Monthly outlook for Rockford, IN: average high 77.7°, average low 60.9°. That is 1.5° below the climate normal for August. Precipitation is expected on 5 days (about 3.0 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 10 August (90.6°), the coolest 21 August (50.9°).
77.7°/60.9°
Average high / low
−1.5°
Below normal
5 / 5
Wet days / normal
3.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
79.5°
80.5°
-0.6°
19 August – 28 August
74.8°
80.6°
-3.2°
29 August – 7 September
at normal
79.2°
—
August records over 66 years
97.5°17 August 1988All-time high
43.7°29 August 1965All-time low
Climate normals and records are computed from the nearest reference point — Warren (8 mi).
Mon, 1091° / 69°1.17
91 °
Rockford, Monday, 10 August
Heavy rain. High 91°, low 69°.
Pressure29.94 inHg
Wind14.8 mph SW
Humidity79%
Visibility6.2 mi
Dew point74°
Tue, 1186° / 67°1.32
86 °
Rockford, Tuesday, 11 August
Heavy rain. High 86°, low 67°.
Pressure29.91 inHg
Wind8.5 mph SW
Humidity80%
Visibility6.2 mi
Dew point75°
Wed, 1281° / 69°0.33
81 °
Rockford, Wednesday, 12 August
Rain. High 81°, low 69°.
Pressure29.80 inHg
Wind4.4 mph N
Humidity78%
Visibility6.2 mi
Dew point71°
Thu, 1373° / 61°0
73 °
Rockford, Thursday, 13 August
Overcast. High 73°, low 61°.
Pressure30.00 inHg
Wind7.1 mph N
Humidity70%
Visibility—
Dew point61°
Fri, 1472° / 55°0.04
72 °
Rockford, Friday, 14 August
Light rain. High 72°, low 55°.
Pressure30.15 inHg
Wind7.9 mph NE
Humidity64%
Visibility—
Dew point56°
Sat, 1573° / 58°0
73 °
Rockford, Saturday, 15 August
Overcast. High 73°, low 58°.
Pressure30.27 inHg
Wind7.5 mph E
Humidity68%
Visibility—
Dew point58°
Sun, 1674° / 59°0.09
74 °
Rockford, Sunday, 16 August
Light rain. High 74°, low 59°.
Pressure30.12 inHg
Wind8.2 mph SE
Humidity73%
Visibility—
Dew point61°
Mon, 1778° / 66°0.02
78 °
Rockford, Monday, 17 August
Light rain. High 78°, low 66°.
Pressure30.06 inHg
Wind6.5 mph N
Humidity72%
Visibility—
Dew point65°
Tue, 1879° / 60°0.02
79 °
Rockford, Tuesday, 18 August
Light rain. High 79°, low 60°.
Pressure30.06 inHg
Wind5.7 mph N
Humidity67%
Visibility—
Dew point64°
Wed, 1977° / 59°0.02
77 °
Rockford, Wednesday, 19 August
Light rain. High 77°, low 59°.
Pressure29.88 inHg
Wind13.4 mph NW
Humidity90%
Visibility—
Dew point71°
Thu, 2068° / 55°0
68 °
Rockford, Thursday, 20 August
Overcast. High 68°, low 55°.
Pressure29.97 inHg
Wind12.7 mph NW
Humidity75%
Visibility—
Dew point58°
Fri, 2170° / 51°0
70 °
Rockford, Friday, 21 August
Clear. High 70°, low 51°.
Pressure30.09 inHg
Wind7.4 mph NW
Humidity57%
Visibility—
Dew point50°
Sat, 2272° / 53°0.01
72 °
Rockford, Saturday, 22 August
Light rain. High 72°, low 53°.
Pressure29.94 inHg
Wind10.5 mph S
Humidity71%
Visibility—
Dew point60°
Sun, 2383° / 65°0
83 °
Rockford, Sunday, 23 August
Mostly clear. High 83°, low 65°.
Pressure29.91 inHg
Wind14.9 mph W
Humidity68%
Visibility—
Dew point68°
Mon, 2479° / 61°0
79 °
Rockford, Monday, 24 August
Clear. High 79°, low 61°.
Pressure30.03 inHg
Wind3.6 mph W
Humidity60%
Visibility—
Dew point61°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2581° / 63°0.06
81 °
Rockford, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high81°
Average low63°
Average precipitation0.06 in
Chance of precipitation25%
Record high93° (2020)
Record low51° (1977)
Wed, 2681° / 64°0.12
81 °
Rockford, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.12 in
Chance of precipitation35%
Record high92° (2020)
Record low52° (2025)
Thu, 2781° / 65°0.11
81 °
Rockford, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.11 in
Chance of precipitation37%
Record high92° (2024)
Record low50° (2025)
Fri, 2881° / 64°0.15
81 °
Rockford, Friday, 28 August
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.15 in
Chance of precipitation35%
Record high91° (1990)
Record low48° (1986)
Sat, 2980° / 63°0.09
80 °
Rockford, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.09 in
Chance of precipitation27%
Record high90° (2007)
Record low44° (1965)
Sun, 3080° / 63°0.09
80 °
Rockford, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.09 in
Chance of precipitation30%
Record high91° (2024)
Record low47° (1986)
Mon, 3180° / 62°0.07
80 °
Rockford, Monday, 31 August
Climate normal for this date — 60-year average.
Average high80°
Average low62°
Average precipitation0.07 in
Chance of precipitation32%
Record high90° (2011)
Record low48° (2009)
Tue, 0179° / 62°0.13
79 °
Rockford, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.13 in
Chance of precipitation23%
Record high96° (2011)
Record low47° (1967)
Wed, 0280° / 63°0.08
80 °
Rockford, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.08 in
Chance of precipitation28%
Record high98° (2011)
Record low47° (1965)
Thu, 0380° / 62°0.09
80 °
Rockford, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high80°
Average low62°
Average precipitation0.09 in
Chance of precipitation28%
Record high96° (2011)
Record low49° (1974)
Fri, 0479° / 61°0.08
79 °
Rockford, Friday, 4 September
Climate normal for this date — 60-year average.
Average high79°
Average low61°
Average precipitation0.08 in
Chance of precipitation23%
Record high92° (1999)
Record low46° (1997)
Sat, 0579° / 61°0.04
79 °
Rockford, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high79°
Average low61°
Average precipitation0.04 in
Chance of precipitation20%
Record high91° (2007)
Record low46° (1974)
Sun, 0679° / 61°0.05
79 °
Rockford, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high79°
Average low61°
Average precipitation0.05 in
Chance of precipitation20%
Record high92° (1990)
Record low46° (1988)
Mon, 0778° / 61°0.1
78 °
Rockford, Monday, 7 September
Climate normal for this date — 60-year average.
Average high78°
Average low61°
Average precipitation0.1 in
Chance of precipitation30%
Record high91° (2002)
Record low44° (1988)
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 Rockford, 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 Rockford, 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.