10-day forecast for Summit, MT: 22° to 59°, with precipitation expected on 2 days. The table below breaks each day into morning, afternoon, evening and overnight.
59°
Best day: Monday, October 19
43° · 0.68 in
Worst day: Friday, October 23
Tap any day below to see morning, afternoon, evening and overnight.
Mon, 1959° / 24°0
Morning24°feels 24°
Afternoon56°feels 53°
Evening40°feels 40°
Overnight31°feels 31°
59 °
Summit, Monday, 19 October
Partly cloudy. High 59°, low 24°.
Pressure29.97 inHg
Wind1.2 mph W
Humidity41%
Visibility6.2 mi
Dew point32°
Tue, 2056° / 29°0
Morning36°feels 36°
Afternoon56°feels 54°
Evening44°feels 44°
Overnight35°feels 35°
56 °
Summit, Tuesday, 20 October
Mostly clear. High 56°, low 29°.
Pressure30.03 inHg
Wind2.4 mph NW
Humidity53%
Visibility6.2 mi
Dew point38°
Wed, 2158° / 38°0.02
Morning38°feels 38°
Afternoon57°feels 55°
Evening46°feels 46°
Overnight39°feels 39°
58 °
Summit, Wednesday, 21 October
Light rain. High 58°, low 38°.
Pressure30.06 inHg
Wind1.5 mph NW
Humidity63%
Visibility6.2 mi
Dew point42°
Thu, 2259° / 40°0
Morning43°feels 43°
Afternoon56°feels 54°
Evening51°feels 49°
Overnight40°feels 40°
59 °
Summit, Thursday, 22 October
Light rain. High 59°, low 40°.
Pressure29.83 inHg
Wind9.6 mph S
Humidity54%
Visibility—
Dew point38°
Fri, 2343° / 28°0.68
Morning39°feels 38°
Afternoon35°feels 30°
Evening33°feels 26°
Overnight31°feels 25°
43 °
Summit, Friday, 23 October
Snow. High 43°, low 28°.
Pressure29.83 inHg
Wind8.5 mph W
Humidity97%
Visibility—
Dew point35°
Sat, 2447° / 22°0
Morning28°feels 23°
Afternoon41°feels 38°
Evening39°feels 34°
Overnight31°feels 26°
47 °
Summit, Saturday, 24 October
Partly cloudy. High 47°, low 22°.
Pressure30.24 inHg
Wind10.4 mph SW
Humidity51%
Visibility—
Dew point22°
Sun, 2551° / 29°0
Morning33°feels 27°
Afternoon45°feels 41°
Evening41°feels 37°
Overnight33°feels 27°
51 °
Summit, Sunday, 25 October
Overcast. High 51°, low 29°.
Pressure30.06 inHg
Wind10.4 mph S
Humidity35%
Visibility—
Dew point17°
Mon, 2646° / 29°0
Morning32°feels 28°
Afternoon39°feels 34°
Evening35°feels 29°
Overnight29°feels 24°
46 °
Summit, Monday, 26 October
Overcast. High 46°, low 29°.
Pressure29.88 inHg
Wind8.3 mph NE
Humidity48%
Visibility—
Dew point20°
Tue, 2736° / 26°0.16
Morning32°feels 25°
Afternoon34°feels 25°
Evening28°feels 22°
Overnight27°feels 21°
36 °
Summit, Tuesday, 27 October
Light snow. High 36°, low 26°.
Pressure29.71 inHg
Wind15.7 mph S
Humidity54%
Visibility—
Dew point20°
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 Summit, 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.