Monthly outlook for Adeline, IL: average high 76.8°, average low 61°. That is 1.7° below the climate normal for August. Precipitation is expected on 5 days (about 1.2 inches), against a normal of 5 days and 2.1 inches. The warmest day looks like 9 August (86°), the coolest 20 August (51.7°).
76.8°/61°
Average high / low
−1.7°
Below normal
5 / 5
Wet days / normal
1.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
78.7°
80°
-0.7°
18 August – 27 August
73.5°
79.9°
-3.5°
28 August – 6 September
at normal
78.3°
—
August records over 66 years
99.5°16 August 1988All-time high
44.8°29 August 1965All-time low
Climate normals and records are computed from the nearest reference point — Freeport (13 mi).
Sun, 0986° / 62°0.12
86 °
Adeline, Sunday, 9 August
Light rain. High 86°, low 62°.
Pressure29.91 inHg
Wind3.8 mph S
Humidity87%
Visibility6.2 mi
Dew point74°
Mon, 1086° / 70°0.62
86 °
Adeline, Monday, 10 August
Heavy rain. High 86°, low 70°.
Pressure29.88 inHg
Wind5.1 mph SE
Humidity78%
Visibility6.2 mi
Dew point74°
Tue, 1185° / 70°0.11
85 °
Adeline, Tuesday, 11 August
Rain. High 85°, low 70°.
Pressure29.77 inHg
Wind3.6 mph W
Humidity86%
Visibility6.2 mi
Dew point73°
Wed, 1280° / 67°0.01
80 °
Adeline, Wednesday, 12 August
Light rain. High 80°, low 67°.
Pressure29.88 inHg
Wind6.6 mph NW
Humidity88%
Visibility6.2 mi
Dew point71°
Thu, 1372° / 59°0
72 °
Adeline, Thursday, 13 August
Overcast. High 72°, low 59°.
Pressure30.03 inHg
Wind8.3 mph E
Humidity75%
Visibility—
Dew point62°
Fri, 1476° / 57°0
76 °
Adeline, Friday, 14 August
Partly cloudy. High 76°, low 57°.
Pressure30.12 inHg
Wind5.2 mph SE
Humidity58%
Visibility—
Dew point57°
Sat, 1569° / 59°0.02
69 °
Adeline, Saturday, 15 August
Light rain. High 69°, low 59°.
Pressure30.30 inHg
Wind9.8 mph S
Humidity64%
Visibility—
Dew point55°
Sun, 1672° / 58°0
72 °
Adeline, Sunday, 16 August
Overcast. High 72°, low 58°.
Pressure30.15 inHg
Wind6.2 mph SE
Humidity71%
Visibility—
Dew point58°
Mon, 1779° / 63°0
79 °
Adeline, Monday, 17 August
Overcast. High 79°, low 63°.
Pressure30.06 inHg
Wind6.3 mph S
Humidity70%
Visibility—
Dew point64°
Tue, 1882° / 65°0
82 °
Adeline, Tuesday, 18 August
Overcast. High 82°, low 65°.
Pressure29.97 inHg
Wind12.9 mph SW
Humidity69%
Visibility—
Dew point67°
Wed, 1973° / 59°0.06
73 °
Adeline, Wednesday, 19 August
Light rain. High 73°, low 59°.
Pressure29.97 inHg
Wind15.9 mph NW
Humidity86%
Visibility—
Dew point58°
Thu, 2062° / 52°0
62 °
Adeline, Thursday, 20 August
Overcast. High 62°, low 52°.
Pressure30.09 inHg
Wind8.3 mph N
Humidity72%
Visibility—
Dew point52°
Fri, 2174° / 53°0
74 °
Adeline, Friday, 21 August
Partly cloudy. High 74°, low 53°.
Pressure30.06 inHg
Wind6.8 mph SE
Humidity62%
Visibility—
Dew point56°
Sat, 2272° / 54°0.04
72 °
Adeline, Saturday, 22 August
Light rain. High 72°, low 54°.
Pressure29.88 inHg
Wind10.3 mph SE
Humidity80%
Visibility—
Dew point57°
Sun, 2378° / 63°0
78 °
Adeline, Sunday, 23 August
Clear. High 78°, low 63°.
Pressure29.91 inHg
Wind13.9 mph SW
Humidity50%
Visibility—
Dew point56°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2480° / 63°0.09
80 °
Adeline, Monday, 24 August
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.09 in
Chance of precipitation25%
Record high97° (2023)
Record low50° (1984)
Tue, 2580° / 64°0.1
80 °
Adeline, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.1 in
Chance of precipitation28%
Record high92° (1991)
Record low51° (1967)
Wed, 2680° / 64°0.18
80 °
Adeline, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.18 in
Chance of precipitation33%
Record high94° (2003)
Record low50° (1964)
Thu, 2780° / 65°0.11
80 °
Adeline, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high80°
Average low65°
Average precipitation0.11 in
Chance of precipitation28%
Record high94° (2024)
Record low50° (1968)
Fri, 2880° / 63°0.17
80 °
Adeline, Friday, 28 August
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.17 in
Chance of precipitation35%
Record high94° (1984)
Record low46° (1986)
Sat, 2980° / 63°0.16
80 °
Adeline, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.16 in
Chance of precipitation27%
Record high94° (1984)
Record low45° (1965)
Sun, 3078° / 62°0.07
78 °
Adeline, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.07 in
Chance of precipitation28%
Record high94° (2013)
Record low52° (2009)
Mon, 3178° / 62°0.07
78 °
Adeline, Monday, 31 August
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.07 in
Chance of precipitation22%
Record high91° (2012)
Record low46° (2009)
Tue, 0178° / 62°0.1
78 °
Adeline, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.1 in
Chance of precipitation32%
Record high91° (1984)
Record low45° (1967)
Wed, 0279° / 62°0.06
79 °
Adeline, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.06 in
Chance of precipitation25%
Record high91° (2008)
Record low47° (1967)
Thu, 0378° / 62°0.12
78 °
Adeline, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.12 in
Chance of precipitation33%
Record high92° (2023)
Record low47° (1974)
Fri, 0477° / 60°0.1
77 °
Adeline, Friday, 4 September
Climate normal for this date — 60-year average.
Average high77°
Average low60°
Average precipitation0.1 in
Chance of precipitation30%
Record high92° (2023)
Record low45° (1974)
Sat, 0577° / 60°0.08
77 °
Adeline, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high77°
Average low60°
Average precipitation0.08 in
Chance of precipitation20%
Record high89° (2023)
Record low48° (1974)
Sun, 0677° / 60°0.09
77 °
Adeline, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high77°
Average low60°
Average precipitation0.09 in
Chance of precipitation30%
Record high91° (1990)
Record low44° (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 Adeline, 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 Adeline, 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.