Best Time to See Bold Jumping Spiders in Iowa
May, September and June is the best time to see bold jumping spiders in Iowa. Based on 861 verified iNaturalist observations, here is exactly when bold jumping spiders 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.
Bold Jumping Spider · Curtis Meyers CC BY-SA
Bold Jumping Spider · Yaroslav Andrianov CC BY
Bold Jumping Spider · Robin Morehouse CC BY
861 verified observations of bold jumping spiders in Iowa, recorded across 12 months of the year on iNaturalist.
When bold jumping spiders are recorded in Iowa
Peak month
May
199 records (23.1% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 2 | 0.2% |
| February | 2 | 0.2% |
| March | 21 | 2.4% |
| April | 43 | 5% |
| Maypeak | 199 | 23.1% |
| Junepeak | 148 | 17.2% |
| July | 57 | 6.6% |
| August | 94 | 10.9% |
| Septemberpeak | 183 | 21.3% |
| October | 101 | 11.7% |
| November | 9 | 1% |
| December | 2 | 0.2% |
Bold Jumping Spiders you are most likely to see
| Species | Verified observations |
|---|---|
| Bold Jumping Spider | 861 |
Weather to expect, source Open-Meteo
Typical weather in Iowa
Recent typical conditions by month, so you can plan a trip around both when bold jumping spiders are active and what the weather is doing. The best months to look for bold jumping spiders sit around 52 to 82 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" |
| Apr | 60°F | 39°F | 2.5" |
| Maybest time | 70°F | 52°F | 5.3" |
| Junbest time | 82°F | 63°F | 4.1" |
| Jul | 84°F | 67°F | 3.6" |
| Aug | 83°F | 65°F | 3" |
| Sepbest time | 78°F | 59°F | 2.9" |
| Oct | 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 bold jumping spiders in Iowa peak in May, when 199 of the year's 861 verified observations are logged — about 23.1% of the annual total. Activity stays high through May, September and June.
The quietest stretch is January, February and December, when bold jumping spiders are hardest to find — January sees just 2 records. If a reliable sighting matters, plan around the peak window rather than the off-season.
The bold jumping spiders you are most likely to encounter in Iowa are Bold Jumping Spider — 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 bold jumping spiders 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
Frequently asked questions
What is the best month to see bold jumping spiders in Iowa?+
May is the single best month, and the broader peak window runs through May, September and June, based on 861 verified iNaturalist observations.
When are bold jumping spiders hardest to see in Iowa?+
January is the quietest month for bold jumping spiders in Iowa, with only 2 verified records.
Are bold jumping spiders active year-round in Iowa?+
Bold jumping spiders are recorded in 12 of 12 months in Iowa, so they can be seen year-round, with a clear peak in May.
More wildlife in Iowa