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As of 20:46 MDT

Weather in Big Sag, MT

33°Current weather

Big Sag, Monday, 26 October, 20:46

Overcast. Feels like 28°. High 40°, low 24°.

Pressure29.91 inHg
Wind5.1 mph SW
Humidity77%
Visibility2.3 mi
Dew point27°
Tue, 2749° / 31°0.12Snow
49 °Snow

Big Sag, Tuesday, 27 October

Snow. High 49°, low 31°.

Pressure29.83 inHg
Wind19.6 mph SW
Humidity54%
Visibility6.2 mi
Dew point31°
Wed, 2852° / 35°0Mostly clear
52 °Mostly clear

Big Sag, Wednesday, 28 October

Mostly clear. High 52°, low 35°.

Pressure29.94 inHg
Wind11.9 mph W
Humidity53%
Visibility6.2 mi
Dew point30°
Thu, 2942° / 28°0Overcast
42 °Overcast

Big Sag, Thursday, 29 October

Overcast. High 42°, low 28°.

Pressure30.27 inHg
Wind3.8 mph NE
Humidity90%
Visibility6.2 mi
Dew point30°
Fri, 3040° / 29°0.06Light rain
40 °Light rain

Big Sag, Friday, 30 October

Light rain. High 40°, low 29°.

Pressure30.15 inHg
Wind1.1 mph S
Humidity92%
Visibility6.2 mi
Dew point31°
Sat, 3147° / 31°0Overcast
47 °Overcast

Big Sag, Saturday, 31 October

Overcast. High 47°, low 31°.

Pressure30.03 inHg
Wind5.6 mph NE
Humidity84%
Visibility—
Dew point34°
Sun, 0137° / 32°1.27Snow
37 °Snow

Big Sag, Sunday, 1 November

Snow. High 37°, low 32°.

Pressure30.09 inHg
Wind8.7 mph NW
Humidity91%
Visibility—
Dew point34°
Mon, 0234° / 32°0.42Snow
34 °Snow

Big Sag, Monday, 2 November

Snow. High 34°, low 32°.

Pressure30.47 inHg
Wind10.7 mph NW
Humidity91%
Visibility—
Dew point30°
Tue, 0335° / 29°0Mostly clear
35 °Mostly clear

Big Sag, Tuesday, 3 November

Mostly clear. High 35°, low 29°.

Pressure30.36 inHg
Wind7.9 mph S
Humidity99%
Visibility—
Dew point34°
Wed, 0436° / 25°0Mostly clear
36 °Mostly clear

Big Sag, Wednesday, 4 November

Mostly clear. High 36°, low 25°.

Pressure30.47 inHg
Wind6.8 mph S
Humidity92%
Visibility—
Dew point31°
Thu, 0536° / 27°0Mostly clear
36 °Mostly clear

Big Sag, Thursday, 5 November

Mostly clear. High 36°, low 27°.

Pressure30.12 inHg
Wind5.1 mph SE
Humidity96%
Visibility—
Dew point34°
Fri, 0642° / 36°0Overcast
42 °Overcast

Big Sag, Friday, 6 November

Overcast. High 42°, low 36°.

Pressure29.85 inHg
Wind8.5 mph S
Humidity94%
Visibility—
Dew point39°
Sat, 0749° / 42°0Overcast
49 °Overcast

Big Sag, Saturday, 7 November

Overcast. High 49°, low 42°.

Pressure29.56 inHg
Wind9.6 mph S
Humidity85%
Visibility—
Dew point42°
Sun, 0853° / 42°0Clear
53 °Clear

Big Sag, Sunday, 8 November

Clear. High 53°, low 42°.

Pressure29.62 inHg
Wind22.4 mph W
Humidity64%
Visibility—
Dew point38°
Mon, 0953° / 42°0Mostly clear
53 °Mostly clear

Big Sag, Monday, 9 November

Mostly clear. High 53°, low 42°.

Pressure29.85 inHg
Wind20.6 mph W
Humidity58%
Visibility—
Dew point35°
Tue, 1051° / 38°0.1Snow
51 °Snow

Big Sag, Tuesday, 10 November

Snow. High 51°, low 38°.

Pressure30.09 inHg
Wind20.7 mph NW
Humidity61%
Visibility—
Dew point36°

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.