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As of 11:12 MDT

Weather in Big Sag, MT

32°Current weather

Big Sag, Sunday, 25 October, 11:12

Partly cloudy. Feels like 32°. High 36°, low 27°.

Pressure30.47 inHg
Wind1.4 mph NW
Humidity80%
Visibility—
Dew point28°
Mon, 2643° / 22°0Clear
43 °Clear

Big Sag, Monday, 26 October

Clear. High 43°, low 22°.

Pressure30.24 inHg
Wind0.5 mph NW
Humidity89%
Visibility6.2 mi
Dew point28°
Tue, 2751° / 31°0.01Light rain
51 °Light rain

Big Sag, Tuesday, 27 October

Light rain. High 51°, low 31°.

Pressure29.83 inHg
Wind16.8 mph SW
Humidity65%
Visibility6.2 mi
Dew point34°
Wed, 2853° / 39°0Clear
53 °Clear

Big Sag, Wednesday, 28 October

Clear. High 53°, low 39°.

Pressure29.91 inHg
Wind16 mph SW
Humidity46%
Visibility6.2 mi
Dew point28°
Thu, 2940° / 29°0Overcast
40 °Overcast

Big Sag, Thursday, 29 October

Overcast. High 40°, low 29°.

Pressure30.30 inHg
Wind9.9 mph SW
Humidity89%
Visibility—
Dew point31°
Fri, 3043° / 28°0Overcast
43 °Overcast

Big Sag, Friday, 30 October

Overcast. High 43°, low 28°.

Pressure30.18 inHg
Wind8.9 mph E
Humidity82%
Visibility—
Dew point31°
Sat, 3155° / 33°0Overcast
55 °Overcast

Big Sag, Saturday, 31 October

Overcast. High 55°, low 33°.

Pressure29.94 inHg
Wind4.8 mph SE
Humidity57%
Visibility—
Dew point33°
Sun, 0157° / 44°0.01Light rain
57 °Light rain

Big Sag, Sunday, 1 November

Light rain. High 57°, low 44°.

Pressure29.71 inHg
Wind6.7 mph S
Humidity47%
Visibility—
Dew point34°
Mon, 0243° / 35°0.58Snow
43 °Snow

Big Sag, Monday, 2 November

Snow. High 43°, low 35°.

Pressure29.91 inHg
Wind22 mph SW
Humidity100%
Visibility—
Dew point35°
Tue, 0350° / 37°0Clear
50 °Clear

Big Sag, Tuesday, 3 November

Clear. High 50°, low 37°.

Pressure30.06 inHg
Wind21.6 mph SW
Humidity51%
Visibility—
Dew point28°
Wed, 0454° / 41°0Overcast
54 °Overcast

Big Sag, Wednesday, 4 November

Overcast. High 54°, low 41°.

Pressure29.85 inHg
Wind7.4 mph S
Humidity42%
Visibility—
Dew point27°
Thu, 0556° / 40°0Overcast
56 °Overcast

Big Sag, Thursday, 5 November

Overcast. High 56°, low 40°.

Pressure29.80 inHg
Wind6.5 mph SE
Humidity41%
Visibility—
Dew point26°
Fri, 0657° / 47°0.02Light rain
57 °Light rain

Big Sag, Friday, 6 November

Light rain. High 57°, low 47°.

Pressure29.32 inHg
Wind16.1 mph SW
Humidity50%
Visibility—
Dew point36°
Sat, 0752° / 41°0.01Light rain
52 °Light rain

Big Sag, Saturday, 7 November

Light rain. High 52°, low 41°.

Pressure29.59 inHg
Wind22.7 mph SW
Humidity50%
Visibility—
Dew point31°
Sun, 0855° / 40°0Overcast
55 °Overcast

Big Sag, Sunday, 8 November

Overcast. High 55°, low 40°.

Pressure29.88 inHg
Wind16.3 mph SW
Humidity42%
Visibility—
Dew point27°
Mon, 0964° / 52°0Partly cloudy
64 °Partly cloudy

Big Sag, Monday, 9 November

Partly cloudy. High 64°, low 52°.

Pressure29.88 inHg
Wind18.2 mph SW
Humidity43%
Visibility—
Dew point39°

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 Big Sag, 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 Big Sag, 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.