Weather in Williamstown, IA
Williamstown, Tuesday, 20 October, 21:10
Clear. Feels like 51°. High 69°, low 39°.
Monthly outlook for Williamstown, IA: average high 58.8°, average low 41.9°. That is 2.5° above the climate normal for October. Precipitation is expected on 2 days (about 0.4 inches), against a normal of 4 days and 1.4 inches. The warmest day looks like 22 October (74.2°), the coolest 27 October (29.8°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 20 October – 29 October | 61.7° | 55.9° | +3.2° |
| 30 October – 8 November | 53.9° | 50.8° | +1.7° |
| 9 November – 18 November | at normal | 45.2° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Frederika (6 mi).
0
Williamstown, Wednesday, 21 October
Clear. High 71°, low 44°.
0Williamstown, Thursday, 22 October
Clear. High 74°, low 45°.
0
Williamstown, Friday, 23 October
Partly cloudy. High 70°, low 53°.
0
Williamstown, Saturday, 24 October
Overcast. High 69°, low 55°.
0Williamstown, Sunday, 25 October
Partly cloudy. High 69°, low 55°.
0.31
Williamstown, Monday, 26 October
Rain. High 55°, low 39°.
0Williamstown, Tuesday, 27 October
Clear. High 42°, low 30°.
0Williamstown, Wednesday, 28 October
Clear. High 46°, low 30°.
0Williamstown, Thursday, 29 October
Clear. High 51°, low 33°.
0Williamstown, Friday, 30 October
Clear. High 52°, low 35°.
0Williamstown, Saturday, 31 October
Overcast. High 59°, low 43°.
0.04Williamstown, Sunday, 1 November
Light rain. High 59°, low 51°.
0Williamstown, Monday, 2 November
Partly cloudy. High 53°, low 42°.
0Williamstown, Tuesday, 3 November
Overcast. High 47°, low 36°.
0
Williamstown, Wednesday, 4 November
Mostly clear. High 53°, low 40°.
0.06Williamstown, Thursday, 5 November
Climate normal for this date — 60-year average.
0.06Williamstown, Friday, 6 November
Climate normal for this date — 60-year average.
0.02Williamstown, Saturday, 7 November
Climate normal for this date — 60-year average.
0.03Williamstown, Sunday, 8 November
Climate normal for this date — 60-year average.
0.11Williamstown, Monday, 9 November
Climate normal for this date — 60-year average.
0.1Williamstown, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.09Williamstown, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.06Williamstown, Thursday, 12 November
Climate normal for this date — 60-year average.
0.06Williamstown, Friday, 13 November
Climate normal for this date — 60-year average.
0.02Williamstown, Saturday, 14 November
Climate normal for this date — 60-year average.
0.07Williamstown, Sunday, 15 November
Climate normal for this date — 60-year average.
0.06Williamstown, Monday, 16 November
Climate normal for this date — 60-year average.
0.09Williamstown, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.08Williamstown, Wednesday, 18 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 Williamstown, IA 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 Williamstown, IA 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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