I-5 Road Conditions & Weather

I-5 runs 1,381 miles south to north from San Diego, California to Blaine, Washington, crossing 3 states. Its longest stretch is 797 miles across California; its shortest is 276 miles in Washington.

It climbs The Grapevine at 4,144 ft and Siskiyou Summit at 4,310 ft, where the weather at the summit is not the weather on the approach.

Mile markers count from each state's southern line and start again at the next one, which is how most states number their exits as well. They are measured along the same road geometry these pages draw, so they land within a mile or two of the posted markers. A toll road that runs its own continuous numbering is the exception — on the New York Thruway the posts continue from New York City — and there the figure is how far into the state the place is rather than the number on the sign. Distances are measured state by state, never across a gap.

12 current reports along the route, including 1 full closure. The 7 most serious are listed below. Always check with the responsible state DOT before setting off.

• Road closed

  I-5 closed

  Mainline closure. Work: Accident Investigation. Lanes closed: All. Near Pacoima, Los Angeles County.

  Pacoima • South • CA • Ongoing

• Lanes blocked

  I-5 on ramp closure

  On Ramp closure. Work: Striping Operation. Lanes closed: All. Estimated delay: 5 min. Near Zamora, Yolo County.

  Zamora • South • CA • Until Oct 9, 1:59 PM

• Lanes blocked

  I-5 conventional hwy closure (lanes 1, 2)

  Conventional Hwy closure. Work: Bridge Work. Lanes closed: 1, 2. Near Lakehead, Shasta County.

  Lakehead • North / South • CA • Until Oct 12, 7:01 PM

• Lanes blocked

  I-5 mainline closure (lanes 1, 2)

  Mainline closure. Work: Striping Operation. Lanes closed: 1, 2. Estimated delay: 5 min. Near Woodland, Yolo County.

  Woodland • North • CA • Until Oct 9, 1:59 PM

• Lanes blocked

  I-5 mainline closure (lanes LShoulder, 1, 2, RShoulder)

  Mainline closure. Work: AC Paving. Lanes closed: LShoulder, 1, 2, RShoulder. Near West Sacramento, Yolo County.

  West Sacramento • North • CA • Until Oct 9, 11:30 AM

• Lanes blocked

  I-5 off ramp closure

  Off Ramp closure. Work: Striping Operation. Lanes closed: All. Estimated delay: 5 min. Near Zamora, Yolo County.

  Zamora • North • CA • Until Oct 9, 1:59 PM

• Lanes blocked

  I-5 conventional hwy closure (lanes 2)

  Conventional Hwy closure. Work: Bridge Inspection. Lanes closed: 2. Near Lakehead, Shasta County.

  Lakehead • North / South • CA • Until Oct 9, 10:01 PM

Related Roads

I-5 Road Weather FAQ

Is I-5 closed right now?

Yes — one full closure is reported on I-5 as of Oct 9, 2026 3:17 AM UTC. 11 lane closures, roadworks or restrictions are in force. They are listed under closures and road blocks on this page.

What are I-5 road conditions today?

The map on this page colors the route along I-5 by what is on the pavement right now — dry, wet, slush, snow or ice — from radar and surface data, last updated Oct 9, 2026 3:15 AM UTC. Right now temperatures run from 58°F to 91°F and the strongest wind is 8 mph.

How long is Interstate 5, and which states does it cross?

I-5 runs 1,381 miles south to north, from San Diego, California to Blaine, Washington, through 3 states: California, Oregon and Washington. The longest stretch is 797 miles across California. Mile markers restart at each state line, so San Diego is around mile 16 in California.

Are there mountain passes on I-5?

Yes — 2 on this site: The Grapevine at 4,144 ft and Siskiyou Summit at 4,310 ft. Each has its own summit page.

Are there live traffic cameras on I-5?

Yes. This page shows 6 live views on I-5 from the state transportation departments' own camera feeds, further down the page, refreshed each time you load it.

How often are I-5 road conditions updated?

The road surface and weather layers are rebuilt whenever this page is opened with data more than ten minutes old, and refreshed on a schedule in between, so nothing here is more than about two hours old even on a road nobody has looked at. Closures and road blocks are re-imported from the state 511 feeds every fifteen minutes, and the written state-by-state summaries are refreshed daily. Every section on this page carries the time its data was fetched.