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As of 18:35 MST

Weather in Big Sag, MT

37°Current weather

Big Sag, Sunday, 1 November, 18:35

Light rain. Feels like 33°. High 39°, low 31°.

Pressure29.94 inHg
Wind5.2 mph NW
Humidity99%
Visibility2.7 mi
Dew point37°
Mon, 0247° / 33°0.03Light rain
47 °Light rain

Big Sag, Monday, 2 November

Light rain. High 47°, low 33°.

Pressure30.24 inHg
Wind9 mph W
Humidity55%
Visibility6.2 mi
Dew point33°
Tue, 0354° / 33°0Clear
54 °Clear

Big Sag, Tuesday, 3 November

Clear. High 54°, low 33°.

Pressure30.06 inHg
Wind4.9 mph NE
Humidity48%
Visibility6.2 mi
Dew point30°
Wed, 0450° / 32°0Partly cloudy
50 °Partly cloudy

Big Sag, Wednesday, 4 November

Partly cloudy. High 50°, low 32°.

Pressure30.09 inHg
Wind7.9 mph SW
Humidity55%
Visibility6.2 mi
Dew point28°
Thu, 0557° / 34°0Partly cloudy
57 °Partly cloudy

Big Sag, Thursday, 5 November

Partly cloudy. High 57°, low 34°.

Pressure29.97 inHg
Wind9.1 mph W
Humidity44%
Visibility6.2 mi
Dew point29°
Fri, 0656° / 39°0.01Light rain
56 °Light rain

Big Sag, Friday, 6 November

Light rain. High 56°, low 39°.

Pressure29.97 inHg
Wind22.9 mph SW
Humidity43%
Visibility—
Dew point29°
Sat, 0755° / 37°0Clear
55 °Clear

Big Sag, Saturday, 7 November

Clear. High 55°, low 37°.

Pressure30.24 inHg
Wind18.7 mph W
Humidity48%
Visibility—
Dew point27°
Sun, 0860° / 44°0Mostly clear
60 °Mostly clear

Big Sag, Sunday, 8 November

Mostly clear. High 60°, low 44°.

Pressure29.97 inHg
Wind19.3 mph SW
Humidity28%
Visibility—
Dew point24°
Mon, 0957° / 43°0Overcast
57 °Overcast

Big Sag, Monday, 9 November

Overcast. High 57°, low 43°.

Pressure30.09 inHg
Wind9 mph SW
Humidity49%
Visibility—
Dew point32°
Tue, 1064° / 51°0Overcast
64 °Overcast

Big Sag, Tuesday, 10 November

Overcast. High 64°, low 51°.

Pressure30.06 inHg
Wind12.6 mph W
Humidity38%
Visibility—
Dew point33°
Wed, 1165° / 49°0Partly cloudy
65 °Partly cloudy

Big Sag, Wednesday, 11 November

Partly cloudy. High 65°, low 49°.

Pressure30.12 inHg
Wind5.8 mph S
Humidity33%
Visibility—
Dew point30°
Thu, 1265° / 50°0Overcast
65 °Overcast

Big Sag, Thursday, 12 November

Overcast. High 65°, low 50°.

Pressure29.85 inHg
Wind5.9 mph S
Humidity20%
Visibility—
Dew point20°
Fri, 1363° / 48°0Mostly clear
63 °Mostly clear

Big Sag, Friday, 13 November

Mostly clear. High 63°, low 48°.

Pressure29.59 inHg
Wind13.3 mph SW
Humidity23%
Visibility—
Dew point24°
Sat, 1460° / 48°0Overcast
60 °Overcast

Big Sag, Saturday, 14 November

Overcast. High 60°, low 48°.

Pressure29.77 inHg
Wind20 mph SW
Humidity41%
Visibility—
Dew point31°
Sun, 1565° / 46°0Partly cloudy
65 °Partly cloudy

Big Sag, Sunday, 15 November

Partly cloudy. High 65°, low 46°.

Pressure29.62 inHg
Wind13.8 mph SW
Humidity36%
Visibility—
Dew point34°
Mon, 1645° / 38°0.13Light rain
45 °Light rain

Big Sag, Monday, 16 November

Light rain. High 45°, low 38°.

Pressure29.83 inHg
Wind9.5 mph NW
Humidity57%
Visibility—
Dew point30°

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.