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As of 23:11 CDT

Weather in Portland, IA

65°Current weather

Portland, Saturday, 8 August, 23:11

Clear. Feels like 65°. High 79°, low 56°.

Pressure29.97 inHg
Wind8.4 mph SE
Humidity92%
Visibility6.2 mi
Dew point62°
Sun, 0980° / 65°0.21Rain
80 °Rain

Portland, Sunday, 9 August

Rain. High 80°, low 65°.

Pressure29.83 inHg
Wind13 mph SE
Humidity83%
Visibility6.2 mi
Dew point70°
Mon, 1084° / 68°0.14Rain
84 °Rain

Portland, Monday, 10 August

Rain. High 84°, low 68°.

Pressure29.88 inHg
Wind10.1 mph E
Humidity82%
Visibility6.2 mi
Dew point73°
Tue, 1182° / 66°0.02Light rain
82 °Light rain

Portland, Tuesday, 11 August

Light rain. High 82°, low 66°.

Pressure29.83 inHg
Wind6.5 mph N
Humidity72%
Visibility6.2 mi
Dew point68°
Wed, 1280° / 65°0Overcast
80 °Overcast

Portland, Wednesday, 12 August

Overcast. High 80°, low 65°.

Pressure29.91 inHg
Wind7.5 mph NE
Humidity62%
Visibility6.2 mi
Dew point64°
Thu, 1373° / 60°0Overcast
73 °Overcast

Portland, Thursday, 13 August

Overcast. High 73°, low 60°.

Pressure30.03 inHg
Wind7.9 mph E
Humidity75%
Visibility—
Dew point58°
Fri, 1476° / 57°0Overcast
76 °Overcast

Portland, Friday, 14 August

Overcast. High 76°, low 57°.

Pressure30.15 inHg
Wind6.4 mph E
Humidity57%
Visibility—
Dew point56°
Sat, 1566° / 57°0Overcast
66 °Overcast

Portland, Saturday, 15 August

Overcast. High 66°, low 57°.

Pressure30.24 inHg
Wind11.9 mph SE
Humidity76%
Visibility—
Dew point56°
Sun, 1673° / 57°0Overcast
73 °Overcast

Portland, Sunday, 16 August

Overcast. High 73°, low 57°.

Pressure30.12 inHg
Wind6.8 mph S
Humidity78%
Visibility—
Dew point61°
Mon, 1784° / 63°0.01Light rain
84 °Light rain

Portland, Monday, 17 August

Light rain. High 84°, low 63°.

Pressure30.03 inHg
Wind10 mph S
Humidity61%
Visibility—
Dew point65°
Tue, 1895° / 67°0.11Light rain
95 °Light rain

Portland, Tuesday, 18 August

Light rain. High 95°, low 67°.

Pressure29.88 inHg
Wind13.8 mph SW
Humidity50%
Visibility—
Dew point65°
Wed, 1974° / 60°0.22Rain
74 °Rain

Portland, Wednesday, 19 August

Rain. High 74°, low 60°.

Pressure30.06 inHg
Wind14.2 mph N
Humidity59%
Visibility—
Dew point54°
Thu, 2062° / 55°0.02Light rain
62 °Light rain

Portland, Thursday, 20 August

Light rain. High 62°, low 55°.

Pressure30.18 inHg
Wind6.7 mph E
Humidity89%
Visibility—
Dew point55°
Fri, 2174° / 51°0Overcast
74 °Overcast

Portland, Friday, 21 August

Overcast. High 74°, low 51°.

Pressure30.06 inHg
Wind12.4 mph SE
Humidity55%
Visibility—
Dew point52°
Sat, 2285° / 57°0.1Light rain
85 °Light rain

Portland, Saturday, 22 August

Light rain. High 85°, low 57°.

Pressure29.77 inHg
Wind13.5 mph W
Humidity59%
Visibility—
Dew point60°
Sun, 2382° / 58°0Clear
82 °Clear

Portland, Sunday, 23 August

Clear. High 82°, low 58°.

Pressure29.94 inHg
Wind11.9 mph NW
Humidity41%
Visibility—
Dew point50°

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 Portland, 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 Portland, 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.