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As of 12:20 CST

Weather in Herculaneum, MO

42°Current weather

Herculaneum, Friday, 13 November, 12:20

Overcast. Feels like 36°. High 43°, low 36°.

Pressure30.12 inHg
Wind10.6 mph N
Humidity58%
Visibility6.2 mi
Dew point30°
Sat, 1449° / 32°0Clear
49 °Clear

Herculaneum, Saturday, 14 November

Clear. High 49°, low 32°.

Pressure30.33 inHg
Wind3 mph N
Humidity56%
Visibility6.2 mi
Dew point26°
Sun, 1551° / 31°0Overcast
51 °Overcast

Herculaneum, Sunday, 15 November

Overcast. High 51°, low 31°.

Pressure30.45 inHg
Wind1.9 mph E
Humidity50%
Visibility6.2 mi
Dew point29°
Mon, 1654° / 29°0Clear
54 °Clear

Herculaneum, Monday, 16 November

Clear. High 54°, low 29°.

Pressure30.53 inHg
Wind1.9 mph SE
Humidity46%
Visibility5.0 mi
Dew point32°
Tue, 1755° / 35°0Mostly clear
55 °Mostly clear

Herculaneum, Tuesday, 17 November

Mostly clear. High 55°, low 35°.

Pressure30.47 inHg
Wind4.7 mph SE
Humidity51%
Visibility6.2 mi
Dew point37°
Wed, 1862° / 38°0Overcast
62 °Overcast

Herculaneum, Wednesday, 18 November

Overcast. High 62°, low 38°.

Pressure30.33 inHg
Wind9.2 mph S
Humidity46%
Visibility—
Dew point37°
Thu, 1959° / 48°0.02Light rain
59 °Light rain

Herculaneum, Thursday, 19 November

Light rain. High 59°, low 48°.

Pressure30.27 inHg
Wind8 mph SW
Humidity65%
Visibility—
Dew point46°
Fri, 2068° / 54°0Overcast
68 °Overcast

Herculaneum, Friday, 20 November

Overcast. High 68°, low 54°.

Pressure30.33 inHg
Wind9 mph SE
Humidity59%
Visibility—
Dew point50°
Sat, 2170° / 54°0.02Light rain
70 °Light rain

Herculaneum, Saturday, 21 November

Light rain. High 70°, low 54°.

Pressure29.85 inHg
Wind19.2 mph S
Humidity34%
Visibility—
Dew point38°
Sun, 2259° / 43°0.06Light rain
59 °Light rain

Herculaneum, Sunday, 22 November

Light rain. High 59°, low 43°.

Pressure30.12 inHg
Wind10.4 mph SW
Humidity45%
Visibility—
Dew point31°
Mon, 2348° / 34°0Mostly clear
48 °Mostly clear

Herculaneum, Monday, 23 November

Mostly clear. High 48°, low 34°.

Pressure30.21 inHg
Wind12 mph N
Humidity37%
Visibility—
Dew point22°
Tue, 2431° / 21°0.01Light snow
31 °Light snow

Herculaneum, Tuesday, 24 November

Light snow. High 31°, low 21°.

Pressure30.39 inHg
Wind15 mph NW
Humidity28%
Visibility—
Dew point-1°
Wed, 2537° / 17°0Clear
37 °Clear

Herculaneum, Wednesday, 25 November

Clear. High 37°, low 17°.

Pressure30.24 inHg
Wind12.1 mph NW
Humidity28%
Visibility—
Dew point3°
Thu, 2644° / 18°0Clear
44 °Clear

Herculaneum, Thursday, 26 November

Clear. High 44°, low 18°.

Pressure30.21 inHg
Wind10.2 mph SW
Humidity25%
Visibility—
Dew point4°
Fri, 2750° / 32°0Clear
50 °Clear

Herculaneum, Friday, 27 November

Clear. High 50°, low 32°.

Pressure29.97 inHg
Wind10.9 mph W
Humidity40%
Visibility—
Dew point22°
Sat, 2853° / 28°0Clear
53 °Clear

Herculaneum, Saturday, 28 November

Clear. High 53°, low 28°.

Pressure30.09 inHg
Wind5.8 mph S
Humidity40%
Visibility—
Dew point22°

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.