Best Time to See Cottonmouths in Oklahoma
April, May and October is the best time to see cottonmouths in Oklahoma. Based on 654 verified iNaturalist observations, here is exactly when cottonmouths are most active across the year in Oklahoma.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated July 22, 2026.
Northern Cottonmouth · kirk gardner CC BY
Northern Cottonmouth · Mila Turov CC BY
Northern Cottonmouth · Joshua Liverman CC BY
654 verified observations of cottonmouths in Oklahoma, recorded across 12 months of the year on iNaturalist.
When cottonmouths are recorded in Oklahoma
Peak month
April
154 records (23.5% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 3 | 0.5% |
| February | 2 | 0.3% |
| March | 56 | 8.6% |
| Aprilpeak | 154 | 23.5% |
| Maypeak | 118 | 18% |
| June | 73 | 11.2% |
| July | 51 | 7.8% |
| August | 40 | 6.1% |
| September | 69 | 10.6% |
| Octoberpeak | 76 | 11.6% |
| November | 8 | 1.2% |
| December | 4 | 0.6% |
Cottonmouths you are most likely to see
| Species | Verified observations |
|---|---|
| Northern Cottonmouth | 654 |
Weather to expect, source Open-Meteo
Typical weather in Oklahoma
Recent typical conditions by month, so you can plan a trip around both when cottonmouths are active and what the weather is doing. The best months to look for cottonmouths sit around 50 to 80 degrees Fahrenheit, so pack for that.
| Month | Avg high | Avg low | Rain |
|---|---|---|---|
| Jan | 51°F | 30°F | 1.3" |
| Feb | 51°F | 29°F | 1.4" |
| Mar | 63°F | 41°F | 2.1" |
| Aprbest time | 72°F | 50°F | 2.6" |
| Maybest time | 80°F | 60°F | 5" |
| Jun | 89°F | 69°F | 2.9" |
| Jul | 95°F | 74°F | 1.4" |
| Aug | 94°F | 74°F | 1.5" |
| Sep | 88°F | 68°F | 1.8" |
| Octbest time | 73°F | 52°F | 2.5" |
| Nov | 61°F | 41°F | 1.3" |
| Dec | 55°F | 35°F | 1.7" |
Typical recent conditions (5-year means) from the Open-Meteo archive, averaged for Oklahoma. Weather varies year to year, so treat these as a guide.
Sightings of cottonmouths in Oklahoma peak in April, when 154 of the year's 654 verified observations are logged — about 23.5% of the annual total. Activity stays high through April, May and October.
The quietest stretch is February and January, when cottonmouths are hardest to find — February sees just 2 records. If a reliable sighting matters, plan around the peak window rather than the off-season.
The cottonmouths you are most likely to encounter in Oklahoma are Northern Cottonmouth — 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 cottonmouths in Oklahoma
- Chickasaw National Recreation Area — National Recreation Area
- Butterfield Overland National Historic Trail — National Historic Trail
- Fort Smith National Historic Site — National Historic Site
- Oklahoma City National Memorial — National Memorial
- Santa Fe National Historic Trail — National Historic Trail
- Trail Of Tears National Historic Trail — National Historic Trail
Frequently asked questions
What is the best month to see cottonmouths in Oklahoma?+
April is the single best month, and the broader peak window runs through April, May and October, based on 654 verified iNaturalist observations.
When are cottonmouths hardest to see in Oklahoma?+
February is the quietest month for cottonmouths in Oklahoma, with only 2 verified records.
Are cottonmouths active year-round in Oklahoma?+
Cottonmouths are recorded in 12 of 12 months in Oklahoma, so they can be seen year-round, with a clear peak in April.
More wildlife in Oklahoma