Deadwood, South Dakota climate: Normal weather by month, frost dates and records
Deadwood's normal year runs from 14°F January nights to 83°F July afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.4°C, January lows of −10°C, July highs of 28°C.
- NOAA stationDeadwood
- Station IDUSC00392207
- Location44.37°N 103.73°W
- Elevation4,670 ft (1,423 m)
- Population1,347
On October 23, the normal high in Deadwood is 55°F and the normal low 29°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Deadwood.
- Jan 38° 14°
- Feb 39° 14°
- Mar 48° 22°
- Apr 55° 30°
- May 65° 39°
- Jun 75° 49°
- Jul 83° 56°
- Aug 82° 54°
- Sep 73° 44°
- Oct 58° 31°
- Nov 47° 22°
- Dec 38° 15°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Deadwood each month?
July is the warmest month, with normal highs of 83°F; January the coldest, with normal lows of 14°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 38°F | 14°F | 26.2°F | – | <1 | 31 | 9 h 10 min |
| February | 39°F | 14°F | 26.5°F | – | <1 | 27 | 10 h 30 min |
| March | 48°F | 22°F | 35.0°F | – | <1 | 28 | 11 h 50 min |
| April | 55°F | 30°F | 42.3°F | – | <1 | 19 | 13 h 20 min |
| May | 65°F | 39°F | 51.7°F | – | <1 | 9 | 14 h 40 min |
| June | 75°F | 49°F | 62.2°F | – | 1 | <1 | 15 h 30 min |
| July | 83°F | 56°F | 69.4°F | – | 7 | <1 | 15 h 10 min |
| August | 82°F | 54°F | 67.7°F | – | 5 | <1 | 14 h 10 min |
| September | 73°F | 44°F | 58.5°F | – | 2 | 4 | 12 h 40 min |
| October | 58°F | 31°F | 44.8°F | – | <1 | 16 | 11 h |
| November | 47°F | 22°F | 34.5°F | – | <1 | 27 | 9 h 40 min |
| December | 38°F | 15°F | 26.2°F | – | <1 | 31 | 8 h 50 min |
| Year (annual) | 58°F | 33°F | 45.4°F | – | 15 | 192 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | 3°C | −10°C | −3.2°C |
| February | 4°C | −10°C | −3.1°C |
| March | 9°C | −6°C | 1.7°C |
| April | 13°C | −1°C | 5.7°C |
| May | 18°C | 4°C | 10.9°C |
| June | 24°C | 10°C | 16.8°C |
| July | 28°C | 13°C | 20.8°C |
| August | 28°C | 12°C | 19.8°C |
| September | 23°C | 7°C | 14.7°C |
| October | 15°C | 0°C | 7.1°C |
| November | 8°C | −6°C | 1.4°C |
| December | 3°C | −10°C | −3.2°C |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Lead (1 miles away), gets 184 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00392207; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Deadwood?
Normal highs sit between 65°F and 85°F in June, July, August and September.
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00392207.
When is the last frost in Deadwood?
In Deadwood, the last spring frost (32°F) comes after May 24 in half of years and after June 6 in one year in ten; the first autumn frost comes before September 25 in half of years and before September 9 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- May 241 year in 10 after June 6; 9 in 10 after May 7
- First autumn frost, half of years before
- September 251 year in 10 before September 9; 9 in 10 before October 9
NOAA puts the median frost-free season at 125 days, and the season without a hard freeze (28°F) at 143 days.
A hard freeze (28°F) comes after May 14 in half of springs and before October 3 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Deadwood in zone 5a in ZIP code 57732, the nearest ZIP area.
Frost dates for every NOAA station in South Dakota · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00392207; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Deadwood?
In a normal year in Deadwood, 15 days a year reach 90°F and 192 nights fall to 32°F or colder.
- Days at 90°F or more
- 15a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 192a normal year
- Days that stay below freezing
- 39high of 32°F or less
The highest temperature in this station's record (since 1909) is 103°F, on July 25, 1952; the lowest is −30°F, on January 31, 1918.
The wettest calendar year on that record is 1922, with 45.43 in; the snowiest season is 1952–53, with 220.1 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00392207; records: ACIS (NOAA Regional Climate Centers), station USC00392207. Records use complete months only; a month missing more than three days is left out.
How sunny is Deadwood?
Over a year 78% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Deadwood, 4.3 kWh per square metre a day. July is the sunniest month (86%) and April the cloudiest (71%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 75% | 1.9 |
| February | 76% | 2.9 |
| March | 74% | 4.0 |
| April | 71% | 5.0 |
| May | 72% | 5.9 |
| June | 80% | 6.8 |
| July | 86% | 7.0 |
| August | 86% | 6.0 |
| September | 82% | 4.7 |
| October | 75% | 3.1 |
| November | 75% | 2.1 |
| December | 72% | 1.6 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Deadwood need?
A normal year in Deadwood brings 7,495 heating degree days, 39% more than the median U.S. place (5,373), and 388 cooling degree days, 57% fewer than the median (908). Eight months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,035 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,203 | 0 |
| February | 1,078 | 0 |
| March | 932 | 0 |
| April | 681 | 0 |
| May | 415 | 4 |
| June | 138 | 54 |
| July | 33 | 167 |
| August | 45 | 128 |
| September | 229 | 34 |
| October | 625 | 0 |
| November | 915 | 0 |
| December | 1,203 | 0 |
| Year (annual) | 7,495 | 388 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00392207. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
How does Deadwood's climate compare?
Deadwood is warmer than 43 of the other 99 places with their own NOAA record in South Dakota. Across the 7,247 U.S. stations with normals, its annual mean of 45.4°F is warmer than 21%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Which places near Deadwood share this climate record?
2 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Whitewood, SD965 people · 8 mi NE
- Crook City, SD278 people · 6 mi NE
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Deadwood's climate
What is the coldest month in Deadwood?
January, with a normal high of 38°F and a normal low of 14°F. The warmest is July (83°F by day, 56°F at night).
Does it snow in Deadwood?
Yes. NOAA publishes no 1991-2020 snowfall normal for Deadwood's NOAA station; the nearest record that keeps one, Lead (1 miles away), records 184 inches of snow in a normal year.
What plant hardiness zone is Deadwood in?
The USDA's 2023 map puts Deadwood in zone 5a in ZIP code 57732, the nearest ZIP area.
How late can frost come in Deadwood?
In half of years the last 32°F night comes after May 24; in one year in ten it comes after June 6. Waiting until June 6 leaves about a one-in-ten chance of a later frost.
Nearby and next
- South Dakota climateThe statewide normals and every place in the state
- Lead, SD1 miles from this station, 46.3°F a year
- Spearfish, SD11 miles from this station, 46.5°F a year
- Fort Meade, SD13 miles from this station, 48.2°F a year
- Rochford (2 mi WNW), SD17 miles from this station, 38.8°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made