Monthly outlook for Potosi, MO: average high 102.7°, average low 74.7°. That is 9.7° above the climate normal for August. Precipitation is expected on 3 days (about 0.4 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 20 August (113°), the coolest 15 August (67.7°).
102.7°/74.7°
Average high / low
+9.7°
Above normal
3 / 5
Wet days / normal
0.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
98.5°
85.3°
+7.3°
19 August – 28 August
109.8°
85.4°
+13.5°
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
Mon, 10100° / 75°0
100 °
Potosi, Monday, 10 August
Partly cloudy. High 100°, low 75°.
Pressure29.97 inHg
Wind10.1 mph SW
Humidity36%
Visibility6.2 mi
Dew point65°
Tue, 11101° / 75°0
101 °
Potosi, Tuesday, 11 August
Clear. High 101°, low 75°.
Pressure29.91 inHg
Wind10.2 mph SW
Humidity33%
Visibility6.2 mi
Dew point63°
Wed, 12103° / 73°0.02
103 °
Potosi, Wednesday, 12 August
Light rain. High 103°, low 73°.
Pressure29.85 inHg
Wind9.1 mph W
Humidity43%
Visibility6.2 mi
Dew point66°
Thu, 1398° / 69°0.23
98 °
Potosi, Thursday, 13 August
Light rain. High 98°, low 69°.
Pressure29.88 inHg
Wind11 mph E
Humidity46%
Visibility—
Dew point65°
Fri, 1491° / 70°0
91 °
Potosi, Friday, 14 August
Overcast. High 91°, low 70°.
Pressure29.97 inHg
Wind10.8 mph NE
Humidity48%
Visibility—
Dew point66°
Sat, 15104° / 68°0
104 °
Potosi, Saturday, 15 August
Light rain. High 104°, low 68°.
Pressure30.06 inHg
Wind8.3 mph E
Humidity35%
Visibility—
Dew point61°
Sun, 16100° / 75°0
100 °
Potosi, Sunday, 16 August
Mostly clear. High 100°, low 75°.
Pressure30.00 inHg
Wind10.2 mph W
Humidity31%
Visibility—
Dew point61°
Mon, 1794° / 72°0.11
94 °
Potosi, Monday, 17 August
Light rain. High 94°, low 72°.
Pressure30.03 inHg
Wind7.2 mph E
Humidity54%
Visibility—
Dew point69°
Tue, 18100° / 70°0.02
100 °
Potosi, Tuesday, 18 August
Light rain. High 100°, low 70°.
Pressure29.94 inHg
Wind6.5 mph SE
Humidity44%
Visibility—
Dew point67°
Wed, 19111° / 79°0
111 °
Potosi, Wednesday, 19 August
Clear. High 111°, low 79°.
Pressure29.88 inHg
Wind11 mph SE
Humidity21%
Visibility—
Dew point55°
Thu, 20113° / 84°0
113 °
Potosi, Thursday, 20 August
Clear. High 113°, low 84°.
Pressure29.85 inHg
Wind10.8 mph W
Humidity18%
Visibility—
Dew point54°
Fri, 21113° / 82°0.01
113 °
Potosi, Friday, 21 August
Light rain. High 113°, low 82°.
Pressure29.85 inHg
Wind11.9 mph SE
Humidity15%
Visibility—
Dew point50°
Sat, 22110° / 81°0
110 °
Potosi, Saturday, 22 August
Partly cloudy. High 110°, low 81°.
Pressure29.88 inHg
Wind10.8 mph SW
Humidity23%
Visibility—
Dew point58°
Sun, 23108° / 74°0.04
108 °
Potosi, Sunday, 23 August
Light rain. High 108°, low 74°.
Pressure29.88 inHg
Wind8.2 mph SW
Humidity25%
Visibility—
Dew point60°
Mon, 24103° / 77°0
103 °
Potosi, Monday, 24 August
Clear. High 103°, low 77°.
Pressure29.97 inHg
Wind6.5 mph NE
Humidity31%
Visibility—
Dew point62°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2586° / 68°0.06
86 °
Potosi, 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 °
Potosi, 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 °
Potosi, 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 °
Potosi, 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 °
Potosi, 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 °
Potosi, 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 °
Potosi, 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 °
Potosi, 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 °
Potosi, 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 °
Potosi, 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 °
Potosi, 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 °
Potosi, 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 °
Potosi, 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 °
Potosi, 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 Potosi, 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 Potosi, 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.