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Radar, DOT cameras and live pavement conditions on the 797 miles of I-5 in California — plus closures, road work and city-by-city weather across the state.
Updated Sep 14, 2026 7:31 PM PDT · Mostly dry
Lowest 68°F near Los Angeles, California · Highest wind 12 mph near Los Angeles, California
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Interstate 5 runs 797 miles up California, from the Mexican border at San Ysidro to the Oregon line beyond Yreka — more than half of the entire route, and the state’s main north–south artery. It crosses Tejon Pass at 4,144 feet on the Grapevine, runs the length of a Central Valley that fills with tule fog in winter, and climbs into the mountains again north of Redding.
Weather data from Sep 14, 2026 7:31 PM PDT
Dry
I-5 crosses 797 miles of California, from the Oregon line to its end in the state. That is 58% of I-5's 1,381 miles.
Inside California it meets I-10 at Los Angeles, and I-80 at Sacramento.
By mile marker, I-5 passes San Diego 16 · Los Angeles 134 · Sacramento 519.
It carries The Grapevine at 4,144 ft, where the weather at the summit is not the weather on the approach.
2 current reports along the route, including 2 full closures. The 1 most serious are listed below. Always check with the responsible state DOT before setting off.
Mainline closure. Work: Accident Investigation. Lanes closed: All. Near Pacoima, Los Angeles County.
| Place | Snow a year | Snow days | Freezing nights | Freeze–thaw days | First freeze | Last freeze | Days over 90°F |
|---|---|---|---|---|---|---|---|
| San Diego | 0" | 0 | 0 | 0 | — | — | 1.2 |
| Sacramento | 0" | 0 | 5.1 | 5.1 | Dec 18 | Jan 19 | 74.4 |
| Los Angeles | 0" | 0 | 0 | 0 | — | — | 2.5 |
NOAA 1991–2020 Climate Normals, from 3 weather stations in California. A dash is a figure that station does not report, not a zero.
Every figure above is a town or a city. The summits are a different climate: Cajon Pass, Donner Pass (Donner Summit, I-80), The Grapevine (Tejon Pass, I-5) have its own page with the readings at the top and a six-day summit forecast.
From Imperial Beach to Montague, with the position of each town measured along this stretch itself — counted from the Imperial Beach end, not from a state milepost, so it will not match the numbers on the signs.
Places from the US Census Gazetteer and population estimates, both public domain; distances measured along this page's own route geometry.
Summaries fetched Sep 14, 2026 5:01 AM PDT
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Weather Navigation carries the same radar and road-surface data on Apple CarPlay and Android Auto, with a weather-aware route planner, storm-cell tracking and radar that refreshes every two minutes over the US.