10-day forecast for Keystone, MT: 25° to 48°, with precipitation expected on 1 day. The table below breaks each day into morning, afternoon, evening and overnight.
48°
Best day: Sunday, November 1
48° · 0.23 in
Worst day: Saturday, November 7
Tap any day below to see morning, afternoon, evening and overnight.
Fri, 3045° / 27°0
Morning27°feels 27°
Afternoon43°feels 42°
Evening33°feels 33°
Overnight28°feels 28°
45 °
Keystone, Friday, 30 October
Partly cloudy. High 45°, low 27°.
Pressure30.00 inHg
Wind2.7 mph NE
Humidity69%
Visibility6.2 mi
Dew point31°
Sat, 3148° / 29°0
Morning29°feels 29°
Afternoon47°feels 47°
Evening36°feels 36°
Overnight33°feels 33°
48 °
Keystone, Saturday, 31 October
Light rain. High 48°, low 29°.
Pressure30.06 inHg
Wind1.1 mph N
Humidity74%
Visibility6.2 mi
Dew point36°
Sun, 0148° / 28°0
Morning31°feels 31°
Afternoon45°feels 45°
Evening36°feels 36°
Overnight30°feels 30°
48 °
Keystone, Sunday, 1 November
Overcast. High 48°, low 28°.
Pressure30.09 inHg
Wind0.8 mph S
Humidity82%
Visibility6.2 mi
Dew point36°
Mon, 0245° / 25°0
Morning29°feels 29°
Afternoon38°feels 38°
Evening38°feels 38°
Overnight26°feels 26°
45 °
Keystone, Monday, 2 November
Mostly clear. High 45°, low 25°.
Pressure30.42 inHg
Wind1.9 mph S
Humidity73%
Visibility—
Dew point28°
Tue, 0348° / 27°0
Morning34°feels 34°
Afternoon43°feels 43°
Evening35°feels 35°
Overnight28°feels 28°
48 °
Keystone, Tuesday, 3 November
Partly cloudy. High 48°, low 27°.
Pressure30.27 inHg
Wind2.1 mph S
Humidity54%
Visibility—
Dew point27°
Wed, 0443° / 26°0
Morning29°feels 29°
Afternoon38°feels 38°
Evening34°feels 34°
Overnight30°feels 30°
43 °
Keystone, Wednesday, 4 November
Overcast. High 43°, low 26°.
Pressure30.03 inHg
Wind2.8 mph SE
Humidity58%
Visibility—
Dew point23°
Thu, 0544° / 30°0
Morning34°feels 31°
Afternoon40°feels 38°
Evening35°feels 32°
Overnight31°feels 27°
44 °
Keystone, Thursday, 5 November
Overcast. High 44°, low 30°.
Pressure30.00 inHg
Wind4.3 mph W
Humidity61%
Visibility—
Dew point27°
Fri, 0645° / 28°0
Morning32°feels 32°
Afternoon42°feels 42°
Evening38°feels 38°
Overnight30°feels 28°
45 °
Keystone, Friday, 6 November
Mostly clear. High 45°, low 28°.
Pressure30.06 inHg
Wind4.2 mph SW
Humidity63%
Visibility—
Dew point29°
Sat, 0748° / 30°0.23
Morning35°feels 32°
Afternoon44°feels 42°
Evening38°feels 34°
Overnight33°feels 28°
48 °
Keystone, Saturday, 7 November
Rain. High 48°, low 30°.
Pressure29.88 inHg
Wind7.4 mph SW
Humidity59%
Visibility—
Dew point29°
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.