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As of 06:07 MDT

Weather in Big Sag, MT

26°Current weather

Big Sag, Monday, 26 October, 06:07

Overcast. Feels like 26°. High 43°, low 26°.

Pressure30.27 inHg
Wind2.7 mph SW
Humidity82%
Visibility6.2 mi
Dew point22°
Tue, 2750° / 35°0.11Rain
50 °Rain

Big Sag, Tuesday, 27 October

Rain. High 50°, low 35°.

Pressure29.83 inHg
Wind17.6 mph SW
Humidity58%
Visibility6.2 mi
Dew point32°
Wed, 2853° / 38°0Clear
53 °Clear

Big Sag, Wednesday, 28 October

Clear. High 53°, low 38°.

Pressure29.91 inHg
Wind14.7 mph SW
Humidity50%
Visibility6.2 mi
Dew point29°
Thu, 2941° / 30°0Overcast
41 °Overcast

Big Sag, Thursday, 29 October

Overcast. High 41°, low 30°.

Pressure30.21 inHg
Wind3.4 mph E
Humidity85%
Visibility6.2 mi
Dew point32°
Fri, 3041° / 29°0Overcast
41 °Overcast

Big Sag, Friday, 30 October

Overcast. High 41°, low 29°.

Pressure30.06 inHg
Wind7.9 mph NE
Humidity75%
Visibility—
Dew point31°
Sat, 3147° / 31°0Overcast
47 °Overcast

Big Sag, Saturday, 31 October

Overcast. High 47°, low 31°.

Pressure30.03 inHg
Wind6 mph NE
Humidity82%
Visibility—
Dew point34°
Sun, 0152° / 36°0.37Snow
52 °Snow

Big Sag, Sunday, 1 November

Snow. High 52°, low 36°.

Pressure29.94 inHg
Wind11.3 mph W
Humidity50%
Visibility—
Dew point31°
Mon, 0245° / 33°0.04Light snow
45 °Light snow

Big Sag, Monday, 2 November

Light snow. High 45°, low 33°.

Pressure30.30 inHg
Wind7.7 mph W
Humidity65%
Visibility—
Dew point29°
Tue, 0346° / 32°0Overcast
46 °Overcast

Big Sag, Tuesday, 3 November

Overcast. High 46°, low 32°.

Pressure30.03 inHg
Wind4.6 mph S
Humidity42%
Visibility—
Dew point21°
Wed, 0453° / 41°0Overcast
53 °Overcast

Big Sag, Wednesday, 4 November

Overcast. High 53°, low 41°.

Pressure29.85 inHg
Wind23.7 mph SW
Humidity56%
Visibility—
Dew point34°
Thu, 0561° / 42°0Overcast
61 °Overcast

Big Sag, Thursday, 5 November

Overcast. High 61°, low 42°.

Pressure29.83 inHg
Wind14.4 mph SW
Humidity37%
Visibility—
Dew point29°
Fri, 0669° / 52°0Overcast
69 °Overcast

Big Sag, Friday, 6 November

Overcast. High 69°, low 52°.

Pressure29.56 inHg
Wind8.1 mph S
Humidity41%
Visibility—
Dew point40°
Sat, 0760° / 46°0Overcast
60 °Overcast

Big Sag, Saturday, 7 November

Overcast. High 60°, low 46°.

Pressure29.38 inHg
Wind21.3 mph SW
Humidity47%
Visibility—
Dew point39°
Sun, 0851° / 40°0Overcast
51 °Overcast

Big Sag, Sunday, 8 November

Overcast. High 51°, low 40°.

Pressure29.80 inHg
Wind20.8 mph W
Humidity42%
Visibility—
Dew point26°
Mon, 0958° / 42°0Mostly clear
58 °Mostly clear

Big Sag, Monday, 9 November

Mostly clear. High 58°, low 42°.

Pressure30.00 inHg
Wind26.6 mph W
Humidity49%
Visibility—
Dew point35°
Tue, 1059° / 49°0Overcast
59 °Overcast

Big Sag, Tuesday, 10 November

Overcast. High 59°, low 49°.

Pressure30.06 inHg
Wind13.6 mph SW
Humidity49%
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.