Best Time to See Yellow Rumped Warblers in Colorado
May, April and September is the best time to see yellow rumped warblers in Colorado. Based on 2,080 verified iNaturalist observations, here is exactly when yellow rumped warblers 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 20, 2026.
Audubon's Warbler · Nate Sabo CC BY
Yellow-rumped Warbler · Rhonda Ridley CC BY-SA
Yellow-rumped Warbler · Court Harding CC BY
2,080 verified observations of yellow rumped warblers in Colorado, recorded across 12 months of the year on iNaturalist.
When yellow rumped warblers are recorded in Colorado
Peak month
May
676 records (32.5% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 14 | 0.7% |
| February | 13 | 0.6% |
| March | 21 | 1% |
| Aprilpeak | 451 | 21.7% |
| Maypeak | 676 | 32.5% |
| June | 168 | 8.1% |
| July | 177 | 8.5% |
| August | 171 | 8.2% |
| Septemberpeak | 254 | 12.2% |
| October | 108 | 5.2% |
| November | 8 | 0.4% |
| December | 19 | 0.9% |
Yellow Rumped Warblers you are most likely to see
| Species | Verified observations |
|---|---|
| Yellow-rumped Warbler | 2,080 |
Weather to expect, source Open-Meteo
Typical weather in Colorado
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 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" |
| Jun | 69°F | 42°F | 2.1" |
| Jul | 76°F | 49°F | 2.5" |
| Aug | 75°F | 48°F | 1.7" |
| Sepbest time | 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 yellow rumped warblers in Colorado peak in May, when 676 of the year's 2,080 verified observations are logged — about 32.5% of the annual total. Activity stays high through May, April and September.
The quietest stretch is November, when yellow rumped warblers are hardest to find — November sees just 8 records. 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 Colorado 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 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 yellow rumped warblers in Colorado?+
May is the single best month, and the broader peak window runs through May, April and September, based on 2,080 verified iNaturalist observations.
When are yellow rumped warblers hardest to see in Colorado?+
November is the quietest month for yellow rumped warblers in Colorado, with only 8 verified records.
Are yellow rumped warblers active year-round in Colorado?+
Yellow rumped warblers are recorded in 12 of 12 months in Colorado, so they can be seen year-round, with a clear peak in May.
More wildlife in Colorado