Best Time to See Bees in Illinois
July, August and June is the best time to see bees in Illinois. Based on 92,820 verified iNaturalist observations, here is exactly when bees 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.
Interrupted Cellophane-cuckoo Bee · psweet CC BY-SA
Western Honey Bee · Public domain CC0
Autumnal Cellophane-Cuckoo · threelark CC BY
92,820 verified observations of bees in Illinois, recorded across 12 months of the year on iNaturalist.
When bees are recorded in Illinois
Peak month
July
26,662 records (28.7% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 24 | 0% |
| February | 54 | 0.1% |
| March | 778 | 0.8% |
| April | 6,674 | 7.2% |
| May | 8,738 | 9.4% |
| Junepeak | 14,534 | 15.7% |
| Julypeak | 26,662 | 28.7% |
| Augustpeak | 19,990 | 21.5% |
| September | 12,253 | 13.2% |
| October | 2,877 | 3.1% |
| November | 222 | 0.2% |
| December | 14 | 0% |
Bees you are most likely to see
| Species | Verified observations |
|---|---|
| Common Eastern Bumble Bee | 16,039 |
| Brown-belted Bumble Bee | 9,905 |
| Western Honey Bee | 8,093 |
| Two-spotted Bumble Bee | 6,737 |
| Eastern Carpenter Bee | 4,335 |
| Black-and-gold Bumble Bee | 2,872 |
| Ligated Furrow Bee | 2,348 |
| Golden Northern Bumble Bee | 2,159 |
Weather to expect, source Open-Meteo
Typical weather in Illinois
Recent typical conditions by month, so you can plan a trip around both when bees are active and what the weather is doing. The best months to look for bees sit around 64 to 85 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" |
| Mar | 53°F | 34°F | 4.8" |
| Apr | 63°F | 43°F | 4.1" |
| May | 73°F | 54°F | 4.6" |
| Junbest time | 83°F | 64°F | 3.5" |
| Julbest time | 85°F | 68°F | 4.3" |
| Augbest time | 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 bees in Illinois:
Sightings of bees in Illinois peak in July, when 26,662 of the year's 92,820 verified observations are logged — about 28.7% of the annual total. Activity stays high through July, August and June.
The quietest stretch is December, when bees are hardest to find — December sees just 14 records. If a reliable sighting matters, plan around the peak window rather than the off-season.
The bees you are most likely to encounter in Illinois are Common Eastern Bumble Bee, Brown-belted Bumble Bee and Western Honey Bee — 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 bees 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
Frequently asked questions
What is the best month to see bees in Illinois?+
July is the single best month, and the broader peak window runs through July, August and June, based on 92,820 verified iNaturalist observations.
When are bees hardest to see in Illinois?+
December is the quietest month for bees in Illinois, with only 14 verified records.
Are bees active year-round in Illinois?+
Bees are recorded in 12 of 12 months in Illinois, so they can be seen year-round, with a clear peak in July.
More places to see bees
More wildlife in Illinois