Monthly outlook for Rock Port, MO: average high 97.2°, average low 70.5°. That is 6.9° above the climate normal for August. Precipitation is expected on 7 days (about 0.8 inches), against a normal of 4 days and 1.7 inches. The warmest day looks like 19 August (116.4°), the coolest 14 August (63.4°).
97.2°/70.5°
Average high / low
+6.9°
Above normal
7 / 4
Wet days / normal
0.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
90.3°
84.7°
+3.1°
19 August – 28 August
108.7°
85°
+13.2°
29 August – 7 September
at normal
83°
—
August records over 66 years
103.5°2 August 1964All-time high
50°31 August 2009All-time low
Climate normals and records are computed from the nearest reference point — Brownville (7 mi).
Mon, 1094° / 73°0.02
94 °
Rock Port, Monday, 10 August
Light rain. High 94°, low 73°.
Pressure29.85 inHg
Wind5.9 mph SW
Humidity50%
Visibility6.2 mi
Dew point63°
Tue, 11110° / 69°0.04
110 °
Rock Port, Tuesday, 11 August
Light rain. High 110°, low 69°.
Pressure29.71 inHg
Wind14.3 mph SW
Humidity28%
Visibility6.2 mi
Dew point60°
Wed, 1295° / 67°0.04
95 °
Rock Port, Wednesday, 12 August
Light rain. High 95°, low 67°.
Pressure29.80 inHg
Wind8.9 mph NE
Humidity59%
Visibility6.2 mi
Dew point66°
Thu, 1381° / 68°0.08
81 °
Rock Port, Thursday, 13 August
Light rain. High 81°, low 68°.
Pressure29.88 inHg
Wind22.5 mph E
Humidity71%
Visibility—
Dew point69°
Fri, 1471° / 63°0.12
71 °
Rock Port, Friday, 14 August
Light rain. High 71°, low 63°.
Pressure30.03 inHg
Wind21.3 mph E
Humidity89%
Visibility—
Dew point65°
Sat, 1575° / 64°0.14
75 °
Rock Port, Saturday, 15 August
Light rain. High 75°, low 64°.
Pressure30.12 inHg
Wind9.5 mph E
Humidity93%
Visibility—
Dew point66°
Sun, 1687° / 65°0.08
87 °
Rock Port, Sunday, 16 August
Light rain. High 87°, low 65°.
Pressure30.12 inHg
Wind9.2 mph NE
Humidity54%
Visibility—
Dew point64°
Mon, 1787° / 68°0.06
87 °
Rock Port, Monday, 17 August
Light rain. High 87°, low 68°.
Pressure30.06 inHg
Wind10.9 mph E
Humidity68%
Visibility—
Dew point65°
Tue, 18107° / 69°0
107 °
Rock Port, Tuesday, 18 August
Overcast. High 107°, low 69°.
Pressure29.80 inHg
Wind11.3 mph S
Humidity32%
Visibility—
Dew point59°
Wed, 19116° / 76°0
116 °
Rock Port, Wednesday, 19 August
Clear. High 116°, low 76°.
Pressure29.74 inHg
Wind15.7 mph SW
Humidity12%
Visibility—
Dew point44°
Thu, 20111° / 80°0
111 °
Rock Port, Thursday, 20 August
Clear. High 111°, low 80°.
Pressure29.74 inHg
Wind14.6 mph NE
Humidity13%
Visibility—
Dew point44°
Fri, 21101° / 73°0
101 °
Rock Port, Friday, 21 August
Overcast. High 101°, low 73°.
Pressure29.85 inHg
Wind16.3 mph E
Humidity31%
Visibility—
Dew point56°
Sat, 22115° / 77°0.01
115 °
Rock Port, Saturday, 22 August
Light rain. High 115°, low 77°.
Pressure29.71 inHg
Wind21.7 mph S
Humidity13%
Visibility—
Dew point47°
Sun, 23105° / 72°0.2
105 °
Rock Port, Sunday, 23 August
Rain. High 105°, low 72°.
Pressure29.77 inHg
Wind15.4 mph S
Humidity21%
Visibility—
Dew point53°
Mon, 24103° / 69°0.01
103 °
Rock Port, Monday, 24 August
Light rain. High 103°, low 69°.
Pressure29.91 inHg
Wind11.7 mph SE
Humidity45%
Visibility—
Dew point63°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2585° / 67°0.14
85 °
Rock Port, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high85°
Average low67°
Average precipitation0.14 in
Chance of precipitation25%
Record high101° (2003)
Record low54° (2015)
Wed, 2685° / 68°0.17
85 °
Rock Port, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high85°
Average low68°
Average precipitation0.17 in
Chance of precipitation33%
Record high98° (1976)
Record low54° (2025)
Thu, 2785° / 68°0.06
85 °
Rock Port, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high85°
Average low68°
Average precipitation0.06 in
Chance of precipitation27%
Record high99° (1970)
Record low53° (1967)
Fri, 2885° / 66°0.11
85 °
Rock Port, Friday, 28 August
Climate normal for this date — 60-year average.
Average high85°
Average low66°
Average precipitation0.11 in
Chance of precipitation32%
Record high101° (1984)
Record low50° (1986)
Sat, 2985° / 66°0.11
85 °
Rock Port, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high85°
Average low66°
Average precipitation0.11 in
Chance of precipitation28%
Record high100° (1984)
Record low55° (1974)
Sun, 3084° / 66°0.1
84 °
Rock Port, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high84°
Average low66°
Average precipitation0.1 in
Chance of precipitation30%
Record high100° (2013)
Record low52° (2009)
Mon, 3184° / 66°0.13
84 °
Rock Port, Monday, 31 August
Climate normal for this date — 60-year average.
Average high84°
Average low66°
Average precipitation0.13 in
Chance of precipitation30%
Record high100° (1990)
Record low50° (2009)
Tue, 0183° / 66°0.09
83 °
Rock Port, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high83°
Average low66°
Average precipitation0.09 in
Chance of precipitation30%
Record high98° (2011)
Record low51° (1965)
Wed, 0283° / 65°0.09
83 °
Rock Port, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high83°
Average low65°
Average precipitation0.09 in
Chance of precipitation33%
Record high97° (2000)
Record low53° (1974)
Thu, 0383° / 65°0.09
83 °
Rock Port, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high83°
Average low65°
Average precipitation0.09 in
Chance of precipitation22%
Record high94° (1990)
Record low43° (1974)
Fri, 0482° / 65°0.12
82 °
Rock Port, Friday, 4 September
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.12 in
Chance of precipitation23%
Record high97° (2012)
Record low44° (1974)
Sat, 0582° / 65°0.09
82 °
Rock Port, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high82°
Average low65°
Average precipitation0.09 in
Chance of precipitation20%
Record high96° (1990)
Record low45° (1962)
Sun, 0683° / 64°0.09
83 °
Rock Port, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high83°
Average low64°
Average precipitation0.09 in
Chance of precipitation23%
Record high99° (1990)
Record low49° (2025)
Mon, 0782° / 64°0.22
82 °
Rock Port, Monday, 7 September
Climate normal for this date — 60-year average.
Average high82°
Average low64°
Average precipitation0.22 in
Chance of precipitation42%
Record high98° (2013)
Record low49° (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 Rock Port, 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 Rock Port, 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.