Monarch Butterflies in Colorado in August
Yes, August is one of the best months to see monarch butterflies in Colorado. It is the 1st busiest month of the year, with 710 of the 2,402 sightings logged across the year (29.6%), 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.
Peak month for monarch butterflies in Colorado
29.6%
of yearly sightings
710
records in August
#1
busiest month of 12
2,402
verified records a year
July 23.6%, August 29.6%, September 24.6%. Busiest month is August at 29.6%.
2,402 verified observations of monarch butterflies in Colorado, recorded across 9 months of the year on iNaturalist.
When monarch butterflies are recorded in Colorado
Peak month
August
710 records (29.6% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 0 | 0% |
| February | 2 | 0.1% |
| March | 0 | 0% |
| April | 3 | 0.1% |
| May | 16 | 0.7% |
| June | 163 | 6.8% |
| Julypeak | 566 | 23.6% |
| Augustpeak | 710 | 29.6% |
| Septemberpeak | 590 | 24.6% |
| October | 328 | 13.7% |
| November | 24 | 1% |
| December | 0 | 0% |
Monarch Butterflies you are most likely to see
| Species | Verified observations |
|---|---|
| Monarch | 2,402 |
In Colorado, August carries 29.6% of the year's monarch butterflies sightings, about 21.3 points above an even month-to-month split. That makes it the 1st busiest of the twelve months, out of 9 months with recorded activity.
Activity is rising from July (23.6%) into August, and it heads toward September (24.6%) after. This is right inside the peak window, so August is one of the surest months to plan a trip around.
The monarch butterflies most often recorded in Colorado are Monarch. Those counts are annual totals rather than a August split, so treat them as which species you are likely to encounter, while the month figures above show how many sightings fall in August itself.
Which monarch butterflies you are most likely to see
- Monarch2,402 records
Plan your monarch butterfly trip in Colorado
Start with live tours near Bent's Old Fort National Historic Site, then compare a nearby stay and a broader wildlife backup before you lock in the trip.
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Live tours nearbySee live tours near Bent's Old Fort National Historic Site
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 Bent's Old Fort National Historic Site
Compare hotels, cabins and lodges close to the best monarch butterfly viewing area in Colorado.
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Broader backupBook a monarch butterfly tour in Colorado
Compare guided wildlife tours, boat trips and nature experiences if you want a second travel network beyond the live widget.
Frequently asked questions
Can you see monarch butterflies in Colorado in August?+
Yes. August accounts for 710 of the 2,402 verified monarch butterflies sightings logged in Colorado across the year, which is 29.6% of the annual total.
Is August a good time to see monarch butterflies in Colorado?+
August is one of the best months. It ranks 1st of the year and sits inside the peak window of August, September and July.
What month is best for monarch butterflies in Colorado?+
August is the single busiest month, with the broader peak running through August, September and July, based on 2,402 verified observations.
Which monarch butterflies are you most likely to see in Colorado?+
The most-recorded species in Colorado are Monarch, based on all-time iNaturalist counts.
See monarch butterflies in Colorado in other months
More wildlife in Colorado