Monthly outlook for Indianola, IL: average high 80.4°, average low 64.1°. That is 1.2° below the climate normal for August. Precipitation is expected on 6 days (about 0.9 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 9 August (92°), the coolest 21 August (53.4°).
80.4°/64.1°
Average high / low
−1.2°
Below normal
6 / 5
Wet days / normal
0.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
80.8°
82.5°
-0.9°
19 August – 28 August
79.8°
82.8°
-1.7°
29 August – 7 September
at normal
81.2°
—
August records over 66 years
100.9°16 August 1988All-time high
45.9°29 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Dana (15 mi).
Mon, 1090° / 77°0.02
90 °
Indianola, Monday, 10 August
Light rain. High 90°, low 77°.
Pressure29.94 inHg
Wind11.8 mph SW
Humidity65%
Visibility6.2 mi
Dew point74°
Tue, 1188° / 73°0.07
88 °
Indianola, Tuesday, 11 August
Light rain. High 88°, low 73°.
Pressure29.88 inHg
Wind12.1 mph SW
Humidity69%
Visibility6.2 mi
Dew point73°
Wed, 1282° / 71°0.15
82 °
Indianola, Wednesday, 12 August
Light rain. High 82°, low 71°.
Pressure29.85 inHg
Wind3.4 mph NW
Humidity79%
Visibility6.2 mi
Dew point73°
Thu, 1380° / 66°0.2
80 °
Indianola, Thursday, 13 August
Rain. High 80°, low 66°.
Pressure29.97 inHg
Wind9.3 mph E
Humidity62%
Visibility—
Dew point64°
Fri, 1477° / 62°0.09
77 °
Indianola, Friday, 14 August
Light rain. High 77°, low 62°.
Pressure30.09 inHg
Wind8.6 mph E
Humidity66%
Visibility—
Dew point63°
Sat, 1566° / 58°0.28
66 °
Indianola, Saturday, 15 August
Rain. High 66°, low 58°.
Pressure30.27 inHg
Wind10.5 mph E
Humidity96%
Visibility—
Dew point62°
Sun, 1675° / 59°0.02
75 °
Indianola, Sunday, 16 August
Light rain. High 75°, low 59°.
Pressure30.12 inHg
Wind7.3 mph E
Humidity74%
Visibility—
Dew point61°
Mon, 1775° / 64°0.08
75 °
Indianola, Monday, 17 August
Light rain. High 75°, low 64°.
Pressure30.06 inHg
Wind6.5 mph N
Humidity87%
Visibility—
Dew point67°
Tue, 1882° / 64°0
82 °
Indianola, Tuesday, 18 August
Overcast. High 82°, low 64°.
Pressure30.00 inHg
Wind4.2 mph S
Humidity67%
Visibility—
Dew point67°
Wed, 1982° / 62°0
82 °
Indianola, Wednesday, 19 August
Overcast. High 82°, low 62°.
Pressure29.91 inHg
Wind12 mph N
Humidity75%
Visibility—
Dew point72°
Thu, 2074° / 54°0
74 °
Indianola, Thursday, 20 August
Partly cloudy. High 74°, low 54°.
Pressure30.03 inHg
Wind14.2 mph N
Humidity61%
Visibility—
Dew point56°
Fri, 2172° / 53°0
72 °
Indianola, Friday, 21 August
Overcast. High 72°, low 53°.
Pressure30.06 inHg
Wind9.2 mph E
Humidity56%
Visibility—
Dew point53°
Sat, 2278° / 58°0.02
78 °
Indianola, Saturday, 22 August
Light rain. High 78°, low 58°.
Pressure29.88 inHg
Wind12.5 mph S
Humidity66%
Visibility—
Dew point63°
Sun, 2387° / 67°0
87 °
Indianola, Sunday, 23 August
Clear. High 87°, low 67°.
Pressure29.94 inHg
Wind10.1 mph W
Humidity54%
Visibility—
Dew point65°
Mon, 2485° / 65°0
85 °
Indianola, Monday, 24 August
Overcast. High 85°, low 65°.
Pressure30.00 inHg
Wind5.4 mph E
Humidity57%
Visibility—
Dew point66°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2583° / 65°0.07
83 °
Indianola, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high83°
Average low65°
Average precipitation0.07 in
Chance of precipitation27%
Record high93° (2023)
Record low55° (1984)
Wed, 2683° / 66°0.09
83 °
Indianola, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.09 in
Chance of precipitation38%
Record high93° (2024)
Record low52° (2025)
Thu, 2783° / 67°0.13
83 °
Indianola, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.13 in
Chance of precipitation33%
Record high96° (2024)
Record low51° (2025)
Fri, 2883° / 66°0.16
83 °
Indianola, Friday, 28 August
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.16 in
Chance of precipitation27%
Record high93° (2013)
Record low51° (1986)
Sat, 2983° / 65°0.09
83 °
Indianola, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high83°
Average low65°
Average precipitation0.09 in
Chance of precipitation30%
Record high94° (2007)
Record low46° (1986)
Sun, 3081° / 65°0.1
81 °
Indianola, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.1 in
Chance of precipitation23%
Record high93° (1995)
Record low49° (1986)
Mon, 3182° / 64°0.06
82 °
Indianola, Monday, 31 August
Climate normal for this date — 60-year average.
Average high82°
Average low64°
Average precipitation0.06 in
Chance of precipitation17%
Record high95° (2013)
Record low52° (2009)
Tue, 0182° / 64°0.11
82 °
Indianola, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high82°
Average low64°
Average precipitation0.11 in
Chance of precipitation22%
Record high100° (2011)
Record low49° (1967)
Wed, 0282° / 64°0.11
82 °
Indianola, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high82°
Average low64°
Average precipitation0.11 in
Chance of precipitation35%
Record high100° (2011)
Record low50° (1967)
Thu, 0381° / 64°0.11
81 °
Indianola, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.11 in
Chance of precipitation25%
Record high98° (2011)
Record low49° (1974)
Fri, 0481° / 63°0.07
81 °
Indianola, Friday, 4 September
Climate normal for this date — 60-year average.
Average high81°
Average low63°
Average precipitation0.07 in
Chance of precipitation18%
Record high95° (2007)
Record low47° (1974)
Sat, 0581° / 63°0.05
81 °
Indianola, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high81°
Average low63°
Average precipitation0.05 in
Chance of precipitation18%
Record high95° (2007)
Record low49° (1997)
Sun, 0680° / 63°0.06
80 °
Indianola, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.06 in
Chance of precipitation22%
Record high92° (1998)
Record low49° (1988)
Mon, 0780° / 62°0.08
80 °
Indianola, Monday, 7 September
Climate normal for this date — 60-year average.
Average high80°
Average low62°
Average precipitation0.08 in
Chance of precipitation28%
Record high92° (1960)
Record low47° (1988)
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 Indianola, 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 Indianola, 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.