US Highway Forecast: I-15
US Highway Forecast: I-15
The short-term forecasts below are for cities or towns located along the specified highway. Click on a city or town to see its current conditions as well as long-term forecast.
Short Term Forecast
| City |
Sunday 4pm |
Sunday 7pm |
Sunday 10pm |
|---|---|---|---|
| Sweetgrass, Montana |
 -12°C
Clear |
-13°C
Clear |
 -14°C
Mainly clear |
| Great Falls, Montana |
-8°C
Clear |
-14°C
Clear |
-14°C
Mainly clear |
| Helena, Montana |
-14°C
Mainly clear |
-17°C
Mainly clear |
-18°C
Mainly clear |
| Butte, Montana |
-8°C
Clear |
-14°C
Clear |
-19°C
Cloudy periods |
| Idaho Falls, Idaho |
 -8°C
Variable cloudiness |
-11°C
Variable cloudiness |
-13°C
Variable cloudiness |
| Salt Lake City, Utah |
 -5°C
Fog patches |
-8°C
Fog patches |
-8°C
Fog patches |
| Cedar City, Utah |
-2°C
Variable cloudiness |
-6°C
Variable cloudiness |
 -7°C
Cloudy with clear breaks |
| Las Vegas, Nevada |
10°C
Variable cloudiness |
7°C
Variable cloudiness |
5°C
Variable cloudiness |
| Barstow, California |
12°C
Variable cloudiness |
6°C
Variable cloudiness |
3°C
Cloudy with clear breaks |
| Ontario, California |
17°C
Variable cloudiness |
12°C
Variable cloudiness |
10°C
Cloudy with clear breaks |
| San Diego, California |
16°C
Variable cloudiness |
13°C
Variable cloudiness |
12°C
Cloudy with clear breaks |
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