Weather in Summerville, IL
Summerville, Sunday, 15 November, 10:18
Partly cloudy. Feels like 45°. High 51°, low 26°.
Monthly outlook for Summerville, IL: average high 55°, average low 38.9°. That is 2.9° above the climate normal for November. Precipitation is expected on 2 days (about 0.4 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 19 November (66.3°), the coolest 15 November (26.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 15 November – 24 November | 56.8° | 51.4° | +3° |
| 25 November – 4 December | 52° | 46.3° | +3.2° |
| 5 December – 14 December | at normal | 42.4° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Jerseyville (12 mi).
0
Summerville, Monday, 16 November
Clear. High 56°, low 28°.
0Summerville, Tuesday, 17 November
Clear. High 56°, low 33°.
0
Summerville, Wednesday, 18 November
Overcast. High 59°, low 40°.
0Summerville, Thursday, 19 November
Clear. High 66°, low 48°.
0
Summerville, Friday, 20 November
Light rain. High 61°, low 49°.
0.08Summerville, Saturday, 21 November
Light rain. High 66°, low 48°.
0Summerville, Sunday, 22 November
Clear. High 56°, low 43°.
0Summerville, Monday, 23 November
Partly cloudy. High 48°, low 34°.
0Summerville, Tuesday, 24 November
Overcast. High 50°, low 33°.
0Summerville, Wednesday, 25 November
Overcast. High 52°, low 35°.
0Summerville, Thursday, 26 November
Overcast. High 61°, low 46°.
0.36Summerville, Friday, 27 November
Rain. High 50°, low 46°.
0Summerville, Saturday, 28 November
Clear. High 51°, low 40°.
0Summerville, Sunday, 29 November
Overcast. High 50°, low 36°.
0Summerville, Monday, 30 November
Overcast. High 48°, low 38°.
0.11Summerville, Tuesday, 1 December
Climate normal for this date — 60-year average.
0.08Summerville, Wednesday, 2 December
Climate normal for this date — 60-year average.
0.11Summerville, Thursday, 3 December
Climate normal for this date — 60-year average.
0.08Summerville, Friday, 4 December
Climate normal for this date — 60-year average.
0.08Summerville, Saturday, 5 December
Climate normal for this date — 60-year average.
0.06
Summerville, Sunday, 6 December
Climate normal for this date — 60-year average.
0.1Summerville, Monday, 7 December
Climate normal for this date — 60-year average.
0.07Summerville, Tuesday, 8 December
Climate normal for this date — 60-year average.
0.07Summerville, Wednesday, 9 December
Climate normal for this date — 60-year average.
0.11Summerville, Thursday, 10 December
Climate normal for this date — 60-year average.
0.09Summerville, Friday, 11 December
Climate normal for this date — 60-year average.
0.07Summerville, Saturday, 12 December
Climate normal for this date — 60-year average.
0.07Summerville, Sunday, 13 December
Climate normal for this date — 60-year average.
0.12Summerville, Monday, 14 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 Summerville, 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 Summerville, 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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