Weather in Portland, IA
Portland, Wednesday, 28 October, 19:17
Overcast. Feels like 67°. High 71°, low 53°.
Monthly outlook for Portland, IA: average high 53.1°, average low 41.9°. That is 1.8° above the climate normal for October. Precipitation is expected on 6 days (about 3.3 inches), against a normal of 4 days and 1.2 inches. The warmest day looks like 28 October (71.1°), the coolest 12 November (28.3°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 28 October – 6 November | 58.7° | 51.8° | +3.8° |
| 7 November – 16 November | 43.8° | 46.1° | -1.3° |
| 17 November – 26 November | at normal | 41.3° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Dougherty (15 mi).
0Portland, Thursday, 29 October
Overcast. High 61°, low 42°.
0Portland, Friday, 30 October
Overcast. High 57°, low 39°.
0Portland, Saturday, 31 October
Overcast. High 58°, low 45°.
0Portland, Sunday, 1 November
Overcast. High 66°, low 52°.
0.77
Portland, Monday, 2 November
Heavy rain. High 60°, low 55°.
1.04Portland, Tuesday, 3 November
Rain. High 61°, low 56°.
0.89Portland, Wednesday, 4 November
Rain. High 56°, low 54°.
0.13Portland, Thursday, 5 November
Light rain. High 54°, low 38°.
0
Portland, Friday, 6 November
Clear. High 42°, low 34°.
0Portland, Saturday, 7 November
Clear. High 45°, low 30°.
0.02Portland, Sunday, 8 November
Light rain. High 45°, low 40°.
0.11Portland, Monday, 9 November
Light rain. High 51°, low 40°.
0
Portland, Tuesday, 10 November
Partly cloudy. High 45°, low 35°.
0Portland, Wednesday, 11 November
Partly cloudy. High 36°, low 29°.
0Portland, Thursday, 12 November
Overcast. High 40°, low 28°.
0.06Portland, Friday, 13 November
Climate normal for this date — 60-year average.
0.02Portland, Saturday, 14 November
Climate normal for this date — 60-year average.
0.07Portland, Sunday, 15 November
Climate normal for this date — 60-year average.
0.06Portland, Monday, 16 November
Climate normal for this date — 60-year average.
0.09Portland, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.06Portland, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.09Portland, Thursday, 19 November
Climate normal for this date — 60-year average.
0.09Portland, Friday, 20 November
Climate normal for this date — 60-year average.
0.05
Portland, Saturday, 21 November
Climate normal for this date — 60-year average.
0.04Portland, Sunday, 22 November
Climate normal for this date — 60-year average.
0.09Portland, Monday, 23 November
Climate normal for this date — 60-year average.
0.04Portland, Tuesday, 24 November
Climate normal for this date — 60-year average.
0.03Portland, Wednesday, 25 November
Climate normal for this date — 60-year average.
0.07
Portland, Thursday, 26 November
Climate normal for this date — 60-year average.
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.
Sun and moon today
Weather history
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