Weather in Piasa, IL
Piasa, Tuesday, 27 October, 00:10
Overcast. Feels like 59°. High 76°, low 51°.
Monthly outlook for Piasa, IL: average high 61.5°, average low 47.7°. That is 2° above the climate normal for October. Precipitation is expected on 8 days (about 2.8 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 28 October (79°), the coolest 7 November (28.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 27 October – 5 November | 68.1° | 59.2° | +5° |
| 6 November – 15 November | 50.4° | 54.2° | -2.1° |
| 16 November – 25 November | at normal | 51° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Jerseyville (11 mi).
0
Piasa, Wednesday, 28 October
Clear. High 79°, low 50°.
0.02
Piasa, Thursday, 29 October
Light rain. High 78°, low 58°.
0.01Piasa, Friday, 30 October
Light rain. High 74°, low 59°.
0.04Piasa, Saturday, 31 October
Light rain. High 68°, low 61°.
0.62Piasa, Sunday, 1 November
Rain. High 68°, low 58°.
0.19Piasa, Monday, 2 November
Light rain. High 65°, low 55°.
0.35Piasa, Tuesday, 3 November
Light rain. High 67°, low 60°.
0.9Piasa, Wednesday, 4 November
Rain. High 59°, low 47°.
0.04Piasa, Thursday, 5 November
Light rain. High 48°, low 38°.
0Piasa, Friday, 6 November
Overcast. High 41°, low 32°.
0Piasa, Saturday, 7 November
Clear. High 46°, low 29°.
0Piasa, Sunday, 8 November
Overcast. High 55°, low 32°.
0.44Piasa, Monday, 9 November
Rain. High 53°, low 49°.
0.08Piasa, Tuesday, 10 November
Light rain. High 61°, low 44°.
0.09Piasa, Wednesday, 11 November
Light rain. High 47°, low 40°.
0.08
Piasa, Thursday, 12 November
Climate normal for this date — 60-year average.
0.06
Piasa, 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.
0.13Piasa, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.16
Piasa, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.09Piasa, Thursday, 19 November
Climate normal for this date — 60-year average.
0.11Piasa, Friday, 20 November
Climate normal for this date — 60-year average.
0.1Piasa, Saturday, 21 November
Climate normal for this date — 60-year average.
0.08Piasa, Sunday, 22 November
Climate normal for this date — 60-year average.
0.09Piasa, Monday, 23 November
Climate normal for this date — 60-year average.
0.13Piasa, Tuesday, 24 November
Climate normal for this date — 60-year average.
0.13Piasa, Wednesday, 25 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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