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Herculaneum, MO

81°F
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Herculaneum

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Herculaneum, 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
80°
65°
1
Mostly cloudy and humid
82°
63°
2
Sunny and less humid
80°
53°
3
Mostly sunny
82°
59°
4
Partial sunshine
86°
62°
5
A shower and thunderstorm
87°
69°
6
A shower and t-storm; humid
86°
69°
7
A shower and t-storm; humid
84°
70°
8
Strong t-storms, mainly early
85°
66°
9
Partly sunny and humid
86°
65°
10
Humid; a morning shower
85°
67°
11
A morning thunderstorm or two
87°
67°
12
A little morning rain; humid
85°
64°
13
Humid with partial sunshine
84°
65°
14
A shower and thunderstorm
86°
62°
15
Partly sunny and humid
87°
66°
16
Occasional rain
84°
63°
17
Considerable cloudiness
80°
64°
18
Cloudy with a little rain
80°
66°
19
Morning rain, then t-storms
81°
67°
20
A few morning showers
81°
67°
21
Turning cloudy and humid
82°
66°
22
A shower and thunderstorm
84°
67°
23
Less humid with sunshine
82°
64°
24
Mostly sunny
84°
67°
25
Sunny
85°
68°
26
Humid with sunny intervals
87°
69°
27
A shower and t-storm; humid
87°
68°
28
A couple of morning showers
84°
69°
29
A shower and thunderstorm
83°
68°
30
Cloudy
84°
67°
1
Mostly cloudy, p.m. t-storms
81°
66°
2
Mostly cloudy and humid
83°
69°
3
A shower and t-storm; humid
87°
69°
4
Sunny and less humid
85°
65°

Temperature Graph

°F
90° 82° 74° 66° 58° 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 Herculaneum

Herculaneum's June 2026 forecast shows daily high temperatures ranging from 80° to 87°, with overnight lows between 53° and 70°. The average high for June is 84° with an average low of 66°. 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 Herculaneum. See also: July | August | September.

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World North America United States Missouri Herculaneum

Weather Near Herculaneum:

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