Monarch Butterflies in Louisiana in September
Yes, September is a good month to see monarch butterflies in Louisiana. It is the 4th busiest month of the year, with 299 of the 2,769 sightings logged across the year (10.8%), 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 July 2, 2026.
Good month for monarch butterflies in Louisiana
10.8%
of yearly sightings
299
records in September
#4
busiest month of 12
2,769
verified records a year
August 7.2%, September 10.8%, October 17.8%. Busiest month is October at 17.8%.
2,769 verified observations of monarch butterflies in Louisiana, recorded across 12 months of the year on iNaturalist.
When monarch butterflies are recorded in Louisiana
Peak month
October
492 records (17.8% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 73 | 2.6% |
| February | 40 | 1.4% |
| March | 291 | 10.5% |
| Aprilpeak | 405 | 14.6% |
| May | 181 | 6.5% |
| June | 163 | 5.9% |
| July | 149 | 5.4% |
| August | 200 | 7.2% |
| September | 299 | 10.8% |
| Octoberpeak | 492 | 17.8% |
| Novemberpeak | 324 | 11.7% |
| December | 152 | 5.5% |
Monarch Butterflies you are most likely to see
| Species | Verified observations |
|---|---|
| Monarch | 2,769 |
In Louisiana, September carries 10.8% of the year's monarch butterflies sightings, about 2.5 points above an even month-to-month split. That makes it the 4th busiest of the twelve months, out of 12 months with recorded activity.
Activity is rising from August (7.2%) into September, and it heads toward October (17.8%) after. The busiest month is October (17.8%), so if timing is flexible, that window is the safer bet.
The monarch butterflies most often recorded in Louisiana are Monarch. 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 monarch butterflies you are most likely to see
- Monarch2,769 records
Plan your monarch butterfly trip in Louisiana
Start with live tours near Jean Lafitte National Historical Park and Preserve, then compare a nearby stay and a broader wildlife backup before you lock in the trip.
GetYourGuide
Live tours nearbySee live tours near Jean Lafitte National Historical Park and Preserve
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 Jean Lafitte National Historical Park and Preserve
Compare hotels, cabins and lodges close to the best monarch butterfly viewing area in Louisiana.
Viator
Broader backupBook a monarch butterfly tour in Louisiana
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 Louisiana in September?+
Yes. September accounts for 299 of the 2,769 verified monarch butterflies sightings logged in Louisiana across the year, which is 10.8% of the annual total.
Is September a good time to see monarch butterflies in Louisiana?+
September is the 4th busiest month. It is workable, though October and April is the stronger window for a reliable sighting.
What month is best for monarch butterflies in Louisiana?+
October is the single busiest month, with the broader peak running through October, April and November, based on 2,769 verified observations.
Which monarch butterflies are you most likely to see in Louisiana?+
The most-recorded species in Louisiana are Monarch, based on all-time iNaturalist counts.
See monarch butterflies in Louisiana in other months
More wildlife in Louisiana