10-day forecast for Portland, MI: 51° to 87°, with precipitation expected on 3 days. The table below breaks each day into morning, afternoon, evening and overnight.
85°
Best day: Tuesday, August 18
84° · 0.44 in
Worst day: Tuesday, August 11
Tap any day below to see morning, afternoon, evening and overnight.
Mon, 1087° / 70°0.34
Morning72°feels 73°
Afternoon82°feels 86°
Evening80°feels 80°
Overnight72°feels 74°
87 °
Portland, Monday, 10 August
Rain. High 87°, low 70°.
Pressure29.91 inHg
Wind6.4 mph W
Humidity87%
Visibility6.2 mi
Dew point71°
Tue, 1184° / 62°0.44
Morning66°feels 65°
Afternoon67°feels 68°
Evening70°feels 71°
Overnight65°feels 65°
84 °
Portland, Tuesday, 11 August
Heavy rain. High 84°, low 62°.
Pressure29.88 inHg
Wind9.5 mph SE
Humidity41%
Visibility6.2 mi
Dew point58°
Wed, 1284° / 63°0
Morning66°feels 66°
Afternoon84°feels 85°
Evening75°feels 75°
Overnight65°feels 66°
84 °
Portland, Wednesday, 12 August
Clear. High 84°, low 63°.
Pressure29.77 inHg
Wind6.5 mph NW
Humidity61%
Visibility6.2 mi
Dew point64°
Thu, 1376° / 57°0
Morning62°feels 60°
Afternoon73°feels 72°
Evening66°feels 65°
Overnight60°feels 59°
76 °
Portland, Thursday, 13 August
Overcast. High 76°, low 57°.
Pressure30.00 inHg
Wind10 mph N
Humidity36%
Visibility—
Dew point43°
Fri, 1477° / 51°0
Morning60°feels 59°
Afternoon74°feels 73°
Evening67°feels 66°
Overnight58°feels 57°
77 °
Portland, Friday, 14 August
Clear. High 77°, low 51°.
Pressure30.15 inHg
Wind9.8 mph NE
Humidity34%
Visibility—
Dew point42°
Sat, 1578° / 52°0
Morning60°feels 59°
Afternoon75°feels 74°
Evening70°feels 69°
Overnight63°feels 62°
78 °
Portland, Saturday, 15 August
Overcast. High 78°, low 52°.
Pressure30.27 inHg
Wind8.2 mph E
Humidity34%
Visibility—
Dew point43°
Sun, 1678° / 61°0
Morning66°feels 65°
Afternoon76°feels 75°
Evening73°feels 72°
Overnight67°feels 67°
78 °
Portland, Sunday, 16 August
Overcast. High 78°, low 61°.
Pressure30.12 inHg
Wind7.2 mph SW
Humidity42%
Visibility—
Dew point49°
Mon, 1785° / 62°0
Morning68°feels 68°
Afternoon81°feels 80°
Evening75°feels 74°
Overnight65°feels 65°
85 °
Portland, Monday, 17 August
Partly cloudy. High 85°, low 62°.
Pressure30.03 inHg
Wind9.2 mph NE
Humidity35%
Visibility—
Dew point49°
Tue, 1885° / 58°0
Morning67°feels 66°
Afternoon83°feels 82°
Evening76°feels 75°
Overnight65°feels 65°
85 °
Portland, Tuesday, 18 August
Overcast. High 85°, low 58°.
Pressure30.00 inHg
Wind9.8 mph SW
Humidity38%
Visibility—
Dew point52°
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 Portland, MI 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.