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Potosi, MO

96°F
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Potosi

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Potosi, MO Weather
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Today Hourly 10-Day Radar MinuteCast®

Monthly

Air Quality Health & Activities
2
Extreme Heat Warning

August

January February March April May June July August September October November December

2026

2025 2026 2027

10-Day

S
M
T
W
T
F
S
26
Sunny, hot and less humid
90°
72°
27
Sunny and hot
92°
72°
28
Sunshine; hot, less humid
91°
73°
29
Hot with sunshine
92°
71°
30
Becoming cloudy and hot
91°
72°
31
A t-storm around in the a.m.
91°
71°
1
Mostly sunny
89°
70°
2
Sun followed by clouds
85°
69°
3
A shower and thunderstorm
85°
70°
4
A morning thunderstorm
82°
70°
5
Humid; a shower in the p.m.
82°
69°
6
Mostly sunny and humid
85°
70°
7
Humid with plenty of sunshine
87°
70°
8
Partly sunny and humid
87°
69°
9
Mostly sunny and humid
88°
70°
10
Humid; an afternoon t-storm
88°
70°
11
A thunderstorm in spots
86°
69°
12
Humid with partial sunshine
85°
69°
13
Humid with increasing clouds
87°
68°
14
Mostly sunny
90°
68°
15
A stray afternoon t-storm
90°
69°
16
A couple of thunderstorms
88°
68°
17
Humid with clouds and sun
89°
67°
18
Humid with a t-storm in spots
86°
68°
19
Humid; an afternoon shower
88°
61°
20
Not as warm with a shower
82°
60°
21
Intervals of bright sunshine
80°
59°
22
Brilliant sunshine
79°
61°
23
Plenty of sun
80°
60°
24
Decreasing clouds
82°
61°
25
Plenty of sunshine
81°
66°
26
Sunshine
85°
63°
27
Mostly sunny
88°
66°
28
Partly sunny
88°
67°
29
Sunny and less humid
89°
66°
30
Mostly sunny
88°
66°
31
Mostly sunny
87°
65°
1
Mostly cloudy
84°
63°
2
Considerable cloudiness
83°
58°
3
Morning thunderstorms
77°
57°
4
Partly sunny and less humid
78°
61°
5
Mostly sunny
81°
65°

Temperature Graph

°F
90° 82° 74° 66° 58° Aug
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo

August Weather in Potosi

Potosi's August 2026 forecast shows daily high temperatures ranging from 77° to 92°, with overnight lows between 57° and 73°. The average high for August is 86° with an average low of 67°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Potosi. See also: September | October | November.

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Weather Near Potosi:

  • O'Fallon, MO
  • St. Charles, MO
  • St. Louis, MO
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