Weather in Grafton, IL
Grafton, Wednesday, 11 November, 21:33
Clear. Feels like 51°. High 68°, low 45°.
Monthly outlook for Grafton, IL: average high 53.2°, average low 37.2°. That is 1.1° above the climate normal for November. Precipitation is expected on 2 days (about 1.6 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 22 November (68.7°), the coolest 26 November (26.3°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 11 November – 20 November | 55.5° | 52.4° | +1.7° |
| 21 November – 30 November | 49.3° | 48.1° | +0.7° |
| 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 (11 mi).
0
Grafton, Thursday, 12 November
Overcast. High 52°, low 36°.
0Grafton, Friday, 13 November
Overcast. High 47°, low 32°.
0
Grafton, Saturday, 14 November
Clear. High 46°, low 30°.
0Grafton, Sunday, 15 November
Overcast. High 49°, low 32°.
0Grafton, Monday, 16 November
Clear. High 53°, low 34°.
0Grafton, Tuesday, 17 November
Clear. High 55°, low 36°.
0Grafton, Wednesday, 18 November
Clear. High 59°, low 38°.
0Grafton, Thursday, 19 November
Overcast. High 61°, low 41°.
0Grafton, Friday, 20 November
Overcast. High 65°, low 47°.
0
Grafton, Saturday, 21 November
Partly cloudy. High 59°, low 45°.
0.02
Grafton, Sunday, 22 November
Light rain. High 69°, low 51°.
0.07Grafton, Monday, 23 November
Light rain. High 50°, low 43°.
1.49
Grafton, Tuesday, 24 November
Snow. High 43°, low 33°.
0.01Grafton, Wednesday, 25 November
Light snow. High 38°, low 27°.
0Grafton, Thursday, 26 November
Overcast. High 37°, low 26°.
0.21
Grafton, Friday, 27 November
Climate normal for this date — 60-year average.
0.09Grafton, Saturday, 28 November
Climate normal for this date — 60-year average.
0.07Grafton, Sunday, 29 November
Climate normal for this date — 60-year average.
0.17Grafton, Monday, 30 November
Climate normal for this date — 60-year average.
0.11Grafton, Tuesday, 1 December
Climate normal for this date — 60-year average.
0.08Grafton, Wednesday, 2 December
Climate normal for this date — 60-year average.
0.11Grafton, Thursday, 3 December
Climate normal for this date — 60-year average.
0.08Grafton, Friday, 4 December
Climate normal for this date — 60-year average.
0.08Grafton, Saturday, 5 December
Climate normal for this date — 60-year average.
0.06Grafton, Sunday, 6 December
Climate normal for this date — 60-year average.
0.1Grafton, Monday, 7 December
Climate normal for this date — 60-year average.
0.07Grafton, Tuesday, 8 December
Climate normal for this date — 60-year average.
0.07Grafton, Wednesday, 9 December
Climate normal for this date — 60-year average.
0.11Grafton, 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 Grafton, 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 Grafton, 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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