Few U.S. towns have colder winter nights than Rolling Green Township
In July the day’s top temperature is typically 86°. Its yearly precipitation falls short of 91% of U.S. towns. The latest 30-year average runs 1.1° warmer than 1901–2000’s, with January up the most. The heating season runs October to April: each of those months averages under 50°.
A year in Rolling Green Township at a glance
Each month’s typical high and low, and what it brings.
What stands out about Rolling Green Township’s climate
Compared with towns across the U.S., with Rolling Green Township’s place in South Dakota beside it.
What a year in Rolling Green Township feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 142 frost-free days a year
In half of years the last 32° night comes by May 10 and the first by September 30. Frost and day counts come from NOAA’s station at Lemmon, SD, 17 miles from the town’s center, 270 ft higher.
The 2023 USDA map puts Rolling Green Township’s center in zone 4b: the coldest night of a typical winter, averaged over 1991–2020, reaches about −23°. 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 41 inches of snow a winter
Snow, measured at Keldron 8ssw, SD, falls mostly in March and December. Precipitation (rain plus melted snow) adds up to 17 inches a year; June is the wettest month and January the driest. Rain or snow falls on about 67 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Rolling Green Township
92% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October through May.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Lemmon, SD.
Living with Rolling Green Township’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
142 frost-free days in zone 4b. The last frost comes by May 10 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 30.
Months with highs of 62–84° and lows of 40° or more: May, June and September. 3.4 miles of trails are waiting.
Parks & trails →Cold waves are 70% of the yearly building losses FEMA expects in Rolling Green Township from natural hazards, the largest share. Normals are averages; the hazards page covers the extremes.
Natural hazards →Rolling Green Township and similar climates
TownRatings has no climate map of the towns around Rolling Green Township yet.
Climates most like Rolling Green 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 |
|---|---|---|---|---|
| Rolling Green Township, SD | 6° | 86° | 17" | 41" |
| Havre, MT | 6° | 85° | 13" | 41" |
| Watford City, ND | 4° | 84° | 16" | 50" |
| Gypsum, CO | 11° | 86° | 14" | 39" |
| Alliance, NE | 13° | 88° | 17" | 45" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
Warmer than it used to be
The last 30 years in Rolling Green Township averaged 1.1° warmer than the 1900s. The biggest change is in January (+3.8°).
A smaller shift than in 67% 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 Rolling Green Township compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Rolling Green Township’s place among South Dakota’s.
Rolling Green Township weather by month
Highs, lows and precipitation from NOAA’s grid at Rolling Green Township’s center; snow, wet days and snow on the ground from Keldron 8ssw, SD. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 27° | 6° | 0.3" | 3.6" | 3 | 6° – 29° |
| February | 31° | 10° | 0.5" | 6.5" | 5 | 1° – 31° |
| March | 43° | 20° | 0.8" | 9.2" | 5 | 20° – 46° |
| April | 56° | 30° | 1.6" | 3.9" | 6 | 36° – 50° |
| May | 68° | 42° | 2.8" | 0.3" | 9 | 49° – 60° |
| June | 78° | 52° | 3.2" | 0.0" | 9 | 60° – 69° |
| July | 86° | 58° | 2.5" | 0.0" | 6 | 63° – 79° |
| August | 85° | 55° | 1.9" | 0.0" | 6 | 64° – 75° |
| September | 75° | 45° | 1.4" | 0.0" | 5 | 54° – 66° |
| October | 58° | 32° | 1.5" | 4.9" | 6 | 37° – 51° |
| November | 42° | 20° | 0.5" | 4.3" | 3 | 18° – 41° |
| December | 30° | 10° | 0.4" | 8.4" | 5 | 8° – 28° |
| Year | 56° | 32° | 17.4" | 41.1" | 67 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 1° to 31°. June is the most reliable, staying within 10°.
Where Rolling Green 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 Rolling Green Township’s center.
- Snow: Keldron 8ssw, SD.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Lemmon, SD, 17 miles from the town’s center, 270 ft higher; 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 Rolling Green Township’s climate
What is the weather like in Rolling Green Township?
A typical July afternoon reaches 86°, a January night drops to 6°, and about 41 inches of snow falls in a normal winter. Colder January nights than 97% of U.S. towns; hotter July afternoons than 54% of U.S. towns.
How cold does it get in Rolling Green Township in winter?
January nights average 6°. About 171 nights a year reach 32° or below and 25 reach 0° or below. In the coldest January of the last 30 years the month averaged 6°.
How much snow does Rolling Green Township get?
About 41 inches in a normal winter at Keldron 8ssw, SD, most of it in March and December.
How hot does it get in Rolling Green Township?
July, with a typical high of 86° and a low of 58°. About 27 days a year reach 90° and 3 reach 100° (Lemmon, SD).
When is the first and last frost in Rolling Green Township?
In half of years the last spring frost (32°) comes by May 10 and the first fall frost by September 30, about 142 frost-free days, at Lemmon, SD.
What growing zone is Rolling Green Township in?
Zone 4b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −23°.
What is the best time of year to visit Rolling Green Township?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Rolling Green Township getting warmer?
Yes: 1991–2020 averaged 1.1° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 67% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Rolling Green 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.