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As of 23:29 MDT

Weather in Alta, MT

46°Current weather

Alta, Thursday, 8 October, 23:29

Overcast. Feels like 46°. High 70°, low 35°.

Pressure29.94 inHg
Wind2.3 mph S
Humidity56%
Visibility6.2 mi
Dew point31°
Fri, 0970° / 37°0Clear
70 °Clear

Alta, Friday, 9 October

Clear. High 70°, low 37°.

Pressure29.65 inHg
Wind9.8 mph SW
Humidity26%
Visibility6.2 mi
Dew point31°
Sat, 1046° / 33°0.43Snow
46 °Snow

Alta, Saturday, 10 October

Snow. High 46°, low 33°.

Pressure29.71 inHg
Wind1.9 mph N
Humidity96%
Visibility4.7 mi
Dew point39°
Sun, 1142° / 31°0.15Snow
42 °Snow

Alta, Sunday, 11 October

Snow. High 42°, low 31°.

Pressure29.88 inHg
Wind6.6 mph NE
Humidity90%
Visibility6.2 mi
Dew point27°
Mon, 1249° / 29°0.07Light snow
49 °Light snow

Alta, Monday, 12 October

Light snow. High 49°, low 29°.

Pressure29.97 inHg
Wind1.3 mph NE
Humidity74%
Visibility6.2 mi
Dew point28°
Tue, 1352° / 28°0Clear
52 °Clear

Alta, Tuesday, 13 October

Clear. High 52°, low 28°.

Pressure30.06 inHg
Wind2.6 mph NE
Humidity64%
Visibility—
Dew point33°
Wed, 1451° / 32°0.02Light rain
51 °Light rain

Alta, Wednesday, 14 October

Light rain. High 51°, low 32°.

Pressure30.03 inHg
Wind10.6 mph NW
Humidity53%
Visibility—
Dew point31°
Thu, 1541° / 30°0.21Snow
41 °Snow

Alta, Thursday, 15 October

Snow. High 41°, low 30°.

Pressure30.33 inHg
Wind7.8 mph NE
Humidity72%
Visibility—
Dew point32°
Fri, 1656° / 25°0Clear
56 °Clear

Alta, Friday, 16 October

Clear. High 56°, low 25°.

Pressure30.50 inHg
Wind3.7 mph SE
Humidity37%
Visibility—
Dew point18°
Sat, 1761° / 35°0Overcast
61 °Overcast

Alta, Saturday, 17 October

Overcast. High 61°, low 35°.

Pressure30.24 inHg
Wind4 mph S
Humidity25%
Visibility—
Dew point17°
Sun, 1864° / 37°0Clear
64 °Clear

Alta, Sunday, 18 October

Clear. High 64°, low 37°.

Pressure30.21 inHg
Wind3.2 mph SE
Humidity28%
Visibility—
Dew point22°
Mon, 1964° / 37°0Clear
64 °Clear

Alta, Monday, 19 October

Clear. High 64°, low 37°.

Pressure30.09 inHg
Wind6.1 mph W
Humidity27%
Visibility—
Dew point22°
Tue, 2063° / 38°0Clear
63 °Clear

Alta, Tuesday, 20 October

Clear. High 63°, low 38°.

Pressure30.03 inHg
Wind5.5 mph SW
Humidity28%
Visibility—
Dew point23°
Wed, 2160° / 39°0Clear
60 °Clear

Alta, Wednesday, 21 October

Clear. High 60°, low 39°.

Pressure30.15 inHg
Wind4.7 mph W
Humidity34%
Visibility—
Dew point27°
Thu, 2265° / 36°0Clear
65 °Clear

Alta, Thursday, 22 October

Clear. High 65°, low 36°.

Pressure30.21 inHg
Wind4.8 mph S
Humidity29%
Visibility—
Dew point23°
Fri, 2366° / 38°0Clear
66 °Clear

Alta, Friday, 23 October

Clear. High 66°, low 38°.

Pressure30.03 inHg
Wind6.8 mph SW
Humidity23%
Visibility—
Dew point19°

About the monthly outlook

How accurate is a 30-day forecast?

The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Alta, MT are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.

What does "above normal" mean?

We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.

Where do the 66-year records come from?

They are real temperature extremes recorded in Alta, MT since 1960: the highest and lowest reading for each calendar date, with the year it happened.

How often is it updated?

The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.