Dupree, South Dakota climate: Normal weather by month, frost dates and records
Dupree's normal year runs from 10°F January nights to 90°F July afternoons, with 18.9 inches of precipitation and 41 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.8°C, January lows of −12°C, July highs of 32°C, 479 mm of precipitation a year.
- NOAA stationDupree
- Station IDUSC00392429
- Location45.05°N 101.60°W
- Elevation2,388 ft (728 m)
- Population496
On October 23, the normal high in Dupree is 58°F and the normal low 32°F, and the chance of measurable rain or snow is 16%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Dupree.
- Jan 31° 10°
- Feb 35° 13°
- Mar 48° 23°
- Apr 61° 33°
- May 72° 44°
- Jun 82° 54°
- Jul 90° 60°
- Aug 90° 58°
- Sep 80° 49°
- Oct 63° 36°
- Nov 46° 23°
- Dec 34° 13°
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 Dupree each month?
July is the warmest month, with normal highs of 90°F; January the coldest, with normal lows of 10°F. The most precipitation falls in June (3.72 in), the least in January (0.41 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 31°F | 10°F | 20.6°F | 0.41 | 5.4 | 4 | <1 | 30 | 9 h 10 min |
| February | 35°F | 13°F | 24.1°F | 0.59 | 8.2 | 4 | <1 | 27 | 10 h 20 min |
| March | 48°F | 23°F | 35.2°F | 0.85 | 6.0 | 4 | <1 | 26 | 11 h 50 min |
| April | 61°F | 33°F | 46.8°F | 1.98 | 6.8 | 7 | <1 | 15 | 13 h 30 min |
| May | 72°F | 44°F | 57.9°F | 3.27 | 0.5 | 9 | 1 | 4 | 14 h 50 min |
| June | 82°F | 54°F | 68.3°F | 3.72 | 0.0 | 10 | 4 | <1 | 15 h 40 min |
| July | 90°F | 60°F | 75.2°F | 2.49 | 0.0 | 8 | 13 | <1 | 15 h 20 min |
| August | 90°F | 58°F | 73.9°F | 1.79 | 0.0 | 6 | 13 | <1 | 14 h 10 min |
| September | 80°F | 49°F | 64.4°F | 1.22 | 0.0 | 5 | 5 | 1 | 12 h 40 min |
| October | 63°F | 36°F | 49.1°F | 1.60 | 2.3 | 5 | <1 | 12 | 11 h |
| November | 46°F | 23°F | 34.6°F | 0.43 | 3.4 | 4 | <1 | 26 | 9 h 40 min |
| December | 34°F | 13°F | 23.7°F | 0.50 | 8.1 | 4 | <1 | 30 | 8 h 50 min |
| Year (annual) | 61°F | 35°F | 47.8°F | 18.85 | 40.7 | 69 | 36 | 171 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 0°C | −12°C | −6.3°C | 10 mm | 14 cm |
| February | 2°C | −10°C | −4.4°C | 15 mm | 21 cm |
| March | 9°C | −5°C | 1.8°C | 22 mm | 15 cm |
| April | 16°C | 0°C | 8.2°C | 50 mm | 17 cm |
| May | 22°C | 7°C | 14.4°C | 83 mm | 1 cm |
| June | 28°C | 12°C | 20.2°C | 94 mm | 0 cm |
| July | 32°C | 16°C | 24.0°C | 63 mm | 0 cm |
| August | 32°C | 15°C | 23.3°C | 45 mm | 0 cm |
| September | 27°C | 9°C | 18.0°C | 31 mm | 0 cm |
| October | 17°C | 2°C | 9.5°C | 41 mm | 6 cm |
| November | 8°C | −5°C | 1.4°C | 11 mm | 9 cm |
| December | 1°C | −10°C | −4.6°C | 13 mm | 21 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00392429; 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 Dupree?
Normal highs sit between 65°F and 85°F in May, June and September. Of those, September has the fewest days with rain (5).
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 USC00392429.
When is the last frost in Dupree?
In Dupree, the last spring frost (32°F) comes after May 8 in half of years and after May 22 in one year in ten; the first autumn frost comes before October 1 in half of years and before September 17 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 81 year in 10 after May 22; 9 in 10 after April 26
- First autumn frost, half of years before
- October 11 year in 10 before September 17; 9 in 10 before October 15
NOAA puts the median frost-free season at 144 days, and the season without a hard freeze (28°F) at 161 days.
A hard freeze (28°F) comes after April 29 in half of springs and before October 9 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Dupree in zone 4b in ZIP code 57623, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Dupree's NOAA station is in zone 4b: the coldest night of a typical year reaches −22°F (27 complete years).
Frost dates for every NOAA station in South Dakota · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00392429; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. 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 Dupree?
In a normal year in Dupree, 36 days a year reach 90°F (6 of them 100°F or more), 171 nights fall to 32°F or colder and 69 days bring measurable precipitation.
- Days at 90°F or more
- 36a normal year
- Days at 100°F or more
- 6a normal year
- Nights at 32°F or colder
- 171a normal year
- Days that stay below freezing
- 57high of 32°F or less
- Days with 0.01 inch of precipitation
- 69a normal year
- Days with 1 inch of snow or more
- 15a normal year
The highest temperature in this station's record (since 1922) is 114°F, on July 6, 1936; the lowest is −39°F, on January 29, 1966.
The wettest calendar year on that record is 2019, with 29.39 in; the snowiest season is 2018–19, with 86.4 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00392429; records: ACIS (NOAA Regional Climate Centers), station USC00392429. Records use complete months only; a month missing more than three days is left out.
How sunny is Dupree?
Over a year 78% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Dupree, 4.1 kWh per square metre a day. July is the sunniest month (86%) and December the cloudiest (69%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 75% | 1.8 |
| February | 79% | 2.9 |
| March | 73% | 3.8 |
| April | 72% | 5.0 |
| May | 74% | 5.9 |
| June | 80% | 6.7 |
| July | 86% | 6.9 |
| August | 84% | 5.8 |
| September | 81% | 4.4 |
| October | 73% | 2.9 |
| November | 73% | 1.9 |
| December | 69% | 1.4 |
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 Dupree need?
A normal year in Dupree brings 7,122 heating degree days, 33% more than the median U.S. place (5,373), and 900 cooling degree days, 1% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 3,011 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,376 | 0 |
| February | 1,145 | 0 |
| March | 924 | 0 |
| April | 549 | 3 |
| May | 255 | 33 |
| June | 46 | 144 |
| July | 7 | 323 |
| August | 12 | 288 |
| September | 121 | 102 |
| October | 500 | 7 |
| November | 910 | 0 |
| December | 1,279 | 0 |
| Year (annual) | 7,122 | 900 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00392429. 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.
Has Dupree been warmer than normal lately?
2024 averaged 50.0°F, 2.2°F above the 1991-2020 normal of 47.8°F. 3 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 50.1°F | +2.3°F | 13.52 | 10.7 |
| 2022 | 47.6°F | −0.2°F | 13.20 | 32.2 |
| 2023 | 48.6°F | +0.8°F | 20.32 | 45.7 |
| 2024 | 50.0°F | +2.2°F | 15.67 | 28.5 |
Over 82 complete years from 1923 to 2024, the station's annual mean temperature rose at a fitted 1.0°F per century (+0.05°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00392429; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Dupree's climate compare?
Dupree is warmer than 84 of the other 99 places with their own NOAA record in South Dakota, and wetter than 19. Across the 7,247 U.S. stations with normals, its annual mean of 47.8°F is warmer than 31%.
In the Köppen classification computed from these normals, Dupree is Dfa: continental, no dry season, hot summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Dupree share this climate record?
4 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.
- North Eagle Butte, SD1,432 people · 18 mi E
- Eagle Butte, SD1,270 people · 18 mi E
- Green Grass, SD80 people · 17 mi NE
- Lantry, SD3 people · 9 mi E
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
What do Dupree's other NOAA stations record?
One more NOAA station keeps 1991-2020 normals in or near Dupree. This page uses Dupree; the other differs by site and elevation:
| Station | From this station | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Dupree (15 mi SSE) USC00392446 | 14 mi SE | 2,100 ft | 45.8°F | 9°F | 86°F | 19.3 | 47 | May 6 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Dupree's climate
What is the coldest month in Dupree?
January, with a normal high of 31°F and a normal low of 10°F. The warmest is July (90°F by day, 60°F at night).
Does it snow in Dupree?
Yes: 41 inches in a normal year, falling on 17 days with 0.1 inch or more, the most in February (8.2 inches).
What is the rainiest month in Dupree?
June, with 3.72 in of precipitation in a normal year; the driest is January with 0.41 in.
What plant hardiness zone is Dupree in?
The USDA's 2023 map puts Dupree in zone 4b in ZIP code 57623, the nearest ZIP area. By the same method at Dupree's NOAA station, the coldest night of a typical year reaches −22°F (27 years, 1991-2020): zone 4b.
How late can frost come in Dupree?
In half of years the last 32°F night comes after May 8; in one year in ten it comes after May 22. Waiting until May 22 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
- Faith, SD21 miles from this station, 45.8°F a year
- Glad Valley (2 mi W), SD27 miles from this station, 44.0°F a year
- Kirley (6 mi N), SD33 miles from this station, 46.9°F a year
- Milesville (5 mi NE), SD37 miles from this station, 47.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made