Monthly outlook for Union Valley, TN: average high 85.7°, average low 68.1°. That is 0.6° above the climate normal for August. Precipitation is expected on 13 days (about 5.5 inches), against a normal of 7 days and 1.9 inches. The warmest day looks like 12 August (92.6°), the coolest 21 August (59.4°).
85.7°/68.1°
Average high / low
+0.6°
Above normal
13 / 7
Wet days / normal
5.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
86°
84.6°
+0.8°
18 August – 27 August
85.2°
84.7°
+0.3°
28 August – 6 September
at normal
83.6°
—
August records over 66 years
100.8°16 August 2007All-time high
53.8°7 August 2004All-time low
Climate normals and records are computed from the nearest reference point — Knoxville (14 mi).
Sun, 0986° / 71°0.04
86 °
Union Valley, Sunday, 9 August
Light rain. High 86°, low 71°.
Pressure30.12 inHg
Wind2.7 mph W
Humidity55%
Visibility6.2 mi
Dew point68°
Mon, 1086° / 71°0.2
86 °
Union Valley, Monday, 10 August
Rain. High 86°, low 71°.
Pressure30.15 inHg
Wind5.1 mph W
Humidity69%
Visibility6.0 mi
Dew point72°
Tue, 1190° / 69°0.05
90 °
Union Valley, Tuesday, 11 August
Light rain. High 90°, low 69°.
Pressure30.06 inHg
Wind7.6 mph SW
Humidity63%
Visibility6.2 mi
Dew point71°
Wed, 1293° / 70°0.67
93 °
Union Valley, Wednesday, 12 August
Heavy rain. High 93°, low 70°.
Pressure29.94 inHg
Wind12.8 mph W
Humidity58%
Visibility6.2 mi
Dew point70°
Thu, 1386° / 67°0.89
86 °
Union Valley, Thursday, 13 August
Heavy rain. High 86°, low 67°.
Pressure29.97 inHg
Wind4.7 mph W
Humidity59%
Visibility—
Dew point67°
Fri, 1479° / 70°0.96
79 °
Union Valley, Friday, 14 August
Rain. High 79°, low 70°.
Pressure30.09 inHg
Wind5.3 mph SW
Humidity94%
Visibility—
Dew point72°
Sat, 1580° / 70°0.43
80 °
Union Valley, Saturday, 15 August
Rain. High 80°, low 70°.
Pressure30.18 inHg
Wind4.7 mph NE
Humidity79%
Visibility—
Dew point69°
Sun, 1684° / 68°0.11
84 °
Union Valley, Sunday, 16 August
Light rain. High 84°, low 68°.
Pressure30.12 inHg
Wind5.3 mph SW
Humidity71%
Visibility—
Dew point69°
Mon, 1791° / 69°1.4
91 °
Union Valley, Monday, 17 August
Heavy rain. High 91°, low 69°.
Pressure30.03 inHg
Wind9 mph SW
Humidity58%
Visibility—
Dew point70°
Tue, 1887° / 67°0.32
87 °
Union Valley, Tuesday, 18 August
Rain. High 87°, low 67°.
Pressure30.00 inHg
Wind7.3 mph W
Humidity62%
Visibility—
Dew point70°
Wed, 1988° / 69°0.24
88 °
Union Valley, Wednesday, 19 August
Rain. High 88°, low 69°.
Pressure29.91 inHg
Wind3 mph SW
Humidity56%
Visibility—
Dew point67°
Thu, 2083° / 65°0.01
83 °
Union Valley, Thursday, 20 August
Light rain. High 83°, low 65°.
Pressure29.88 inHg
Wind6.4 mph NW
Humidity68%
Visibility—
Dew point68°
Fri, 2180° / 59°0
80 °
Union Valley, Friday, 21 August
Overcast. High 80°, low 59°.
Pressure30.00 inHg
Wind4.8 mph E
Humidity52%
Visibility—
Dew point58°
Sat, 2284° / 64°0.11
84 °
Union Valley, Saturday, 22 August
Light rain. High 84°, low 64°.
Pressure30.03 inHg
Wind5.3 mph SW
Humidity63%
Visibility—
Dew point66°
Sun, 2390° / 70°0
90 °
Union Valley, Sunday, 23 August
Overcast. High 90°, low 70°.
Pressure30.06 inHg
Wind8.2 mph W
Humidity56%
Visibility—
Dew point68°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2485° / 67°0.09
85 °
Union Valley, Monday, 24 August
Climate normal for this date — 60-year average.
Average high85°
Average low67°
Average precipitation0.09 in
Chance of precipitation28%
Record high97° (2007)
Record low55° (1997)
Tue, 2585° / 67°0.07
85 °
Union Valley, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high85°
Average low67°
Average precipitation0.07 in
Chance of precipitation30%
Record high98° (2023)
Record low56° (2015)
Wed, 2685° / 67°0.12
85 °
Union Valley, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high85°
Average low67°
Average precipitation0.12 in
Chance of precipitation30%
Record high95° (2016)
Record low56° (1966)
Thu, 2785° / 67°0.09
85 °
Union Valley, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high85°
Average low67°
Average precipitation0.09 in
Chance of precipitation28%
Record high94° (2016)
Record low58° (2025)
Fri, 2885° / 67°0.07
85 °
Union Valley, Friday, 28 August
Climate normal for this date — 60-year average.
Average high85°
Average low67°
Average precipitation0.07 in
Chance of precipitation27%
Record high95° (1990)
Record low56° (1968)
Sat, 2985° / 67°0.06
85 °
Union Valley, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high85°
Average low67°
Average precipitation0.06 in
Chance of precipitation23%
Record high95° (2024)
Record low54° (1986)
Sun, 3084° / 67°0.08
84 °
Union Valley, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high84°
Average low67°
Average precipitation0.08 in
Chance of precipitation38%
Record high96° (2024)
Record low54° (1965)
Mon, 3184° / 67°0.11
84 °
Union Valley, Monday, 31 August
Climate normal for this date — 60-year average.
Average high84°
Average low67°
Average precipitation0.11 in
Chance of precipitation38%
Record high92° (2019)
Record low56° (1968)
Tue, 0183° / 67°0.14
83 °
Union Valley, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.14 in
Chance of precipitation42%
Record high93° (1993)
Record low57° (1967)
Wed, 0284° / 66°0.11
84 °
Union Valley, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high84°
Average low66°
Average precipitation0.11 in
Chance of precipitation33%
Record high95° (2011)
Record low54° (1967)
Thu, 0383° / 66°0.12
83 °
Union Valley, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.12 in
Chance of precipitation45%
Record high95° (2011)
Record low54° (1967)
Fri, 0483° / 65°0.09
83 °
Union Valley, Friday, 4 September
Climate normal for this date — 60-year average.
Average high83°
Average low65°
Average precipitation0.09 in
Chance of precipitation37%
Record high97° (2019)
Record low56° (1967)
Sat, 0582° / 65°0.15
82 °
Union Valley, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.15 in
Chance of precipitation28%
Record high95° (1975)
Record low52° (1997)
Sun, 0682° / 65°0.09
82 °
Union Valley, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.09 in
Chance of precipitation35%
Record high93° (1990)
Record low52° (1984)
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 Union Valley, 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 Union Valley, 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.