Best Time to See Frogs in Oregon
August, June and May is the best time to see frogs in Oregon. Based on 19,685 verified iNaturalist observations, here is exactly when frogs are most active across the year in Oregon.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated June 28, 2026.
Pacific chorus frog · John G. Phillips CC BY
Pacific chorus frog · Public domain CC0
American Bullfrog · nmoorhatch CC BY
19,685 verified observations of frogs in Oregon, recorded across 12 months of the year on iNaturalist.
When frogs are recorded in Oregon
Peak month
August
3,190 records (16.2% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 492 | 2.5% |
| February | 584 | 3% |
| March | 1,148 | 5.8% |
| April | 2,147 | 10.9% |
| Maypeak | 2,703 | 13.7% |
| Junepeak | 2,782 | 14.1% |
| July | 2,683 | 13.6% |
| Augustpeak | 3,190 | 16.2% |
| September | 2,020 | 10.3% |
| October | 1,233 | 6.3% |
| November | 472 | 2.4% |
| December | 231 | 1.2% |
Frogs you are most likely to see
| Species | Verified observations |
|---|---|
| Pacific chorus frog | 8,991 |
| American Bullfrog | 2,873 |
| Northern Red-legged Frog | 2,600 |
| Western Toad | 1,980 |
| Cascades Frog | 717 |
| Coastal Tailed Frog | 714 |
| Great Basin Spadefoot | 586 |
| Foothill Yellow-legged Frog | 429 |
Weather to expect, source Open-Meteo
Typical weather in Oregon
Recent typical conditions by month, so you can plan a trip around both when frogs are active and what the weather is doing. The best months to look for frogs sit around 40 to 81 degrees Fahrenheit, so pack for that.
| Month | Avg high | Avg low | Rain |
|---|---|---|---|
| Jan | 39°F | 26°F | 2" |
| Feb | 38°F | 22°F | 2.4" |
| Mar | 43°F | 25°F | 1.9" |
| Apr | 52°F | 32°F | 2.2" |
| Maybest time | 61°F | 40°F | 2" |
| Junbest time | 71°F | 48°F | 1.1" |
| Jul | 83°F | 56°F | 0.1" |
| Augbest time | 81°F | 56°F | 0.4" |
| Sep | 71°F | 47°F | 1.2" |
| Oct | 58°F | 37°F | 1.2" |
| Nov | 45°F | 28°F | 2.3" |
| Dec | 37°F | 25°F | 2.4" |
Typical recent conditions (5-year means) from the Open-Meteo archive, averaged for Oregon. Weather varies year to year, so treat these as a guide.
More on frogs in Oregon:
Sightings of frogs in Oregon peak in August, when 3,190 of the year's 19,685 verified observations are logged — about 16.2% of the annual total. Activity stays high through August, June and May.
The quietest stretch is December, when frogs are hardest to find — December sees just 231 records. If a reliable sighting matters, plan around the peak window rather than the off-season.
The frogs you are most likely to encounter in Oregon are Pacific chorus frog, American Bullfrog and Northern Red-legged Frog — 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 frogs in Oregon
- Crater Lake National Park — National Park
- Fort Vancouver National Historic Site — National Historic Site
- Lewis & Clark National Historic Trail — National Historic Trail
- Lewis and Clark National Historical Park — National Historical Park
- Nez Perce National Historical Park — National Historical Park
- Oregon Caves National Monument & Preserve — National Monument & Preserve
Gear to see them
Frequently asked questions
What is the best month to see frogs in Oregon?+
August is the single best month, and the broader peak window runs through August, June and May, based on 19,685 verified iNaturalist observations.
When are frogs hardest to see in Oregon?+
December is the quietest month for frogs in Oregon, with only 231 verified records.
Are frogs active year-round in Oregon?+
Frogs are recorded in 12 of 12 months in Oregon, so they can be seen year-round, with a clear peak in August.