Effigy Mounds National Monument in March
March at Effigy Mounds National Monument averages a daytime high near 45°F and an overnight low around 25°F, with about 2.1" of precipitation and roughly 4" of snow. Visitation runs about 0.7× the park's average month, which makes March a quiet month here.
- Average low
- 25°F
- Average high
- 45°F
Range across the year: 10°F to 83°F
- Precipitation
- 2.1 in
- Snowfall
- 4 in
- Daylight
- 11.6 hours
Roughly 6% of the park's yearly visitors come in March: roughly 3,600 recreation visits in a typical year, based on National Park Service monthly counts from 1979 to 2025.
That makes March the 7th-busiest of the park's twelve months, sitting between the July peak (2×) and the December low (0.4×).
On our Best Time to Visit score March rates 38/100 ("Poor"). Our recommended month is May: pleasant weather with noticeably thinner crowds (shoulder season).
The daily average of about 35°F is cold, with winter conditions likely on higher ground. These figures are 1991–2020 NOAA climate normals from the nearest station, about 3.7 miles from the park.
Because June, July and August together draw about 42% of annual visitors, choosing March instead steps outside that summer crush — the single biggest lever on how crowded the park feels.
You'll have about 11.6 hours of daylight in March to explore — between the 8.8-hour midwinter low and the 15.2-hour summer high.
Park-wide, 2025 drew 56,912 recreation visits, down 8.2% from 61,975 in 2024.
Across the past decade overall visitation has risen about 7.1%, so a March visit is likely to feel busier than it did a few years ago.
How March compares with the months around it
| Month | Avg high / low | Crowds | Best-time score |
|---|---|---|---|
| February | 32°F / 13°F | 0.6× Quiet | 38 Poor |
| March | 45°F / 25°F | 0.7× Quiet | 38 Poor |
| April | 59°F / 37°F | 0.6× Quiet | 59 Fair |
All twelve months at Effigy Mounds, with the best time to visit.
Frequently Asked Questions
March averages a daytime high near 45°F and an overnight low around 25°F at Effigy Mounds National Monument, with about 2.1 inches of precipitation and roughly 4 inches of snow. These are 1991–2020 NOAA climate normals from the nearest station, about 3.7 miles from the park, so conditions inside the park can differ, especially at other elevations.
March is quiet at Effigy Mounds National Monument (about 0.7× the average month). Our best-time score rates it "Poor" at 38/100. Our recommended month is May.
The busiest month is July and the quietest is December. March sits at about 0.7× the park's average, or 6% of annual visitation.
A typical March sees about 4,000 recreation visits at Effigy Mounds National Monument, based on National Park Service monthly counts from 1979–2025.
Where to stay near Effigy Mounds in March
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Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-10-11.