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As of 02:16 MST

Weather in Big Sag, MT

44°Current weather

Big Sag, Sunday, 15 November, 02:16

Clear. Feels like 38°. High 55°, low 32°.

Pressure29.85 inHg
Wind11 mph SW
Humidity71%
Visibility6.2 mi
Dew point33°
Mon, 1651° / 32°0Overcast
51 °Overcast

Big Sag, Monday, 16 November

Overcast. High 51°, low 32°.

Pressure29.91 inHg
Wind4.5 mph W
Humidity41%
Visibility6.2 mi
Dew point31°
Tue, 1744° / 33°0.31Snow
44 °Snow

Big Sag, Tuesday, 17 November

Snow. High 44°, low 33°.

Pressure29.88 inHg
Wind9.3 mph NE
Humidity80%
Visibility6.2 mi
Dew point37°
Wed, 1836° / 28°0.05Snow
36 °Snow

Big Sag, Wednesday, 18 November

Snow. High 36°, low 28°.

Pressure30.12 inHg
Wind11.7 mph W
Humidity85%
Visibility6.2 mi
Dew point29°
Thu, 1935° / 26°0.09Light snow
35 °Light snow

Big Sag, Thursday, 19 November

Light snow. High 35°, low 26°.

Pressure30.24 inHg
Wind7.8 mph NE
Humidity88%
Visibility—
Dew point30°
Fri, 2034° / 31°0.07Snow
34 °Snow

Big Sag, Friday, 20 November

Snow. High 34°, low 31°.

Pressure30.12 inHg
Wind5.5 mph NE
Humidity97%
Visibility—
Dew point31°
Sat, 2138° / 30°0.04Light snow
38 °Light snow

Big Sag, Saturday, 21 November

Light snow. High 38°, low 30°.

Pressure30.21 inHg
Wind6.6 mph SE
Humidity77%
Visibility—
Dew point29°
Sun, 2242° / 32°0Overcast
42 °Overcast

Big Sag, Sunday, 22 November

Overcast. High 42°, low 32°.

Pressure30.12 inHg
Wind4.5 mph SE
Humidity79%
Visibility—
Dew point32°
Mon, 2343° / 37°0Mostly clear
43 °Mostly clear

Big Sag, Monday, 23 November

Mostly clear. High 43°, low 37°.

Pressure30.00 inHg
Wind13.4 mph SW
Humidity67%
Visibility—
Dew point32°
Tue, 2448° / 40°0Overcast
48 °Overcast

Big Sag, Tuesday, 24 November

Overcast. High 48°, low 40°.

Pressure29.80 inHg
Wind15.9 mph SW
Humidity62%
Visibility—
Dew point33°
Wed, 2551° / 42°0Overcast
51 °Overcast

Big Sag, Wednesday, 25 November

Overcast. High 51°, low 42°.

Pressure29.71 inHg
Wind9.2 mph S
Humidity65%
Visibility—
Dew point37°
Thu, 2648° / 37°0Overcast
48 °Overcast

Big Sag, Thursday, 26 November

Overcast. High 48°, low 37°.

Pressure30.00 inHg
Wind8.3 mph W
Humidity70%
Visibility—
Dew point35°
Fri, 2748° / 34°0Clear
48 °Clear

Big Sag, Friday, 27 November

Clear. High 48°, low 34°.

Pressure30.30 inHg
Wind6 mph S
Humidity59%
Visibility—
Dew point29°
Sat, 2845° / 34°0Overcast
45 °Overcast

Big Sag, Saturday, 28 November

Overcast. High 45°, low 34°.

Pressure30.12 inHg
Wind3.9 mph S
Humidity40%
Visibility—
Dew point20°
Sun, 2949° / 36°0Overcast
49 °Overcast

Big Sag, Sunday, 29 November

Overcast. High 49°, low 36°.

Pressure30.12 inHg
Wind4 mph SE
Humidity37%
Visibility—
Dew point19°
Mon, 3048° / 38°0Clear
48 °Clear

Big Sag, Monday, 30 November

Clear. High 48°, low 38°.

Pressure30.03 inHg
Wind9.5 mph SW
Humidity36%
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 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.