Hardly any U.S. towns see harsher January nights than Rosette Township
The warmest part of a July day comes in at 83° on average. Precipitation is light here, less than falls on 89% of U.S. towns. Since 1901–2000, the year has warmed by 0.6°, most of all in January. Garden planting can start around May 8; autumn frost returns near September 29.
A year in Rosette Township at a glance
Each month’s typical high and low, and what it brings.
What stands out about Rosette Township’s climate
Compared with towns across the U.S., with Rosette Township’s place in South Dakota beside it.
What a year in Rosette Township feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 143 frost-free days a year
In half of years the last 32° night comes by May 8 and the first by September 29. Frost and day counts come from NOAA’s station at Ipswich, SD, 7 miles from the town’s center, at about the same height.
The 2023 USDA map puts Rosette Township’s center in zone 4b: the coldest night of a typical winter, averaged over 1991–2020, reaches about −24°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 34 inches of snow a winter
Snow, measured at Ipswich, SD, falls mostly in February. Precipitation (rain plus melted snow) adds up to 21 inches a year; June is the wettest month and January the driest. Rain or snow falls on about 64 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Rosette Township
94% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October through April.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Ipswich, SD.
Living with Rosette Township’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
143 frost-free days in zone 4b. The last frost comes by May 8 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Sep 29.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August and September. 9.5 miles of trails are waiting.
Parks & trails →Cold waves are 35% of the yearly building losses FEMA expects in Rosette Township from natural hazards, the largest share. Normals are averages; the hazards page covers the extremes.
Natural hazards →Rosette Township and its neighbors
Every town next door is within a degree of Rosette Township in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Rosette Township’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Rosette Township, SD | 3° | 83° | 21" | 34" |
| Dickinson, ND | 5° | 83° | 16" | 35" |
| Morris, MN | 2° | 82° | 26" | 45" |
| Sidney, MT | 4° | 85° | 15" | 30" |
| Sheldon, IA | 7° | 84° | 30" | 41" |
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
Warmer than it used to be
The last 30 years in Rosette Township averaged 0.6° warmer than the 1900s. The biggest change is in January (+2.7°).
A smaller shift than in 97% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Rosette Township compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Rosette Township’s place among South Dakota’s.
Rosette Township weather by month
Highs, lows and precipitation from NOAA’s grid at Rosette Township’s center; snow, wet days and snow on the ground from Ipswich, SD. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 22° | 3° | 0.5" | 6.0" | 4 | 24 | 0° – 27° |
| February | 26° | 7° | 0.6" | 6.8" | 4 | 19 | 0° – 28° |
| March | 40° | 19° | 0.9" | 5.4" | 5 | 13 | 19° – 44° |
| April | 55° | 31° | 1.8" | 4.0" | 6 | 4 | 34° – 50° |
| May | 68° | 43° | 3.3" | 0.0" | 8 | 0 | 51° – 62° |
| June | 77° | 54° | 3.5" | 0.0" | 9 | 0 | 61° – 70° |
| July | 83° | 59° | 3.1" | 0.0" | 7 | 0 | 63° – 76° |
| August | 81° | 56° | 2.5" | 0.0" | 6 | 0 | 63° – 73° |
| September | 73° | 47° | 2.0" | 0.0" | 5 | 0 | 54° – 64° |
| October | 57° | 34° | 1.8" | 1.1" | 5 | 1 | 37° – 50° |
| November | 40° | 20° | 0.6" | 4.7" | 3 | 6 | 17° – 40° |
| December | 27° | 9° | 0.6" | 5.7" | 4 | 16 | 4° – 26° |
| Year | 54° | 32° | 21.0" | 33.7" | 64 | 83 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 0° to 28°. June is the most reliable, staying within 10°.
Where Rosette Township’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Rosette Township’s center.
- Snow: Ipswich, SD.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Ipswich, SD, 7 miles from the town’s center, at about the same height; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Rosette Township’s climate
What is the weather like in Rosette Township?
A typical July afternoon reaches 83°, a January night drops to 3°, and about 34 inches of snow falls in a normal winter. Colder January nights than all but 113 U.S. towns; cooler July afternoons than 74% of U.S. towns.
How cold does it get in Rosette Township in winter?
January nights average 3°. About 180 nights a year reach 32° or below and 37 reach 0° or below. In the coldest January of the last 30 years the month averaged 0°.
How much snow does Rosette Township get?
About 34 inches in a normal winter at Ipswich, SD, most of it in February, with snow on the ground about 83 days a year.
How hot does it get in Rosette Township?
July, with a typical high of 83° and a low of 59°. About 13 days a year reach 90° (Ipswich, SD).
When is the first and last frost in Rosette Township?
In half of years the last spring frost (32°) comes by May 8 and the first fall frost by September 29, about 143 frost-free days, at Ipswich, SD.
What growing zone is Rosette Township in?
Zone 4b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −24°.
What is the best time of year to visit Rosette Township?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, July, August and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Rosette Township getting warmer?
Yes: 1991–2020 averaged 0.6° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 97% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Rosette Township.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.