Monthly outlook for Union Mills, IA: average high 82.4°, average low 63.6°. That is 0.3° above the climate normal for August. Precipitation is expected on 2 days (about 0.5 inches), against a normal of 5 days and 1.9 inches. The warmest day looks like 9 August (93.5°), the coolest 21 August (50.9°).
82.4°/63.6°
Average high / low
+0.3°
Above normal
2 / 5
Wet days / normal
0.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
82.9°
81.9°
+0.6°
18 August – 27 August
81.4°
82°
-0.3°
28 August – 6 September
at normal
80.3°
—
August records over 66 years
101.8°16 August 1988All-time high
45°28 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Rose Hill (11 mi).
Sun, 0993° / 70°0
93 °
Union Mills, Sunday, 9 August
Partly cloudy. High 93°, low 70°.
Pressure29.80 inHg
Wind12 mph SW
Humidity53%
Visibility6.2 mi
Dew point69°
Mon, 1091° / 73°0
91 °
Union Mills, Monday, 10 August
Light rain. High 91°, low 73°.
Pressure29.83 inHg
Wind6.3 mph SW
Humidity51%
Visibility6.2 mi
Dew point68°
Tue, 1193° / 74°0
93 °
Union Mills, Tuesday, 11 August
Partly cloudy. High 93°, low 74°.
Pressure29.74 inHg
Wind10.4 mph SW
Humidity48%
Visibility6.2 mi
Dew point67°
Wed, 1286° / 70°0.02
86 °
Union Mills, Wednesday, 12 August
Light rain. High 86°, low 70°.
Pressure29.85 inHg
Wind10.3 mph NE
Humidity82%
Visibility6.2 mi
Dew point69°
Thu, 1373° / 61°0.1
73 °
Union Mills, Thursday, 13 August
Light rain. High 73°, low 61°.
Pressure29.94 inHg
Wind13.7 mph NE
Humidity71%
Visibility—
Dew point62°
Fri, 1479° / 59°0
79 °
Union Mills, Friday, 14 August
Overcast. High 79°, low 59°.
Pressure30.09 inHg
Wind10.2 mph E
Humidity50%
Visibility—
Dew point56°
Sat, 1567° / 60°0.27
67 °
Union Mills, Saturday, 15 August
Rain. High 67°, low 60°.
Pressure30.21 inHg
Wind15.7 mph E
Humidity89%
Visibility—
Dew point57°
Sun, 1678° / 62°0
78 °
Union Mills, Sunday, 16 August
Overcast. High 78°, low 62°.
Pressure30.12 inHg
Wind6.7 mph E
Humidity75%
Visibility—
Dew point63°
Mon, 1786° / 67°0.03
86 °
Union Mills, Monday, 17 August
Light rain. High 86°, low 67°.
Pressure30.03 inHg
Wind7.4 mph SE
Humidity59%
Visibility—
Dew point65°
Tue, 1890° / 67°0
90 °
Union Mills, Tuesday, 18 August
Overcast. High 90°, low 67°.
Pressure29.94 inHg
Wind10.6 mph S
Humidity56%
Visibility—
Dew point66°
Wed, 1977° / 61°0.01
77 °
Union Mills, Wednesday, 19 August
Light rain. High 77°, low 61°.
Pressure30.03 inHg
Wind15.3 mph N
Humidity73%
Visibility—
Dew point61°
Thu, 2069° / 56°0.01
69 °
Union Mills, Thursday, 20 August
Light rain. High 69°, low 56°.
Pressure30.09 inHg
Wind16.2 mph NE
Humidity51%
Visibility—
Dew point49°
Fri, 2173° / 51°0
73 °
Union Mills, Friday, 21 August
Overcast. High 73°, low 51°.
Pressure30.03 inHg
Wind11 mph SE
Humidity47%
Visibility—
Dew point47°
Sat, 2290° / 60°0
90 °
Union Mills, Saturday, 22 August
Overcast. High 90°, low 60°.
Pressure29.83 inHg
Wind13.1 mph SW
Humidity56%
Visibility—
Dew point61°
Sun, 2390° / 65°0
90 °
Union Mills, Sunday, 23 August
Clear. High 90°, low 65°.
Pressure29.94 inHg
Wind8.3 mph W
Humidity29%
Visibility—
Dew point48°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2482° / 65°0.11
82 °
Union Mills, Monday, 24 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.11 in
Chance of precipitation20%
Record high97° (2023)
Record low51° (1966)
Tue, 2582° / 65°0.17
82 °
Union Mills, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.17 in
Chance of precipitation35%
Record high98° (2003)
Record low52° (1966)
Wed, 2682° / 65°0.22
82 °
Union Mills, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.22 in
Chance of precipitation35%
Record high96° (1983)
Record low50° (2025)
Thu, 2782° / 66°0.12
82 °
Union Mills, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.12 in
Chance of precipitation30%
Record high96° (2013)
Record low54° (1967)
Fri, 2882° / 65°0.13
82 °
Union Mills, Friday, 28 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.13 in
Chance of precipitation33%
Record high98° (1984)
Record low45° (1986)
Sat, 2982° / 65°0.07
82 °
Union Mills, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.07 in
Chance of precipitation28%
Record high96° (1984)
Record low49° (1986)
Sun, 3081° / 64°0.11
81 °
Union Mills, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.11 in
Chance of precipitation28%
Record high99° (2013)
Record low50° (2009)
Mon, 3180° / 63°0.12
80 °
Union Mills, Monday, 31 August
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.12 in
Chance of precipitation25%
Record high96° (2000)
Record low46° (2009)
Tue, 0180° / 64°0.11
80 °
Union Mills, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.11 in
Chance of precipitation30%
Record high96° (1984)
Record low46° (1967)
Wed, 0281° / 64°0.09
81 °
Union Mills, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.09 in
Chance of precipitation28%
Record high95° (2000)
Record low51° (1967)
Thu, 0380° / 63°0.07
80 °
Union Mills, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high80°
Average low63°
Average precipitation0.07 in
Chance of precipitation25%
Record high94° (1960)
Record low44° (1974)
Fri, 0479° / 62°0.07
79 °
Union Mills, Friday, 4 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.07 in
Chance of precipitation20%
Record high95° (1960)
Record low42° (1974)
Sat, 0580° / 62°0.07
80 °
Union Mills, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high80°
Average low62°
Average precipitation0.07 in
Chance of precipitation18%
Record high95° (1960)
Record low45° (1962)
Sun, 0679° / 62°0.11
79 °
Union Mills, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.11 in
Chance of precipitation30%
Record high95° (1960)
Record low46° (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 Union Mills, 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 Union Mills, 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.