Best Time to See Snakes in South Dakota
June, May and July is the best time to see snakes in South Dakota. Based on 2,181 verified iNaturalist observations, here is exactly when snakes are most active across the year in South Dakota.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated June 28, 2026.
Bullsnake · Rory O'Shea CC BY
Prairie Rattlesnake · Public domain CC0
Plains Garter Snake · Public domain CC0
2,181 verified observations of snakes in South Dakota, recorded across 12 months of the year on iNaturalist.
When snakes are recorded in South Dakota
Peak month
June
538 records (24.7% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 3 | 0.1% |
| February | 4 | 0.2% |
| March | 11 | 0.5% |
| April | 75 | 3.4% |
| Maypeak | 478 | 21.9% |
| Junepeak | 538 | 24.7% |
| Julypeak | 368 | 16.9% |
| August | 272 | 12.5% |
| September | 272 | 12.5% |
| October | 143 | 6.6% |
| November | 14 | 0.6% |
| December | 3 | 0.1% |
Snakes you are most likely to see
| Species | Verified observations |
|---|---|
| Plains Garter Snake | 490 |
| Gopher Snake | 342 |
| Prairie Rattlesnake | 311 |
| Western Terrestrial Garter Snake | 208 |
| North American Racer | 193 |
| Common Garter Snake | 172 |
| Red-bellied Snake | 120 |
| Western Foxsnake | 111 |
Weather to expect, source Open-Meteo
Typical weather in South Dakota
Recent typical conditions by month, so you can plan a trip around both when snakes are active and what the weather is doing. The best months to look for snakes sit around 49 to 87 degrees Fahrenheit, so pack for that.
| Month | Avg high | Avg low | Rain |
|---|---|---|---|
| Jan | 31°F | 16°F | 0.5" |
| Feb | 31°F | 11°F | 0.7" |
| Mar | 44°F | 25°F | 1.6" |
| Apr | 54°F | 34°F | 2.4" |
| Maybest time | 68°F | 49°F | 3.7" |
| Junbest time | 84°F | 63°F | 2.2" |
| Julbest time | 87°F | 67°F | 2.5" |
| Aug | 86°F | 66°F | 1.6" |
| Sep | 78°F | 58°F | 2.1" |
| Oct | 58°F | 40°F | 2" |
| Nov | 46°F | 29°F | 0.8" |
| Dec | 35°F | 19°F | 1.3" |
Typical recent conditions (5-year means) from the Open-Meteo archive, averaged for South Dakota. Weather varies year to year, so treat these as a guide.
More on snakes in South Dakota:
Sightings of snakes in South Dakota peak in June, when 538 of the year's 2,181 verified observations are logged — about 24.7% of the annual total. Activity stays high through June, May and July.
The quietest stretch is January, December and February, when snakes are hardest to find — January sees just 3 records. If a reliable sighting matters, plan around the peak window rather than the off-season.
The snakes you are most likely to encounter in South Dakota are Plains Garter Snake, Gopher Snake and Prairie Rattlesnake — the most-recorded species in the state. Each keeps its own seasonal rhythm, but the month-by-month pattern above reflects every reported sighting together.
Where to go
Best places to see snakes in South Dakota
- Badlands National Park — National Park
- Jewel Cave National Monument — National Monument
- Lewis & Clark National Historic Trail — National Historic Trail
- Missouri National Recreational River — National Recreational River
- Wind Cave National Park — National Park
- Minuteman Missile National Historic Site — National Historic Site
Gear to see them
Frequently asked questions
What is the best month to see snakes in South Dakota?+
June is the single best month, and the broader peak window runs through June, May and July, based on 2,181 verified iNaturalist observations.
When are snakes hardest to see in South Dakota?+
January is the quietest month for snakes in South Dakota, with only 3 verified records.
Are snakes active year-round in South Dakota?+
Snakes are recorded in 12 of 12 months in South Dakota, so they can be seen year-round, with a clear peak in June.
More places to see snakes
More wildlife in South Dakota