Monthly outlook for Diamond Grove, WI: average high 76.1°, average low 60.5°. That is 1.3° below the climate normal for August. Precipitation is expected on 4 days (about 1.2 inches), against a normal of 5 days and 2.1 inches. The warmest day looks like 10 August (85.1°), the coolest 20 August (52.2°).
76.1°/60.5°
Average high / low
−1.3°
Below normal
4 / 5
Wet days / normal
1.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
78°
78.5°
-0.2°
19 August – 28 August
73°
78.4°
-3°
29 August – 7 September
at normal
76.5°
—
August records over 66 years
98.6°23 August 2023All-time high
44.1°28 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Bloomington (7 mi).
Mon, 1085° / 69°0.22
85 °
Diamond Grove, Monday, 10 August
Rain. High 85°, low 69°.
Pressure29.88 inHg
Wind11.6 mph SE
Humidity79%
Visibility6.2 mi
Dew point73°
Tue, 1185° / 69°0.15
85 °
Diamond Grove, Tuesday, 11 August
Rain. High 85°, low 69°.
Pressure29.77 inHg
Wind2.3 mph NW
Humidity72%
Visibility6.2 mi
Dew point72°
Wed, 1281° / 67°0
81 °
Diamond Grove, Wednesday, 12 August
Overcast. High 81°, low 67°.
Pressure29.91 inHg
Wind5.6 mph N
Humidity66%
Visibility6.2 mi
Dew point66°
Thu, 1370° / 59°0
70 °
Diamond Grove, Thursday, 13 August
Overcast. High 70°, low 59°.
Pressure30.06 inHg
Wind6.5 mph NE
Humidity76%
Visibility—
Dew point59°
Fri, 1478° / 56°0
78 °
Diamond Grove, Friday, 14 August
Partly cloudy. High 78°, low 56°.
Pressure30.12 inHg
Wind4.4 mph S
Humidity56%
Visibility—
Dew point57°
Sat, 1566° / 60°0
66 °
Diamond Grove, Saturday, 15 August
Overcast. High 66°, low 60°.
Pressure30.27 inHg
Wind8.7 mph SE
Humidity78%
Visibility—
Dew point57°
Sun, 1672° / 57°0
72 °
Diamond Grove, Sunday, 16 August
Overcast. High 72°, low 57°.
Pressure30.15 inHg
Wind5.3 mph SE
Humidity69%
Visibility—
Dew point56°
Mon, 1782° / 61°0.01
82 °
Diamond Grove, Monday, 17 August
Light rain. High 82°, low 61°.
Pressure30.03 inHg
Wind5.1 mph S
Humidity66%
Visibility—
Dew point64°
Tue, 1884° / 66°0.03
84 °
Diamond Grove, Tuesday, 18 August
Light rain. High 84°, low 66°.
Pressure29.94 inHg
Wind14.2 mph SW
Humidity68%
Visibility—
Dew point69°
Wed, 1973° / 60°0.01
73 °
Diamond Grove, Wednesday, 19 August
Light rain. High 73°, low 60°.
Pressure30.00 inHg
Wind14.3 mph NW
Humidity62%
Visibility—
Dew point57°
Thu, 2064° / 52°0
64 °
Diamond Grove, Thursday, 20 August
Light rain. High 64°, low 52°.
Pressure30.12 inHg
Wind7.8 mph W
Humidity72%
Visibility—
Dew point52°
Fri, 2174° / 52°0
74 °
Diamond Grove, Friday, 21 August
Mostly clear. High 74°, low 52°.
Pressure30.06 inHg
Wind6.4 mph SE
Humidity60%
Visibility—
Dew point55°
Sat, 2274° / 55°0.29
74 °
Diamond Grove, Saturday, 22 August
Rain. High 74°, low 55°.
Pressure29.83 inHg
Wind9.9 mph S
Humidity85%
Visibility—
Dew point61°
Sun, 2375° / 61°0
75 °
Diamond Grove, Sunday, 23 August
Clear. High 75°, low 61°.
Pressure29.94 inHg
Wind13.3 mph W
Humidity59%
Visibility—
Dew point57°
Mon, 2478° / 60°0
78 °
Diamond Grove, Monday, 24 August
Overcast. High 78°, low 60°.
Pressure29.97 inHg
Wind8.5 mph SE
Humidity63%
Visibility—
Dew point62°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2579° / 63°0.11
79 °
Diamond Grove, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.11 in
Chance of precipitation33%
Record high90° (2003)
Record low51° (2025)
Wed, 2679° / 64°0.12
79 °
Diamond Grove, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high79°
Average low64°
Average precipitation0.12 in
Chance of precipitation45%
Record high93° (2024)
Record low49° (1964)
Thu, 2778° / 64°0.15
78 °
Diamond Grove, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high78°
Average low64°
Average precipitation0.15 in
Chance of precipitation32%
Record high91° (2024)
Record low51° (1968)
Fri, 2878° / 63°0.19
78 °
Diamond Grove, Friday, 28 August
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.19 in
Chance of precipitation38%
Record high92° (1984)
Record low44° (1986)
Sat, 2978° / 63°0.11
78 °
Diamond Grove, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.11 in
Chance of precipitation32%
Record high92° (1984)
Record low46° (1986)
Sun, 3077° / 62°0.13
77 °
Diamond Grove, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high77°
Average low62°
Average precipitation0.13 in
Chance of precipitation28%
Record high91° (2013)
Record low49° (1974)
Mon, 3177° / 61°0.05
77 °
Diamond Grove, Monday, 31 August
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.05 in
Chance of precipitation20%
Record high91° (2000)
Record low49° (1967)
Tue, 0177° / 61°0.09
77 °
Diamond Grove, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.09 in
Chance of precipitation25%
Record high90° (2011)
Record low49° (1974)
Wed, 0277° / 62°0.08
77 °
Diamond Grove, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high77°
Average low62°
Average precipitation0.08 in
Chance of precipitation28%
Record high89° (1960)
Record low47° (1974)
Thu, 0376° / 62°0.16
76 °
Diamond Grove, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high76°
Average low62°
Average precipitation0.16 in
Chance of precipitation32%
Record high92° (2023)
Record low46° (1974)
Fri, 0476° / 60°0.1
76 °
Diamond Grove, Friday, 4 September
Climate normal for this date — 60-year average.
Average high76°
Average low60°
Average precipitation0.1 in
Chance of precipitation32%
Record high91° (2023)
Record low45° (1974)
Sat, 0576° / 60°0.07
76 °
Diamond Grove, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high76°
Average low60°
Average precipitation0.07 in
Chance of precipitation23%
Record high89° (2023)
Record low46° (1962)
Sun, 0676° / 60°0.07
76 °
Diamond Grove, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high76°
Average low60°
Average precipitation0.07 in
Chance of precipitation30%
Record high90° (1990)
Record low43° (1962)
Mon, 0776° / 60°0.12
76 °
Diamond Grove, Monday, 7 September
Climate normal for this date — 60-year average.
Average high76°
Average low60°
Average precipitation0.12 in
Chance of precipitation28%
Record high89° (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 Diamond 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 Diamond 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.