Monthly outlook for Williamston, SC: average high 92.9°, average low 71.9°. That is 3.8° above the climate normal for August. Precipitation is expected on 4 days (about 0.7 inches), against a normal of 7 days and 2.2 inches. The warmest day looks like 10 August (98.6°), the coolest 15 August (69.3°).
92.9°/71.9°
Average high / low
+3.8°
Above normal
4 / 7
Wet days / normal
0.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
92.3°
85.9°
+3.5°
18 August – 27 August
93.9°
86°
+4.4°
28 August – 6 September
at normal
84.1°
—
August records over 66 years
102.4°3 August 2011All-time high
56.1°8 August 2004All-time low
Climate normals and records are computed from the nearest reference point — Mauldin (15 mi).
Sun, 0986° / 71°0
86 °
Williamston, Sunday, 9 August
Clear. High 86°, low 71°.
Pressure30.09 inHg
Wind6.5 mph SW
Humidity45%
Visibility6.2 mi
Dew point66°
Mon, 1099° / 72°0.19
99 °
Williamston, Monday, 10 August
Rain. High 99°, low 72°.
Pressure30.12 inHg
Wind7.5 mph W
Humidity42%
Visibility6.2 mi
Dew point66°
Tue, 1198° / 71°0.02
98 °
Williamston, Tuesday, 11 August
Light rain. High 98°, low 71°.
Pressure30.06 inHg
Wind7.3 mph W
Humidity41%
Visibility6.2 mi
Dew point66°
Wed, 1298° / 74°0
98 °
Williamston, Wednesday, 12 August
Partly cloudy. High 98°, low 74°.
Pressure29.94 inHg
Wind11.7 mph W
Humidity41%
Visibility6.2 mi
Dew point66°
Thu, 1398° / 72°0.01
98 °
Williamston, Thursday, 13 August
Light rain. High 98°, low 72°.
Pressure29.88 inHg
Wind16 mph W
Humidity33%
Visibility—
Dew point60°
Fri, 1489° / 71°0.14
89 °
Williamston, Friday, 14 August
Rain. High 89°, low 71°.
Pressure30.03 inHg
Wind16 mph W
Humidity93%
Visibility—
Dew point72°
Sat, 1588° / 69°0
88 °
Williamston, Saturday, 15 August
Overcast. High 88°, low 69°.
Pressure30.18 inHg
Wind9.7 mph NE
Humidity48%
Visibility—
Dew point60°
Sun, 1688° / 71°0
88 °
Williamston, Sunday, 16 August
Overcast. High 88°, low 71°.
Pressure30.24 inHg
Wind6.6 mph E
Humidity47%
Visibility—
Dew point61°
Mon, 1790° / 70°0
90 °
Williamston, Monday, 17 August
Overcast. High 90°, low 70°.
Pressure30.15 inHg
Wind7.3 mph S
Humidity40%
Visibility—
Dew point60°
Tue, 1885° / 72°0.26
85 °
Williamston, Tuesday, 18 August
Light rain. High 85°, low 72°.
Pressure30.03 inHg
Wind11.5 mph SW
Humidity68%
Visibility—
Dew point71°
Wed, 1996° / 71°0.07
96 °
Williamston, Wednesday, 19 August
Light rain. High 96°, low 71°.
Pressure29.88 inHg
Wind8.1 mph SE
Humidity40%
Visibility—
Dew point64°
Thu, 2097° / 74°0
97 °
Williamston, Thursday, 20 August
Overcast. High 97°, low 74°.
Pressure29.88 inHg
Wind9.7 mph SW
Humidity36%
Visibility—
Dew point63°
Fri, 2197° / 77°0
97 °
Williamston, Friday, 21 August
Overcast. High 97°, low 77°.
Pressure29.83 inHg
Wind15.8 mph W
Humidity34%
Visibility—
Dew point62°
Sat, 2298° / 73°0.02
98 °
Williamston, Saturday, 22 August
Light rain. High 98°, low 73°.
Pressure29.80 inHg
Wind15.5 mph NW
Humidity36%
Visibility—
Dew point63°
Sun, 2390° / 71°0.01
90 °
Williamston, Sunday, 23 August
Light rain. High 90°, low 71°.
Pressure29.91 inHg
Wind13.2 mph NE
Humidity38%
Visibility—
Dew point59°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2485° / 69°0.11
85 °
Williamston, Monday, 24 August
Climate normal for this date — 60-year average.
Average high85°
Average low69°
Average precipitation0.11 in
Chance of precipitation37%
Record high98° (2002)
Record low58° (1969)
Tue, 2585° / 68°0.1
85 °
Williamston, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high85°
Average low68°
Average precipitation0.1 in
Chance of precipitation32%
Record high96° (1968)
Record low57° (1969)
Wed, 2685° / 68°0.17
85 °
Williamston, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high85°
Average low68°
Average precipitation0.17 in
Chance of precipitation30%
Record high97° (1998)
Record low57° (2013)
Thu, 2786° / 68°0.1
86 °
Williamston, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high86°
Average low68°
Average precipitation0.1 in
Chance of precipitation42%
Record high95° (1998)
Record low56° (1966)
Fri, 2886° / 68°0.07
86 °
Williamston, Friday, 28 August
Climate normal for this date — 60-year average.
Average high86°
Average low68°
Average precipitation0.07 in
Chance of precipitation25%
Record high94° (2024)
Record low59° (1966)
Sat, 2986° / 68°0.04
86 °
Williamston, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high86°
Average low68°
Average precipitation0.04 in
Chance of precipitation28%
Record high96° (2024)
Record low56° (1969)
Sun, 3085° / 68°0.11
85 °
Williamston, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high85°
Average low68°
Average precipitation0.11 in
Chance of precipitation38%
Record high94° (2024)
Record low56° (1965)
Mon, 3184° / 68°0.13
84 °
Williamston, Monday, 31 August
Climate normal for this date — 60-year average.
Average high84°
Average low68°
Average precipitation0.13 in
Chance of precipitation47%
Record high93° (1993)
Record low58° (1999)
Tue, 0184° / 67°0.08
84 °
Williamston, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high84°
Average low67°
Average precipitation0.08 in
Chance of precipitation40%
Record high93° (2016)
Record low55° (1999)
Wed, 0284° / 67°0.11
84 °
Williamston, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high84°
Average low67°
Average precipitation0.11 in
Chance of precipitation37%
Record high97° (2011)
Record low55° (1967)
Thu, 0384° / 66°0.15
84 °
Williamston, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high84°
Average low66°
Average precipitation0.15 in
Chance of precipitation43%
Record high93° (2015)
Record low52° (1967)
Fri, 0483° / 67°0.14
83 °
Williamston, Friday, 4 September
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.14 in
Chance of precipitation42%
Record high95° (1975)
Record low56° (1994)
Sat, 0583° / 66°0.17
83 °
Williamston, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.17 in
Chance of precipitation32%
Record high93° (1975)
Record low53° (1997)
Sun, 0683° / 66°0.11
83 °
Williamston, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.11 in
Chance of precipitation30%
Record high94° (2023)
Record low55° (1982)
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 Williamston, 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 Williamston, 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.