Monthly outlook for Lone Tree, IA: average high 81.3°, average low 63.3°. That is 0.2° below the climate normal for August. Precipitation is expected on 2 days (about 0.3 inches), against a normal of 5 days and 1.9 inches. The warmest day looks like 9 August (92.9°), the coolest 21 August (51.3°).
81.3°/63.3°
Average high / low
−0.2°
Below normal
2 / 5
Wet days / normal
0.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
82.2°
81.7°
+0.3°
18 August – 27 August
79.8°
81.6°
-1°
28 August – 6 September
at normal
79.9°
—
August records over 66 years
102.6°16 August 1988All-time high
46.6°28 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Letts (15 mi).
Sun, 0993° / 67°0
93 °
Lone Tree, Sunday, 9 August
Partly cloudy. High 93°, low 67°.
Pressure29.83 inHg
Wind12.1 mph S
Humidity65%
Visibility6.2 mi
Dew point72°
Mon, 1090° / 73°0
90 °
Lone Tree, Monday, 10 August
Overcast. High 90°, low 73°.
Pressure29.85 inHg
Wind4 mph S
Humidity60%
Visibility6.2 mi
Dew point71°
Tue, 1193° / 73°0
93 °
Lone Tree, Tuesday, 11 August
Overcast. High 93°, low 73°.
Pressure29.74 inHg
Wind11.9 mph SW
Humidity52%
Visibility6.2 mi
Dew point69°
Wed, 1283° / 69°0
83 °
Lone Tree, Wednesday, 12 August
Overcast. High 83°, low 69°.
Pressure29.88 inHg
Wind8.3 mph N
Humidity74%
Visibility6.2 mi
Dew point70°
Thu, 1373° / 63°0.03
73 °
Lone Tree, Thursday, 13 August
Light rain. High 73°, low 63°.
Pressure29.97 inHg
Wind11.2 mph NE
Humidity74%
Visibility—
Dew point63°
Fri, 1478° / 59°0
78 °
Lone Tree, Friday, 14 August
Overcast. High 78°, low 59°.
Pressure30.09 inHg
Wind9.3 mph E
Humidity53%
Visibility—
Dew point57°
Sat, 1567° / 59°0.16
67 °
Lone Tree, Saturday, 15 August
Rain. High 67°, low 59°.
Pressure30.24 inHg
Wind14.1 mph SE
Humidity91%
Visibility—
Dew point57°
Sun, 1677° / 62°0
77 °
Lone Tree, Sunday, 16 August
Overcast. High 77°, low 62°.
Pressure30.12 inHg
Wind7.1 mph E
Humidity69%
Visibility—
Dew point61°
Mon, 1784° / 66°0.07
84 °
Lone Tree, Monday, 17 August
Light rain. High 84°, low 66°.
Pressure30.06 inHg
Wind6.8 mph SE
Humidity62%
Visibility—
Dew point65°
Tue, 1888° / 66°0
88 °
Lone Tree, Tuesday, 18 August
Overcast. High 88°, low 66°.
Pressure29.97 inHg
Wind10.6 mph SW
Humidity57%
Visibility—
Dew point65°
Wed, 1976° / 61°0.01
76 °
Lone Tree, Wednesday, 19 August
Light rain. High 76°, low 61°.
Pressure30.00 inHg
Wind12 mph N
Humidity84%
Visibility—
Dew point60°
Thu, 2069° / 55°0.04
69 °
Lone Tree, Thursday, 20 August
Light rain. High 69°, low 55°.
Pressure30.09 inHg
Wind15 mph N
Humidity56%
Visibility—
Dew point50°
Fri, 2173° / 51°0
73 °
Lone Tree, Friday, 21 August
Overcast. High 73°, low 51°.
Pressure30.06 inHg
Wind9.7 mph SE
Humidity47%
Visibility—
Dew point49°
Sat, 2285° / 58°0
85 °
Lone Tree, Saturday, 22 August
Overcast. High 85°, low 58°.
Pressure29.83 inHg
Wind11.5 mph W
Humidity62%
Visibility—
Dew point62°
Sun, 2388° / 65°0
88 °
Lone Tree, Sunday, 23 August
Clear. High 88°, low 65°.
Pressure29.94 inHg
Wind11.9 mph SW
Humidity34%
Visibility—
Dew point50°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2482° / 65°0.1
82 °
Lone Tree, Monday, 24 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.1 in
Chance of precipitation20%
Record high97° (2023)
Record low53° (1966)
Tue, 2582° / 65°0.13
82 °
Lone Tree, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.13 in
Chance of precipitation38%
Record high95° (2003)
Record low53° (1966)
Wed, 2682° / 66°0.2
82 °
Lone Tree, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.2 in
Chance of precipitation32%
Record high95° (2003)
Record low50° (2025)
Thu, 2782° / 67°0.09
82 °
Lone Tree, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high82°
Average low67°
Average precipitation0.09 in
Chance of precipitation23%
Record high97° (2024)
Record low53° (2025)
Fri, 2882° / 65°0.14
82 °
Lone Tree, Friday, 28 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.14 in
Chance of precipitation32%
Record high97° (1984)
Record low47° (1986)
Sat, 2982° / 65°0.1
82 °
Lone Tree, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.1 in
Chance of precipitation28%
Record high96° (1984)
Record low47° (1986)
Sun, 3080° / 64°0.09
80 °
Lone Tree, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.09 in
Chance of precipitation23%
Record high98° (2013)
Record low53° (2009)
Mon, 3180° / 64°0.13
80 °
Lone Tree, Monday, 31 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.13 in
Chance of precipitation22%
Record high94° (2000)
Record low48° (2009)
Tue, 0180° / 64°0.12
80 °
Lone Tree, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.12 in
Chance of precipitation30%
Record high96° (1984)
Record low49° (1967)
Wed, 0280° / 64°0.1
80 °
Lone Tree, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.1 in
Chance of precipitation30%
Record high93° (2000)
Record low50° (1967)
Thu, 0379° / 64°0.1
79 °
Lone Tree, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high79°
Average low64°
Average precipitation0.1 in
Chance of precipitation28%
Record high92° (2023)
Record low48° (1974)
Fri, 0479° / 62°0.09
79 °
Lone Tree, Friday, 4 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.09 in
Chance of precipitation25%
Record high92° (1983)
Record low46° (1974)
Sat, 0579° / 62°0.06
79 °
Lone Tree, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.06 in
Chance of precipitation20%
Record high92° (1990)
Record low48° (1974)
Sun, 0678° / 62°0.14
78 °
Lone Tree, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.14 in
Chance of precipitation30%
Record high93° (1990)
Record low47° (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 Lone Tree, 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 Lone Tree, 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.