Monthly outlook for Charlotte, IL: average high 77.7°, average low 62.6°. That is 1.9° below the climate normal for August. Precipitation is expected on 6 days (about 0.7 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 9 August (90.1°), the coolest 21 August (51.9°).
77.7°/62.6°
Average high / low
−1.9°
Below normal
6 / 5
Wet days / normal
0.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
78.6°
81°
-1.4°
18 August – 27 August
76.3°
81.4°
-2.9°
28 August – 6 September
at normal
80.2°
—
August records over 66 years
97°17 August 1983All-time high
44.8°29 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Chatsworth (6 mi).
Sun, 0990° / 66°0
90 °
Charlotte, Sunday, 9 August
Mostly clear. High 90°, low 66°.
Pressure29.94 inHg
Wind15 mph S
Humidity77%
Visibility6.2 mi
Dew point75°
Mon, 1087° / 74°0.06
87 °
Charlotte, Monday, 10 August
Light rain. High 87°, low 74°.
Pressure29.94 inHg
Wind9.5 mph W
Humidity72%
Visibility6.2 mi
Dew point74°
Tue, 1181° / 71°0.19
81 °
Charlotte, Tuesday, 11 August
Rain. High 81°, low 71°.
Pressure29.80 inHg
Wind9.1 mph SW
Humidity82%
Visibility6.2 mi
Dew point70°
Wed, 1282° / 69°0.02
82 °
Charlotte, Wednesday, 12 August
Light rain. High 82°, low 69°.
Pressure29.85 inHg
Wind1.2 mph NW
Humidity74%
Visibility6.2 mi
Dew point72°
Thu, 1376° / 62°0.19
76 °
Charlotte, Thursday, 13 August
Rain. High 76°, low 62°.
Pressure29.97 inHg
Wind10.9 mph E
Humidity71%
Visibility—
Dew point64°
Fri, 1476° / 60°0
76 °
Charlotte, Friday, 14 August
Partly cloudy. High 76°, low 60°.
Pressure30.09 inHg
Wind7.8 mph E
Humidity69%
Visibility—
Dew point63°
Sat, 1565° / 58°0.07
65 °
Charlotte, Saturday, 15 August
Light rain. High 65°, low 58°.
Pressure30.27 inHg
Wind9.8 mph E
Humidity90%
Visibility—
Dew point61°
Sun, 1667° / 61°0
67 °
Charlotte, Sunday, 16 August
Overcast. High 67°, low 61°.
Pressure30.15 inHg
Wind6.6 mph E
Humidity85%
Visibility—
Dew point60°
Mon, 1777° / 61°0.02
77 °
Charlotte, Monday, 17 August
Light rain. High 77°, low 61°.
Pressure30.06 inHg
Wind5.2 mph N
Humidity83%
Visibility—
Dew point64°
Tue, 1881° / 65°0
81 °
Charlotte, Tuesday, 18 August
Overcast. High 81°, low 65°.
Pressure30.00 inHg
Wind7.2 mph SW
Humidity71%
Visibility—
Dew point67°
Wed, 1975° / 60°0.1
75 °
Charlotte, Wednesday, 19 August
Light rain. High 75°, low 60°.
Pressure29.91 inHg
Wind11.1 mph NW
Humidity71%
Visibility—
Dew point64°
Thu, 2070° / 53°0.04
70 °
Charlotte, Thursday, 20 August
Light rain. High 70°, low 53°.
Pressure30.06 inHg
Wind12.9 mph N
Humidity66%
Visibility—
Dew point56°
Fri, 2173° / 52°0
73 °
Charlotte, Friday, 21 August
Overcast. High 73°, low 52°.
Pressure30.06 inHg
Wind6.2 mph N
Humidity63%
Visibility—
Dew point55°
Sat, 2276° / 57°0.02
76 °
Charlotte, Saturday, 22 August
Light rain. High 76°, low 57°.
Pressure29.88 inHg
Wind10.8 mph SE
Humidity76%
Visibility—
Dew point63°
Sun, 2383° / 66°0
83 °
Charlotte, Sunday, 23 August
Overcast. High 83°, low 66°.
Pressure29.91 inHg
Wind13.6 mph W
Humidity61%
Visibility—
Dew point66°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2482° / 64°0.07
82 °
Charlotte, Monday, 24 August
Climate normal for this date — 60-year average.
Average high82°
Average low64°
Average precipitation0.07 in
Chance of precipitation25%
Record high96° (2011)
Record low52° (1966)
Tue, 2582° / 64°0.13
82 °
Charlotte, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high82°
Average low64°
Average precipitation0.13 in
Chance of precipitation30%
Record high93° (2020)
Record low53° (2017)
Wed, 2682° / 65°0.13
82 °
Charlotte, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.13 in
Chance of precipitation32%
Record high92° (2024)
Record low51° (2025)
Thu, 2782° / 66°0.11
82 °
Charlotte, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.11 in
Chance of precipitation25%
Record high95° (2024)
Record low51° (1968)
Fri, 2882° / 65°0.14
82 °
Charlotte, Friday, 28 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.14 in
Chance of precipitation35%
Record high92° (1990)
Record low48° (1986)
Sat, 2981° / 64°0.12
81 °
Charlotte, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.12 in
Chance of precipitation35%
Record high93° (1984)
Record low45° (1986)
Sun, 3080° / 64°0.07
80 °
Charlotte, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.07 in
Chance of precipitation28%
Record high94° (1995)
Record low48° (1986)
Mon, 3180° / 63°0.09
80 °
Charlotte, Monday, 31 August
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.09 in
Chance of precipitation27%
Record high94° (2011)
Record low49° (2009)
Tue, 0180° / 63°0.11
80 °
Charlotte, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.11 in
Chance of precipitation25%
Record high100° (2011)
Record low49° (1967)
Wed, 0280° / 64°0.08
80 °
Charlotte, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.08 in
Chance of precipitation20%
Record high99° (2011)
Record low47° (2017)
Thu, 0380° / 63°0.07
80 °
Charlotte, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.07 in
Chance of precipitation27%
Record high96° (2011)
Record low48° (1974)
Fri, 0479° / 62°0.07
79 °
Charlotte, Friday, 4 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.07 in
Chance of precipitation27%
Record high94° (1960)
Record low46° (1974)
Sat, 0580° / 62°0.06
80 °
Charlotte, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high80°
Average low62°
Average precipitation0.06 in
Chance of precipitation22%
Record high92° (2007)
Record low49° (1997)
Sun, 0679° / 62°0.1
79 °
Charlotte, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.1 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 Charlotte, 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 Charlotte, 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.