Rock Valley, Friday, 9 October, 14:16
Clear. Feels like 75°. High 76°, low 52°.
Rock Valley, Saturday, 10 October
Clear. High 83°, low 64°.
Rock Valley, Sunday, 11 October
Partly cloudy. High 80°, low 64°.
Rock Valley, Monday, 12 October
Clear. High 75°, low 56°.
Rock Valley, Tuesday, 13 October
Overcast. High 62°, low 55°.
Rock Valley, Wednesday, 14 October
Heavy rain. High 62°, low 52°.
Rock Valley, Thursday, 15 October
Heavy rain. High 60°, low 53°.
Rock Valley, Friday, 16 October
Overcast. High 48°, low 39°.
Rock Valley, Saturday, 17 October
Clear. High 46°, low 30°.
Rock Valley, Sunday, 18 October
Partly cloudy. High 60°, low 39°.
Rock Valley, Monday, 19 October
Partly cloudy. High 64°, low 43°.
Rock Valley, Tuesday, 20 October
Overcast. High 67°, low 48°.
Rock Valley, Wednesday, 21 October
Overcast. High 65°, low 53°.
Rock Valley, Thursday, 22 October
Overcast. High 60°, low 48°.
Rock Valley, Friday, 23 October
Mostly clear. High 47°, low 37°.
Rock Valley, Saturday, 24 October
Mostly clear. High 49°, low 29°.
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 Rock Valley, IA 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 Rock Valley, IA 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.