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As of 16:57 CDT

Weather in Herculaneum, MO

58°Current weather

Herculaneum, Saturday, 17 October, 16:57

Clear. Feels like 56°. High 59°, low 42°.

Pressure30.47 inHg
Wind3.6 mph NE
Humidity46%
Visibility6.2 mi
Dew point38°
Sun, 1866° / 45°0Clear
66 °Clear

Herculaneum, Sunday, 18 October

Clear. High 66°, low 45°.

Pressure30.47 inHg
Wind5.7 mph SE
Humidity50%
Visibility6.2 mi
Dew point40°
Mon, 1967° / 44°0Overcast
67 °Overcast

Herculaneum, Monday, 19 October

Overcast. High 67°, low 44°.

Pressure30.39 inHg
Wind1.9 mph SE
Humidity51%
Visibility6.2 mi
Dew point45°
Tue, 2069° / 43°0Clear
69 °Clear

Herculaneum, Tuesday, 20 October

Clear. High 69°, low 43°.

Pressure30.36 inHg
Wind1.9 mph SE
Humidity49%
Visibility3.0 mi
Dew point46°
Wed, 2171° / 53°0Clear
71 °Clear

Herculaneum, Wednesday, 21 October

Clear. High 71°, low 53°.

Pressure30.27 inHg
Wind0.7 mph NE
Humidity49%
Visibility6.2 mi
Dew point48°
Thu, 2272° / 48°0Clear
72 °Clear

Herculaneum, Thursday, 22 October

Clear. High 72°, low 48°.

Pressure30.27 inHg
Wind4.1 mph N
Humidity45%
Visibility—
Dew point46°
Fri, 2377° / 52°0Clear
77 °Clear

Herculaneum, Friday, 23 October

Clear. High 77°, low 52°.

Pressure30.21 inHg
Wind6 mph SE
Humidity37%
Visibility—
Dew point44°
Sat, 2479° / 54°0Overcast
79 °Overcast

Herculaneum, Saturday, 24 October

Overcast. High 79°, low 54°.

Pressure30.27 inHg
Wind5.5 mph S
Humidity22%
Visibility—
Dew point33°
Sun, 2580° / 58°0Overcast
80 °Overcast

Herculaneum, Sunday, 25 October

Overcast. High 80°, low 58°.

Pressure30.21 inHg
Wind9.3 mph SW
Humidity26%
Visibility—
Dew point39°
Mon, 2680° / 61°0Overcast
80 °Overcast

Herculaneum, Monday, 26 October

Overcast. High 80°, low 61°.

Pressure30.15 inHg
Wind8.2 mph NW
Humidity33%
Visibility—
Dew point46°
Tue, 2766° / 54°0.05Light rain
66 °Light rain

Herculaneum, Tuesday, 27 October

Light rain. High 66°, low 54°.

Pressure30.21 inHg
Wind11.2 mph NE
Humidity77%
Visibility—
Dew point58°
Wed, 2872° / 48°0Mostly clear
72 °Mostly clear

Herculaneum, Wednesday, 28 October

Mostly clear. High 72°, low 48°.

Pressure30.21 inHg
Wind10 mph SE
Humidity51%
Visibility—
Dew point47°
Thu, 2977° / 59°0.02Light rain
77 °Light rain

Herculaneum, Thursday, 29 October

Light rain. High 77°, low 59°.

Pressure29.94 inHg
Wind10.9 mph SW
Humidity50%
Visibility—
Dew point52°
Fri, 3083° / 65°0.01Light rain
83 °Light rain

Herculaneum, Friday, 30 October

Light rain. High 83°, low 65°.

Pressure29.85 inHg
Wind14.7 mph S
Humidity63%
Visibility—
Dew point58°
Sat, 3175° / 63°0.2Light rain
75 °Light rain

Herculaneum, Saturday, 31 October

Light rain. High 75°, low 63°.

Pressure29.91 inHg
Wind17.5 mph S
Humidity78%
Visibility—
Dew point66°
Sun, 0181° / 60°0.12Light rain
81 °Light rain

Herculaneum, Sunday, 1 November

Light rain. High 81°, low 60°.

Pressure30.06 inHg
Wind10.9 mph S
Humidity58%
Visibility—
Dew point62°

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.