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Clayton, MO

81°F
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Clayton, MO Weather
Today WinterCast Local {stormName} Tracker Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

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Today Hourly 10-Day Radar MinuteCast®

Monthly

Air Quality Health & Activities
Extreme Heat Watch

July

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
28
Mostly sunny and humid
97°
75°
29
Sunshine and hot
96°
75°
30
Hazy and toasty conditions
98°
76°
1
Hazy sunshine and hot
98°
77°
2
A t-storm around in the p.m.
95°
76°
3
Hot; a stray p.m. t-storm
96°
76°
4
A shower possible; hot, humid
94°
75°
5
A thunderstorm in spots
91°
76°
6
Sunny to partly cloudy
92°
73°
7
Mostly sunny and less humid
90°
72°
8
Sunny
91°
71°
9
A little afternoon rain
92°
72°
10
Mostly sunny and humid
89°
71°
11
Mostly cloudy and humid
93°
74°
12
A t-storm around in the p.m.
91°
74°
13
A little morning rain
92°
68°
14
Plenty of sunshine
85°
67°
15
Sunshine
85°
68°
16
Plenty of sunshine
86°
68°
17
Plenty of sunshine
89°
71°
18
Mostly cloudy
92°
75°
19
Cloudy, a t-shower in spots
92°
75°
20
An afternoon thunderstorm
90°
74°
21
An afternoon thunderstorm
91°
75°
22
A few showers in the morning
87°
75°
23
Plenty of sun
93°
76°
24
Mostly sunny and hot
92°
75°
25
Mostly cloudy and humid
93°
74°
26
Mostly cloudy and humid
92°
75°
27
Mostly sunny and humid
92°
75°
28
Partly sunny
93°
76°
29
Hot and humid with some sun
93°
76°
30
Mostly sunny and less humid
92°
75°
31
Clouds and sun; low humidity
92°
74°
1
A shower and thunderstorm
91°
76°

Temperature Graph

°F
100° 92° 84° 76° 68° Jul
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

July Weather in Clayton

Clayton's July 2026 forecast shows daily high temperatures ranging from 85° to 98°, with overnight lows between 67° and 77°. The average high for July is 92° with an average low of 74°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Clayton. See also: August | September | October.

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World North America United States Missouri Clayton

Weather Near Clayton:

  • O'Fallon, MO
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