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St. Louis, LA

78°F
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St. Louis

Louisiana

78°
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St. Louis, LA Weather
Today WinterCast Local {stormName} Tracker Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

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Monthly

 Air Quality Health & Activities

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
94°
73°
27
94°
76°
28
94°
75°
29
94°
76°
30
94°
78°
31
96°
76°
1
Humid with a t-storm in spots
97°
72°
2
Times of clouds and sun
93°
68°
3
Mostly sunny
93°
72°
4
A t-storm around in the a.m.
93°
74°
5
Mostly sunny
94°
73°
6
A t-storm around in the p.m.
95°
74°
7
A t-storm around in the p.m.
94°
72°
8
Mostly sunny
93°
72°
9
A t-storm around in the p.m.
94°
73°
10
A little rain in the morning
95°
73°
11
Rain at times
93°
72°
12
Rain
94°
74°
13
Partly sunny with a shower
95°
73°
14
Partly sunny
94°
72°
15
A morning thunderstorm
94°
72°
16
Sunny and less humid
90°
69°
17
Mostly sunny and humid
95°
74°
18
Mostly sunny and humid
94°
74°
19
Sunny and humid
95°
75°
20
Humid with partial sunshine
95°
74°
21
Humid; an afternoon t-storm
94°
75°
22
Humid; a shower in the a.m.
94°
75°
23
Decreasing clouds and humid
93°
74°
24
Brilliant sunshine and humid
94°
74°
25
Sunny and humid
94°
75°
26
Sunny and humid
93°
74°
27
Humid with sunshine
94°
74°
28
Humid with plenty of sunshine
94°
73°
29
Humid with plenty of sunshine
95°
73°
30
Humid; an afternoon t-storm
94°
74°
31
Humid with clouds and sun
93°
73°
1
Mostly sunny and humid
92°
72°
2
Humid with sunshine
93°
74°
3
Decreasing clouds
94°
74°
4
Rather cloudy and humid
95°
73°
5
Clouds and sun; less humid
92°
73°

Temperature Graph

°F
100° 92° 84° 76° 68° Aug
Today 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 Saint Louis

Saint Louis's August 2026 forecast shows daily high temperatures ranging from 90° to 97°, with overnight lows between 68° and 75°. The average high for August is 94° with an average low of 73°. 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 Saint Louis. See also: September | October | November.

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Weather Near St. Louis:

  • Lafayette, LA
  • New Iberia, LA
  • Opelousas, LA
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