Weather in New Grand Chain, IL
New Grand Chain, Sunday, 9 August, 14:01
Clear. Feels like 97°. High 88°, low 71°.
0New Grand Chain, Monday, 10 August
Clear. High 95°, low 73°.
0New Grand Chain, Tuesday, 11 August
Clear. High 97°, low 75°.
0.42
New Grand Chain, Wednesday, 12 August
Rain. High 95°, low 72°.
0.04New Grand Chain, Thursday, 13 August
Light rain. High 89°, low 69°.
0
New Grand Chain, Friday, 14 August
Partly cloudy. High 97°, low 75°.
0
New Grand Chain, Saturday, 15 August
Mostly clear. High 98°, low 75°.
0.05New Grand Chain, Sunday, 16 August
Light rain. High 99°, low 74°.
0
New Grand Chain, Monday, 17 August
Overcast. High 98°, low 75°.
0New Grand Chain, Tuesday, 18 August
Clear. High 103°, low 76°.
0New Grand Chain, Wednesday, 19 August
Clear. High 102°, low 78°.
0.06New Grand Chain, Thursday, 20 August
Light rain. High 104°, low 74°.
0New Grand Chain, Friday, 21 August
Light rain. High 100°, low 72°.
0.01New Grand Chain, Saturday, 22 August
Light rain. High 93°, low 71°.
0New Grand Chain, Sunday, 23 August
Clear. High 95°, low 68°.
0New Grand Chain, Monday, 24 August
Mostly clear. High 98°, low 72°.
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 New Grand Chain, 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 New Grand Chain, 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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