Monthly outlook for Port Herman, MD: average high 56°, average low 40.5°. That is 2.5° above the climate normal for November. Precipitation is expected on 1 day (about 0.5 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 29 November (68.5°), the coolest 25 November (29.9°).
56°/40.5°
Average high / low
+2.5°
Above normal
1 / 5
Wet days / normal
0.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
14 November – 23 November
55.3°
52.1°
+1.8°
24 November – 3 December
57.2°
49.6°
+4.2°
4 December – 13 December
at normal
45.4°
—
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).
Sun, 1550° / 42°0
50 °
Port Herman, Sunday, 15 November
Overcast. High 50°, low 42°.
Pressure30.21 inHg
Wind13.3 mph NW
Humidity52%
Visibility6.2 mi
Dew point32°
Mon, 1650° / 41°0
50 °
Port Herman, Monday, 16 November
Overcast. High 50°, low 41°.
Pressure30.45 inHg
Wind10 mph NW
Humidity56%
Visibility6.2 mi
Dew point34°
Tue, 1753° / 39°0
53 °
Port Herman, Tuesday, 17 November
Clear. High 53°, low 39°.
Pressure30.53 inHg
Wind6.9 mph NW
Humidity58%
Visibility6.2 mi
Dew point37°
Wed, 1858° / 41°0
58 °
Port Herman, Wednesday, 18 November
Clear. High 58°, low 41°.
Pressure30.47 inHg
Wind4.1 mph NW
Humidity54%
Visibility6.2 mi
Dew point39°
Thu, 1960° / 42°0
60 °
Port Herman, Thursday, 19 November
Clear. High 60°, low 42°.
Pressure30.45 inHg
Wind5.1 mph SW
Humidity67%
Visibility—
Dew point40°
Fri, 2064° / 46°0
64 °
Port Herman, Friday, 20 November
Clear. High 64°, low 46°.
Pressure30.30 inHg
Wind8.7 mph NW
Humidity51%
Visibility—
Dew point38°
Sat, 2159° / 42°0
59 °
Port Herman, Saturday, 21 November
Clear. High 59°, low 42°.
Pressure30.39 inHg
Wind5.4 mph N
Humidity58%
Visibility—
Dew point37°
Sun, 2261° / 43°0
61 °
Port Herman, Sunday, 22 November
Overcast. High 61°, low 43°.
Pressure30.09 inHg
Wind14.5 mph SW
Humidity69%
Visibility—
Dew point45°
Mon, 2349° / 38°0
49 °
Port Herman, Monday, 23 November
Clear. High 49°, low 38°.
Pressure29.97 inHg
Wind18.8 mph NW
Humidity44%
Visibility—
Dew point25°
Tue, 2447° / 31°0
47 °
Port Herman, Tuesday, 24 November
Clear. High 47°, low 31°.
Pressure30.30 inHg
Wind13.4 mph NW
Humidity51%
Visibility—
Dew point23°
Wed, 2546° / 30°0
46 °
Port Herman, Wednesday, 25 November
Overcast. High 46°, low 30°.
Pressure30.47 inHg
Wind5.1 mph SW
Humidity51%
Visibility—
Dew point22°
Thu, 2653° / 34°0
53 °
Port Herman, Thursday, 26 November
Overcast. High 53°, low 34°.
Pressure30.42 inHg
Wind7.2 mph SW
Humidity67%
Visibility—
Dew point35°
Fri, 2761° / 46°0
61 °
Port Herman, Friday, 27 November
Mostly clear. High 61°, low 46°.
Pressure30.45 inHg
Wind4.3 mph SE
Humidity56%
Visibility—
Dew point38°
Sat, 2867° / 46°0
67 °
Port Herman, Saturday, 28 November
Mostly clear. High 67°, low 46°.
Pressure30.39 inHg
Wind10.9 mph S
Humidity81%
Visibility—
Dew point50°
Sun, 2969° / 49°0.51
69 °
Port Herman, Sunday, 29 November
Rain. High 69°, low 49°.
Pressure30.03 inHg
Wind15.9 mph SW
Humidity76%
Visibility—
Dew point60°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 3048° / 37°0.12
48 °
Port Herman, Monday, 30 November
Climate normal for this date — 60-year average.
Average high48°
Average low37°
Average precipitation0.12 in
Chance of precipitation32%
Record high66° (2001)
Record low22° (1976)
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)
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.