Weather in Grafton, IL
Grafton, Sunday, 25 October, 01:53
Overcast. Feels like 55°. High 77°, low 50°.
Monthly outlook for Grafton, IL: average high 71.8°, average low 55.9°. That is 7.3° above the climate normal for October. Precipitation is expected on 3 days (about 1.5 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 7 November (81°), the coolest 9 November (44.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 25 October – 3 November | 75.3° | 60.1° | +8.4° |
| 4 November – 13 November | 66° | 54.9° | +6.2° |
| 14 November – 23 November | at normal | 51.8° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Jerseyville (11 mi).
0Grafton, Monday, 26 October
Overcast. High 75°, low 52°.
0Grafton, Tuesday, 27 October
Overcast. High 71°, low 54°.
0
Grafton, Wednesday, 28 October
Clear. High 76°, low 55°.
0Grafton, Thursday, 29 October
Clear. High 78°, low 58°.
0Grafton, Friday, 30 October
Overcast. High 77°, low 59°.
0.03
Grafton, Saturday, 31 October
Light rain. High 79°, low 67°.
0.05Grafton, Sunday, 1 November
Light rain. High 80°, low 69°.
0Grafton, Monday, 2 November
Overcast. High 76°, low 62°.
0.85Grafton, Tuesday, 3 November
Rain. High 63°, low 52°.
0.56Grafton, Wednesday, 4 November
Heavy rain. High 60°, low 54°.
0Grafton, Thursday, 5 November
Overcast. High 64°, low 49°.
0
Grafton, Friday, 6 November
Partly cloudy. High 72°, low 50°.
0Grafton, Saturday, 7 November
Overcast. High 81°, low 66°.
0Grafton, Sunday, 8 November
Partly cloudy. High 64°, low 52°.
0Grafton, Monday, 9 November
Clear. High 56°, low 44°.
0.14Grafton, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.1Grafton, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.08Grafton, Thursday, 12 November
Climate normal for this date — 60-year average.
0.06
Grafton, Friday, 13 November
Climate normal for this date — 60-year average.
0.08Grafton, Saturday, 14 November
Climate normal for this date — 60-year average.
0.12Grafton, Sunday, 15 November
Climate normal for this date — 60-year average.
0.1Grafton, Monday, 16 November
Climate normal for this date — 60-year average.
0.13Grafton, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.16
Grafton, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.09Grafton, Thursday, 19 November
Climate normal for this date — 60-year average.
0.11Grafton, Friday, 20 November
Climate normal for this date — 60-year average.
0.1Grafton, Saturday, 21 November
Climate normal for this date — 60-year average.
0.08Grafton, Sunday, 22 November
Climate normal for this date — 60-year average.
0.09Grafton, Monday, 23 November
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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