Best Time to See Brown Recluses in Colorado
June, May and April is the best time to see brown recluses in Colorado. Based on 9 verified iNaturalist observations, here is exactly when brown recluses are most active across the year in Colorado.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated July 22, 2026.
9 verified observations of brown recluses in Colorado, recorded across 6 months of the year on iNaturalist.
When brown recluses are recorded in Colorado
Peak month
June
3 records (33.3% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 0 | 0% |
| February | 0 | 0% |
| March | 0 | 0% |
| Aprilpeak | 1 | 11.1% |
| Maypeak | 2 | 22.2% |
| Junepeak | 3 | 33.3% |
| July | 1 | 11.1% |
| August | 1 | 11.1% |
| September | 0 | 0% |
| October | 0 | 0% |
| November | 1 | 11.1% |
| December | 0 | 0% |
Brown Recluses you are most likely to see
| Species | Verified observations |
|---|---|
| Brown Recluse | 9 |
Weather to expect, source Open-Meteo
Typical weather in Colorado
Recent typical conditions by month, so you can plan a trip around both when brown recluses are active and what the weather is doing. The best months to look for brown recluses sit around 20 to 69 degrees Fahrenheit, so pack for that.
| Month | Avg high | Avg low | Rain |
|---|---|---|---|
| Jan | 27°F | 5°F | 0.5" |
| Feb | 27°F | 3°F | 0.9" |
| Mar | 34°F | 9°F | 1.3" |
| Aprbest time | 46°F | 20°F | 1.1" |
| Maybest time | 57°F | 31°F | 2.5" |
| Junbest time | 69°F | 42°F | 2.1" |
| Jul | 76°F | 49°F | 2.5" |
| Aug | 75°F | 48°F | 1.7" |
| Sep | 69°F | 41°F | 1.1" |
| Oct | 54°F | 27°F | 0.8" |
| Nov | 40°F | 18°F | 0.6" |
| Dec | 30°F | 10°F | 0.9" |
Typical recent conditions (5-year means) from the Open-Meteo archive, averaged for Colorado. Weather varies year to year, so treat these as a guide.
Sightings of brown recluses in Colorado peak in June, when 3 of the year's 9 verified observations are logged — about 33.3% of the annual total. Activity stays high through June, May and April.
The quietest stretch is January, February and March, when brown recluses 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 brown recluses you are most likely to encounter in Colorado are Brown Recluse — 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 brown recluses in Colorado
- Bent's Old Fort National Historic Site — National Historic Site
- Black Canyon Of The Gunnison National Park — National Park
- Colorado National Monument — National Monument
- Curecanti National Recreation Area — National Recreation Area
- Dinosaur National Monument — National Monument
- Great Sand Dunes National Park & Preserve — National Park & Preserve
Frequently asked questions
What is the best month to see brown recluses in Colorado?+
June is the single best month, and the broader peak window runs through June, May and April, based on 9 verified iNaturalist observations.
When are brown recluses hardest to see in Colorado?+
January is the quietest month for brown recluses in Colorado, with no verified records on iNaturalist.
Are brown recluses active year-round in Colorado?+
Brown recluses are recorded in 6 of 12 months in Colorado, concentrated around June and May.
More places to see brown recluses
More wildlife in Colorado