Best Time to See Monarch Butterflies in Idaho
August, September and July is the best time to see monarch butterflies in Idaho. Based on 481 verified iNaturalist observations, here is exactly when monarch butterflies are most active across the year in Idaho.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated June 28, 2026.
481 verified observations of monarch butterflies in Idaho, recorded across 6 months of the year on iNaturalist.
When monarch butterflies are recorded in Idaho
Peak month
August
172 records (35.8% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 0 | 0% |
| February | 0 | 0% |
| March | 0 | 0% |
| April | 0 | 0% |
| May | 5 | 1% |
| June | 76 | 15.8% |
| Julypeak | 104 | 21.6% |
| Augustpeak | 172 | 35.8% |
| Septemberpeak | 105 | 21.8% |
| October | 19 | 4% |
| November | 0 | 0% |
| December | 0 | 0% |
Monarch Butterflies you are most likely to see
| Species | Verified observations |
|---|---|
| Monarch | 481 |
Sightings of monarch butterflies in Idaho peak in August, when 172 of the year's 481 verified observations are logged — about 35.8% of the annual total. Activity stays high through August, September and July.
The quietest stretch is January, February and March, when monarch butterflies are hardest to find — no verified records exist for January. If a reliable sighting matters, plan around the peak window rather than the off-season.
The monarch butterflies you are most likely to encounter in Idaho are Monarch — 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 monarch butterflies in Idaho
- City Of Rocks National Reserve — National Reserve
- Craters Of The Moon National Monument & Preserve — National Monument & Preserve
- Hagerman Fossil Beds National Monument — National Monument
- Lewis & Clark National Historic Trail — National Historic Trail
- Nez Perce National Historical Park — National Historical Park
- Yellowstone National Park — National Park
Plan your monarch butterfly trip in Idaho
Start with live tours near City Of Rocks National Reserve, then compare a nearby stay and a broader wildlife backup before you lock in the trip.
GetYourGuide
Live tours nearbySee live tours near City Of Rocks National Reserve
Use the live GetYourGuide widget to compare local departures and activity styles close to the main monarch butterfly viewing area.
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Stay nearbyStay near City Of Rocks National Reserve
Compare hotels, cabins and lodges close to the best monarch butterfly viewing area in Idaho.
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Broader backupBook a monarch butterfly tour in Idaho
Compare guided wildlife tours, boat trips and nature experiences if you want a second travel network beyond the live widget.
Frequently asked questions
What is the best month to see monarch butterflies in Idaho?+
August is the single best month, and the broader peak window runs through August, September and July, based on 481 verified iNaturalist observations.
When are monarch butterflies hardest to see in Idaho?+
January is the quietest month for monarch butterflies in Idaho, with no verified records on iNaturalist.
Are monarch butterflies active year-round in Idaho?+
Monarch butterflies are recorded in 6 of 12 months in Idaho, concentrated around August and September.
More wildlife in Idaho