Best Time to See Monarch Butterflies in Wyoming
August, July and September is the best time to see monarch butterflies in Wyoming. Based on 150 verified iNaturalist observations, here is exactly when monarch butterflies are most active across the year in Wyoming.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated June 28, 2026.
Monarch · ursusarctoshorribilis CC BY-ND
Migratory Monarch · Austin Saunders CC BY
Monarch · Mark Pollock CC BY
150 verified observations of monarch butterflies in Wyoming, recorded across 8 months of the year on iNaturalist.
When monarch butterflies are recorded in Wyoming
Peak month
August
54 records (36% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 0 | 0% |
| February | 0 | 0% |
| March | 0 | 0% |
| April | 1 | 0.7% |
| May | 1 | 0.7% |
| June | 7 | 4.7% |
| Julypeak | 33 | 22% |
| Augustpeak | 54 | 36% |
| Septemberpeak | 30 | 20% |
| October | 23 | 15.3% |
| November | 1 | 0.7% |
| December | 0 | 0% |
Monarch Butterflies you are most likely to see
| Species | Verified observations |
|---|---|
| Monarch | 150 |
Weather to expect, source Open-Meteo
Typical weather in Wyoming
Recent typical conditions by month, so you can plan a trip around both when monarch butterflies are active and what the weather is doing. The best months to look for monarch butterflies sit around 50 to 84 degrees Fahrenheit, so pack for that.
| Month | Avg high | Avg low | Rain |
|---|---|---|---|
| Jan | 27°F | 15°F | 0.9" |
| Feb | 25°F | 9°F | 0.7" |
| Mar | 35°F | 19°F | 1.6" |
| Apr | 45°F | 26°F | 1.9" |
| May | 60°F | 40°F | 2.3" |
| Jun | 74°F | 52°F | 1.7" |
| Julbest time | 84°F | 60°F | 0.3" |
| Augbest time | 82°F | 58°F | 0.9" |
| Sepbest time | 72°F | 50°F | 0.8" |
| Oct | 51°F | 33°F | 1.9" |
| Nov | 40°F | 24°F | 0.7" |
| Dec | 30°F | 17°F | 0.5" |
Typical recent conditions (5-year means) from the Open-Meteo archive, averaged for Wyoming. Weather varies year to year, so treat these as a guide.
More on monarch butterflies in Wyoming:
Sightings of monarch butterflies in Wyoming peak in August, when 54 of the year's 150 verified observations are logged — about 36% of the annual total. Activity stays high through August, July and September.
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 Wyoming 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 Wyoming
- Bighorn Canyon National Recreation Area — National Recreation Area
- Devils Tower National Monument — National Monument
- Fossil Butte National Monument — National Monument
- Grand Teton National Park — National Park
- Yellowstone National Park — National Park
- California National Historic Trail — National Historic Trail
Frequently asked questions
What is the best month to see monarch butterflies in Wyoming?+
August is the single best month, and the broader peak window runs through August, July and September, based on 150 verified iNaturalist observations.
When are monarch butterflies hardest to see in Wyoming?+
January is the quietest month for monarch butterflies in Wyoming, with no verified records on iNaturalist.
Are monarch butterflies active year-round in Wyoming?+
Monarch butterflies are recorded in 8 of 12 months in Wyoming, concentrated around August and July.
More places to see monarch butterflies
More wildlife in Wyoming