Monthly outlook for Plymouth, MN: average high 85.7°, average low 63.9°. That is 3.8° above the climate normal for August. Precipitation is expected on 8 days (about 0.8 inches), against a normal of 5 days and 2.1 inches. The warmest day looks like 19 August (100.9°), the coolest 14 August (58.5°).
85.7°/63.9°
Average high / low
+3.8°
Above normal
8 / 5
Wet days / normal
0.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
84.4°
79.2°
+2.9°
19 August – 28 August
87.8°
78.5°
+5.1°
29 August – 7 September
at normal
76.7°
—
August records over 66 years
99.1°23 August 2023All-time high
45.3°21 August 2004All-time low
Climate normals and records are computed from the nearest reference point — Minneapolis (10 mi).
Mon, 1090° / 60°0
90 °
Plymouth, Monday, 10 August
Overcast. High 90°, low 60°.
Pressure29.88 inHg
Wind6.6 mph E
Humidity30%
Visibility6.2 mi
Dew point51°
Tue, 1194° / 67°0.1
94 °
Plymouth, Tuesday, 11 August
Rain. High 94°, low 67°.
Pressure29.80 inHg
Wind3.4 mph N
Humidity43%
Visibility6.2 mi
Dew point62°
Wed, 1287° / 64°0
87 °
Plymouth, Wednesday, 12 August
Mostly clear. High 87°, low 64°.
Pressure29.91 inHg
Wind5.8 mph N
Humidity24%
Visibility6.2 mi
Dew point44°
Thu, 1380° / 61°0
80 °
Plymouth, Thursday, 13 August
Overcast. High 80°, low 61°.
Pressure30.06 inHg
Wind6.1 mph NE
Humidity31%
Visibility—
Dew point41°
Fri, 1483° / 59°0
83 °
Plymouth, Friday, 14 August
Overcast. High 83°, low 59°.
Pressure30.15 inHg
Wind9.1 mph S
Humidity27%
Visibility—
Dew point40°
Sat, 1567° / 61°0
67 °
Plymouth, Saturday, 15 August
Overcast. High 67°, low 61°.
Pressure30.21 inHg
Wind8.7 mph SE
Humidity55%
Visibility—
Dew point50°
Sun, 1690° / 62°0
90 °
Plymouth, Sunday, 16 August
Partly cloudy. High 90°, low 62°.
Pressure30.06 inHg
Wind10.5 mph NW
Humidity37%
Visibility—
Dew point53°
Mon, 1780° / 62°0
80 °
Plymouth, Monday, 17 August
Overcast. High 80°, low 62°.
Pressure30.09 inHg
Wind7.9 mph SE
Humidity31%
Visibility—
Dew point45°
Tue, 1891° / 66°0.09
91 °
Plymouth, Tuesday, 18 August
Light rain. High 91°, low 66°.
Pressure29.85 inHg
Wind12.9 mph S
Humidity56%
Visibility—
Dew point64°
Wed, 19101° / 73°0.04
101 °
Plymouth, Wednesday, 19 August
Light rain. High 101°, low 73°.
Pressure29.77 inHg
Wind7.3 mph S
Humidity40%
Visibility—
Dew point64°
Thu, 2095° / 69°0.09
95 °
Plymouth, Thursday, 20 August
Light rain. High 95°, low 69°.
Pressure29.83 inHg
Wind16 mph NW
Humidity23%
Visibility—
Dew point46°
Fri, 2189° / 64°0
89 °
Plymouth, Friday, 21 August
Overcast. High 89°, low 64°.
Pressure29.97 inHg
Wind12.5 mph NE
Humidity38%
Visibility—
Dew point50°
Sat, 2289° / 65°0.07
89 °
Plymouth, Saturday, 22 August
Light rain. High 89°, low 65°.
Pressure29.80 inHg
Wind12.3 mph NE
Humidity54%
Visibility—
Dew point63°
Sun, 2376° / 64°0.09
76 °
Plymouth, Sunday, 23 August
Light rain. High 76°, low 64°.
Pressure29.94 inHg
Wind11.6 mph NE
Humidity67%
Visibility—
Dew point59°
Mon, 2478° / 63°0.07
78 °
Plymouth, Monday, 24 August
Light rain. High 78°, low 63°.
Pressure30.06 inHg
Wind8.7 mph E
Humidity76%
Visibility—
Dew point61°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2579° / 64°0.14
79 °
Plymouth, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high79°
Average low64°
Average precipitation0.14 in
Chance of precipitation32%
Record high93° (2013)
Record low50° (1979)
Wed, 2679° / 63°0.22
79 °
Plymouth, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.22 in
Chance of precipitation42%
Record high93° (2013)
Record low51° (1971)
Thu, 2779° / 63°0.15
79 °
Plymouth, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.15 in
Chance of precipitation32%
Record high92° (2013)
Record low48° (1971)
Fri, 2878° / 63°0.1
78 °
Plymouth, Friday, 28 August
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.1 in
Chance of precipitation32%
Record high92° (1984)
Record low46° (1986)
Sat, 2978° / 62°0.1
78 °
Plymouth, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.1 in
Chance of precipitation27%
Record high93° (2013)
Record low51° (1976)
Sun, 3077° / 62°0.1
77 °
Plymouth, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high77°
Average low62°
Average precipitation0.1 in
Chance of precipitation32%
Record high96° (2012)
Record low50° (2009)
Mon, 3177° / 61°0.1
77 °
Plymouth, Monday, 31 August
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.1 in
Chance of precipitation30%
Record high89° (1960)
Record low49° (1967)
Tue, 0177° / 61°0.09
77 °
Plymouth, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.09 in
Chance of precipitation28%
Record high93° (2011)
Record low46° (1974)
Wed, 0277° / 62°0.09
77 °
Plymouth, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high77°
Average low62°
Average precipitation0.09 in
Chance of precipitation33%
Record high94° (2023)
Record low47° (1974)
Thu, 0376° / 61°0.13
76 °
Plymouth, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high76°
Average low61°
Average precipitation0.13 in
Chance of precipitation40%
Record high98° (2023)
Record low41° (1974)
Fri, 0476° / 60°0.14
76 °
Plymouth, Friday, 4 September
Climate normal for this date — 60-year average.
Average high76°
Average low60°
Average precipitation0.14 in
Chance of precipitation27%
Record high98° (2023)
Record low46° (1974)
Sat, 0576° / 60°0.09
76 °
Plymouth, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high76°
Average low60°
Average precipitation0.09 in
Chance of precipitation27%
Record high91° (2023)
Record low44° (1962)
Sun, 0676° / 60°0.11
76 °
Plymouth, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high76°
Average low60°
Average precipitation0.11 in
Chance of precipitation30%
Record high91° (1960)
Record low46° (2025)
Mon, 0775° / 59°0.07
75 °
Plymouth, Monday, 7 September
Climate normal for this date — 60-year average.
Average high75°
Average low59°
Average precipitation0.07 in
Chance of precipitation33%
Record high93° (1976)
Record low44° (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 Plymouth, 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 Plymouth, 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.