Weather in Williamstown, NJ
Williamstown, Monday, 12 October, 11:12
Clear. Feels like 62°. High 72°, low 56°.
Monthly outlook for Williamstown, NJ: average high 66.9°, average low 51.7°. That is 1.5° above the climate normal for October. Precipitation is expected on 2 days (about 0.7 inches), against a normal of 4 days and 1.7 inches. The warmest day looks like 14 October (79.6°), the coolest 18 October (39.8°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 12 October – 21 October | 67.8° | 65.3° | +1.4° |
| 22 October – 31 October | 65.5° | 61.7° | +2.1° |
| 1 November – 10 November | at normal | 58.9° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Mount Ephraim (15 mi).
0Williamstown, Tuesday, 13 October
Clear. High 76°, low 54°.
0
Williamstown, Wednesday, 14 October
Partly cloudy. High 80°, low 65°.
0.07
Williamstown, Thursday, 15 October
Light rain. High 67°, low 56°.
0.52Williamstown, Friday, 16 October
Rain. High 75°, low 57°.
0
Williamstown, Saturday, 17 October
Mostly clear. High 54°, low 45°.
0Williamstown, Sunday, 18 October
Clear. High 55°, low 40°.
0Williamstown, Monday, 19 October
Clear. High 64°, low 43°.
0
Williamstown, Tuesday, 20 October
Overcast. High 67°, low 52°.
0Williamstown, Wednesday, 21 October
Mostly clear. High 69°, low 56°.
0Williamstown, Thursday, 22 October
Clear. High 63°, low 49°.
0Williamstown, Friday, 23 October
Overcast. High 63°, low 47°.
0Williamstown, Saturday, 24 October
Overcast. High 69°, low 57°.
0Williamstown, Sunday, 25 October
Overcast. High 72°, low 58°.
0.03Williamstown, Monday, 26 October
Light rain. High 64°, low 50°.
0Williamstown, Tuesday, 27 October
Overcast. High 62°, low 44°.
0.13Williamstown, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.22Williamstown, Thursday, 29 October
Climate normal for this date — 60-year average.
0.09Williamstown, Friday, 30 October
Climate normal for this date — 60-year average.
0.05Williamstown, Saturday, 31 October
Climate normal for this date — 60-year average.
0.08Williamstown, Sunday, 1 November
Climate normal for this date — 60-year average.
0.08Williamstown, Monday, 2 November
Climate normal for this date — 60-year average.
0.08Williamstown, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.08Williamstown, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.12Williamstown, Thursday, 5 November
Climate normal for this date — 60-year average.
0.07Williamstown, Friday, 6 November
Climate normal for this date — 60-year average.
0.09Williamstown, Saturday, 7 November
Climate normal for this date — 60-year average.
0.11Williamstown, Sunday, 8 November
Climate normal for this date — 60-year average.
0.08Williamstown, Monday, 9 November
Climate normal for this date — 60-year average.
0.15
Williamstown, Tuesday, 10 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, NJ 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, NJ 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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