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As of 13:09 CST

Weather in Portsmouth, IA

53°Current weather

Portsmouth, Tuesday, 3 November, 13:09

Overcast. Feels like 52°. High 62°, low 53°.

Pressure29.68 inHg
Wind15.7 mph N
Humidity93%
Visibility4.5 mi
Dew point51°
Wed, 0452° / 49°0Light rain
52 °Light rain

Portsmouth, Wednesday, 4 November

Light rain. High 52°, low 49°.

Pressure29.77 inHg
Wind16 mph W
Humidity70%
Visibility6.2 mi
Dew point41°
Thu, 0553° / 42°0Overcast
53 °Overcast

Portsmouth, Thursday, 5 November

Overcast. High 53°, low 42°.

Pressure29.94 inHg
Wind11.4 mph NW
Humidity60%
Visibility6.2 mi
Dew point39°
Fri, 0651° / 37°0Overcast
51 °Overcast

Portsmouth, Friday, 6 November

Overcast. High 51°, low 37°.

Pressure30.24 inHg
Wind4.2 mph N
Humidity64%
Visibility6.2 mi
Dew point37°
Sat, 0759° / 37°0Partly cloudy
59 °Partly cloudy

Portsmouth, Saturday, 7 November

Partly cloudy. High 59°, low 37°.

Pressure30.15 inHg
Wind8.4 mph SW
Humidity59%
Visibility6.2 mi
Dew point41°
Sun, 0862° / 43°0Clear
62 °Clear

Portsmouth, Sunday, 8 November

Clear. High 62°, low 43°.

Pressure30.15 inHg
Wind7.9 mph S
Humidity58%
Visibility—
Dew point42°
Mon, 0965° / 48°0Mostly clear
65 °Mostly clear

Portsmouth, Monday, 9 November

Mostly clear. High 65°, low 48°.

Pressure29.85 inHg
Wind15.9 mph SW
Humidity53%
Visibility—
Dew point44°
Tue, 1055° / 45°0Overcast
55 °Overcast

Portsmouth, Tuesday, 10 November

Overcast. High 55°, low 45°.

Pressure30.18 inHg
Wind12 mph N
Humidity37%
Visibility—
Dew point27°
Wed, 1155° / 42°0Mostly clear
55 °Mostly clear

Portsmouth, Wednesday, 11 November

Mostly clear. High 55°, low 42°.

Pressure30.27 inHg
Wind8.1 mph N
Humidity38%
Visibility—
Dew point28°
Thu, 1249° / 35°0Clear
49 °Clear

Portsmouth, Thursday, 12 November

Clear. High 49°, low 35°.

Pressure30.30 inHg
Wind6.1 mph NE
Humidity48%
Visibility—
Dew point27°
Fri, 1352° / 36°0Clear
52 °Clear

Portsmouth, Friday, 13 November

Clear. High 52°, low 36°.

Pressure30.18 inHg
Wind10.5 mph S
Humidity51%
Visibility—
Dew point30°
Sat, 1454° / 37°0Clear
54 °Clear

Portsmouth, Saturday, 14 November

Clear. High 54°, low 37°.

Pressure30.12 inHg
Wind14.9 mph S
Humidity46%
Visibility—
Dew point29°
Sun, 1553° / 40°0Overcast
53 °Overcast

Portsmouth, Sunday, 15 November

Overcast. High 53°, low 40°.

Pressure29.85 inHg
Wind20.2 mph SE
Humidity52%
Visibility—
Dew point33°
Mon, 1648° / 45°0.19Light rain
48 °Light rain

Portsmouth, Monday, 16 November

Light rain. High 48°, low 45°.

Pressure29.59 inHg
Wind16.8 mph SE
Humidity86%
Visibility—
Dew point43°
Tue, 1752° / 45°0.01Light rain
52 °Light rain

Portsmouth, Tuesday, 17 November

Light rain. High 52°, low 45°.

Pressure29.77 inHg
Wind9.6 mph NW
Humidity69%
Visibility—
Dew point41°
Wed, 1851° / 43°0.22Rain
51 °Rain

Portsmouth, Wednesday, 18 November

Rain. High 51°, low 43°.

Pressure29.71 inHg
Wind24.9 mph SE
Humidity72%
Visibility—
Dew point41°

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.