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Weather & Climate in Portland, ND

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

Portland has a cool climate with an average annual temperature of 39°F (4°C). Winters average 6°F in January while summers reach 68°F in July / a wide seasonal temperature swing of 62°F. The area gets 276 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 23.9 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 984 feet.

Temperature

6°F Jan (-14°C) 68°F Jul (20°C)
Annual Average39.4°F
27% below US avg
January Average6°F (-14°C)
July Average68°F (20°C)
Sunny Days276 days/yr

Geography

Elevation984 ft (300 m)
Area0.9 sq mi (2.2 km²)
Population Density660/sq mi
Coordinates47.4995°N, 97.3693°W
TimezoneAmerica/Chicago
CountyTraill County County
Nearest AirportGrand Forks International (GFK)
32 miles away

Precipitation & Snow

Annual Rainfall 23.9"
37% below US avg
Wettest Month (Jun) 3.15"
Driest Month (Feb) 0.51"

Air Quality

AQI Median38.0
RatingGood

Natural Hazard Risk

Overall RiskVery Low
Risk Score11.0 / 100
Social Vulnerability10.6 / 100
Community Resilience88.3 / 100

Hazard Breakdown

Tornado Relatively Low
Earthquake Very Low
Wildfire Very Low
Flood Very Low
Hail Relatively Moderate
Strong Wind Relatively 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

512 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 18 fatalities, 197 injuries.

Date Rating Distance Path Fatalities
Jun 20, 1957 EF5 67 km 52.4 mi 10
Jun 17, 2010 EF4 7 km 17.0 mi 0
Aug 26, 2007 EF4 30 km 5.0 mi 1
Jun 28, 1975 EF4 85 km 5.4 mi 0
Aug 27, 2016 EF3 20 km 3.0 mi 0
Jun 17, 2010 EF3 91 km 15.0 mi 1
Aug 26, 2007 EF3 51 km 6.0 mi 0
Jul 18, 2001 EF3 84 km 5.0 mi 0
Jul 21, 1987 EF3 53 km 1.0 mi 0
Jun 28, 1975 EF3 92 km 2.3 mi 0
Jun 16, 1973 EF3 27 km 0.1 mi 0
Jun 15, 1973 EF3 71 km 0.1 mi 0
Jun 21, 1971 EF3 42 km 13.7 mi 0
Aug 23, 1968 EF3 93 km 8.5 mi 0
Sep 6, 1958 EF3 82 km 2.9 mi 0
Aug 11, 1958 EF3 46 km 0.1 mi 0
Jul 16, 1957 EF3 68 km 0.1 mi 0
Aug 30, 1956 EF3 79 km 5.1 mi 0
Jun 13, 1950 EF3 88 km 2.0 mi 0
Aug 9, 2021 EF2 42 km 2.9 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: OXCART (12,538 acres, 2021).

Year Name Acres Burned Distance
2021 OXCART 12,538 87 km
2008 UNNAMED 2,420 83 km
2024 4 SQUARE MILE RX 2,320 88 km
2008 UNNAMED 2,092 86 km
2020 GRAVEL PIT 1,468 83 km
2007 UNNAMED 1,270 82 km
2007 FLICKERTAIL 1,239 90 km
2011 NEAL WMA 1,213 86 km
1996 UNNAMED 1,153 100 km
1985 ALICE 02 1,142 83 km
1996 P CHICKEN 1,121 70 km
2006 FULLERS LAKE 06 1,109 30 km
2010 ONSTAD 12 828 79 km
2012 HAM 789 76 km
2007 TNC GR-GOD-3910 749 85 km
2009 TILDEN 27 709 79 km
2008 TRAIN 1 656 86 km
2024 GLACIAL RIDGE CATTAILS RX 579 83 km
1998 FUGLIE 545 92 km
2008 ONSTAD 1 541 80 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 6°F (-14°C) 0.7 in Coldest
February 12°F (-11°C) 0.5 in Driest
March 25°F (-4°C) 1.0 in
April 42°F (6°C) 1.5 in
May 57°F (14°C) 2.2 in
June 66°F (19°C) 3.2 in Wettest
July 68°F (20°C) 2.5 in Warmest
August 68°F (20°C) 2.7 in
September 58°F (14°C) 1.9 in
October 45°F (7°C) 1.7 in
November 27°F (-3°C) 0.8 in
December 12°F (-11°C) 0.6 in

Portland has a seasonal temperature swing of 62°F / from 6°F in January to 68°F in July. Total annual precipitation is 19.1 inches, with June being the wettest month (3.2") and February the driest (0.5").

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