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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, the same as December, is a wintry winter month in Herculaneum, Missouri, with an average temperature ranging between min 25.2°F (-3.8°C) and max 39°F (3.9°C). Herculaneum notes the coldest temperatures in January, with a high average of 39°F (3.9°C) and a low of 25.2°F (-3.8°C). Weather in January »
Weather in February
February, the last month of the winter in Herculaneum, is a frosty month, with an average temperature varying between 43.5°F (6.4°C) and 28.4°F (-2°C). The transition into February reveals an average high-temperature of a chilly 43.5°F (6.4°C), mirroring a close resemblance to January. Weather in February »
Weather in March
The first month of the spring, March, is a cool month in Herculaneum, Missouri, with an average temperature ranging between min 38.1°F (3.4°C) and max 54.9°F (12.7°C). Herculaneum experiences a temperature shift with the start of March, with average high-temperatures moving from a chilly 43.5°F (6.4°C) in February to a cool 54.9°F (12.7°C). Weather in March »
Weather in April
April is a refreshing spring month in Herculaneum, Missouri, with temperature in the range of an average high of 65.8°F (18.8°C) and an average low of 47.7°F (8.7°C). Herculaneum in April experiences an increase in the average high-temperature, moving from March's fresh 54.9°F (12.7°C) to a comfortable 65.8°F (18.8°C). Weather in April »
Weather in May
May, the last month of the spring in Herculaneum, is a moderately hot month, with an average temperature ranging between max 75.6°F (24.2°C) and min 57°F (13.9°C). A rise in the average high-temperature is observed during May, moving from a comfortable 65.8°F (18.8°C) in April to a moderately hot 75.6°F (24.2°C). Weather in May »
Weather in June
June, the first month of the summer in Herculaneum, is still a warm month, with an average temperature ranging between min 65.3°F (18.5°C) and max 84.9°F (29.4°C). With the transition into June, Herculaneum experiences an increase in average high-temperatures, moving up from a moderately hot 75.6°F (24.2°C) in May to a still warm 84.9°F (29.4°C). Weather in June »
Weather in July
July in Herculaneum, Missouri, is a hot summer month, with an average temperature ranging between min 68.2°F (20.1°C) and max 88°F (31.1°C). July brings the highest temperatures, with an average high of 88°F (31.1°C) and an average low of 68.2°F (20.1°C). In July, the heat index is estimated at a blisteringly hot 104°F (40°C). Weather in July »
Weather in August
The last month of the summer, August, is another tropical month in Herculaneum, Missouri, with an average temperature ranging between max 86.2°F (30.1°C) and min 66.4°F (19.1°C). The shift into August reveals an average high-temperature of a still tropical 86.2°F (30.1°C), closely mirroring July's climate. Weather in August »
Weather in September
September, the first month of the autumn in Herculaneum, is still a warm month, with an average temperature fluctuating between 79.7°F (26.5°C) and 59.9°F (15.5°C). The beginning of September brings a slight decrease in the average high-temperature, transitioning from a hot 86.2°F (30.1°C) in August to a moderately hot 79.7°F (26.5°C). Weather in September »
Weather in October
October, the same as September, is another comfortable autumn month in Herculaneum, Missouri, with an average temperature fluctuating between 67.1°F (19.5°C) and 49.1°F (9.5°C). Start of October brings a shift in the average high-temperature, falling from September's warm 79.7°F (26.5°C) to a comfortable 67.1°F (19.5°C). Weather in October »
Weather in November
The last month of the autumn, November, is another cool month in Herculaneum, Missouri, with an average temperature ranging between max 54°F (12.2°C) and min 38.1°F (3.4°C). The shift from October to November corresponds with a decrease in the average high-temperature, down to a fresh 54°F (12.2°C) from a refreshing 67.1°F (19.5°C). Weather in November »
Weather in December
The first month of the winter, December, is also a frosty month in Herculaneum, Missouri, with temperature in the range of an average high of 43.5°F (6.4°C) and an average low of 30.7°F (-0.7°C). December involves a decrease in temperature, down from a fresh 54°F (12.2°C) in November to a frosty 43.5°F (6.4°C). Weather in December »
Updated: Jun 15, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the coldest?
January is the coldest month of the year, registering average temperatures as high as 39°F (3.9°C) and as low as 25.2°F (-3.8°C).
How many days does it rain in Herculaneum?
Throughout the year, there are 155 rainfall days, and 34.92" (887mm) of precipitation is accumulated.
When does it snow?
Months with snowfall are January through March, November and December.
When does it snow the most?
January is the month with the most snowfall. Snow falls for 6.8 days and accumulates 2.36" (60mm) of snow.
How much does it snow?
In Herculaneum, during the entire year, snow falls for 19.9 days and aggregates up to 8.43" (214mm) of snow.
What is the month with the least sunshine?
The month with the least sunshine is January, with an average of 4.8h of sunshine.
What are the months with the lowest UV index?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
What is the driest month?
February is the month with the least rainfall. Rain falls for 9.6 days and accumulates 1.97" (50mm) of precipitation.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
When it does not snow?
April through October are months without snowfall.
What is the most humid month in Herculaneum?
The most humid month is May, with an average relative humidity of 79%.
What is the wettest month?
May is the month with the most rainfall. Rain falls for 16.7 days and accumulates 4.25" (108mm) of precipitation.
When is the highest UV index?
May through August, with an average maximum UV index of 6, are months with the highest UV index.
When are the longest days?
The month with the longest days is June, with an average of 14h and 48min of daylight.
What is the month with the most sunshine?
June and July, with an average of 10.5h of sunshine, are months with the most sunshine.
What part of the year is the hottest?
The warmest period in Herculaneum is July, when temperatures fluctuate between an average high of 88°F (31.1°C) and a low of 68.2°F (20.1°C).
What is the least humid month?
October is the least humid month, with an average relative humidity of 72%.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 36min of daylight.
Average temperature
Herculaneum, MO
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (39°F).
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (25.2°F).
Average pressure
Herculaneum, MO
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.13"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Herculaneum, MO
- Average wind speed in January:
9mph - Average wind speed in February:
8.9mph - Average wind speed in March:
8.6mph - Average wind speed in April:
8.5mph - Average wind speed in May:
7mph - Average wind speed in June:
6.2mph
- Average wind speed in July:
5.3mph - Average wind speed in August:
5.2mph - Average wind speed in September:
5.6mph - Average wind speed in October:
7.3mph - Average wind speed in November:
8.1mph - Average wind speed in December:
8.3mph
The windiest month (with the highest average wind speed) is January (9mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity
Herculaneum, MO
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Herculaneum, MO
- Average rainfall in January:
2.32" - Average rainfall in February:
1.97" - Average rainfall in March:
2.8" - Average rainfall in April:
3.82" - Average rainfall in May:
4.25" - Average rainfall in June:
3.54"
- Average rainfall in July:
3.11" - Average rainfall in August:
3.43" - Average rainfall in September:
2.13" - Average rainfall in October:
2.91" - Average rainfall in November:
2.09" - Average rainfall in December:
2.56"
The wettest month (with the highest rainfall) is May (4.25").
The driest month (with the least rainfall) is February (1.97").
Average rainfall days
Herculaneum, MO
- Average rainfall days in January:
8.2 days - Average rainfall days in February:
9.6 days - Average rainfall days in March:
14.8 days - Average rainfall days in April:
15.3 days - Average rainfall days in May:
16.7 days - Average rainfall days in June:
15.3 days
- Average rainfall days in July:
17.8 days - Average rainfall days in August:
14.6 days - Average rainfall days in September:
13 days - Average rainfall days in October:
11 days - Average rainfall days in November:
10.1 days - Average rainfall days in December:
8.6 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is January (8.2 days).
Average snowfall
Herculaneum, MO
The month with the highest snowfall is January (2.36").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Herculaneum, MO
- Average snowfall days in January:
6.8 days - Average snowfall days in February:
5.8 days - Average snowfall days in March:
1.8 days - Average snowfall days in April:
0 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.1 days - Average snowfall days in November:
1.5 days - Average snowfall days in December:
3.9 days
The month with the highest number of snowfall days is January (6.8 days).
The months with the least snowfall days are April, May, June, July, August and September (0 days).
Average daylight / Average sunshine
Herculaneum, MO
- Average daylight in January:
9h and 5min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 2min - Average daylight in June:
14h and 5min
- Average daylight in July:
14h and 3min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 1min - Average daylight in December:
9h and 4min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in January:
4h and 5min - Average sunshine in February:
4h and 5min - Average sunshine in March:
6h and 3min - Average sunshine in April:
8h and 4min - Average sunshine in May:
9h and 2min - Average sunshine in June:
10h and 3min
- Average sunshine in July:
10h and 3min - Average sunshine in August:
10h and 2min - Average sunshine in September:
9h and 3min - Average sunshine in October:
6h and 1min - Average sunshine in November:
5h and 4min - Average sunshine in December:
5h and 0min
The months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days
Herculaneum, MO
- Average sunshine days in January:
17.9 days - Average sunshine days in February:
14.5 days - Average sunshine days in March:
13.1 days - Average sunshine days in April:
13.4 days - Average sunshine days in May:
12.3 days - Average sunshine days in June:
11.9 days
- Average sunshine days in July:
10.7 days - Average sunshine days in August:
13.8 days - Average sunshine days in September:
14.6 days - Average sunshine days in October:
18.4 days - Average sunshine days in November:
17.8 days - Average sunshine days in December:
19.2 days
The month with the most sunshine days is December (19.2 days).
The month with the least sunshine days is July (10.7 days).
Average UV index
Herculaneum, MO
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Herculaneum, MO
The month with the most cloud cover is January (Cloud cover 49).
The months with the least cloud cover are June, July and August (Cloud cover 28).
Average visibility
Herculaneum, MO
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Herculaneum, Missouri, USA
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