Bighorn Sheep in South Dakota in September
Yes, September is a good month to see bighorn sheep in South Dakota. It is the 5th busiest month of the year, with 249 of the 2,010 sightings logged across the year (12.4%), based on verified iNaturalist records.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated June 28, 2026.
Good month for bighorn sheep in South Dakota
12.4%
of yearly sightings
249
records in September
#5
busiest month of 12
2,010
verified records a year
August 16.9%, September 12.4%, October 7.1%. Busiest month is June at 20%.
2,010 verified observations of bighorn sheep in South Dakota, recorded across 12 months of the year on iNaturalist.
When bighorn sheep are recorded in South Dakota
Peak month
June
401 records (20% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 19 | 0.9% |
| February | 14 | 0.7% |
| March | 46 | 2.3% |
| April | 60 | 3% |
| May | 279 | 13.9% |
| Junepeak | 401 | 20% |
| Julypeak | 386 | 19.2% |
| Augustpeak | 339 | 16.9% |
| September | 249 | 12.4% |
| October | 142 | 7.1% |
| November | 48 | 2.4% |
| December | 27 | 1.3% |
Bighorn Sheep you are most likely to see
| Species | Verified observations |
|---|---|
| Bighorn Sheep | 2,010 |
In South Dakota, September carries 12.4% of the year's bighorn sheep sightings, about 4.1 points above an even month-to-month split. That makes it the 5th busiest of the twelve months, out of 12 months with recorded activity.
Activity is easing off from August (16.9%) into September, and it heads toward October (7.1%) after. The busiest month is June (20%), so if timing is flexible, that window is the safer bet.
The bighorn sheep most often recorded in South Dakota are Bighorn Sheep. Those counts are annual totals rather than a September split, so treat them as which species you are likely to encounter, while the month figures above show how many sightings fall in September itself.
Which bighorn sheep you are most likely to see
- Bighorn Sheep2,010 records
Plan your bighorn sheep trip in South Dakota
Start with live tours near Badlands National Park, then compare a nearby stay and a broader wildlife backup before you lock in the trip.
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Frequently asked questions
Can you see bighorn sheep in South Dakota in September?+
Yes. September accounts for 249 of the 2,010 verified bighorn sheep sightings logged in South Dakota across the year, which is 12.4% of the annual total.
Is September a good time to see bighorn sheep in South Dakota?+
September is the 5th busiest month. It is workable, though June and July is the stronger window for a reliable sighting.
What month is best for bighorn sheep in South Dakota?+
June is the single busiest month, with the broader peak running through June, July and August, based on 2,010 verified observations.
Which bighorn sheep are you most likely to see in South Dakota?+
The most-recorded species in South Dakota are Bighorn Sheep, based on all-time iNaturalist counts.
See bighorn sheep in South Dakota in other months
More wildlife in South Dakota