10-day forecast for Grand Portage, MN: 54° to 73°, with precipitation expected on 4 days. The table below breaks each day into morning, afternoon, evening and overnight.
72°
Best day: Monday, August 10
72° · 0.85 in
Worst day: Tuesday, August 18
Tap any day below to see morning, afternoon, evening and overnight.
Mon, 1072° / 58°0
Morning63°feels 62°
Afternoon66°feels 65°
Evening65°feels 65°
Overnight59°feels 59°
72 °
Grand Portage, Monday, 10 August
Partly cloudy. High 72°, low 58°.
Pressure29.91 inHg
Wind8 mph S
Humidity52%
Visibility6.2 mi
Dew point50°
Tue, 1168° / 58°0
Morning63°feels 62°
Afternoon65°feels 65°
Evening59°feels 58°
Overnight63°feels 62°
68 °
Grand Portage, Tuesday, 11 August
Partly cloudy. High 68°, low 58°.
Pressure29.88 inHg
Wind7.9 mph E
Humidity64%
Visibility6.2 mi
Dew point52°
Wed, 1271° / 56°0
Morning61°feels 60°
Afternoon68°feels 67°
Evening64°feels 63°
Overnight58°feels 57°
71 °
Grand Portage, Wednesday, 12 August
Overcast. High 71°, low 56°.
Pressure29.91 inHg
Wind5.4 mph SW
Humidity48%
Visibility6.2 mi
Dew point47°
Thu, 1367° / 57°0
Morning61°feels 60°
Afternoon62°feels 61°
Evening62°feels 61°
Overnight58°feels 57°
67 °
Grand Portage, Thursday, 13 August
Partly cloudy. High 67°, low 57°.
Pressure30.00 inHg
Wind6 mph S
Humidity57%
Visibility6.2 mi
Dew point51°
Fri, 1465° / 54°0
Morning58°feels 57°
Afternoon64°feels 63°
Evening61°feels 60°
Overnight56°feels 55°
65 °
Grand Portage, Friday, 14 August
Overcast. High 65°, low 54°.
Pressure30.18 inHg
Wind7.4 mph SE
Humidity57%
Visibility—
Dew point48°
Sat, 1565° / 56°0.17
Morning60°feels 59°
Afternoon64°feels 64°
Evening58°feels 58°
Overnight57°feels 57°
65 °
Grand Portage, Saturday, 15 August
Light rain. High 65°, low 56°.
Pressure30.06 inHg
Wind7.9 mph NE
Humidity70%
Visibility—
Dew point54°
Sun, 1663° / 57°0.13
Morning59°feels 59°
Afternoon61°feels 61°
Evening63°feels 63°
Overnight59°feels 59°
63 °
Grand Portage, Sunday, 16 August
Light rain. High 63°, low 57°.
Pressure30.00 inHg
Wind7.6 mph S
Humidity95%
Visibility—
Dew point59°
Mon, 1766° / 57°0
Morning60°feels 60°
Afternoon66°feels 65°
Evening62°feels 62°
Overnight59°feels 59°
66 °
Grand Portage, Monday, 17 August
Overcast. High 66°, low 57°.
Pressure30.00 inHg
Wind6.2 mph NW
Humidity70%
Visibility—
Dew point55°
Tue, 1872° / 58°0.85
Morning61°feels 61°
Afternoon68°feels 68°
Evening68°feels 68°
Overnight65°feels 65°
72 °
Grand Portage, Tuesday, 18 August
Heavy rain. High 72°, low 58°.
Pressure29.74 inHg
Wind13.3 mph NW
Humidity69%
Visibility—
Dew point56°
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 Grand Portage, MN 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.