Island Park 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.
A year in Island Park at a glance
Each month’s typical high and low, and what it brings.
What stands out about Island Park’s climate
Read from where Island Park sits among North Dakota’s towns. The page puts what stands out first.
47 inches of snow, 23 of rain and melt
June is the wettest month and January the driest. Rain or snow falls on about 83 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
What a year in Island Park feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 136 frost-free days a year
In half of years the last 32° night comes by May 12 and the first by September 27.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
Living with Island Park’s climate
What the numbers mean for a garden, a driveway, a furnace and a free afternoon.
136 frost-free days. The last frost comes by May 12 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Sep 27.
About 47" a winter over 14 days with an inch or more, most in January.
Months averaging under 55° run from October through April. Heating is 95% of the year’s heating-and-cooling load.
About 14 days a year reach 90°, and July afternoons average 82°.
The nicest months are May, June, July, August and September. 13 miles of trails are waiting.
Parks & trails →Normals are averages. Ice storms, nor’easters, floods and heat waves are on the natural hazards page.
Natural hazards →Island Park and its neighbors
Tuller has the coldest January nights next door (1°) and Big Bend the hottest July afternoons (83°). Tap a town to see its climate.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
Warmer than it used to be
The last 30 years in Island Park averaged 1.2° warmer than the 1900s. The biggest change is in January (+3.3°).
A smaller shift than in 56% of U.S. towns.
Change by month
How Island Park compares
Against every U.S. town on TownTapestry, each counted once, with its place in North Dakota.
Island Park 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° – 51° |
| May | 68° | 44° | 3.1" | 0 | 10 | 51° – 62° |
| June | 77° | 55° | 3.9" | 0 | 11 | 61° – 70° |
| July | 82° | 59° | 3.3" | 0 | 10 | 63° – 76° |
| August | 81° | 56° | 2.8" | 0 | 8 | 63° – 73° |
| September | 72° | 47° | 2.5" | 0 | 7 | 53° – 64° |
| October | 56° | 34° | 2.1" | 1.5" | 7 | 37° – 50° |
| November | 39° | 21° | 0.7" | 7.4" | 5 | 17° – 40° |
| December | 25° | 8° | 0.7" | 8.7" | 5 | 3° – 25° |
| Year | 53° | 32° | 22.8" | 46.7" | 83 |
Heating and cooling a home in Island Park
95% of the work is heating, so the furnace matters far more than the air conditioner.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. Source: NOAA station normals.
How much a month can swing
A normal is an average. January swings the most: from 1991 to 2020 its average ranged from -4° to 25°. June is the most reliable, staying within 9°.
Common questions about Island Park’s climate
What is the coldest month in Island Park?
January, with a typical high of 20° and a low of 1°.
What is the hottest month in Island Park?
July, with a typical high of 82° and a low of 59°. About 14 days a year reach 90°.
How much snow does Island Park get?
About 47 inches in a normal winter, most of it in January.
When is the first frost in Island Park?
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 Island Park?
June, with 3.9 inches of rain and melted snow. The year totals 23 inches.
Neighbors talk weather
Gardens, snow, and the best days of the year in Island Park.
Your answer becomes a post in Town Square.
Temperatures and rainfall come from NOAA’s gridded climate normals for Island Park itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Lisbon, ND (3 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000. Today’s forecast: National Weather Service.