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As of 05:54 CDT

Weather in Herculaneum, MO

56°Current weather

Herculaneum, Thursday, 22 October, 05:54

Clear. Feels like 55°. High 77°, low 50°.

Pressure30.24 inHg
Wind1.2 mph W
Humidity92%
Visibility6.2 mi
Dew point53°
Fri, 2376° / 48°0Clear
76 °Clear

Herculaneum, Friday, 23 October

Clear. High 76°, low 48°.

Pressure30.27 inHg
Wind4.9 mph SE
Humidity45%
Visibility6.2 mi
Dew point48°
Sat, 2473° / 50°0Overcast
73 °Overcast

Herculaneum, Saturday, 24 October

Overcast. High 73°, low 50°.

Pressure30.36 inHg
Wind4.7 mph SE
Humidity49%
Visibility6.2 mi
Dew point49°
Sun, 2575° / 51°0Overcast
75 °Overcast

Herculaneum, Sunday, 25 October

Overcast. High 75°, low 51°.

Pressure30.39 inHg
Wind2.1 mph S
Humidity47%
Visibility6.2 mi
Dew point51°
Mon, 2673° / 54°0Overcast
73 °Overcast

Herculaneum, Monday, 26 October

Overcast. High 73°, low 54°.

Pressure30.33 inHg
Wind4 mph SE
Humidity41%
Visibility—
Dew point45°
Tue, 2772° / 52°0Overcast
72 °Overcast

Herculaneum, Tuesday, 27 October

Overcast. High 72°, low 52°.

Pressure30.24 inHg
Wind4.7 mph S
Humidity43%
Visibility—
Dew point46°
Wed, 2871° / 53°0Partly cloudy
71 °Partly cloudy

Herculaneum, Wednesday, 28 October

Partly cloudy. High 71°, low 53°.

Pressure30.18 inHg
Wind6.9 mph W
Humidity50%
Visibility—
Dew point47°
Thu, 2974° / 53°0Overcast
74 °Overcast

Herculaneum, Thursday, 29 October

Overcast. High 74°, low 53°.

Pressure30.09 inHg
Wind6.6 mph SE
Humidity45%
Visibility—
Dew point47°
Fri, 3079° / 61°0.01Light rain
79 °Light rain

Herculaneum, Friday, 30 October

Light rain. High 79°, low 61°.

Pressure29.88 inHg
Wind10.6 mph SW
Humidity41%
Visibility—
Dew point46°
Sat, 3171° / 60°0.55Rain
71 °Rain

Herculaneum, Saturday, 31 October

Rain. High 71°, low 60°.

Pressure29.77 inHg
Wind13.2 mph S
Humidity93%
Visibility—
Dew point59°
Sun, 0162° / 54°0.02Light rain
62 °Light rain

Herculaneum, Sunday, 1 November

Light rain. High 62°, low 54°.

Pressure29.91 inHg
Wind8.6 mph NE
Humidity59%
Visibility—
Dew point46°
Mon, 0262° / 51°0.2Rain
62 °Rain

Herculaneum, Monday, 2 November

Rain. High 62°, low 51°.

Pressure30.09 inHg
Wind10.8 mph NE
Humidity67%
Visibility—
Dew point45°
Tue, 0362° / 45°0Mostly clear
62 °Mostly clear

Herculaneum, Tuesday, 3 November

Mostly clear. High 62°, low 45°.

Pressure30.27 inHg
Wind11 mph NE
Humidity41%
Visibility—
Dew point33°
Wed, 0451° / 46°0.49Rain
51 °Rain

Herculaneum, Wednesday, 4 November

Rain. High 51°, low 46°.

Pressure30.27 inHg
Wind12.1 mph NE
Humidity79%
Visibility—
Dew point41°
Thu, 0547° / 46°0.31Light rain
47 °Light rain

Herculaneum, Thursday, 5 November

Light rain. High 47°, low 46°.

Pressure30.18 inHg
Wind10.9 mph NE
Humidity94%
Visibility—
Dew point44°
Fri, 0653° / 48°0.02Light rain
53 °Light rain

Herculaneum, Friday, 6 November

Light rain. High 53°, low 48°.

Pressure30.21 inHg
Wind4.8 mph N
Humidity92%
Visibility—
Dew point49°

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.