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I-15 Interstate Road Conditions 511
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
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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.
Arizona I-15 weather conditions
- Current weather conditions in Arizona, AZ indicate a temperature of 2.9°C (37°F) with a dew point of -3.8°C (25°F) and a humidity level of 61%
- The atmospheric pressure is 1017.3 mb (30.06 inHg)
- Winds are coming from the southeast at approximately 6 km/h (4 mph)
- Visibility is good at 16 km (9.9 miles), and the weather is clear
- There are no active weather alerts at this time.
California I-15 weather conditions
- Current weather conditions in California, CA indicate a clear sky with a temperature of 10.6°C (51°F) and a dew point of -0.4°C (31°F)
- The humidity is relatively low at 46%, and the atmospheric pressure is measured at 1016 mb (30.06 inHg)
- Winds are light, blowing from the southeast at 3.7 kph (2 mph)
- Visibility is good, reaching up to 16 km (9.9 miles)
- There are no weather alerts in effect at this time, and no precipitation is occurring.
Idaho I-15 weather conditions
- Current weather conditions in Idaho, ID indicate a temperature of -1.4°C (29°F) with a dew point of -8.6°C (16°F) and a humidity level of 58%
- The atmospheric pressure is measured at 1022 mb (30.18 inHg)
- Winds are calm, with speeds at 0 kph (0 mph) and no significant weather events impacting the area; visibility is clear at 16.1 km (10.0 miles)
- There are no active weather alerts at this time
- Overall, conditions are clear and cool, typical for early morning in May.
Montana I-15 weather conditions
- In Montana, MT, the current weather conditions indicate a temperature of 2.6°C (36.7°F) with a dew point of -2.2°C (28.0°F) and a relative humidity of 71%
- The atmospheric pressure is measured at 1021 mb (30.16 inHg)
- Winds are blowing from the south-southeast at 18 km/h (11 mph)
- The sky is mostly cloudy, covering approximately 60% of the sky
- Visibility is reported at 16.1 km (10.0 miles), indicating clear conditions for travel
- There are no active weather alerts at this time.
Nevada I-15 weather conditions
- Current weather conditions in Nevada, NV, indicate a temperature of -0.9°C (30°F) with a dew point of -14.2°C (6°F) and a humidity level of 36%
- The atmospheric pressure is measured at 1021 mb (30.15 inHg)
- Winds are coming from the southeast at 5 to 10 kph (3 to 6 mph)
- Visibility is good at 16 km (9.9 miles), and the weather is clear with no precipitation reported.
Utah I-15 weather conditions
- Current weather conditions in Utah, UT indicate a temperature of -0.9°C (30°F) with a dew point of -2.9°C (27°F) and a humidity level of 87%
- The pressure is measured at 1026.3 mb (30.3 inHg)
- Winds are coming from the east-southeast at a speed of approximately 5 km/h (3 mph)
- The sky is partly cloudy with visibility at 16.1 km (10.0 miles)
- There are no active weather alerts at this time, and no precipitation or snowfall has been recorded.
Cameras for road I-15
IDOT: 187th. HD
4 months ago
IDOT: Harlem Ave. HD
4 months ago
IDOT: W/o LaGrange Rd. HD
4 months ago
IDOT: E/o 104th Ave. HD
3 months ago
IDOT: Wolf Rd. HD
3 months ago
IDOT: Near Wt. Station HD
3 months ago
IDOT: Parker Rd. HD
3 months ago
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