Monthly outlook for Millnerville, IA: average high 87.3°, average low 66°. That is 2.9° above the climate normal for August. Precipitation is expected on 8 days (about 2.6 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 11 August (101.3°), the coolest 13 August (59.8°).
87.3°/66°
Average high / low
+2.9°
Above normal
8 / 5
Wet days / normal
2.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
85.6°
82.1°
+2°
19 August – 28 August
90.2°
82.3°
+4.4°
29 August – 7 September
at normal
80.8°
—
August records over 66 years
101.8°2 August 2022All-time high
45.1°28 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Jefferson (8 mi).
Mon, 1092° / 67°0.07
92 °
Millnerville, Monday, 10 August
Rain. High 92°, low 67°.
Pressure29.85 inHg
Wind9.2 mph SE
Humidity34%
Visibility6.2 mi
Dew point58°
Tue, 11101° / 66°0.03
101 °
Millnerville, Tuesday, 11 August
Light rain. High 101°, low 66°.
Pressure29.74 inHg
Wind11.1 mph NE
Humidity31%
Visibility6.2 mi
Dew point60°
Wed, 1293° / 67°0.23
93 °
Millnerville, Wednesday, 12 August
Rain. High 93°, low 67°.
Pressure29.85 inHg
Wind12.3 mph E
Humidity39%
Visibility6.2 mi
Dew point60°
Thu, 1374° / 60°1.39
74 °
Millnerville, Thursday, 13 August
Heavy rain. High 74°, low 60°.
Pressure30.03 inHg
Wind15.3 mph E
Humidity65%
Visibility—
Dew point56°
Fri, 1464° / 61°0.44
64 °
Millnerville, Friday, 14 August
Rain. High 64°, low 61°.
Pressure30.12 inHg
Wind11.8 mph E
Humidity93%
Visibility—
Dew point62°
Sat, 1574° / 60°0
74 °
Millnerville, Saturday, 15 August
Overcast. High 74°, low 60°.
Pressure30.15 inHg
Wind8.7 mph SE
Humidity83%
Visibility—
Dew point61°
Sun, 1683° / 64°0
83 °
Millnerville, Sunday, 16 August
Overcast. High 83°, low 64°.
Pressure30.15 inHg
Wind5.6 mph N
Humidity62%
Visibility—
Dew point64°
Mon, 1788° / 65°0
88 °
Millnerville, Monday, 17 August
Mostly clear. High 88°, low 65°.
Pressure30.00 inHg
Wind12.3 mph SE
Humidity51%
Visibility—
Dew point62°
Tue, 1897° / 67°0
97 °
Millnerville, Tuesday, 18 August
Partly cloudy. High 97°, low 67°.
Pressure29.80 inHg
Wind13.8 mph SE
Humidity49%
Visibility—
Dew point65°
Wed, 1993° / 73°0
93 °
Millnerville, Wednesday, 19 August
Overcast. High 93°, low 73°.
Pressure29.77 inHg
Wind10.9 mph SE
Humidity56%
Visibility—
Dew point68°
Thu, 2091° / 66°0.04
91 °
Millnerville, Thursday, 20 August
Light rain. High 91°, low 66°.
Pressure29.85 inHg
Wind16.7 mph N
Humidity42%
Visibility—
Dew point62°
Fri, 2182° / 63°0.13
82 °
Millnerville, Friday, 21 August
Light rain. High 82°, low 63°.
Pressure29.94 inHg
Wind9.3 mph E
Humidity90%
Visibility—
Dew point65°
Sat, 2297° / 69°0
97 °
Millnerville, Saturday, 22 August
Overcast. High 97°, low 69°.
Pressure29.71 inHg
Wind12.2 mph E
Humidity46%
Visibility—
Dew point64°
Sun, 2389° / 71°0.07
89 °
Millnerville, Sunday, 23 August
Light rain. High 89°, low 71°.
Pressure29.83 inHg
Wind12.5 mph E
Humidity79%
Visibility—
Dew point69°
Mon, 2489° / 67°0.23
89 °
Millnerville, Monday, 24 August
Rain. High 89°, low 67°.
Pressure29.94 inHg
Wind21.4 mph N
Humidity60%
Visibility—
Dew point67°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2582° / 65°0.09
82 °
Millnerville, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.09 in
Chance of precipitation20%
Record high97° (1991)
Record low49° (2025)
Wed, 2682° / 65°0.11
82 °
Millnerville, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.11 in
Chance of precipitation35%
Record high96° (1976)
Record low53° (1988)
Thu, 2782° / 65°0.09
82 °
Millnerville, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.09 in
Chance of precipitation28%
Record high97° (1984)
Record low51° (1986)
Fri, 2882° / 64°0.14
82 °
Millnerville, Friday, 28 August
Climate normal for this date — 60-year average.
Average high82°
Average low64°
Average precipitation0.14 in
Chance of precipitation28%
Record high100° (1984)
Record low45° (1986)
Sat, 2983° / 64°0.07
83 °
Millnerville, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high83°
Average low64°
Average precipitation0.07 in
Chance of precipitation18%
Record high99° (2012)
Record low51° (2018)
Sun, 3082° / 64°0.09
82 °
Millnerville, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high82°
Average low64°
Average precipitation0.09 in
Chance of precipitation30%
Record high102° (2012)
Record low50° (2009)
Mon, 3181° / 64°0.1
81 °
Millnerville, Monday, 31 August
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.1 in
Chance of precipitation32%
Record high93° (1990)
Record low48° (1967)
Tue, 0181° / 63°0.06
81 °
Millnerville, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high81°
Average low63°
Average precipitation0.06 in
Chance of precipitation27%
Record high93° (1970)
Record low48° (1974)
Wed, 0281° / 63°0.09
81 °
Millnerville, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high81°
Average low63°
Average precipitation0.09 in
Chance of precipitation30%
Record high98° (2023)
Record low50° (1974)
Thu, 0380° / 63°0.13
80 °
Millnerville, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.13 in
Chance of precipitation27%
Record high96° (2023)
Record low42° (1974)
Fri, 0481° / 62°0.11
81 °
Millnerville, Friday, 4 September
Climate normal for this date — 60-year average.
Average high81°
Average low62°
Average precipitation0.11 in
Chance of precipitation23%
Record high96° (2023)
Record low47° (1974)
Sat, 0580° / 63°0.08
80 °
Millnerville, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.08 in
Chance of precipitation32%
Record high95° (1990)
Record low42° (1962)
Sun, 0681° / 62°0.05
81 °
Millnerville, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high81°
Average low62°
Average precipitation0.05 in
Chance of precipitation17%
Record high100° (1976)
Record low44° (2025)
Mon, 0780° / 61°0.07
80 °
Millnerville, Monday, 7 September
Climate normal for this date — 60-year average.
Average high80°
Average low61°
Average precipitation0.07 in
Chance of precipitation27%
Record high96° (1971)
Record low43° (1986)
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 Millnerville, 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 Millnerville, 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.