Siskiyou Summit Weather & Road Conditions

No full closures are reported on Siskiyou Summit as of Sep 14, 2026 7:40 PM PDT, and no lane closures or roadworks either. Always check with the responsible state DOT before setting off.

Siskiyou Summit Chain Control & Traction Requirements

Chain and traction requirements on Siskiyou Summit are set by the state highway authority, and they are imposed and lifted through the day as a storm moves through. This page does not carry them — check tripcheck.com ↗ before you set off.

What this page can tell you is the surface at the summit, from radar and surface analysis: currently dry, with the road surface estimated at 57°F. The road surface figure is an estimate derived from air temperature, not a measurement — bridges and overpasses run colder than the number shown.

Siskiyou Summit Weather Forecast: Next 6 Days

At the summit, 4,310 ft. Each day shows its warmest and coldest hour, and the worst driving conditions forecast anywhere in it — not the average, because the hour that closes a pass is the one worth knowing about.

1. Rest of today Sep 14

   

   55°F 49°F

   Dry

   Wind to 7 mph

2. Tue Sep 15

   

   81°F 45°F

   Dry

   Wind to 9 mph

3. Wed Sep 16

   

   88°F 46°F

   Dry

   Wind to 7 mph

4. Thu Sep 17

   

   81°F 50°F

   Dry

   Wind to 7 mph

5. Fri Sep 18

   

   88°F 46°F

   Moist

   Wind to 7 mph

6. Sat Sep 19

   

   84°F 48°F

   Dry

   Wind to 7 mph

Forecast, not a measurement — from the same weather service that draws this page's radar and road colors, model run 9 hours ago. Days run on Pacific time, the clock the pass keeps — not the reader's.

Related Roads

Siskiyou Summit Road Weather FAQ

Is Siskiyou Summit open right now?

No full closures are reported on Siskiyou Summit. No lane closures or roadworks are reported either.

What are Siskiyou Summit road conditions today?

The map on this page colors the route along Siskiyou Summit by what is on the pavement right now — dry, wet, slush, snow or ice — from radar and surface data, last updated Sep 14, 2026 7:40 PM PDT. Right now temperatures run from 54°F to 79°F and the strongest wind is 10 mph.

Do I need chains on Siskiyou Summit today?

Chain and traction requirements are set by the state highway authority and change through the day, so check them directly before you set off at tripcheck.com. This page does not carry them. What this page can tell you is that the surface at the summit is dry, and the road surface is estimated at 57°F.

What is the weather forecast for Siskiyou Summit this week?

At the summit, Sep 14 to Sep 19: highs 55-88°F, lows 45-50°F. No snow or ice is forecast on the road in that time. It is a forecast rather than a measurement, and the later days are less certain than the earlier ones.

Are there live traffic cameras on Siskiyou Summit?

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

How often are Siskiyou Summit 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.