Monthly outlook for Port Republic, MD: average high 83.2°, average low 68.3°. That is 0.1° above the climate normal for August. Precipitation is expected on 8 days (about 1.7 inches), against a normal of 6 days and 2.3 inches. The warmest day looks like 10 August (93.9°), the coolest 15 August (59.3°).
83.2°/68.3°
Average high / low
+0.1°
Above normal
8 / 6
Wet days / normal
1.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
83.5°
83.8°
-0.2°
19 August – 28 August
82.7°
82.4°
+0.2°
29 August – 7 September
at normal
81.3°
—
August records over 66 years
99.5°15 August 1988All-time high
55.8°29 August 1982All-time low
Climate normals and records are computed from the nearest reference point — North Beach (14 mi).
Mon, 1094° / 73°0.06
94 °
Port Republic, Monday, 10 August
Rain. High 94°, low 73°.
Pressure30.00 inHg
Wind5 mph NW
Humidity49%
Visibility6.2 mi
Dew point69°
Tue, 1191° / 71°0.61
91 °
Port Republic, Tuesday, 11 August
Heavy rain. High 91°, low 71°.
Pressure29.94 inHg
Wind4.5 mph NW
Humidity54%
Visibility6.2 mi
Dew point67°
Wed, 1288° / 73°0.08
88 °
Port Republic, Wednesday, 12 August
Light rain. High 88°, low 73°.
Pressure29.80 inHg
Wind7.8 mph SW
Humidity89%
Visibility6.2 mi
Dew point71°
Thu, 1387° / 71°0.13
87 °
Port Republic, Thursday, 13 August
Light rain. High 87°, low 71°.
Pressure29.83 inHg
Wind11.7 mph NW
Humidity43%
Visibility—
Dew point60°
Fri, 1473° / 60°0
73 °
Port Republic, Friday, 14 August
Overcast. High 73°, low 60°.
Pressure30.09 inHg
Wind6.9 mph SW
Humidity53%
Visibility—
Dew point53°
Sat, 1580° / 59°0
80 °
Port Republic, Saturday, 15 August
Clear. High 80°, low 59°.
Pressure30.18 inHg
Wind10 mph N
Humidity37%
Visibility—
Dew point49°
Sun, 1678° / 65°0
78 °
Port Republic, Sunday, 16 August
Mostly clear. High 78°, low 65°.
Pressure30.18 inHg
Wind9.9 mph S
Humidity46%
Visibility—
Dew point55°
Mon, 1783° / 68°0.01
83 °
Port Republic, Monday, 17 August
Light rain. High 83°, low 68°.
Pressure30.09 inHg
Wind10.9 mph S
Humidity48%
Visibility—
Dew point59°
Tue, 1872° / 68°0.37
72 °
Port Republic, Tuesday, 18 August
Light rain. High 72°, low 68°.
Pressure30.03 inHg
Wind7.7 mph S
Humidity93%
Visibility—
Dew point68°
Wed, 1980° / 70°0.25
80 °
Port Republic, Wednesday, 19 August
Light rain. High 80°, low 70°.
Pressure29.91 inHg
Wind10.2 mph S
Humidity81%
Visibility—
Dew point70°
Thu, 2082° / 69°0.1
82 °
Port Republic, Thursday, 20 August
Light rain. High 82°, low 69°.
Pressure29.74 inHg
Wind14 mph NW
Humidity43%
Visibility—
Dew point56°
Fri, 2181° / 62°0
81 °
Port Republic, Friday, 21 August
Clear. High 81°, low 62°.
Pressure29.91 inHg
Wind12.1 mph NW
Humidity35%
Visibility—
Dew point47°
Sat, 2277° / 66°0
77 °
Port Republic, Saturday, 22 August
Mostly clear. High 77°, low 66°.
Pressure30.06 inHg
Wind10.2 mph NE
Humidity45%
Visibility—
Dew point52°
Sun, 2385° / 71°0.04
85 °
Port Republic, Sunday, 23 August
Light rain. High 85°, low 71°.
Pressure30.00 inHg
Wind13.5 mph SW
Humidity75%
Visibility—
Dew point68°
Mon, 2492° / 71°0
92 °
Port Republic, Monday, 24 August
Clear. High 92°, low 71°.
Pressure29.91 inHg
Wind9.2 mph SW
Humidity44%
Visibility—
Dew point64°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2583° / 70°0.06
83 °
Port Republic, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high83°
Average low70°
Average precipitation0.06 in
Chance of precipitation18%
Record high95° (2007)
Record low61° (1977)
Wed, 2683° / 70°0.05
83 °
Port Republic, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high83°
Average low70°
Average precipitation0.05 in
Chance of precipitation23%
Record high92° (1975)
Record low62° (1963)
Thu, 2783° / 71°0.16
83 °
Port Republic, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high83°
Average low71°
Average precipitation0.16 in
Chance of precipitation35%
Record high93° (1987)
Record low62° (2025)
Fri, 2883° / 71°0.17
83 °
Port Republic, Friday, 28 August
Climate normal for this date — 60-year average.
Average high83°
Average low71°
Average precipitation0.17 in
Chance of precipitation43%
Record high94° (1973)
Record low60° (1986)
Sat, 2983° / 71°0.12
83 °
Port Republic, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high83°
Average low71°
Average precipitation0.12 in
Chance of precipitation33%
Record high92° (2006)
Record low56° (1982)
Sun, 3083° / 70°0.07
83 °
Port Republic, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high83°
Average low70°
Average precipitation0.07 in
Chance of precipitation23%
Record high92° (1973)
Record low58° (1986)
Mon, 3182° / 70°0.11
82 °
Port Republic, Monday, 31 August
Climate normal for this date — 60-year average.
Average high82°
Average low70°
Average precipitation0.11 in
Chance of precipitation28%
Record high93° (1973)
Record low59° (1986)
Tue, 0181° / 69°0.19
81 °
Port Republic, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high81°
Average low69°
Average precipitation0.19 in
Chance of precipitation35%
Record high94° (1980)
Record low59° (1967)
Wed, 0281° / 69°0.1
81 °
Port Republic, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high81°
Average low69°
Average precipitation0.1 in
Chance of precipitation33%
Record high94° (1980)
Record low59° (1967)
Thu, 0381° / 69°0.12
81 °
Port Republic, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high81°
Average low69°
Average precipitation0.12 in
Chance of precipitation25%
Record high92° (1993)
Record low57° (1967)
Fri, 0481° / 69°0.08
81 °
Port Republic, Friday, 4 September
Climate normal for this date — 60-year average.
Average high81°
Average low69°
Average precipitation0.08 in
Chance of precipitation23%
Record high93° (2023)
Record low57° (1997)
Sat, 0581° / 69°0.12
81 °
Port Republic, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high81°
Average low69°
Average precipitation0.12 in
Chance of precipitation32%
Record high91° (1985)
Record low57° (1997)
Sun, 0680° / 68°0.2
80 °
Port Republic, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high80°
Average low68°
Average precipitation0.2 in
Chance of precipitation38%
Record high93° (1983)
Record low57° (1962)
Mon, 0780° / 67°0.07
80 °
Port Republic, Monday, 7 September
Climate normal for this date — 60-year average.
Average high80°
Average low67°
Average precipitation0.07 in
Chance of precipitation28%
Record high92° (1983)
Record low58° (1988)
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 Republic, 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 Republic, 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.