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As of 21:46 MDT

Weather in Big Sag, MT

37°Current weather

Big Sag, Saturday, 31 October, 21:46

Overcast. Feels like 37°. High 42°, low 33°.

Pressure30.00 inHg
Wind2.3 mph E
Humidity92%
Visibility6.2 mi
Dew point35°
Sun, 0137° / 32°0.59Rain
37 °Rain

Big Sag, Sunday, 1 November

Rain. High 37°, low 32°.

Pressure29.97 inHg
Wind2.6 mph N
Humidity96%
Visibility1.4 mi
Dew point36°
Mon, 0252° / 35°0.04Light rain
52 °Light rain

Big Sag, Monday, 2 November

Light rain. High 52°, low 35°.

Pressure30.27 inHg
Wind8 mph W
Humidity62%
Visibility6.2 mi
Dew point35°
Tue, 0353° / 33°0Overcast
53 °Overcast

Big Sag, Tuesday, 3 November

Overcast. High 53°, low 33°.

Pressure30.09 inHg
Wind2.6 mph E
Humidity58%
Visibility6.2 mi
Dew point33°
Wed, 0450° / 36°0Overcast
50 °Overcast

Big Sag, Wednesday, 4 November

Overcast. High 50°, low 36°.

Pressure30.09 inHg
Wind6.6 mph W
Humidity59%
Visibility6.2 mi
Dew point29°
Thu, 0556° / 36°0Overcast
56 °Overcast

Big Sag, Thursday, 5 November

Overcast. High 56°, low 36°.

Pressure29.91 inHg
Wind16.3 mph SW
Humidity42%
Visibility—
Dew point29°
Fri, 0653° / 39°0Mostly clear
53 °Mostly clear

Big Sag, Friday, 6 November

Mostly clear. High 53°, low 39°.

Pressure29.85 inHg
Wind21.7 mph SW
Humidity41%
Visibility—
Dew point29°
Sat, 0755° / 42°0Partly cloudy
55 °Partly cloudy

Big Sag, Saturday, 7 November

Partly cloudy. High 55°, low 42°.

Pressure30.06 inHg
Wind11.3 mph SW
Humidity52%
Visibility—
Dew point32°
Sun, 0860° / 47°0Overcast
60 °Overcast

Big Sag, Sunday, 8 November

Overcast. High 60°, low 47°.

Pressure29.85 inHg
Wind13.5 mph SW
Humidity43%
Visibility—
Dew point33°
Mon, 0945° / 39°0.03Snow
45 °Snow

Big Sag, Monday, 9 November

Snow. High 45°, low 39°.

Pressure30.30 inHg
Wind6.9 mph N
Humidity73%
Visibility—
Dew point32°
Tue, 1055° / 40°0Overcast
55 °Overcast

Big Sag, Tuesday, 10 November

Overcast. High 55°, low 40°.

Pressure29.97 inHg
Wind8.1 mph S
Humidity56%
Visibility—
Dew point34°
Wed, 1160° / 44°0.02Light rain
60 °Light rain

Big Sag, Wednesday, 11 November

Light rain. High 60°, low 44°.

Pressure29.59 inHg
Wind22.5 mph SW
Humidity34%
Visibility—
Dew point29°
Thu, 1249° / 42°0Overcast
49 °Overcast

Big Sag, Thursday, 12 November

Overcast. High 49°, low 42°.

Pressure29.68 inHg
Wind26.3 mph SW
Humidity47%
Visibility—
Dew point28°
Fri, 1354° / 43°0Overcast
54 °Overcast

Big Sag, Friday, 13 November

Overcast. High 54°, low 43°.

Pressure29.77 inHg
Wind12 mph SW
Humidity46%
Visibility—
Dew point30°
Sat, 1461° / 44°0Overcast
61 °Overcast

Big Sag, Saturday, 14 November

Overcast. High 61°, low 44°.

Pressure29.62 inHg
Wind8.7 mph SW
Humidity37%
Visibility—
Dew point33°
Sun, 1549° / 38°0.12Rain
49 °Rain

Big Sag, Sunday, 15 November

Rain. High 49°, low 38°.

Pressure29.80 inHg
Wind10.8 mph SW
Humidity64%
Visibility—
Dew point33°

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.