Bon Homme County Courthouse · Photo: Ammodramus · CC0Tyndall has colder winter nights than 93% of U.S. towns
Midsummer highs settle at about 87°. By precipitation alone, it ranks drier than 87% of U.S. towns. January has warmed most since 1901–2000, part of a 1.1° rise. The frost-free window for a garden runs roughly May 1 to October 7.
A year in Tyndall at a glance
Each month’s typical high and low, and what it brings.
What stands out about Tyndall’s climate
Compared with towns across the U.S., with Tyndall’s place in South Dakota beside it.
What a year in Tyndall feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 158 frost-free days a year
In half of years the last 32° night comes by May 1 and the first by October 7. Frost and day counts come from NOAA’s station at Tyndall, SD, 0.3 miles from the town’s center, at about the same height.
The 2023 USDA map puts Tyndall’s center in zone 5a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −16°. 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 37 inches of snow a winter
Snow, measured at Tyndall, SD, falls mostly in February and December. Precipitation (rain plus melted snow) adds up to 27 inches a year; May is the wettest month and January the driest. Rain or snow falls on about 88 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Tyndall
90% 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 Tyndall, SD.
Living with Tyndall’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
158 frost-free days in zone 5a. The last frost comes by May 1 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 7.
Months with highs of 62–84° and lows of 40° or more: May, June, August and September.
Parks & trails →Of the yearly building losses FEMA expects in Tyndall from natural hazards, river flooding is the largest share (27%); heat waves, cold waves, winter storms and ice storms together are 24%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Tyndall and similar climates
TownRatings has no climate map of the towns around Tyndall yet.
Climates most like Tyndall’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 |
|---|---|---|---|---|
| Tyndall, SD | 11° | 87° | 27" | 37" |
| Hastings, NE | 15° | 87° | 27" | 29" |
| Council Bluffs, IA | 14° | 87° | 33" | 27" |
| Redwood Falls, MN | 6° | 83° | 29" | 44" |
| Air Force Academy, CO | 14° | 84° | 21" | 55" |
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 Tyndall averaged 1.1° warmer than the 1900s. The biggest change is in January (+3.2°).
A smaller shift than in 71% 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 Tyndall compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Tyndall’s place among South Dakota’s.
Tyndall weather by month
Highs, lows and precipitation from NOAA’s grid at Tyndall’s center; snow, wet days and snow on the ground from Tyndall, SD. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 30° | 11° | 0.6" | 6.5" | 5 | 17 | 12° – 35° |
| February | 35° | 14° | 0.8" | 7.4" | 5 | 13 | 12° – 34° |
| March | 47° | 25° | 1.4" | 5.3" | 7 | 6 | 26° – 52° |
| April | 60° | 35° | 3.1" | 4.1" | 9 | 2 | 38° – 54° |
| May | 71° | 47° | 3.9" | 0.2" | 11 | 0 | 54° – 65° |
| June | 82° | 58° | 3.8" | 0.0" | 10 | 0 | 65° – 74° |
| July | 87° | 63° | 3.1" | 0.0" | 8 | 0 | 67° – 84° |
| August | 84° | 61° | 3.2" | 0.0" | 9 | 0 | 67° – 76° |
| September | 77° | 51° | 2.9" | 0.0" | 7 | 0 | 57° – 70° |
| October | 62° | 38° | 2.4" | 0.8" | 7 | 1 | 43° – 55° |
| November | 47° | 25° | 1.0" | 5.0" | 5 | 3 | 26° – 45° |
| December | 33° | 15° | 0.8" | 7.3" | 5 | 15 | 12° – 30° |
| Year | 60° | 37° | 26.6" | 36.6" | 88 | 56 |
How much a month can swing
A normal is an average. March swings the most: from 1991 to 2020 its average ranged from 26° to 52°. August is the most reliable, staying within 9°.
Where Tyndall’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 Tyndall’s center.
- Snow: Tyndall, SD (NOAA station in town).
- Frost, freezing nights, 90° and 100° days, heating and cooling: Tyndall, SD, 0.3 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 Tyndall’s climate
What is the weather like in Tyndall?
A typical July afternoon reaches 87°, a January night drops to 11°, and about 37 inches of snow falls in a normal winter. Colder January nights than 93% of U.S. towns; hotter July afternoons than 60% of U.S. towns.
How cold does it get in Tyndall in winter?
January nights average 11°. About 157 nights a year reach 32° or below and 19 reach 0° or below. In the coldest January of the last 30 years the month averaged 12°.
How much snow does Tyndall get?
About 37 inches in a normal winter at Tyndall, SD, most of it in February and December, with snow on the ground about 56 days a year.
How hot does it get in Tyndall?
July, with a typical high of 87° and a low of 63°. About 26 days a year reach 90° and 2 reach 100° (Tyndall, SD).
When is the first and last frost in Tyndall?
In half of years the last spring frost (32°) comes by May 1 and the first fall frost by October 7, about 158 frost-free days, at Tyndall, SD.
What growing zone is Tyndall in?
Zone 5a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −16°.
What is the best time of year to visit Tyndall?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, August and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Tyndall getting warmer?
Yes: 1991–2020 averaged 1.1° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 71% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Tyndall.
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.