Monthly outlook for Wauwatosa, WI: average high 78.7°, average low 64.3°. That is 0.7° above the climate normal for August. Precipitation is expected on 3 days (about 2.6 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 20 August (95.1°), the coolest 14 August (56°).
78.7°/64.3°
Average high / low
+0.7°
Above normal
3 / 5
Wet days / normal
2.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
76.3°
77.7°
-0.8°
19 August – 28 August
82.8°
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 (3 mi).
Mon, 1085° / 69°0.03
85 °
Wauwatosa, Monday, 10 August
Light rain. High 85°, low 69°.
Pressure29.91 inHg
Wind1.9 mph SE
Humidity75%
Visibility6.2 mi
Dew point68°
Tue, 1180° / 65°1.3
80 °
Wauwatosa, Tuesday, 11 August
Heavy rain. High 80°, low 65°.
Pressure29.85 inHg
Wind4.5 mph S
Humidity91%
Visibility6.2 mi
Dew point67°
Wed, 1281° / 67°0
81 °
Wauwatosa, Wednesday, 12 August
Overcast. High 81°, low 67°.
Pressure29.83 inHg
Wind7.7 mph NW
Humidity59%
Visibility6.2 mi
Dew point65°
Thu, 1372° / 60°0
72 °
Wauwatosa, Thursday, 13 August
Overcast. High 72°, low 60°.
Pressure30.03 inHg
Wind6.9 mph NE
Humidity51%
Visibility—
Dew point51°
Fri, 1470° / 56°0
70 °
Wauwatosa, Friday, 14 August
Partly cloudy. High 70°, low 56°.
Pressure30.21 inHg
Wind9.1 mph E
Humidity62%
Visibility—
Dew point55°
Sat, 1574° / 59°0
74 °
Wauwatosa, Saturday, 15 August
Overcast. High 74°, low 59°.
Pressure30.24 inHg
Wind9.4 mph E
Humidity57%
Visibility—
Dew point56°
Sun, 1670° / 63°0.01
70 °
Wauwatosa, Sunday, 16 August
Light rain. High 70°, low 63°.
Pressure30.12 inHg
Wind5.4 mph S
Humidity79%
Visibility—
Dew point60°
Mon, 1776° / 63°0.02
76 °
Wauwatosa, Monday, 17 August
Light rain. High 76°, low 63°.
Pressure30.09 inHg
Wind7.6 mph E
Humidity66%
Visibility—
Dew point63°
Tue, 1878° / 60°0
78 °
Wauwatosa, Tuesday, 18 August
Overcast. High 78°, low 60°.
Pressure30.03 inHg
Wind5.7 mph S
Humidity52%
Visibility—
Dew point56°
Wed, 1986° / 65°0.3
86 °
Wauwatosa, Wednesday, 19 August
Rain. High 86°, low 65°.
Pressure29.88 inHg
Wind12.2 mph S
Humidity64%
Visibility—
Dew point67°
Thu, 2095° / 74°0
95 °
Wauwatosa, Thursday, 20 August
Overcast. High 95°, low 74°.
Pressure29.77 inHg
Wind6.9 mph NW
Humidity56%
Visibility—
Dew point72°
Fri, 2181° / 68°0
81 °
Wauwatosa, Friday, 21 August
Clear. High 81°, low 68°.
Pressure29.97 inHg
Wind10.1 mph NE
Humidity58%
Visibility—
Dew point63°
Sat, 2285° / 66°0.03
85 °
Wauwatosa, Saturday, 22 August
Light rain. High 85°, low 66°.
Pressure29.88 inHg
Wind10.7 mph E
Humidity65%
Visibility—
Dew point64°
Sun, 2378° / 66°0
78 °
Wauwatosa, Sunday, 23 August
Mostly clear. High 78°, low 66°.
Pressure29.85 inHg
Wind12.4 mph NE
Humidity70%
Visibility—
Dew point65°
Mon, 2471° / 66°0.01
71 °
Wauwatosa, Monday, 24 August
Light rain. High 71°, low 66°.
Pressure30.09 inHg
Wind11.4 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 °
Wauwatosa, 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 °
Wauwatosa, 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 °
Wauwatosa, 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 °
Wauwatosa, 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 °
Wauwatosa, 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 °
Wauwatosa, 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 °
Wauwatosa, 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 °
Wauwatosa, 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 °
Wauwatosa, 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 °
Wauwatosa, 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 °
Wauwatosa, 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 °
Wauwatosa, 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 °
Wauwatosa, 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 °
Wauwatosa, 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 Wauwatosa, 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 Wauwatosa, 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.