Monthly outlook for Terre du Lac, MO: average high 97.3°, average low 70.3°. That is 6.6° above the climate normal for August. Precipitation is expected on 3 days (about 0.2 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 18 August (105.6°), the coolest 24 August (59°).
97.3°/70.3°
Average high / low
+6.6°
Above normal
3 / 5
Wet days / normal
0.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
99.6°
85.3°
+7.9°
19 August – 28 August
93.3°
85.4°
+4.4°
29 August – 7 September
at normal
82.8°
—
August records over 66 years
103.8°12 August 2007All-time high
50°29 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Potosi (9 mi).
Mon, 1099° / 75°0
99 °
Terre du Lac, Monday, 10 August
Clear. High 99°, low 75°.
Pressure29.97 inHg
Wind10.9 mph SW
Humidity38%
Visibility6.2 mi
Dew point66°
Tue, 11100° / 75°0
100 °
Terre du Lac, Tuesday, 11 August
Clear. High 100°, low 75°.
Pressure29.94 inHg
Wind9.8 mph SW
Humidity35%
Visibility6.2 mi
Dew point64°
Wed, 1297° / 72°0.04
97 °
Terre du Lac, Wednesday, 12 August
Light rain. High 97°, low 72°.
Pressure29.85 inHg
Wind9.8 mph W
Humidity35%
Visibility6.2 mi
Dew point64°
Thu, 1399° / 69°0.07
99 °
Terre du Lac, Thursday, 13 August
Light rain. High 99°, low 69°.
Pressure29.85 inHg
Wind11.6 mph SE
Humidity42%
Visibility—
Dew point64°
Fri, 14104° / 75°0.01
104 °
Terre du Lac, Friday, 14 August
Light rain. High 104°, low 75°.
Pressure29.94 inHg
Wind11.3 mph E
Humidity27%
Visibility—
Dew point57°
Sat, 15104° / 73°0.03
104 °
Terre du Lac, Saturday, 15 August
Light rain. High 104°, low 73°.
Pressure30.03 inHg
Wind8.8 mph S
Humidity23%
Visibility—
Dew point54°
Sun, 16102° / 78°0
102 °
Terre du Lac, Sunday, 16 August
Clear. High 102°, low 78°.
Pressure30.00 inHg
Wind12.3 mph W
Humidity24%
Visibility—
Dew point55°
Mon, 1791° / 67°0
91 °
Terre du Lac, Monday, 17 August
Light rain. High 91°, low 67°.
Pressure30.06 inHg
Wind7.7 mph NE
Humidity37%
Visibility—
Dew point54°
Tue, 18106° / 68°0.06
106 °
Terre du Lac, Tuesday, 18 August
Light rain. High 106°, low 68°.
Pressure29.83 inHg
Wind12.5 mph S
Humidity37%
Visibility—
Dew point61°
Wed, 1998° / 73°0
98 °
Terre du Lac, Wednesday, 19 August
Overcast. High 98°, low 73°.
Pressure29.83 inHg
Wind10 mph NW
Humidity42%
Visibility—
Dew point64°
Thu, 2088° / 64°0
88 °
Terre du Lac, Thursday, 20 August
Partly cloudy. High 88°, low 64°.
Pressure29.94 inHg
Wind7.5 mph N
Humidity38%
Visibility—
Dew point54°
Fri, 2197° / 65°0
97 °
Terre du Lac, Friday, 21 August
Mostly clear. High 97°, low 65°.
Pressure29.83 inHg
Wind9.7 mph S
Humidity39%
Visibility—
Dew point60°
Sat, 22101° / 77°0
101 °
Terre du Lac, Saturday, 22 August
Clear. High 101°, low 77°.
Pressure29.83 inHg
Wind11.3 mph SW
Humidity27%
Visibility—
Dew point56°
Sun, 2388° / 63°0
88 °
Terre du Lac, Sunday, 23 August
Clear. High 88°, low 63°.
Pressure30.12 inHg
Wind9.3 mph NE
Humidity31%
Visibility—
Dew point49°
Mon, 2487° / 59°0
87 °
Terre du Lac, Monday, 24 August
Partly cloudy. High 87°, low 59°.
Pressure30.18 inHg
Wind6.8 mph E
Humidity33%
Visibility—
Dew point49°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2586° / 68°0.06
86 °
Terre du Lac, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high86°
Average low68°
Average precipitation0.06 in
Chance of precipitation22%
Record high100° (2023)
Record low56° (1966)
Wed, 2686° / 68°0.09
86 °
Terre du Lac, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high86°
Average low68°
Average precipitation0.09 in
Chance of precipitation35%
Record high99° (1983)
Record low53° (2025)
Thu, 2785° / 68°0.11
85 °
Terre du Lac, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high85°
Average low68°
Average precipitation0.11 in
Chance of precipitation25%
Record high97° (1983)
Record low54° (2025)
Fri, 2885° / 67°0.09
85 °
Terre du Lac, Friday, 28 August
Climate normal for this date — 60-year average.
Average high85°
Average low67°
Average precipitation0.09 in
Chance of precipitation28%
Record high98° (2000)
Record low55° (1967)
Sat, 2984° / 67°0.09
84 °
Terre du Lac, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high84°
Average low67°
Average precipitation0.09 in
Chance of precipitation32%
Record high97° (1984)
Record low50° (1986)
Sun, 3084° / 67°0.13
84 °
Terre du Lac, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high84°
Average low67°
Average precipitation0.13 in
Chance of precipitation28%
Record high97° (1995)
Record low53° (1986)
Mon, 3183° / 67°0.12
83 °
Terre du Lac, Monday, 31 August
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.12 in
Chance of precipitation35%
Record high98° (2013)
Record low54° (2009)
Tue, 0183° / 67°0.1
83 °
Terre du Lac, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.1 in
Chance of precipitation33%
Record high97° (2013)
Record low51° (1967)
Wed, 0282° / 66°0.1
82 °
Terre du Lac, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high82°
Average low66°
Average precipitation0.1 in
Chance of precipitation35%
Record high95° (2011)
Record low51° (1974)
Thu, 0382° / 65°0.09
82 °
Terre du Lac, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.09 in
Chance of precipitation32%
Record high94° (2011)
Record low49° (1974)
Fri, 0482° / 65°0.11
82 °
Terre du Lac, Friday, 4 September
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.11 in
Chance of precipitation28%
Record high96° (1999)
Record low48° (1974)
Sat, 0582° / 65°0.05
82 °
Terre du Lac, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.05 in
Chance of precipitation25%
Record high96° (1990)
Record low50° (1974)
Sun, 0682° / 64°0.04
82 °
Terre du Lac, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high82°
Average low64°
Average precipitation0.04 in
Chance of precipitation23%
Record high98° (1990)
Record low51° (1988)
Mon, 0782° / 64°0.07
82 °
Terre du Lac, Monday, 7 September
Climate normal for this date — 60-year average.
Average high82°
Average low64°
Average precipitation0.07 in
Chance of precipitation27%
Record high97° (1990)
Record low50° (2017)
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 Terre du Lac, MO 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 Terre du Lac, MO 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.