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As of 13:17 CDT

Weather in Herculaneum, MO

64°Current weather

Herculaneum, Sunday, 18 October, 13:17

Clear. Feels like 63°. High 65°, low 39°.

Pressure30.42 inHg
Wind5.4 mph SE
Humidity44%
Visibility6.2 mi
Dew point43°
Mon, 1968° / 41°0Partly cloudy
68 °Partly cloudy

Herculaneum, Monday, 19 October

Partly cloudy. High 68°, low 41°.

Pressure30.39 inHg
Wind1.8 mph S
Humidity51%
Visibility6.2 mi
Dew point46°
Tue, 2069° / 46°0Clear
69 °Clear

Herculaneum, Tuesday, 20 October

Clear. High 69°, low 46°.

Pressure30.36 inHg
Wind1.4 mph E
Humidity48%
Visibility1.4 mi
Dew point45°
Wed, 2170° / 47°0Clear
70 °Clear

Herculaneum, Wednesday, 21 October

Clear. High 70°, low 47°.

Pressure30.30 inHg
Wind1.1 mph SE
Humidity51%
Visibility6.2 mi
Dew point49°
Thu, 2270° / 49°0Clear
70 °Clear

Herculaneum, Thursday, 22 October

Clear. High 70°, low 49°.

Pressure30.27 inHg
Wind2.4 mph NE
Humidity56%
Visibility6.2 mi
Dew point51°
Fri, 2369° / 50°0Clear
69 °Clear

Herculaneum, Friday, 23 October

Clear. High 69°, low 50°.

Pressure30.27 inHg
Wind6.9 mph SE
Humidity52%
Visibility—
Dew point47°
Sat, 2480° / 55°0Overcast
80 °Overcast

Herculaneum, Saturday, 24 October

Overcast. High 80°, low 55°.

Pressure30.27 inHg
Wind9.7 mph S
Humidity28%
Visibility—
Dew point41°
Sun, 2575° / 60°0Overcast
75 °Overcast

Herculaneum, Sunday, 25 October

Overcast. High 75°, low 60°.

Pressure30.36 inHg
Wind7 mph NE
Humidity44%
Visibility—
Dew point49°
Mon, 2675° / 55°0Overcast
75 °Overcast

Herculaneum, Monday, 26 October

Overcast. High 75°, low 55°.

Pressure30.27 inHg
Wind7.6 mph S
Humidity31%
Visibility—
Dew point40°
Tue, 2774° / 54°0Overcast
74 °Overcast

Herculaneum, Tuesday, 27 October

Overcast. High 74°, low 54°.

Pressure30.21 inHg
Wind9.4 mph SE
Humidity25%
Visibility—
Dew point34°
Wed, 2878° / 61°0.21Light rain
78 °Light rain

Herculaneum, Wednesday, 28 October

Light rain. High 78°, low 61°.

Pressure29.94 inHg
Wind13 mph S
Humidity55%
Visibility—
Dew point59°
Thu, 2981° / 62°0.02Light rain
81 °Light rain

Herculaneum, Thursday, 29 October

Light rain. High 81°, low 62°.

Pressure29.80 inHg
Wind9.3 mph W
Humidity53%
Visibility—
Dew point58°
Fri, 3087° / 63°0Overcast
87 °Overcast

Herculaneum, Friday, 30 October

Overcast. High 87°, low 63°.

Pressure29.71 inHg
Wind14.7 mph S
Humidity39%
Visibility—
Dew point55°
Sat, 3169° / 50°0.09Light rain
69 °Light rain

Herculaneum, Saturday, 31 October

Light rain. High 69°, low 50°.

Pressure29.85 inHg
Wind16 mph W
Humidity29%
Visibility—
Dew point26°
Sun, 0158° / 41°0Clear
58 °Clear

Herculaneum, Sunday, 1 November

Clear. High 58°, low 41°.

Pressure30.27 inHg
Wind10.5 mph W
Humidity29%
Visibility—
Dew point22°
Mon, 0264° / 39°0Clear
64 °Clear

Herculaneum, Monday, 2 November

Clear. High 64°, low 39°.

Pressure30.39 inHg
Wind6.6 mph SE
Humidity27%
Visibility—
Dew point24°

About the monthly outlook

How accurate is a 30-day forecast?

The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Herculaneum, MO are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.

What does "above normal" mean?

We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.

Where do the 66-year records come from?

They are real temperature extremes recorded in Herculaneum, MO since 1960: the highest and lowest reading for each calendar date, with the year it happened.

How often is it updated?

The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.