Weather in Shannon, IL
Shannon, Friday, 13 November, 15:13
Overcast. Feels like 35°. High 42°, low 32°.
Monthly outlook for Shannon, IL: average high 43.7°, average low 29.2°. That is 0.1° above the climate normal for November. Precipitation is expected on 3 days (about 0.6 inches), against a normal of 4 days and 1.3 inches. The warmest day looks like 21 November (58.5°), the coolest 24 November (17.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 13 November – 22 November | 48.7° | 45° | +2.1° |
| 23 November – 2 December | 35.2° | 39.7° | -2.5° |
| 3 December – 12 December | at normal | 34.4° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Freeport (11 mi).
0
Shannon, Saturday, 14 November
Clear. High 45°, low 29°.
0Shannon, Sunday, 15 November
Clear. High 46°, low 27°.
0
Shannon, Monday, 16 November
Mostly clear. High 49°, low 29°.
0Shannon, Tuesday, 17 November
Overcast. High 52°, low 34°.
0Shannon, Wednesday, 18 November
Overcast. High 53°, low 35°.
0.15
Shannon, Thursday, 19 November
Rain. High 52°, low 42°.
0.29Shannon, Friday, 20 November
Rain. High 57°, low 38°.
0.14Shannon, Saturday, 21 November
Light rain. High 59°, low 36°.
0Shannon, Sunday, 22 November
Clear. High 33°, low 24°.
0
Shannon, Monday, 23 November
Partly cloudy. High 25°, low 19°.
0Shannon, Tuesday, 24 November
Clear. High 29°, low 17°.
0Shannon, Wednesday, 25 November
Clear. High 33°, low 19°.
0Shannon, Thursday, 26 November
Overcast. High 39°, low 25°.
0Shannon, Friday, 27 November
Partly cloudy. High 44°, low 29°.
0Shannon, Saturday, 28 November
Overcast. High 41°, low 29°.
0.07
Shannon, Sunday, 29 November
Climate normal for this date — 60-year average.
0.06Shannon, Monday, 30 November
Climate normal for this date — 60-year average.
0.11Shannon, Tuesday, 1 December
Climate normal for this date — 60-year average.
0.05Shannon, Wednesday, 2 December
Climate normal for this date — 60-year average.
0.09Shannon, Thursday, 3 December
Climate normal for this date — 60-year average.
0.06Shannon, Friday, 4 December
Climate normal for this date — 60-year average.
0.07Shannon, Saturday, 5 December
Climate normal for this date — 60-year average.
0.05Shannon, Sunday, 6 December
Climate normal for this date — 60-year average.
0.09Shannon, Monday, 7 December
Climate normal for this date — 60-year average.
0.07Shannon, Tuesday, 8 December
Climate normal for this date — 60-year average.
0.08Shannon, Wednesday, 9 December
Climate normal for this date — 60-year average.
0.07Shannon, Thursday, 10 December
Climate normal for this date — 60-year average.
0.09Shannon, Friday, 11 December
Climate normal for this date — 60-year average.
0.05Shannon, Saturday, 12 December
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 Shannon, 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 Shannon, 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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