Monthly outlook for River Hills, WI: average high 75.3°, average low 63.2°. That is 1.1° below the climate normal for August. Precipitation is expected on 3 days (about 2.4 inches), against a normal of 5 days and 1.9 inches. The warmest day looks like 10 August (85.1°), the coolest 20 August (57.2°).
75.3°/63.2°
Average high / low
−1.1°
Below normal
3 / 5
Wet days / normal
2.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
76.9°
77.6°
-0.4°
18 August – 27 August
72.7°
77°
-2.4°
28 August – 6 September
at normal
75.6°
—
August records over 66 years
96.8°23 August 2023All-time high
49.6°28 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Thiensville (5 mi).
Sun, 0976° / 64°0.98
76 °
River Hills, Sunday, 9 August
Heavy rain. High 76°, low 64°.
Pressure30.00 inHg
Wind8.9 mph W
Humidity93%
Visibility4.3 mi
Dew point68°
Mon, 1085° / 69°0.02
85 °
River Hills, Monday, 10 August
Light rain. High 85°, low 69°.
Pressure29.94 inHg
Wind3.9 mph E
Humidity73%
Visibility6.2 mi
Dew point67°
Tue, 1175° / 67°0.87
75 °
River Hills, Tuesday, 11 August
Heavy rain. High 75°, low 67°.
Pressure29.80 inHg
Wind2.3 mph E
Humidity87%
Visibility6.2 mi
Dew point68°
Wed, 1279° / 65°0
79 °
River Hills, Wednesday, 12 August
Overcast. High 79°, low 65°.
Pressure29.85 inHg
Wind4.4 mph N
Humidity70%
Visibility6.2 mi
Dew point66°
Thu, 1371° / 63°0
71 °
River Hills, Thursday, 13 August
Overcast. High 71°, low 63°.
Pressure30.06 inHg
Wind11.5 mph NE
Humidity55%
Visibility—
Dew point51°
Fri, 1475° / 59°0
75 °
River Hills, Friday, 14 August
Clear. High 75°, low 59°.
Pressure30.12 inHg
Wind7.8 mph SW
Humidity48%
Visibility—
Dew point51°
Sat, 1573° / 63°0
73 °
River Hills, Saturday, 15 August
Overcast. High 73°, low 63°.
Pressure30.30 inHg
Wind8.5 mph SE
Humidity57%
Visibility—
Dew point56°
Sun, 1673° / 60°0
73 °
River Hills, Sunday, 16 August
Overcast. High 73°, low 60°.
Pressure30.15 inHg
Wind7.6 mph SE
Humidity62%
Visibility—
Dew point57°
Mon, 1779° / 64°0
79 °
River Hills, Monday, 17 August
Partly cloudy. High 79°, low 64°.
Pressure30.03 inHg
Wind6.2 mph SW
Humidity59%
Visibility—
Dew point61°
Tue, 1883° / 68°0.03
83 °
River Hills, Tuesday, 18 August
Light rain. High 83°, low 68°.
Pressure29.91 inHg
Wind13.6 mph SW
Humidity61%
Visibility—
Dew point65°
Wed, 1973° / 63°0
73 °
River Hills, Wednesday, 19 August
Overcast. High 73°, low 63°.
Pressure29.88 inHg
Wind18.1 mph NW
Humidity56%
Visibility—
Dew point55°
Thu, 2070° / 57°0
70 °
River Hills, Thursday, 20 August
Overcast. High 70°, low 57°.
Pressure30.06 inHg
Wind12.1 mph N
Humidity47%
Visibility—
Dew point47°
Fri, 2169° / 59°0
69 °
River Hills, Friday, 21 August
Clear. High 69°, low 59°.
Pressure30.09 inHg
Wind8.3 mph E
Humidity55%
Visibility—
Dew point51°
Sat, 2264° / 60°0.42
64 °
River Hills, Saturday, 22 August
Rain. High 64°, low 60°.
Pressure29.91 inHg
Wind12.8 mph SE
Humidity93%
Visibility—
Dew point58°
Sun, 2376° / 63°0.01
76 °
River Hills, Sunday, 23 August
Light rain. High 76°, low 63°.
Pressure29.85 inHg
Wind15.5 mph W
Humidity55%
Visibility—
Dew point56°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2477° / 65°0.13
77 °
River Hills, Monday, 24 August
Climate normal for this date — 60-year average.
Average high77°
Average low65°
Average precipitation0.13 in
Chance of precipitation28%
Record high93° (2020)
Record low56° (1966)
Tue, 2577° / 66°0.09
77 °
River Hills, 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 °
River Hills, 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 °
River Hills, 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 °
River Hills, 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 °
River Hills, 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 °
River Hills, 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 °
River Hills, 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 °
River Hills, 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 °
River Hills, 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 °
River Hills, 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 °
River Hills, 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 °
River Hills, 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 °
River Hills, 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)
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 River Hills, 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 River Hills, 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.