10-day forecast for Summit, MT: 43° to 85°, with precipitation expected on 2 days. The table below breaks each day into morning, afternoon, evening and overnight.
85°
Best day: Monday, August 10
69° · 0.13 in
Worst day: Saturday, August 15
Tap any day below to see morning, afternoon, evening and overnight.
Sun, 0977° / 44°0
Morning51°feels 47°
Afternoon74°feels 72°
Evening67°feels 64°
Overnight49°feels 49°
77 °
Summit, Sunday, 9 August
Overcast. High 77°, low 44°.
Pressure29.85 inHg
Wind10.9 mph W
Humidity10%
Visibility6.2 mi
Dew point20°
Mon, 1085° / 43°0
Morning50°feels 46°
Afternoon83°feels 81°
Evening76°feels 74°
Overnight49°feels 48°
85 °
Summit, Monday, 10 August
Mostly clear. High 85°, low 43°.
Pressure29.80 inHg
Wind16.8 mph W
Humidity10%
Visibility6.2 mi
Dew point21°
Tue, 1183° / 47°0
Morning56°feels 53°
Afternoon80°feels 80°
Evening72°feels 70°
Overnight51°feels 47°
83 °
Summit, Tuesday, 11 August
Clear. High 83°, low 47°.
Pressure29.88 inHg
Wind10.1 mph W
Humidity9%
Visibility6.2 mi
Dew point17°
Wed, 1278° / 51°0.03
Morning57°feels 53°
Afternoon79°feels 79°
Evening68°feels 66°
Overnight53°feels 49°
78 °
Summit, Wednesday, 12 August
Light rain. High 78°, low 51°.
Pressure29.80 inHg
Wind1.3 mph NW
Humidity13%
Visibility6.2 mi
Dew point25°
Thu, 1378° / 46°0.02
Morning54°feels 54°
Afternoon74°feels 72°
Evening70°feels 67°
Overnight57°feels 55°
78 °
Summit, Thursday, 13 August
Light rain. High 78°, low 46°.
Pressure29.77 inHg
Wind7.8 mph NW
Humidity17%
Visibility—
Dew point24°
Fri, 1472° / 47°0.03
Morning53°feels 51°
Afternoon69°feels 67°
Evening69°feels 67°
Overnight51°feels 49°
72 °
Summit, Friday, 14 August
Light rain. High 72°, low 47°.
Pressure29.91 inHg
Wind7.4 mph S
Humidity35%
Visibility—
Dew point37°
Sat, 1569° / 45°0.13
Morning52°feels 51°
Afternoon68°feels 66°
Evening63°feels 61°
Overnight51°feels 50°
69 °
Summit, Saturday, 15 August
Light rain. High 69°, low 45°.
Pressure30.03 inHg
Wind12 mph W
Humidity34%
Visibility—
Dew point36°
Sun, 1678° / 47°0.08
Morning54°feels 53°
Afternoon70°feels 68°
Evening55°feels 53°
Overnight51°feels 49°
78 °
Summit, Sunday, 16 August
Light rain. High 78°, low 47°.
Pressure30.03 inHg
Wind10 mph NW
Humidity22%
Visibility—
Dew point29°
Mon, 1780° / 49°0
Morning56°feels 55°
Afternoon76°feels 75°
Evening76°feels 76°
Overnight61°feels 58°
80 °
Summit, Monday, 17 August
Light rain. High 80°, low 49°.
Pressure30.00 inHg
Wind9.2 mph NW
Humidity18%
Visibility—
Dew point26°
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.