Weather in Piasa, IL
Piasa, Sunday, 18 October, 14:35
Clear. Feels like 61°. High 63°, low 38°.
Monthly outlook for Piasa, IL: average high 69.5°, average low 49.5°. That is 4.3° above the climate normal for October. Precipitation is expected on 3 days (about 0.5 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 30 October (83°), the coolest 18 October (38.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 18 October – 27 October | 70° | 62.7° | +4.1° |
| 28 October – 6 November | 68.7° | 58.7° | +5.6° |
| 7 November – 16 November | at normal | 53.8° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Jerseyville (11 mi).
0
Piasa, Monday, 19 October
Overcast. High 67°, low 40°.
0Piasa, Tuesday, 20 October
Clear. High 69°, low 45°.
0
Piasa, Wednesday, 21 October
Mostly clear. High 70°, low 46°.
0Piasa, Thursday, 22 October
Clear. High 70°, low 48°.
0Piasa, Friday, 23 October
Clear. High 69°, low 49°.
0Piasa, Saturday, 24 October
Overcast. High 79°, low 54°.
0Piasa, Sunday, 25 October
Overcast. High 68°, low 54°.
0Piasa, Monday, 26 October
Overcast. High 72°, low 54°.
0Piasa, Tuesday, 27 October
Overcast. High 73°, low 55°.
0.23
Piasa, Wednesday, 28 October
Light rain. High 72°, low 61°.
0.13Piasa, Thursday, 29 October
Light rain. High 73°, low 61°.
0.13Piasa, Friday, 30 October
Light rain. High 83°, low 60°.
0.04Piasa, Saturday, 31 October
Light rain. High 70°, low 49°.
0Piasa, Sunday, 1 November
Clear. High 54°, low 39°.
0Piasa, Monday, 2 November
Clear. High 61°, low 38°.
0.11
Piasa, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.15Piasa, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.16
Piasa, Thursday, 5 November
Climate normal for this date — 60-year average.
0.09Piasa, Friday, 6 November
Climate normal for this date — 60-year average.
0.07Piasa, Saturday, 7 November
Climate normal for this date — 60-year average.
0.04Piasa, Sunday, 8 November
Climate normal for this date — 60-year average.
0.1Piasa, Monday, 9 November
Climate normal for this date — 60-year average.
0.14Piasa, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.1Piasa, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.08Piasa, Thursday, 12 November
Climate normal for this date — 60-year average.
0.06Piasa, Friday, 13 November
Climate normal for this date — 60-year average.
0.08Piasa, Saturday, 14 November
Climate normal for this date — 60-year average.
0.12Piasa, Sunday, 15 November
Climate normal for this date — 60-year average.
0.1Piasa, Monday, 16 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 Piasa, 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 Piasa, 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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