10-day forecast for Summit, MT: 22° to 57°, with precipitation expected on 2 days. The table below breaks each day into morning, afternoon, evening and overnight.
57°
Best day: Sunday, October 18
31° · 1.05 in
Worst day: Sunday, October 11
Tap any day below to see morning, afternoon, evening and overnight.
Mon, 1229° / 24°0.04
Morning25°feels 25°
Afternoon29°feels 26°
Evening27°feels 27°
Overnight27°feels 27°
29 °
Summit, Monday, 12 October
Snow. High 29°, low 24°.
Pressure30.09 inHg
Wind4 mph NE
Humidity98%
Visibility0.8 mi
Dew point27°
Tue, 1336° / 24°0
Morning26°feels 21°
Afternoon34°feels 34°
Evening29°feels 29°
Overnight25°feels 20°
36 °
Summit, Tuesday, 13 October
Clear. High 36°, low 24°.
Pressure30.15 inHg
Wind3.2 mph W
Humidity93%
Visibility6.2 mi
Dew point29°
Wed, 1440° / 23°0
Morning22°feels 22°
Afternoon39°feels 39°
Evening33°feels 33°
Overnight23°feels 23°
40 °
Summit, Wednesday, 14 October
Clear. High 40°, low 23°.
Pressure30.21 inHg
Wind1.5 mph NW
Humidity74%
Visibility6.2 mi
Dew point26°
Thu, 1541° / 28°0
Morning31°feels 31°
Afternoon39°feels 39°
Evening36°feels 36°
Overnight29°feels 29°
41 °
Summit, Thursday, 15 October
Clear. High 41°, low 28°.
Pressure30.53 inHg
Wind3.1 mph NE
Humidity68%
Visibility—
Dew point28°
Fri, 1653° / 30°0
Morning37°feels 37°
Afternoon49°feels 49°
Evening45°feels 44°
Overnight36°feels 34°
53 °
Summit, Friday, 16 October
Clear. High 53°, low 30°.
Pressure30.42 inHg
Wind3.7 mph S
Humidity48%
Visibility—
Dew point28°
Sat, 1755° / 30°0
Morning36°feels 30°
Afternoon50°feels 46°
Evening45°feels 41°
Overnight36°feels 30°
55 °
Summit, Saturday, 17 October
Mostly clear. High 55°, low 30°.
Pressure30.18 inHg
Wind10.6 mph SW
Humidity40%
Visibility—
Dew point24°
Sun, 1857° / 36°0
Morning40°feels 36°
Afternoon51°feels 48°
Evening48°feels 45°
Overnight40°feels 36°
57 °
Summit, Sunday, 18 October
Overcast. High 57°, low 36°.
Pressure30.03 inHg
Wind9.5 mph SW
Humidity38%
Visibility—
Dew point25°
Mon, 1956° / 39°0
Morning44°feels 40°
Afternoon53°feels 49°
Evening48°feels 43°
Overnight39°feels 35°
56 °
Summit, Monday, 19 October
Overcast. High 56°, low 39°.
Pressure29.88 inHg
Wind14.7 mph W
Humidity35%
Visibility—
Dew point25°
Tue, 2044° / 32°0
Morning35°feels 32°
Afternoon43°feels 39°
Evening40°feels 37°
Overnight33°feels 33°
44 °
Summit, Tuesday, 20 October
Overcast. High 44°, low 32°.
Pressure29.94 inHg
Wind9.8 mph W
Humidity30%
Visibility—
Dew point12°
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.