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Weather & Climate in Harmon, ND

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

Harmon has a cool climate with an average annual temperature of 42°F (6°C). Winters average 13°F in January while summers reach 70°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 18.4 inches (drier than the 38-inch national average). Air quality is rated Good with a median AQI of 38. The city sits at an elevation of 1,710 feet.

Temperature

13°F Jan (-11°C) 70°F Jul (21°C)
Annual Average42.4°F
21% below US avg
January Average13°F (-11°C)
July Average70°F (21°C)
Sunny Days273 days/yr

Geography

Elevation1,710 ft (521 m)
Area1.6 sq mi (4.1 km²)
Population Density122/sq mi
Coordinates46.9544°N, 100.9570°W
TimezoneAmerica/Chicago
CountyBurleigh County County
Nearest AirportBismarck Municipal (BIS)
16 miles away

Precipitation & Snow

Annual Rainfall 18.4"
52% below US avg
Wettest Month (Jun) 2.95"
Driest Month (Jan) 0.39"

Air Quality

AQI Median38.0
RatingGood

Natural Hazard Risk

Overall RiskRelatively Moderate
Risk Score85.1 / 100
Social Vulnerability13.8 / 100
Community Resilience97.2 / 100

Hazard Breakdown

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

Tornado History

248 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 8 fatalities, 103 injuries.

Date Rating Distance Path Fatalities
May 29, 1953 EF5 60 km 14.8 mi 2
Jul 4, 1978 EF4 94 km 26.0 mi 5
Jul 1, 1952 EF4 36 km 48.0 mi 1
Jul 30, 1981 EF3 28 km 23.9 mi 0
May 25, 1978 EF3 15 km 2.5 mi 0
Jun 18, 1956 EF3 75 km 10.6 mi 0
Jun 5, 1956 EF3 72 km 0.1 mi 0
Jul 1, 1955 EF3 81 km 1.3 mi 0
Aug 15, 2022 EF2 89 km 2.3 mi 0
Aug 24, 2006 EF2 51 km 2.0 mi 0
Jul 17, 2001 EF2 100 km 30.0 mi 0
Jun 3, 1999 EF2 82 km 4.0 mi 0
Jun 18, 1990 EF2 51 km 6.0 mi 0
May 30, 1985 EF2 58 km 0.5 mi 0
May 24, 1975 EF2 72 km 33.7 mi 0
Aug 19, 1974 EF2 100 km 0.1 mi 0
Aug 19, 1974 EF2 84 km 0.1 mi 0
May 26, 1974 EF2 82 km 1.0 mi 0
Jun 4, 1971 EF2 63 km 0.5 mi 0
May 20, 1965 EF2 99 km 0.1 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).

Wildfire History

19 wildfires (100+ acres) recorded within 100 km. Largest: TENBROOK (30,588 acres, 2002).

Year Name Acres Burned Distance
2002 TENBROOK 30,588 94 km
2006 LUND 9,425 95 km
1988 UNNAMED 7,593 80 km
2003 MCCLEAN BOTTOMS 6,421 47 km
2015 CANNON BALL 3,068 73 km
2004 FISCHER 2,578 77 km
2000 NEUGERFIRE 2,150 75 km
2006 RIVERDALE WOODS/DOWNSTREAM 1,705 67 km
2002 BISRURAL2 1,649 45 km
2015 BIG LAKE FIRE 1,587 74 km
1993 UNNAMED 1,492 43 km
2002 BALE II 1,179 70 km
1999 SOLEN 1,155 68 km
2006 RICE LAKE 1 1,150 50 km
2007 ROBINSON SUNFLOWER 1,115 64 km
1999 UNNAMED 1,062 63 km
2002 UNNAMED 1,049 39 km
2005 KIMBALL BOTTOMS FIRE 1,028 37 km
2000 MAC2 1,018 69 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 13°F (-11°C) 0.4 in Coldest, Driest
February 17°F (-8°C) 0.4 in
March 28°F (-2°C) 0.7 in
April 43°F (6°C) 1.7 in
May 56°F (13°C) 2.3 in
June 65°F (18°C) 3.0 in Wettest
July 70°F (21°C) 2.7 in Warmest
August 69°F (21°C) 2.0 in
September 59°F (15°C) 1.6 in
October 46°F (8°C) 1.3 in
November 29°F (-2°C) 0.6 in
December 15°F (-9°C) 0.4 in

Harmon has a seasonal temperature swing of 58°F / from 13°F in January to 70°F in July. Total annual precipitation is 17.0 inches, with June being the wettest month (3.0") and January the driest (0.4").

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