Butte, SD climate
Butte has cold, snowy winters and warm summers, with very little rain. A typical July afternoon reaches 88°, a January night drops to 12°, and about 50 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Butte feels like
Winter
Spring
Summer
Fall
Butte 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 | 34° | 12° | 0.4" | 7.1" | 5 | 16 | 15° – 38° |
| February | 38° | 15° | 0.6" | 8.4" | 6 | 12 | 12° – 37° |
| March | 49° | 24° | 1.1" | 9.2" | 7 | 8 | 24° – 49° |
| April | 59° | 33° | 2.5" | 8.6" | 10 | 4 | 38° – 52° |
| May | 70° | 44° | 3.5" | 0 | 11 | 0 | 52° – 63° |
| June | 80° | 55° | 3.7" | 0 | 11 | 0 | 63° – 72° |
| July | 88° | 61° | 2.6" | 0 | 9 | 0 | 66° – 81° |
| August | 86° | 59° | 2.3" | 0 | 8 | 0 | 66° – 77° |
| September | 78° | 49° | 1.9" | 0 | 6 | 0 | 57° – 70° |
| October | 62° | 36° | 1.6" | 2.1" | 7 | 1 | 40° – 56° |
| November | 48° | 24° | 0.7" | 6.5" | 5 | 7 | 25° – 45° |
| December | 36° | 15° | 0.5" | 8.4" | 5 | 16 | 15° – 33° |
| Year | 61° | 36° | 21.6" | 50.3" | 89 | 64 |
“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 Butte
Butte gets 22 inches of rain and melted snow a year. June is the wettest month and January the driest. Rain or snow falls on about 89 days a year. Snow covers the ground about 64 days of the year.
About 143 frost-free days a year
In half of years the last 32° night comes by May 10 and the first one by October 1. That leaves about 143 frost-free days for gardens, shorter than 87% of U.S. towns.
Heating and cooling a home in Butte
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Butte, 90% of that work is heating and 10% 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.
Butte and its neighbors
Butte borders 3 towns with climate data. January nights across them vary by 0.8°. Mosher has both the coldest January nights (12°) and the hottest July afternoons (89°). Butte’s January low is 12° and its July high 88°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Butte 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 Butte averaged 1.1° warmer than the 1900s. The biggest change is in January (+3.9°). The shift is smaller than in 58% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Butte’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 12° to 37°. June is the most reliable, staying within 10°.
Common questions about Butte’s climate
What is the coldest month in Butte?
January, with a typical high of 34° and a low of 12°.
What is the hottest month in Butte?
July, with a typical high of 88° and a low of 61°. About 34 days a year reach 90°.
How much snow does Butte get?
About 50 inches in a normal winter, most of it in March.
When is the first frost in Butte?
In half of years the first 32° night comes by October 1, and the last spring frost by May 10.
What is the rainiest month in Butte?
June, with 3.7 inches of rain and melted snow. The year totals 22 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Butte itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Wood, SD (6 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.