Monthly outlook for Marion, MN: average high 79.5°, average low 60.2°. That is 1.2° above the climate normal for August. Precipitation is expected on 8 days (about 2.9 inches), against a normal of 5 days and 2.1 inches. The warmest day looks like 10 August (85.9°), the coolest 23 August (43.1°).
79.5°/60.2°
Average high / low
+1.2°
Above normal
8 / 5
Wet days / normal
2.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
80.7°
77.6°
+1.7°
18 August – 27 August
77.6°
77°
+0.3°
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
Climate normals and records are computed from the nearest reference point — Rochester (8 mi).
Sun, 0980° / 64°1.64
80 °
Marion, Sunday, 9 August
Heavy rain. High 80°, low 64°.
Pressure29.80 inHg
Wind6.1 mph SE
Humidity74%
Visibility6.2 mi
Dew point70°
Mon, 1086° / 68°0
86 °
Marion, Monday, 10 August
Overcast. High 86°, low 68°.
Pressure29.85 inHg
Wind10 mph E
Humidity68%
Visibility6.2 mi
Dew point71°
Tue, 1186° / 69°0.22
86 °
Marion, Tuesday, 11 August
Rain. High 86°, low 69°.
Pressure29.80 inHg
Wind2.9 mph E
Humidity69%
Visibility6.2 mi
Dew point72°
Wed, 1285° / 62°0.06
85 °
Marion, Wednesday, 12 August
Light rain. High 85°, low 62°.
Pressure29.85 inHg
Wind6.2 mph E
Humidity47%
Visibility6.2 mi
Dew point60°
Thu, 1375° / 58°0.17
75 °
Marion, Thursday, 13 August
Rain. High 75°, low 58°.
Pressure30.00 inHg
Wind10.2 mph NE
Humidity44%
Visibility—
Dew point48°
Fri, 1476° / 53°0
76 °
Marion, Friday, 14 August
Clear. High 76°, low 53°.
Pressure30.21 inHg
Wind5.8 mph SW
Humidity44%
Visibility—
Dew point49°
Sat, 1577° / 57°0
77 °
Marion, Saturday, 15 August
Overcast. High 77°, low 57°.
Pressure30.21 inHg
Wind14.5 mph S
Humidity55%
Visibility—
Dew point56°
Sun, 1681° / 63°0
81 °
Marion, Sunday, 16 August
Partly cloudy. High 81°, low 63°.
Pressure30.06 inHg
Wind13.9 mph S
Humidity62%
Visibility—
Dew point63°
Mon, 1782° / 67°0.16
82 °
Marion, Monday, 17 August
Light rain. High 82°, low 67°.
Pressure29.97 inHg
Wind8.4 mph N
Humidity76%
Visibility—
Dew point69°
Tue, 1885° / 64°0.38
85 °
Marion, Tuesday, 18 August
Rain. High 85°, low 64°.
Pressure30.00 inHg
Wind11.2 mph SW
Humidity54%
Visibility—
Dew point63°
Wed, 1975° / 64°0.2
75 °
Marion, Wednesday, 19 August
Light rain. High 75°, low 64°.
Pressure29.91 inHg
Wind11.3 mph SE
Humidity79%
Visibility—
Dew point67°
Thu, 2082° / 60°0
82 °
Marion, Thursday, 20 August
Mostly clear. High 82°, low 60°.
Pressure29.97 inHg
Wind6.9 mph N
Humidity53%
Visibility—
Dew point57°
Fri, 2183° / 61°0.02
83 °
Marion, Friday, 21 August
Light rain. High 83°, low 61°.
Pressure29.94 inHg
Wind11.5 mph S
Humidity54%
Visibility—
Dew point60°
Sat, 2270° / 53°0.07
70 °
Marion, Saturday, 22 August
Light rain. High 70°, low 53°.
Pressure30.09 inHg
Wind15.1 mph NE
Humidity42%
Visibility—
Dew point43°
Sun, 2369° / 43°0
69 °
Marion, Sunday, 23 August
Mostly clear. High 69°, low 43°.
Pressure30.24 inHg
Wind8.4 mph NE
Humidity36%
Visibility—
Dew point35°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2477° / 62°0.17
77 °
Marion, 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 °
Marion, 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 °
Marion, 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 °
Marion, 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 °
Marion, 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 °
Marion, 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 °
Marion, 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 °
Marion, 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 °
Marion, 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 °
Marion, 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 °
Marion, 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 °
Marion, 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 °
Marion, 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 °
Marion, 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 Marion, 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 Marion, 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.