Monthly outlook for Rochester, IN: average high 78.9°, average low 61.6°. That is 0.6° below the climate normal for August. Precipitation is expected on 6 days (about 3.3 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 10 August (92.8°), the coolest 20 August (55.1°).
78.9°/61.6°
Average high / low
−0.6°
Below normal
6 / 5
Wet days / normal
3.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
80.1°
80.1°
+0°
19 August – 28 August
76.9°
80.1°
-1.8°
29 August – 7 September
at normal
78.9°
—
August records over 66 years
95.7°17 August 1988All-time high
43.3°29 August 1986All-time low
Mon, 1093° / 72°1.27
93 °
Rochester, Monday, 10 August
Heavy rain. High 93°, low 72°.
Pressure29.94 inHg
Wind12.5 mph SW
Humidity71%
Visibility6.2 mi
Dew point73°
Tue, 1186° / 67°1.08
86 °
Rochester, Tuesday, 11 August
Heavy rain. High 86°, low 67°.
Pressure29.94 inHg
Wind7 mph SW
Humidity81%
Visibility6.2 mi
Dew point73°
Wed, 1281° / 67°0.43
81 °
Rochester, Wednesday, 12 August
Rain. High 81°, low 67°.
Pressure29.83 inHg
Wind6.1 mph NW
Humidity72%
Visibility6.2 mi
Dew point69°
Thu, 1377° / 62°0.21
77 °
Rochester, Thursday, 13 August
Light rain. High 77°, low 62°.
Pressure29.94 inHg
Wind8.5 mph N
Humidity67%
Visibility—
Dew point63°
Fri, 1475° / 63°0.01
75 °
Rochester, Friday, 14 August
Light rain. High 75°, low 63°.
Pressure30.12 inHg
Wind11.2 mph NE
Humidity64%
Visibility—
Dew point60°
Sat, 1573° / 58°0.01
73 °
Rochester, Saturday, 15 August
Light rain. High 73°, low 58°.
Pressure30.24 inHg
Wind13.3 mph SE
Humidity59%
Visibility—
Dew point56°
Sun, 1679° / 62°0.17
79 °
Rochester, Sunday, 16 August
Light rain. High 79°, low 62°.
Pressure29.94 inHg
Wind11.5 mph SE
Humidity80%
Visibility—
Dew point69°
Mon, 1773° / 61°0.01
73 °
Rochester, Monday, 17 August
Light rain. High 73°, low 61°.
Pressure30.09 inHg
Wind9.4 mph N
Humidity70%
Visibility—
Dew point61°
Tue, 1877° / 59°0
77 °
Rochester, Tuesday, 18 August
Overcast. High 77°, low 59°.
Pressure29.94 inHg
Wind8.1 mph S
Humidity67%
Visibility—
Dew point61°
Wed, 1977° / 61°0.02
77 °
Rochester, Wednesday, 19 August
Light rain. High 77°, low 61°.
Pressure29.77 inHg
Wind15.7 mph NW
Humidity65%
Visibility—
Dew point63°
Thu, 2073° / 55°0
73 °
Rochester, Thursday, 20 August
Overcast. High 73°, low 55°.
Pressure29.94 inHg
Wind10.5 mph N
Humidity63%
Visibility—
Dew point57°
Fri, 2179° / 58°0.01
79 °
Rochester, Friday, 21 August
Light rain. High 79°, low 58°.
Pressure29.85 inHg
Wind11.4 mph S
Humidity60%
Visibility—
Dew point61°
Sat, 2280° / 64°0.12
80 °
Rochester, Saturday, 22 August
Light rain. High 80°, low 64°.
Pressure29.77 inHg
Wind14.7 mph SW
Humidity68%
Visibility—
Dew point67°
Sun, 2374° / 58°0
74 °
Rochester, Sunday, 23 August
Clear. High 74°, low 58°.
Pressure30.12 inHg
Wind11.7 mph N
Humidity54%
Visibility—
Dew point54°
Mon, 2477° / 56°0
77 °
Rochester, Monday, 24 August
Clear. High 77°, low 56°.
Pressure30.21 inHg
Wind4.9 mph S
Humidity46%
Visibility—
Dew point51°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2580° / 63°0.07
80 °
Rochester, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.07 in
Chance of precipitation27%
Record high91° (2003)
Record low51° (2017)
Wed, 2681° / 64°0.11
81 °
Rochester, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.11 in
Chance of precipitation30%
Record high92° (2020)
Record low52° (2025)
Thu, 2781° / 65°0.12
81 °
Rochester, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.12 in
Chance of precipitation35%
Record high93° (2024)
Record low51° (2025)
Fri, 2880° / 64°0.13
80 °
Rochester, Friday, 28 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.13 in
Chance of precipitation38%
Record high90° (2022)
Record low47° (1986)
Sat, 2980° / 63°0.11
80 °
Rochester, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.11 in
Chance of precipitation38%
Record high91° (1991)
Record low43° (1986)
Sun, 3079° / 63°0.07
79 °
Rochester, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.07 in
Chance of precipitation37%
Record high91° (2024)
Record low47° (1986)
Mon, 3179° / 62°0.07
79 °
Rochester, Monday, 31 August
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.07 in
Chance of precipitation28%
Record high91° (2012)
Record low47° (2009)
Tue, 0179° / 62°0.15
79 °
Rochester, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.15 in
Chance of precipitation25%
Record high95° (2011)
Record low47° (1967)
Wed, 0279° / 62°0.07
79 °
Rochester, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.07 in
Chance of precipitation27%
Record high95° (2011)
Record low47° (1965)
Thu, 0379° / 62°0.08
79 °
Rochester, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.08 in
Chance of precipitation27%
Record high93° (2011)
Record low47° (1974)
Fri, 0478° / 61°0.07
78 °
Rochester, Friday, 4 September
Climate normal for this date — 60-year average.
Average high78°
Average low61°
Average precipitation0.07 in
Chance of precipitation27%
Record high91° (1999)
Record low47° (1997)
Sat, 0578° / 61°0.04
78 °
Rochester, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high78°
Average low61°
Average precipitation0.04 in
Chance of precipitation27%
Record high91° (2007)
Record low47° (1974)
Sun, 0678° / 61°0.07
78 °
Rochester, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high78°
Average low61°
Average precipitation0.07 in
Chance of precipitation25%
Record high91° (1990)
Record low47° (1962)
Mon, 0778° / 60°0.12
78 °
Rochester, Monday, 7 September
Climate normal for this date — 60-year average.
Average high78°
Average low60°
Average precipitation0.12 in
Chance of precipitation35%
Record high90° (2002)
Record low45° (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 Rochester, 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 Rochester, 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.