Best Time to See Bald Eagles in Illinois
February, January and March is the best time to see bald eagles in Illinois. Based on 4,373 verified iNaturalist observations, here is exactly when bald eagles 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.
Bald Eagle · Sam Kieschnick CC BY
Bald Eagle · Adrianh M. Orozco CC BY
Bald Eagle · Mike B CC BY-SA
4,373 verified observations of bald eagles in Illinois, recorded across 12 months of the year on iNaturalist.
When bald eagles are recorded in Illinois
Peak month
February
633 records (14.5% of the year)
| Month | Observations | Share |
|---|---|---|
| Januarypeak | 621 | 14.2% |
| Februarypeak | 633 | 14.5% |
| Marchpeak | 589 | 13.5% |
| April | 523 | 12% |
| May | 338 | 7.7% |
| June | 138 | 3.2% |
| July | 131 | 3% |
| August | 158 | 3.6% |
| September | 219 | 5% |
| October | 290 | 6.6% |
| November | 334 | 7.6% |
| December | 399 | 9.1% |
Bald Eagles you are most likely to see
| Species | Verified observations |
|---|---|
| Bald Eagle | 4,373 |
Weather to expect, source Open-Meteo
Typical weather in Illinois
Recent typical conditions by month, so you can plan a trip around both when bald eagles are active and what the weather is doing. The best months to look for bald eagles sit around 22 to 53 degrees Fahrenheit, so pack for that.
| Month | Avg high | Avg low | Rain |
|---|---|---|---|
| Janbest time | 38°F | 23°F | 3" |
| Febbest time | 40°F | 22°F | 3.1" |
| Marbest time | 53°F | 34°F | 4.8" |
| Apr | 63°F | 43°F | 4.1" |
| May | 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 bald eagles in Illinois:
Sightings of bald eagles in Illinois peak in February, when 633 of the year's 4,373 verified observations are logged — about 14.5% of the annual total. Activity stays high through February, January and March.
The quietest stretch is July, June and August, when bald eagles are hardest to find — July sees just 131 records. If a reliable sighting matters, plan around the peak window rather than the off-season.
The bald eagles you are most likely to encounter in Illinois are Bald Eagle — 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 bald eagles 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 bald eagles in Illinois?+
February is the single best month, and the broader peak window runs through February, January and March, based on 4,373 verified iNaturalist observations.
When are bald eagles hardest to see in Illinois?+
July is the quietest month for bald eagles in Illinois, with only 131 verified records.
Are bald eagles active year-round in Illinois?+
Bald eagles are recorded in 12 of 12 months in Illinois, so they can be seen year-round, with a clear peak in February.
More places to see bald eagles
More wildlife in Illinois