Weather in Portsmouth, NH
Portsmouth, Thursday, 5 November, 12:36
Overcast. Feels like 73°. High 72°, low 57°.
Monthly outlook for Portsmouth, NH: average high 54.3°, average low 41.4°. That is 3.3° above the climate normal for November. Precipitation is expected on 6 days (about 0.9 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 5 November (72.4°), the coolest 15 November (31°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 5 November – 14 November | 54.8° | 49.6° | +2.9° |
| 15 November – 24 November | 53.5° | 45.4° | +4.5° |
| 25 November – 4 December | at normal | 43.3° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — New Castle (3 mi).
0.16
Portsmouth, Friday, 6 November
Rain. High 71°, low 60°.
0.15Portsmouth, Saturday, 7 November
Rain. High 60°, low 46°.
0.14Portsmouth, Sunday, 8 November
Light rain. High 56°, low 45°.
0
Portsmouth, Monday, 9 November
Partly cloudy. High 55°, low 44°.
0Portsmouth, Tuesday, 10 November
Overcast. High 53°, low 39°.
0Portsmouth, Wednesday, 11 November
Overcast. High 55°, low 43°.
0
Portsmouth, Thursday, 12 November
Clear. High 44°, low 32°.
0.19
Portsmouth, Friday, 13 November
Snow. High 40°, low 31°.
0.15Portsmouth, Saturday, 14 November
Snow. High 42°, low 32°.
0
Portsmouth, Sunday, 15 November
Mostly clear. High 48°, low 31°.
0Portsmouth, Monday, 16 November
Clear. High 57°, low 37°.
0Portsmouth, Tuesday, 17 November
Overcast. High 54°, low 39°.
0Portsmouth, Wednesday, 18 November
Partly cloudy. High 52°, low 40°.
0Portsmouth, Thursday, 19 November
Overcast. High 50°, low 43°.
0Portsmouth, Friday, 20 November
Overcast. High 61°, low 45°.
0.13
Portsmouth, Saturday, 21 November
Climate normal for this date — 60-year average.
0.17Portsmouth, Sunday, 22 November
Climate normal for this date — 60-year average.
0.14Portsmouth, Monday, 23 November
Climate normal for this date — 60-year average.
0.09Portsmouth, Tuesday, 24 November
Climate normal for this date — 60-year average.
0.15Portsmouth, Wednesday, 25 November
Climate normal for this date — 60-year average.
0.21Portsmouth, Thursday, 26 November
Climate normal for this date — 60-year average.
0.16Portsmouth, Friday, 27 November
Climate normal for this date — 60-year average.
0.19Portsmouth, Saturday, 28 November
Climate normal for this date — 60-year average.
0.1Portsmouth, Sunday, 29 November
Climate normal for this date — 60-year average.
0.13Portsmouth, Monday, 30 November
Climate normal for this date — 60-year average.
0.14Portsmouth, Tuesday, 1 December
Climate normal for this date — 60-year average.
0.15Portsmouth, Wednesday, 2 December
Climate normal for this date — 60-year average.
0.17Portsmouth, Thursday, 3 December
Climate normal for this date — 60-year average.
0.13Portsmouth, Friday, 4 December
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 Portsmouth, NH 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 Portsmouth, NH 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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