EN
English Español

As of 14:58 CST

Weather in Portsmouth, IA

66°Current weather

Portsmouth, Tuesday, 10 November, 14:58

Partly cloudy. Feels like 64°. High 66°, low 38°.

Pressure30.03 inHg
Wind4.1 mph S
Humidity41%
Visibility6.2 mi
Dew point42°
Wed, 1161° / 43°0Mostly clear
61 °Mostly clear

Portsmouth, Wednesday, 11 November

Mostly clear. High 61°, low 43°.

Pressure30.03 inHg
Wind15.1 mph NW
Humidity60%
Visibility6.2 mi
Dew point40°
Thu, 1244° / 31°0Overcast
44 °Overcast

Portsmouth, Thursday, 12 November

Overcast. High 44°, low 31°.

Pressure30.21 inHg
Wind10 mph N
Humidity64%
Visibility6.2 mi
Dew point29°
Fri, 1342° / 27°0Clear
42 °Clear

Portsmouth, Friday, 13 November

Clear. High 42°, low 27°.

Pressure30.21 inHg
Wind2.3 mph NE
Humidity67%
Visibility6.2 mi
Dew point25°
Sat, 1446° / 28°0Overcast
46 °Overcast

Portsmouth, Saturday, 14 November

Overcast. High 46°, low 28°.

Pressure30.15 inHg
Wind10.9 mph SE
Humidity61%
Visibility6.2 mi
Dew point27°
Sun, 1547° / 40°0Overcast
47 °Overcast

Portsmouth, Sunday, 15 November

Overcast. High 47°, low 40°.

Pressure30.27 inHg
Wind12.4 mph SE
Humidity58%
Visibility—
Dew point31°
Mon, 1649° / 39°0Overcast
49 °Overcast

Portsmouth, Monday, 16 November

Overcast. High 49°, low 39°.

Pressure30.47 inHg
Wind10.5 mph S
Humidity50%
Visibility—
Dew point28°
Tue, 1748° / 37°0Overcast
48 °Overcast

Portsmouth, Tuesday, 17 November

Overcast. High 48°, low 37°.

Pressure30.36 inHg
Wind14.4 mph S
Humidity53%
Visibility—
Dew point29°
Wed, 1849° / 40°0Overcast
49 °Overcast

Portsmouth, Wednesday, 18 November

Overcast. High 49°, low 40°.

Pressure30.12 inHg
Wind20.8 mph S
Humidity62%
Visibility—
Dew point33°
Thu, 1954° / 50°0Overcast
54 °Overcast

Portsmouth, Thursday, 19 November

Overcast. High 54°, low 50°.

Pressure30.03 inHg
Wind18.8 mph S
Humidity79%
Visibility—
Dew point46°
Fri, 2052° / 50°0.27Light rain
52 °Light rain

Portsmouth, Friday, 20 November

Light rain. High 52°, low 50°.

Pressure30.06 inHg
Wind15.9 mph SE
Humidity93%
Visibility—
Dew point49°
Sat, 2161° / 47°0.5Rain
61 °Rain

Portsmouth, Saturday, 21 November

Rain. High 61°, low 47°.

Pressure29.65 inHg
Wind21.5 mph SE
Humidity77%
Visibility—
Dew point50°
Sun, 2244° / 33°0.06Snow
44 °Snow

Portsmouth, Sunday, 22 November

Snow. High 44°, low 33°.

Pressure29.56 inHg
Wind15.8 mph W
Humidity89%
Visibility—
Dew point38°
Mon, 2340° / 32°0.03Light snow
40 °Light snow

Portsmouth, Monday, 23 November

Light snow. High 40°, low 32°.

Pressure29.77 inHg
Wind19 mph NW
Humidity54%
Visibility—
Dew point22°
Tue, 2432° / 25°0Overcast
32 °Overcast

Portsmouth, Tuesday, 24 November

Overcast. High 32°, low 25°.

Pressure30.21 inHg
Wind19.2 mph NW
Humidity57%
Visibility—
Dew point18°
Wed, 2533° / 23°0Clear
33 °Clear

Portsmouth, Wednesday, 25 November

Clear. High 33°, low 23°.

Pressure30.33 inHg
Wind12.8 mph NW
Humidity50%
Visibility—
Dew point13°

About the monthly outlook

How accurate is a 30-day forecast?

The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Portsmouth, IA are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.

What does "above normal" mean?

We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.

Where do the 66-year records come from?

They are real temperature extremes recorded in Portsmouth, IA since 1960: the highest and lowest reading for each calendar date, with the year it happened.

How often is it updated?

The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.