Monthly outlook for Walnut Grove, SC: average high 90.9°, average low 69.4°. That is 2.5° above the climate normal for August. Precipitation is expected on 10 days (about 2.1 inches), against a normal of 7 days and 2.0 inches. The warmest day looks like 23 August (98.1°), the coolest 21 August (64.2°).
90.9°/69.4°
Average high / low
+2.5°
Above normal
10 / 7
Wet days / normal
2.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
90.4°
86.2°
+2.3°
18 August – 27 August
91.7°
86.3°
+3°
28 August – 6 September
at normal
84.5°
—
August records over 66 years
103.1°17 August 2007All-time high
55.9°30 August 1965All-time low
Climate normals and records are computed from the nearest reference point — Spartanburg (10 mi).
Sun, 0990° / 72°0
90 °
Walnut Grove, Sunday, 9 August
Light rain. High 90°, low 72°.
Pressure30.09 inHg
Wind5.6 mph SW
Humidity47%
Visibility6.2 mi
Dew point68°
Mon, 1096° / 71°0.15
96 °
Walnut Grove, Monday, 10 August
Rain. High 96°, low 71°.
Pressure30.09 inHg
Wind8.4 mph W
Humidity39%
Visibility6.2 mi
Dew point65°
Tue, 1197° / 69°0.03
97 °
Walnut Grove, Tuesday, 11 August
Light rain. High 97°, low 69°.
Pressure30.03 inHg
Wind5.4 mph W
Humidity42%
Visibility6.2 mi
Dew point65°
Wed, 1297° / 72°0.11
97 °
Walnut Grove, Wednesday, 12 August
Light rain. High 97°, low 72°.
Pressure29.91 inHg
Wind10.1 mph W
Humidity40%
Visibility6.2 mi
Dew point66°
Thu, 1396° / 71°0.04
96 °
Walnut Grove, Thursday, 13 August
Light rain. High 96°, low 71°.
Pressure29.91 inHg
Wind6.2 mph W
Humidity37%
Visibility—
Dew point61°
Fri, 1484° / 72°0.15
84 °
Walnut Grove, Friday, 14 August
Light rain. High 84°, low 72°.
Pressure30.09 inHg
Wind6.2 mph NW
Humidity73%
Visibility—
Dew point68°
Sat, 1575° / 68°0.18
75 °
Walnut Grove, Saturday, 15 August
Rain. High 75°, low 68°.
Pressure30.21 inHg
Wind8 mph NE
Humidity82%
Visibility—
Dew point67°
Sun, 1686° / 65°0.01
86 °
Walnut Grove, Sunday, 16 August
Light rain. High 86°, low 65°.
Pressure30.18 inHg
Wind5.3 mph E
Humidity53%
Visibility—
Dew point60°
Mon, 1792° / 67°0.84
92 °
Walnut Grove, Monday, 17 August
Rain. High 92°, low 67°.
Pressure30.06 inHg
Wind8.5 mph S
Humidity77%
Visibility—
Dew point72°
Tue, 1893° / 69°0.07
93 °
Walnut Grove, Tuesday, 18 August
Light rain. High 93°, low 69°.
Pressure29.94 inHg
Wind5.7 mph SW
Humidity46%
Visibility—
Dew point66°
Wed, 1991° / 71°0.45
91 °
Walnut Grove, Wednesday, 19 August
Rain. High 91°, low 71°.
Pressure29.88 inHg
Wind5.3 mph N
Humidity52%
Visibility—
Dew point67°
Thu, 2096° / 71°0
96 °
Walnut Grove, Thursday, 20 August
Mostly clear. High 96°, low 71°.
Pressure29.77 inHg
Wind14.5 mph N
Humidity34%
Visibility—
Dew point60°
Fri, 2187° / 64°0
87 °
Walnut Grove, Friday, 21 August
Overcast. High 87°, low 64°.
Pressure29.94 inHg
Wind6.2 mph NE
Humidity39%
Visibility—
Dew point55°
Sat, 2285° / 67°0.05
85 °
Walnut Grove, Saturday, 22 August
Light rain. High 85°, low 67°.
Pressure30.03 inHg
Wind4.2 mph NE
Humidity46%
Visibility—
Dew point60°
Sun, 2398° / 69°0.06
98 °
Walnut Grove, Sunday, 23 August
Light rain. High 98°, low 69°.
Pressure30.00 inHg
Wind9.1 mph SW
Humidity38%
Visibility—
Dew point64°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2485° / 69°0.1
85 °
Walnut Grove, Monday, 24 August
Climate normal for this date — 60-year average.
Average high85°
Average low69°
Average precipitation0.1 in
Chance of precipitation32%
Record high99° (2002)
Record low59° (2018)
Tue, 2585° / 68°0.11
85 °
Walnut Grove, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high85°
Average low68°
Average precipitation0.11 in
Chance of precipitation33%
Record high96° (1998)
Record low59° (1969)
Wed, 2685° / 68°0.15
85 °
Walnut Grove, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high85°
Average low68°
Average precipitation0.15 in
Chance of precipitation25%
Record high97° (1998)
Record low58° (2013)
Thu, 2787° / 69°0.11
87 °
Walnut Grove, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high87°
Average low69°
Average precipitation0.11 in
Chance of precipitation35%
Record high96° (1987)
Record low57° (1966)
Fri, 2886° / 69°0.06
86 °
Walnut Grove, Friday, 28 August
Climate normal for this date — 60-year average.
Average high86°
Average low69°
Average precipitation0.06 in
Chance of precipitation27%
Record high95° (1987)
Record low60° (1966)
Sat, 2986° / 69°0.04
86 °
Walnut Grove, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high86°
Average low69°
Average precipitation0.04 in
Chance of precipitation27%
Record high96° (1998)
Record low58° (1968)
Sun, 3085° / 69°0.09
85 °
Walnut Grove, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high85°
Average low69°
Average precipitation0.09 in
Chance of precipitation37%
Record high94° (2024)
Record low56° (1965)
Mon, 3184° / 68°0.12
84 °
Walnut Grove, Monday, 31 August
Climate normal for this date — 60-year average.
Average high84°
Average low68°
Average precipitation0.12 in
Chance of precipitation43%
Record high94° (1993)
Record low60° (1999)
Tue, 0184° / 68°0.09
84 °
Walnut Grove, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high84°
Average low68°
Average precipitation0.09 in
Chance of precipitation43%
Record high94° (2014)
Record low57° (1999)
Wed, 0284° / 67°0.09
84 °
Walnut Grove, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high84°
Average low67°
Average precipitation0.09 in
Chance of precipitation33%
Record high97° (2011)
Record low55° (1967)
Thu, 0385° / 67°0.13
85 °
Walnut Grove, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high85°
Average low67°
Average precipitation0.13 in
Chance of precipitation42%
Record high94° (2015)
Record low53° (1967)
Fri, 0483° / 67°0.12
83 °
Walnut Grove, Friday, 4 September
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.12 in
Chance of precipitation38%
Record high95° (1975)
Record low57° (1995)
Sat, 0583° / 67°0.18
83 °
Walnut Grove, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.18 in
Chance of precipitation35%
Record high94° (1975)
Record low55° (1997)
Sun, 0684° / 67°0.11
84 °
Walnut Grove, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high84°
Average low67°
Average precipitation0.11 in
Chance of precipitation32%
Record high95° (2023)
Record low57° (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 Walnut Grove, 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 Walnut Grove, 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.