Best Time to See Rattlesnakes in Missouri
May, July and August is the best time to see rattlesnakes in Missouri. Based on 175 verified iNaturalist observations, here is exactly when rattlesnakes are most active across the year in Missouri.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated July 22, 2026.
Eastern Diamondback Rattlesnake · Scott Allen Davis CC BY
Panamint Rattlesnake · Matt Berger CC BY
Red Diamond Rattlesnake · Amy Huie CC BY
175 verified observations of rattlesnakes in Missouri, recorded across 8 months of the year on iNaturalist.
When rattlesnakes are recorded in Missouri
Peak month
May
44 records (25.1% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 0 | 0% |
| February | 0 | 0% |
| March | 0 | 0% |
| April | 23 | 13.1% |
| Maypeak | 44 | 25.1% |
| June | 29 | 16.6% |
| Julypeak | 32 | 18.3% |
| Augustpeak | 31 | 17.7% |
| September | 11 | 6.3% |
| October | 4 | 2.3% |
| November | 1 | 0.6% |
| December | 0 | 0% |
Rattlesnakes you are most likely to see
| Species | Verified observations |
|---|---|
| Timber Rattlesnake | 175 |
Weather to expect, source Open-Meteo
Typical weather in Missouri
Recent typical conditions by month, so you can plan a trip around both when rattlesnakes are active and what the weather is doing. The best months to look for rattlesnakes sit around 56 to 90 degrees Fahrenheit, so pack for that.
| Month | Avg high | Avg low | Rain |
|---|---|---|---|
| Jan | 43°F | 27°F | 3" |
| Feb | 45°F | 25°F | 3.2" |
| Mar | 57°F | 37°F | 5.6" |
| Apr | 67°F | 45°F | 4.7" |
| Maybest time | 74°F | 56°F | 5.9" |
| Jun | 86°F | 65°F | 4.3" |
| Julbest time | 90°F | 70°F | 4.2" |
| Augbest time | 88°F | 69°F | 5.1" |
| Sep | 84°F | 63°F | 2.2" |
| Oct | 68°F | 49°F | 5" |
| Nov | 57°F | 38°F | 2.1" |
| Dec | 50°F | 32°F | 2.1" |
Typical recent conditions (5-year means) from the Open-Meteo archive, averaged for Missouri. Weather varies year to year, so treat these as a guide.
Sightings of rattlesnakes in Missouri peak in May, when 44 of the year's 175 verified observations are logged — about 25.1% of the annual total. Activity stays high through May, July and August.
The quietest stretch is January, February and March, when rattlesnakes 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 rattlesnakes you are most likely to encounter in Missouri are Timber Rattlesnake — 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 rattlesnakes in Missouri
- George Washington Carver National Monument — National Monument
- Lewis & Clark National Historic Trail — National Historic Trail
- Ozark National Scenic Riverways — National Scenic Riverways
- Ulysses S Grant National Historic Site — National Historic Site
- Wilson's Creek National Battlefield — National Battlefield
- Butterfield Overland National Historic Trail — National Historic Trail
Frequently asked questions
What is the best month to see rattlesnakes in Missouri?+
May is the single best month, and the broader peak window runs through May, July and August, based on 175 verified iNaturalist observations.
When are rattlesnakes hardest to see in Missouri?+
January is the quietest month for rattlesnakes in Missouri, with no verified records on iNaturalist.
Are rattlesnakes active year-round in Missouri?+
Rattlesnakes are recorded in 8 of 12 months in Missouri, concentrated around May and July.
More wildlife in Missouri