10-day forecast for Grannis, MT: 26° to 72°, with precipitation expected on 2 days. The table below breaks each day into morning, afternoon, evening and overnight.
72°
Best day: Monday, October 19
50° · 0.73 in
Worst day: Friday, October 23
Tap any day below to see morning, afternoon, evening and overnight.
Tue, 2065° / 40°0
Morning41°feels 41°
Afternoon63°feels 60°
Evening54°feels 52°
Overnight45°feels 45°
65 °
Grannis, Tuesday, 20 October
Overcast. High 65°, low 40°.
Pressure30.06 inHg
Wind1.8 mph NW
Humidity33%
Visibility6.2 mi
Dew point30°
Wed, 2164° / 39°0.01
Morning39°feels 39°
Afternoon63°feels 61°
Evening52°feels 50°
Overnight43°feels 42°
64 °
Grannis, Wednesday, 21 October
Light rain. High 64°, low 39°.
Pressure30.06 inHg
Wind2.8 mph SE
Humidity53%
Visibility6.2 mi
Dew point39°
Thu, 2268° / 44°0
Morning44°feels 44°
Afternoon67°feels 65°
Evening55°feels 53°
Overnight47°feels 47°
68 °
Grannis, Thursday, 22 October
Partly cloudy. High 68°, low 44°.
Pressure29.88 inHg
Wind2.4 mph SE
Humidity45%
Visibility6.2 mi
Dew point40°
Fri, 2350° / 40°0.73
Morning48°feels 48°
Afternoon49°feels 47°
Evening42°feels 39°
Overnight49°feels 49°
50 °
Grannis, Friday, 23 October
Rain. High 50°, low 40°.
Pressure29.65 inHg
Wind0.5 mph SW
Humidity88%
Visibility2.5 mi
Dew point47°
Sat, 2452° / 36°0.06
Morning39°feels 39°
Afternoon47°feels 46°
Evening44°feels 43°
Overnight39°feels 39°
52 °
Grannis, Saturday, 24 October
Light rain. High 52°, low 36°.
Pressure30.12 inHg
Wind4.5 mph NE
Humidity58%
Visibility—
Dew point31°
Sun, 2558° / 33°0
Morning38°feels 35°
Afternoon50°feels 47°
Evening48°feels 47°
Overnight38°feels 38°
58 °
Grannis, Sunday, 25 October
Clear. High 58°, low 33°.
Pressure30.21 inHg
Wind5.8 mph SW
Humidity42%
Visibility—
Dew point26°
Mon, 2659° / 35°0
Morning40°feels 35°
Afternoon52°feels 48°
Evening44°feels 37°
Overnight35°feels 26°
59 °
Grannis, Monday, 26 October
Overcast. High 59°, low 35°.
Pressure30.15 inHg
Wind14.4 mph E
Humidity32%
Visibility—
Dew point22°
Tue, 2734° / 27°0
Morning29°feels 19°
Afternoon31°feels 23°
Evening31°feels 26°
Overnight29°feels 27°
34 °
Grannis, Tuesday, 27 October
Overcast. High 34°, low 27°.
Pressure30.62 inHg
Wind14.1 mph E
Humidity70%
Visibility—
Dew point22°
Wed, 2852° / 26°0
Morning31°feels 30°
Afternoon42°feels 41°
Evening43°feels 41°
Overnight37°feels 37°
52 °
Grannis, Wednesday, 28 October
Clear. High 52°, low 26°.
Pressure30.24 inHg
Wind4.8 mph E
Humidity51%
Visibility—
Dew point23°
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 Grannis, 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.