Monthly outlook for Port Tobacco, MD: average high 87.3°, average low 66.3°. That is 1.3° above the climate normal for August. Precipitation is expected on 3 days (about 1.0 inches), against a normal of 6 days and 1.9 inches. The warmest day looks like 10 August (94.3°), the coolest 16 August (56.3°).
87.3°/66.3°
Average high / low
+1.3°
Above normal
3 / 6
Wet days / normal
1.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
86.7°
85.7°
+0.5°
19 August – 28 August
88.5°
84.4°
+2.3°
29 August – 7 September
at normal
83.1°
—
August records over 66 years
102.9°20 August 1983All-time high
54.1°30 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Quantico (15 mi).
Mon, 1094° / 75°0.01
94 °
Port Tobacco, Monday, 10 August
Light rain. High 94°, low 75°.
Pressure30.00 inHg
Wind3 mph W
Humidity34%
Visibility6.2 mi
Dew point62°
Tue, 1190° / 69°0.03
90 °
Port Tobacco, Tuesday, 11 August
Light rain. High 90°, low 69°.
Pressure29.91 inHg
Wind7.7 mph W
Humidity50%
Visibility6.2 mi
Dew point66°
Wed, 1289° / 71°0.01
89 °
Port Tobacco, Wednesday, 12 August
Light rain. High 89°, low 71°.
Pressure29.85 inHg
Wind8.7 mph NW
Humidity54%
Visibility6.2 mi
Dew point65°
Thu, 1391° / 70°0
91 °
Port Tobacco, Thursday, 13 August
Partly cloudy. High 91°, low 70°.
Pressure29.88 inHg
Wind11.8 mph NW
Humidity48%
Visibility6.2 mi
Dew point65°
Fri, 1471° / 60°0.4
71 °
Port Tobacco, Friday, 14 August
Rain. High 71°, low 60°.
Pressure30.09 inHg
Wind3.5 mph N
Humidity97%
Visibility—
Dew point62°
Sat, 1582° / 59°0
82 °
Port Tobacco, Saturday, 15 August
Overcast. High 82°, low 59°.
Pressure30.18 inHg
Wind7.8 mph N
Humidity31%
Visibility—
Dew point44°
Sun, 1683° / 56°0.02
83 °
Port Tobacco, Sunday, 16 August
Light rain. High 83°, low 56°.
Pressure30.15 inHg
Wind9.1 mph SE
Humidity34%
Visibility—
Dew point49°
Mon, 1786° / 66°0.07
86 °
Port Tobacco, Monday, 17 August
Light rain. High 86°, low 66°.
Pressure29.88 inHg
Wind9.5 mph S
Humidity50%
Visibility—
Dew point63°
Tue, 1888° / 64°0
88 °
Port Tobacco, Tuesday, 18 August
Partly cloudy. High 88°, low 64°.
Pressure29.94 inHg
Wind5.4 mph S
Humidity39%
Visibility—
Dew point58°
Wed, 1988° / 67°0.49
88 °
Port Tobacco, Wednesday, 19 August
Rain. High 88°, low 67°.
Pressure29.83 inHg
Wind9.1 mph S
Humidity53%
Visibility—
Dew point66°
Thu, 2088° / 66°0
88 °
Port Tobacco, Thursday, 20 August
Clear. High 88°, low 66°.
Pressure29.77 inHg
Wind11.6 mph NW
Humidity39%
Visibility—
Dew point58°
Fri, 2184° / 64°0
84 °
Port Tobacco, Friday, 21 August
Overcast. High 84°, low 64°.
Pressure29.88 inHg
Wind7.7 mph NW
Humidity43%
Visibility—
Dew point55°
Sat, 2294° / 65°0
94 °
Port Tobacco, Saturday, 22 August
Clear. High 94°, low 65°.
Pressure29.91 inHg
Wind11.2 mph S
Humidity35%
Visibility—
Dew point57°
Sun, 2393° / 72°0
93 °
Port Tobacco, Sunday, 23 August
Mostly clear. High 93°, low 72°.
Pressure29.91 inHg
Wind10.8 mph W
Humidity31%
Visibility—
Dew point56°
Mon, 2484° / 63°0
84 °
Port Tobacco, Monday, 24 August
Clear. High 84°, low 63°.
Pressure30.15 inHg
Wind7 mph N
Humidity28%
Visibility—
Dew point45°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2585° / 69°0.07
85 °
Port Tobacco, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high85°
Average low69°
Average precipitation0.07 in
Chance of precipitation17%
Record high98° (1998)
Record low60° (2024)
Wed, 2685° / 69°0.04
85 °
Port Tobacco, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high85°
Average low69°
Average precipitation0.04 in
Chance of precipitation13%
Record high95° (2006)
Record low59° (1977)
Thu, 2785° / 70°0.13
85 °
Port Tobacco, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high85°
Average low70°
Average precipitation0.13 in
Chance of precipitation32%
Record high98° (1987)
Record low59° (2025)
Fri, 2886° / 70°0.17
86 °
Port Tobacco, Friday, 28 August
Climate normal for this date — 60-year average.
Average high86°
Average low70°
Average precipitation0.17 in
Chance of precipitation42%
Record high100° (2024)
Record low58° (2025)
Sat, 2984° / 70°0.13
84 °
Port Tobacco, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high84°
Average low70°
Average precipitation0.13 in
Chance of precipitation33%
Record high96° (2006)
Record low55° (1986)
Sun, 3085° / 69°0.06
85 °
Port Tobacco, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high85°
Average low69°
Average precipitation0.06 in
Chance of precipitation23%
Record high96° (2010)
Record low54° (1986)
Mon, 3184° / 69°0.09
84 °
Port Tobacco, Monday, 31 August
Climate normal for this date — 60-year average.
Average high84°
Average low69°
Average precipitation0.09 in
Chance of precipitation30%
Record high95° (1973)
Record low55° (2025)
Tue, 0182° / 68°0.15
82 °
Port Tobacco, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high82°
Average low68°
Average precipitation0.15 in
Chance of precipitation33%
Record high96° (1980)
Record low56° (1967)
Wed, 0283° / 68°0.08
83 °
Port Tobacco, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high83°
Average low68°
Average precipitation0.08 in
Chance of precipitation35%
Record high97° (1980)
Record low56° (2023)
Thu, 0383° / 68°0.12
83 °
Port Tobacco, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high83°
Average low68°
Average precipitation0.12 in
Chance of precipitation32%
Record high97° (2023)
Record low55° (2025)
Fri, 0483° / 68°0.11
83 °
Port Tobacco, Friday, 4 September
Climate normal for this date — 60-year average.
Average high83°
Average low68°
Average precipitation0.11 in
Chance of precipitation38%
Record high99° (2023)
Record low55° (2024)
Sat, 0582° / 67°0.14
82 °
Port Tobacco, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high82°
Average low67°
Average precipitation0.14 in
Chance of precipitation35%
Record high100° (2023)
Record low56° (1997)
Sun, 0682° / 67°0.22
82 °
Port Tobacco, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high82°
Average low67°
Average precipitation0.22 in
Chance of precipitation37%
Record high99° (2023)
Record low58° (1962)
Mon, 0782° / 66°0.09
82 °
Port Tobacco, Monday, 7 September
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.09 in
Chance of precipitation30%
Record high94° (1998)
Record low56° (2017)
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 Tobacco, 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 Tobacco, 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.