Herculaneum, MO Weather & Climate Normals
What a normal year in Herculaneum actually looks like
On the 30-year record NOAA keeps for Herculaneum, MO, the comfort score comes out to 48/100, strongly seasonal: Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. Only 5 months a year land in the 55–75°F range this site treats as mild.
How much Herculaneum's weather actually swings
Average temperatures in Herculaneum run from 32°F in Jan up to 78°F in Jul, a 46.1°F seasonal swing, one of the widest gaps in this dataset.
Herculaneum, month by month
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 41°F | 22°F | 2.68in | 2.1in |
| Feb | 46°F | 25°F | 2.51in | 2.7in |
| Mar | 56°F | 34°F | 4in | 1.1in |
| Apr | 68°F | 44°F | 4.91in | 0.2in |
| May | 76°F | 54°F | 4.76in | 0in |
| Jun | 85°F | 63°F | 4.74in | 0in |
| Jul | 88°F | 67°F | 3.83in | 0in |
| Aug | 87°F | 65°F | 3.59in | 0in |
| Sep | 81°F | 57°F | 3.38in | 0in |
| Oct | 70°F | 46°F | 2.83in | 0in |
| Nov | 56°F | 35°F | 3.54in | 0.6in |
| Dec | 45°F | 27°F | 2.8in | 2.5in |
If you're timing a visit, Apr, May, Jun, Sep, and Oct are Herculaneum's mildest stretch; if you're moving there, you should plan around Jul's heat and Jan's cold instead.
How wet Herculaneum actually gets
Over a typical year, Herculaneum sees about 43.57in of precipitation a year across roughly 101 days with measurable rain or snow, with 9.2in of snow a year.
Herculaneum against the rest of the country
Out of 4876 cities scored here, Herculaneum comes in at 2516; within MO alone it ranks 57 of 135. Population is about 5,321.
Checking the actual forecast
These figures come from Festus, MO US, the NOAA station 1.8 miles from Herculaneum, averaged over 30 years, not tomorrow's forecast.
More on how this is worked out
Why this uses the nearest NOAA station · How the comfort score is calculated