10-day forecast for Keystone, MT: 24° to 61°, with precipitation expected on 0 days. The table below breaks each day into morning, afternoon, evening and overnight.
61°
Best day: Thursday, October 22
45°
Worst day: Saturday, October 24
Tap any day below to see morning, afternoon, evening and overnight.
Sat, 1758° / 31°0
Morning31°feels 31°
Afternoon58°feels 55°
Evening42°feels 42°
Overnight35°feels 35°
58 °
Keystone, Saturday, 17 October
Partly cloudy. High 58°, low 31°.
Pressure30.03 inHg
Wind6.6 mph SW
Humidity31%
Visibility6.2 mi
Dew point31°
Sun, 1854° / 26°0
Morning26°feels 26°
Afternoon53°feels 50°
Evening41°feels 41°
Overnight32°feels 32°
54 °
Keystone, Sunday, 18 October
Clear. High 54°, low 26°.
Pressure30.12 inHg
Wind0.2 mph SE
Humidity51%
Visibility6.2 mi
Dew point34°
Mon, 1961° / 30°0
Morning30°feels 30°
Afternoon58°feels 56°
Evening46°feels 46°
Overnight33°feels 33°
61 °
Keystone, Monday, 19 October
Overcast. High 61°, low 30°.
Pressure29.88 inHg
Wind1.5 mph N
Humidity56%
Visibility6.2 mi
Dew point38°
Tue, 2057° / 35°0
Morning35°feels 35°
Afternoon55°feels 53°
Evening47°feels 47°
Overnight36°feels 36°
57 °
Keystone, Tuesday, 20 October
Overcast. High 57°, low 35°.
Pressure30.03 inHg
Wind1 mph N
Humidity57%
Visibility6.2 mi
Dew point39°
Wed, 2160° / 34°0
Morning39°feels 38°
Afternoon53°feels 50°
Evening53°feels 52°
Overnight43°feels 43°
60 °
Keystone, Wednesday, 21 October
Clear. High 60°, low 34°.
Pressure30.06 inHg
Wind1.3 mph NE
Humidity55%
Visibility—
Dew point34°
Thu, 2261° / 34°0
Morning40°feels 39°
Afternoon56°feels 53°
Evening50°feels 48°
Overnight41°feels 41°
61 °
Keystone, Thursday, 22 October
Clear. High 61°, low 34°.
Pressure29.85 inHg
Wind2.6 mph W
Humidity42%
Visibility—
Dew point31°
Fri, 2348° / 33°0
Morning39°feels 38°
Afternoon45°feels 44°
Evening41°feels 39°
Overnight33°feels 31°
48 °
Keystone, Friday, 23 October
Overcast. High 48°, low 33°.
Pressure30.06 inHg
Wind5.1 mph NE
Humidity39%
Visibility—
Dew point21°
Sat, 2445° / 27°0
Morning31°feels 30°
Afternoon41°feels 38°
Evening38°feels 36°
Overnight29°feels 29°
45 °
Keystone, Saturday, 24 October
Clear. High 45°, low 27°.
Pressure30.33 inHg
Wind6.7 mph NE
Humidity45%
Visibility—
Dew point20°
Sun, 2551° / 24°0
Morning29°feels 27°
Afternoon43°feels 43°
Evening42°feels 41°
Overnight32°feels 28°
51 °
Keystone, Sunday, 25 October
Clear. High 51°, low 24°.
Pressure30.12 inHg
Wind4.3 mph SW
Humidity30%
Visibility—
Dew point11°
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.