Northwest, ND climate
Northwest has cold winters and pleasant summers, with very little rain. A typical July afternoon reaches 80°, a January night drops to 3°.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Northwest feels like
Winter
Spring
Summer
Fall
Northwest weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 20° | 3° | 0.5" | -2° – 25° |
| February | 24° | 7° | 0.6" | -2° – 27° |
| March | 37° | 18° | 1.0" | 17° – 41° |
| April | 52° | 30° | 1.7" | 31° – 48° |
| May | 66° | 42° | 3.2" | 49° – 61° |
| June | 75° | 53° | 3.7" | 58° – 69° |
| July | 80° | 57° | 3.5" | 61° – 74° |
| August | 79° | 55° | 2.5" | 61° – 72° |
| September | 70° | 46° | 2.3" | 52° – 63° |
| October | 54° | 33° | 1.9" | 35° – 49° |
| November | 37° | 20° | 0.7" | 16° – 40° |
| December | 25° | 9° | 0.6" | 3° – 24° |
| Year | 51° | 31° | 22.1" |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in Northwest
Northwest gets 22 inches of rain and melted snow a year. June is the wettest month and January the driest.
About 148 frost-free days a year
In half of years the last 32° night comes by May 7 and the first one by October 2. That leaves about 148 frost-free days for gardens, shorter than 82% of U.S. towns.
Heating and cooling a home in Northwest
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Northwest, 95% of that work is heating and 5% is cooling, so the furnace matters far more than the air conditioner.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
Northwest and its neighbors
Northwest borders 4 towns with climate data. January nights across them vary by 1.3°. Roloff has both the coldest January nights (2°) and the hottest July afternoons (80°). Northwest’s January low is 3° and its July high 80°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Northwest compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in Northwest averaged 1.1° warmer than the 1900s. The biggest change is in January (+3.6°). The shift is smaller than in 63% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Northwest’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. February swings the most: between 1991 and 2020 its average temperature ranged from -2° to 27°. June is the most reliable, staying within 10°.
Common questions about Northwest’s climate
What is the coldest month in Northwest?
January, with a typical high of 20° and a low of 3°.
What is the hottest month in Northwest?
July, with a typical high of 80° and a low of 57°. About 8 days a year reach 90°.
When is the first frost in Northwest?
In half of years the first 32° night comes by October 2, and the last spring frost by May 7.
What is the rainiest month in Northwest?
June, with 3.7 inches of rain and melted snow. The year totals 22 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Northwest itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Edgeley 3wnw, ND (12 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.