Lewis and Clark State Park, ND

Today’s Forecast:

Today’s Report:

About Lewis and Clark State Park

At Lewis and Clark State Park, trails and camps sit beside a large working reservoir. A protected campsite or cove can feel calm while open water builds difficult waves.

Planning an Outing at Lewis and Clark State Park

Use the upper-reservoir forecast and the park’s own notices; verify the launch, campsite loop, and return route rather than relying on conditions near town.

Weather Tips for Lewis and Clark State Park

• Large open water can build steep waves quickly; compare wind speed and direction with the intended shore and route.
• For winter travel, use current local ice reports and avoid pressure ridges, current, bridges, structures, and snow-hidden weak spots.
• Watch for severe thunderstorms, hail, smoke, and sudden wind shifts; keep a sheltered alternative available.
• Use the latest notice for Williston and the exact trailhead, ramp, campground, or facility you plan to use.

Nearby Towns and Areas

Use this forecast as practical context for outdoor plans near:

• Williston
• Epping
• Trenton
• Tobacco Gardens
• Little Muddy River
• Missouri-Yellowstone confluence
• Upper Lake Sakakawea

Adjust the Day to the Forecast

Move the start time or access point when it avoids peak heat, rough water, mud, or the strongest wind.

7-Day Forecast for Lewis and Clark State Park, ND

Weather by Season

Winter

Freeze-thaw cycles, severe wind chill, and drifting complicate trail and road travel. Do not treat a calm town forecast as proof that exposed terrain is ready. Check conditions near Williston because local access can change first.

Spring

Rapid warmups can accelerate runoff while cold fronts return snow and freezing rain. Check road surfaces and water levels close to departure. Check conditions near Epping because local access can change first.

Summer

Summer access is broad, yet heat index, bugs, ticks, algae notices, and sudden storms still shape the best destination. Start exposed travel early. Check conditions near Trenton because local access can change first.

Fall

Stable early-fall days are valuable, though wet leaves, smoke, frost, and rapid evening cooling affect trails and camps. Check conditions near Tobacco Gardens because local access can change first.

Key Climate Data Points

• Annual average temperature: roughly 42–45°F in the upper-reservoir region.
• Annual snowfall: commonly 30–45 inches, although wind redistributes snow and creates deep drifts beside exposed roads.
• Warmest months: July is usually warmest; exposed badlands and prairie heat faster than wooded or lakeshore settings.
• Coolest months: January is generally coldest, with wind chill often more important than air temperature.
• Wettest season: Late spring and early summer usually bring the most precipitation, including severe thunderstorms.
• Driest season: Winter is often driest by liquid precipitation, although drifting snow can dominate access.
• Best outdoor window: Late spring through early fall for warm-season activities; winter destinations require verified ice, snow, roads, and operations.