Best Time to See Yellow Rumped Warblers in Iowa
May, October and April is the best time to see yellow rumped warblers in Iowa. Based on 389 verified iNaturalist observations, here is exactly when yellow rumped warblers are most active across the year in Iowa.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated July 20, 2026.
Yellow-rumped Warbler · Curtis Meyers CC BY-SA
Myrtle Warbler · Andrea Romero CC BY
Yellow-rumped Warbler · Seth G. Breeding CC BY
389 verified observations of yellow rumped warblers in Iowa, recorded across 10 months of the year on iNaturalist.
When yellow rumped warblers are recorded in Iowa
Peak month
May
120 records (30.8% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 0 | 0% |
| February | 1 | 0.3% |
| March | 2 | 0.5% |
| Aprilpeak | 114 | 29.3% |
| Maypeak | 120 | 30.8% |
| June | 1 | 0.3% |
| July | 1 | 0.3% |
| August | 0 | 0% |
| September | 24 | 6.2% |
| Octoberpeak | 118 | 30.3% |
| November | 4 | 1% |
| December | 4 | 1% |
Yellow Rumped Warblers you are most likely to see
| Species | Verified observations |
|---|---|
| Yellow-rumped Warbler | 389 |
Weather to expect, source Open-Meteo
Typical weather in Iowa
Recent typical conditions by month, so you can plan a trip around both when yellow rumped warblers are active and what the weather is doing. The best months to look for yellow rumped warblers sit around 39 to 70 degrees Fahrenheit, so pack for that.
| Month | Avg high | Avg low | Rain |
|---|---|---|---|
| Jan | 29°F | 13°F | 1.8" |
| Feb | 30°F | 11°F | 1.3" |
| Mar | 48°F | 29°F | 2.6" |
| Aprbest time | 60°F | 39°F | 2.5" |
| Maybest time | 70°F | 52°F | 5.3" |
| Jun | 82°F | 63°F | 4.1" |
| Jul | 84°F | 67°F | 3.6" |
| Aug | 83°F | 65°F | 3" |
| Sep | 78°F | 59°F | 2.9" |
| Octbest time | 61°F | 44°F | 4.2" |
| Nov | 48°F | 31°F | 1.6" |
| Dec | 39°F | 23°F | 1.5" |
Typical recent conditions (5-year means) from the Open-Meteo archive, averaged for Iowa. Weather varies year to year, so treat these as a guide.
Sightings of yellow rumped warblers in Iowa peak in May, when 120 of the year's 389 verified observations are logged — about 30.8% of the annual total. Activity stays high through May, October and April.
The quietest stretch is January, August and February, when yellow rumped warblers 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 yellow rumped warblers you are most likely to encounter in Iowa are Yellow-rumped Warbler — 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 yellow rumped warblers in Iowa
- Effigy Mounds National Monument — National Monument
- Herbert Hoover National Historic Site — National Historic Site
- Lewis & Clark National Historic Trail — National Historic Trail
- Mormon Pioneer National Historic Trail — National Historic Trail
- Saylorville Reservoir (general location—use more specific hotspots)
- Red Rock Reservoir (general location—use more specific hotspots)
Frequently asked questions
What is the best month to see yellow rumped warblers in Iowa?+
May is the single best month, and the broader peak window runs through May, October and April, based on 389 verified iNaturalist observations.
When are yellow rumped warblers hardest to see in Iowa?+
January is the quietest month for yellow rumped warblers in Iowa, with no verified records on iNaturalist.
Are yellow rumped warblers active year-round in Iowa?+
Yellow rumped warblers are recorded in 10 of 12 months in Iowa, concentrated around May and October.
More wildlife in Iowa