Rock Springs, WI climate
Rock Springs has cold, snowy winters and pleasant summers. A typical July afternoon reaches 82°, a January night drops to 9°, and about 44 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Rock Springs feels like
Winter
Spring
Summer
Fall
Rock Springs 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 | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 27° | 9° | 1.3" | 9.9" | 8 | 21 | 6° – 31° |
| February | 32° | 12° | 1.3" | 14.8" | 8 | 24 | 9° – 34° |
| March | 44° | 23° | 2.2" | 5.1" | 9 | 10 | 25° – 49° |
| April | 57° | 34° | 4.0" | 2.7" | 12 | 2 | 36° – 51° |
| May | 69° | 46° | 4.4" | 0 | 13 | 0 | 52° – 64° |
| June | 79° | 56° | 5.3" | 0 | 11 | 0 | 64° – 72° |
| July | 82° | 60° | 4.4" | 0 | 9 | 0 | 65° – 78° |
| August | 80° | 57° | 4.3" | 0 | 10 | 0 | 64° – 75° |
| September | 73° | 49° | 3.7" | 0 | 10 | 0 | 54° – 67° |
| October | 60° | 37° | 2.9" | 0.4" | 11 | 0 | 44° – 55° |
| November | 44° | 27° | 2.1" | 1.7" | 8 | 2 | 27° – 46° |
| December | 32° | 16° | 1.7" | 9.3" | 10 | 14 | 11° – 35° |
| Year | 56° | 36° | 37.5" | 43.9" | 119 | 71 |
“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 Springs
Rock Springs gets 37 inches of rain and melted snow a year. June is the wettest month and January the driest. Rain or snow falls on about 119 days a year. Snow covers the ground about 71 days of the year.
About 156 frost-free days a year
In half of years the last 32° night comes by May 2 and the first one by October 7. That leaves about 156 frost-free days for gardens, shorter than 75% of U.S. towns.
Heating and cooling a home in Rock Springs
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Rock Springs, 93% of that work is heating and 7% 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 Rock Springs 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 Springs averaged 1.6° warmer than the 1900s. The biggest change is in December (+3.4°). The shift is larger than in 74% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Rock Springs’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. January swings the most: between 1991 and 2020 its average temperature ranged from 6° to 31°. June is the most reliable, staying within 8°.
Common questions about Rock Springs’s climate
What is the coldest month in Rock Springs?
January, with a typical high of 27° and a low of 9°.
What is the hottest month in Rock Springs?
July, with a typical high of 82° and a low of 60°. About 7 days a year reach 90°.
How much snow does Rock Springs get?
About 44 inches in a normal winter, most of it in February.
When is the first frost in Rock Springs?
In half of years the first 32° night comes by October 7, and the last spring frost by May 2.
What is the rainiest month in Rock Springs?
June, with 5.3 inches of rain and melted snow. The year totals 37 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Rock Springs itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Reedsburg, WI (5 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.