Weather in Williamsville, IL
Williamsville, Thursday, 12 November, 19:28
Overcast. Feels like 34°. High 46°, low 39°.
Monthly outlook for Williamsville, IL: average high 52.4°, average low 38.9°. That is 1.7° above the climate normal for November. Precipitation is expected on 5 days (about 1.4 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 21 November (66.6°), the coolest 27 November (22.8°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 12 November – 21 November | 54.5° | 50.6° | +2.2° |
| 22 November – 1 December | 48.9° | 46° | +1.6° |
| 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).
0Williamsville, Friday, 13 November
Overcast. High 44°, low 34°.
0
Williamsville, Saturday, 14 November
Clear. High 46°, low 29°.
0
Williamsville, Sunday, 15 November
Mostly clear. High 49°, low 28°.
0Williamsville, Monday, 16 November
Clear. High 52°, low 29°.
0Williamsville, Tuesday, 17 November
Clear. High 54°, low 33°.
0Williamsville, Wednesday, 18 November
Overcast. High 62°, low 38°.
0.08
Williamsville, Thursday, 19 November
Light rain. High 63°, low 52°.
0.04Williamsville, Friday, 20 November
Light rain. High 63°, low 55°.
0Williamsville, Saturday, 21 November
Overcast. High 67°, low 49°.
0Williamsville, Sunday, 22 November
Overcast. High 65°, low 51°.
0.7Williamsville, Monday, 23 November
Rain. High 63°, low 59°.
0.2Williamsville, Tuesday, 24 November
Rain. High 58°, low 43°.
0.01
Williamsville, Wednesday, 25 November
Light snow. High 43°, low 34°.
0.35Williamsville, Thursday, 26 November
Snow. High 33°, low 27°.
0Williamsville, Friday, 27 November
Clear. High 32°, low 23°.
0.12
Williamsville, 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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