Monthly outlook for Twin Grove, WI: average high 81°, average low 64.5°. That is 1.2° above the climate normal for August. Precipitation is expected on 4 days (about 1.4 inches), against a normal of 5 days and 1.9 inches. The warmest day looks like 20 August (93.5°), the coolest 15 August (56.5°).
81°/64.5°
Average high / low
+1.2°
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
78.1°
78.8°
-0.4°
19 August – 28 August
85.9°
78.8°
+3.9°
29 August – 7 September
at normal
76.8°
—
August records over 66 years
99°23 August 2023All-time high
45.7°28 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Monroe (7 mi).
Mon, 1086° / 70°0.13
86 °
Twin Grove, Monday, 10 August
Rain. High 86°, low 70°.
Pressure29.88 inHg
Wind6.8 mph E
Humidity84%
Visibility6.2 mi
Dew point71°
Tue, 1183° / 68°0.17
83 °
Twin Grove, Tuesday, 11 August
Rain. High 83°, low 68°.
Pressure29.80 inHg
Wind7.7 mph S
Humidity84%
Visibility6.2 mi
Dew point72°
Wed, 1281° / 67°0
81 °
Twin Grove, Wednesday, 12 August
Overcast. High 81°, low 67°.
Pressure29.85 inHg
Wind6.5 mph N
Humidity68%
Visibility6.2 mi
Dew point68°
Thu, 1373° / 60°0
73 °
Twin Grove, Thursday, 13 August
Overcast. High 73°, low 60°.
Pressure30.03 inHg
Wind7.7 mph N
Humidity66%
Visibility—
Dew point59°
Fri, 1474° / 57°0
74 °
Twin Grove, Friday, 14 August
Partly cloudy. High 74°, low 57°.
Pressure30.18 inHg
Wind8.5 mph E
Humidity59%
Visibility—
Dew point55°
Sat, 1574° / 57°0.02
74 °
Twin Grove, Saturday, 15 August
Light rain. High 74°, low 57°.
Pressure30.24 inHg
Wind9 mph SE
Humidity67%
Visibility—
Dew point56°
Sun, 1674° / 62°0.03
74 °
Twin Grove, Sunday, 16 August
Light rain. High 74°, low 62°.
Pressure30.09 inHg
Wind5.5 mph SE
Humidity91%
Visibility—
Dew point64°
Mon, 1779° / 63°0
79 °
Twin Grove, Monday, 17 August
Overcast. High 79°, low 63°.
Pressure30.09 inHg
Wind6.9 mph E
Humidity63%
Visibility—
Dew point62°
Tue, 1877° / 60°0.03
77 °
Twin Grove, Tuesday, 18 August
Light rain. High 77°, low 60°.
Pressure30.00 inHg
Wind7.9 mph S
Humidity84%
Visibility—
Dew point65°
Wed, 1985° / 67°0
85 °
Twin Grove, Wednesday, 19 August
Overcast. High 85°, low 67°.
Pressure29.85 inHg
Wind14.8 mph SE
Humidity72%
Visibility—
Dew point70°
Thu, 2094° / 76°0
94 °
Twin Grove, Thursday, 20 August
Overcast. High 94°, low 76°.
Pressure29.77 inHg
Wind9.7 mph S
Humidity62%
Visibility—
Dew point74°
Fri, 2185° / 68°0
85 °
Twin Grove, Friday, 21 August
Mostly clear. High 85°, low 68°.
Pressure29.94 inHg
Wind12.1 mph NE
Humidity57%
Visibility—
Dew point64°
Sat, 2289° / 64°0.01
89 °
Twin Grove, Saturday, 22 August
Light rain. High 89°, low 64°.
Pressure29.85 inHg
Wind13.2 mph SE
Humidity62%
Visibility—
Dew point68°
Sun, 2385° / 69°0.01
85 °
Twin Grove, Sunday, 23 August
Light rain. High 85°, low 69°.
Pressure29.83 inHg
Wind14.6 mph NE
Humidity58%
Visibility—
Dew point67°
Mon, 2478° / 63°0.08
78 °
Twin Grove, Monday, 24 August
Light rain. High 78°, low 63°.
Pressure30.06 inHg
Wind12.4 mph E
Humidity77%
Visibility—
Dew point67°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2579° / 63°0.1
79 °
Twin Grove, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.1 in
Chance of precipitation25%
Record high91° (2020)
Record low51° (2017)
Wed, 2679° / 64°0.17
79 °
Twin Grove, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high79°
Average low64°
Average precipitation0.17 in
Chance of precipitation35%
Record high93° (2003)
Record low49° (1964)
Thu, 2779° / 64°0.12
79 °
Twin Grove, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high79°
Average low64°
Average precipitation0.12 in
Chance of precipitation30%
Record high94° (2024)
Record low50° (1968)
Fri, 2879° / 63°0.15
79 °
Twin Grove, Friday, 28 August
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.15 in
Chance of precipitation35%
Record high94° (1984)
Record low46° (1986)
Sat, 2978° / 62°0.15
78 °
Twin Grove, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.15 in
Chance of precipitation30%
Record high93° (1984)
Record low46° (1965)
Sun, 3078° / 62°0.06
78 °
Twin Grove, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.06 in
Chance of precipitation28%
Record high93° (2013)
Record low51° (2009)
Mon, 3177° / 61°0.06
77 °
Twin Grove, Monday, 31 August
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.06 in
Chance of precipitation18%
Record high90° (2000)
Record low47° (2009)
Tue, 0177° / 61°0.1
77 °
Twin Grove, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.1 in
Chance of precipitation27%
Record high91° (2011)
Record low46° (1967)
Wed, 0277° / 61°0.06
77 °
Twin Grove, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.06 in
Chance of precipitation27%
Record high90° (2008)
Record low49° (1974)
Thu, 0377° / 62°0.12
77 °
Twin Grove, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high77°
Average low62°
Average precipitation0.12 in
Chance of precipitation37%
Record high93° (2023)
Record low46° (1974)
Fri, 0476° / 60°0.1
76 °
Twin Grove, Friday, 4 September
Climate normal for this date — 60-year average.
Average high76°
Average low60°
Average precipitation0.1 in
Chance of precipitation33%
Record high92° (2023)
Record low44° (1974)
Sat, 0576° / 60°0.07
76 °
Twin Grove, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high76°
Average low60°
Average precipitation0.07 in
Chance of precipitation23%
Record high88° (2023)
Record low48° (1962)
Sun, 0676° / 60°0.09
76 °
Twin Grove, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high76°
Average low60°
Average precipitation0.09 in
Chance of precipitation32%
Record high91° (1990)
Record low44° (1962)
Mon, 0776° / 60°0.14
76 °
Twin Grove, Monday, 7 September
Climate normal for this date — 60-year average.
Average high76°
Average low60°
Average precipitation0.14 in
Chance of precipitation27%
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 Twin Grove, 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 Twin Grove, 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.