Weather in Summerville, IL
Summerville, Monday, 9 November, 07:02
Clear. Feels like 36°. High 69°, low 38°.
Monthly outlook for Summerville, IL: average high 58.4°, average low 43.7°. That is 3.5° above the climate normal for November. Precipitation is expected on 3 days (about 1.6 inches), against a normal of 4 days and 1.7 inches. The warmest day looks like 17 November (71.6°), the coolest 13 November (33.9°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 November – 18 November | 60.9° | 53.2° | +4.3° |
| 19 November – 28 November | 54.3° | 49.2° | +2.8° |
| 29 November – 8 December | at normal | 44.3° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Jerseyville (12 mi).
0Summerville, Tuesday, 10 November
Clear. High 69°, low 44°.
0.03
Summerville, Wednesday, 11 November
Light rain. High 64°, low 43°.
0.01Summerville, Thursday, 12 November
Light rain. High 49°, low 43°.
0
Summerville, Friday, 13 November
Overcast. High 43°, low 34°.
0Summerville, Saturday, 14 November
Clear. High 46°, low 35°.
0
Summerville, Sunday, 15 November
Partly cloudy. High 59°, low 35°.
0Summerville, Monday, 16 November
Overcast. High 68°, low 52°.
0Summerville, Tuesday, 17 November
Overcast. High 72°, low 58°.
0Summerville, Wednesday, 18 November
Clear. High 70°, low 53°.
0Summerville, Thursday, 19 November
Overcast. High 70°, low 51°.
0.3Summerville, Friday, 20 November
Rain. High 63°, low 51°.
0.22Summerville, Saturday, 21 November
Rain. High 49°, low 44°.
1.02Summerville, Sunday, 22 November
Heavy rain. High 52°, low 45°.
0.02
Summerville, Monday, 23 November
Snow. High 44°, low 36°.
0Summerville, Tuesday, 24 November
Partly cloudy. High 47°, low 36°.
0.13
Summerville, Wednesday, 25 November
Climate normal for this date — 60-year average.
0.15Summerville, Thursday, 26 November
Climate normal for this date — 60-year average.
0.21Summerville, Friday, 27 November
Climate normal for this date — 60-year average.
0.09Summerville, Saturday, 28 November
Climate normal for this date — 60-year average.
0.07Summerville, Sunday, 29 November
Climate normal for this date — 60-year average.
0.17Summerville, Monday, 30 November
Climate normal for this date — 60-year average.
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.
0.06Summerville, 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.
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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