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I-15 in Montana Road Conditions
I-15 Road Conditions in Montana
Updated Aug 24, 2026 12:02 AM UTC · Mostly dry
Lowest 77°F near Helena, Montana · Highest wind 27 mph near Great Falls, Montana
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I-15 runs 396 miles across Montana. It passes Helena and Great Falls.
- Interstate: I-15
- State: Montana
- Length in state: 396 mi
Weather data from Aug 24, 2026 12:02 AM UTC
77°F
88°F
27 mph
1001-1005 hPa
Current I-15 in Montana Conditions by State
Montana I-15 in Montana road conditions
Dry
- Helena 88°F · 17 mph wind · Dry
- Great Falls 88°F · 25 mph wind · Dry
See live road conditions and weather for I-15 in Montana. Real-time surface conditions, radar, closures and DOT cameras on the interactive map for the Montana stretch of I-15.
Forecasts are generated for the next 6 hours at points along the route and include temperature and conditions such as clear skies, rain, storms, snow, high wind, hail, and more. mdt511.com is Montana's official traveller-information service for closures and restrictions on this road; this map shows the weather alongside it.
No full closures are reported on I-15 in Montana as of Aug 24, 2026 12:02 AM UTC, and no lane closures or roadworks either. Always check with the responsible state DOT before setting off.
Great Falls, MT weather
- In Great Falls, MT, the current weather conditions indicate a temperature of 18.7°C (65.7°F) with a clear sky
- The humidity level is at 63%, and the dew point is 11.5°C (52.7°F)
- Winds are blowing from the southwest at 20 km/h (12 mph)
- The pressure is measured at 1009 mb (29.8 inHg), suggesting stable atmospheric conditions
- There is a slight risk of severe thunderstorms in the area, which may impact outdoor activities, although no active alerts have been issued
- Visibility is good at 16.1 km (10.0 miles)
- As of the current time, 6:04 AM on August 23, 2026, the weather remains calm but keep an eye on potential developments throughout the day.
I-15 in Montana Road Weather FAQ
- Is I-15 in Montana closed right now?
- No full closures are reported on I-15 in Montana. No lane closures or roadworks are reported either.
- What are I-15 in Montana road conditions today?
- The map on this page colours the route along I-15 in Montana by what is on the carriageway right now — dry, wet, slush, snow or ice — from radar and surface data, last updated Aug 24, 2026 12:02 AM UTC. Right now temperatures run from 77°F to 88°F and the strongest wind is 27 mph.
- How often are I-15 in Montana 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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