Deadwood, SD climate
Deadwood has cold, snowy winters and pleasant summers. A typical July afternoon reaches 82°, a January night drops to 15°, and about 184 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Deadwood feels like
Winter
Spring
Summer
Fall
Deadwood 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 | 37° | 15° | 1.3" | 24.8" | 11 | 28 | 17° – 35° |
| February | 37° | 16° | 1.5" | 26.2" | 11 | 23 | 9° – 36° |
| March | 46° | 22° | 1.9" | 27.6" | 11 | 20 | 23° – 45° |
| April | 53° | 29° | 3.2" | 29.0" | 13 | 8 | 35° – 48° |
| May | 63° | 39° | 4.8" | 6.7" | 14 | 1 | 43° – 57° |
| June | 74° | 49° | 3.7" | 0.9" | 13 | 0 | 55° – 68° |
| July | 82° | 55° | 2.8" | 0 | 12 | 0 | 61° – 74° |
| August | 81° | 54° | 2.2" | 0 | 9 | 0 | 62° – 72° |
| September | 71° | 45° | 1.8" | 1.8" | 8 | 1 | 51° – 64° |
| October | 57° | 33° | 2.7" | 19.3" | 11 | 5 | 36° – 51° |
| November | 45° | 23° | 1.3" | 22.3" | 10 | 14 | 24° – 44° |
| December | 37° | 16° | 1.3" | 25.3" | 10 | 21 | 18° – 33° |
| Year | 57° | 33° | 28.4" | 183.9" | 133 | 120 |
“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 Deadwood
Deadwood gets 28 inches of rain and melted snow a year. May is the wettest month and January the driest. Rain or snow falls on about 133 days a year. Snow covers the ground about 120 days of the year.
About 125 frost-free days a year
In half of years the last 32° night comes by May 24 and the first one by September 25. That leaves about 125 frost-free days for gardens, shorter than 96% of U.S. towns.
Heating and cooling a home in Deadwood
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Deadwood, 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.
How Deadwood 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 Deadwood averaged 1.2° warmer than the 1900s. The biggest change is in January (+3.5°). The shift is larger than in 52% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Deadwood’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 9° to 36°. August is the most reliable, staying within 11°.
Common questions about Deadwood’s climate
What is the coldest month in Deadwood?
January, with a typical high of 37° and a low of 15°.
What is the hottest month in Deadwood?
July, with a typical high of 82° and a low of 55°. About 15 days a year reach 90°.
How much snow does Deadwood get?
About 184 inches in a normal winter, most of it in April.
When is the first frost in Deadwood?
In half of years the first 32° night comes by September 25, and the last spring frost by May 24.
What is the rainiest month in Deadwood?
May, with 4.8 inches of rain and melted snow. The year totals 28 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Deadwood itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Lead, SD (2 mi, snow) and Deadwood, SD (1 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.