How often does I-80 close in Wyoming?

Dozens of times each winter, most often between Laramie and Rawlins. Closures typically last a few hours to a day and are announced on WYDOT 511; this page shows active NWS warnings and forecast risk for each stretch.

Is there an alternate route?

Not a good one. US-30 parallels I-80 west of Laramie and closes under the same conditions. If a closure is likely, the honest answer is to wait it out in Cheyenne or Rock Springs.

I-80 · WY

I-80 across Wyoming: road conditions right now

Cheyenne, WY to Evanston, WY

The 400 miles of I-80 between Cheyenne and Evanston run at 6,000 to 8,600 feet across open high plains. Wind, blowing snow, and black ice close it more often than any other interstate in the country, usually between Laramie and Rawlins or at Elk Mountain.

Checking the forecast, NWS alerts, and DOT feeds for I-80 right now…

Why this stretch is hard in winter

Sherman Hill summit at 8,640 ft between Cheyenne and Laramie is the highest point on I-80.
The Laramie–Rawlins stretch past Elk Mountain gets sustained crosswinds over 50 mph; high-profile vehicles are routinely restricted.
Ground blizzards with clear skies overhead are common: the snow is blowing, not falling.
When WYDOT closes the gates, motels in Laramie, Rawlins, and Rock Springs fill within the hour.

What this page checks

Hourly forecast at every checkpoint for the time you would be there: temperature, precipitation type and rate, gusts, visibility.
Active National Weather Service watches, warnings, and advisories on the route.
Snow on the ground (NOAA SNODAS) and the Weather Prediction Center winter impact outlook.
Pavement temperature and surface state from state DOT road sensors, when you are leaving within a few hours.
Chain controls, closures, and winter road condition reports from state DOT feeds where they are published openly.
Seasonal closures of mountain roads the router might otherwise use.

Official sources for this corridor

Questions drivers ask about I-80

How often does I-80 close in Wyoming?: Dozens of times each winter, most often between Laramie and Rawlins. Closures typically last a few hours to a day and are announced on WYDOT 511; this page shows active NWS warnings and forecast risk for each stretch.
Is there an alternate route?: Not a good one. US-30 parallels I-80 west of Laramie and closes under the same conditions. If a closure is likely, the honest answer is to wait it out in Cheyenne or Rock Springs.

Conditions change by the hour. This page is a planning aid built on public forecasts and DOT feeds; the road authority linked above has the final word on closures and chain requirements.

Other corridors: I-70 through the Colorado mountains · I-80 over Donner Pass · I-90 over Snoqualmie Pass · I-84 through the Blue Mountains · I-15 over Cajon Pass · I-90 across South Dakota · all corridors