Weather in Port Herman, MD
Port Herman, Monday, 26 October, 02:21
Clear. Feels like 42°. High 70°, low 41°.
Monthly outlook for Port Herman, MD: average high 59.3°, average low 43.9°. That is 0.2° above the climate normal for October. Precipitation is expected on 4 days (about 0.5 inches), against a normal of 4 days and 1.8 inches. The warmest day looks like 30 October (72.8°), the coolest 10 November (31°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 26 October – 4 November | 63.8° | 60.1° | +2.1° |
| 5 November – 14 November | 51.8° | 55.6° | -2.1° |
| 15 November – 24 November | at normal | 51.8° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Aberdeen Proving Ground (12 mi).
0
Port Herman, Tuesday, 27 October
Clear. High 67°, low 47°.
0
Port Herman, Wednesday, 28 October
Mostly clear. High 64°, low 48°.
0Port Herman, Thursday, 29 October
Mostly clear. High 65°, low 53°.
0Port Herman, Friday, 30 October
Clear. High 73°, low 54°.
0
Port Herman, Saturday, 31 October
Overcast. High 63°, low 49°.
0Port Herman, Sunday, 1 November
Overcast. High 64°, low 46°.
0.22
Port Herman, Monday, 2 November
Light rain. High 62°, low 52°.
0.04Port Herman, Tuesday, 3 November
Light rain. High 62°, low 52°.
0Port Herman, Wednesday, 4 November
Overcast. High 49°, low 47°.
0Port Herman, Thursday, 5 November
Overcast. High 49°, low 40°.
0Port Herman, Friday, 6 November
Clear. High 50°, low 34°.
0Port Herman, Saturday, 7 November
Clear. High 54°, low 34°.
0.15Port Herman, Sunday, 8 November
Light rain. High 51°, low 39°.
0.08Port Herman, Monday, 9 November
Light rain. High 53°, low 37°.
0
Port Herman, Tuesday, 10 November
Partly cloudy. High 53°, low 31°.
0.15Port Herman, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.2
Port Herman, Thursday, 12 November
Climate normal for this date — 60-year average.
0.11Port Herman, Friday, 13 November
Climate normal for this date — 60-year average.
0.07Port Herman, Saturday, 14 November
Climate normal for this date — 60-year average.
0.1Port Herman, Sunday, 15 November
Climate normal for this date — 60-year average.
0.13Port Herman, Monday, 16 November
Climate normal for this date — 60-year average.
0.07Port Herman, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.06Port Herman, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.1Port Herman, Thursday, 19 November
Climate normal for this date — 60-year average.
0.07Port Herman, Friday, 20 November
Climate normal for this date — 60-year average.
0.09Port Herman, Saturday, 21 November
Climate normal for this date — 60-year average.
0.11Port Herman, Sunday, 22 November
Climate normal for this date — 60-year average.
0.07Port Herman, Monday, 23 November
Climate normal for this date — 60-year average.
0.13Port Herman, Tuesday, 24 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 Port Herman, MD 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 Port Herman, MD 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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