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Highway Travel Weather

Interstate 15 – Montana to California

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Dec 1, 2025 - Mon
Great Falls, United States
overcast clouds
35°F overcast clouds
Wind 23 mph, SW
Humidity 56%
Pressure 1.01 bar
Day Cond. Temp. Wind Humidity PressurePres.
mon dec 1
overcast clouds
 26/27°F 18 mph, SW 63% 1.01 bar
tue dec 2
snow
 30/22°F 14 mph, SW 97% 1.02 bar
wed dec 3
light snow
 26/18°F 8 mph, SW 84% 1.02 bar
thu dec 4
overcast clouds
 28/19°F 8 mph, WSW 85% 1.02 bar
fri dec 5
snow
 25/29°F 5 mph, SW 87% 1.02 bar
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Dec 1, 2025 - Mon
Butte, United States
overcast clouds
28°F overcast clouds
Wind 5 mph, NW
Humidity 54%
Pressure 1.02 bar
Day Cond. Temp. Wind Humidity PressurePres.
mon dec 1
overcast clouds
 21/23°F 6 mph, SW 72% 1.02 bar
tue dec 2
light snow
 28/14°F 7 mph, NW 84% 1.02 bar
wed dec 3
sky is clear
 26/10°F 3 mph, SW 74% 1.02 bar
thu dec 4
overcast clouds
 28/17°F 5 mph, W 78% 1.02 bar
fri dec 5
snow
 32/34°F 23 mph, W 86% 1.01 bar
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Dec 1, 2025 - Mon
Idaho Falls, United States
overcast clouds
30°F overcast clouds
Wind 3 mph, NNW
Humidity 75%
Pressure 1.02 bar
Day Cond. Temp. Wind Humidity PressurePres.
mon dec 1
overcast clouds
 32/30°F 12 mph, SW 76% 1.02 bar
tue dec 2
light snow
 33/29°F 11 mph, SSW 65% 1.02 bar
wed dec 3
sky is clear
 33/31°F 10 mph, SSW 49% 1.03 bar
thu dec 4
overcast clouds
 35/34°F 15 mph, SW 56% 1.02 bar
fri dec 5
rain and snow
 34/43°F 27 mph, WSW 97% 1.02 bar
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Dec 1, 2025 - Mon
Salt Lake City, United States
broken clouds
33°F broken clouds
Wind 7 mph, N
Humidity 74%
Pressure 1.03 bar
Day Cond. Temp. Wind Humidity PressurePres.
mon dec 1
sky is clear
 37/34°F 6 mph, SSE 68% 1.03 bar
tue dec 2
snow
 42/36°F 8 mph, SSE 54% 1.02 bar
wed dec 3
snow
 38/33°F 6 mph, WNW 74% 1.02 bar
thu dec 4
scattered clouds
 39/35°F 6 mph, SSW 67% 1.03 bar
fri dec 5
rain and snow
 37/39°F 7 mph, S 83% 1.02 bar
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Dec 1, 2025 - Mon
Las Vegas, United States
clear sky
53°F clear sky
Wind 7 mph, E
Humidity 30%
Pressure 1.02 bar
Day Cond. Temp. Wind Humidity PressurePres.
mon dec 1
overcast clouds
 52/48°F 8 mph, NNW 29% 1.02 bar
tue dec 2
overcast clouds
 52/47°F 6 mph, SSE 23% 1.02 bar
wed dec 3
sky is clear
 58/49°F 17 mph, N 25% 1.02 bar
thu dec 4
sky is clear
 52/48°F 5 mph, NNW 34% 1.03 bar
fri dec 5
sky is clear
 53/51°F 4 mph, SE 27% 1.02 bar
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Dec 1, 2025 - Mon
San Bernardino, United States
clear sky
62°F clear sky
Wind 9 mph, NNW
Humidity 33%
Pressure 1.02 bar
Day Cond. Temp. Wind Humidity PressurePres.
mon dec 1
sky is clear
 66/53°F 8 mph, NNW 25% 1.02 bar
tue dec 2
sky is clear
 66/53°F 5 mph, NNE 18% 1.02 bar
wed dec 3
sky is clear
 63/53°F 8 mph, NNE 37% 1.02 bar
thu dec 4
sky is clear
 63/53°F 8 mph, NNE 20% 1.02 bar
fri dec 5
sky is clear
 64/57°F 6 mph, NNE 17% 1.02 bar
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Dec 1, 2025 - Mon
San Diego, United States
haze
60°F haze
Wind 6 mph, WSW
Humidity 81%
Pressure 1.02 bar
Day Cond. Temp. Wind Humidity PressurePres.
mon dec 1
sky is clear
 64/61°F 7 mph, WSW 57% 1.02 bar
tue dec 2
broken clouds
 65/61°F 7 mph, WSW 44% 1.02 bar
wed dec 3
light rain
 63/60°F 7 mph, W 65% 1.02 bar
thu dec 4
sky is clear
 65/63°F 10 mph, WNW 31% 1.02 bar
fri dec 5
few clouds
 65/63°F 6 mph, WNW 20% 1.02 bar