Monthly outlook for Thiensville, WI: average high 77.9°, average low 64.4°. That is 0.4° above the climate normal for August. Precipitation is expected on 3 days (about 2.0 inches), against a normal of 5 days and 1.9 inches. The warmest day looks like 20 August (93.7°), the coolest 14 August (56.8°).
77.9°/64.4°
Average high / low
+0.4°
Above normal
3 / 5
Wet days / normal
2.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
75.9°
77.3°
-0.8°
19 August – 28 August
81.2°
77°
+2.3°
29 August – 7 September
at normal
75.3°
—
August records over 66 years
96.8°23 August 2023All-time high
49.6°28 August 1986All-time low
Mon, 1086° / 69°0.01
86 °
Thiensville, Monday, 10 August
Light rain. High 86°, low 69°.
Pressure29.91 inHg
Wind1.5 mph E
Humidity68%
Visibility6.2 mi
Dew point68°
Tue, 1179° / 66°1.1
79 °
Thiensville, Tuesday, 11 August
Heavy rain. High 79°, low 66°.
Pressure29.85 inHg
Wind5.7 mph SE
Humidity92%
Visibility6.2 mi
Dew point67°
Wed, 1281° / 67°0
81 °
Thiensville, Wednesday, 12 August
Partly cloudy. High 81°, low 67°.
Pressure29.83 inHg
Wind7.6 mph NW
Humidity60%
Visibility6.2 mi
Dew point64°
Thu, 1372° / 60°0
72 °
Thiensville, Thursday, 13 August
Overcast. High 72°, low 60°.
Pressure30.03 inHg
Wind7.9 mph NE
Humidity49%
Visibility—
Dew point50°
Fri, 1470° / 57°0
70 °
Thiensville, Friday, 14 August
Partly cloudy. High 70°, low 57°.
Pressure30.21 inHg
Wind9.6 mph E
Humidity63%
Visibility—
Dew point55°
Sat, 1573° / 60°0
73 °
Thiensville, Saturday, 15 August
Overcast. High 73°, low 60°.
Pressure30.24 inHg
Wind9.2 mph SE
Humidity55%
Visibility—
Dew point54°
Sun, 1670° / 63°0.03
70 °
Thiensville, Sunday, 16 August
Light rain. High 70°, low 63°.
Pressure30.09 inHg
Wind4.5 mph S
Humidity80%
Visibility—
Dew point60°
Mon, 1777° / 63°0.01
77 °
Thiensville, Monday, 17 August
Light rain. High 77°, low 63°.
Pressure30.09 inHg
Wind8.3 mph E
Humidity60%
Visibility—
Dew point60°
Tue, 1877° / 61°0
77 °
Thiensville, Tuesday, 18 August
Overcast. High 77°, low 61°.
Pressure30.03 inHg
Wind7 mph SE
Humidity49%
Visibility—
Dew point55°
Wed, 1984° / 65°0.28
84 °
Thiensville, Wednesday, 19 August
Rain. High 84°, low 65°.
Pressure29.88 inHg
Wind11.4 mph S
Humidity64%
Visibility—
Dew point67°
Thu, 2094° / 73°0
94 °
Thiensville, Thursday, 20 August
Overcast. High 94°, low 73°.
Pressure29.77 inHg
Wind8.8 mph NW
Humidity59%
Visibility—
Dew point72°
Fri, 2181° / 68°0
81 °
Thiensville, Friday, 21 August
Light rain. High 81°, low 68°.
Pressure29.97 inHg
Wind11.2 mph N
Humidity57%
Visibility—
Dew point63°
Sat, 2281° / 66°0.02
81 °
Thiensville, Saturday, 22 August
Light rain. High 81°, low 66°.
Pressure29.91 inHg
Wind10.9 mph E
Humidity69%
Visibility—
Dew point64°
Sun, 2376° / 66°0.01
76 °
Thiensville, Sunday, 23 August
Light rain. High 76°, low 66°.
Pressure29.88 inHg
Wind13.5 mph N
Humidity75%
Visibility—
Dew point64°
Mon, 2472° / 66°0.02
72 °
Thiensville, Monday, 24 August
Light rain. High 72°, low 66°.
Pressure30.12 inHg
Wind13 mph E
Humidity80%
Visibility—
Dew point64°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2577° / 66°0.09
77 °
Thiensville, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high77°
Average low66°
Average precipitation0.09 in
Chance of precipitation27%
Record high89° (2021)
Record low52° (2025)
Wed, 2678° / 66°0.15
78 °
Thiensville, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high78°
Average low66°
Average precipitation0.15 in
Chance of precipitation35%
Record high92° (2020)
Record low51° (2025)
Thu, 2778° / 66°0.13
78 °
Thiensville, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high78°
Average low66°
Average precipitation0.13 in
Chance of precipitation42%
Record high91° (1973)
Record low53° (2025)
Fri, 2877° / 65°0.11
77 °
Thiensville, Friday, 28 August
Climate normal for this date — 60-year average.
Average high77°
Average low65°
Average precipitation0.11 in
Chance of precipitation37%
Record high91° (2021)
Record low50° (1986)
Sat, 2977° / 65°0.1
77 °
Thiensville, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high77°
Average low65°
Average precipitation0.1 in
Chance of precipitation33%
Record high88° (1983)
Record low51° (1965)
Sun, 3076° / 65°0.07
76 °
Thiensville, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high76°
Average low65°
Average precipitation0.07 in
Chance of precipitation35%
Record high88° (2013)
Record low53° (2023)
Mon, 3175° / 64°0.04
75 °
Thiensville, Monday, 31 August
Climate normal for this date — 60-year average.
Average high75°
Average low64°
Average precipitation0.04 in
Chance of precipitation18%
Record high87° (1960)
Record low52° (2009)
Tue, 0175° / 64°0.07
75 °
Thiensville, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high75°
Average low64°
Average precipitation0.07 in
Chance of precipitation30%
Record high86° (1960)
Record low54° (1994)
Wed, 0276° / 64°0.06
76 °
Thiensville, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high76°
Average low64°
Average precipitation0.06 in
Chance of precipitation27%
Record high89° (2011)
Record low52° (2017)
Thu, 0376° / 64°0.09
76 °
Thiensville, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high76°
Average low64°
Average precipitation0.09 in
Chance of precipitation23%
Record high93° (2023)
Record low50° (1974)
Fri, 0475° / 63°0.07
75 °
Thiensville, Friday, 4 September
Climate normal for this date — 60-year average.
Average high75°
Average low63°
Average precipitation0.07 in
Chance of precipitation27%
Record high89° (2023)
Record low45° (2025)
Sat, 0574° / 62°0.08
74 °
Thiensville, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high74°
Average low62°
Average precipitation0.08 in
Chance of precipitation25%
Record high85° (2023)
Record low48° (2019)
Sun, 0675° / 63°0.08
75 °
Thiensville, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high75°
Average low63°
Average precipitation0.08 in
Chance of precipitation35%
Record high88° (1990)
Record low48° (2025)
Mon, 0774° / 62°0.1
74 °
Thiensville, Monday, 7 September
Climate normal for this date — 60-year average.
Average high74°
Average low62°
Average precipitation0.1 in
Chance of precipitation37%
Record high87° (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 Thiensville, 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 Thiensville, 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.