Weather in Portland, IA
Portland, Tuesday, 20 October, 00:51
Clear. Feels like 45°. High 70°, low 40°.
Monthly outlook for Portland, IA: average high 59.9°, average low 43°. That is 3° above the climate normal for October. Precipitation is expected on 1 day (about 0.1 inches), against a normal of 4 days and 1.3 inches. The warmest day looks like 21 October (70.7°), the coolest 28 October (23.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 20 October – 29 October | 60.5° | 56° | +2.5° |
| 30 October – 8 November | 58.9° | 50.9° | +4.5° |
| 9 November – 18 November | at normal | 45.2° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Dougherty (15 mi).
0
Portland, Wednesday, 21 October
Mostly clear. High 71°, low 44°.
0
Portland, Thursday, 22 October
Clear. High 70°, low 48°.
0Portland, Friday, 23 October
Mostly clear. High 68°, low 51°.
0
Portland, Saturday, 24 October
Partly cloudy. High 70°, low 56°.
0
Portland, Sunday, 25 October
Overcast. High 67°, low 54°.
0Portland, Monday, 26 October
Overcast. High 51°, low 41°.
0Portland, Tuesday, 27 October
Clear. High 42°, low 32°.
0Portland, Wednesday, 28 October
Clear. High 42°, low 23°.
0Portland, Thursday, 29 October
Clear. High 52°, low 30°.
0Portland, Friday, 30 October
Clear. High 57°, low 37°.
0Portland, Saturday, 31 October
Clear. High 63°, low 43°.
0.13
Portland, Sunday, 1 November
Light rain. High 60°, low 51°.
0.01Portland, Monday, 2 November
Light rain. High 58°, low 51°.
0Portland, Tuesday, 3 November
Clear. High 59°, low 45°.
0Portland, Wednesday, 4 November
Overcast. High 56°, low 42°.
0.07Portland, Thursday, 5 November
Climate normal for this date — 60-year average.
0.07Portland, Friday, 6 November
Climate normal for this date — 60-year average.
0.02Portland, Saturday, 7 November
Climate normal for this date — 60-year average.
0.03Portland, Sunday, 8 November
Climate normal for this date — 60-year average.
0.13Portland, Monday, 9 November
Climate normal for this date — 60-year average.
0.1Portland, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.07Portland, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.07Portland, Thursday, 12 November
Climate normal for this date — 60-year average.
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.
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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