Best Time to See Monarch Butterflies in Oregon
June, August and July is the best time to see monarch butterflies in Oregon. Based on 577 verified iNaturalist observations, here is exactly when monarch butterflies are most active across the year in Oregon.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated June 28, 2026.
577 verified observations of monarch butterflies in Oregon, recorded across 7 months of the year on iNaturalist.
When monarch butterflies are recorded in Oregon
Peak month
June
164 records (28.4% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 0 | 0% |
| February | 0 | 0% |
| March | 0 | 0% |
| April | 0 | 0% |
| May | 17 | 2.9% |
| Junepeak | 164 | 28.4% |
| Julypeak | 136 | 23.6% |
| Augustpeak | 141 | 24.4% |
| September | 88 | 15.3% |
| October | 28 | 4.9% |
| November | 3 | 0.5% |
| December | 0 | 0% |
Monarch Butterflies you are most likely to see
| Species | Verified observations |
|---|---|
| Monarch | 577 |
Sightings of monarch butterflies in Oregon peak in June, when 164 of the year's 577 verified observations are logged — about 28.4% of the annual total. Activity stays high through June, August 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 Oregon 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 Oregon
- Crater Lake National Park — National Park
- Fort Vancouver National Historic Site — National Historic Site
- Lewis & Clark National Historic Trail — National Historic Trail
- Lewis and Clark National Historical Park — National Historical Park
- Nez Perce National Historical Park — National Historical Park
- Oregon Caves National Monument & Preserve — National Monument & Preserve
Plan your monarch butterfly trip in Oregon
Start with live tours near Crater Lake National Park, then compare a nearby stay and a broader wildlife backup before you lock in the trip.
GetYourGuide
Live tours nearbySee live tours near Crater Lake National Park
Use the live GetYourGuide widget to compare local departures and activity styles close to the main monarch butterfly viewing area.
Booking.com
Stay nearbyStay near Crater Lake National Park
Compare hotels, cabins and lodges close to the best monarch butterfly viewing area in Oregon.
Viator
Broader backupBook a monarch butterfly tour in Oregon
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 Oregon?+
June is the single best month, and the broader peak window runs through June, August and July, based on 577 verified iNaturalist observations.
When are monarch butterflies hardest to see in Oregon?+
January is the quietest month for monarch butterflies in Oregon, with no verified records on iNaturalist.
Are monarch butterflies active year-round in Oregon?+
Monarch butterflies are recorded in 7 of 12 months in Oregon, concentrated around June and August.
More wildlife in Oregon