Weather in Summerville, IL
Summerville, Wednesday, 11 November, 15:13
Partly cloudy. Feels like 65°. High 67°, low 44°.
Monthly outlook for Summerville, IL: average high 52°, average low 35°. That is 0.4° above the climate normal for November. Precipitation is expected on 3 days (about 1.4 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 11 November (67.2°), the coolest 25 November (23.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 11 November – 20 November | 54.2° | 52.4° | +1° |
| 21 November – 30 November | 48.3° | 48.1° | +0.1° |
| 1 December – 10 December | at normal | 43.5° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Jerseyville (12 mi).
0
Summerville, Thursday, 12 November
Overcast. High 53°, low 35°.
0Summerville, Friday, 13 November
Overcast. High 42°, low 33°.
0
Summerville, Saturday, 14 November
Clear. High 45°, low 29°.
0Summerville, Sunday, 15 November
Overcast. High 48°, low 28°.
0Summerville, Monday, 16 November
Clear. High 52°, low 29°.
0Summerville, Tuesday, 17 November
Clear. High 53°, low 34°.
0Summerville, Wednesday, 18 November
Clear. High 56°, low 35°.
0Summerville, Thursday, 19 November
Overcast. High 58°, low 38°.
0.28
Summerville, Friday, 20 November
Rain. High 66°, low 45°.
0.45Summerville, Saturday, 21 November
Rain. High 65°, low 57°.
0.64Summerville, Sunday, 22 November
Rain. High 56°, low 40°.
0.01
Summerville, Monday, 23 November
Light snow. High 42°, low 32°.
0Summerville, Tuesday, 24 November
Clear. High 36°, low 25°.
0Summerville, Wednesday, 25 November
Clear. High 41°, low 23°.
0Summerville, Thursday, 26 November
Clear. High 50°, low 31°.
0.21
Summerville, 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.
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.
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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