10-day forecast for Summit, MT: 13° to 59°, with precipitation expected on 2 days. The table below breaks each day into morning, afternoon, evening and overnight.
59°
Best day: Saturday, October 17
39° · 0.73 in
Worst day: Friday, October 23
Tap any day below to see morning, afternoon, evening and overnight.
Fri, 1652° / 22°0
Morning24°feels 24°
Afternoon50°feels 50°
Evening36°feels 34°
Overnight23°feels 23°
52 °
Summit, Friday, 16 October
Partly cloudy. High 52°, low 22°.
Pressure30.47 inHg
Wind2.2 mph NW
Humidity40%
Visibility6.2 mi
Dew point21°
Sat, 1759° / 27°0
Morning28°feels 28°
Afternoon58°feels 55°
Evening39°feels 35°
Overnight28°feels 28°
59 °
Summit, Saturday, 17 October
Overcast. High 59°, low 27°.
Pressure30.15 inHg
Wind3.3 mph SW
Humidity38%
Visibility6.2 mi
Dew point29°
Sun, 1857° / 33°0
Morning35°feels 35°
Afternoon56°feels 53°
Evening42°feels 42°
Overnight34°feels 34°
57 °
Summit, Sunday, 18 October
Partly cloudy. High 57°, low 33°.
Pressure30.06 inHg
Wind2.6 mph W
Humidity49%
Visibility6.2 mi
Dew point34°
Mon, 1958° / 33°0
Morning36°feels 36°
Afternoon57°feels 54°
Evening49°feels 46°
Overnight34°feels 34°
58 °
Summit, Monday, 19 October
Mostly clear. High 58°, low 33°.
Pressure29.85 inHg
Wind5.4 mph S
Humidity41%
Visibility6.2 mi
Dew point33°
Tue, 2055° / 37°0.06
Morning42°feels 41°
Afternoon52°feels 49°
Evening45°feels 43°
Overnight39°feels 39°
55 °
Summit, Tuesday, 20 October
Light rain. High 55°, low 37°.
Pressure29.83 inHg
Wind5.3 mph NW
Humidity54%
Visibility—
Dew point35°
Wed, 2154° / 35°0
Morning39°feels 39°
Afternoon48°feels 48°
Evening49°feels 48°
Overnight42°feels 40°
54 °
Summit, Wednesday, 21 October
Partly cloudy. High 54°, low 35°.
Pressure30.00 inHg
Wind4.1 mph S
Humidity66%
Visibility—
Dew point35°
Thu, 2254° / 37°0.02
Morning41°feels 37°
Afternoon50°feels 47°
Evening45°feels 40°
Overnight38°feels 34°
54 °
Summit, Thursday, 22 October
Light rain. High 54°, low 37°.
Pressure29.77 inHg
Wind12.3 mph S
Humidity44%
Visibility—
Dew point28°
Fri, 2339° / 23°0.73
Morning28°feels 26°
Afternoon28°feels 21°
Evening26°feels 19°
Overnight24°feels 19°
39 °
Summit, Friday, 23 October
Snow. High 39°, low 23°.
Pressure30.00 inHg
Wind8.4 mph NW
Humidity78%
Visibility—
Dew point22°
Sat, 2427° / 13°0.02
Morning16°feels 16°
Afternoon23°feels 22°
Evening20°feels 15°
Overnight14°feels 7°
27 °
Summit, Saturday, 24 October
Light snow. High 27°, low 13°.
Pressure30.53 inHg
Wind5.8 mph S
Humidity66%
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.