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As of 17:52 MST

Weather in Big Sag, MT

53°Current weather

Big Sag, Friday, 6 November, 17:52

Partly cloudy. Feels like 50°. High 55°, low 30°.

Pressure29.97 inHg
Wind18.3 mph SW
Humidity44%
Visibility6.2 mi
Dew point32°
Sat, 0760° / 39°0Overcast
60 °Overcast

Big Sag, Saturday, 7 November

Overcast. High 60°, low 39°.

Pressure30.09 inHg
Wind14.4 mph SW
Humidity43%
Visibility6.2 mi
Dew point37°
Sun, 0865° / 38°0Overcast
65 °Overcast

Big Sag, Sunday, 8 November

Overcast. High 65°, low 38°.

Pressure29.85 inHg
Wind20.1 mph SW
Humidity28%
Visibility6.2 mi
Dew point32°
Mon, 0953° / 40°0Overcast
53 °Overcast

Big Sag, Monday, 9 November

Overcast. High 53°, low 40°.

Pressure30.06 inHg
Wind2.6 mph SW
Humidity51%
Visibility6.2 mi
Dew point35°
Tue, 1058° / 48°0Partly cloudy
58 °Partly cloudy

Big Sag, Tuesday, 10 November

Partly cloudy. High 58°, low 48°.

Pressure30.00 inHg
Wind20.7 mph SW
Humidity47%
Visibility6.2 mi
Dew point37°
Wed, 1165° / 49°0.04Light rain
65 °Light rain

Big Sag, Wednesday, 11 November

Light rain. High 65°, low 49°.

Pressure30.09 inHg
Wind16.4 mph SW
Humidity42%
Visibility—
Dew point36°
Thu, 1264° / 49°0Partly cloudy
64 °Partly cloudy

Big Sag, Thursday, 12 November

Partly cloudy. High 64°, low 49°.

Pressure29.91 inHg
Wind10.9 mph SW
Humidity31%
Visibility—
Dew point27°
Fri, 1362° / 47°0Overcast
62 °Overcast

Big Sag, Friday, 13 November

Overcast. High 62°, low 47°.

Pressure29.65 inHg
Wind14.9 mph S
Humidity22%
Visibility—
Dew point18°
Sat, 1459° / 46°0.1Light rain
59 °Light rain

Big Sag, Saturday, 14 November

Light rain. High 59°, low 46°.

Pressure29.56 inHg
Wind16.7 mph SW
Humidity34%
Visibility—
Dew point29°
Sun, 1556° / 42°0.07Light rain
56 °Light rain

Big Sag, Sunday, 15 November

Light rain. High 56°, low 42°.

Pressure29.71 inHg
Wind18.3 mph SW
Humidity39%
Visibility—
Dew point27°
Mon, 1648° / 38°0Overcast
48 °Overcast

Big Sag, Monday, 16 November

Overcast. High 48°, low 38°.

Pressure29.88 inHg
Wind17.4 mph SW
Humidity41%
Visibility—
Dew point22°
Tue, 1741° / 30°0Partly cloudy
41 °Partly cloudy

Big Sag, Tuesday, 17 November

Partly cloudy. High 41°, low 30°.

Pressure29.94 inHg
Wind5 mph N
Humidity52%
Visibility—
Dew point23°
Wed, 1840° / 29°0Clear
40 °Clear

Big Sag, Wednesday, 18 November

Clear. High 40°, low 29°.

Pressure30.15 inHg
Wind7.1 mph SW
Humidity44%
Visibility—
Dew point17°
Thu, 1937° / 28°0Overcast
37 °Overcast

Big Sag, Thursday, 19 November

Overcast. High 37°, low 28°.

Pressure30.21 inHg
Wind4.7 mph SW
Humidity46%
Visibility—
Dew point15°
Fri, 2037° / 29°0.04Light snow
37 °Light snow

Big Sag, Friday, 20 November

Light snow. High 37°, low 29°.

Pressure30.39 inHg
Wind5.3 mph S
Humidity81%
Visibility—
Dew point29°
Sat, 2144° / 31°0Overcast
44 °Overcast

Big Sag, Saturday, 21 November

Overcast. High 44°, low 31°.

Pressure30.30 inHg
Wind5.6 mph SE
Humidity61%
Visibility—
Dew point27°

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.