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As of 10:14 CDT

Weather in Portsmouth, IA

81°Current weather

Portsmouth, Sunday, 9 August, 10:14

Clear. Feels like 85°. High 97°, low 73°.

Pressure29.80 inHg
Wind13.2 mph SW
Humidity74%
Visibility6.2 mi
Dew point71°

10-day forecast for Portsmouth, IA: 62° to 107°, with precipitation expected on 4 days. The table below breaks each day into morning, afternoon, evening and overnight.

107°
Best day: Tuesday, August 11
76° · 0.62 in
Worst day: Thursday, August 13

Tap any day below to see morning, afternoon, evening and overnight.

Mon, 1088° / 69°0.01Light rain
MorningOvercast71°feels 72°
AfternoonOvercast80°feels 80°
EveningOvercast87°feels 90°
OvernightPartly cloudy74°feels 74°
88 °Light rain

Portsmouth, Monday, 10 August

Light rain. High 88°, low 69°.

Pressure29.83 inHg
Wind13 mph E
Humidity55%
Visibility6.2 mi
Dew point66°
Tue, 11107° / 71°0Overcast
MorningClear79°feels 79°
AfternoonOvercast104°feels 101°
EveningOvercast88°feels 86°
OvernightOvercast72°feels 73°
107 °Overcast

Portsmouth, Tuesday, 11 August

Overcast. High 107°, low 71°.

Pressure29.71 inHg
Wind10.3 mph SW
Humidity22%
Visibility6.2 mi
Dew point54°
Wed, 1297° / 68°0Overcast
MorningClear74°feels 74°
AfternoonOvercast95°feels 95°
EveningOvercast89°feels 91°
OvernightClear68°feels 69°
97 °Overcast

Portsmouth, Wednesday, 12 August

Overcast. High 97°, low 68°.

Pressure29.83 inHg
Wind12 mph E
Humidity40%
Visibility6.2 mi
Dew point63°
Thu, 1376° / 66°0.62Rain
MorningOvercast69°feels 70°
AfternoonRain73°feels 74°
EveningRain68°feels 69°
OvernightLight rain72°feels 73°
76 °Rain

Portsmouth, Thursday, 13 August

Rain. High 76°, low 66°.

Pressure29.85 inHg
Wind17.6 mph E
Humidity86%
Visibility—
Dew point68°
Fri, 1469° / 65°0.51Rain
MorningRain66°feels 67°
AfternoonRain68°feels 69°
EveningRain69°feels 70°
OvernightRain68°feels 69°
69 °Rain

Portsmouth, Friday, 14 August

Rain. High 69°, low 65°.

Pressure30.00 inHg
Wind17 mph E
Humidity90%
Visibility—
Dew point65°
Sat, 1579° / 66°0.15Light rain
MorningLight rain68°feels 69°
AfternoonLight rain74°feels 75°
EveningLight rain76°feels 77°
OvernightLight rain68°feels 69°
79 °Light rain

Portsmouth, Saturday, 15 August

Light rain. High 79°, low 66°.

Pressure30.03 inHg
Wind10.6 mph E
Humidity90%
Visibility—
Dew point69°
Sun, 1683° / 65°0Overcast
MorningOvercast69°feels 70°
AfternoonOvercast81°feels 82°
EveningOvercast77°feels 77°
OvernightOvercast67°feels 67°
83 °Overcast

Portsmouth, Sunday, 16 August

Overcast. High 83°, low 65°.

Pressure30.15 inHg
Wind12.1 mph N
Humidity50%
Visibility—
Dew point59°
Mon, 1774° / 62°0Overcast
MorningOvercast66°feels 65°
AfternoonOvercast72°feels 72°
EveningOvercast73°feels 73°
OvernightOvercast66°feels 65°
74 °Overcast

Portsmouth, Monday, 17 August

Overcast. High 74°, low 62°.

Pressure30.09 inHg
Wind10 mph SE
Humidity65%
Visibility—
Dew point58°
Tue, 1890° / 62°0.09Light rain
MorningLight rain68°feels 69°
AfternoonLight rain85°feels 87°
EveningLight rain84°feels 88°
OvernightLight rain73°feels 74°
90 °Light rain

Portsmouth, Tuesday, 18 August

Light rain. High 90°, low 62°.

Pressure29.80 inHg
Wind12.4 mph S
Humidity51%
Visibility—
Dew point62°

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 Portsmouth, IA 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.