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Weather & Climate in Wilton, ND
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Wilton has a cool climate with an average annual temperature of 41°F (5°C). Winters average 10°F in January while summers reach 69°F in July. The area gets 253 sunny days per year, above the national average. Air quality is rated Good with a median AQI of 38. The city sits at an elevation of 2,175 feet.
Temperature
10°F Jan (-12°C)
69°F Jul (21°C)
| Annual Average | 40.6°F |
| 25% below US avg | |
| January Average | 10°F (-12°C) |
| July Average | 69°F (21°C) |
| Sunny Days | 253 days/yr |
Geography
| Elevation | 2,175 ft (663 m) |
| Area | 0.6 sq mi (1.5 km²) |
| Population Density | 1,039/sq mi |
| Coordinates | 47.1580°N, 100.7840°W |
| Timezone | America/Chicago |
| County | Sheridan County County |
| Nearest Airport | Bismarck Municipal (BIS) 27 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 38.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 5.0 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 31.6 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Relatively Moderate |
| Strong Wind | Very Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Moderate |
| Lightning | Very Low |
| Ice Storm | Relatively Moderate |
| Drought | Very Low |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tornado History
251 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 3 fatalities, 67 injuries.
| Date | Rating | Distance | Path | Fatalities |
| May 29, 1953 | EF5 | 79 km | 14.8 mi | 2 |
| Jul 1, 1952 | EF4 | 25 km | 48.0 mi | 1 |
| Jul 30, 1981 | EF3 | 54 km | 23.9 mi | 0 |
| May 25, 1978 | EF3 | 38 km | 2.5 mi | 0 |
| Jun 18, 1956 | EF3 | 78 km | 10.6 mi | 0 |
| Jun 5, 1956 | EF3 | 56 km | 0.1 mi | 0 |
| Jul 1, 1955 | EF3 | 94 km | 1.3 mi | 0 |
| Jun 15, 1952 | EF3 | 97 km | 1.7 mi | 0 |
| Aug 15, 2022 | EF2 | 68 km | 2.3 mi | 0 |
| Aug 24, 2006 | EF2 | 44 km | 2.0 mi | 0 |
| Jun 6, 2004 | EF2 | 97 km | 8.0 mi | 0 |
| Jul 17, 2001 | EF2 | 84 km | 30.0 mi | 0 |
| Jun 3, 1999 | EF2 | 76 km | 4.0 mi | 0 |
| Jun 18, 1990 | EF2 | 60 km | 6.0 mi | 0 |
| May 30, 1985 | EF2 | 38 km | 0.5 mi | 0 |
| May 24, 1975 | EF2 | 76 km | 33.7 mi | 0 |
| Aug 19, 1974 | EF2 | 91 km | 0.1 mi | 0 |
| May 26, 1974 | EF2 | 90 km | 1.0 mi | 0 |
| Jun 4, 1971 | EF2 | 83 km | 0.5 mi | 0 |
| May 20, 1965 | EF2 | 74 km | 0.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Wildfire History
16 wildfires (100+ acres) recorded within 100 km. Largest: MCCLEAN BOTTOMS (6,421 acres, 2003).
| Year | Name | Acres Burned | Distance |
| 2003 | MCCLEAN BOTTOMS | 6,421 | 62 km |
| 2015 | CANNON BALL | 3,068 | 92 km |
| 2004 | FISCHER | 2,578 | 95 km |
| 2000 | NEUGERFIRE | 2,150 | 96 km |
| 2006 | RIVERDALE WOODS/DOWNSTREAM | 1,705 | 59 km |
| 2002 | BISRURAL2 | 1,649 | 61 km |
| 2015 | BIG LAKE FIRE | 1,587 | 92 km |
| 1993 | UNNAMED | 1,492 | 59 km |
| 2002 | BALE II | 1,179 | 89 km |
| 1999 | SOLEN | 1,155 | 90 km |
| 2006 | RICE LAKE 1 | 1,150 | 41 km |
| 2007 | ROBINSON SUNFLOWER | 1,115 | 54 km |
| 1999 | UNNAMED | 1,062 | 69 km |
| 2002 | UNNAMED | 1,049 | 56 km |
| 2005 | KIMBALL BOTTOMS FIRE | 1,028 | 54 km |
| 2000 | MAC2 | 1,018 | 87 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 10°F (-12°C) | 0.5 in | Coldest |
| February | 15°F (-9°C) | 0.4 in | Driest |
| March | 27°F (-3°C) | 0.8 in | |
| April | 41°F (5°C) | 1.7 in | |
| May | 55°F (13°C) | 2.3 in | |
| June | 64°F (18°C) | 3.2 in | Wettest |
| July | 69°F (21°C) | 2.6 in | Warmest |
| August | 68°F (20°C) | 2.0 in | |
| September | 57°F (14°C) | 1.7 in | |
| October | 45°F (7°C) | 1.2 in | |
| November | 28°F (-2°C) | 0.6 in | |
| December | 14°F (-10°C) | 0.4 in |
Wilton has a seasonal temperature swing of 59°F / from 10°F in January to 69°F in July. Total annual precipitation is 17.4 inches, with June being the wettest month (3.2") and February the driest (0.4").