Best Time to See Cardinals in Illinois
April, May and March is the best time to see cardinals in Illinois. Based on 13,125 verified iNaturalist observations, here is exactly when cardinals are most active across the year in Illinois.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated June 28, 2026.
Northern Cardinal · Donald Davesne CC BY
Northern Cardinal · Donald Davesne CC BY
Northern Cardinal · Morgan C CC BY
13,125 verified observations of cardinals in Illinois, recorded across 12 months of the year on iNaturalist.
When cardinals are recorded in Illinois
Peak month
April
2,393 records (18.2% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 1,191 | 9.1% |
| February | 1,096 | 8.4% |
| Marchpeak | 1,637 | 12.5% |
| Aprilpeak | 2,393 | 18.2% |
| Maypeak | 1,727 | 13.2% |
| June | 847 | 6.5% |
| July | 734 | 5.6% |
| August | 745 | 5.7% |
| September | 705 | 5.4% |
| October | 480 | 3.7% |
| November | 704 | 5.4% |
| December | 866 | 6.6% |
Cardinals you are most likely to see
| Species | Verified observations |
|---|---|
| Northern Cardinal | 13,125 |
Weather to expect, source Open-Meteo
Typical weather in Illinois
Recent typical conditions by month, so you can plan a trip around both when cardinals are active and what the weather is doing. The best months to look for cardinals sit around 34 to 73 degrees Fahrenheit, so pack for that.
| Month | Avg high | Avg low | Rain |
|---|---|---|---|
| Jan | 38°F | 23°F | 3" |
| Feb | 40°F | 22°F | 3.1" |
| Marbest time | 53°F | 34°F | 4.8" |
| Aprbest time | 63°F | 43°F | 4.1" |
| Maybest time | 73°F | 54°F | 4.6" |
| Jun | 83°F | 64°F | 3.5" |
| Jul | 85°F | 68°F | 4.3" |
| Aug | 83°F | 66°F | 3.9" |
| Sep | 79°F | 61°F | 3" |
| Oct | 65°F | 48°F | 4.9" |
| Nov | 52°F | 35°F | 1.8" |
| Dec | 45°F | 29°F | 2.3" |
Typical recent conditions (5-year means) from the Open-Meteo archive, averaged for Illinois. Weather varies year to year, so treat these as a guide.
More on cardinals in Illinois:
Sightings of cardinals in Illinois peak in April, when 2,393 of the year's 13,125 verified observations are logged — about 18.2% of the annual total. Activity stays high through April, May and March.
The quietest stretch is October, November and September, when cardinals are hardest to find — October sees just 480 records. If a reliable sighting matters, plan around the peak window rather than the off-season.
The cardinals you are most likely to encounter in Illinois are Northern Cardinal — 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 cardinals in Illinois
- Lewis & Clark National Historic Trail — National Historic Trail
- Lincoln Home National Historic Site — National Historic Site
- Emmett Till and Mamie Till-Mobley National Monument — National Monument
- Mormon Pioneer National Historic Trail — National Historic Trail
- New Philadelphia National Historic Site — National Historic Site
- Pullman National Historical Park — National Historical Park
Gear to see them
Frequently asked questions
What is the best month to see cardinals in Illinois?+
April is the single best month, and the broader peak window runs through April, May and March, based on 13,125 verified iNaturalist observations.
When are cardinals hardest to see in Illinois?+
October is the quietest month for cardinals in Illinois, with only 480 verified records.
Are cardinals active year-round in Illinois?+
Cardinals are recorded in 12 of 12 months in Illinois, so they can be seen year-round, with a clear peak in April.
More places to see cardinals
More wildlife in Illinois