Monthly outlook for Gilberts, IL: average high 80.4°, average low 64.5°. That is 0.3° above the climate normal for August. Precipitation is expected on 4 days (about 2.0 inches), against a normal of 6 days and 1.8 inches. The warmest day looks like 23 August (89°), the coolest 14 August (56.5°).
80.4°/64.5°
Average high / low
+0.3°
Above normal
4 / 6
Wet days / normal
2.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
77.8°
79.8°
-1.1°
19 August – 28 August
84.7°
79.9°
+2.7°
29 August – 7 September
at normal
78.1°
—
August records over 66 years
98.1°24 August 2023All-time high
46.4°29 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Elgin (6 mi).
Mon, 1088° / 69°0.48
88 °
Gilberts, Monday, 10 August
Rain. High 88°, low 69°.
Pressure29.88 inHg
Wind5.7 mph NE
Humidity82%
Visibility6.2 mi
Dew point74°
Tue, 1180° / 67°0.17
80 °
Gilberts, Tuesday, 11 August
Rain. High 80°, low 67°.
Pressure29.80 inHg
Wind11.2 mph E
Humidity96%
Visibility6.2 mi
Dew point70°
Wed, 1282° / 67°0.02
82 °
Gilberts, Wednesday, 12 August
Light rain. High 82°, low 67°.
Pressure29.85 inHg
Wind5.6 mph NW
Humidity74%
Visibility6.2 mi
Dew point72°
Thu, 1373° / 62°0
73 °
Gilberts, Thursday, 13 August
Overcast. High 73°, low 62°.
Pressure30.03 inHg
Wind9.5 mph NE
Humidity65%
Visibility—
Dew point59°
Fri, 1473° / 57°0
73 °
Gilberts, Friday, 14 August
Partly cloudy. High 73°, low 57°.
Pressure30.15 inHg
Wind10.6 mph NE
Humidity56%
Visibility—
Dew point54°
Sat, 1575° / 57°0
75 °
Gilberts, Saturday, 15 August
Overcast. High 75°, low 57°.
Pressure30.24 inHg
Wind8.3 mph NE
Humidity59%
Visibility—
Dew point56°
Sun, 1672° / 62°0.01
72 °
Gilberts, Sunday, 16 August
Light rain. High 72°, low 62°.
Pressure30.09 inHg
Wind5.8 mph SE
Humidity79%
Visibility—
Dew point62°
Mon, 1780° / 63°0.02
80 °
Gilberts, Monday, 17 August
Light rain. High 80°, low 63°.
Pressure30.06 inHg
Wind10.7 mph E
Humidity69%
Visibility—
Dew point65°
Tue, 1875° / 61°0
75 °
Gilberts, Tuesday, 18 August
Overcast. High 75°, low 61°.
Pressure30.03 inHg
Wind7.4 mph S
Humidity84%
Visibility—
Dew point65°
Wed, 1983° / 67°0.15
83 °
Gilberts, Wednesday, 19 August
Light rain. High 83°, low 67°.
Pressure29.88 inHg
Wind17.9 mph S
Humidity73%
Visibility—
Dew point70°
Thu, 2087° / 73°0
87 °
Gilberts, Thursday, 20 August
Overcast. High 87°, low 73°.
Pressure29.77 inHg
Wind11.4 mph S
Humidity76%
Visibility—
Dew point74°
Fri, 2182° / 69°0
82 °
Gilberts, Friday, 21 August
Clear. High 82°, low 69°.
Pressure29.94 inHg
Wind13.5 mph NE
Humidity59%
Visibility—
Dew point65°
Sat, 2287° / 65°0
87 °
Gilberts, Saturday, 22 August
Light rain. High 87°, low 65°.
Pressure29.88 inHg
Wind12.7 mph S
Humidity67%
Visibility—
Dew point71°
Sun, 2389° / 66°0.01
89 °
Gilberts, Sunday, 23 August
Light rain. High 89°, low 66°.
Pressure29.83 inHg
Wind13.5 mph N
Humidity54%
Visibility—
Dew point67°
Mon, 2479° / 66°0.02
79 °
Gilberts, Monday, 24 August
Light rain. High 79°, low 66°.
Pressure30.06 inHg
Wind11.7 mph NE
Humidity79%
Visibility—
Dew point67°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2580° / 64°0.08
80 °
Gilberts, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.08 in
Chance of precipitation25%
Record high92° (2003)
Record low53° (2025)
Wed, 2680° / 65°0.16
80 °
Gilberts, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high80°
Average low65°
Average precipitation0.16 in
Chance of precipitation33%
Record high95° (2024)
Record low51° (2025)
Thu, 2780° / 65°0.11
80 °
Gilberts, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high80°
Average low65°
Average precipitation0.11 in
Chance of precipitation28%
Record high96° (2024)
Record low53° (2025)
Fri, 2880° / 65°0.13
80 °
Gilberts, Friday, 28 August
Climate normal for this date — 60-year average.
Average high80°
Average low65°
Average precipitation0.13 in
Chance of precipitation38%
Record high93° (1984)
Record low47° (1986)
Sat, 2980° / 64°0.13
80 °
Gilberts, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.13 in
Chance of precipitation28%
Record high94° (1984)
Record low46° (1986)
Sun, 3079° / 63°0.11
79 °
Gilberts, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.11 in
Chance of precipitation28%
Record high94° (2013)
Record low52° (1986)
Mon, 3179° / 63°0.09
79 °
Gilberts, Monday, 31 August
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.09 in
Chance of precipitation20%
Record high90° (2012)
Record low51° (2009)
Tue, 0178° / 63°0.12
78 °
Gilberts, 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 low49° (2009)
Wed, 0278° / 63°0.04
78 °
Gilberts, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.04 in
Chance of precipitation23%
Record high92° (2008)
Record low49° (1967)
Thu, 0378° / 63°0.09
78 °
Gilberts, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.09 in
Chance of precipitation27%
Record high93° (2023)
Record low47° (1974)
Fri, 0477° / 62°0.1
77 °
Gilberts, Friday, 4 September
Climate normal for this date — 60-year average.
Average high77°
Average low62°
Average precipitation0.1 in
Chance of precipitation32%
Record high92° (2023)
Record low47° (1974)
Sat, 0577° / 61°0.07
77 °
Gilberts, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.07 in
Chance of precipitation20%
Record high89° (2023)
Record low50° (1962)
Sun, 0677° / 61°0.12
77 °
Gilberts, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.12 in
Chance of precipitation35%
Record high91° (1990)
Record low48° (2025)
Mon, 0777° / 61°0.09
77 °
Gilberts, Monday, 7 September
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.09 in
Chance of precipitation28%
Record high91° (1960)
Record low46° (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 Gilberts, 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 Gilberts, 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.