EN
English Español

As of 01:08 CST

Weather in Portsmouth, IA

48°Current weather

Portsmouth, Thursday, 5 November, 01:08

Overcast. Feels like 43°. High 50°, low 42°.

Pressure29.77 inHg
Wind11.5 mph NW
Humidity87%
Visibility6.2 mi
Dew point44°
Fri, 0650° / 38°0Mostly clear
50 °Mostly clear

Portsmouth, Friday, 6 November

Mostly clear. High 50°, low 38°.

Pressure30.30 inHg
Wind3 mph N
Humidity58%
Visibility6.2 mi
Dew point34°
Sat, 0759° / 36°0Clear
59 °Clear

Portsmouth, Saturday, 7 November

Clear. High 59°, low 36°.

Pressure30.21 inHg
Wind9.4 mph SW
Humidity58%
Visibility6.2 mi
Dew point41°
Sun, 0863° / 44°0Clear
63 °Clear

Portsmouth, Sunday, 8 November

Clear. High 63°, low 44°.

Pressure30.18 inHg
Wind4.5 mph N
Humidity58%
Visibility6.2 mi
Dew point45°
Mon, 0966° / 46°0Clear
66 °Clear

Portsmouth, Monday, 9 November

Clear. High 66°, low 46°.

Pressure30.06 inHg
Wind11.7 mph S
Humidity55%
Visibility—
Dew point45°
Tue, 1059° / 43°0Overcast
59 °Overcast

Portsmouth, Tuesday, 10 November

Overcast. High 59°, low 43°.

Pressure30.12 inHg
Wind7 mph N
Humidity49%
Visibility—
Dew point36°
Wed, 1151° / 42°0Overcast
51 °Overcast

Portsmouth, Wednesday, 11 November

Overcast. High 51°, low 42°.

Pressure30.27 inHg
Wind8.5 mph NE
Humidity45%
Visibility—
Dew point29°
Thu, 1252° / 36°0Mostly clear
52 °Mostly clear

Portsmouth, Thursday, 12 November

Mostly clear. High 52°, low 36°.

Pressure30.30 inHg
Wind6.4 mph NE
Humidity49%
Visibility—
Dew point29°
Fri, 1359° / 39°0Clear
59 °Clear

Portsmouth, Friday, 13 November

Clear. High 59°, low 39°.

Pressure30.00 inHg
Wind12.1 mph S
Humidity52%
Visibility—
Dew point36°
Sat, 1465° / 47°0Mostly clear
65 °Mostly clear

Portsmouth, Saturday, 14 November

Mostly clear. High 65°, low 47°.

Pressure29.77 inHg
Wind14.1 mph SW
Humidity63%
Visibility—
Dew point47°
Sun, 1567° / 52°0Clear
67 °Clear

Portsmouth, Sunday, 15 November

Clear. High 67°, low 52°.

Pressure29.80 inHg
Wind13.7 mph SW
Humidity66%
Visibility—
Dew point51°
Mon, 1659° / 46°0.06Light rain
59 °Light rain

Portsmouth, Monday, 16 November

Light rain. High 59°, low 46°.

Pressure29.80 inHg
Wind8.9 mph NW
Humidity84%
Visibility—
Dew point52°
Tue, 1750° / 43°0Overcast
50 °Overcast

Portsmouth, Tuesday, 17 November

Overcast. High 50°, low 43°.

Pressure30.06 inHg
Wind17.9 mph NW
Humidity62%
Visibility—
Dew point36°
Wed, 1846° / 42°0.09Light rain
46 °Light rain

Portsmouth, Wednesday, 18 November

Light rain. High 46°, low 42°.

Pressure30.09 inHg
Wind14.5 mph SE
Humidity85%
Visibility—
Dew point40°
Thu, 1948° / 38°0.44Rain
48 °Rain

Portsmouth, Thursday, 19 November

Rain. High 48°, low 38°.

Pressure29.94 inHg
Wind16.4 mph N
Humidity85%
Visibility—
Dew point39°
Fri, 2038° / 29°0Overcast
38 °Overcast

Portsmouth, Friday, 20 November

Overcast. High 38°, low 29°.

Pressure30.47 inHg
Wind18.7 mph N
Humidity52%
Visibility—
Dew point18°

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.