Delta, Thursday, 8 October, 14:17
Clear. Feels like 81°. High 83°, low 54°.
Delta, Friday, 9 October
Clear. High 86°, low 51°.
Delta, Saturday, 10 October
Heavy rain. High 72°, low 57°.
Delta, Sunday, 11 October
Rain. High 73°, low 60°.
Delta, Monday, 12 October
Clear. High 84°, low 59°.
Delta, Tuesday, 13 October
Clear. High 86°, low 66°.
Delta, Wednesday, 14 October
Clear. High 91°, low 66°.
Delta, Thursday, 15 October
Clear. High 92°, low 74°.
Delta, Friday, 16 October
Overcast. High 85°, low 59°.
Delta, Saturday, 17 October
Partly cloudy. High 67°, low 55°.
Delta, Sunday, 18 October
Clear. High 70°, low 43°.
Delta, Monday, 19 October
Light rain. High 73°, low 58°.
Delta, Tuesday, 20 October
Rain. High 64°, low 59°.
Delta, Wednesday, 21 October
Overcast. High 75°, low 60°.
Delta, Thursday, 22 October
Light rain. High 76°, low 57°.
Delta, Friday, 23 October
Clear. High 67°, low 44°.
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 Delta, IL are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
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.
They are real temperature extremes recorded in Delta, IL since 1960: the highest and lowest reading for each calendar date, with the year it happened.
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.