Based on 6,485 research-grade iNaturalist observations in Illinois, House Finch is most often recorded in April; in Illinois it behaves like a year-round resident. It ranks #14 among birds recorded in the state in our data.
Haemorhous mexicanus
House Finch in Illinois by month
Bars show research-grade observations per month. They mix true seasonality with how often people are outdoors, so treat small numbers with caution.
Also seen in Illinois in April

American Robin
Canada Goose
Red-winged Blackbird

Mallard

Northern Cardinal

House Sparrow

Brown-headed Cowbird

Common Grackle
Places to look in Illinois
Cahokia
Botanical GardenMorton Arboretum
Shawnee National Forest
Chicago Botanic Garden
Ladd Arboretum
State ParkStarved Rock State Park
FAQ
When does House Finch appear in Illinois?
Mainly March–February, with the most records in April.
How common is House Finch in Illinois?
It ranks #14 by number of iNaturalist observations among birds in Illinois (6,485 records in our sample).