Lake Rathbun, IA
Today’s Forecast:
Today’s Report:
Boating
Not Recommended for boating. High near 42°F. Light wind (7 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. Light wind (7 mph).
- Temp: Marginal weather factor
- Rain: Favorable conditions
- Wind: Favorable conditions
- Thunderstorm: Favorable conditions
Golf
Not Recommended for golf. High near 42°F. Light wind (7 mph). Temperatures outside comfort limits (42°F).
- Temp: Unfavorable weather factor
- Rain: Favorable conditions
- Wind: Favorable conditions
- Thunderstorm: Favorable conditions
About Lake Rathbun
Lake Rathbun is southern Iowa’s largest lake-recreation hub, combining boating, beaches, multiple campgrounds, Honey Creek State Park, resort facilities, and golf.
Make the Most of a Lake Rathbun Day
Use calmer morning periods for open water and exposed golf holes. Reservoir storms can arrive with strong gusts, while prolonged rain affects campsites, beaches, and shoreline access.
Weather Tips for Lake Rathbun
- For Lake Rathbun, check temperature, wind, rain timing, and thunderstorm potential before choosing the day’s route.
- Wind, waves, current, water temperature, and lightning should guide water plans more than sunshine alone.
- Check overnight lows, wet ground, drainage, and the nearest substantial shelter before settling into camp.
- Build shade, hydration, and an indoor or sheltered backup into summer event plans.
Nearby Towns and Areas
This page can also be useful when planning outdoor time near:
- Honey Creek State Park
- Honey Creek Resort
- Rathbun Marina
- Centerville
- Moravia
- Appanoose County
- Buck Creek
- Island View
Plan Around the Conditions
Use the forecast to choose the best version of a Lake Rathbun 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 Lake Rathbun
Lake Rathbun Weather by Season
Winter
Winter at Lake Rathbun brings cold, wind chill, snow, and freeze-thaw ice. Lake or river ice should never be judged from air temperature alone; use local access guidance. Check road and facility status before a long drive.
Spring
Spring around Lake Rathbun is changeable, with rain, muddy surfaces, rising waterways, and severe thunderstorms. Verify current, levels, ramps, and launch conditions before putting on the water. Lightning, hail, and strong wind can arrive well ahead of a rain core.
Summer
Summer days at Lake Rathbun are often warm and humid, with strong sun, mosquitoes, and afternoon thunderstorm potential. Morning commonly offers calmer water and a larger margin before storms. Ventilate tents and keep a dry shelter plan for overnight storms.
Fall
Fall is often one of the most comfortable seasons at Lake Rathbun, with lower humidity, cooler nights, and changing color. Water cools faster than the air, so paddlers and boaters should dress for immersion risk. Watch for harvest traffic on rural roads and hunting activity near public lands.
Key Climate Data Points
- Annual average temperature: around 49–53°F depending on latitude based on the surrounding Iowa region.
- Annual snowfall: generally 20–40 inches, increasing toward northeast Iowa, 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: late May through September for water activities, with fall strong for trails.