Monthly outlook for Port Herman, MD: average high 61.1°, average low 46.6°. That is 3.5° above the climate normal for November. Precipitation is expected on 3 days (about 0.3 inches), against a normal of 4 days and 1.7 inches. The warmest day looks like 4 November (74.9°), the coolest 19 November (36.7°).
61.1°/46.6°
Average high / low
+3.5°
Above normal
3 / 4
Wet days / normal
0.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
4 November – 13 November
61.7°
56.1°
+3.1°
14 November – 23 November
60.1°
52.1°
+4.5°
24 November – 3 December
at normal
49.6°
—
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).
Thu, 0575° / 58°0.11
75 °
Port Herman, Thursday, 5 November
Light rain. High 75°, low 58°.
Pressure29.88 inHg
Wind14.7 mph SW
Humidity85%
Visibility6.2 mi
Dew point64°
Fri, 0674° / 57°0.09
74 °
Port Herman, Friday, 6 November
Light rain. High 74°, low 57°.
Pressure29.88 inHg
Wind1.5 mph N
Humidity78%
Visibility6.2 mi
Dew point61°
Sat, 0758° / 49°0
58 °
Port Herman, Saturday, 7 November
Overcast. High 58°, low 49°.
Pressure29.91 inHg
Wind11.6 mph NW
Humidity54%
Visibility6.2 mi
Dew point39°
Sun, 0859° / 49°0
59 °
Port Herman, Sunday, 8 November
Overcast. High 59°, low 49°.
Pressure29.94 inHg
Wind13.4 mph W
Humidity51%
Visibility6.2 mi
Dew point40°
Mon, 0958° / 50°0
58 °
Port Herman, Monday, 9 November
Overcast. High 58°, low 50°.
Pressure29.97 inHg
Wind19.2 mph NW
Humidity52%
Visibility—
Dew point38°
Tue, 1061° / 45°0
61 °
Port Herman, Tuesday, 10 November
Mostly clear. High 61°, low 45°.
Pressure30.03 inHg
Wind10.5 mph SW
Humidity60%
Visibility—
Dew point40°
Wed, 1160° / 43°0
60 °
Port Herman, Wednesday, 11 November
Mostly clear. High 60°, low 43°.
Pressure29.88 inHg
Wind13.2 mph NW
Humidity52%
Visibility—
Dew point37°
Thu, 1250° / 38°0
50 °
Port Herman, Thursday, 12 November
Overcast. High 50°, low 38°.
Pressure29.80 inHg
Wind15.7 mph NW
Humidity53%
Visibility—
Dew point30°
Fri, 1348° / 37°0
48 °
Port Herman, Friday, 13 November
Partly cloudy. High 48°, low 37°.
Pressure29.77 inHg
Wind18.5 mph NW
Humidity53%
Visibility—
Dew point27°
Sat, 1457° / 40°0
57 °
Port Herman, Saturday, 14 November
Overcast. High 57°, low 40°.
Pressure29.85 inHg
Wind15.5 mph W
Humidity47%
Visibility—
Dew point29°
Sun, 1564° / 47°0
64 °
Port Herman, Sunday, 15 November
Clear. High 64°, low 47°.
Pressure29.91 inHg
Wind13.8 mph W
Humidity48%
Visibility—
Dew point37°
Mon, 1667° / 49°0
67 °
Port Herman, Monday, 16 November
Partly cloudy. High 67°, low 49°.
Pressure29.85 inHg
Wind16.6 mph W
Humidity58%
Visibility—
Dew point44°
Tue, 1765° / 54°0.09
65 °
Port Herman, Tuesday, 17 November
Light rain. High 65°, low 54°.
Pressure29.85 inHg
Wind9.6 mph W
Humidity50%
Visibility—
Dew point42°
Wed, 1853° / 41°0.01
53 °
Port Herman, Wednesday, 18 November
Light rain. High 53°, low 41°.
Pressure30.03 inHg
Wind15.1 mph N
Humidity60%
Visibility—
Dew point35°
Thu, 1954° / 37°0
54 °
Port Herman, Thursday, 19 November
Partly cloudy. High 54°, low 37°.
Pressure30.33 inHg
Wind5.9 mph S
Humidity56%
Visibility—
Dew point31°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 2052° / 40°0.07
52 °
Port Herman, Friday, 20 November
Climate normal for this date — 60-year average.
Average high52°
Average low40°
Average precipitation0.07 in
Chance of precipitation23%
Record high72° (1985)
Record low28° (2022)
Sat, 2151° / 39°0.09
51 °
Port Herman, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high51°
Average low39°
Average precipitation0.09 in
Chance of precipitation25%
Record high69° (1991)
Record low25° (2022)
Sun, 2250° / 39°0.11
50 °
Port Herman, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high50°
Average low39°
Average precipitation0.11 in
Chance of precipitation30%
Record high69° (2007)
Record low23° (2018)
Mon, 2350° / 38°0.07
50 °
Port Herman, Monday, 23 November
Climate normal for this date — 60-year average.
Average high50°
Average low38°
Average precipitation0.07 in
Chance of precipitation25%
Record high65° (1979)
Record low22° (2018)
Tue, 2451° / 39°0.13
51 °
Port Herman, Tuesday, 24 November
Climate normal for this date — 60-year average.
Average high51°
Average low39°
Average precipitation0.13 in
Chance of precipitation32%
Record high66° (1979)
Record low24° (1970)
Wed, 2550° / 38°0.11
50 °
Port Herman, Wednesday, 25 November
Climate normal for this date — 60-year average.
Average high50°
Average low38°
Average precipitation0.11 in
Chance of precipitation37%
Record high69° (1979)
Record low22° (1989)
Thu, 2652° / 39°0.15
52 °
Port Herman, Thursday, 26 November
Climate normal for this date — 60-year average.
Average high52°
Average low39°
Average precipitation0.15 in
Chance of precipitation38%
Record high66° (1999)
Record low28° (2005)
Fri, 2751° / 39°0.09
51 °
Port Herman, Friday, 27 November
Climate normal for this date — 60-year average.
Average high51°
Average low39°
Average precipitation0.09 in
Chance of precipitation35%
Record high62° (1976)
Record low27° (1974)
Sat, 2852° / 40°0.17
52 °
Port Herman, Saturday, 28 November
Climate normal for this date — 60-year average.
Average high52°
Average low40°
Average precipitation0.17 in
Chance of precipitation30%
Record high66° (2011)
Record low26° (1996)
Sun, 2949° / 38°0.15
49 °
Port Herman, Sunday, 29 November
Climate normal for this date — 60-year average.
Average high49°
Average low38°
Average precipitation0.15 in
Chance of precipitation30%
Record high65° (1998)
Record low24° (2023)
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)
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.