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As of 13:47 MDT

Weather in Big Sag, MT

38°Current weather

Big Sag, Saturday, 24 October, 13:47

Clear. Feels like 36°. High 39°, low 26°.

Pressure30.27 inHg
Wind3.2 mph E
Humidity59%
Visibility6.2 mi
Dew point26°
Sun, 2539° / 24°0Mostly clear
39 °Mostly clear

Big Sag, Sunday, 25 October

Mostly clear. High 39°, low 24°.

Pressure30.50 inHg
Wind1.9 mph N
Humidity90%
Visibility6.2 mi
Dew point26°
Mon, 2645° / 24°0Mostly clear
45 °Mostly clear

Big Sag, Monday, 26 October

Mostly clear. High 45°, low 24°.

Pressure30.21 inHg
Wind0.5 mph SW
Humidity86%
Visibility6.2 mi
Dew point27°
Tue, 2750° / 34°0.14Rain
50 °Rain

Big Sag, Tuesday, 27 October

Rain. High 50°, low 34°.

Pressure29.88 inHg
Wind16 mph SW
Humidity63%
Visibility6.2 mi
Dew point33°
Wed, 2853° / 40°0Clear
53 °Clear

Big Sag, Wednesday, 28 October

Clear. High 53°, low 40°.

Pressure29.94 inHg
Wind11.9 mph SW
Humidity48%
Visibility6.2 mi
Dew point29°
Thu, 2938° / 31°0Overcast
38 °Overcast

Big Sag, Thursday, 29 October

Overcast. High 38°, low 31°.

Pressure30.21 inHg
Wind7.9 mph NE
Humidity93%
Visibility—
Dew point31°
Fri, 3050° / 37°0.13Snow
50 °Snow

Big Sag, Friday, 30 October

Snow. High 50°, low 37°.

Pressure29.77 inHg
Wind9.7 mph NW
Humidity73%
Visibility—
Dew point37°
Sat, 3144° / 35°0Light snow
44 °Light snow

Big Sag, Saturday, 31 October

Light snow. High 44°, low 35°.

Pressure29.94 inHg
Wind19.6 mph SW
Humidity63%
Visibility—
Dew point30°
Sun, 0148° / 32°0Clear
48 °Clear

Big Sag, Sunday, 1 November

Clear. High 48°, low 32°.

Pressure30.24 inHg
Wind18 mph SW
Humidity50%
Visibility—
Dew point24°
Mon, 0257° / 39°0Clear
57 °Clear

Big Sag, Monday, 2 November

Clear. High 57°, low 39°.

Pressure30.30 inHg
Wind6 mph S
Humidity48%
Visibility—
Dew point31°
Tue, 0358° / 45°0Overcast
58 °Overcast

Big Sag, Tuesday, 3 November

Overcast. High 58°, low 45°.

Pressure29.88 inHg
Wind17 mph SW
Humidity47%
Visibility—
Dew point32°
Wed, 0457° / 46°0Overcast
57 °Overcast

Big Sag, Wednesday, 4 November

Overcast. High 57°, low 46°.

Pressure29.62 inHg
Wind21.6 mph SW
Humidity52%
Visibility—
Dew point37°
Thu, 0558° / 46°0Overcast
58 °Overcast

Big Sag, Thursday, 5 November

Overcast. High 58°, low 46°.

Pressure29.62 inHg
Wind18.9 mph SW
Humidity45%
Visibility—
Dew point33°
Fri, 0657° / 44°0Overcast
57 °Overcast

Big Sag, Friday, 6 November

Overcast. High 57°, low 44°.

Pressure29.47 inHg
Wind18.2 mph SW
Humidity45%
Visibility—
Dew point35°
Sat, 0752° / 43°0Clear
52 °Clear

Big Sag, Saturday, 7 November

Clear. High 52°, low 43°.

Pressure29.97 inHg
Wind26.5 mph W
Humidity42%
Visibility—
Dew point26°
Sun, 0864° / 45°0Overcast
64 °Overcast

Big Sag, Sunday, 8 November

Overcast. High 64°, low 45°.

Pressure29.71 inHg
Wind11.2 mph SW
Humidity24%
Visibility—
Dew point21°

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.