10-day forecast for Lanark, MT: 49° to 93°, with precipitation expected on 1 day. The table below breaks each day into morning, afternoon, evening and overnight.
93°
Best day: Monday, August 17
78° · 0.23 in
Worst day: Friday, August 14
Tap any day below to see morning, afternoon, evening and overnight.
Sun, 0987° / 53°0
Morning62°feels 60°
Afternoon85°feels 82°
Evening77°feels 76°
Overnight59°feels 57°
87 °
Lanark, Sunday, 9 August
Clear. High 87°, low 53°.
Pressure29.88 inHg
Wind11.2 mph E
Humidity28%
Visibility6.2 mi
Dew point45°
Mon, 1084° / 49°0
Morning58°feels 56°
Afternoon82°feels 81°
Evening76°feels 75°
Overnight53°feels 51°
84 °
Lanark, Monday, 10 August
Overcast. High 84°, low 49°.
Pressure29.88 inHg
Wind13.4 mph NE
Humidity31%
Visibility6.2 mi
Dew point44°
Tue, 1188° / 58°0
Morning66°feels 64°
Afternoon85°feels 82°
Evening80°feels 79°
Overnight62°feels 60°
88 °
Lanark, Tuesday, 11 August
Partly cloudy. High 88°, low 58°.
Pressure29.94 inHg
Wind7.9 mph E
Humidity28%
Visibility6.2 mi
Dew point44°
Wed, 1286° / 59°0
Morning65°feels 64°
Afternoon84°feels 82°
Evening83°feels 81°
Overnight64°feels 63°
86 °
Lanark, Wednesday, 12 August
Clear. High 86°, low 59°.
Pressure29.91 inHg
Wind16.5 mph E
Humidity31%
Visibility6.2 mi
Dew point47°
Thu, 1386° / 60°0
Morning65°feels 64°
Afternoon80°feels 80°
Evening84°feels 82°
Overnight75°feels 74°
86 °
Lanark, Thursday, 13 August
Overcast. High 86°, low 60°.
Pressure29.94 inHg
Wind19.4 mph E
Humidity31%
Visibility—
Dew point44°
Fri, 1478° / 66°0.23
Morning68°feels 68°
Afternoon73°feels 73°
Evening74°feels 75°
Overnight70°feels 70°
78 °
Lanark, Friday, 14 August
Light rain. High 78°, low 66°.
Pressure29.97 inHg
Wind15.5 mph E
Humidity66%
Visibility—
Dew point60°
Sat, 1579° / 58°0
Morning63°feels 62°
Afternoon75°feels 74°
Evening78°feels 78°
Overnight67°feels 66°
79 °
Lanark, Saturday, 15 August
Mostly clear. High 79°, low 58°.
Pressure30.15 inHg
Wind13 mph N
Humidity38%
Visibility—
Dew point45°
Sun, 1682° / 61°0
Morning66°feels 65°
Afternoon80°feels 80°
Evening80°feels 80°
Overnight71°feels 70°
82 °
Lanark, Sunday, 16 August
Partly cloudy. High 82°, low 61°.
Pressure30.06 inHg
Wind14.9 mph SE
Humidity42%
Visibility—
Dew point52°
Mon, 1793° / 66°0
Morning73°feels 72°
Afternoon93°feels 89°
Evening87°feels 84°
Overnight74°feels 73°
93 °
Lanark, Monday, 17 August
Clear. High 93°, low 66°.
Pressure29.80 inHg
Wind17.5 mph NW
Humidity17%
Visibility—
Dew point39°
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 Lanark, 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.