Monthly outlook for Lake Lorraine, WI: average high 79.8°, average low 63.4°. That is 0.6° above the climate normal for August. Precipitation is expected on 4 days (about 1.4 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 20 August (92.5°), the coolest 15 August (54.2°).
79.8°/63.4°
Average high / low
+0.6°
Above normal
4 / 5
Wet days / normal
1.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
76.9°
78.7°
-1°
19 August – 28 August
84.6°
78.8°
+3.2°
29 August – 7 September
at normal
77°
—
August records over 66 years
98.2°1 August 1988All-time high
45.3°29 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Darien (9 mi).
Mon, 1085° / 69°0.09
85 °
Lake Lorraine, Monday, 10 August
Light rain. High 85°, low 69°.
Pressure29.88 inHg
Wind8.8 mph NE
Humidity80%
Visibility6.2 mi
Dew point71°
Tue, 1182° / 65°0.73
82 °
Lake Lorraine, Tuesday, 11 August
Heavy rain. High 82°, low 65°.
Pressure29.80 inHg
Wind13.9 mph SE
Humidity88%
Visibility6.2 mi
Dew point67°
Wed, 1279° / 66°0
79 °
Lake Lorraine, Wednesday, 12 August
Overcast. High 79°, low 66°.
Pressure29.85 inHg
Wind10.9 mph N
Humidity69%
Visibility6.2 mi
Dew point67°
Thu, 1371° / 59°0
71 °
Lake Lorraine, Thursday, 13 August
Overcast. High 71°, low 59°.
Pressure30.03 inHg
Wind8.1 mph NE
Humidity62%
Visibility—
Dew point56°
Fri, 1472° / 55°0
72 °
Lake Lorraine, Friday, 14 August
Partly cloudy. High 72°, low 55°.
Pressure30.18 inHg
Wind10.9 mph E
Humidity59%
Visibility—
Dew point55°
Sat, 1575° / 54°0
75 °
Lake Lorraine, Saturday, 15 August
Overcast. High 75°, low 54°.
Pressure30.24 inHg
Wind7.9 mph S
Humidity55%
Visibility—
Dew point55°
Sun, 1672° / 62°0.03
72 °
Lake Lorraine, Sunday, 16 August
Light rain. High 72°, low 62°.
Pressure30.12 inHg
Wind6.7 mph SE
Humidity85%
Visibility—
Dew point61°
Mon, 1778° / 62°0.01
78 °
Lake Lorraine, Monday, 17 August
Light rain. High 78°, low 62°.
Pressure30.09 inHg
Wind7.7 mph E
Humidity65%
Visibility—
Dew point63°
Tue, 1877° / 58°0
77 °
Lake Lorraine, Tuesday, 18 August
Overcast. High 77°, low 58°.
Pressure30.03 inHg
Wind7.3 mph S
Humidity71%
Visibility—
Dew point60°
Wed, 1985° / 67°0.17
85 °
Lake Lorraine, Wednesday, 19 August
Light rain. High 85°, low 67°.
Pressure29.88 inHg
Wind16.5 mph S
Humidity68%
Visibility—
Dew point69°
Thu, 2093° / 74°0
93 °
Lake Lorraine, Thursday, 20 August
Overcast. High 93°, low 74°.
Pressure29.77 inHg
Wind8.2 mph NE
Humidity57%
Visibility—
Dew point72°
Fri, 2184° / 67°0
84 °
Lake Lorraine, Friday, 21 August
Partly cloudy. High 84°, low 67°.
Pressure29.94 inHg
Wind10.8 mph NE
Humidity59%
Visibility—
Dew point64°
Sat, 2288° / 64°0.02
88 °
Lake Lorraine, Saturday, 22 August
Light rain. High 88°, low 64°.
Pressure29.85 inHg
Wind12 mph S
Humidity56%
Visibility—
Dew point66°
Sun, 2383° / 66°0
83 °
Lake Lorraine, Sunday, 23 August
Mostly clear. High 83°, low 66°.
Pressure29.83 inHg
Wind13.9 mph NE
Humidity63%
Visibility—
Dew point68°
Mon, 2475° / 64°0.01
75 °
Lake Lorraine, Monday, 24 August
Light rain. High 75°, low 64°.
Pressure30.06 inHg
Wind14.2 mph NE
Humidity75%
Visibility—
Dew point65°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2579° / 64°0.09
79 °
Lake Lorraine, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high79°
Average low64°
Average precipitation0.09 in
Chance of precipitation28%
Record high91° (2003)
Record low51° (1977)
Wed, 2680° / 64°0.15
80 °
Lake Lorraine, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.15 in
Chance of precipitation30%
Record high93° (2003)
Record low49° (2025)
Thu, 2779° / 65°0.1
79 °
Lake Lorraine, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high79°
Average low65°
Average precipitation0.1 in
Chance of precipitation28%
Record high93° (2024)
Record low50° (2025)
Fri, 2879° / 63°0.13
79 °
Lake Lorraine, Friday, 28 August
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.13 in
Chance of precipitation37%
Record high92° (1984)
Record low46° (1986)
Sat, 2979° / 63°0.12
79 °
Lake Lorraine, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.12 in
Chance of precipitation27%
Record high93° (1984)
Record low45° (1986)
Sun, 3078° / 62°0.07
78 °
Lake Lorraine, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.07 in
Chance of precipitation35%
Record high91° (2013)
Record low52° (1988)
Mon, 3178° / 62°0.06
78 °
Lake Lorraine, Monday, 31 August
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.06 in
Chance of precipitation22%
Record high91° (2012)
Record low48° (2009)
Tue, 0177° / 61°0.09
77 °
Lake Lorraine, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.09 in
Chance of precipitation30%
Record high91° (2011)
Record low47° (1967)
Wed, 0278° / 62°0.05
78 °
Lake Lorraine, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.05 in
Chance of precipitation25%
Record high92° (2008)
Record low47° (1965)
Thu, 0377° / 62°0.11
77 °
Lake Lorraine, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high77°
Average low62°
Average precipitation0.11 in
Chance of precipitation33%
Record high92° (2023)
Record low47° (1974)
Fri, 0476° / 60°0.08
76 °
Lake Lorraine, Friday, 4 September
Climate normal for this date — 60-year average.
Average high76°
Average low60°
Average precipitation0.08 in
Chance of precipitation33%
Record high91° (2023)
Record low46° (2025)
Sat, 0576° / 60°0.08
76 °
Lake Lorraine, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high76°
Average low60°
Average precipitation0.08 in
Chance of precipitation22%
Record high88° (2023)
Record low48° (1962)
Sun, 0676° / 60°0.09
76 °
Lake Lorraine, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high76°
Average low60°
Average precipitation0.09 in
Chance of precipitation32%
Record high90° (1990)
Record low45° (1988)
Mon, 0776° / 60°0.1
76 °
Lake Lorraine, Monday, 7 September
Climate normal for this date — 60-year average.
Average high76°
Average low60°
Average precipitation0.1 in
Chance of precipitation28%
Record high90° (1960)
Record low44° (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 Lake Lorraine, 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 Lorraine, 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.