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Weather & Climate in Oslo, MN
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Oslo has a cool climate with an average annual temperature of 42°F (6°C). Winters average 8°F in January while summers reach 71°F in July / a wide seasonal temperature swing of 63°F. The area gets 200 sunny days per year. Air quality is rated Good with a median AQI of 36. The city sits at an elevation of 808 feet.
Temperature
8°F Jan (-14°C)
71°F Jul (22°C)
| Annual Average | 42.0°F |
| 22% below US avg | |
| January Average | 8°F (-14°C) |
| July Average | 71°F (22°C) |
| Sunny Days | 200 days/yr |
Geography
| Elevation | 808 ft (246 m) |
| Area | 0.4 sq mi (1.0 km²) |
| Population Density | 803/sq mi |
| Coordinates | 48.1956°N, 97.1314°W |
| Timezone | America/Chicago |
| County | Walsh County County |
| Nearest Airport | Grand Forks International (GFK) 17 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 36.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 29.0 / 100 |
| Social Vulnerability | 13.6 / 100 |
| Community Resilience | 48.2 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Relatively Low |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively High |
| Lightning | Very Low |
| Ice Storm | Relatively High |
| Drought | Very Low |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tornado History
426 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 5 fatalities, 49 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 17, 2010 | EF4 | 74 km | 17.0 mi | 0 |
| Aug 26, 2007 | EF4 | 64 km | 5.0 mi | 1 |
| Jun 6, 1999 | EF4 | 66 km | 8.0 mi | 0 |
| Aug 27, 2016 | EF3 | 79 km | 3.0 mi | 0 |
| Jun 17, 2010 | EF3 | 94 km | 15.0 mi | 1 |
| Aug 26, 2007 | EF3 | 77 km | 6.0 mi | 0 |
| May 19, 2004 | EF3 | 81 km | 1.5 mi | 0 |
| Jul 21, 1987 | EF3 | 93 km | 1.0 mi | 0 |
| Jun 16, 1973 | EF3 | 92 km | 0.1 mi | 0 |
| Jun 21, 1971 | EF3 | 96 km | 13.7 mi | 0 |
| Aug 11, 1958 | EF3 | 33 km | 0.1 mi | 0 |
| Aug 9, 2021 | EF2 | 80 km | 2.9 mi | 0 |
| Jul 11, 2017 | EF2 | 63 km | 22.0 mi | 0 |
| Jul 11, 2017 | EF2 | 91 km | 11.6 mi | 0 |
| Aug 28, 2016 | EF2 | 94 km | 9.6 mi | 0 |
| Jun 27, 2015 | EF2 | 56 km | 3.0 mi | 0 |
| Sep 19, 2014 | EF2 | 74 km | 10.0 mi | 0 |
| Jul 21, 2014 | EF2 | 59 km | 37.9 mi | 0 |
| Aug 10, 2010 | EF2 | 57 km | 0.9 mi | 0 |
| Jun 17, 2010 | EF2 | 35 km | 7.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: JUNEBERRY 3 (29,455 acres, 2011).
| Year | Name | Acres Burned | Distance |
| 2011 | JUNEBERRY 3 | 29,455 | 99 km |
| 1990 | UNNAMED | 26,345 | 93 km |
| 1988 | UNNAMED | 17,778 | 84 km |
| 2003 | CARIBOU | 16,184 | 99 km |
| 2021 | OXCART | 12,538 | 83 km |
| 1988 | UNNAMED | 11,927 | 96 km |
| 2003 | UNNAMED | 11,544 | 95 km |
| 1987 | UNNAMED | 10,819 | 85 km |
| 2018 | NORTH COUNTY ROAD 7 | 9,471 | 95 km |
| 2000 | UNNAMED | 9,194 | 96 km |
| 2006 | UNNAMED | 6,964 | 89 km |
| 2000 | UNNAMED | 6,057 | 84 km |
| 1985 | UNNAMED | 5,891 | 96 km |
| 2024 | AGASSIZ NWR PROJECT RX | 5,562 | 90 km |
| 2008 | UNNAMED | 4,932 | 86 km |
| 2008 | UNNAMED | 4,724 | 96 km |
| 2012 | COUNTY 27 FIRE | 4,653 | 59 km |
| 1998 | 16 A | 4,255 | 90 km |
| 1988 | UNNAMED | 4,073 | 90 km |
| 2003 | NORTH EAST WEIR FIRE | 3,956 | 89 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 8°F (-14°C) | 0.7 in | Coldest |
| February | 10°F (-12°C) | 0.5 in | Driest |
| March | 24°F (-5°C) | 0.9 in | |
| April | 41°F (5°C) | 1.4 in | |
| May | 56°F (13°C) | 2.2 in | |
| June | 65°F (18°C) | 3.1 in | Wettest |
| July | 71°F (22°C) | 2.8 in | Warmest |
| August | 67°F (20°C) | 2.4 in | |
| September | 57°F (14°C) | 2.0 in | |
| October | 44°F (7°C) | 1.4 in | |
| November | 26°F (-3°C) | 0.8 in | |
| December | 11°F (-12°C) | 0.6 in |
Oslo has a seasonal temperature swing of 64°F / from 8°F in January to 71°F in July. Total annual precipitation is 18.8 inches, with June being the wettest month (3.1") and February the driest (0.5").