Menno, South Dakota climate: Normal weather by month, frost dates and records
Menno's normal year runs from 10°F January nights to 86°F July afternoons, with 25.0 inches of precipitation and 39 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 9.0°C, January lows of −12°C, July highs of 30°C, 636 mm of precipitation a year.
- NOAA stationMenno
- Station IDUSC00395481
- Location43.24°N 97.57°W
- Elevation1,332 ft (406 m)
- Population618
On October 23, the normal high in Menno is 59°F and the normal low 36°F, and the chance of measurable rain or snow is 18%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Menno.
- Jan 28° 10°
- Feb 34° 14°
- Mar 47° 25°
- Apr 61° 36°
- May 73° 48°
- Jun 82° 59°
- Jul 86° 63°
- Aug 83° 61°
- Sep 77° 52°
- Oct 63° 39°
- Nov 45° 25°
- Dec 32° 14°
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 Menno each month?
July is the warmest month, with normal highs of 86°F; January the coldest, with normal lows of 10°F. The most precipitation falls in June (3.64 in), the least in January (0.53 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 28°F | 10°F | 19.2°F | 0.53 | 7.1 | 5 | <1 | 31 | 9 h 20 min |
| February | 34°F | 14°F | 23.7°F | 0.66 | 7.4 | 5 | <1 | 27 | 10 h 30 min |
| March | 47°F | 25°F | 36.0°F | 1.27 | 6.0 | 6 | <1 | 23 | 11 h 50 min |
| April | 61°F | 36°F | 48.5°F | 2.72 | 4.0 | 8 | <1 | 11 | 13 h 20 min |
| May | 73°F | 48°F | 60.4°F | 3.41 | 0.3 | 11 | 2 | 1 | 14 h 40 min |
| June | 82°F | 59°F | 70.7°F | 3.64 | 0.0 | 10 | 7 | <1 | 15 h 20 min |
| July | 86°F | 63°F | 74.4°F | 2.79 | 0.0 | 7 | 9 | <1 | 15 h 10 min |
| August | 83°F | 61°F | 71.8°F | 3.28 | 0.0 | 8 | 5 | <1 | 14 h |
| September | 77°F | 52°F | 64.6°F | 2.86 | 0.0 | 6 | 3 | 1 | 12 h 30 min |
| October | 63°F | 39°F | 50.7°F | 2.06 | 1.2 | 7 | <1 | 8 | 11 h 10 min |
| November | 45°F | 25°F | 35.2°F | 0.99 | 5.4 | 5 | <1 | 23 | 9 h 50 min |
| December | 32°F | 14°F | 22.9°F | 0.82 | 7.8 | 5 | <1 | 30 | 9 h |
| Year (annual) | 59°F | 37°F | 48.2°F | 25.03 | 39.2 | 82 | 27 | 155 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | −2°C | −12°C | −7.1°C | 13 mm | 18 cm |
| February | 1°C | −10°C | −4.6°C | 17 mm | 19 cm |
| March | 8°C | −4°C | 2.2°C | 32 mm | 15 cm |
| April | 16°C | 2°C | 9.2°C | 69 mm | 10 cm |
| May | 23°C | 9°C | 15.8°C | 87 mm | 1 cm |
| June | 28°C | 15°C | 21.5°C | 92 mm | 0 cm |
| July | 30°C | 17°C | 23.6°C | 71 mm | 0 cm |
| August | 28°C | 16°C | 22.1°C | 83 mm | 0 cm |
| September | 25°C | 11°C | 18.1°C | 73 mm | 0 cm |
| October | 17°C | 4°C | 10.4°C | 52 mm | 3 cm |
| November | 7°C | −4°C | 1.8°C | 25 mm | 14 cm |
| December | 0°C | −10°C | −5.1°C | 21 mm | 20 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00395481; 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 Menno?
Normal highs sit between 65°F and 85°F in May, June, 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 USC00395481.
When is the last frost in Menno?
In Menno, the last spring frost (32°F) comes after May 1 in half of years and after May 14 in one year in ten; the first autumn frost comes before October 4 in half of years and before September 21 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 11 year in 10 after May 14; 9 in 10 after April 17
- First autumn frost, half of years before
- October 41 year in 10 before September 21; 9 in 10 before October 17
NOAA puts the median frost-free season at 156 days, and the season without a hard freeze (28°F) at 175 days.
A hard freeze (28°F) comes after April 22 in half of springs and before October 13 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Menno in zone 5a in ZIP code 57045, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Menno's NOAA station is in zone 4b: the coldest night of a typical year reaches −21°F (30 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in South Dakota · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00395481; 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 Menno?
In a normal year in Menno, 27 days a year reach 90°F (2 of them 100°F or more), 155 nights fall to 32°F or colder and 82 days bring measurable precipitation.
- Days at 90°F or more
- 27a normal year
- Days at 100°F or more
- 2a normal year
- Nights at 32°F or colder
- 155a normal year
- Days that stay below freezing
- 55high of 32°F or less
- Days with 0.01 inch of precipitation
- 82a normal year
- Days with 1 inch of snow or more
- 13a normal year
The highest temperature in this station's record (since 1896) is 117°F, on July 17, 1936; the lowest is −42°F, on February 2, 1905.
The wettest calendar year on that record is 1944, with 39.62 in; the snowiest season is 1959–60, with 68.2 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00395481; records: ACIS (NOAA Regional Climate Centers), station USC00395481. Records use complete months only; a month missing more than three days is left out.
How sunny is Menno?
Over a year 77% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Menno, 4.2 kWh per square metre a day. July is the sunniest month (86%) and December the cloudiest (71%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 76% | 2.0 |
| February | 79% | 3.1 |
| March | 71% | 3.9 |
| April | 72% | 5.0 |
| May | 72% | 5.8 |
| June | 79% | 6.5 |
| July | 86% | 6.8 |
| August | 82% | 5.6 |
| September | 80% | 4.5 |
| October | 74% | 3.1 |
| November | 75% | 2.1 |
| December | 71% | 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 Menno need?
A normal year in Menno brings 6,980 heating degree days, 30% more than the median U.S. place (5,373), and 892 cooling degree days, 2% 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 3,118 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,421 | 0 |
| February | 1,155 | 0 |
| March | 898 | 1 |
| April | 501 | 6 |
| May | 199 | 57 |
| June | 27 | 198 |
| July | 5 | 298 |
| August | 12 | 225 |
| September | 111 | 97 |
| October | 452 | 10 |
| November | 894 | 0 |
| December | 1,303 | 0 |
| Year (annual) | 6,980 | 892 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00395481. 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 Menno been warmer than normal lately?
2025 averaged 50.7°F, 2.5°F above the 1991-2020 normal of 48.2°F. 5 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 51.1°F | +2.9°F | 20.19 | 22.2 |
| 2022 | 48.9°F | +0.6°F | 15.75 | 21.2 |
| 2023 | 49.6°F | +1.4°F | 24.03 | 50.3 |
| 2024 | 51.2°F | +3.0°F | 28.18 | 29.1 |
| 2025 | 50.7°F | +2.5°F | 25.02 | 29.8 |
Over 88 complete years from 1897 to 2025, the station's annual mean temperature rose at a fitted 2.8°F per century (+0.16°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00395481; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Menno's climate compare?
Menno is warmer than 89 of the other 99 places with their own NOAA record in South Dakota, and wetter than 66. Across the 7,247 U.S. stations with normals, its annual mean of 48.2°F is warmer than 33%.
In the Köppen classification computed from these normals, Menno 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 Menno share this climate record?
8 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.
- Freeman, SD1,308 people · 10 mi NE
- Scotland, SD786 people · 10 mi SW
- Tschetter Colony, SD96 people · 11 mi NW
- Jamesville Colony, SD66 people · 10 mi SE
- Olivet, SD63 people · 5 mi W
- Cameron Colony, SD58 people · 16 mi E
- Maxwell Colony, SD0 people · 5 mi SW
- Wolf Creek Colony, SD0 people · 8 mi N
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 Menno's climate
What is the coldest month in Menno?
January, with a normal high of 28°F and a normal low of 10°F. The warmest is July (86°F by day, 63°F at night).
Does it snow in Menno?
Yes: 39 inches in a normal year, falling on 24 days with 0.1 inch or more, the most in December (7.8 inches).
What is the rainiest month in Menno?
June, with 3.64 in of precipitation in a normal year; the driest is January with 0.53 in.
What plant hardiness zone is Menno in?
The USDA's 2023 map puts Menno in zone 5a in ZIP code 57045, the nearest ZIP area. By the same method at Menno's NOAA station, the coldest night of a typical year reaches −21°F (30 years, 1991-2020): zone 4b.
How late can frost come in Menno?
In half of years the last 32°F night comes after May 1; in one year in ten it comes after May 14. Waiting until May 14 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
- Bridgewater, SD22 miles from this station, 46.4°F a year
- Tyndall, SD22 miles from this station, 47.3°F a year
- Yankton, SD27 miles from this station, 48.7°F a year
- Alexandria, SD31 miles from this station, 45.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made