Effigy Mounds National Monument, IA
Today’s Forecast:
Today’s Report:
Hiking
Good for hiking. High near 42°F. Low rain risk (1%). Light wind (9 mph).
- Temp: Marginal weather factor
- Rain: Favorable conditions
- Wind: Favorable conditions
- Thunderstorm: Favorable conditions
Outdoor Events / Activities
Not Recommended for outdoor events / activities. High near 42°F. Low rain risk (1%). Light wind (9 mph). Temperatures outside comfort limits (42°F).
- Temp: Unfavorable weather factor
- Rain: Favorable conditions
- Wind: Favorable conditions
- Thunderstorm: Favorable conditions
Camping
Good for camping. High near 42°F. Low rain risk (1%). Light wind (9 mph).
- Temp: Marginal weather factor
- Rain: Favorable conditions
- Wind: Favorable conditions
- Thunderstorm: Favorable conditions
About Effigy Mounds National Monument
Effigy Mounds National Monument protects ancient mound groups along wooded Mississippi River bluffs, with climbing trails, overlooks, and a quiet landscape that deserves unhurried planning.
Make the Most of a Effigy Mounds National Monument Day
Allow extra time for elevation changes and respectful visits to the cultural landscape. Use cooler hours for bluff climbs, and remember that camping is outside the monument in nearby public recreation areas.
Weather Tips for Effigy Mounds National Monument
- For Effigy Mounds National Monument, check temperature, wind, rain timing, and thunderstorm potential before choosing the day’s route.
- If thunder is possible, complete exposed overlooks, prairie routes, golf, and event grounds early and keep shelter close.
- Check overnight lows, wet ground, drainage, and the nearest substantial shelter before settling into camp.
- Open-country wind and summer humidity can make biking and hiking feel harder than the mileage suggests.
Nearby Towns and Areas
This page can also be useful when planning outdoor time near:
- Harpers Ferry
- Yellow River State Forest
- Sny Magill
- Marquette
- McGregor
- Pikes Peak State Park
- Mississippi River
Plan Around the Conditions
Use the forecast to choose the best version of a Effigy Mounds National Monument day. Match wind, storm timing, water levels, trail surfaces, road conditions, and temperature to the activity that gives your group the safest and most comfortable plan.
7-Day Forecast for Effigy Mounds National Monument
Effigy Mounds National Monument Weather by Season
Winter
Winter at Effigy Mounds National Monument brings cold, wind chill, snow, and freeze-thaw ice. Shaded paths, stairs, bridges, and rural roads may stay slick after sunny areas clear. Check road and facility status before a long drive.
Spring
Spring around Effigy Mounds National Monument is changeable, with rain, muddy surfaces, rising waterways, and severe thunderstorms. Give natural-surface trails time to drain after heavy rain. Lightning, hail, and strong wind can arrive well ahead of a rain core.
Summer
Summer days at Effigy Mounds National Monument are often warm and humid, with strong sun, mosquitoes, and afternoon thunderstorm potential. Earlier starts make exposed routes and event grounds more comfortable. Ventilate tents and keep a dry shelter plan for overnight storms.
Fall
Fall is often one of the most comfortable seasons at Effigy Mounds National Monument, with lower humidity, cooler nights, and changing color. Dry spells can produce excellent trail and cycling conditions. Watch for harvest traffic on rural roads and hunting activity near public lands.
Key Climate Data Points
- Annual average temperature: around 50°F based on the surrounding Iowa region.
- Annual snowfall: generally 25–35 inches, with meaningful year-to-year variation.
- Warmest months: June through August are typically warmest, with July often bringing the highest heat and humidity.
- Coolest months: December through February are coldest, and January commonly has the strongest winter chill.
- Wettest season: late spring and early summer usually brings the greatest rainfall and thunderstorm frequency.
- Driest season: winter is normally driest, although snow, ice, and frozen ground still affect plans.
- Best outdoor window: May through October, especially early fall for bluff hiking.