Weather in Lancaster, IL
Lancaster, Saturday, 17 October, 08:39
Clear. Feels like 36°. High 55°, low 38°.
Monthly outlook for Lancaster, IL: average high 68.1°, average low 49.4°. That is 4.9° above the climate normal for October. Precipitation is expected on 4 days (about 1.5 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 27 October (78.8°), the coolest 17 October (37.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 17 October – 26 October | 67.3° | 60.2° | +4° |
| 27 October – 5 November | 69.3° | 56.3° | +7.2° |
| 6 November – 15 November | at normal | 51° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Trivoli (9 mi).
0Lancaster, Sunday, 18 October
Clear. High 62°, low 40°.
0Lancaster, Monday, 19 October
Clear. High 65°, low 43°.
0Lancaster, Tuesday, 20 October
Clear. High 66°, low 43°.
0Lancaster, Wednesday, 21 October
Clear. High 68°, low 46°.
0Lancaster, Thursday, 22 October
Clear. High 70°, low 48°.
0Lancaster, Friday, 23 October
Clear. High 75°, low 53°.
0
Lancaster, Saturday, 24 October
Overcast. High 74°, low 58°.
0Lancaster, Sunday, 25 October
Overcast. High 69°, low 55°.
0Lancaster, Monday, 26 October
Clear. High 69°, low 48°.
0Lancaster, Tuesday, 27 October
Overcast. High 79°, low 61°.
0.32
Lancaster, Wednesday, 28 October
Rain. High 68°, low 59°.
0.05Lancaster, Thursday, 29 October
Light rain. High 62°, low 49°.
0.94Lancaster, Friday, 30 October
Heavy rain. High 74°, low 55°.
0.15Lancaster, Saturday, 31 October
Light rain. High 72°, low 50°.
0Lancaster, Sunday, 1 November
Overcast. High 61°, low 44°.
0.08
Lancaster, Monday, 2 November
Climate normal for this date — 60-year average.
0.08Lancaster, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.09Lancaster, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.13Lancaster, Thursday, 5 November
Climate normal for this date — 60-year average.
0.09Lancaster, Friday, 6 November
Climate normal for this date — 60-year average.
0.03
Lancaster, Saturday, 7 November
Climate normal for this date — 60-year average.
0.05Lancaster, Sunday, 8 November
Climate normal for this date — 60-year average.
0.14
Lancaster, Monday, 9 November
Climate normal for this date — 60-year average.
0.15Lancaster, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.07Lancaster, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.07Lancaster, Thursday, 12 November
Climate normal for this date — 60-year average.
0.06Lancaster, Friday, 13 November
Climate normal for this date — 60-year average.
0.07Lancaster, Saturday, 14 November
Climate normal for this date — 60-year average.
0.06Lancaster, Sunday, 15 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 Lancaster, 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 Lancaster, 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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