO | 22,148 | 77 km |
| 2017 | WEST FORK | 21,154 | 76 km |
| 2023 | NIARADA | 20,686 | 83 km |
| 2003 | BLACKFOOT LAKE COMPLEX (BLACKFOOT LAKE) | 18,274 | 58 km |
| 2015 | THOMPSON | 18,049 | 75 km |
| 2003 | TRAPPER CREEK FIRE (TRAPPER CREEK) | 18,028 | 60 km |
| 2017 | SPRAGUE | 16,897 | 54 km |
| 1994 | LITTLE WOLF | 15,714 | 33 km |
| 2018 | HOWE RIDGE | 14,747 | 48 km |
| 2017 | MOOSE PEAK | 14,085 | 87 km |
| 2003 | TRAPPER CREEK FIRE (WOLF GUN) | 13,920 | 45 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 20°F (-7°C) | 2.6 in | Coldest |
| February | 24°F (-4°C) | 2.0 in | |
| March | 31°F (-0°C) | 1.7 in | |
| April | 39°F (4°C) | 1.7 in | |
| May | 48°F (9°C) | 2.3 in | |
| June | 55°F (13°C) | 2.7 in | Wettest |
| July | 62°F (16°C) | 1.6 in | Warmest |
| August | 61°F (16°C) | 1.5 in | Driest |
| September | 52°F (11°C) | 1.6 in | |
| October | 42°F (5°C) | 1.6 in | |
| November | 29°F (-1°C) | 2.6 in | |
| December | 21°F (-6°C) | 2.6 in |
Olney has a seasonal temperature swing of 42°F / from 20°F in January to 62°F in July. Total annual precipitation is 24.5 inches, with June being the wettest month (2.7") and August the driest (1.5").