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I-40 California Road Conditions
Radar and live pavement conditions on the 155 miles of I-40 in California — plus closures, road work and city-by-city weather across the state.
Updated Sep 10, 2026 6:33 PM PDT · Mostly dry
Lowest 97°F near Barstow, California · Highest wind 16 mph near Barstow, California
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I-40 runs 155 miles across California.
- Interstate: I-40
- State: California
- Length in state: 155 mi
Weather data from Sep 10, 2026 6:33 PM PDT
97°F
112°F
16 mph
29.62-29.66 inHg
Current I-40 in California Conditions by State
I-40 crosses 155 miles of California, from the Arizona line to its end in the state. That is 6% of I-40's 2,555 miles.
Inside California it meets I-15 at Barstow.
No full closures are reported on I-40 in California as of Sep 10, 2026 6:33 PM PDT, and no lane closures or roadworks either. Always check with the responsible state DOT before setting off.
Towns Along I-40 in California
From Barstow to Needles, with the position of each town measured along this stretch itself — counted from the Barstow end, not from a state milepost, so it will not match the numbers on the signs.
- 0 mi Barstow 2.2 mi off the road
- 143 mi Needles 1.8 mi off the road
Places from the US Census Gazetteer and population estimates, both public domain; distances measured along this page's own route geometry.
Summaries fetched Sep 10, 2026 5:00 AM PDT
Barstow, CA weather
- In Barstow, CA, the current weather conditions indicate a temperature of 80°F with a dew point of 57.6°F, resulting in a relative humidity of 46%
- The atmospheric pressure is measured at 29.9 inHg
- Winds are coming from the west at 6 to 9 mph
- The visibility is good at 9.9 miles, and the weather is mostly clear at this time
- There are no active weather alerts, and the probability of precipitation is 0%.
I-40 in California Road Weather FAQ
- Is Interstate 40 in California closed right now?
- No full closures are reported on I-40 in California. No lane closures or roadworks are reported either.
- What are I-40 in California road conditions today?
- The map on this page colors the route along I-40 in California by what is on the pavement right now — dry, wet, slush, snow or ice — from radar and surface data, last updated Sep 10, 2026 6:33 PM PDT. Right now temperatures run from 97°F to 112°F and the strongest wind is 16 mph.
- How often are I-40 in California 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.
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