10-day forecast for Portal, MT: 15° to 59°, with precipitation expected on 3 days. The table below breaks each day into morning, afternoon, evening and overnight.
59°
Best day: Wednesday, November 11
31° · 0.5 in
Worst day: Thursday, November 19
Tap any day below to see morning, afternoon, evening and overnight.
Thu, 1259° / 39°0
Morning42°feels 38°
Afternoon59°feels 56°
Evening40°feels 36°
Overnight39°feels 35°
59 °
Portal, Thursday, 12 November
Overcast. High 59°, low 39°.
Pressure29.97 inHg
Wind5.1 mph S
Humidity39%
Visibility6.2 mi
Dew point27°
Fri, 1351° / 33°0
Morning34°feels 29°
Afternoon51°feels 47°
Evening38°feels 32°
Overnight34°feels 29°
51 °
Portal, Friday, 13 November
Overcast. High 51°, low 33°.
Pressure29.65 inHg
Wind9.6 mph S
Humidity45%
Visibility6.2 mi
Dew point24°
Sat, 1448° / 32°0.04
Morning32°feels 27°
Afternoon48°feels 45°
Evening36°feels 32°
Overnight33°feels 27°
48 °
Portal, Saturday, 14 November
Light rain. High 48°, low 32°.
Pressure29.56 inHg
Wind8.5 mph S
Humidity53%
Visibility6.2 mi
Dew point30°
Sun, 1545° / 28°0
Morning28°feels 22°
Afternoon40°feels 34°
Evening35°feels 29°
Overnight34°feels 31°
45 °
Portal, Sunday, 15 November
Clear. High 45°, low 28°.
Pressure30.00 inHg
Wind8.6 mph S
Humidity67%
Visibility—
Dew point29°
Mon, 1646° / 28°0
Morning32°feels 26°
Afternoon41°feels 37°
Evening37°feels 33°
Overnight34°feels 30°
46 °
Portal, Monday, 16 November
Overcast. High 46°, low 28°.
Pressure29.91 inHg
Wind7.6 mph S
Humidity58%
Visibility—
Dew point26°
Tue, 1741° / 34°0.05
Morning38°feels 36°
Afternoon40°feels 39°
Evening37°feels 35°
Overnight35°feels 32°
41 °
Portal, Tuesday, 17 November
Light rain. High 41°, low 34°.
Pressure29.80 inHg
Wind3.8 mph N
Humidity77%
Visibility—
Dew point33°
Wed, 1838° / 29°0.03
Morning34°feels 33°
Afternoon36°feels 36°
Evening33°feels 32°
Overnight30°feels 25°
38 °
Portal, Wednesday, 18 November
Snow. High 38°, low 29°.
Pressure29.83 inHg
Wind4.8 mph S
Humidity77%
Visibility—
Dew point29°
Thu, 1931° / 25°0.5
Morning29°feels 25°
Afternoon30°feels 28°
Evening26°feels 15°
Overnight26°feels 20°
31 °
Portal, Thursday, 19 November
Snow. High 31°, low 25°.
Pressure29.85 inHg
Wind13.9 mph W
Humidity91%
Visibility—
Dew point28°
Fri, 2028° / 15°0.26
Morning25°feels 19°
Afternoon26°feels 19°
Evening17°feels 11°
Overnight17°feels 11°
28 °
Portal, Friday, 20 November
Snow. High 28°, low 15°.
Pressure30.30 inHg
Wind6.6 mph N
Humidity83%
Visibility—
Dew point22°
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 Portal, 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.