Weather in Jamestown, IL
Jamestown, Wednesday, 21 October, 10:14
Clear. Feels like 63°. High 74°, low 45°.
0Jamestown, Thursday, 22 October
Clear. High 76°, low 49°.
0Jamestown, Friday, 23 October
Clear. High 71°, low 51°.
0
Jamestown, Saturday, 24 October
Overcast. High 70°, low 50°.
0Jamestown, Sunday, 25 October
Overcast. High 74°, low 50°.
0Jamestown, Monday, 26 October
Overcast. High 72°, low 52°.
0Jamestown, Tuesday, 27 October
Overcast. High 74°, low 55°.
0
Jamestown, Wednesday, 28 October
Mostly clear. High 77°, low 61°.
0.27
Jamestown, Thursday, 29 October
Rain. High 68°, low 57°.
0.09Jamestown, Friday, 30 October
Light rain. High 64°, low 53°.
0Jamestown, Saturday, 31 October
Overcast. High 76°, low 56°.
0.72Jamestown, Sunday, 1 November
Rain. High 67°, low 60°.
0.31Jamestown, Monday, 2 November
Light rain. High 63°, low 56°.
0.46Jamestown, Tuesday, 3 November
Rain. High 55°, low 53°.
1.16Jamestown, Wednesday, 4 November
Heavy rain. High 56°, low 47°.
0.04Jamestown, Thursday, 5 November
Light rain. High 50°, low 47°.
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 Jamestown, 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 Jamestown, 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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