Weather in Grafton, IL
Grafton, Saturday, 7 November, 06:18
Fog. Feels like 32°. High 53°, low 34°.
Monthly outlook for Grafton, IL: average high 58.8°, average low 42.5°. That is 3.2° above the climate normal for November. Precipitation is expected on 1 day (about 1.0 inches), against a normal of 4 days and 1.6 inches. The warmest day looks like 15 November (66.2°), the coolest 14 November (27.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 7 November – 16 November | 58.9° | 53.8° | +2.8° |
| 17 November – 26 November | 58.6° | 50.6° | +4.4° |
| 27 November – 6 December | at normal | 45.2° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Jerseyville (11 mi).
0
Grafton, Sunday, 8 November
Clear. High 65°, low 39°.
0Grafton, Monday, 9 November
Clear. High 64°, low 43°.
0Grafton, Tuesday, 10 November
Clear. High 66°, low 47°.
0.02
Grafton, Wednesday, 11 November
Light rain. High 65°, low 48°.
0
Grafton, Thursday, 12 November
Overcast. High 51°, low 40°.
0.02
Grafton, Friday, 13 November
Light snow. High 44°, low 33°.
0Grafton, Saturday, 14 November
Clear. High 51°, low 28°.
0Grafton, Sunday, 15 November
Clear. High 66°, low 39°.
0Grafton, Monday, 16 November
Overcast. High 66°, low 49°.
0.03Grafton, Tuesday, 17 November
Light rain. High 60°, low 51°.
0.94Grafton, Wednesday, 18 November
Rain. High 57°, low 55°.
0.01Grafton, Thursday, 19 November
Light rain. High 60°, low 44°.
0Grafton, Friday, 20 November
Overcast. High 61°, low 47°.
0Grafton, Saturday, 21 November
Light rain. High 55°, low 45°.
0Grafton, Sunday, 22 November
Clear. High 57°, low 39°.
0.09
Grafton, Monday, 23 November
Climate normal for this date — 60-year average.
0.13Grafton, Tuesday, 24 November
Climate normal for this date — 60-year average.
0.13
Grafton, Wednesday, 25 November
Climate normal for this date — 60-year average.
0.15Grafton, Thursday, 26 November
Climate normal for this date — 60-year average.
0.21Grafton, 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.
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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