Weather in Griswold, IL
Griswold, Sunday, 11 October, 13:56
Clear. Feels like 80°. High 80°, low 53°.
Monthly outlook for Griswold, IL: average high 67.6°, average low 51.8°. That is 3.1° above the climate normal for October. Precipitation is expected on 4 days (about 1.9 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 13 October (84.5°), the coolest 18 October (32.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 11 October – 20 October | 67.7° | 63.2° | +2.5° |
| 21 October – 30 October | 67.5° | 59.5° | +4.4° |
| 31 October – 9 November | at normal | 55.1° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Cabery (10 mi).
0
Griswold, Monday, 12 October
Overcast. High 84°, low 64°.
0
Griswold, Tuesday, 13 October
Mostly clear. High 84°, low 70°.
0.08
Griswold, Wednesday, 14 October
Rain. High 75°, low 62°.
0.68Griswold, Thursday, 15 October
Rain. High 68°, low 59°.
0.2Griswold, Friday, 16 October
Rain. High 61°, low 49°.
0Griswold, Saturday, 17 October
Clear. High 44°, low 34°.
0Griswold, Sunday, 18 October
Mostly clear. High 53°, low 32°.
0Griswold, Monday, 19 October
Overcast. High 62°, low 42°.
0
Griswold, Tuesday, 20 October
Partly cloudy. High 66°, low 46°.
0Griswold, Wednesday, 21 October
Overcast. High 66°, low 50°.
0Griswold, Thursday, 22 October
Overcast. High 68°, low 53°.
0.01Griswold, Friday, 23 October
Light rain. High 74°, low 57°.
0.01Griswold, Saturday, 24 October
Light rain. High 68°, low 56°.
0.95Griswold, Sunday, 25 October
Heavy rain. High 77°, low 55°.
0Griswold, Monday, 26 October
Overcast. High 53°, low 46°.
0.09
Griswold, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.05Griswold, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.06Griswold, Thursday, 29 October
Climate normal for this date — 60-year average.
0.11Griswold, Friday, 30 October
Climate normal for this date — 60-year average.
0.16Griswold, Saturday, 31 October
Climate normal for this date — 60-year average.
0.18Griswold, Sunday, 1 November
Climate normal for this date — 60-year average.
0.09Griswold, Monday, 2 November
Climate normal for this date — 60-year average.
0.07Griswold, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.09Griswold, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.12Griswold, Thursday, 5 November
Climate normal for this date — 60-year average.
0.07Griswold, Friday, 6 November
Climate normal for this date — 60-year average.
0.06Griswold, Saturday, 7 November
Climate normal for this date — 60-year average.
0.05Griswold, Sunday, 8 November
Climate normal for this date — 60-year average.
0.15Griswold, Monday, 9 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 Griswold, 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 Griswold, 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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