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St. Clair, MO

71°F
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St. Clair

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71°
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St. Clair, 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

June

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
31
79°
68°
1
86°
68°
2
82°
59°
3
82°
54°
4
86°
57°
5
A t-storm around in the p.m.
86°
69°
6
Humid with a thunderstorm
88°
72°
7
A shower and t-storm; humid
81°
71°
8
A shower and t-storm; humid
81°
69°
9
A t-storm around in the a.m.
86°
69°
10
Strong afternoon t-storms
93°
71°
11
Mostly sunny and hot
93°
70°
12
Mostly sunny
89°
69°
13
A t-storm around in the p.m.
90°
69°
14
Mostly sunny and less humid
86°
66°
15
Mostly cloudy, afternoon rain
88°
65°
16
Cloudy, a little rain; humid
86°
62°
17
A blanket of clouds
85°
64°
18
Humid; afternoon rain
87°
66°
19
Cloudy and humid
87°
68°
20
Humid with a t-storm possible
89°
68°
21
A thunderstorm possible
89°
67°
22
Clouds and sunshine
83°
68°
23
Sunshine; warmer, humid
89°
69°
24
Sunny and humid
91°
70°
25
A shower and thunderstorm
92°
70°
26
Cloudy, hot and very humid
92°
69°
27
Cloudy and humid
90°
69°
28
Cloudy and humid
89°
70°
29
Humid with a stray t-storm
89°
70°
30
Humid; a morning shower
86°
69°
1
Mostly sunny and humid
86°
68°
2
Mostly sunny
87°
69°
3
Partly sunny
86°
69°
4
Sunny
86°
67°

Temperature Graph

°F
100° 90° 80° 70° 60° Jun
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
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo

June Weather in St. Clair

St. Clair's June 2026 forecast shows daily high temperatures ranging from 81° to 93°, with overnight lows between 62° and 72°. The average high for June is 88° with an average low of 68°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how June weather will actually feel in St. Clair. See also: July | August | September.

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World North America United States Missouri St. Clair

Weather Near St. Clair:

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