Weather in Cortland, IL
Cortland, Tuesday, 27 October, 12:03
Clear. Feels like 59°. High 64°, low 50°.
Monthly outlook for Cortland, IL: average high 56.9°, average low 46.7°. That is 2.4° above the climate normal for October. Precipitation is expected on 5 days (about 1.8 inches), against a normal of 4 days and 1.4 inches. The warmest day looks like 28 October (71.7°), the coolest 11 November (27.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 27 October – 5 November | 61.6° | 54.2° | +4.1° |
| 6 November – 15 November | 49.1° | 48.5° | +0.4° |
| 16 November – 25 November | at normal | 44.8° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Sycamore (5 mi).
0
Cortland, Wednesday, 28 October
Partly cloudy. High 72°, low 55°.
0.03
Cortland, Thursday, 29 October
Light rain. High 65°, low 48°.
0.16Cortland, Friday, 30 October
Rain. High 63°, low 43°.
0.6Cortland, Saturday, 31 October
Rain. High 65°, low 53°.
0
Cortland, Sunday, 1 November
Overcast. High 67°, low 52°.
0Cortland, Monday, 2 November
Overcast. High 59°, low 55°.
0Cortland, Tuesday, 3 November
Overcast. High 56°, low 53°.
0.35Cortland, Wednesday, 4 November
Rain. High 53°, low 50°.
0.4Cortland, Thursday, 5 November
Light rain. High 53°, low 51°.
0Cortland, Friday, 6 November
Overcast. High 50°, low 46°.
0Cortland, Saturday, 7 November
Overcast. High 53°, low 40°.
0Cortland, Sunday, 8 November
Overcast. High 55°, low 41°.
0.22Cortland, Monday, 9 November
Rain. High 51°, low 46°.
0Cortland, Tuesday, 10 November
Overcast. High 45°, low 36°.
0Cortland, Wednesday, 11 November
Overcast. High 40°, low 28°.
0.06Cortland, Thursday, 12 November
Climate normal for this date — 60-year average.
0.04Cortland, Friday, 13 November
Climate normal for this date — 60-year average.
0.07Cortland, Saturday, 14 November
Climate normal for this date — 60-year average.
0.08Cortland, Sunday, 15 November
Climate normal for this date — 60-year average.
0.05
Cortland, Monday, 16 November
Climate normal for this date — 60-year average.
0.1Cortland, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.1Cortland, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.07Cortland, Thursday, 19 November
Climate normal for this date — 60-year average.
0.08
Cortland, Friday, 20 November
Climate normal for this date — 60-year average.
0.1Cortland, Saturday, 21 November
Climate normal for this date — 60-year average.
0.03Cortland, Sunday, 22 November
Climate normal for this date — 60-year average.
0.07Cortland, Monday, 23 November
Climate normal for this date — 60-year average.
0.08Cortland, Tuesday, 24 November
Climate normal for this date — 60-year average.
0.08Cortland, Wednesday, 25 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 Cortland, 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 Cortland, 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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