Glen Ullin, ND climate
Glen Ullin has cold, snowy winters and pleasant summers, with very little rain. A typical July afternoon reaches 83°, a January night drops to 3°, and about 41 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Glen Ullin feels like
Winter
Spring
Summer
Fall
Glen Ullin weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 24° | 3° | 0.4" | 5.2" | 4 | 2° – 28° |
| February | 28° | 7° | 0.5" | 6.2" | 4 | -2° – 31° |
| March | 41° | 18° | 0.7" | 7.4" | 5 | 17° – 43° |
| April | 55° | 29° | 1.4" | 4.0" | 7 | 35° – 49° |
| May | 67° | 40° | 2.4" | 0.8" | 11 | 49° – 59° |
| June | 76° | 50° | 3.3" | 0 | 11 | 59° – 67° |
| July | 83° | 56° | 2.5" | 0 | 9 | 62° – 76° |
| August | 83° | 54° | 2.1" | 0 | 7 | 63° – 74° |
| September | 73° | 44° | 1.7" | 0.2" | 7 | 53° – 64° |
| October | 56° | 31° | 1.4" | 2.5" | 6 | 36° – 49° |
| November | 40° | 18° | 0.6" | 6.6" | 4 | 16° – 39° |
| December | 28° | 8° | 0.5" | 7.7" | 5 | 6° – 27° |
| Year | 54° | 30° | 17.4" | 40.6" | 80 |
“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 Glen Ullin
Glen Ullin gets 17 inches of rain and melted snow a year. June is the wettest month and January the driest. Rain or snow falls on about 80 days a year.
About 123 frost-free days a year
In half of years the last 32° night comes by May 19 and the first one by September 21. That leaves about 123 frost-free days for gardens, shorter than 97% of U.S. towns.
Heating and cooling a home in Glen Ullin
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Glen Ullin, 96% of that work is heating and 4% 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.
How Glen Ullin 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 Glen Ullin averaged 1.2° warmer than the 1900s. The biggest change is in January (+4.0°). The shift is larger than in 52% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Glen Ullin’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 31°. June is the most reliable, staying within 9°.
Common questions about Glen Ullin’s climate
What is the coldest month in Glen Ullin?
January, with a typical high of 24° and a low of 3°.
What is the hottest month in Glen Ullin?
July, with a typical high of 83° and a low of 56°. About 15 days a year reach 90°.
How much snow does Glen Ullin get?
About 41 inches in a normal winter, most of it in December.
When is the first frost in Glen Ullin?
In half of years the first 32° night comes by September 21, and the last spring frost by May 19.
What is the rainiest month in Glen Ullin?
June, with 3.3 inches of rain and melted snow. The year totals 17 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Glen Ullin itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Hebron, ND (12 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.