Weather in Portland, IA
Portland, Wednesday, 21 October, 04:13
Clear. Feels like 46°. High 72°, low 46°.
Monthly outlook for Portland, IA: average high 58.5°, average low 45.4°. That is 2.6° above the climate normal for October. Precipitation is expected on 5 days (about 1.5 inches), against a normal of 4 days and 1.3 inches. The warmest day looks like 22 October (73.8°), the coolest 30 October (35.3°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 21 October – 30 October | 60.7° | 55.6° | +2.8° |
| 31 October – 9 November | 54.9° | 50.2° | +2.6° |
| 10 November – 19 November | at normal | 44.8° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Dougherty (15 mi).
0
Portland, Thursday, 22 October
Clear. High 74°, low 43°.
0
Portland, Friday, 23 October
Partly cloudy. High 71°, low 53°.
0
Portland, Saturday, 24 October
Overcast. High 72°, low 57°.
0Portland, Sunday, 25 October
Overcast. High 70°, low 54°.
0.3
Portland, Monday, 26 October
Light rain. High 57°, low 45°.
0.06Portland, Tuesday, 27 October
Light rain. High 43°, low 40°.
0.24Portland, Wednesday, 28 October
Rain. High 49°, low 42°.
0
Portland, Thursday, 29 October
Mostly clear. High 48°, low 40°.
0Portland, Friday, 30 October
Clear. High 50°, low 35°.
0.06Portland, Saturday, 31 October
Light rain. High 50°, low 38°.
0.03Portland, Sunday, 1 November
Light rain. High 47°, low 43°.
0Portland, Monday, 2 November
Mostly clear. High 57°, low 42°.
0Portland, Tuesday, 3 November
Overcast. High 59°, low 45°.
0.77Portland, Wednesday, 4 November
Rain. High 60°, low 54°.
0.01Portland, Thursday, 5 November
Light rain. High 57°, low 50°.
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.
0.09Portland, Thursday, 19 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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