Monthly outlook for Dunkerton, IA: average high 79.9°, average low 63.5°. That is 0.2° above the climate normal for August. Precipitation is expected on 4 days (about 0.8 inches), against a normal of 5 days and 2.3 inches. The warmest day looks like 11 August (86.7°), the coolest 14 August (54.9°).
79.9°/63.5°
Average high / low
+0.2°
Above normal
4 / 5
Wet days / normal
0.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
80.3°
79.6°
+0.4°
18 August – 27 August
79.3°
79.6°
-0.2°
28 August – 6 September
at normal
78.3°
—
August records over 66 years
101.3°23 August 2023All-time high
43.5°28 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Waterloo (11 mi).
Sun, 0985° / 65°0.14
85 °
Dunkerton, Sunday, 9 August
Rain. High 85°, low 65°.
Pressure29.83 inHg
Wind10.4 mph SE
Humidity79%
Visibility6.2 mi
Dew point71°
Mon, 1082° / 72°0
82 °
Dunkerton, Monday, 10 August
Overcast. High 82°, low 72°.
Pressure29.85 inHg
Wind3.4 mph S
Humidity79%
Visibility6.2 mi
Dew point73°
Tue, 1187° / 69°0
87 °
Dunkerton, Tuesday, 11 August
Mostly clear. High 87°, low 69°.
Pressure29.77 inHg
Wind4.5 mph SE
Humidity71%
Visibility6.2 mi
Dew point73°
Wed, 1284° / 71°0.01
84 °
Dunkerton, Wednesday, 12 August
Light rain. High 84°, low 71°.
Pressure29.88 inHg
Wind6.6 mph S
Humidity77%
Visibility6.2 mi
Dew point73°
Thu, 1375° / 61°0.2
75 °
Dunkerton, Thursday, 13 August
Rain. High 75°, low 61°.
Pressure29.97 inHg
Wind11.9 mph NE
Humidity68%
Visibility—
Dew point62°
Fri, 1476° / 55°0
76 °
Dunkerton, Friday, 14 August
Clear. High 76°, low 55°.
Pressure30.21 inHg
Wind6.9 mph SE
Humidity56%
Visibility—
Dew point55°
Sat, 1576° / 56°0
76 °
Dunkerton, Saturday, 15 August
Overcast. High 76°, low 56°.
Pressure30.24 inHg
Wind10.3 mph S
Humidity63%
Visibility—
Dew point58°
Sun, 1678° / 60°0.02
78 °
Dunkerton, Sunday, 16 August
Light rain. High 78°, low 60°.
Pressure30.09 inHg
Wind11.5 mph S
Humidity77%
Visibility—
Dew point63°
Mon, 1782° / 68°0.02
82 °
Dunkerton, Monday, 17 August
Light rain. High 82°, low 68°.
Pressure29.97 inHg
Wind7 mph N
Humidity75%
Visibility—
Dew point71°
Tue, 1884° / 68°0
84 °
Dunkerton, Tuesday, 18 August
Overcast. High 84°, low 68°.
Pressure30.03 inHg
Wind10.5 mph SE
Humidity67%
Visibility—
Dew point68°
Wed, 1983° / 67°0.27
83 °
Dunkerton, Wednesday, 19 August
Rain. High 83°, low 67°.
Pressure29.85 inHg
Wind11.6 mph NE
Humidity70%
Visibility—
Dew point71°
Thu, 2079° / 64°0.04
79 °
Dunkerton, Thursday, 20 August
Light rain. High 79°, low 64°.
Pressure29.97 inHg
Wind10.4 mph NE
Humidity67%
Visibility—
Dew point63°
Fri, 2182° / 63°0
82 °
Dunkerton, Friday, 21 August
Clear. High 82°, low 63°.
Pressure29.97 inHg
Wind8.5 mph S
Humidity58%
Visibility—
Dew point62°
Sat, 2268° / 64°0.11
68 °
Dunkerton, Saturday, 22 August
Light rain. High 68°, low 64°.
Pressure30.03 inHg
Wind14.3 mph NE
Humidity81%
Visibility—
Dew point60°
Sun, 2379° / 56°0
79 °
Dunkerton, Sunday, 23 August
Partly cloudy. High 79°, low 56°.
Pressure30.06 inHg
Wind9.6 mph S
Humidity50%
Visibility—
Dew point54°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2480° / 63°0.11
80 °
Dunkerton, Monday, 24 August
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.11 in
Chance of precipitation27%
Record high98° (2023)
Record low50° (1987)
Tue, 2580° / 64°0.14
80 °
Dunkerton, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.14 in
Chance of precipitation32%
Record high94° (2003)
Record low52° (2025)
Wed, 2680° / 64°0.15
80 °
Dunkerton, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.15 in
Chance of precipitation38%
Record high94° (2024)
Record low47° (1964)
Thu, 2780° / 64°0.15
80 °
Dunkerton, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.15 in
Chance of precipitation37%
Record high93° (2013)
Record low52° (1967)
Fri, 2880° / 63°0.21
80 °
Dunkerton, Friday, 28 August
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.21 in
Chance of precipitation37%
Record high92° (1984)
Record low44° (1986)
Sat, 2980° / 63°0.14
80 °
Dunkerton, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.14 in
Chance of precipitation32%
Record high92° (1984)
Record low48° (1986)
Sun, 3079° / 62°0.11
79 °
Dunkerton, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.11 in
Chance of precipitation30%
Record high92° (2013)
Record low49° (1974)
Mon, 3178° / 62°0.06
78 °
Dunkerton, Monday, 31 August
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.06 in
Chance of precipitation23%
Record high92° (2000)
Record low46° (2009)
Tue, 0178° / 61°0.09
78 °
Dunkerton, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high78°
Average low61°
Average precipitation0.09 in
Chance of precipitation27%
Record high91° (2011)
Record low46° (1967)
Wed, 0279° / 62°0.1
79 °
Dunkerton, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.1 in
Chance of precipitation30%
Record high92° (2023)
Record low47° (1968)
Thu, 0377° / 62°0.09
77 °
Dunkerton, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high77°
Average low62°
Average precipitation0.09 in
Chance of precipitation25%
Record high95° (2023)
Record low43° (1974)
Fri, 0478° / 60°0.08
78 °
Dunkerton, Friday, 4 September
Climate normal for this date — 60-year average.
Average high78°
Average low60°
Average precipitation0.08 in
Chance of precipitation23%
Record high95° (2023)
Record low43° (1974)
Sat, 0578° / 60°0.08
78 °
Dunkerton, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high78°
Average low60°
Average precipitation0.08 in
Chance of precipitation23%
Record high92° (2023)
Record low43° (1962)
Sun, 0677° / 60°0.08
77 °
Dunkerton, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high77°
Average low60°
Average precipitation0.08 in
Chance of precipitation25%
Record high92° (1960)
Record low44° (1962)
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 Dunkerton, IA 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 Dunkerton, IA 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.