Monthly outlook for Horatio Gardens, IL: average high 78.8°, average low 63.9°. That is 0.6° above the climate normal for August. Precipitation is expected on 3 days (about 2.8 inches), against a normal of 6 days and 1.8 inches. The warmest day looks like 10 August (85.8°), the coolest 20 August (56°).
78.8°/63.9°
Average high / low
+0.6°
Above normal
3 / 6
Wet days / normal
2.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
81°
77.9°
+1.7°
19 August – 28 August
75.3°
77.8°
-1.4°
29 August – 7 September
at normal
76.1°
—
August records over 66 years
98.6°24 August 2023All-time high
52.5°22 August 2024All-time low
Climate normals and records are computed from the nearest reference point — Highwood (7 mi).
Mon, 1086° / 70°0.94
86 °
Horatio Gardens, Monday, 10 August
Heavy rain. High 86°, low 70°.
Pressure29.91 inHg
Wind3.2 mph SE
Humidity63%
Visibility6.2 mi
Dew point67°
Tue, 1185° / 70°0.59
85 °
Horatio Gardens, Tuesday, 11 August
Heavy rain. High 85°, low 70°.
Pressure29.80 inHg
Wind3.1 mph SE
Humidity92%
Visibility6.2 mi
Dew point73°
Wed, 1282° / 68°0
82 °
Horatio Gardens, Wednesday, 12 August
Overcast. High 82°, low 68°.
Pressure29.85 inHg
Wind4.9 mph NW
Humidity63%
Visibility6.2 mi
Dew point66°
Thu, 1372° / 65°0
72 °
Horatio Gardens, Thursday, 13 August
Overcast. High 72°, low 65°.
Pressure30.03 inHg
Wind8.4 mph NE
Humidity54%
Visibility—
Dew point53°
Fri, 1478° / 60°0
78 °
Horatio Gardens, Friday, 14 August
Clear. High 78°, low 60°.
Pressure30.12 inHg
Wind7.9 mph NE
Humidity43%
Visibility—
Dew point52°
Sat, 1577° / 65°0
77 °
Horatio Gardens, Saturday, 15 August
Overcast. High 77°, low 65°.
Pressure30.27 inHg
Wind5.7 mph E
Humidity38%
Visibility—
Dew point49°
Sun, 1678° / 63°0
78 °
Horatio Gardens, Sunday, 16 August
Overcast. High 78°, low 63°.
Pressure30.15 inHg
Wind4.8 mph E
Humidity51%
Visibility—
Dew point55°
Mon, 1782° / 65°0.01
82 °
Horatio Gardens, Monday, 17 August
Light rain. High 82°, low 65°.
Pressure30.03 inHg
Wind4.7 mph W
Humidity54%
Visibility—
Dew point60°
Tue, 1884° / 68°0
84 °
Horatio Gardens, Tuesday, 18 August
Overcast. High 84°, low 68°.
Pressure29.97 inHg
Wind11.1 mph SW
Humidity52%
Visibility—
Dew point62°
Wed, 1975° / 63°0.01
75 °
Horatio Gardens, Wednesday, 19 August
Light rain. High 75°, low 63°.
Pressure29.91 inHg
Wind15.4 mph NW
Humidity62%
Visibility—
Dew point57°
Thu, 2068° / 56°0
68 °
Horatio Gardens, Thursday, 20 August
Overcast. High 68°, low 56°.
Pressure30.06 inHg
Wind9.4 mph NW
Humidity52%
Visibility—
Dew point48°
Fri, 2174° / 56°0
74 °
Horatio Gardens, Friday, 21 August
Clear. High 74°, low 56°.
Pressure30.09 inHg
Wind8.4 mph NE
Humidity45%
Visibility—
Dew point49°
Sat, 2268° / 61°0.02
68 °
Horatio Gardens, Saturday, 22 August
Light rain. High 68°, low 61°.
Pressure29.91 inHg
Wind7.6 mph S
Humidity79%
Visibility—
Dew point57°
Sun, 2382° / 65°0
82 °
Horatio Gardens, Sunday, 23 August
Mostly clear. High 82°, low 65°.
Pressure29.88 inHg
Wind13.3 mph W
Humidity38%
Visibility—
Dew point52°
Mon, 2484° / 63°0
84 °
Horatio Gardens, Monday, 24 August
Overcast. High 84°, low 63°.
Pressure30.00 inHg
Wind4.5 mph W
Humidity39%
Visibility—
Dew point54°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2578° / 68°0.07
78 °
Horatio Gardens, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high78°
Average low68°
Average precipitation0.07 in
Chance of precipitation25%
Record high91° (2024)
Record low54° (2017)
Wed, 2679° / 68°0.14
79 °
Horatio Gardens, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high79°
Average low68°
Average precipitation0.14 in
Chance of precipitation35%
Record high94° (2024)
Record low54° (2025)
Thu, 2778° / 69°0.1
78 °
Horatio Gardens, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high78°
Average low69°
Average precipitation0.1 in
Chance of precipitation32%
Record high96° (2024)
Record low55° (2025)
Fri, 2878° / 68°0.12
78 °
Horatio Gardens, Friday, 28 August
Climate normal for this date — 60-year average.
Average high78°
Average low68°
Average precipitation0.12 in
Chance of precipitation35%
Record high92° (2021)
Record low54° (1986)
Sat, 2978° / 68°0.13
78 °
Horatio Gardens, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high78°
Average low68°
Average precipitation0.13 in
Chance of precipitation28%
Record high89° (1984)
Record low54° (1965)
Sun, 3077° / 67°0.09
77 °
Horatio Gardens, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high77°
Average low67°
Average precipitation0.09 in
Chance of precipitation27%
Record high91° (2013)
Record low57° (2023)
Mon, 3176° / 67°0.06
76 °
Horatio Gardens, Monday, 31 August
Climate normal for this date — 60-year average.
Average high76°
Average low67°
Average precipitation0.06 in
Chance of precipitation20%
Record high89° (2012)
Record low56° (2025)
Tue, 0176° / 67°0.1
76 °
Horatio Gardens, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high76°
Average low67°
Average precipitation0.1 in
Chance of precipitation28%
Record high89° (1960)
Record low57° (2017)
Wed, 0277° / 67°0.04
77 °
Horatio Gardens, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high77°
Average low67°
Average precipitation0.04 in
Chance of precipitation25%
Record high87° (2023)
Record low50° (2017)
Thu, 0376° / 66°0.09
76 °
Horatio Gardens, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high76°
Average low66°
Average precipitation0.09 in
Chance of precipitation27%
Record high92° (2023)
Record low54° (1974)
Fri, 0475° / 66°0.08
75 °
Horatio Gardens, Friday, 4 September
Climate normal for this date — 60-year average.
Average high75°
Average low66°
Average precipitation0.08 in
Chance of precipitation30%
Record high91° (2023)
Record low49° (2025)
Sat, 0575° / 65°0.08
75 °
Horatio Gardens, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high75°
Average low65°
Average precipitation0.08 in
Chance of precipitation25%
Record high89° (2023)
Record low55° (2017)
Sun, 0675° / 65°0.09
75 °
Horatio Gardens, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high75°
Average low65°
Average precipitation0.09 in
Chance of precipitation33%
Record high90° (1990)
Record low49° (2025)
Mon, 0775° / 65°0.07
75 °
Horatio Gardens, Monday, 7 September
Climate normal for this date — 60-year average.
Average high75°
Average low65°
Average precipitation0.07 in
Chance of precipitation28%
Record high89° (1960)
Record low48° (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 Horatio Gardens, 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 Horatio Gardens, 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.