Ladner (9 mi SW), South Dakota climate: Climate normals at a NOAA weather station
Ladner (9 mi SW)'s normal year runs from 10°F January nights to 84°F July afternoons, with 18.5 inches of precipitation and 46 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 6.6°C, January lows of −12°C, July highs of 29°C, 471 mm of precipitation a year.
- NOAA stationLadner (9 mi SW)
- Station IDUSC00394671
- Location45.77°N 103.88°W
- Elevation3,000 ft (914 m)
On October 22, the normal high in Ladner (9 mi SW) is 52°F and the normal low 30°F, and the chance of measurable rain or snow is 17%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Ladner (9 mi SW).
- Jan 28° 10°
- Feb 31° 13°
- Mar 43° 23°
- Apr 54° 31°
- May 64° 41°
- Jun 76° 51°
- Jul 84° 57°
- Aug 83° 55°
- Sep 72° 45°
- Oct 55° 33°
- Nov 41° 21°
- Dec 31° 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 at Ladner (9 mi SW) each month?
July is the warmest month, with normal highs of 84°F; January the coldest, with normal lows of 10°F. The most precipitation falls in May (2.96 in), the least in January (0.40 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 28°F | 10°F | 19.0°F | 0.40 | 4.2 | 4 | <1 | 31 | 9 h |
| February | 31°F | 13°F | 22.2°F | 0.65 | 7.4 | 5 | <1 | 27 | 10 h 20 min |
| March | 43°F | 23°F | 32.5°F | 0.95 | 8.5 | 5 | <1 | 27 | 11 h 50 min |
| April | 54°F | 31°F | 42.4°F | 2.03 | 5.4 | 8 | <1 | 20 | 13 h 30 min |
| May | 64°F | 41°F | 52.4°F | 2.96 | 2.9 | 9 | <1 | 7 | 14 h 50 min |
| June | 76°F | 51°F | 63.4°F | 2.89 | 0.0 | 9 | 2 | <1 | 15 h 40 min |
| July | 84°F | 57°F | 70.6°F | 2.60 | 0.0 | 7 | 10 | <1 | 15 h 20 min |
| August | 83°F | 55°F | 68.9°F | 1.83 | 0.0 | 6 | 8 | <1 | 14 h 10 min |
| September | 72°F | 45°F | 58.5°F | 1.42 | 0.0 | 5 | 2 | 4 | 12 h 40 min |
| October | 55°F | 33°F | 44.3°F | 1.62 | 3.3 | 6 | <1 | 19 | 11 h |
| November | 41°F | 21°F | 30.6°F | 0.73 | 5.3 | 3 | <1 | 28 | 9 h 30 min |
| December | 31°F | 13°F | 22.0°F | 0.46 | 8.7 | 5 | <1 | 31 | 8 h 40 min |
| Year (annual) | 55°F | 33°F | 43.9°F | 18.54 | 45.7 | 70 | 22 | 192 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | −2°C | −12°C | −7.2°C | 10 mm | 11 cm |
| February | 0°C | −11°C | −5.4°C | 17 mm | 19 cm |
| March | 6°C | −5°C | 0.3°C | 24 mm | 22 cm |
| April | 12°C | 0°C | 5.8°C | 52 mm | 14 cm |
| May | 18°C | 5°C | 11.3°C | 75 mm | 7 cm |
| June | 24°C | 11°C | 17.4°C | 73 mm | 0 cm |
| July | 29°C | 14°C | 21.4°C | 66 mm | 0 cm |
| August | 28°C | 13°C | 20.5°C | 46 mm | 0 cm |
| September | 22°C | 7°C | 14.7°C | 36 mm | 0 cm |
| October | 13°C | 1°C | 6.8°C | 41 mm | 8 cm |
| November | 5°C | −6°C | −0.8°C | 19 mm | 13 cm |
| December | 0°C | −11°C | −5.6°C | 12 mm | 22 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00394671; 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.
Which months are mildest at Ladner (9 mi SW)?
Normal highs sit between 65°F and 85°F in June, July, August 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 USC00394671.
When is the last frost at Ladner (9 mi SW)?
In Ladner (9 mi SW), the last spring frost (32°F) comes after May 13 in half of years and after May 25 in one year in ten; the first autumn frost comes before September 27 in half of years and before September 11 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 131 year in 10 after May 25; 9 in 10 after May 2
- First autumn frost, half of years before
- September 271 year in 10 before September 11; 9 in 10 before October 10
NOAA puts the median frost-free season at 135 days, and the season without a hard freeze (28°F) at 153 days.
A hard freeze (28°F) comes after May 4 in half of springs and before October 4 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Ladner (9 mi SW) in zone 4b in ZIP code 57724, 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 USC00394671; 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 at Ladner (9 mi SW)?
In a normal year in Ladner (9 mi SW), 22 days a year reach 90°F (3 of them 100°F or more), 192 nights fall to 32°F or colder and 70 days bring measurable precipitation.
- Days at 90°F or more
- 22a normal year
- Days at 100°F or more
- 3a normal year
- Nights at 32°F or colder
- 192a normal year
- Days that stay below freezing
- 61high of 32°F or less
- Days with 0.01 inch of precipitation
- 70a normal year
- Days with 1 inch of snow or more
- 20a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00394671.
How sunny is it at Ladner (9 mi SW)?
Over a year 79% of the sunlight that would reach the ground under clear skies gets through the clouds at Ladner (9 mi SW), 4.2 kWh per square metre a day. July is the sunniest month (87%) and April the cloudiest (73%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 77% | 1.9 |
| February | 79% | 2.9 |
| March | 74% | 3.9 |
| April | 73% | 5.0 |
| May | 74% | 6.0 |
| June | 80% | 6.8 |
| July | 87% | 7.0 |
| August | 86% | 6.0 |
| September | 82% | 4.5 |
| October | 75% | 3.0 |
| November | 75% | 2.0 |
| December | 73% | 1.5 |
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 many heating and cooling degree days does Ladner (9 mi SW) record?
A normal year at Ladner (9 mi SW) brings 8,118 heating degree days, 51% more than the median U.S. place (5,373), and 464 cooling degree days, 49% 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 2,168 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,426 | 0 |
| February | 1,198 | 0 |
| March | 1,008 | 0 |
| April | 678 | 0 |
| May | 399 | 8 |
| June | 108 | 60 |
| July | 22 | 194 |
| August | 44 | 164 |
| September | 229 | 35 |
| October | 644 | 2 |
| November | 1,032 | 0 |
| December | 1,331 | 0 |
| Year (annual) | 8,118 | 464 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00394671. 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.
Have recent years at Ladner (9 mi SW) been warmer than normal?
2025 averaged 46.2°F, 2.3°F above the 1991-2020 normal of 43.9°F. 2 of the 3 complete years since 2022 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2022 | 42.7°F | −1.2°F | 14.83 | 53.7 |
| 2023 | 45.6°F | +1.7°F | 16.05 | 25.0 |
| 2025 | 46.2°F | +2.3°F | – | – |
Source: observed years: ACIS, station USC00394671. A year counts only with all twelve months complete.
How does Ladner (9 mi SW)'s climate compare?
Ladner (9 mi SW) is warmer than 21 of the 100 places with their own NOAA record in South Dakota, and wetter than 18. Across the 7,247 U.S. stations with normals, its annual mean of 43.9°F is warmer than 15%.
In the Köppen classification computed from these normals, Ladner (9 mi SW) is Dfb: continental, no dry season, warm 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.
Questions about Ladner (9 mi SW)'s climate
What is the coldest month at Ladner (9 mi SW)?
January, with a normal high of 28°F and a normal low of 10°F. The warmest is July (84°F by day, 57°F at night).
Does it snow at Ladner (9 mi SW)?
Yes: 46 inches in a normal year, falling on 21 days with 0.1 inch or more, the most in December (8.7 inches).
What is the rainiest month at Ladner (9 mi SW)?
May, with 2.96 in of precipitation in a normal year; the driest is January with 0.40 in.
What plant hardiness zone is Ladner (9 mi SW) in?
The USDA's 2023 map puts Ladner (9 mi SW) in zone 4b in ZIP code 57724, the nearest ZIP area.
How late can frost come at Ladner (9 mi SW)?
In half of years the last 32°F night comes after May 13; in one year in ten it comes after May 25. Waiting until May 25 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
- Camp Crook, SD16 miles from this station, 46.4°F a year
- Buffalo, SD20 miles from this station, 45.5°F a year
- Ludlow (3 mi SSE), SD24 miles from this station, 44.0°F a year
- Antelope Ranger Station, SD31 miles from this station, 43.4°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made