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As of 12:48 MST

Weather in Big Sag, MT

66°Current weather

Big Sag, Wednesday, 11 November, 12:48

Partly cloudy. Feels like 65°. High 66°, low 40°.

Pressure30.03 inHg
Wind14.5 mph SW
Humidity58%
Visibility6.2 mi
Dew point51°
Thu, 1264° / 45°0Overcast
64 °Overcast

Big Sag, Thursday, 12 November

Overcast. High 64°, low 45°.

Pressure29.88 inHg
Wind3.2 mph NE
Humidity38%
Visibility6.2 mi
Dew point38°
Fri, 1358° / 38°0Overcast
58 °Overcast

Big Sag, Friday, 13 November

Overcast. High 58°, low 38°.

Pressure29.59 inHg
Wind4.5 mph NE
Humidity49%
Visibility6.2 mi
Dew point36°
Sat, 1459° / 38°0Partly cloudy
59 °Partly cloudy

Big Sag, Saturday, 14 November

Partly cloudy. High 59°, low 38°.

Pressure29.53 inHg
Wind1.2 mph N
Humidity53%
Visibility6.2 mi
Dew point36°
Sun, 1557° / 43°0Clear
57 °Clear

Big Sag, Sunday, 15 November

Clear. High 57°, low 43°.

Pressure29.91 inHg
Wind10.5 mph SW
Humidity46%
Visibility6.2 mi
Dew point35°
Mon, 1658° / 43°0Overcast
58 °Overcast

Big Sag, Monday, 16 November

Overcast. High 58°, low 43°.

Pressure29.88 inHg
Wind8.6 mph SW
Humidity44%
Visibility—
Dew point31°
Tue, 1748° / 40°0Overcast
48 °Overcast

Big Sag, Tuesday, 17 November

Overcast. High 48°, low 40°.

Pressure29.83 inHg
Wind6.1 mph NE
Humidity55%
Visibility—
Dew point31°
Wed, 1846° / 38°0Overcast
46 °Overcast

Big Sag, Wednesday, 18 November

Overcast. High 46°, low 38°.

Pressure29.85 inHg
Wind4.8 mph SE
Humidity70%
Visibility—
Dew point33°
Thu, 1942° / 34°0.1Light snow
42 °Light snow

Big Sag, Thursday, 19 November

Light snow. High 42°, low 34°.

Pressure29.85 inHg
Wind6.7 mph NE
Humidity68%
Visibility—
Dew point29°
Fri, 2035° / 31°0.38Snow
35 °Snow

Big Sag, Friday, 20 November

Snow. High 35°, low 31°.

Pressure30.33 inHg
Wind7.6 mph N
Humidity96%
Visibility—
Dew point32°
Sat, 2130° / 23°0.02Light snow
30 °Light snow

Big Sag, Saturday, 21 November

Light snow. High 30°, low 23°.

Pressure30.42 inHg
Wind7.8 mph W
Humidity79%
Visibility—
Dew point22°
Sun, 2233° / 22°0.01Light snow
33 °Light snow

Big Sag, Sunday, 22 November

Light snow. High 33°, low 22°.

Pressure30.24 inHg
Wind10 mph SW
Humidity78%
Visibility—
Dew point22°
Mon, 2340° / 30°0Overcast
40 °Overcast

Big Sag, Monday, 23 November

Overcast. High 40°, low 30°.

Pressure30.06 inHg
Wind10.1 mph SW
Humidity75%
Visibility—
Dew point29°
Tue, 2449° / 40°0.01Light rain
49 °Light rain

Big Sag, Tuesday, 24 November

Light rain. High 49°, low 40°.

Pressure29.85 inHg
Wind21.3 mph SW
Humidity72%
Visibility—
Dew point40°
Wed, 2551° / 41°0Overcast
51 °Overcast

Big Sag, Wednesday, 25 November

Overcast. High 51°, low 41°.

Pressure30.12 inHg
Wind18.9 mph SW
Humidity59%
Visibility—
Dew point33°
Thu, 2653° / 49°0Overcast
53 °Overcast

Big Sag, Thursday, 26 November

Overcast. High 53°, low 49°.

Pressure29.85 inHg
Wind26.4 mph W
Humidity64%
Visibility—
Dew point40°

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.