Monthly outlook for Lake Hallie, WI: average high 86°, average low 61.1°. That is 5° above the climate normal for August. Precipitation is expected on 6 days (about 0.9 inches), against a normal of 5 days and 2.2 inches. The warmest day looks like 19 August (97.2°), the coolest 14 August (51.1°).
86°/61.1°
Average high / low
+5°
Above normal
6 / 5
Wet days / normal
0.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
85°
77.3°
+4.2°
19 August – 28 August
87.8°
76.7°
+6.2°
29 August – 7 September
at normal
74.9°
—
August records over 66 years
98.4°16 August 1988All-time high
41°28 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Elk Mound (13 mi).
Mon, 1089° / 60°0
89 °
Lake Hallie, Monday, 10 August
Overcast. High 89°, low 60°.
Pressure29.91 inHg
Wind3.2 mph S
Humidity34%
Visibility6.2 mi
Dew point54°
Tue, 1192° / 66°0.15
92 °
Lake Hallie, Tuesday, 11 August
Rain. High 92°, low 66°.
Pressure29.80 inHg
Wind2.1 mph N
Humidity49%
Visibility6.2 mi
Dew point63°
Wed, 1287° / 58°0
87 °
Lake Hallie, Wednesday, 12 August
Mostly clear. High 87°, low 58°.
Pressure29.88 inHg
Wind12.9 mph NW
Humidity25%
Visibility6.2 mi
Dew point45°
Thu, 1379° / 54°0
79 °
Lake Hallie, Thursday, 13 August
Overcast. High 79°, low 54°.
Pressure30.03 inHg
Wind6.9 mph N
Humidity29%
Visibility—
Dew point38°
Fri, 1483° / 51°0
83 °
Lake Hallie, Friday, 14 August
Mostly clear. High 83°, low 51°.
Pressure30.18 inHg
Wind8.9 mph SE
Humidity26%
Visibility—
Dew point39°
Sat, 1573° / 56°0
73 °
Lake Hallie, Saturday, 15 August
Overcast. High 73°, low 56°.
Pressure30.21 inHg
Wind11 mph SE
Humidity32%
Visibility—
Dew point40°
Sun, 1689° / 63°0
89 °
Lake Hallie, Sunday, 16 August
Overcast. High 89°, low 63°.
Pressure30.06 inHg
Wind12.8 mph NW
Humidity46%
Visibility—
Dew point57°
Mon, 1785° / 55°0
85 °
Lake Hallie, Monday, 17 August
Overcast. High 85°, low 55°.
Pressure30.09 inHg
Wind6.3 mph NE
Humidity24%
Visibility—
Dew point40°
Tue, 1886° / 64°0.02
86 °
Lake Hallie, Tuesday, 18 August
Light rain. High 86°, low 64°.
Pressure29.91 inHg
Wind14 mph S
Humidity48%
Visibility—
Dew point59°
Wed, 1997° / 69°0.31
97 °
Lake Hallie, Wednesday, 19 August
Rain. High 97°, low 69°.
Pressure29.80 inHg
Wind11 mph SW
Humidity45%
Visibility—
Dew point65°
Thu, 2095° / 72°0.15
95 °
Lake Hallie, Thursday, 20 August
Rain. High 95°, low 72°.
Pressure29.80 inHg
Wind15.9 mph NW
Humidity28%
Visibility—
Dew point54°
Fri, 2188° / 60°0
88 °
Lake Hallie, Friday, 21 August
Overcast. High 88°, low 60°.
Pressure29.97 inHg
Wind12.7 mph NE
Humidity31%
Visibility—
Dew point49°
Sat, 2288° / 64°0.09
88 °
Lake Hallie, Saturday, 22 August
Light rain. High 88°, low 64°.
Pressure29.83 inHg
Wind11.4 mph NE
Humidity46%
Visibility—
Dew point59°
Sun, 2377° / 64°0.08
77 °
Lake Hallie, Sunday, 23 August
Light rain. High 77°, low 64°.
Pressure29.97 inHg
Wind12.9 mph E
Humidity78%
Visibility—
Dew point60°
Mon, 2482° / 58°0.02
82 °
Lake Hallie, Monday, 24 August
Light rain. High 82°, low 58°.
Pressure30.06 inHg
Wind9.5 mph SE
Humidity57%
Visibility—
Dew point59°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2578° / 61°0.13
78 °
Lake Hallie, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high78°
Average low61°
Average precipitation0.13 in
Chance of precipitation33%
Record high91° (2013)
Record low50° (1979)
Wed, 2677° / 62°0.17
77 °
Lake Hallie, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high77°
Average low62°
Average precipitation0.17 in
Chance of precipitation40%
Record high91° (2013)
Record low44° (1964)
Thu, 2777° / 61°0.19
77 °
Lake Hallie, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.19 in
Chance of precipitation35%
Record high91° (2013)
Record low46° (1968)
Fri, 2876° / 60°0.12
76 °
Lake Hallie, Friday, 28 August
Climate normal for this date — 60-year average.
Average high76°
Average low60°
Average precipitation0.12 in
Chance of precipitation40%
Record high92° (1984)
Record low41° (1986)
Sat, 2976° / 60°0.13
76 °
Lake Hallie, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high76°
Average low60°
Average precipitation0.13 in
Chance of precipitation30%
Record high91° (2012)
Record low43° (1965)
Sun, 3075° / 60°0.12
75 °
Lake Hallie, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high75°
Average low60°
Average precipitation0.12 in
Chance of precipitation32%
Record high95° (2012)
Record low48° (2009)
Mon, 3175° / 58°0.13
75 °
Lake Hallie, Monday, 31 August
Climate normal for this date — 60-year average.
Average high75°
Average low58°
Average precipitation0.13 in
Chance of precipitation25%
Record high88° (1960)
Record low43° (1967)
Tue, 0175° / 58°0.09
75 °
Lake Hallie, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high75°
Average low58°
Average precipitation0.09 in
Chance of precipitation27%
Record high92° (2011)
Record low44° (1974)
Wed, 0275° / 59°0.11
75 °
Lake Hallie, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high75°
Average low59°
Average precipitation0.11 in
Chance of precipitation37%
Record high89° (2023)
Record low42° (1974)
Thu, 0374° / 59°0.11
74 °
Lake Hallie, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high74°
Average low59°
Average precipitation0.11 in
Chance of precipitation33%
Record high93° (2023)
Record low38° (1974)
Fri, 0475° / 58°0.14
75 °
Lake Hallie, Friday, 4 September
Climate normal for this date — 60-year average.
Average high75°
Average low58°
Average precipitation0.14 in
Chance of precipitation33%
Record high92° (2023)
Record low40° (1974)
Sat, 0574° / 57°0.15
74 °
Lake Hallie, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high74°
Average low57°
Average precipitation0.15 in
Chance of precipitation32%
Record high89° (2023)
Record low40° (1962)
Sun, 0674° / 58°0.11
74 °
Lake Hallie, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high74°
Average low58°
Average precipitation0.11 in
Chance of precipitation32%
Record high89° (1960)
Record low44° (1962)
Mon, 0773° / 57°0.1
73 °
Lake Hallie, Monday, 7 September
Climate normal for this date — 60-year average.
Average high73°
Average low57°
Average precipitation0.1 in
Chance of precipitation40%
Record high91° (1976)
Record low42° (2024)
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 Lake Hallie, 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 Lake Hallie, 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.