Monthly outlook for Port Herman, MD: average high 55.6°, average low 41.7°. That is 2.4° above the climate normal for November. Precipitation is expected on 1 day (about 0.3 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 20 November (63.6°), the coolest 30 November (32.8°).
55.6°/41.7°
Average high / low
+2.4°
Above normal
1 / 5
Wet days / normal
0.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
15 November – 24 November
56.6°
51.8°
+2.6°
25 November – 4 December
54.1°
49.3°
+2.7°
5 December – 14 December
at normal
45.1°
—
November records over 66 years
78.1°1 November 2024All-time high
21.6°23 November 2018All-time low
Climate normals and records are computed from the nearest reference point — Aberdeen Proving Ground (12 mi).
Mon, 1653° / 43°0
53 °
Port Herman, Monday, 16 November
Overcast. High 53°, low 43°.
Pressure30.45 inHg
Wind9.9 mph NW
Humidity56%
Visibility6.2 mi
Dew point35°
Tue, 1756° / 40°0
56 °
Port Herman, Tuesday, 17 November
Clear. High 56°, low 40°.
Pressure30.53 inHg
Wind6.2 mph NW
Humidity57%
Visibility6.2 mi
Dew point38°
Wed, 1859° / 43°0
59 °
Port Herman, Wednesday, 18 November
Clear. High 59°, low 43°.
Pressure30.50 inHg
Wind4.9 mph NW
Humidity52%
Visibility6.2 mi
Dew point40°
Thu, 1960° / 43°0
60 °
Port Herman, Thursday, 19 November
Clear. High 60°, low 43°.
Pressure30.47 inHg
Wind6.1 mph SW
Humidity63%
Visibility—
Dew point40°
Fri, 2064° / 48°0
64 °
Port Herman, Friday, 20 November
Clear. High 64°, low 48°.
Pressure30.33 inHg
Wind7.3 mph N
Humidity55%
Visibility—
Dew point40°
Sat, 2160° / 45°0
60 °
Port Herman, Saturday, 21 November
Overcast. High 60°, low 45°.
Pressure30.36 inHg
Wind6.3 mph N
Humidity60%
Visibility—
Dew point41°
Sun, 2262° / 47°0
62 °
Port Herman, Sunday, 22 November
Overcast. High 62°, low 47°.
Pressure30.12 inHg
Wind5.5 mph N
Humidity70%
Visibility—
Dew point47°
Mon, 2353° / 42°0
53 °
Port Herman, Monday, 23 November
Overcast. High 53°, low 42°.
Pressure29.94 inHg
Wind16.4 mph N
Humidity54%
Visibility—
Dew point35°
Tue, 2450° / 37°0
50 °
Port Herman, Tuesday, 24 November
Clear. High 50°, low 37°.
Pressure30.21 inHg
Wind14.5 mph N
Humidity57%
Visibility—
Dew point29°
Wed, 2552° / 35°0
52 °
Port Herman, Wednesday, 25 November
Partly cloudy. High 52°, low 35°.
Pressure30.39 inHg
Wind4.7 mph N
Humidity60%
Visibility—
Dew point32°
Thu, 2655° / 37°0
55 °
Port Herman, Thursday, 26 November
Clear. High 55°, low 37°.
Pressure30.42 inHg
Wind4.7 mph W
Humidity57%
Visibility—
Dew point33°
Fri, 2758° / 40°0.01
58 °
Port Herman, Friday, 27 November
Light rain. High 58°, low 40°.
Pressure30.39 inHg
Wind9.1 mph SE
Humidity62%
Visibility—
Dew point37°
Sat, 2861° / 56°0.24
61 °
Port Herman, Saturday, 28 November
Rain. High 61°, low 56°.
Pressure29.97 inHg
Wind10 mph SE
Humidity96%
Visibility—
Dew point60°
Sun, 2955° / 39°0
55 °
Port Herman, Sunday, 29 November
Overcast. High 55°, low 39°.
Pressure29.91 inHg
Wind16.9 mph NW
Humidity67%
Visibility—
Dew point40°
Mon, 3043° / 33°0
43 °
Port Herman, Monday, 30 November
Overcast. High 43°, low 33°.
Pressure30.24 inHg
Wind9.1 mph N
Humidity46%
Visibility—
Dew point19°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 0148° / 37°0.12
48 °
Port Herman, Tuesday, 1 December
Climate normal for this date — 60-year average.
Average high48°
Average low37°
Average precipitation0.12 in
Chance of precipitation32%
Record high68° (2006)
Record low19° (1967)
Wed, 0247° / 36°0.12
47 °
Port Herman, Wednesday, 2 December
Climate normal for this date — 60-year average.
Average high47°
Average low36°
Average precipitation0.12 in
Chance of precipitation27%
Record high64° (1970)
Record low13° (1967)
Thu, 0348° / 36°0.1
48 °
Port Herman, Thursday, 3 December
Climate normal for this date — 60-year average.
Average high48°
Average low36°
Average precipitation0.1 in
Chance of precipitation23%
Record high65° (1998)
Record low19° (1976)
Fri, 0447° / 35°0.09
47 °
Port Herman, Friday, 4 December
Climate normal for this date — 60-year average.
Average high47°
Average low35°
Average precipitation0.09 in
Chance of precipitation20%
Record high71° (1998)
Record low16° (1966)
Sat, 0546° / 35°0.16
46 °
Port Herman, Saturday, 5 December
Climate normal for this date — 60-year average.
Average high46°
Average low35°
Average precipitation0.16 in
Chance of precipitation32%
Record high67° (1998)
Record low25° (1966)
Sun, 0647° / 35°0.1
47 °
Port Herman, Sunday, 6 December
Climate normal for this date — 60-year average.
Average high47°
Average low35°
Average precipitation0.1 in
Chance of precipitation35%
Record high69° (1998)
Record low21° (2007)
Mon, 0746° / 35°0.11
46 °
Port Herman, Monday, 7 December
Climate normal for this date — 60-year average.
Average high46°
Average low35°
Average precipitation0.11 in
Chance of precipitation18%
Record high72° (1998)
Record low18° (2002)
Tue, 0845° / 34°0.09
45 °
Port Herman, Tuesday, 8 December
Climate normal for this date — 60-year average.
Average high45°
Average low34°
Average precipitation0.09 in
Chance of precipitation25%
Record high65° (1978)
Record low19° (2003)
Wed, 0945° / 33°0.2
45 °
Port Herman, Wednesday, 9 December
Climate normal for this date — 60-year average.
Average high45°
Average low33°
Average precipitation0.2 in
Chance of precipitation38%
Record high65° (1991)
Record low16° (1989)
Thu, 1046° / 35°0.14
46 °
Port Herman, Thursday, 10 December
Climate normal for this date — 60-year average.
Average high46°
Average low35°
Average precipitation0.14 in
Chance of precipitation38%
Record high63° (1966)
Record low16° (1968)
Fri, 1145° / 34°0.2
45 °
Port Herman, Friday, 11 December
Climate normal for this date — 60-year average.
Average high45°
Average low34°
Average precipitation0.2 in
Chance of precipitation37%
Record high64° (2021)
Record low17° (1968)
Sat, 1245° / 34°0.09
45 °
Port Herman, Saturday, 12 December
Climate normal for this date — 60-year average.
Average high45°
Average low34°
Average precipitation0.09 in
Chance of precipitation23%
Record high64° (2015)
Record low12° (1962)
Sun, 1345° / 34°0.14
45 °
Port Herman, Sunday, 13 December
Climate normal for this date — 60-year average.
Average high45°
Average low34°
Average precipitation0.14 in
Chance of precipitation30%
Record high66° (2015)
Record low8° (1960)
Mon, 1444° / 33°0.15
44 °
Port Herman, Monday, 14 December
Climate normal for this date — 60-year average.
Average high44°
Average low33°
Average precipitation0.15 in
Chance of precipitation35%
Record high65° (2015)
Record low11° (1960)
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.