I-15 Interstate Road Conditions 511

I-15

Weather for road I-15

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Interstate 15 (I‑15) runs from San Diego, California, to Sweet Grass, Montana at the Canadian border, forming a major north–south corridor through the western United States. It passes through cities such as San Diego, Las Vegas, St. George, Provo, Salt Lake City, Pocatello, Idaho Falls, Butte, Helena, and Great Falls.

  • Road system: Interstate Highway System
  • Year of construction: 1957
  • Length: 1,433 miles

Temperature

Wind Speed

Rain Precip.

Coverage

Up to 144 hours

Lowest temp.

-

Highest temp.

-

Highest wind

-

Pressure

-

Description

See live weather forecast for I‑15. Get real‑time I‑15 road and weather conditions displayed directly on the interactive map for your route through California, Nevada, Arizona, Utah, Idaho, and Montana. The map shows live weather conditions along Interstate 15, updated frequently to help drivers plan safer trips. Forecasts are generated for the next 6 hours at key highway points and include temperature and conditions such as clear skies, rain, storms, snow, high wind, hail, and more.

Weather conditions overview along the road I-15

Arizona I-15 weather conditions

  • The current weather in Arizona, AZ, as of June 13, 2026, at 5:00 AM shows a temperature of 18.2°C (64.8°F) with a relative humidity of 51%
  • The wind is coming from the east-southeast at 6 km/h (4 mph)
  • The sky is partly cloudy, with visibility at 16 km (9.9 miles)
  • There are no significant weather alerts or precipitation currently observed
  • The atmospheric pressure is at 1011 mb (29.83 inHg)
  • Overall, conditions are mild and comfortable for outdoor activities.

California I-15 weather conditions

  • California, CA is currently experiencing clear weather conditions with a temperature of 21.5°C (70.7°F)
  • The humidity level is at 59%, and the wind is calm, blowing from the east at 1.3 kph (0.8 mph)
  • Visibility is good at 16 km (9.9 miles)
  • A heat advisory is in effect from June 13, 2026, at 2:43 AM until June 16, 2026, at 11:00 PM, indicating a need for caution due to elevated temperatures expected during this period
  • There are no significant weather impacts reported that would affect outdoor activities at this time.

Idaho I-15 weather conditions

  • The current weather in Idaho, ID, shows a temperature of 8.7°C (47.7°F) with a dew point of -2.4°C (27.7°F)
  • Humidity is at 46%, and the atmospheric pressure is 1017 mb (30.06 inHg)
  • Winds are coming from the northwest at 2.2 KPH (1.4 mph), providing a calm breeze
  • Visibility is good at 16.1 km (10.0 miles), and the weather is sunny
  • There are no significant weather alerts at this time.

Montana I-15 weather conditions

  • Current weather conditions in Montana, MT, indicate a temperature of 5.3°C (41.5°F) with a feels-like temperature of 4.3°C (39.7°F)
  • The dew point is at 4.2°C (39.6°F), and humidity levels are high at 92%
  • The atmospheric pressure is measured at 1025 mb (30.3 inHg)
  • Winds are coming from the northwest at a speed of 10 kph (6 mph)
  • The sky is mostly cloudy, with an estimated cloud coverage of 75%
  • Visibility is good at 16.1 km (10.0 miles)
  • There are no active weather alerts at this time.

Nevada I-15 weather conditions

  • In Nevada, NV, the current weather is clear with a temperature of 13.6°C (56.5°F) and a dew point of -9.4°C (15.1°F)
  • The humidity level is at 19%, indicating very dry conditions
  • The wind is blowing from the east-southeast at 11.7 kph (7.3 mph)
  • The atmospheric pressure is measured at 1013 mb (29.9 inHg), and visibility is good at 16 km (9.9 miles)
  • There are no active weather alerts at this time, and no precipitation has been recorded
  • Overall, it is a calm and clear morning in the area.

Utah I-15 weather conditions

  • Currently in Utah, the weather is clear and sunny with a temperature of 9.8°C (49°F) and a dew point of -2.2°C (28°F)
  • The humidity is at 43%, providing a comfortable atmosphere
  • Winds are light, blowing from the southeast at approximately 2 km/h (1 mph)
  • The pressure is measured at 1017 mb (30.06 inHg), indicating stable conditions
  • Visibility is good, reaching up to 16.1 km (10 miles)
  • There are no active weather alerts at this time, and the probability of precipitation is 0%.

Cameras for road I-15

IDOT: 187th. HD

4 months ago

Photo from camera: IDOT: 187th. HD

IDOT: Harlem Ave. HD

4 months ago

Photo from camera: IDOT: Harlem Ave. HD

IDOT: W/o LaGrange Rd. HD

4 months ago

Photo from camera: IDOT: W/o LaGrange Rd. HD

IDOT: E/o 104th Ave. HD

4 months ago

Photo from camera: IDOT: E/o 104th Ave. HD

IDOT: Wolf Rd. HD

4 months ago

Photo from camera: IDOT: Wolf Rd. HD

IDOT: Near Wt. Station HD

4 months ago

Photo from camera: IDOT: Near Wt. Station HD

IDOT: Parker Rd. HD

4 months ago

Photo from camera: IDOT: Parker Rd. HD

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