Weather in Mendham, NJ
Mendham, Wednesday, 7 October, 19:59
Clear. Feels like 55°. High 66°, low 38°.
Monthly outlook for Mendham, NJ: average high 61.9°, average low 43.4°. That is 0.7° below the climate normal for October. Precipitation is expected on 2 days (about 0.7 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 13 October (73.5°), the coolest 20 October (31.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 7 October – 16 October | 66.1° | 64.5° | +0.9° |
| 17 October – 26 October | 54.8° | 60.6° | -3.2° |
| 27 October – 5 November | at normal | 57.5° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Morristown (6 mi).
0
Mendham, Thursday, 8 October
Clear. High 73°, low 47°.
0
Mendham, Friday, 9 October
Partly cloudy. High 68°, low 43°.
0Mendham, Saturday, 10 October
Partly cloudy. High 68°, low 46°.
0
Mendham, Sunday, 11 October
Overcast. High 65°, low 51°.
0.54
Mendham, Monday, 12 October
Rain. High 69°, low 59°.
0.09Mendham, Tuesday, 13 October
Light rain. High 73°, low 52°.
0Mendham, Wednesday, 14 October
Overcast. High 51°, low 43°.
0Mendham, Thursday, 15 October
Clear. High 63°, low 42°.
0Mendham, Friday, 16 October
Partly cloudy. High 63°, low 48°.
0
Mendham, Saturday, 17 October
Mostly clear. High 61°, low 43°.
0Mendham, Sunday, 18 October
Mostly clear. High 48°, low 36°.
0Mendham, Monday, 19 October
Clear. High 49°, low 33°.
0Mendham, Tuesday, 20 October
Clear. High 52°, low 32°.
0Mendham, Wednesday, 21 October
Mostly clear. High 60°, low 35°.
0.02Mendham, Thursday, 22 October
Light rain. High 59°, low 45°.
0.09Mendham, Friday, 23 October
Climate normal for this date — 60-year average.
0.13Mendham, Saturday, 24 October
Climate normal for this date — 60-year average.
0.11
Mendham, Sunday, 25 October
Climate normal for this date — 60-year average.
0.18Mendham, Monday, 26 October
Climate normal for this date — 60-year average.
0.18Mendham, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.16Mendham, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.23Mendham, Thursday, 29 October
Climate normal for this date — 60-year average.
0.11Mendham, Friday, 30 October
Climate normal for this date — 60-year average.
0.06Mendham, Saturday, 31 October
Climate normal for this date — 60-year average.
0.09Mendham, Sunday, 1 November
Climate normal for this date — 60-year average.
0.11Mendham, Monday, 2 November
Climate normal for this date — 60-year average.
0.09Mendham, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.06Mendham, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.14Mendham, Thursday, 5 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 Mendham, 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 Mendham, 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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