Monthly outlook for Rochester, MN: average high 80°, average low 60.6°. That is 1.5° above the climate normal for August. Precipitation is expected on 8 days (about 3.2 inches), against a normal of 5 days and 2.1 inches. The warmest day looks like 11 August (86.7°), the coolest 23 August (43.8°).
80°/60.6°
Average high / low
+1.5°
Above normal
8 / 5
Wet days / normal
3.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
81.1°
77.6°
+2°
18 August – 27 August
78°
77°
+0.5°
28 August – 6 September
at normal
75.7°
—
August records over 66 years
98.1°16 August 1988All-time high
41.9°21 August 2004All-time low
Sun, 0981° / 64°1.87
81 °
Rochester, Sunday, 9 August
Heavy rain. High 81°, low 64°.
Pressure29.80 inHg
Wind5.7 mph SE
Humidity74%
Visibility6.2 mi
Dew point70°
Mon, 1086° / 68°0
86 °
Rochester, Monday, 10 August
Overcast. High 86°, low 68°.
Pressure29.85 inHg
Wind10 mph E
Humidity70%
Visibility6.2 mi
Dew point71°
Tue, 1187° / 69°0.21
87 °
Rochester, Tuesday, 11 August
Rain. High 87°, low 69°.
Pressure29.80 inHg
Wind3.2 mph NE
Humidity70%
Visibility6.2 mi
Dew point72°
Wed, 1285° / 62°0.07
85 °
Rochester, Wednesday, 12 August
Light rain. High 85°, low 62°.
Pressure29.85 inHg
Wind6.2 mph E
Humidity49%
Visibility6.2 mi
Dew point61°
Thu, 1376° / 58°0.15
76 °
Rochester, Thursday, 13 August
Rain. High 76°, low 58°.
Pressure30.00 inHg
Wind10.2 mph NE
Humidity44%
Visibility—
Dew point48°
Fri, 1476° / 53°0
76 °
Rochester, Friday, 14 August
Clear. High 76°, low 53°.
Pressure30.21 inHg
Wind6.2 mph S
Humidity45%
Visibility—
Dew point49°
Sat, 1577° / 58°0
77 °
Rochester, Saturday, 15 August
Overcast. High 77°, low 58°.
Pressure30.21 inHg
Wind14.8 mph S
Humidity57%
Visibility—
Dew point57°
Sun, 1681° / 64°0
81 °
Rochester, Sunday, 16 August
Overcast. High 81°, low 64°.
Pressure30.06 inHg
Wind14.1 mph S
Humidity64%
Visibility—
Dew point64°
Mon, 1783° / 68°0.2
83 °
Rochester, Monday, 17 August
Light rain. High 83°, low 68°.
Pressure29.97 inHg
Wind7.3 mph NE
Humidity74%
Visibility—
Dew point69°
Tue, 1885° / 64°0.42
85 °
Rochester, Tuesday, 18 August
Rain. High 85°, low 64°.
Pressure30.00 inHg
Wind11.4 mph SW
Humidity55%
Visibility—
Dew point64°
Wed, 1976° / 64°0.2
76 °
Rochester, Wednesday, 19 August
Light rain. High 76°, low 64°.
Pressure29.88 inHg
Wind11.4 mph SE
Humidity78%
Visibility—
Dew point67°
Thu, 2083° / 60°0
83 °
Rochester, Thursday, 20 August
Mostly clear. High 83°, low 60°.
Pressure29.97 inHg
Wind6.2 mph N
Humidity54%
Visibility—
Dew point58°
Fri, 2184° / 62°0.01
84 °
Rochester, Friday, 21 August
Light rain. High 84°, low 62°.
Pressure29.94 inHg
Wind11.9 mph S
Humidity53%
Visibility—
Dew point60°
Sat, 2271° / 54°0.08
71 °
Rochester, Saturday, 22 August
Light rain. High 71°, low 54°.
Pressure30.09 inHg
Wind15.3 mph NE
Humidity42%
Visibility—
Dew point43°
Sun, 2369° / 44°0
69 °
Rochester, Sunday, 23 August
Mostly clear. High 69°, low 44°.
Pressure30.24 inHg
Wind8.5 mph NE
Humidity37%
Visibility—
Dew point36°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2477° / 62°0.17
77 °
Rochester, Monday, 24 August
Climate normal for this date — 60-year average.
Average high77°
Average low62°
Average precipitation0.17 in
Chance of precipitation30%
Record high91° (2020)
Record low46° (1987)
Tue, 2578° / 62°0.12
78 °
Rochester, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.12 in
Chance of precipitation35%
Record high91° (2020)
Record low48° (1979)
Wed, 2678° / 63°0.13
78 °
Rochester, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.13 in
Chance of precipitation37%
Record high92° (2024)
Record low49° (1964)
Thu, 2777° / 62°0.13
77 °
Rochester, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high77°
Average low62°
Average precipitation0.13 in
Chance of precipitation35%
Record high91° (2013)
Record low49° (1971)
Fri, 2877° / 62°0.13
77 °
Rochester, Friday, 28 August
Climate normal for this date — 60-year average.
Average high77°
Average low62°
Average precipitation0.13 in
Chance of precipitation40%
Record high91° (1984)
Record low43° (1986)
Sat, 2977° / 61°0.12
77 °
Rochester, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.12 in
Chance of precipitation25%
Record high90° (2012)
Record low48° (1965)
Sun, 3076° / 61°0.1
76 °
Rochester, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high76°
Average low61°
Average precipitation0.1 in
Chance of precipitation30%
Record high94° (2012)
Record low49° (2009)
Mon, 3176° / 60°0.07
76 °
Rochester, Monday, 31 August
Climate normal for this date — 60-year average.
Average high76°
Average low60°
Average precipitation0.07 in
Chance of precipitation22%
Record high87° (1960)
Record low44° (2009)
Tue, 0176° / 60°0.05
76 °
Rochester, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high76°
Average low60°
Average precipitation0.05 in
Chance of precipitation22%
Record high90° (2011)
Record low44° (1974)
Wed, 0276° / 60°0.09
76 °
Rochester, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high76°
Average low60°
Average precipitation0.09 in
Chance of precipitation35%
Record high92° (2023)
Record low46° (1974)
Thu, 0375° / 60°0.15
75 °
Rochester, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high75°
Average low60°
Average precipitation0.15 in
Chance of precipitation32%
Record high93° (2023)
Record low41° (1974)
Fri, 0475° / 59°0.13
75 °
Rochester, Friday, 4 September
Climate normal for this date — 60-year average.
Average high75°
Average low59°
Average precipitation0.13 in
Chance of precipitation28%
Record high92° (2023)
Record low42° (1974)
Sat, 0575° / 59°0.1
75 °
Rochester, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high75°
Average low59°
Average precipitation0.1 in
Chance of precipitation28%
Record high89° (2023)
Record low40° (1962)
Sun, 0674° / 59°0.11
74 °
Rochester, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high74°
Average low59°
Average precipitation0.11 in
Chance of precipitation27%
Record high88° (1960)
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 Rochester, MN 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, MN 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.