Best Time to See Scorpions in Illinois
May, June and April is the best time to see scorpions in Illinois. Based on 34 verified iNaturalist observations, here is exactly when scorpions 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 July 22, 2026.
Western Forest Scorpion · Seth CC BY
Black Hairy Scorpion · Public domain CC0
Southern Devil Scorpion · Alan Rockefeller CC BY
34 verified observations of scorpions in Illinois, recorded across 8 months of the year on iNaturalist.
When scorpions are recorded in Illinois
Peak month
May
11 records (32.4% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 0 | 0% |
| February | 0 | 0% |
| March | 1 | 2.9% |
| Aprilpeak | 7 | 20.6% |
| Maypeak | 11 | 32.4% |
| Junepeak | 8 | 23.5% |
| July | 1 | 2.9% |
| August | 0 | 0% |
| September | 3 | 8.8% |
| October | 2 | 5.9% |
| November | 0 | 0% |
| December | 1 | 2.9% |
Scorpions you are most likely to see
| Species | Verified observations |
|---|---|
| Striped Bark Scorpion | 32 |
Weather to expect, source Open-Meteo
Typical weather in Illinois
Recent typical conditions by month, so you can plan a trip around both when scorpions are active and what the weather is doing. The best months to look for scorpions sit around 43 to 83 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" |
| Aprbest time | 63°F | 43°F | 4.1" |
| Maybest time | 73°F | 54°F | 4.6" |
| Junbest time | 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 scorpions in Illinois:
Sightings of scorpions in Illinois peak in May, when 11 of the year's 34 verified observations are logged — about 32.4% of the annual total. Activity stays high through May, June and April.
The quietest stretch is January, February and August, when scorpions are hardest to find — no verified records exist for January. If a reliable sighting matters, plan around the peak window rather than the off-season.
The scorpions you are most likely to encounter in Illinois are Striped Bark Scorpion — 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 scorpions 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 scorpions in Illinois?+
May is the single best month, and the broader peak window runs through May, June and April, based on 34 verified iNaturalist observations.
When are scorpions hardest to see in Illinois?+
January is the quietest month for scorpions in Illinois, with no verified records on iNaturalist.
Are scorpions active year-round in Illinois?+
Scorpions are recorded in 8 of 12 months in Illinois, concentrated around May and June.
More places to see scorpions
More wildlife in Illinois