Monthly outlook for Port Herman, MD: average high 58°, average low 41.9°. That is 3.2° above the climate normal for November. Precipitation is expected on 3 days (about 0.7 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 25 November (68.8°), the coolest 18 November (35.8°).
58°/41.9°
Average high / low
+3.2°
Above normal
3 / 5
Wet days / normal
0.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 November – 20 November
55.4°
53.1°
+1.3°
21 November – 30 November
62.3°
50.4°
+6.6°
1 December – 10 December
at normal
46.4°
—
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).
Thu, 1262° / 42°0.1
62 °
Port Herman, Thursday, 12 November
Light rain. High 62°, low 42°.
Pressure29.44 inHg
Wind3.6 mph SW
Humidity85%
Visibility6.2 mi
Dew point54°
Fri, 1347° / 37°0.11
47 °
Port Herman, Friday, 13 November
Light rain. High 47°, low 37°.
Pressure29.65 inHg
Wind12.9 mph NW
Humidity80%
Visibility6.2 mi
Dew point38°
Sat, 1448° / 39°0
48 °
Port Herman, Saturday, 14 November
Overcast. High 48°, low 39°.
Pressure29.88 inHg
Wind14.3 mph NW
Humidity56%
Visibility6.2 mi
Dew point29°
Sun, 1551° / 41°0
51 °
Port Herman, Sunday, 15 November
Partly cloudy. High 51°, low 41°.
Pressure30.15 inHg
Wind15.3 mph NW
Humidity60%
Visibility6.2 mi
Dew point37°
Mon, 1651° / 41°0
51 °
Port Herman, Monday, 16 November
Partly cloudy. High 51°, low 41°.
Pressure30.45 inHg
Wind10.4 mph NW
Humidity58%
Visibility—
Dew point33°
Tue, 1754° / 40°0
54 °
Port Herman, Tuesday, 17 November
Clear. High 54°, low 40°.
Pressure30.50 inHg
Wind7.2 mph NW
Humidity61%
Visibility—
Dew point35°
Wed, 1856° / 36°0
56 °
Port Herman, Wednesday, 18 November
Clear. High 56°, low 36°.
Pressure30.47 inHg
Wind5 mph N
Humidity53%
Visibility—
Dew point31°
Thu, 1959° / 38°0
59 °
Port Herman, Thursday, 19 November
Clear. High 59°, low 38°.
Pressure30.39 inHg
Wind4.1 mph NW
Humidity49%
Visibility—
Dew point31°
Fri, 2060° / 40°0
60 °
Port Herman, Friday, 20 November
Clear. High 60°, low 40°.
Pressure30.30 inHg
Wind4 mph N
Humidity48%
Visibility—
Dew point32°
Sat, 2160° / 42°0
60 °
Port Herman, Saturday, 21 November
Overcast. High 60°, low 42°.
Pressure30.15 inHg
Wind4.8 mph W
Humidity44%
Visibility—
Dew point30°
Sun, 2262° / 44°0
62 °
Port Herman, Sunday, 22 November
Overcast. High 62°, low 44°.
Pressure30.15 inHg
Wind5.8 mph S
Humidity56%
Visibility—
Dew point39°
Mon, 2362° / 46°0
62 °
Port Herman, Monday, 23 November
Overcast. High 62°, low 46°.
Pressure30.12 inHg
Wind7.9 mph SW
Humidity57%
Visibility—
Dew point40°
Tue, 2468° / 49°0.04
68 °
Port Herman, Tuesday, 24 November
Light rain. High 68°, low 49°.
Pressure30.12 inHg
Wind9.4 mph E
Humidity68%
Visibility—
Dew point49°
Wed, 2569° / 56°0.43
69 °
Port Herman, Wednesday, 25 November
Rain. High 69°, low 56°.
Pressure29.80 inHg
Wind17.2 mph S
Humidity90%
Visibility—
Dew point65°
Thu, 2652° / 40°0
52 °
Port Herman, Thursday, 26 November
Partly cloudy. High 52°, low 40°.
Pressure30.21 inHg
Wind15.8 mph NW
Humidity48%
Visibility—
Dew point30°
From day 17 onward the outlook is built from 60-year climate statistics
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)
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)
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.