Monthly outlook for Jewell Road, IL: average high 79.2°, average low 63.6°. That is 0.3° below the climate normal for August. Precipitation is expected on 7 days (about 3.0 inches), against a normal of 6 days and 1.8 inches. The warmest day looks like 10 August (90.6°), the coolest 23 August (58°).
79.2°/63.6°
Average high / low
−0.3°
Below normal
7 / 6
Wet days / normal
3.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
80.3°
79.9°
+0.2°
19 August – 28 August
77.4°
79.9°
-1.4°
29 August – 7 September
at normal
78.1°
—
August records over 66 years
99.3°24 August 2023All-time high
45.1°29 August 1965All-time low
Climate normals and records are computed from the nearest reference point — Glendale Heights (4 mi).
Mon, 1091° / 72°0.67
91 °
Jewell Road, Monday, 10 August
Heavy rain. High 91°, low 72°.
Pressure29.88 inHg
Wind2.8 mph S
Humidity68%
Visibility6.2 mi
Dew point74°
Tue, 1185° / 66°0.78
85 °
Jewell Road, Tuesday, 11 August
Heavy rain. High 85°, low 66°.
Pressure29.83 inHg
Wind9.8 mph S
Humidity71%
Visibility6.2 mi
Dew point73°
Wed, 1284° / 65°0.01
84 °
Jewell Road, Wednesday, 12 August
Light rain. High 84°, low 65°.
Pressure29.85 inHg
Wind2.5 mph NW
Humidity58%
Visibility6.2 mi
Dew point66°
Thu, 1375° / 65°0.11
75 °
Jewell Road, Thursday, 13 August
Light rain. High 75°, low 65°.
Pressure29.94 inHg
Wind7.3 mph E
Humidity62%
Visibility—
Dew point60°
Fri, 1475° / 62°0
75 °
Jewell Road, Friday, 14 August
Overcast. High 75°, low 62°.
Pressure30.15 inHg
Wind13.7 mph E
Humidity48%
Visibility—
Dew point52°
Sat, 1575° / 65°0.04
75 °
Jewell Road, Saturday, 15 August
Light rain. High 75°, low 65°.
Pressure30.21 inHg
Wind13.3 mph SE
Humidity53%
Visibility—
Dew point53°
Sun, 1676° / 65°0.26
76 °
Jewell Road, Sunday, 16 August
Rain. High 76°, low 65°.
Pressure30.00 inHg
Wind11.6 mph NW
Humidity80%
Visibility—
Dew point68°
Mon, 1778° / 65°0
78 °
Jewell Road, Monday, 17 August
Overcast. High 78°, low 65°.
Pressure30.09 inHg
Wind7.7 mph N
Humidity59%
Visibility—
Dew point57°
Tue, 1878° / 60°0
78 °
Jewell Road, Tuesday, 18 August
Overcast. High 78°, low 60°.
Pressure29.91 inHg
Wind8.2 mph S
Humidity77%
Visibility—
Dew point61°
Wed, 1976° / 65°0.02
76 °
Jewell Road, Wednesday, 19 August
Light rain. High 76°, low 65°.
Pressure29.83 inHg
Wind13.6 mph NW
Humidity62%
Visibility—
Dew point62°
Thu, 2073° / 62°0.25
73 °
Jewell Road, Thursday, 20 August
Rain. High 73°, low 62°.
Pressure29.94 inHg
Wind5.6 mph SE
Humidity71%
Visibility—
Dew point62°
Fri, 2180° / 61°0.35
80 °
Jewell Road, Friday, 21 August
Rain. High 80°, low 61°.
Pressure29.83 inHg
Wind15.4 mph S
Humidity62%
Visibility—
Dew point62°
Sat, 2281° / 65°0.04
81 °
Jewell Road, Saturday, 22 August
Light rain. High 81°, low 65°.
Pressure29.80 inHg
Wind13.1 mph NW
Humidity50%
Visibility—
Dew point58°
Sun, 2376° / 58°0
76 °
Jewell Road, Sunday, 23 August
Clear. High 76°, low 58°.
Pressure30.15 inHg
Wind8.8 mph W
Humidity47%
Visibility—
Dew point51°
Mon, 2479° / 61°0
79 °
Jewell Road, Monday, 24 August
Clear. High 79°, low 61°.
Pressure30.21 inHg
Wind7.1 mph W
Humidity59%
Visibility—
Dew point59°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2580° / 64°0.07
80 °
Jewell Road, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.07 in
Chance of precipitation25%
Record high92° (2003)
Record low52° (2017)
Wed, 2681° / 65°0.15
81 °
Jewell Road, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.15 in
Chance of precipitation32%
Record high95° (2024)
Record low51° (1964)
Thu, 2780° / 66°0.11
80 °
Jewell Road, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high80°
Average low66°
Average precipitation0.11 in
Chance of precipitation30%
Record high97° (2024)
Record low54° (2015)
Fri, 2880° / 65°0.13
80 °
Jewell Road, Friday, 28 August
Climate normal for this date — 60-year average.
Average high80°
Average low65°
Average precipitation0.13 in
Chance of precipitation37%
Record high93° (1984)
Record low48° (1986)
Sat, 2980° / 64°0.11
80 °
Jewell Road, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.11 in
Chance of precipitation30%
Record high94° (1984)
Record low45° (1965)
Sun, 3079° / 63°0.13
79 °
Jewell Road, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.13 in
Chance of precipitation28%
Record high93° (2013)
Record low51° (1986)
Mon, 3178° / 63°0.08
78 °
Jewell Road, Monday, 31 August
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.08 in
Chance of precipitation18%
Record high90° (2012)
Record low51° (2009)
Tue, 0178° / 63°0.12
78 °
Jewell Road, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.12 in
Chance of precipitation32%
Record high93° (2011)
Record low47° (2009)
Wed, 0279° / 63°0.04
79 °
Jewell Road, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.04 in
Chance of precipitation22%
Record high92° (2008)
Record low48° (1965)
Thu, 0378° / 63°0.09
78 °
Jewell Road, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.09 in
Chance of precipitation30%
Record high94° (2023)
Record low48° (1974)
Fri, 0477° / 62°0.09
77 °
Jewell Road, Friday, 4 September
Climate normal for this date — 60-year average.
Average high77°
Average low62°
Average precipitation0.09 in
Chance of precipitation32%
Record high92° (2023)
Record low47° (1974)
Sat, 0577° / 61°0.08
77 °
Jewell Road, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.08 in
Chance of precipitation23%
Record high90° (2023)
Record low50° (2010)
Sun, 0677° / 61°0.11
77 °
Jewell Road, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.11 in
Chance of precipitation37%
Record high91° (1990)
Record low47° (1988)
Mon, 0777° / 61°0.09
77 °
Jewell Road, Monday, 7 September
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.09 in
Chance of precipitation27%
Record high91° (1960)
Record low47° (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 Jewell Road, 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 Jewell Road, 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.