Monthly outlook for Pleasant Hill, IL: average high 98.2°, average low 72.5°. That is 7.2° above the climate normal for August. Precipitation is expected on 7 days (about 1.1 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 20 August (115.7°), the coolest 14 August (63.8°).
98.2°/72.5°
Average high / low
+7.2°
Above normal
7 / 5
Wet days / normal
1.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
91.4°
85.3°
+3.4°
19 August – 28 August
109.6°
85.4°
+13.5°
29 August – 7 September
at normal
83.1°
—
August records over 66 years
103.8°14 August 2007All-time high
51.8°29 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Louisiana (10 mi).
Mon, 1098° / 74°0.01
98 °
Pleasant Hill, Monday, 10 August
Light rain. High 98°, low 74°.
Pressure29.91 inHg
Wind14.4 mph SW
Humidity38%
Visibility6.2 mi
Dew point66°
Tue, 11104° / 72°0.15
104 °
Pleasant Hill, Tuesday, 11 August
Rain. High 104°, low 72°.
Pressure29.83 inHg
Wind17 mph SW
Humidity36%
Visibility6.2 mi
Dew point66°
Wed, 1299° / 73°0.24
99 °
Pleasant Hill, Wednesday, 12 August
Rain. High 99°, low 73°.
Pressure29.80 inHg
Wind5.9 mph NW
Humidity41%
Visibility6.2 mi
Dew point66°
Thu, 1384° / 70°0.19
84 °
Pleasant Hill, Thursday, 13 August
Light rain. High 84°, low 70°.
Pressure29.91 inHg
Wind16.4 mph NE
Humidity57%
Visibility—
Dew point65°
Fri, 1473° / 64°0.15
73 °
Pleasant Hill, Friday, 14 August
Light rain. High 73°, low 64°.
Pressure30.09 inHg
Wind16.2 mph NE
Humidity79%
Visibility—
Dew point63°
Sat, 1585° / 65°0.16
85 °
Pleasant Hill, Saturday, 15 August
Light rain. High 85°, low 65°.
Pressure30.12 inHg
Wind12.8 mph SE
Humidity67%
Visibility—
Dew point66°
Sun, 1693° / 69°0
93 °
Pleasant Hill, Sunday, 16 August
Overcast. High 93°, low 69°.
Pressure30.03 inHg
Wind11.5 mph N
Humidity52%
Visibility—
Dew point67°
Mon, 1790° / 69°0
90 °
Pleasant Hill, Monday, 17 August
Partly cloudy. High 90°, low 69°.
Pressure30.06 inHg
Wind8.9 mph E
Humidity47%
Visibility—
Dew point63°
Tue, 1893° / 68°0.02
93 °
Pleasant Hill, Tuesday, 18 August
Light rain. High 93°, low 68°.
Pressure29.94 inHg
Wind11.7 mph E
Humidity50%
Visibility—
Dew point66°
Wed, 19114° / 77°0
114 °
Pleasant Hill, Wednesday, 19 August
Mostly clear. High 114°, low 77°.
Pressure29.85 inHg
Wind13.2 mph W
Humidity26%
Visibility—
Dew point57°
Thu, 20116° / 82°0
116 °
Pleasant Hill, Thursday, 20 August
Clear. High 116°, low 82°.
Pressure29.77 inHg
Wind17.9 mph W
Humidity15%
Visibility—
Dew point51°
Fri, 21107° / 77°0
107 °
Pleasant Hill, Friday, 21 August
Partly cloudy. High 107°, low 77°.
Pressure29.85 inHg
Wind10.5 mph SE
Humidity28%
Visibility—
Dew point61°
Sat, 22115° / 77°0.01
115 °
Pleasant Hill, Saturday, 22 August
Light rain. High 115°, low 77°.
Pressure29.80 inHg
Wind14.9 mph SW
Humidity16%
Visibility—
Dew point52°
Sun, 23109° / 76°0.06
109 °
Pleasant Hill, Sunday, 23 August
Light rain. High 109°, low 76°.
Pressure29.83 inHg
Wind14 mph W
Humidity24%
Visibility—
Dew point58°
Mon, 2496° / 74°0.12
96 °
Pleasant Hill, Monday, 24 August
Light rain. High 96°, low 74°.
Pressure29.97 inHg
Wind13.6 mph W
Humidity42%
Visibility—
Dew point65°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2586° / 69°0.09
86 °
Pleasant Hill, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high86°
Average low69°
Average precipitation0.09 in
Chance of precipitation25%
Record high99° (2003)
Record low57° (2025)
Wed, 2686° / 69°0.16
86 °
Pleasant Hill, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high86°
Average low69°
Average precipitation0.16 in
Chance of precipitation37%
Record high101° (2003)
Record low54° (2025)
Thu, 2786° / 70°0.09
86 °
Pleasant Hill, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high86°
Average low70°
Average precipitation0.09 in
Chance of precipitation23%
Record high96° (1983)
Record low56° (2025)
Fri, 2885° / 69°0.12
85 °
Pleasant Hill, Friday, 28 August
Climate normal for this date — 60-year average.
Average high85°
Average low69°
Average precipitation0.12 in
Chance of precipitation25%
Record high97° (2000)
Record low54° (1986)
Sat, 2985° / 68°0.05
85 °
Pleasant Hill, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high85°
Average low68°
Average precipitation0.05 in
Chance of precipitation22%
Record high100° (1984)
Record low52° (1986)
Sun, 3084° / 68°0.09
84 °
Pleasant Hill, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high84°
Average low68°
Average precipitation0.09 in
Chance of precipitation28%
Record high99° (2013)
Record low56° (2009)
Mon, 3184° / 68°0.09
84 °
Pleasant Hill, Monday, 31 August
Climate normal for this date — 60-year average.
Average high84°
Average low68°
Average precipitation0.09 in
Chance of precipitation27%
Record high99° (2013)
Record low55° (1967)
Tue, 0183° / 68°0.09
83 °
Pleasant Hill, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high83°
Average low68°
Average precipitation0.09 in
Chance of precipitation25%
Record high100° (2011)
Record low52° (1967)
Wed, 0283° / 67°0.11
83 °
Pleasant Hill, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.11 in
Chance of precipitation27%
Record high97° (2011)
Record low51° (1974)
Thu, 0383° / 67°0.09
83 °
Pleasant Hill, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.09 in
Chance of precipitation22%
Record high95° (1960)
Record low49° (1974)
Fri, 0482° / 66°0.09
82 °
Pleasant Hill, Friday, 4 September
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.09 in
Chance of precipitation22%
Record high95° (1990)
Record low47° (1974)
Sat, 0582° / 66°0.04
82 °
Pleasant Hill, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.04 in
Chance of precipitation17%
Record high97° (1998)
Record low51° (1974)
Sun, 0682° / 66°0.05
82 °
Pleasant Hill, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.05 in
Chance of precipitation28%
Record high98° (1990)
Record low52° (1974)
Mon, 0782° / 65°0.08
82 °
Pleasant Hill, Monday, 7 September
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.08 in
Chance of precipitation27%
Record high96° (1960)
Record low50° (2025)
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 Pleasant Hill, 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 Pleasant Hill, 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.