Decorah, IA

Today’s Forecast:

Today’s Report:

About Decorah

Decorah is a northeast Iowa outdoor town where bluff trails, waterfalls, the Trout Run Trail, the Upper Iowa River, and community events fit easily into one trip.

Make the Most of a Decorah Day

Ride the paved loop or visit exposed overlooks during the driest part of the day. After rain, waterfall stops and paved sections can work better than steep or muddy bluff trails.

Weather Tips for Decorah

• For Decorah, 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.
• After steady rain, favor paved paths or well-drained routes until natural surfaces recover.
• 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:

• Trout Run Trail
• Dunning’s Spring Park
• Palisades Park
• Upper Iowa River
• Waukon
• Calmar
• Seed Savers Exchange

Plan Around the Conditions

Use the forecast to choose the best version of a Decorah 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 Decorah

Decorah Weather by Season

Winter

Winter at Decorah 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 Decorah 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 Decorah are often warm and humid, with strong sun, mosquitoes, and afternoon thunderstorm potential. Earlier starts make exposed routes and event grounds more comfortable. Carry water and use shade breaks during the hottest part of the day.

Fall

Fall is often one of the most comfortable seasons at Decorah, 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 48–50°F based on the surrounding Iowa region.
• Annual snowfall: generally 30–40 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 into 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: late May through October for trails, paddling, and camping.