10-day forecast for Keystone, MT: 23° to 51°, with precipitation expected on 2 days. The table below breaks each day into morning, afternoon, evening and overnight.
51°
Best day: Sunday, November 8
38° · 0.08 in
Worst day: Sunday, November 1
Tap any day below to see morning, afternoon, evening and overnight.
Sat, 3144° / 29°0
Morning30°feels 30°
Afternoon42°feels 42°
Evening34°feels 34°
Overnight30°feels 30°
44 °
Keystone, Saturday, 31 October
Overcast. High 44°, low 29°.
Pressure30.06 inHg
Wind1.1 mph N
Humidity84%
Visibility—
Dew point37°
Sun, 0138° / 29°0.08
Morning31°feels 31°
Afternoon37°feels 37°
Evening32°feels 32°
Overnight31°feels 31°
38 °
Keystone, Sunday, 1 November
Snow. High 38°, low 29°.
Pressure29.97 inHg
Wind1 mph W
Humidity99%
Visibility5.2 mi
Dew point37°
Mon, 0243° / 27°0
Morning27°feels 27°
Afternoon40°feels 40°
Evening31°feels 31°
Overnight30°feels 30°
43 °
Keystone, Monday, 2 November
Overcast. High 43°, low 27°.
Pressure30.39 inHg
Wind2 mph SW
Humidity83%
Visibility6.2 mi
Dew point33°
Tue, 0345° / 27°0
Morning28°feels 28°
Afternoon43°feels 43°
Evening37°feels 37°
Overnight27°feels 27°
45 °
Keystone, Tuesday, 3 November
Overcast. High 45°, low 27°.
Pressure30.18 inHg
Wind1 mph NE
Humidity69%
Visibility6.2 mi
Dew point29°
Wed, 0448° / 26°0
Morning31°feels 31°
Afternoon40°feels 40°
Evening38°feels 38°
Overnight28°feels 28°
48 °
Keystone, Wednesday, 4 November
Clear. High 48°, low 26°.
Pressure30.15 inHg
Wind2.7 mph NE
Humidity63%
Visibility—
Dew point27°
Thu, 0546° / 27°0
Morning31°feels 31°
Afternoon42°feels 42°
Evening38°feels 38°
Overnight29°feels 29°
46 °
Keystone, Thursday, 5 November
Overcast. High 46°, low 27°.
Pressure29.94 inHg
Wind6.6 mph W
Humidity54%
Visibility—
Dew point25°
Fri, 0635° / 27°0.05
Morning31°feels 30°
Afternoon35°feels 32°
Evening32°feels 27°
Overnight27°feels 23°
35 °
Keystone, Friday, 6 November
Snow. High 35°, low 27°.
Pressure29.91 inHg
Wind5.3 mph SW
Humidity91%
Visibility—
Dew point32°
Sat, 0743° / 23°0
Morning27°feels 23°
Afternoon36°feels 36°
Evening34°feels 31°
Overnight26°feels 22°
43 °
Keystone, Saturday, 7 November
Partly cloudy. High 43°, low 23°.
Pressure30.42 inHg
Wind4.7 mph SW
Humidity60%
Visibility—
Dew point22°
Sun, 0851° / 26°0
Morning31°feels 28°
Afternoon43°feels 43°
Evening40°feels 38°
Overnight33°feels 29°
51 °
Keystone, Sunday, 8 November
Overcast. High 51°, low 26°.
Pressure30.24 inHg
Wind3.9 mph SE
Humidity32%
Visibility—
Dew point13°
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 Keystone, 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.