Weather in Williamsville, IL
Williamsville, Thursday, 12 November, 08:49
Overcast. Feels like 38°. High 48°, low 38°.
Monthly outlook for Williamsville, IL: average high 54.9°, average low 39.7°. That is 3.1° above the climate normal for November. Precipitation is expected on 4 days (about 4.7 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 19 November (69°), the coolest 15 November (28.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 12 November – 21 November | 56° | 50.6° | +3° |
| 22 November – 1 December | 53.1° | 46° | +3.9° |
| 2 December – 11 December | at normal | 41° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Broadwell (10 mi).
0
Williamsville, Friday, 13 November
Partly cloudy. High 45°, low 36°.
0
Williamsville, Saturday, 14 November
Clear. High 46°, low 29°.
0
Williamsville, Sunday, 15 November
Mostly clear. High 48°, low 28°.
0Williamsville, Monday, 16 November
Clear. High 52°, low 30°.
0Williamsville, Tuesday, 17 November
Clear. High 54°, low 32°.
0Williamsville, Wednesday, 18 November
Partly cloudy. High 62°, low 38°.
0.02
Williamsville, Thursday, 19 November
Light rain. High 69°, low 49°.
0Williamsville, Friday, 20 November
Overcast. High 69°, low 51°.
0Williamsville, Saturday, 21 November
Light rain. High 68°, low 58°.
0.21Williamsville, Sunday, 22 November
Light rain. High 64°, low 58°.
2.89Williamsville, Monday, 23 November
Heavy rain. High 58°, low 51°.
0.52Williamsville, Tuesday, 24 November
Rain. High 58°, low 38°.
0Williamsville, Wednesday, 25 November
Clear. High 39°, low 31°.
0Williamsville, Thursday, 26 November
Overcast. High 40°, low 29°.
1.01Williamsville, Friday, 27 November
Rain. High 60°, low 41°.
0.12Williamsville, Saturday, 28 November
Climate normal for this date — 60-year average.
0.07Williamsville, Sunday, 29 November
Climate normal for this date — 60-year average.
0.13Williamsville, Monday, 30 November
Climate normal for this date — 60-year average.
0.13
Williamsville, Tuesday, 1 December
Climate normal for this date — 60-year average.
0.07Williamsville, Wednesday, 2 December
Climate normal for this date — 60-year average.
0.09Williamsville, Thursday, 3 December
Climate normal for this date — 60-year average.
0.07Williamsville, Friday, 4 December
Climate normal for this date — 60-year average.
0.07Williamsville, Saturday, 5 December
Climate normal for this date — 60-year average.
0.06Williamsville, Sunday, 6 December
Climate normal for this date — 60-year average.
0.09Williamsville, Monday, 7 December
Climate normal for this date — 60-year average.
0.06Williamsville, Tuesday, 8 December
Climate normal for this date — 60-year average.
0.07Williamsville, Wednesday, 9 December
Climate normal for this date — 60-year average.
0.1Williamsville, Thursday, 10 December
Climate normal for this date — 60-year average.
0.1Williamsville, Friday, 11 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 Williamsville, 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 Williamsville, 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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