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South Troy, MO

80°F
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South Troy

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South Troy, 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

May

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
81°
54°
27
84°
63°
28
61°
55°
29
64°
46°
30
66°
39°
1
64°
43°
2
63°
41°
3
81°
39°
4
Breezy with clouds and sun
81°
54°
5
Rain and a t-storm; cooler
58°
46°
6
Cloudy, cool; a p.m. shower
61°
42°
7
Partly sunny
66°
44°
8
Mostly cloudy with a shower
73°
47°
9
Partly sunny and delightful
78°
56°
10
Some rain and a thunderstorm
70°
44°
11
Partly sunny and less humid
66°
43°
12
Mostly sunny and warmer
73°
50°
13
A strong afternoon t-storm
76°
53°
14
Sunny and less humid
76°
49°
15
Plenty of sunshine
74°
52°
16
A t-storm around in the a.m.
77°
57°
17
Cloudy, a shower and t-storm
76°
53°
18
Clouds and sun with a shower
75°
57°
19
A little rain in the morning
79°
56°
20
Plenty of sunshine
74°
52°
21
A shower in the afternoon
77°
50°
22
Plenty of sun
70°
49°
23
Cloudy most of the time
71°
49°
24
Mostly cloudy
72°
51°
25
Rain
72°
51°
26
Mostly sunny
71°
50°
27
Partly sunny
73°
51°
28
A bit of afternoon rain
73°
57°
29
Partial sunshine
74°
56°
30
T-storms in the afternoon
79°
61°
31
Cloudy with rain tapering off
75°
59°
1
Less humid with plenty of sun
75°
54°
2
Sunny
76°
55°
3
Partly sunny
78°
59°
4
Mostly cloudy
78°
63°
5
A shower and thunderstorm
81°
63°
6
A little afternoon rain
79°
64°

Temperature Graph

°F
90° 78° 66° 54° 42° May
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

May Weather in South Troy

South Troy's May 2026 forecast shows daily high temperatures ranging from 58° to 81°, with overnight lows between 42° and 64°. The average high for May is 74° with an average low of 53°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in South Troy. See also: June | July | August.

Further Ahead

June 2026

July 2026

August 2026

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World North America United States Missouri South Troy

Weather Near South Troy:

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