10-day forecast for Big Sag, MT: 28° to 54°, with precipitation expected on 2 days. The table below breaks each day into morning, afternoon, evening and overnight.
54°
Best day: Sunday, November 15
45° · 0.31 in
Worst day: Tuesday, November 17
Tap any day below to see morning, afternoon, evening and overnight.
Mon, 1653° / 36°0
Morning37°feels 32°
Afternoon53°feels 50°
Evening45°feels 43°
Overnight38°feels 31°
53 °
Big Sag, Monday, 16 November
Overcast. High 53°, low 36°.
Pressure29.91 inHg
Wind2.9 mph NW
Humidity42%
Visibility6.2 mi
Dew point32°
Tue, 1745° / 34°0.31
Morning39°feels 37°
Afternoon45°feels 42°
Evening36°feels 31°
Overnight42°feels 42°
45 °
Big Sag, Tuesday, 17 November
Snow. High 45°, low 34°.
Pressure29.88 inHg
Wind6.7 mph N
Humidity71%
Visibility6.2 mi
Dew point35°
Wed, 1836° / 32°0.1
Morning33°feels 25°
Afternoon36°feels 28°
Evening34°feels 29°
Overnight34°feels 26°
36 °
Big Sag, Wednesday, 18 November
Snow. High 36°, low 32°.
Pressure30.09 inHg
Wind11.3 mph NW
Humidity85%
Visibility6.2 mi
Dew point29°
Thu, 1939° / 29°0
Morning31°feels 30°
Afternoon35°feels 29°
Evening33°feels 26°
Overnight31°feels 31°
39 °
Big Sag, Thursday, 19 November
Partly cloudy. High 39°, low 29°.
Pressure30.27 inHg
Wind7.3 mph E
Humidity85%
Visibility—
Dew point31°
Fri, 2033° / 28°0.03
Morning30°feels 23°
Afternoon32°feels 25°
Evening31°feels 25°
Overnight29°feels 25°
33 °
Big Sag, Friday, 20 November
Light snow. High 33°, low 28°.
Pressure30.12 inHg
Wind8.4 mph NE
Humidity97%
Visibility—
Dew point31°
Sat, 2141° / 28°0
Morning33°feels 28°
Afternoon38°feels 33°
Evening35°feels 31°
Overnight33°feels 28°
41 °
Big Sag, Saturday, 21 November
Partly cloudy. High 41°, low 28°.
Pressure30.03 inHg
Wind7.3 mph SW
Humidity78%
Visibility—
Dew point31°
Sun, 2244° / 33°0
Morning35°feels 33°
Afternoon40°feels 39°
Evening38°feels 33°
Overnight36°feels 31°
44 °
Big Sag, Sunday, 22 November
Overcast. High 44°, low 33°.
Pressure29.94 inHg
Wind6.4 mph S
Humidity71%
Visibility—
Dew point31°
Mon, 2345° / 35°0
Morning39°feels 33°
Afternoon44°feels 39°
Evening43°feels 37°
Overnight43°feels 35°
45 °
Big Sag, Monday, 23 November
Partly cloudy. High 45°, low 35°.
Pressure29.85 inHg
Wind17.6 mph SW
Humidity55%
Visibility—
Dew point28°
Tue, 2451° / 41°0
Morning43°feels 38°
Afternoon47°feels 45°
Evening45°feels 41°
Overnight42°feels 37°
51 °
Big Sag, Tuesday, 24 November
Partly cloudy. High 51°, low 41°.
Pressure29.71 inHg
Wind14.8 mph SW
Humidity59%
Visibility—
Dew point33°
About this forecast
How reliable is a 10-day forecast?
The first 3–5 days are the most reliable, typically within 2–4°. From day six to ten the models show the trend: the direction of change is right more often than the exact numbers.
What does the time-of-day table show?
Temperature in Big Sag, MT around 8am, 2pm, 8pm and 2am each day — handy for planning a walk, a drive or work outdoors.
How is the best day chosen?
We weigh the daytime high against precipitation: a warm, dry day scores highest.