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Alpine, MT Weather Forecast | 10 Days

Updated: Mon Oct 19th 2026 1:45 AM MDT

Mon, 10-19

50°F
41°F

Tue, 10-20

45°F
38°F

Wed, 10-21

49°F
42°F

Thu, 10-22

51°F
46°F

Fri, 10-23

47°F
25°F

Sat, 10-24

28°F
16°F

Sun, 10-25

36°F
26°F

Mon, 10-26

34°F
16°F

Tue, 10-27

18°F
7°F

Wed, 10-28

34°F
18°F

Sunny

Mon 10-19

Sunny with a high of 50°F and a low of 41°F. There's a very small chance of rainfall, only about 1%. Wind will be moderate, blowing around 12mph on average and gusts of 19.9mph at 8 PM. Humidity levels should be comfortable, sitting around 38% on average, the maximum being 48% at 7 AM and 25% being its lowest at 1 PM. Barometric pressure is its highest of 30.09^inHg at 2 AM, a lowest point of 29.91^inHg at 5 PM with an avg 30.01^inHg.

HI: 50°F
LO: 41°F

Rain: 1%
Snow: 0%

Wind
11.9 mph
Humidity
38% avg.

UV Index
3.7
Air Quality
Good

Sunrise
07:39 AM
Sunset
06:27 PM

Moonrise
03:50 PM
Moonset
12:41 AM
Moon Phase
First Quarter

Hourly

Overcast

Tue 10-20

Overcast with a high of 45°F and a low of 38°F. There's a moderate 36% chance of rainfall with an estimated 0.01in. Wind will be moderate, blowing around 11mph on average and gusts of 17mph at 11 PM. Humidity levels should be comfortable, sitting around 57% on average, the maximum being 72% at 7 PM and 43% being its lowest at 12 AM. Barometric pressure is its highest of 30.15^inHg at 11 PM, a lowest point of 30.02^inHg at 2 PM with an avg 30.06^inHg.

HI: 45°F
LO: 38°F

Rain: 36% | est. 0.01in
Snow: 0%

Wind
10.3 mph
Humidity
57% avg.

UV Index
3.4
Air Quality
Good

Sunrise
07:41 AM
Sunset
06:25 PM

Moonrise
04:10 PM
Moonset
01:47 AM
Moon Phase
Waxing Gibbous

Hourly

Sunny

Wed 10-21

Sunny with a high of 49°F and a low of 42°F. There's a very small chance of rainfall, only about 7%. Winds will be light at 10mph and gusts of 18.8mph at 7 PM. Humidity levels should be comfortable, sitting around 58% on average, the maximum being 67% at 3 AM and 41% being its lowest at 5 PM. Barometric pressure is its highest of 30.14^inHg at 12 AM, a lowest point of 29.97^inHg at 4 PM with an avg 30.06^inHg.

HI: 49°F
LO: 42°F

Rain: 7%
Snow: 0%

Wind
9.6 mph
Humidity
58% avg.

UV Index
3.4
Air Quality
Good

Sunrise
07:42 AM
Sunset
06:23 PM

Moonrise
04:28 PM
Moonset
02:52 AM
Moon Phase
Waxing Gibbous

Hourly

Sunny

Thu 10-22

Sunny with a high of 51°F and a low of 46°F. There's a very small chance of rainfall, only about 5%. Winds will be light at 9mph and gusts of 19.2mph at 1 AM. Humidity levels should be comfortable, sitting around 51% on average, the maximum being 64% at 2 AM and 34% being its lowest at 1 PM. Barometric pressure is its highest of 30.04^inHg at 1 AM, a lowest point of 29.71^inHg at 11 PM with an avg 29.87^inHg.

HI: 51°F
LO: 46°F

Rain: 5%
Snow: 0%

Wind
8.1 mph
Humidity
51% avg.

UV Index
3.4
Air Quality
Good

Sunrise
07:43 AM
Sunset
06:22 PM

Moonrise
04:44 PM
Moonset
03:57 AM
Moon Phase
Waxing Gibbous

Hourly

Heavy Snow

Fri 10-23

Heavy Snow with a high of 47°F and a low of 25°F. It will likey rain, having a 89% chance of a downpour with an estimated 0.43in. Snow is likely with a 89% chance with an estimated 3.1in. Wind will be moderate, blowing around 13mph on average and gusts of 18.1mph at 9 AM. High humidity with average of 84% is anticipated, the maximum being 93% at 8 AM and 59% being its lowest at 12 AM. Barometric pressure is its highest of 30.09^inHg at 11 PM, a lowest point of 29.64^inHg at 4 AM with an avg 29.77^inHg.

HI: 47°F
LO: 25°F

Rain: 89% | est. 0.43in
Snow: 89% | est. 3.1in

Wind
12.8 mph
Humidity
84% avg.

UV Index
1
Air Quality
Good

Sunrise
07:45 AM
Sunset
06:20 PM

Moonrise
05:01 PM
Moonset
05:02 AM
Moon Phase
Full Moon

Hourly

Partly Cloudy

Sat 10-24

Partly Cloudy with a high of 28°F and a low of 16°F. There's a moderate 43% chance of rainfall with an estimated 0.02in. Snow is likely with a 64% chance with an estimated 0.1in. Wind will be moderate, blowing around 17mph on average and gusts of 19.7mph at 11 PM. The humidity will be on the higher side, averaging about 77%, the maximum being 88% at 5 AM and 61% being its lowest at 3 PM. Barometric pressure is its highest of 30.45^inHg at 9 PM, a lowest point of 30.12^inHg at 12 AM with an avg 30.3^inHg.

HI: 28°F
LO: 16°F

Rain: 43% | est. 0.02in
Snow: 64% | est. 0.1in

Wind
16.8 mph
Humidity
77% avg.

UV Index
2
Air Quality
TBA

Sunrise
07:46 AM
Sunset
06:18 PM

Moonrise
05:19 PM
Moonset
06:09 AM
Moon Phase
Full Moon

Hourly

Sunny

Sun 10-25

Sunny with a high of 36°F and a low of 26°F. There's a very small chance of rainfall, only about 6%. Snow is likely with a 16% chance. Wind will be moderate, blowing around 18mph on average and gusts of 21.9mph at 9 AM. Humidity levels should be comfortable, sitting around 59% on average, the maximum being 80% at 12 AM and 45% being its lowest at 12 PM. Barometric pressure is its highest of 30.44^inHg at 12 AM, a lowest point of 30.1^inHg at 3 PM with an avg 30.24^inHg.

HI: 36°F
LO: 26°F

Rain: 6%
Snow: 16%

Wind
17.9 mph
Humidity
59% avg.

UV Index
2
Air Quality
TBA

Sunrise
07:47 AM
Sunset
06:17 PM

Moonrise
05:40 PM
Moonset
07:19 AM
Moon Phase
Full Moon

Hourly

Sunny

Mon 10-26

Sunny with a high of 34°F and a low of 16°F. There's a moderate 41% chance of rainfall with an estimated 0.02in. Snow is likely with a 64% chance with an estimated 0.1in. Wind will be moderate, blowing around 11mph on average and gusts of 17mph at 6 AM. The humidity will be on the higher side, averaging about 76%, the maximum being 96% at 9 PM and 59% being its lowest at 12 AM. Barometric pressure is its highest of 30.32^inHg at 11 PM, a lowest point of 30.06^inHg at 3 PM with an avg 30.2^inHg.

HI: 34°F
LO: 16°F

Rain: 41% | est. 0.02in
Snow: 64% | est. 0.1in

Wind
11 mph
Humidity
76% avg.

UV Index
2
Air Quality
TBA

Sunrise
07:49 AM
Sunset
06:15 PM

Moonrise
06:05 PM
Moonset
08:31 AM
Moon Phase
Full Moon

Hourly

Light Snow

Tue 10-27

Light Snow with a high of 18°F and a low of 7°F. It will likey rain, having a 84% chance of a downpour with an estimated 0.14in. Snow is likely with a 91% chance with an estimated 1in. Winds will be light at 7mph and gusts of 17.9mph at 3 PM. High humidity with average of 90% is anticipated, the maximum being 99% at 6 PM and 80% being its lowest at 12 PM. Barometric pressure is its highest of 30.6^inHg at 9 AM, a lowest point of 30.35^inHg at 12 AM with an avg 30.52^inHg.

HI: 18°F
LO: 7°F

Rain: 84% | est. 0.14in
Snow: 91% | est. 1in

Wind
6.7 mph
Humidity
90% avg.

UV Index
1
Air Quality
TBA

Sunrise
07:50 AM
Sunset
06:14 PM

Moonrise
06:38 PM
Moonset
09:47 AM
Moon Phase
Waning Gibbous

Hourly

Sunny

Wed 10-28

Sunny with a high of 34°F and a low of 18°F. There's a very small chance of rainfall, only about 4%. Snow is likely with a 16% chance. Wind will be moderate, blowing around 15mph on average and gusts of 17.2mph at 3 AM. Humidity levels should be comfortable, sitting around 59% on average, the maximum being 80% at 12 AM and 41% being its lowest at 12 PM. Barometric pressure is its highest of 30.55^inHg at 12 AM, a lowest point of 30.01^inHg at 3 PM with an avg 30.23^inHg.

HI: 34°F
LO: 18°F

Rain: 4%
Snow: 16%

Wind
14.8 mph
Humidity
59% avg.

UV Index
2
Air Quality
TBA

Sunrise
07:52 AM
Sunset
06:12 PM

Moonrise
07:20 PM
Moonset
11:01 AM
Moon Phase
Waning Gibbous

Hourly

Currently

	43°F	30.09 inHg. Barometer 43% Humidity SSW 17.3 mph Wind
Clear

Full Report

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Extended Forecast
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