Isley, ND climate
Isley has cold, snowy winters and pleasant summers, with very little rain. A typical July afternoon reaches 82°, a January night drops to 1°, and about 47 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Isley feels like
Winter
Spring
Summer
Fall
Isley 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 | 20° | 1° | 0.6" | 9.7" | 5 | -4° – 25° |
| February | 25° | 5° | 0.6" | 7.1" | 5 | -1° – 27° |
| March | 38° | 18° | 1.0" | 7.8" | 5 | 17° – 42° |
| April | 54° | 31° | 1.7" | 4.5" | 7 | 32° – 50° |
| May | 68° | 43° | 3.1" | 0 | 10 | 51° – 62° |
| June | 77° | 54° | 3.8" | 0 | 11 | 60° – 70° |
| July | 82° | 59° | 3.5" | 0 | 10 | 63° – 76° |
| August | 80° | 56° | 2.6" | 0 | 8 | 63° – 73° |
| September | 72° | 46° | 2.5" | 0 | 7 | 53° – 64° |
| October | 56° | 34° | 2.1" | 1.5" | 7 | 36° – 50° |
| November | 38° | 20° | 0.6" | 7.4" | 5 | 16° – 40° |
| December | 25° | 8° | 0.7" | 8.7" | 5 | 4° – 24° |
| Year | 53° | 31° | 22.8" | 46.7" | 83 |
“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 Isley
Isley gets 23 inches of rain and melted snow a year. June is the wettest month and January the driest. Rain or snow falls on about 83 days a year.
About 136 frost-free days a year
In half of years the last 32° night comes by May 12 and the first one by September 27. That leaves about 136 frost-free days for gardens, shorter than 92% of U.S. towns.
Heating and cooling a home in Isley
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Isley, 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.
Isley and its neighbors
Isley borders 6 towns with climate data. January nights across them vary by 0.5°. Hanson has the coldest January nights (1°) and Divide the hottest July afternoons (82°). Isley’s January low is 1° and its July high 82°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Isley 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 Isley averaged 1.1° warmer than the 1900s. The biggest change is in January (+3.3°). The shift is smaller than in 65% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Isley’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 -1° to 27°. August is the most reliable, staying within 10°.
Common questions about Isley’s climate
What is the coldest month in Isley?
January, with a typical high of 20° and a low of 1°.
What is the hottest month in Isley?
July, with a typical high of 82° and a low of 59°. About 14 days a year reach 90°.
How much snow does Isley get?
About 47 inches in a normal winter, most of it in January.
When is the first frost in Isley?
In half of years the first 32° night comes by September 27, and the last spring frost by May 12.
What is the rainiest month in Isley?
June, with 3.8 inches of rain and melted snow. The year totals 23 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Isley itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Lisbon, ND (15 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.