Rock, ND climate
Rock has cold, snowy winters and warm summers, with very little rain. A typical July afternoon reaches 84°, a January night drops to 4°, and about 57 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Rock feels like
Winter
Spring
Summer
Fall
Rock 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 | 25° | 4° | 0.4" | 8.4" | 4 | 3° – 28° |
| February | 29° | 8° | 0.5" | 8.9" | 4 | -1° – 31° |
| March | 42° | 19° | 0.8" | 12.4" | 5 | 18° – 44° |
| April | 56° | 29° | 1.5" | 5.4" | 6 | 36° – 49° |
| May | 67° | 41° | 2.6" | 0.3" | 8 | 49° – 60° |
| June | 77° | 51° | 3.1" | 0 | 9 | 59° – 68° |
| July | 84° | 56° | 2.7" | 0 | 7 | 62° – 77° |
| August | 83° | 54° | 1.9" | 0 | 5 | 63° – 74° |
| September | 73° | 44° | 1.5" | 0 | 5 | 53° – 64° |
| October | 57° | 31° | 1.5" | 4.1" | 5 | 36° – 49° |
| November | 41° | 18° | 0.6" | 8.3" | 4 | 16° – 40° |
| December | 29° | 8° | 0.5" | 8.9" | 5 | 7° – 27° |
| Year | 55° | 30° | 17.5" | 56.7" | 67 |
“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 Rock
Rock gets 18 inches of rain and melted snow a year. June is the wettest month and January the driest. Rain or snow falls on about 67 days a year.
About 124 frost-free days a year
In half of years the last 32° night comes by May 20 and the first one by September 23. That leaves about 124 frost-free days for gardens, shorter than 96% of U.S. towns.
Heating and cooling a home in Rock
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Rock, 94% of that work is heating and 6% 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.
Rock and its neighbors
Rock borders 2 towns with climate data. January nights across them vary by 0.5°. Elm has the coldest January nights (4°) and Fisher the hottest July afternoons (84°). Rock’s January low is 4° and its July high 84°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Rock 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 Rock averaged 1.3° warmer than the 1900s. The biggest change is in January (+4.3°). The shift is larger than in 59% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Rock’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 31°. June is the most reliable, staying within 9°.
Common questions about Rock’s climate
What is the coldest month in Rock?
January, with a typical high of 25° and a low of 4°.
What is the hottest month in Rock?
July, with a typical high of 84° and a low of 56°. About 21 days a year reach 90°.
How much snow does Rock get?
About 57 inches in a normal winter, most of it in March.
When is the first frost in Rock?
In half of years the first 32° night comes by September 23, and the last spring frost by May 20.
What is the rainiest month in Rock?
June, with 3.1 inches of rain and melted snow. The year totals 18 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Rock itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Elgin, ND (8 mi, snow) and Pretty Rock, 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.