Monthly outlook for Highland Park, SC: average high 99°, average low 78.2°. That is 6.9° above the climate normal for August. Precipitation is expected on 4 days (about 0.7 inches), against a normal of 10 days and 3.6 inches. The warmest day looks like 17 August (107°), the coolest 10 August (71.5°).
99°/78.2°
Average high / low
+6.9°
Above normal
4 / 10
Wet days / normal
0.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
99.3°
86.7°
+7°
19 August – 28 August
98.7°
85.9°
+7.1°
29 August – 7 September
at normal
84.4°
—
August records over 66 years
100°10 August 2019All-time high
62.1°29 August 1986All-time low
Climate normals and records are computed from the nearest reference point — North Charleston (3 mi).
Mon, 1091° / 71°0.01
91 °
Highland Park, Monday, 10 August
Light rain. High 91°, low 71°.
Pressure30.12 inHg
Wind5.9 mph W
Humidity46%
Visibility6.2 mi
Dew point69°
Tue, 11101° / 78°0
101 °
Highland Park, Tuesday, 11 August
Light rain. High 101°, low 78°.
Pressure30.03 inHg
Wind6.7 mph W
Humidity37%
Visibility6.2 mi
Dew point67°
Wed, 12102° / 78°0.01
102 °
Highland Park, Wednesday, 12 August
Light rain. High 102°, low 78°.
Pressure29.91 inHg
Wind9.7 mph W
Humidity37%
Visibility6.2 mi
Dew point68°
Thu, 13103° / 80°0.01
103 °
Highland Park, Thursday, 13 August
Light rain. High 103°, low 80°.
Pressure29.94 inHg
Wind7.2 mph NW
Humidity37%
Visibility6.2 mi
Dew point69°
Fri, 14101° / 80°0.01
101 °
Highland Park, Friday, 14 August
Light rain. High 101°, low 80°.
Pressure30.03 inHg
Wind9 mph S
Humidity33%
Visibility—
Dew point64°
Sat, 15104° / 76°0.18
104 °
Highland Park, Saturday, 15 August
Rain. High 104°, low 76°.
Pressure30.09 inHg
Wind7 mph SW
Humidity32%
Visibility—
Dew point65°
Sun, 16101° / 78°0.02
101 °
Highland Park, Sunday, 16 August
Light rain. High 101°, low 78°.
Pressure30.03 inHg
Wind7.6 mph SW
Humidity36%
Visibility—
Dew point66°
Mon, 17107° / 81°0.02
107 °
Highland Park, Monday, 17 August
Light rain. High 107°, low 81°.
Pressure29.94 inHg
Wind6.8 mph NW
Humidity23%
Visibility—
Dew point58°
Tue, 1894° / 83°0.01
94 °
Highland Park, Tuesday, 18 August
Light rain. High 94°, low 83°.
Pressure30.03 inHg
Wind10.6 mph SE
Humidity57%
Visibility—
Dew point74°
Wed, 1999° / 80°0.01
99 °
Highland Park, Wednesday, 19 August
Light rain. High 99°, low 80°.
Pressure30.00 inHg
Wind9.7 mph SE
Humidity41%
Visibility—
Dew point69°
Thu, 2099° / 79°0.01
99 °
Highland Park, Thursday, 20 August
Light rain. High 99°, low 79°.
Pressure30.00 inHg
Wind10.9 mph S
Humidity40%
Visibility—
Dew point68°
Fri, 21100° / 79°0
100 °
Highland Park, Friday, 21 August
Overcast. High 100°, low 79°.
Pressure29.91 inHg
Wind9.4 mph SW
Humidity34%
Visibility—
Dew point64°
Sat, 22101° / 81°0.02
101 °
Highland Park, Saturday, 22 August
Light rain. High 101°, low 81°.
Pressure29.88 inHg
Wind9.4 mph SW
Humidity33%
Visibility—
Dew point64°
Sun, 2396° / 76°0.08
96 °
Highland Park, Sunday, 23 August
Light rain. High 96°, low 76°.
Pressure29.97 inHg
Wind8.4 mph SW
Humidity37%
Visibility—
Dew point63°
Mon, 2497° / 77°0.19
97 °
Highland Park, Monday, 24 August
Light rain. High 97°, low 77°.
Pressure30.06 inHg
Wind10.4 mph SW
Humidity37%
Visibility—
Dew point64°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2585° / 73°0.22
85 °
Highland Park, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high85°
Average low73°
Average precipitation0.22 in
Chance of precipitation58%
Record high97° (1968)
Record low65° (1981)
Wed, 2685° / 73°0.16
85 °
Highland Park, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high85°
Average low73°
Average precipitation0.16 in
Chance of precipitation60%
Record high93° (1965)
Record low64° (1994)
Thu, 2786° / 73°0.19
86 °
Highland Park, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high86°
Average low73°
Average precipitation0.19 in
Chance of precipitation60%
Record high95° (2011)
Record low64° (1966)
Fri, 2885° / 73°0.26
85 °
Highland Park, Friday, 28 August
Climate normal for this date — 60-year average.
Average high85°
Average low73°
Average precipitation0.26 in
Chance of precipitation62%
Record high93° (2011)
Record low62° (1968)
Sat, 2985° / 73°0.14
85 °
Highland Park, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high85°
Average low73°
Average precipitation0.14 in
Chance of precipitation48%
Record high93° (1990)
Record low62° (1986)
Sun, 3085° / 73°0.27
85 °
Highland Park, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high85°
Average low73°
Average precipitation0.27 in
Chance of precipitation62%
Record high94° (1998)
Record low63° (1986)
Mon, 3185° / 73°0.23
85 °
Highland Park, Monday, 31 August
Climate normal for this date — 60-year average.
Average high85°
Average low73°
Average precipitation0.23 in
Chance of precipitation53%
Record high92° (1970)
Record low63° (1999)
Tue, 0185° / 72°0.13
85 °
Highland Park, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high85°
Average low72°
Average precipitation0.13 in
Chance of precipitation50%
Record high92° (1970)
Record low61° (1999)
Wed, 0284° / 72°0.17
84 °
Highland Park, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high84°
Average low72°
Average precipitation0.17 in
Chance of precipitation53%
Record high91° (2020)
Record low64° (1967)
Thu, 0385° / 71°0.16
85 °
Highland Park, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high85°
Average low71°
Average precipitation0.16 in
Chance of precipitation38%
Record high97° (2020)
Record low63° (1967)
Fri, 0484° / 72°0.24
84 °
Highland Park, Friday, 4 September
Climate normal for this date — 60-year average.
Average high84°
Average low72°
Average precipitation0.24 in
Chance of precipitation40%
Record high98° (2020)
Record low65° (2023)
Sat, 0584° / 72°0.41
84 °
Highland Park, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high84°
Average low72°
Average precipitation0.41 in
Chance of precipitation55%
Record high93° (2023)
Record low60° (1997)
Sun, 0684° / 71°0.19
84 °
Highland Park, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high84°
Average low71°
Average precipitation0.19 in
Chance of precipitation58%
Record high94° (2023)
Record low59° (1997)
Mon, 0784° / 71°0.13
84 °
Highland Park, Monday, 7 September
Climate normal for this date — 60-year average.
Average high84°
Average low71°
Average precipitation0.13 in
Chance of precipitation45%
Record high95° (2023)
Record low64° (1972)
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 Highland Park, SC 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 Highland Park, SC 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.