How Crowded Is Effigy Mounds in January?
January is a very quiet month at Effigy Mounds National Monument, running about 0.5× the park's average month — roughly 4% of the year's visitors come in January. That puts it between the July peak and the December low. Overall our best-time score rates January as "Poor" for a visit. Typical January weather averages a high near 27°F and a low around 10°F, with about 1.2" of precipitation and roughly 9" of snow. You'll get about 9.2 hours of daylight to explore.
Frequently Asked Questions
January is very quiet at Effigy Mounds National Monument (about 0.5× the average month). Our best-time score rates it "Poor". The single best month overall is May.
The busiest month is July and the quietest is December. January sits at about 0.5× the park's average, or 4% of annual visitation.
Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-06-20.