Monthly outlook for Glendale Heights, IN: average high 86.2°, average low 69.3°. That is 2.7° above the climate normal for August. Precipitation is expected on 7 days (about 3.5 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 23 August (97°), the coolest 14 August (58.9°).
86.2°/69.3°
Average high / low
+2.7°
Above normal
7 / 5
Wet days / normal
3.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
83°
81.3°
+1°
19 August – 28 August
91.4°
81.4°
+5.6°
29 August – 7 September
at normal
79.7°
—
August records over 66 years
99°17 August 1988All-time high
45°29 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Carmel (6 mi).
Mon, 1096° / 74°0.14
96 °
Glendale Heights, Monday, 10 August
Rain. High 96°, low 74°.
Pressure29.97 inHg
Wind12.2 mph SW
Humidity65%
Visibility6.2 mi
Dew point72°
Tue, 1190° / 73°0.1
90 °
Glendale Heights, Tuesday, 11 August
Light rain. High 90°, low 73°.
Pressure29.91 inHg
Wind9.8 mph SW
Humidity62%
Visibility6.2 mi
Dew point72°
Wed, 1285° / 68°1.12
85 °
Glendale Heights, Wednesday, 12 August
Heavy rain. High 85°, low 68°.
Pressure29.83 inHg
Wind7 mph SW
Humidity71%
Visibility6.2 mi
Dew point74°
Thu, 1381° / 66°0.05
81 °
Glendale Heights, Thursday, 13 August
Light rain. High 81°, low 66°.
Pressure29.97 inHg
Wind8.7 mph NE
Humidity55%
Visibility—
Dew point61°
Fri, 1470° / 59°1.86
70 °
Glendale Heights, Friday, 14 August
Heavy rain. High 70°, low 59°.
Pressure30.15 inHg
Wind9.6 mph NE
Humidity83%
Visibility—
Dew point60°
Sat, 1573° / 61°0
73 °
Glendale Heights, Saturday, 15 August
Overcast. High 73°, low 61°.
Pressure30.24 inHg
Wind10 mph SE
Humidity58%
Visibility—
Dew point55°
Sun, 1680° / 62°0.05
80 °
Glendale Heights, Sunday, 16 August
Light rain. High 80°, low 62°.
Pressure30.09 inHg
Wind7 mph SE
Humidity69%
Visibility—
Dew point64°
Mon, 1780° / 69°0.01
80 °
Glendale Heights, Monday, 17 August
Light rain. High 80°, low 69°.
Pressure30.06 inHg
Wind8.8 mph N
Humidity65%
Visibility—
Dew point66°
Tue, 1882° / 65°0
82 °
Glendale Heights, Tuesday, 18 August
Clear. High 82°, low 65°.
Pressure30.03 inHg
Wind4.5 mph SE
Humidity57%
Visibility—
Dew point62°
Wed, 1984° / 67°0.01
84 °
Glendale Heights, Wednesday, 19 August
Light rain. High 84°, low 67°.
Pressure29.97 inHg
Wind9.3 mph SE
Humidity73%
Visibility—
Dew point67°
Thu, 2095° / 73°0
95 °
Glendale Heights, Thursday, 20 August
Partly cloudy. High 95°, low 73°.
Pressure29.85 inHg
Wind10.2 mph SW
Humidity54%
Visibility—
Dew point71°
Fri, 2192° / 76°0
92 °
Glendale Heights, Friday, 21 August
Partly cloudy. High 92°, low 76°.
Pressure29.85 inHg
Wind7 mph NE
Humidity57%
Visibility—
Dew point73°
Sat, 2294° / 75°0
94 °
Glendale Heights, Saturday, 22 August
Partly cloudy. High 94°, low 75°.
Pressure29.91 inHg
Wind7.4 mph SE
Humidity58%
Visibility—
Dew point72°
Sun, 2397° / 79°0
97 °
Glendale Heights, Sunday, 23 August
Partly cloudy. High 97°, low 79°.
Pressure29.88 inHg
Wind8.5 mph W
Humidity41%
Visibility—
Dew point67°
Mon, 2487° / 73°0.15
87 °
Glendale Heights, Monday, 24 August
Rain. High 87°, low 73°.
Pressure30.00 inHg
Wind10.4 mph N
Humidity67%
Visibility—
Dew point71°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2582° / 64°0.07
82 °
Glendale Heights, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high82°
Average low64°
Average precipitation0.07 in
Chance of precipitation27%
Record high91° (2020)
Record low53° (1984)
Wed, 2682° / 65°0.11
82 °
Glendale Heights, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.11 in
Chance of precipitation37%
Record high90° (2020)
Record low54° (1963)
Thu, 2782° / 66°0.11
82 °
Glendale Heights, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.11 in
Chance of precipitation33%
Record high93° (2024)
Record low52° (2025)
Fri, 2882° / 66°0.19
82 °
Glendale Heights, Friday, 28 August
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.19 in
Chance of precipitation42%
Record high91° (1990)
Record low49° (1986)
Sat, 2981° / 65°0.15
81 °
Glendale Heights, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.15 in
Chance of precipitation33%
Record high91° (2007)
Record low45° (1986)
Sun, 3080° / 64°0.11
80 °
Glendale Heights, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.11 in
Chance of precipitation30%
Record high92° (2024)
Record low49° (1986)
Mon, 3180° / 64°0.06
80 °
Glendale Heights, Monday, 31 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.06 in
Chance of precipitation25%
Record high91° (2011)
Record low51° (2009)
Tue, 0180° / 64°0.12
80 °
Glendale Heights, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.12 in
Chance of precipitation22%
Record high97° (2011)
Record low49° (1967)
Wed, 0280° / 64°0.13
80 °
Glendale Heights, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.13 in
Chance of precipitation32%
Record high98° (2011)
Record low49° (1967)
Thu, 0380° / 63°0.11
80 °
Glendale Heights, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.11 in
Chance of precipitation28%
Record high95° (2011)
Record low49° (1974)
Fri, 0479° / 63°0.04
79 °
Glendale Heights, Friday, 4 September
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.04 in
Chance of precipitation27%
Record high93° (1999)
Record low49° (1997)
Sat, 0579° / 62°0.04
79 °
Glendale Heights, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.04 in
Chance of precipitation27%
Record high94° (2007)
Record low48° (1997)
Sun, 0679° / 62°0.04
79 °
Glendale Heights, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.04 in
Chance of precipitation22%
Record high91° (1998)
Record low48° (1962)
Mon, 0779° / 62°0.07
79 °
Glendale Heights, Monday, 7 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.07 in
Chance of precipitation27%
Record high91° (2002)
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 Glendale Heights, IN 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 Glendale Heights, IN 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.