Monthly outlook for Sixmile, IA: average high 78.4°, average low 61.6°. That is 1.1° below the climate normal for August. Precipitation is expected on 4 days (about 0.5 inches), against a normal of 5 days and 1.9 inches. The warmest day looks like 10 August (87.5°), the coolest 21 August (52.4°).
78.4°/61.6°
Average high / low
−1.1°
Below normal
4 / 5
Wet days / normal
0.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
79.7°
80.4°
-0.4°
19 August – 28 August
76.2°
80.4°
-2.4°
29 August – 7 September
at normal
78.6°
—
August records over 66 years
102.2°16 August 1988All-time high
45.1°29 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Goose Lake (6 mi).
Mon, 1087° / 71°0
87 °
Sixmile, Monday, 10 August
Overcast. High 87°, low 71°.
Pressure29.88 inHg
Wind4.1 mph SE
Humidity67%
Visibility6.2 mi
Dew point73°
Tue, 1187° / 72°0
87 °
Sixmile, Tuesday, 11 August
Overcast. High 87°, low 72°.
Pressure29.77 inHg
Wind5.8 mph W
Humidity67%
Visibility6.2 mi
Dew point72°
Wed, 1281° / 68°0
81 °
Sixmile, Wednesday, 12 August
Overcast. High 81°, low 68°.
Pressure29.88 inHg
Wind8 mph N
Humidity76%
Visibility6.2 mi
Dew point70°
Thu, 1373° / 60°0.04
73 °
Sixmile, Thursday, 13 August
Light rain. High 73°, low 60°.
Pressure30.00 inHg
Wind7.3 mph NE
Humidity73%
Visibility—
Dew point62°
Fri, 1477° / 59°0
77 °
Sixmile, Friday, 14 August
Overcast. High 77°, low 59°.
Pressure30.12 inHg
Wind7.1 mph E
Humidity53%
Visibility—
Dew point55°
Sat, 1564° / 59°0.08
64 °
Sixmile, Saturday, 15 August
Light rain. High 64°, low 59°.
Pressure30.30 inHg
Wind7.9 mph E
Humidity93%
Visibility—
Dew point58°
Sun, 1673° / 59°0
73 °
Sixmile, Sunday, 16 August
Overcast. High 73°, low 59°.
Pressure30.15 inHg
Wind6.5 mph SE
Humidity71%
Visibility—
Dew point57°
Mon, 1782° / 64°0
82 °
Sixmile, Monday, 17 August
Overcast. High 82°, low 64°.
Pressure30.06 inHg
Wind7 mph S
Humidity64%
Visibility—
Dew point64°
Tue, 1886° / 65°0
86 °
Sixmile, Tuesday, 18 August
Overcast. High 86°, low 65°.
Pressure29.94 inHg
Wind13.3 mph SW
Humidity58%
Visibility—
Dew point65°
Wed, 1975° / 61°0.22
75 °
Sixmile, Wednesday, 19 August
Rain. High 75°, low 61°.
Pressure30.00 inHg
Wind15 mph N
Humidity89%
Visibility—
Dew point58°
Thu, 2070° / 53°0.08
70 °
Sixmile, Thursday, 20 August
Light rain. High 70°, low 53°.
Pressure30.09 inHg
Wind8.5 mph N
Humidity48%
Visibility—
Dew point47°
Fri, 2174° / 52°0
74 °
Sixmile, Friday, 21 August
Overcast. High 74°, low 52°.
Pressure30.06 inHg
Wind7.2 mph SE
Humidity55%
Visibility—
Dew point53°
Sat, 2276° / 56°0.01
76 °
Sixmile, Saturday, 22 August
Light rain. High 76°, low 56°.
Pressure29.83 inHg
Wind11.7 mph S
Humidity70%
Visibility—
Dew point60°
Sun, 2380° / 64°0
80 °
Sixmile, Sunday, 23 August
Mostly clear. High 80°, low 64°.
Pressure29.94 inHg
Wind15.5 mph SW
Humidity42%
Visibility—
Dew point53°
Mon, 2482° / 60°0.04
82 °
Sixmile, Monday, 24 August
Light rain. High 82°, low 60°.
Pressure29.97 inHg
Wind11.9 mph S
Humidity54%
Visibility—
Dew point61°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2581° / 64°0.13
81 °
Sixmile, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.13 in
Chance of precipitation30%
Record high93° (2003)
Record low52° (2025)
Wed, 2681° / 64°0.17
81 °
Sixmile, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high81°
Average low64°
Average precipitation0.17 in
Chance of precipitation30%
Record high94° (2003)
Record low50° (1964)
Thu, 2780° / 65°0.11
80 °
Sixmile, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high80°
Average low65°
Average precipitation0.11 in
Chance of precipitation27%
Record high95° (2024)
Record low52° (1968)
Fri, 2880° / 64°0.19
80 °
Sixmile, Friday, 28 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.19 in
Chance of precipitation37%
Record high93° (1984)
Record low46° (1986)
Sat, 2980° / 64°0.12
80 °
Sixmile, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.12 in
Chance of precipitation27%
Record high93° (1984)
Record low45° (1986)
Sun, 3079° / 63°0.07
79 °
Sixmile, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.07 in
Chance of precipitation25%
Record high94° (2013)
Record low53° (2009)
Mon, 3179° / 62°0.07
79 °
Sixmile, Monday, 31 August
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.07 in
Chance of precipitation23%
Record high93° (2000)
Record low47° (2009)
Tue, 0179° / 62°0.12
79 °
Sixmile, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.12 in
Chance of precipitation27%
Record high94° (1984)
Record low47° (1967)
Wed, 0279° / 62°0.07
79 °
Sixmile, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.07 in
Chance of precipitation27%
Record high92° (1960)
Record low47° (1967)
Thu, 0378° / 62°0.13
78 °
Sixmile, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.13 in
Chance of precipitation32%
Record high93° (2023)
Record low48° (1974)
Fri, 0478° / 61°0.09
78 °
Sixmile, Friday, 4 September
Climate normal for this date — 60-year average.
Average high78°
Average low61°
Average precipitation0.09 in
Chance of precipitation30%
Record high92° (2023)
Record low46° (2025)
Sat, 0578° / 60°0.09
78 °
Sixmile, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high78°
Average low60°
Average precipitation0.09 in
Chance of precipitation18%
Record high91° (2023)
Record low48° (1974)
Sun, 0678° / 60°0.08
78 °
Sixmile, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high78°
Average low60°
Average precipitation0.08 in
Chance of precipitation30%
Record high92° (1960)
Record low45° (1962)
Mon, 0778° / 60°0.11
78 °
Sixmile, Monday, 7 September
Climate normal for this date — 60-year average.
Average high78°
Average low60°
Average precipitation0.11 in
Chance of precipitation27%
Record high92° (1960)
Record low45° (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 Sixmile, 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 Sixmile, 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.