Monthly outlook for Hales Corners, WI: average high 78.6°, average low 63.7°. That is 0.6° above the climate normal for August. Precipitation is expected on 4 days (about 2.7 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 20 August (94.5°), the coolest 14 August (55.1°).
78.6°/63.7°
Average high / low
+0.6°
Above normal
4 / 5
Wet days / normal
2.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
76.1°
77.7°
-0.9°
19 August – 28 August
82.7°
77.5°
+2.9°
29 August – 7 September
at normal
75.8°
—
August records over 66 years
99.3°23 August 2023All-time high
49.5°28 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Milwaukee (9 mi).
Mon, 1085° / 69°0.04
85 °
Hales Corners, Monday, 10 August
Light rain. High 85°, low 69°.
Pressure29.94 inHg
Wind0.8 mph E
Humidity80%
Visibility6.2 mi
Dew point69°
Tue, 1181° / 64°1.3
81 °
Hales Corners, Tuesday, 11 August
Heavy rain. High 81°, low 64°.
Pressure29.83 inHg
Wind5.7 mph S
Humidity91%
Visibility6.2 mi
Dew point67°
Wed, 1281° / 66°0
81 °
Hales Corners, Wednesday, 12 August
Overcast. High 81°, low 66°.
Pressure29.83 inHg
Wind8.8 mph NW
Humidity62%
Visibility6.2 mi
Dew point66°
Thu, 1371° / 59°0
71 °
Hales Corners, Thursday, 13 August
Overcast. High 71°, low 59°.
Pressure30.06 inHg
Wind6.8 mph NE
Humidity54%
Visibility—
Dew point52°
Fri, 1470° / 55°0
70 °
Hales Corners, Friday, 14 August
Partly cloudy. High 70°, low 55°.
Pressure30.21 inHg
Wind9.5 mph E
Humidity61%
Visibility—
Dew point54°
Sat, 1574° / 58°0
74 °
Hales Corners, Saturday, 15 August
Overcast. High 74°, low 58°.
Pressure30.24 inHg
Wind9.7 mph E
Humidity57%
Visibility—
Dew point56°
Sun, 1670° / 63°0.01
70 °
Hales Corners, Sunday, 16 August
Light rain. High 70°, low 63°.
Pressure30.12 inHg
Wind6.5 mph S
Humidity80%
Visibility—
Dew point60°
Mon, 1775° / 62°0.02
75 °
Hales Corners, Monday, 17 August
Light rain. High 75°, low 62°.
Pressure30.09 inHg
Wind8.1 mph E
Humidity69%
Visibility—
Dew point63°
Tue, 1877° / 59°0
77 °
Hales Corners, Tuesday, 18 August
Overcast. High 77°, low 59°.
Pressure30.03 inHg
Wind5.6 mph S
Humidity54%
Visibility—
Dew point57°
Wed, 1986° / 65°0.34
86 °
Hales Corners, Wednesday, 19 August
Rain. High 86°, low 65°.
Pressure29.88 inHg
Wind13.5 mph S
Humidity66%
Visibility—
Dew point67°
Thu, 2095° / 73°0
95 °
Hales Corners, Thursday, 20 August
Overcast. High 95°, low 73°.
Pressure29.77 inHg
Wind6.5 mph NW
Humidity58%
Visibility—
Dew point73°
Fri, 2180° / 66°0
80 °
Hales Corners, Friday, 21 August
Mostly clear. High 80°, low 66°.
Pressure29.97 inHg
Wind10.6 mph NE
Humidity61%
Visibility—
Dew point64°
Sat, 2286° / 66°0.02
86 °
Hales Corners, Saturday, 22 August
Light rain. High 86°, low 66°.
Pressure29.88 inHg
Wind11.1 mph E
Humidity62%
Visibility—
Dew point64°
Sun, 2378° / 66°0
78 °
Hales Corners, Sunday, 23 August
Partly cloudy. High 78°, low 66°.
Pressure29.85 inHg
Wind12.8 mph NE
Humidity69%
Visibility—
Dew point66°
Mon, 2471° / 66°0
71 °
Hales Corners, Monday, 24 August
Overcast. High 71°, low 66°.
Pressure30.09 inHg
Wind11.9 mph NE
Humidity81%
Visibility—
Dew point64°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2578° / 66°0.09
78 °
Hales Corners, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high78°
Average low66°
Average precipitation0.09 in
Chance of precipitation27%
Record high92° (2021)
Record low53° (2025)
Wed, 2678° / 66°0.16
78 °
Hales Corners, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high78°
Average low66°
Average precipitation0.16 in
Chance of precipitation40%
Record high93° (2020)
Record low52° (2025)
Thu, 2778° / 66°0.11
78 °
Hales Corners, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high78°
Average low66°
Average precipitation0.11 in
Chance of precipitation35%
Record high94° (2024)
Record low55° (2025)
Fri, 2878° / 65°0.12
78 °
Hales Corners, Friday, 28 August
Climate normal for this date — 60-year average.
Average high78°
Average low65°
Average precipitation0.12 in
Chance of precipitation38%
Record high93° (2021)
Record low49° (1986)
Sat, 2977° / 65°0.1
77 °
Hales Corners, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high77°
Average low65°
Average precipitation0.1 in
Chance of precipitation27%
Record high89° (2022)
Record low51° (1965)
Sun, 3076° / 65°0.07
76 °
Hales Corners, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high76°
Average low65°
Average precipitation0.07 in
Chance of precipitation33%
Record high89° (2013)
Record low53° (2023)
Mon, 3176° / 64°0.04
76 °
Hales Corners, Monday, 31 August
Climate normal for this date — 60-year average.
Average high76°
Average low64°
Average precipitation0.04 in
Chance of precipitation13%
Record high87° (2012)
Record low51° (2009)
Tue, 0176° / 64°0.09
76 °
Hales Corners, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high76°
Average low64°
Average precipitation0.09 in
Chance of precipitation27%
Record high89° (2022)
Record low51° (2009)
Wed, 0276° / 64°0.05
76 °
Hales Corners, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high76°
Average low64°
Average precipitation0.05 in
Chance of precipitation28%
Record high89° (2011)
Record low50° (2017)
Thu, 0376° / 64°0.09
76 °
Hales Corners, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high76°
Average low64°
Average precipitation0.09 in
Chance of precipitation27%
Record high94° (2023)
Record low50° (1974)
Fri, 0475° / 63°0.07
75 °
Hales Corners, Friday, 4 September
Climate normal for this date — 60-year average.
Average high75°
Average low63°
Average precipitation0.07 in
Chance of precipitation28%
Record high91° (2023)
Record low47° (2025)
Sat, 0575° / 62°0.08
75 °
Hales Corners, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high75°
Average low62°
Average precipitation0.08 in
Chance of precipitation27%
Record high89° (2023)
Record low48° (2019)
Sun, 0675° / 63°0.08
75 °
Hales Corners, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high75°
Average low63°
Average precipitation0.08 in
Chance of precipitation35%
Record high89° (1990)
Record low48° (2017)
Mon, 0775° / 62°0.1
75 °
Hales Corners, Monday, 7 September
Climate normal for this date — 60-year average.
Average high75°
Average low62°
Average precipitation0.1 in
Chance of precipitation32%
Record high88° (1960)
Record low46° (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 Hales Corners, 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 Hales Corners, 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.