Monthly outlook for South Rome, IL: average high 83.1°, average low 64.8°. That is 0.9° above the climate normal for August. Precipitation is expected on 4 days (about 1.3 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 11 August (97.2°), the coolest 23 August (58.7°).
83.1°/64.8°
Average high / low
+0.9°
Above normal
4 / 5
Wet days / normal
1.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
83.7°
81.6°
+1.2°
19 August – 28 August
82.1°
81.7°
+0.2°
29 August – 7 September
at normal
80°
—
August records over 66 years
97.7°1 August 1988All-time high
47.1°29 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Peoria (8 mi).
Mon, 1096° / 75°0
96 °
South Rome, Monday, 10 August
Overcast. High 96°, low 75°.
Pressure29.88 inHg
Wind8 mph SW
Humidity60%
Visibility6.2 mi
Dew point71°
Tue, 1197° / 71°0.02
97 °
South Rome, Tuesday, 11 August
Light rain. High 97°, low 71°.
Pressure29.83 inHg
Wind15.2 mph SW
Humidity50%
Visibility6.2 mi
Dew point71°
Wed, 1286° / 70°0.01
86 °
South Rome, Wednesday, 12 August
Light rain. High 86°, low 70°.
Pressure29.85 inHg
Wind5.4 mph NE
Humidity61%
Visibility6.2 mi
Dew point68°
Thu, 1375° / 64°0.56
75 °
South Rome, Thursday, 13 August
Rain. High 75°, low 64°.
Pressure29.91 inHg
Wind17 mph E
Humidity86%
Visibility—
Dew point70°
Fri, 1474° / 65°0.2
74 °
South Rome, Friday, 14 August
Light rain. High 74°, low 65°.
Pressure30.09 inHg
Wind14.8 mph E
Humidity79%
Visibility—
Dew point66°
Sat, 1577° / 64°0.27
77 °
South Rome, Saturday, 15 August
Light rain. High 77°, low 64°.
Pressure30.12 inHg
Wind14.7 mph SE
Humidity75%
Visibility—
Dew point67°
Sun, 1678° / 70°0
78 °
South Rome, Sunday, 16 August
Overcast. High 78°, low 70°.
Pressure30.03 inHg
Wind14.3 mph N
Humidity76%
Visibility—
Dew point68°
Mon, 1776° / 60°0
76 °
South Rome, Monday, 17 August
Partly cloudy. High 76°, low 60°.
Pressure30.12 inHg
Wind7.8 mph N
Humidity58%
Visibility—
Dew point58°
Tue, 1883° / 60°0
83 °
South Rome, Tuesday, 18 August
Overcast. High 83°, low 60°.
Pressure29.85 inHg
Wind11.5 mph S
Humidity65%
Visibility—
Dew point64°
Wed, 1980° / 63°0
80 °
South Rome, Wednesday, 19 August
Partly cloudy. High 80°, low 63°.
Pressure29.85 inHg
Wind14.7 mph N
Humidity56%
Visibility—
Dew point61°
Thu, 2082° / 60°0.02
82 °
South Rome, Thursday, 20 August
Light rain. High 82°, low 60°.
Pressure29.94 inHg
Wind7.1 mph NW
Humidity58%
Visibility—
Dew point60°
Fri, 2185° / 62°0.26
85 °
South Rome, Friday, 21 August
Rain. High 85°, low 62°.
Pressure29.83 inHg
Wind18.1 mph S
Humidity54%
Visibility—
Dew point61°
Sat, 2285° / 67°0.01
85 °
South Rome, Saturday, 22 August
Light rain. High 85°, low 67°.
Pressure29.83 inHg
Wind15.7 mph NW
Humidity44%
Visibility—
Dew point58°
Sun, 2379° / 59°0
79 °
South Rome, Sunday, 23 August
Mostly clear. High 79°, low 59°.
Pressure30.15 inHg
Wind7.4 mph N
Humidity44%
Visibility—
Dew point52°
Mon, 2483° / 60°0
83 °
South Rome, Monday, 24 August
Clear. High 83°, low 60°.
Pressure30.21 inHg
Wind6.4 mph S
Humidity46%
Visibility—
Dew point55°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2582° / 65°0.1
82 °
South Rome, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.1 in
Chance of precipitation33%
Record high94° (2014)
Record low54° (1966)
Wed, 2682° / 66°0.14
82 °
South Rome, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.14 in
Chance of precipitation35%
Record high92° (2003)
Record low53° (1964)
Thu, 2782° / 66°0.09
82 °
South Rome, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.09 in
Chance of precipitation23%
Record high94° (2024)
Record low54° (1968)
Fri, 2882° / 65°0.12
82 °
South Rome, Friday, 28 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.12 in
Chance of precipitation27%
Record high93° (2013)
Record low49° (1986)
Sat, 2982° / 65°0.11
82 °
South Rome, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.11 in
Chance of precipitation35%
Record high94° (1984)
Record low47° (1986)
Sun, 3081° / 65°0.06
81 °
South Rome, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.06 in
Chance of precipitation28%
Record high96° (2013)
Record low52° (1986)
Mon, 3180° / 64°0.08
80 °
South Rome, Monday, 31 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.08 in
Chance of precipitation23%
Record high92° (2011)
Record low50° (2009)
Tue, 0180° / 64°0.17
80 °
South Rome, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.17 in
Chance of precipitation28%
Record high98° (2011)
Record low48° (1967)
Wed, 0280° / 64°0.06
80 °
South Rome, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.06 in
Chance of precipitation22%
Record high95° (2011)
Record low49° (1967)
Thu, 0380° / 64°0.09
80 °
South Rome, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.09 in
Chance of precipitation28%
Record high92° (1964)
Record low47° (1974)
Fri, 0479° / 62°0.11
79 °
South Rome, Friday, 4 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.11 in
Chance of precipitation32%
Record high91° (2007)
Record low44° (1974)
Sat, 0579° / 62°0.04
79 °
South Rome, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.04 in
Chance of precipitation17%
Record high92° (1990)
Record low50° (1974)
Sun, 0678° / 62°0.1
78 °
South Rome, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.1 in
Chance of precipitation33%
Record high92° (2015)
Record low46° (1962)
Mon, 0779° / 62°0.11
79 °
South Rome, Monday, 7 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.11 in
Chance of precipitation28%
Record high92° (1960)
Record low49° (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 South Rome, 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 South Rome, 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.