Few U.S. towns have colder winter nights than Gem Township
On a normal July day the thermometer tops out near 84°. The wettest month is June; the driest is January. By precipitation alone, it ranks drier than 89% of U.S. towns. Tender plants can go out after about May 9; in half of years the first frost comes by September 26.
A year in Gem Township at a glance
Each month’s typical high and low, and what it brings.
What stands out about Gem Township’s climate
Compared with towns across the U.S., with Gem Township’s place in South Dakota beside it.
What a year in Gem Township feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 139 frost-free days a year
In half of years the last 32° night comes by May 9 and the first by September 26. Frost and day counts come from NOAA’s station at Aberdeen, SD, 7 miles from the town’s center, at about the same height.
The 2023 USDA map puts Gem Township’s center in zone 4a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −26°. 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 42 inches of snow a winter
Snow, measured at Bath 1ne, SD, falls mostly in December. Precipitation (rain plus melted snow) adds up to 22 inches a year; June is the wettest month and January the driest. Rain or snow falls on about 84 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Gem Township
93% 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 Aberdeen, SD.
Living with Gem Township’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
139 frost-free days in zone 4a. The last frost comes by May 9 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 26.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August and September. 11 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Gem Township from natural hazards, river flooding is the largest share (39%); heat waves, cold waves, winter storms and ice storms together are 39%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Gem Township and its neighbors
Every town next door is within a degree of Gem Township in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Gem 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 |
|---|---|---|---|---|
| Gem Township, SD | 3° | 84° | 22" | 42" |
| Bismarck, ND | 3° | 84° | 18" | 51" |
| Redwood Falls, MN | 6° | 83° | 29" | 44" |
| 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 Gem Township averaged 1.2° warmer than the 1900s. The biggest change is in January (+3.5°).
A smaller shift than in 59% 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 Gem Township compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Gem Township’s place among South Dakota’s.
Gem Township weather by month
Highs, lows and precipitation from NOAA’s grid at Gem Township’s center; snow, wet days and snow on the ground from Bath 1ne, SD. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 22° | 3° | 0.5" | 6.1" | 6 | −1° – 27° |
| February | 27° | 7° | 0.6" | 7.7" | 6 | 2° – 29° |
| March | 40° | 20° | 0.9" | 7.6" | 6 | 20° – 44° |
| April | 56° | 32° | 1.9" | 5.0" | 7 | 34° – 51° |
| May | 69° | 44° | 3.1" | 0.0" | 10 | 52° – 64° |
| June | 79° | 56° | 3.6" | 0.0" | 11 | 62° – 72° |
| July | 84° | 60° | 3.3" | 0.0" | 8 | 63° – 77° |
| August | 82° | 57° | 2.2" | 0.0" | 7 | 64° – 74° |
| September | 74° | 48° | 2.1" | 0.0" | 7 | 55° – 65° |
| October | 58° | 34° | 2.0" | 1.9" | 7 | 39° – 51° |
| November | 41° | 21° | 0.7" | 3.2" | 4 | 18° – 41° |
| December | 27° | 9° | 0.6" | 10.0" | 6 | 4° – 26° |
| Year | 55° | 33° | 21.5" | 41.5" | 84 |
How much a month can swing
A normal is an average. January swings the most: from 1991 to 2020 its average ranged from -1° to 27°. August is the most reliable, staying within 10°.
Where Gem 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 Gem Township’s center.
- Snow: Bath 1ne, SD.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Aberdeen, 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 Gem Township’s climate
What is the weather like in Gem Township?
A typical July afternoon reaches 84°, a January night drops to 3°, and about 42 inches of snow falls in a normal winter. Colder January nights than all but 104 U.S. towns; cooler July afternoons than 63% of U.S. towns.
How cold does it get in Gem Township in winter?
January nights average 3°. About 179 nights a year reach 32° or below and 39 reach 0° or below. In the coldest January of the last 30 years the month averaged −1°.
How much snow does Gem Township get?
About 42 inches in a normal winter at Bath 1ne, SD, most of it in December.
How hot does it get in Gem Township?
July, with a typical high of 84° and a low of 60°. About 15 days a year reach 90° (Aberdeen, SD).
When is the first and last frost in Gem Township?
In half of years the last spring frost (32°) comes by May 9 and the first fall frost by September 26, about 139 frost-free days, at Aberdeen, SD.
What growing zone is Gem Township in?
Zone 4a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −26°.
What is the best time of year to visit Gem 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 Gem Township getting warmer?
Yes: 1991–2020 averaged 1.2° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 59% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Gem 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.