Weather in Williamsville, IL
Williamsville, Friday, 13 November, 19:09
Overcast. Feels like 34°. High 43°, low 36°.
Monthly outlook for Williamsville, IL: average high 47.7°, average low 31.3°. That is 0.7° below the climate normal for November. Precipitation is expected on 1 day (about 0.1 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 20 November (66.4°), the coolest 24 November (16.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 13 November – 22 November | 53.1° | 50.4° | +1.5° |
| 23 November – 2 December | 38.6° | 45.6° | -3.8° |
| 3 December – 12 December | at normal | 40.6° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Broadwell (10 mi).
0
Williamsville, Saturday, 14 November
Clear. High 46°, low 30°.
0
Williamsville, Sunday, 15 November
Mostly clear. High 49°, low 29°.
0Williamsville, Monday, 16 November
Clear. High 53°, low 29°.
0Williamsville, Tuesday, 17 November
Clear. High 54°, low 34°.
0Williamsville, Wednesday, 18 November
Overcast. High 58°, low 37°.
0.04
Williamsville, Thursday, 19 November
Light rain. High 58°, low 50°.
0Williamsville, Friday, 20 November
Overcast. High 66°, low 53°.
0.03Williamsville, Saturday, 21 November
Light rain. High 62°, low 41°.
0Williamsville, Sunday, 22 November
Mostly clear. High 40°, low 28°.
0Williamsville, Monday, 23 November
Overcast. High 27°, low 20°.
0Williamsville, Tuesday, 24 November
Clear. High 31°, low 16°.
0Williamsville, Wednesday, 25 November
Clear. High 36°, low 18°.
0Williamsville, Thursday, 26 November
Overcast. High 44°, low 22°.
0
Williamsville, Friday, 27 November
Partly cloudy. High 49°, low 28°.
0Williamsville, Saturday, 28 November
Overcast. High 47°, low 30°.
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.
0.07Williamsville, 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 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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