Monthly outlook for Southside, TN: average high 85.3°, average low 70.1°. That is 1.1° below the climate normal for August. Precipitation is expected on 9 days (about 2.4 inches), against a normal of 6 days and 1.7 inches. The warmest day looks like 11 August (93.9°), the coolest 15 August (59.1°).
85.3°/70.1°
Average high / low
−1.1°
Below normal
9 / 6
Wet days / normal
2.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
84.9°
87.3°
-1.3°
18 August – 27 August
86°
87.5°
-0.8°
28 August – 6 September
at normal
85.5°
—
August records over 66 years
105.6°15 August 2007All-time high
53.4°29 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Clarksville (14 mi).
Sun, 0988° / 73°0
88 °
Southside, Sunday, 9 August
Overcast. High 88°, low 73°.
Pressure30.09 inHg
Wind8.5 mph SW
Humidity63%
Visibility6.2 mi
Dew point71°
Mon, 1093° / 75°0.02
93 °
Southside, Monday, 10 August
Light rain. High 93°, low 75°.
Pressure30.09 inHg
Wind8.6 mph SW
Humidity56%
Visibility6.2 mi
Dew point71°
Tue, 1194° / 73°0.02
94 °
Southside, Tuesday, 11 August
Light rain. High 94°, low 73°.
Pressure30.00 inHg
Wind10.6 mph SW
Humidity56%
Visibility6.2 mi
Dew point72°
Wed, 1279° / 72°0.48
79 °
Southside, Wednesday, 12 August
Rain. High 79°, low 72°.
Pressure29.94 inHg
Wind9.1 mph SW
Humidity93%
Visibility4.0 mi
Dew point70°
Thu, 1386° / 71°0.37
86 °
Southside, Thursday, 13 August
Rain. High 86°, low 71°.
Pressure29.91 inHg
Wind7.9 mph SW
Humidity64%
Visibility—
Dew point70°
Fri, 1477° / 71°0.43
77 °
Southside, Friday, 14 August
Rain. High 77°, low 71°.
Pressure30.06 inHg
Wind12.2 mph SW
Humidity96%
Visibility—
Dew point71°
Sat, 1579° / 59°0
79 °
Southside, Saturday, 15 August
Overcast. High 79°, low 59°.
Pressure30.24 inHg
Wind6.6 mph NE
Humidity54%
Visibility—
Dew point58°
Sun, 1683° / 59°0
83 °
Southside, Sunday, 16 August
Overcast. High 83°, low 59°.
Pressure30.21 inHg
Wind4.6 mph E
Humidity46%
Visibility—
Dew point57°
Mon, 1781° / 69°0.06
81 °
Southside, Monday, 17 August
Light rain. High 81°, low 69°.
Pressure30.12 inHg
Wind9.4 mph SW
Humidity97%
Visibility—
Dew point71°
Tue, 1891° / 70°0.34
91 °
Southside, Tuesday, 18 August
Light rain. High 91°, low 70°.
Pressure29.94 inHg
Wind10.3 mph SW
Humidity64%
Visibility—
Dew point72°
Wed, 1991° / 73°0.01
91 °
Southside, Wednesday, 19 August
Light rain. High 91°, low 73°.
Pressure29.94 inHg
Wind4.7 mph SE
Humidity57%
Visibility—
Dew point70°
Thu, 2086° / 74°0.15
86 °
Southside, Thursday, 20 August
Light rain. High 86°, low 74°.
Pressure29.88 inHg
Wind7.2 mph W
Humidity77%
Visibility—
Dew point72°
Fri, 2185° / 71°0.25
85 °
Southside, Friday, 21 August
Light rain. High 85°, low 71°.
Pressure29.88 inHg
Wind5.1 mph N
Humidity81%
Visibility—
Dew point74°
Sat, 2283° / 71°0.13
83 °
Southside, Saturday, 22 August
Light rain. High 83°, low 71°.
Pressure29.91 inHg
Wind5.6 mph NE
Humidity77%
Visibility—
Dew point73°
Sun, 2380° / 67°0
80 °
Southside, Sunday, 23 August
Overcast. High 80°, low 67°.
Pressure30.00 inHg
Wind11.4 mph NE
Humidity65%
Visibility—
Dew point66°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2487° / 69°0.09
87 °
Southside, Monday, 24 August
Climate normal for this date — 60-year average.
Average high87°
Average low69°
Average precipitation0.09 in
Chance of precipitation25%
Record high100° (2007)
Record low58° (1966)
Tue, 2588° / 69°0.07
88 °
Southside, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high88°
Average low69°
Average precipitation0.07 in
Chance of precipitation23%
Record high100° (2023)
Record low59° (1966)
Wed, 2688° / 70°0.08
88 °
Southside, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high88°
Average low70°
Average precipitation0.08 in
Chance of precipitation33%
Record high96° (2023)
Record low56° (2025)
Thu, 2788° / 70°0.09
88 °
Southside, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high88°
Average low70°
Average precipitation0.09 in
Chance of precipitation27%
Record high97° (1990)
Record low55° (2025)
Fri, 2887° / 69°0.08
87 °
Southside, Friday, 28 August
Climate normal for this date — 60-year average.
Average high87°
Average low69°
Average precipitation0.08 in
Chance of precipitation28%
Record high100° (1990)
Record low58° (1968)
Sat, 2987° / 70°0.12
87 °
Southside, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high87°
Average low70°
Average precipitation0.12 in
Chance of precipitation43%
Record high98° (2024)
Record low53° (1986)
Sun, 3086° / 69°0.15
86 °
Southside, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high86°
Average low69°
Average precipitation0.15 in
Chance of precipitation32%
Record high97° (2024)
Record low58° (1988)
Mon, 3186° / 69°0.2
86 °
Southside, Monday, 31 August
Climate normal for this date — 60-year average.
Average high86°
Average low69°
Average precipitation0.2 in
Chance of precipitation42%
Record high96° (2011)
Record low58° (1988)
Tue, 0186° / 69°0.16
86 °
Southside, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high86°
Average low69°
Average precipitation0.16 in
Chance of precipitation40%
Record high97° (2011)
Record low55° (1967)
Wed, 0286° / 69°0.12
86 °
Southside, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high86°
Average low69°
Average precipitation0.12 in
Chance of precipitation37%
Record high99° (2011)
Record low55° (1967)
Thu, 0385° / 68°0.12
85 °
Southside, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high85°
Average low68°
Average precipitation0.12 in
Chance of precipitation38%
Record high100° (2011)
Record low56° (2017)
Fri, 0484° / 68°0.07
84 °
Southside, Friday, 4 September
Climate normal for this date — 60-year average.
Average high84°
Average low68°
Average precipitation0.07 in
Chance of precipitation25%
Record high98° (1999)
Record low52° (1974)
Sat, 0584° / 67°0.12
84 °
Southside, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high84°
Average low67°
Average precipitation0.12 in
Chance of precipitation30%
Record high99° (1999)
Record low54° (1997)
Sun, 0685° / 66°0.07
85 °
Southside, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high85°
Average low66°
Average precipitation0.07 in
Chance of precipitation27%
Record high98° (1990)
Record low54° (2011)
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 Southside, TN 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 Southside, TN 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.