Monthly outlook for South Wayne, WI: average high 79.9°, average low 64.8°. That is 0° above the climate normal for August. Precipitation is expected on 10 days (about 2.5 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 15 August (86.9°), the coolest 22 August (55.8°).
79.9°/64.8°
Average high / low
+0°
Above normal
10 / 5
Wet days / normal
2.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
79.6°
80°
-0.2°
19 August – 28 August
80.5°
80°
+0.3°
29 August – 7 September
at normal
77.9°
—
August records over 66 years
99.7°23 August 2023All-time high
46.2°28 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Gratiot (8 mi).
Mon, 1085° / 70°0.06
85 °
South Wayne, Monday, 10 August
Light rain. High 85°, low 70°.
Pressure29.94 inHg
Wind9 mph N
Humidity74%
Visibility6.2 mi
Dew point70°
Tue, 1183° / 68°0.46
83 °
South Wayne, Tuesday, 11 August
Heavy rain. High 83°, low 68°.
Pressure29.80 inHg
Wind5.9 mph E
Humidity80%
Visibility6.2 mi
Dew point70°
Wed, 1280° / 66°0.02
80 °
South Wayne, Wednesday, 12 August
Light rain. High 80°, low 66°.
Pressure29.91 inHg
Wind0.5 mph W
Humidity72%
Visibility6.2 mi
Dew point69°
Thu, 1376° / 65°0.15
76 °
South Wayne, Thursday, 13 August
Light rain. High 76°, low 65°.
Pressure29.97 inHg
Wind9.5 mph SE
Humidity68%
Visibility6.2 mi
Dew point65°
Fri, 1475° / 66°0.23
75 °
South Wayne, Friday, 14 August
Light rain. High 75°, low 66°.
Pressure30.03 inHg
Wind14.2 mph E
Humidity86%
Visibility—
Dew point67°
Sat, 1587° / 67°0.66
87 °
South Wayne, Saturday, 15 August
Rain. High 87°, low 67°.
Pressure29.88 inHg
Wind12.9 mph E
Humidity79%
Visibility—
Dew point73°
Sun, 1673° / 65°0.1
73 °
South Wayne, Sunday, 16 August
Light rain. High 73°, low 65°.
Pressure30.00 inHg
Wind15.3 mph NW
Humidity84%
Visibility—
Dew point64°
Mon, 1770° / 61°0.24
70 °
South Wayne, Monday, 17 August
Rain. High 70°, low 61°.
Pressure30.03 inHg
Wind13.6 mph E
Humidity94%
Visibility—
Dew point62°
Tue, 1884° / 67°0.07
84 °
South Wayne, Tuesday, 18 August
Light rain. High 84°, low 67°.
Pressure29.85 inHg
Wind12.1 mph W
Humidity70%
Visibility—
Dew point69°
Wed, 1981° / 65°0
81 °
South Wayne, Wednesday, 19 August
Overcast. High 81°, low 65°.
Pressure30.03 inHg
Wind7.4 mph SE
Humidity66%
Visibility—
Dew point66°
Thu, 2085° / 67°0.01
85 °
South Wayne, Thursday, 20 August
Light rain. High 85°, low 67°.
Pressure29.83 inHg
Wind11.7 mph S
Humidity73%
Visibility—
Dew point71°
Fri, 2175° / 63°0.14
75 °
South Wayne, Friday, 21 August
Rain. High 75°, low 63°.
Pressure29.94 inHg
Wind11.9 mph NE
Humidity73%
Visibility—
Dew point64°
Sat, 2278° / 56°0
78 °
South Wayne, Saturday, 22 August
Clear. High 78°, low 56°.
Pressure30.03 inHg
Wind6.5 mph NE
Humidity57%
Visibility—
Dew point57°
Sun, 2382° / 61°0.01
82 °
South Wayne, Sunday, 23 August
Light rain. High 82°, low 61°.
Pressure29.97 inHg
Wind8.4 mph W
Humidity68%
Visibility—
Dew point66°
Mon, 2483° / 67°0.01
83 °
South Wayne, Monday, 24 August
Light rain. High 83°, low 67°.
Pressure30.00 inHg
Wind9.3 mph NW
Humidity64%
Visibility—
Dew point68°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2580° / 64°0.1
80 °
South Wayne, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.1 in
Chance of precipitation22%
Record high92° (2003)
Record low52° (2025)
Wed, 2680° / 64°0.16
80 °
South Wayne, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.16 in
Chance of precipitation33%
Record high94° (2003)
Record low50° (1964)
Thu, 2780° / 65°0.12
80 °
South Wayne, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high80°
Average low65°
Average precipitation0.12 in
Chance of precipitation28%
Record high94° (2024)
Record low51° (1968)
Fri, 2880° / 64°0.17
80 °
South Wayne, Friday, 28 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.17 in
Chance of precipitation33%
Record high95° (1984)
Record low46° (1986)
Sat, 2980° / 63°0.15
80 °
South Wayne, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.15 in
Chance of precipitation32%
Record high94° (1984)
Record low47° (1965)
Sun, 3079° / 63°0.06
79 °
South Wayne, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.06 in
Chance of precipitation25%
Record high94° (2013)
Record low52° (1974)
Mon, 3178° / 62°0.07
78 °
South Wayne, Monday, 31 August
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.07 in
Chance of precipitation20%
Record high92° (2000)
Record low47° (2009)
Tue, 0178° / 62°0.09
78 °
South Wayne, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.09 in
Chance of precipitation27%
Record high92° (2011)
Record low48° (1967)
Wed, 0278° / 62°0.06
78 °
South Wayne, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.06 in
Chance of precipitation22%
Record high91° (1960)
Record low49° (1974)
Thu, 0378° / 62°0.12
78 °
South Wayne, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.12 in
Chance of precipitation35%
Record high93° (2023)
Record low47° (1974)
Fri, 0477° / 61°0.09
77 °
South Wayne, Friday, 4 September
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.09 in
Chance of precipitation30%
Record high92° (2023)
Record low45° (2025)
Sat, 0577° / 60°0.07
77 °
South Wayne, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high77°
Average low60°
Average precipitation0.07 in
Chance of precipitation22%
Record high89° (2023)
Record low48° (1962)
Sun, 0677° / 60°0.08
77 °
South Wayne, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high77°
Average low60°
Average precipitation0.08 in
Chance of precipitation27%
Record high92° (1990)
Record low46° (1962)
Mon, 0777° / 60°0.14
77 °
South Wayne, Monday, 7 September
Climate normal for this date — 60-year average.
Average high77°
Average low60°
Average precipitation0.14 in
Chance of precipitation27%
Record high91° (1960)
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 South Wayne, WI 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 South Wayne, WI 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.