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As of 22:53 MDT

Weather in Big Sag, MT

32°Current weather

Big Sag, Friday, 23 October, 22:53

Overcast. Feels like 23°. High 49°, low 32°.

Pressure30.33 inHg
Wind11.2 mph SW
Humidity96%
Visibility2.5 mi
Dew point31°
Sat, 2441° / 27°0Clear
41 °Clear

Big Sag, Saturday, 24 October

Clear. High 41°, low 27°.

Pressure30.36 inHg
Wind4.1 mph NE
Humidity82%
Visibility6.2 mi
Dew point26°
Sun, 2539° / 24°0Clear
39 °Clear

Big Sag, Sunday, 25 October

Clear. High 39°, low 24°.

Pressure30.50 inHg
Wind3.2 mph NE
Humidity87%
Visibility6.2 mi
Dew point25°
Mon, 2644° / 24°0Partly cloudy
44 °Partly cloudy

Big Sag, Monday, 26 October

Partly cloudy. High 44°, low 24°.

Pressure30.24 inHg
Wind0.7 mph SE
Humidity86%
Visibility6.2 mi
Dew point28°
Tue, 2750° / 31°0.06Light rain
50 °Light rain

Big Sag, Tuesday, 27 October

Light rain. High 50°, low 31°.

Pressure29.97 inHg
Wind16.8 mph SW
Humidity63%
Visibility6.2 mi
Dew point32°
Wed, 2853° / 38°0.01Light rain
53 °Light rain

Big Sag, Wednesday, 28 October

Light rain. High 53°, low 38°.

Pressure29.94 inHg
Wind10.7 mph SW
Humidity51%
Visibility—
Dew point31°
Thu, 2948° / 33°0Overcast
48 °Overcast

Big Sag, Thursday, 29 October

Overcast. High 48°, low 33°.

Pressure29.94 inHg
Wind5.3 mph SE
Humidity66%
Visibility—
Dew point32°
Fri, 3049° / 37°0Clear
49 °Clear

Big Sag, Friday, 30 October

Clear. High 49°, low 37°.

Pressure29.94 inHg
Wind6.6 mph W
Humidity59%
Visibility—
Dew point31°
Sat, 3149° / 37°0Clear
49 °Clear

Big Sag, Saturday, 31 October

Clear. High 49°, low 37°.

Pressure30.00 inHg
Wind18.4 mph W
Humidity33%
Visibility—
Dew point18°
Sun, 0154° / 34°0Partly cloudy
54 °Partly cloudy

Big Sag, Sunday, 1 November

Partly cloudy. High 54°, low 34°.

Pressure30.24 inHg
Wind11.8 mph SW
Humidity26%
Visibility—
Dew point13°
Mon, 0252° / 37°0Overcast
52 °Overcast

Big Sag, Monday, 2 November

Overcast. High 52°, low 37°.

Pressure30.33 inHg
Wind7.3 mph SW
Humidity27%
Visibility—
Dew point14°
Tue, 0362° / 42°0Mostly clear
62 °Mostly clear

Big Sag, Tuesday, 3 November

Mostly clear. High 62°, low 42°.

Pressure29.91 inHg
Wind18.8 mph W
Humidity22%
Visibility—
Dew point18°
Wed, 0467° / 49°0Partly cloudy
67 °Partly cloudy

Big Sag, Wednesday, 4 November

Partly cloudy. High 67°, low 49°.

Pressure29.77 inHg
Wind15.1 mph SW
Humidity21%
Visibility—
Dew point21°
Thu, 0563° / 51°0Overcast
63 °Overcast

Big Sag, Thursday, 5 November

Overcast. High 63°, low 51°.

Pressure29.80 inHg
Wind23.4 mph SW
Humidity31%
Visibility—
Dew point29°
Fri, 0667° / 58°0Overcast
67 °Overcast

Big Sag, Friday, 6 November

Overcast. High 67°, low 58°.

Pressure30.09 inHg
Wind22.8 mph SW
Humidity46%
Visibility—
Dew point42°
Sat, 0773° / 57°0Partly cloudy
73 °Partly cloudy

Big Sag, Saturday, 7 November

Partly cloudy. High 73°, low 57°.

Pressure30.12 inHg
Wind15.1 mph SW
Humidity31%
Visibility—
Dew point35°

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.