10-day forecast for Portland, IN: 56° to 91°, with precipitation expected on 6 days. The table below breaks each day into morning, afternoon, evening and overnight.
88°
Best day: Sunday, August 9
87° · 1.35 in
Worst day: Tuesday, August 11
Tap any day below to see morning, afternoon, evening and overnight.
Mon, 1091° / 70°1.15
Morning71°feels 73°
Afternoon89°feels 101°
Evening82°feels 90°
Overnight76°feels 77°
91 °
Portland, Monday, 10 August
Heavy rain. High 91°, low 70°.
Pressure29.94 inHg
Wind16.8 mph SW
Humidity78%
Visibility6.2 mi
Dew point74°
Tue, 1187° / 68°1.35
Morning72°feels 73°
Afternoon86°feels 96°
Evening72°feels 74°
Overnight69°feels 70°
87 °
Portland, Tuesday, 11 August
Heavy rain. High 87°, low 68°.
Pressure29.91 inHg
Wind10.2 mph SW
Humidity79%
Visibility6.2 mi
Dew point75°
Wed, 1282° / 66°0.31
Morning71°feels 72°
Afternoon82°feels 87°
Evening70°feels 71°
Overnight71°feels 73°
82 °
Portland, Wednesday, 12 August
Rain. High 82°, low 66°.
Pressure29.80 inHg
Wind3.8 mph N
Humidity79%
Visibility6.2 mi
Dew point72°
Thu, 1374° / 61°0
Morning65°feels 65°
Afternoon73°feels 74°
Evening68°feels 68°
Overnight66°feels 67°
74 °
Portland, Thursday, 13 August
Overcast. High 74°, low 61°.
Pressure30.00 inHg
Wind8 mph N
Humidity69%
Visibility—
Dew point62°
Fri, 1472° / 56°0.11
Morning61°feels 61°
Afternoon70°feels 70°
Evening65°feels 65°
Overnight60°feels 59°
72 °
Portland, Friday, 14 August
Light rain. High 72°, low 56°.
Pressure30.15 inHg
Wind8 mph NW
Humidity66%
Visibility—
Dew point57°
Sat, 1573° / 58°0
Morning62°feels 62°
Afternoon69°feels 69°
Evening66°feels 66°
Overnight61°feels 61°
73 °
Portland, Saturday, 15 August
Overcast. High 73°, low 58°.
Pressure30.27 inHg
Wind7.7 mph E
Humidity68%
Visibility—
Dew point57°
Sun, 1673° / 58°0.06
Morning63°feels 63°
Afternoon71°feels 71°
Evening68°feels 69°
Overnight63°feels 63°
73 °
Portland, Sunday, 16 August
Light rain. High 73°, low 58°.
Pressure30.12 inHg
Wind8 mph SE
Humidity70%
Visibility—
Dew point59°
Mon, 1778° / 63°0.04
Morning68°feels 69°
Afternoon75°feels 76°
Evening71°feels 72°
Overnight66°feels 66°
78 °
Portland, Monday, 17 August
Light rain. High 78°, low 63°.
Pressure30.06 inHg
Wind6.6 mph N
Humidity76%
Visibility—
Dew point66°
Tue, 1880° / 61°0
Morning68°feels 68°
Afternoon78°feels 78°
Evening72°feels 73°
Overnight67°feels 67°
80 °
Portland, Tuesday, 18 August
Clear. High 80°, low 61°.
Pressure30.06 inHg
Wind4 mph SE
Humidity63%
Visibility—
Dew point63°
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, IN 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.