There are 28,526 recorded sightings of Monarch Butterfly in Illinois, with 3,351 observations documented in the past 12 months. Local sightings are most frequently reported in June through September.
When to See Monarch Butterfly in Illinois
Most often reported in June through September.
| Month | Recorded Sightings | Peak Month |
|---|---|---|
| January | 0 | No |
| February | 1 | No |
| March | 0 | No |
| April | 41 | No |
| May | 474 | No |
| June | 1,325 | Yes |
| July | 4,230 | Yes |
| August | 4,764 | Yes |
| September | 3,739 | Yes |
| October | 727 | No |
| November | 37 | No |
| December | 0 | No |
Compared With Other Regions
Explore how Monarch Butterfly sightings in Illinois compare to other North American hubs:
Orange wings with black veins and a black border dotted with white make this butterfly instantly familiar. It is found across Mexico, the United States and Canada, and migrates long distances, with many overwintering in Mexican mountain forests. Look in summer for adults and caterpillars on milkweed, and in autumn for streams of migrants heading south.
Other Wildlife to Look for in Illinois
Track Monarch Butterfly in Illinois
See where Monarch Butterfly was reported near you — get alerts when wildlife is spotted nearby.
Frequently Asked Questions
When is the best time to see a Monarch Butterfly in Illinois?
Monarch Butterfly is most often reported in Illinois in June through September, based on GBIF records. Reports partly reflect when more people are outdoors, so sightings in other months are possible.
Where can I see a Monarch Butterfly in Illinois?
There are 28,526 documented Monarch Butterfly records in Illinois. Parks, refuges and protected areas with suitable habitat are the best places to start; the charts above show when it's reported most.
How can I find Monarch Butterfly sightings near me in Illinois?
Use the WildMap app on iOS to see recent reports within 100 km from the past 7 days for free (WildMap Pro: 200 km and 30 days), and turn on alerts for sightings near you in Illinois.