Glad Valley (2 mi W), South Dakota climate: Climate normals at a NOAA weather station
Glad Valley (2 mi W)'s normal year runs from 7°F January nights to 84°F July afternoons, with 19.4 inches of precipitation and 47 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 6.7°C, January lows of −14°C, July highs of 29°C, 493 mm of precipitation a year.
- NOAA stationGlad Valley (2 mi W)
- Station IDUSC00393316
- Location45.40°N 101.81°W
- Elevation2,487 ft (758 m)
On October 22, the normal high in Glad Valley (2 mi W) is 54°F and the normal low 30°F, and the chance of measurable rain or snow is 20%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Glad Valley (2 mi W).
- Jan 27° 7°
- Feb 30° 10°
- Mar 42° 20°
- Apr 55° 31°
- May 66° 43°
- Jun 76° 53°
- Jul 84° 59°
- Aug 84° 56°
- Sep 74° 46°
- Oct 58° 33°
- Nov 43° 20°
- Dec 31° 10°
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 Glad Valley (2 mi W) each month?
July is the warmest month, with normal highs of 84°F; January the coldest, with normal lows of 7°F. The most precipitation falls in June (3.56 in), the least in January (0.40 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 27°F | 7°F | 17.2°F | 0.40 | 5.3 | 5 | <1 | 31 | 9 h |
| February | 30°F | 10°F | 20.1°F | 0.64 | 7.6 | 5 | <1 | 27 | 10 h 20 min |
| March | 42°F | 20°F | 31.0°F | 0.82 | 8.8 | 6 | <1 | 28 | 11 h 50 min |
| April | 55°F | 31°F | 42.7°F | 1.99 | 7.5 | 8 | <1 | 17 | 13 h 30 min |
| May | 66°F | 43°F | 54.3°F | 2.94 | 0.7 | 11 | 1 | 3 | 14 h 50 min |
| June | 76°F | 53°F | 64.5°F | 3.56 | 0.0 | 11 | 2 | <1 | 15 h 40 min |
| July | 84°F | 59°F | 71.3°F | 2.66 | 0.0 | 8 | 8 | <1 | 15 h 20 min |
| August | 84°F | 56°F | 70.0°F | 2.00 | 0.0 | 6 | 9 | <1 | 14 h 10 min |
| September | 74°F | 46°F | 60.2°F | 1.62 | 0.3 | 6 | 3 | 1 | 12 h 40 min |
| October | 58°F | 33°F | 45.1°F | 1.71 | 3.8 | 7 | <1 | 15 | 11 h |
| November | 43°F | 20°F | 31.4°F | 0.56 | 4.8 | 4 | <1 | 27 | 9 h 30 min |
| December | 31°F | 10°F | 20.6°F | 0.51 | 7.7 | 4 | <1 | 31 | 8 h 50 min |
| Year (annual) | 56°F | 32°F | 44.0°F | 19.41 | 46.5 | 82 | 21 | 181 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | −3°C | −14°C | −8.2°C | 10 mm | 13 cm |
| February | −1°C | −12°C | −6.6°C | 16 mm | 19 cm |
| March | 6°C | −7°C | −0.6°C | 21 mm | 22 cm |
| April | 13°C | −1°C | 5.9°C | 51 mm | 19 cm |
| May | 19°C | 6°C | 12.4°C | 75 mm | 2 cm |
| June | 25°C | 12°C | 18.1°C | 90 mm | 0 cm |
| July | 29°C | 15°C | 21.8°C | 68 mm | 0 cm |
| August | 29°C | 14°C | 21.1°C | 51 mm | 0 cm |
| September | 23°C | 8°C | 15.7°C | 41 mm | 1 cm |
| October | 14°C | 0°C | 7.3°C | 43 mm | 10 cm |
| November | 6°C | −7°C | −0.3°C | 14 mm | 12 cm |
| December | −1°C | −12°C | −6.3°C | 13 mm | 20 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00393316; 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 Glad Valley (2 mi W)?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, September has the fewest days with rain (6).
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 USC00393316.
When is the last frost at Glad Valley (2 mi W)?
In Glad Valley (2 mi W), the last spring frost (32°F) comes after May 11 in half of years and after May 24 in one year in ten; the first autumn frost comes before September 30 in half of years and before September 16 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 111 year in 10 after May 24; 9 in 10 after April 30
- First autumn frost, half of years before
- September 301 year in 10 before September 16; 9 in 10 before October 13
NOAA puts the median frost-free season at 140 days, and the season without a hard freeze (28°F) at 157 days.
A hard freeze (28°F) comes after May 2 in half of springs and before October 7 in half of autumns.
By the USDA's method, the average of each year's coldest night over 1991-2020, the station is in plant hardiness zone 4b: the coldest night of a typical year reaches −22°F (25 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 USC00393316; 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 at Glad Valley (2 mi W)?
In a normal year in Glad Valley (2 mi W), 21 days a year reach 90°F (3 of them 100°F or more), 181 nights fall to 32°F or colder and 82 days bring measurable precipitation.
- Days at 90°F or more
- 21a normal year
- Days at 100°F or more
- 3a normal year
- Nights at 32°F or colder
- 181a normal year
- Days that stay below freezing
- 68high of 32°F or less
- Days with 0.01 inch of precipitation
- 82a normal year
- Days with 1 inch of snow or more
- 19a normal year
The highest temperature in this station's record (since 1958) is 110°F, on June 30, 2002; the lowest is −38°F, on February 8, 1994.
The wettest calendar year on that record is 2019, with 31.12 in; the snowiest season is 2018–19, with 82.8 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00393316; records: ACIS (NOAA Regional Climate Centers), station USC00393316. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Glad Valley (2 mi W)?
Over a year 78% of the sunlight that would reach the ground under clear skies gets through the clouds at Glad Valley (2 mi W), 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 many heating and cooling degree days does Glad Valley (2 mi W) record?
A normal year at Glad Valley (2 mi W) brings 8,161 heating degree days, 52% more than the median U.S. place (5,373), and 555 cooling degree days, 39% 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 2,370 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,482 | 0 |
| February | 1,256 | 0 |
| March | 1,054 | 0 |
| April | 671 | 1 |
| May | 348 | 15 |
| June | 93 | 78 |
| July | 19 | 216 |
| August | 34 | 190 |
| September | 198 | 52 |
| October | 620 | 3 |
| November | 1,008 | 0 |
| December | 1,378 | 0 |
| Year (annual) | 8,161 | 555 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00393316. 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 Glad Valley (2 mi W) been warmer than normal?
2025 averaged 45.1°F, 1.1°F above the 1991-2020 normal of 44.0°F. 4 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 46.8°F | +2.8°F | 16.66 | 14.0 |
| 2022 | 43.6°F | −0.4°F | 14.72 | 45.5 |
| 2023 | 45.7°F | +1.7°F | 20.11 | 43.5 |
| 2024 | 46.9°F | +2.9°F | 16.63 | 24.0 |
| 2025 | 45.1°F | +1.1°F | 29.98 | 35.8 |
Over 33 complete years from 1967 to 2025, the station's annual mean temperature rose at a fitted 4.3°F per century (+0.24°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00393316; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Glad Valley (2 mi W)'s climate compare?
Glad Valley (2 mi W) is warmer than 22 of the 100 places with their own NOAA record in South Dakota, and wetter than 21. Across the 7,247 U.S. stations with normals, its annual mean of 44.0°F is warmer than 15%.
In the Köppen classification computed from these normals, Glad Valley (2 mi W) 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 Glad Valley (2 mi W)'s climate
What is the coldest month at Glad Valley (2 mi W)?
January, with a normal high of 27°F and a normal low of 7°F. The warmest is July (84°F by day, 59°F at night).
Does it snow at Glad Valley (2 mi W)?
Yes: 47 inches in a normal year, falling on 24 days with 0.1 inch or more, the most in March (8.8 inches).
What is the rainiest month at Glad Valley (2 mi W)?
June, with 3.56 in of precipitation in a normal year; the driest is January with 0.40 in.
What plant hardiness zone is Glad Valley (2 mi W) in?
By the same method at the station, the coldest night of a typical year reaches −22°F (25 years, 1991-2020): zone 4b.
How late can frost come at Glad Valley (2 mi W)?
In half of years the last 32°F night comes after May 11; in one year in ten it comes after May 24. Waiting until May 24 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
- Dupree, SD27 miles from this station, 47.8°F a year
- Faith, SD27 miles from this station, 45.8°F a year
- Shadehill Reservoir, SD30 miles from this station, 44.1°F a year
- Bison, SD33 miles from this station, 45.7°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made