Weather in Posen, IL
Posen, Tuesday, 20 October, 04:50
Clear. Feels like 42°. High 70°, low 42°.
Monthly outlook for Posen, IL: average high 59.1°, average low 43.2°. That is 1.5° above the climate normal for October. Precipitation is expected on 1 day (about 0.1 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 21 October (71.3°), the coolest 29 October (32.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 20 October – 29 October | 62.7° | 57.5° | +2.9° |
| 30 October – 8 November | 53.1° | 53.6° | -0.3° |
| 9 November – 18 November | at normal | 48.1° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Blue Island (2 mi).
0
Posen, Wednesday, 21 October
Clear. High 71°, low 43°.
0Posen, Thursday, 22 October
Clear. High 69°, low 48°.
0Posen, Friday, 23 October
Clear. High 65°, low 48°.
0Posen, Saturday, 24 October
Clear. High 65°, low 46°.
0
Posen, Sunday, 25 October
Overcast. High 70°, low 52°.
0.06
Posen, Monday, 26 October
Light rain. High 71°, low 54°.
0.01Posen, Tuesday, 27 October
Light rain. High 52°, low 40°.
0Posen, Wednesday, 28 October
Clear. High 42°, low 33°.
0Posen, Thursday, 29 October
Clear. High 52°, low 32°.
0Posen, Friday, 30 October
Overcast. High 53°, low 44°.
0Posen, Saturday, 31 October
Clear. High 54°, low 44°.
0Posen, Sunday, 1 November
Overcast. High 52°, low 42°.
0
Posen, Monday, 2 November
Mostly clear. High 50°, low 41°.
0Posen, Tuesday, 3 November
Clear. High 55°, low 40°.
0
Posen, Wednesday, 4 November
Partly cloudy. High 54°, low 42°.
0.13Posen, Thursday, 5 November
Climate normal for this date — 60-year average.
0.07Posen, Friday, 6 November
Climate normal for this date — 60-year average.
0.06Posen, Saturday, 7 November
Climate normal for this date — 60-year average.
0.06Posen, Sunday, 8 November
Climate normal for this date — 60-year average.
0.13
Posen, Monday, 9 November
Climate normal for this date — 60-year average.
0.13Posen, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.08Posen, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.06Posen, Thursday, 12 November
Climate normal for this date — 60-year average.
0.05Posen, Friday, 13 November
Climate normal for this date — 60-year average.
0.07Posen, Saturday, 14 November
Climate normal for this date — 60-year average.
0.1Posen, Sunday, 15 November
Climate normal for this date — 60-year average.
0.05Posen, Monday, 16 November
Climate normal for this date — 60-year average.
0.09Posen, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.15Posen, 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 Posen, IL 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 Posen, IL 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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