Monthly outlook for Clarksville, IL: average high 78.6°, average low 62.8°. That is 1.4° below the climate normal for August. Precipitation is expected on 4 days (about 0.6 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 9 August (91.5°), the coolest 21 August (50.8°).
78.6°/62.8°
Average high / low
−1.4°
Below normal
4 / 5
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
79.9°
81.1°
-0.7°
18 August – 27 August
76.5°
81.4°
-2.7°
28 August – 6 September
at normal
80°
—
August records over 66 years
97°17 August 1988All-time high
45.1°29 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Bloomington (14 mi).
Sun, 0991° / 68°0
91 °
Clarksville, Sunday, 9 August
Clear. High 91°, low 68°.
Pressure29.94 inHg
Wind14.9 mph S
Humidity76%
Visibility6.2 mi
Dew point75°
Mon, 1090° / 74°0
90 °
Clarksville, Monday, 10 August
Light rain. High 90°, low 74°.
Pressure29.91 inHg
Wind10.2 mph SW
Humidity72%
Visibility6.2 mi
Dew point74°
Tue, 1186° / 70°0.17
86 °
Clarksville, Tuesday, 11 August
Rain. High 86°, low 70°.
Pressure29.83 inHg
Wind9.1 mph SW
Humidity79%
Visibility6.2 mi
Dew point71°
Wed, 1282° / 71°0.04
82 °
Clarksville, Wednesday, 12 August
Light rain. High 82°, low 71°.
Pressure29.85 inHg
Wind0.7 mph NE
Humidity76%
Visibility6.2 mi
Dew point73°
Thu, 1377° / 62°0.13
77 °
Clarksville, Thursday, 13 August
Light rain. High 77°, low 62°.
Pressure29.97 inHg
Wind13.3 mph NE
Humidity71%
Visibility—
Dew point65°
Fri, 1476° / 60°0
76 °
Clarksville, Friday, 14 August
Partly cloudy. High 76°, low 60°.
Pressure30.09 inHg
Wind7.9 mph NE
Humidity69%
Visibility—
Dew point63°
Sat, 1565° / 60°0.1
65 °
Clarksville, Saturday, 15 August
Light rain. High 65°, low 60°.
Pressure30.27 inHg
Wind8.9 mph E
Humidity93%
Visibility—
Dew point58°
Sun, 1670° / 59°0.01
70 °
Clarksville, Sunday, 16 August
Light rain. High 70°, low 59°.
Pressure30.15 inHg
Wind7.1 mph SE
Humidity85%
Visibility—
Dew point60°
Mon, 1777° / 61°0.02
77 °
Clarksville, Monday, 17 August
Light rain. High 77°, low 61°.
Pressure30.06 inHg
Wind5.1 mph NE
Humidity77%
Visibility—
Dew point64°
Tue, 1881° / 64°0
81 °
Clarksville, Tuesday, 18 August
Overcast. High 81°, low 64°.
Pressure30.00 inHg
Wind7.6 mph S
Humidity70%
Visibility—
Dew point67°
Wed, 1974° / 60°0.07
74 °
Clarksville, Wednesday, 19 August
Light rain. High 74°, low 60°.
Pressure29.91 inHg
Wind12.4 mph N
Humidity88%
Visibility—
Dew point66°
Thu, 2070° / 53°0.02
70 °
Clarksville, Thursday, 20 August
Light rain. High 70°, low 53°.
Pressure30.06 inHg
Wind12.1 mph N
Humidity63%
Visibility—
Dew point54°
Fri, 2172° / 51°0
72 °
Clarksville, Friday, 21 August
Overcast. High 72°, low 51°.
Pressure30.06 inHg
Wind8.1 mph E
Humidity62%
Visibility—
Dew point55°
Sat, 2278° / 57°0.02
78 °
Clarksville, Saturday, 22 August
Light rain. High 78°, low 57°.
Pressure29.85 inHg
Wind13.7 mph SE
Humidity75%
Visibility—
Dew point64°
Sun, 2384° / 66°0
84 °
Clarksville, Sunday, 23 August
Partly cloudy. High 84°, low 66°.
Pressure29.94 inHg
Wind11.7 mph W
Humidity57%
Visibility—
Dew point65°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2481° / 65°0.1
81 °
Clarksville, Monday, 24 August
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.1 in
Chance of precipitation30%
Record high95° (2023)
Record low53° (1966)
Tue, 2582° / 65°0.12
82 °
Clarksville, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.12 in
Chance of precipitation30%
Record high92° (2014)
Record low55° (1966)
Wed, 2682° / 66°0.13
82 °
Clarksville, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.13 in
Chance of precipitation37%
Record high92° (2003)
Record low53° (1964)
Thu, 2782° / 66°0.09
82 °
Clarksville, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.09 in
Chance of precipitation25%
Record high94° (2024)
Record low52° (1968)
Fri, 2882° / 65°0.12
82 °
Clarksville, Friday, 28 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.12 in
Chance of precipitation28%
Record high93° (2013)
Record low48° (1986)
Sat, 2981° / 65°0.13
81 °
Clarksville, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.13 in
Chance of precipitation33%
Record high94° (1984)
Record low45° (1986)
Sun, 3080° / 64°0.08
80 °
Clarksville, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.08 in
Chance of precipitation27%
Record high94° (2013)
Record low50° (1986)
Mon, 3180° / 64°0.08
80 °
Clarksville, Monday, 31 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.08 in
Chance of precipitation30%
Record high93° (2011)
Record low50° (2009)
Tue, 0180° / 64°0.15
80 °
Clarksville, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.15 in
Chance of precipitation25%
Record high99° (2011)
Record low49° (1967)
Wed, 0280° / 64°0.07
80 °
Clarksville, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.07 in
Chance of precipitation22%
Record high97° (2011)
Record low49° (2017)
Thu, 0380° / 64°0.07
80 °
Clarksville, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.07 in
Chance of precipitation25%
Record high94° (2011)
Record low47° (1974)
Fri, 0479° / 62°0.11
79 °
Clarksville, Friday, 4 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.11 in
Chance of precipitation30%
Record high92° (1960)
Record low46° (1974)
Sat, 0579° / 62°0.04
79 °
Clarksville, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.04 in
Chance of precipitation23%
Record high91° (1990)
Record low50° (1997)
Sun, 0679° / 62°0.09
79 °
Clarksville, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.09 in
Chance of precipitation30%
Record high93° (1960)
Record low46° (1962)
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 Clarksville, IL 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 Clarksville, IL 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.