Redfield, South Dakota climate: Normal weather by month, frost dates and records
Redfield's normal year runs from 3°F January nights to 84°F July afternoons, with 22.8 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 6.7°C, January lows of −16°C, July highs of 29°C, 578 mm of precipitation a year.
- NOAA stationRedfield
- Station IDUSC00397052
- Location44.87°N 98.53°W
- Elevation1,309 ft (399 m)
- Population2,101
On October 22, the normal high in Redfield is 55°F and the normal low 31°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 Redfield.
- Jan 23° 3°
- Feb 28° 7°
- Mar 41° 20°
- Apr 56° 32°
- May 69° 44°
- Jun 79° 56°
- Jul 84° 60°
- Aug 82° 57°
- Sep 74° 48°
- Oct 59° 34°
- Nov 42° 21°
- Dec 28° 9°
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 Redfield each month?
July is the warmest month, with normal highs of 84°F; January the coldest, with normal lows of 3°F. The most precipitation falls in June (4.09 in), the least in January (0.49 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 23°F | 3°F | 12.9°F | 0.49 | 4 | <1 | 31 | 9 h 10 min |
| February | 28°F | 7°F | 17.3°F | 0.56 | 5 | <1 | 28 | 10 h 20 min |
| March | 41°F | 20°F | 30.6°F | 0.87 | 5 | <1 | 27 | 11 h 50 min |
| April | 56°F | 32°F | 43.9°F | 2.08 | 7 | <1 | 16 | 13 h 30 min |
| May | 69°F | 44°F | 56.5°F | 3.34 | 10 | 1 | 3 | 14 h 50 min |
| June | 79°F | 56°F | 67.1°F | 4.09 | 11 | 2 | <1 | 15 h 30 min |
| July | 84°F | 60°F | 72.2°F | 3.27 | 9 | 7 | <1 | 15 h 20 min |
| August | 82°F | 57°F | 69.9°F | 2.68 | 6 | 6 | <1 | 14 h 10 min |
| September | 74°F | 48°F | 61.0°F | 2.00 | 7 | 2 | 2 | 12 h 40 min |
| October | 59°F | 34°F | 46.2°F | 2.04 | 6 | <1 | 14 | 11 h |
| November | 42°F | 21°F | 31.3°F | 0.68 | 3 | <1 | 28 | 9 h 40 min |
| December | 28°F | 9°F | 18.6°F | 0.66 | 4 | <1 | 31 | 8 h 50 min |
| Year (annual) | 55°F | 33°F | 44.0°F | 22.76 | 76 | 17 | 179 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | −5°C | −16°C | −10.6°C | 12 mm |
| February | −2°C | −14°C | −8.2°C | 14 mm |
| March | 5°C | −7°C | −0.8°C | 22 mm |
| April | 13°C | 0°C | 6.6°C | 53 mm |
| May | 20°C | 7°C | 13.6°C | 85 mm |
| June | 26°C | 13°C | 19.5°C | 104 mm |
| July | 29°C | 16°C | 22.3°C | 83 mm |
| August | 28°C | 14°C | 21.1°C | 68 mm |
| September | 24°C | 9°C | 16.1°C | 51 mm |
| October | 15°C | 1°C | 7.9°C | 52 mm |
| November | 6°C | −6°C | −0.4°C | 17 mm |
| December | −2°C | −13°C | −7.4°C | 17 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Mellette (20 miles away), gets 43 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00397052; 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 Redfield?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, August 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 USC00397052.
When is the last frost in Redfield?
In Redfield, the last spring frost (32°F) comes after May 8 in half of years and after May 21 in one year in ten; the first autumn frost comes before October 1 in half of years and before September 19 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 21; 9 in 10 after April 25
- First autumn frost, half of years before
- October 11 year in 10 before September 19; 9 in 10 before October 13
NOAA puts the median frost-free season at 145 days, and the season without a hard freeze (28°F) at 162 days.
A hard freeze (28°F) comes after April 29 in half of springs and before October 8 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Redfield in zone 4b in ZIP code 57469, 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 USC00397052; 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 Redfield?
In a normal year in Redfield, 17 days a year reach 90°F (1 of them 100°F or more), 179 nights fall to 32°F or colder and 76 days bring measurable precipitation.
- Days at 90°F or more
- 17a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 179a normal year
- Days that stay below freezing
- 76high of 32°F or less
- Days with 0.01 inch of precipitation
- 76a normal year
The highest temperature in this station's record (since 1949) is 114°F, on August 13, 1965; the lowest is −38°F, on January 19, 1970.
The wettest calendar year on that record is 2008, with 27.75 in; the snowiest season is 1993–94, with 66.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00397052; records: ACIS (NOAA Regional Climate Centers), station USC00397052. Records use complete months only; a month missing more than three days is left out.
How sunny is Redfield?
Over a year 77% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Redfield, 4.1 kWh per square metre a day. July is the sunniest month (86%) and December the cloudiest (70%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 78% | 2.0 |
| February | 80% | 3.0 |
| March | 73% | 3.9 |
| April | 72% | 5.0 |
| May | 73% | 5.8 |
| June | 79% | 6.5 |
| July | 86% | 6.8 |
| August | 83% | 5.7 |
| September | 80% | 4.4 |
| October | 74% | 3.0 |
| November | 74% | 2.0 |
| December | 70% | 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 much heating and cooling does Redfield need?
A normal year in Redfield brings 8,245 heating degree days, 53% more than the median U.S. place (5,373), and 617 cooling degree days, 32% 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 2,534 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,616 | 0 |
| February | 1,335 | 0 |
| March | 1,067 | 0 |
| April | 634 | 1 |
| May | 287 | 24 |
| June | 56 | 119 |
| July | 12 | 235 |
| August | 28 | 178 |
| September | 178 | 60 |
| October | 584 | 2 |
| November | 1,010 | 0 |
| December | 1,438 | 0 |
| Year (annual) | 8,245 | 617 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00397052. 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 Redfield's climate compare?
Redfield is warmer than 22 of the other 99 places with their own NOAA record in South Dakota, and wetter than 51. 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, Redfield 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 Redfield share this climate record?
7 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.
- Tulare, SD204 people · 9 mi S
- Glendale Colony, SD177 people · 13 mi E
- Frankfort, SD131 people · 11 mi E
- Hitchcock, SD106 people · 17 mi S
- Ashton, SD105 people · 9 mi N
- Spink Colony, SD43 people · 14 mi SE
- Rockham, SD18 people · 15 mi W
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 Redfield's climate
What is the coldest month in Redfield?
January, with a normal high of 23°F and a normal low of 3°F. The warmest is July (84°F by day, 60°F at night).
Does it snow in Redfield?
Yes. NOAA publishes no 1991-2020 snowfall normal for Redfield's NOAA station; the nearest record that keeps one, Mellette (20 miles away), records 43 inches of snow in a normal year.
What is the rainiest month in Redfield?
June, with 4.09 in of precipitation in a normal year; the driest is January with 0.49 in.
What plant hardiness zone is Redfield in?
The USDA's 2023 map puts Redfield in zone 4b in ZIP code 57469, the nearest ZIP area.
How late can frost come in Redfield?
In half of years the last 32°F night comes after May 8; in one year in ten it comes after May 21. Waiting until May 21 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
- Mellette, SD20 miles from this station, 42.8°F a year
- Turton, SD25 miles from this station, 44.2°F a year
- Conde, SD29 miles from this station, 43.6°F a year
- Faulkton, SD32 miles from this station, 44.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made