Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
May sees a rise in the average high-temperature, climbing from a refreshing 65.8°F (18.8°C) in April to a moderately hot 75.6°F (24.2°C). Herculaneum's temperature tends to fall to an average low of 57°F (13.9°C) during the nights of May.Humidity
With an average relative humidity of 79%, May is the most humid month.Rainfall
May is the month with the most rainfall in Herculaneum. Rain falls for 16.7 days and accumulates 4.25" (108mm) of precipitation.Snowfall
April through October are months without snowfall in Herculaneum.Daylight
In Herculaneum, the average length of the day in May is 14h and 16min.On the first day of May, sunrise is at 6:03 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 5:39 am and sunset at 8:18 pm CDT.
Sunshine
In May, the average sunshine is 9.4h.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: The UV index of 6 in May translates into these instructions:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Frequently asked questions
What are the temperatures in Herculaneum in May?
What is the most humid month in Herculaneum?
What is the average humidity in May in Herculaneum?
What is the wettest month in Herculaneum?
How much does it rain in Herculaneum in May?
When it does not snow in Herculaneum?
How many hours of daylight does Herculaneum have in May?
When is the sunrise / sunset in May in Herculaneum?
How many hours of sunshine does Herculaneum have in May?
When is the highest UV index in Herculaneum?
How high is the UV index in May in Herculaneum?
Average temperature in May
Herculaneum, MO
- Average high temperature in May: 75.6°F
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).
- Average low temperature in May: 57°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 in May
Herculaneum, MO
- Average pressure in May: 29.96"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 in May
Herculaneum, MO
- Average wind speed in May: 7mph
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 in May
Herculaneum, MO
- Average humidity in May: 79%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (72%).
Average rainfall in May
Herculaneum, MO
- Average rainfall in May: 4.25"
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 in May
Herculaneum, MO
- Average rainfall days in May: 16.7 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 in May
Herculaneum, MO
- Average snowfall in May: 0"
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 in May
Herculaneum, MO
- Average snowfall days in May: 0 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 in May /
Average sunshine in May
Herculaneum, MO
- Average daylight in May: 14h and 2min
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 May: 9h and 2min
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 in May
Herculaneum, MO
- Average sunshine days in May: 12.3 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 in May
Herculaneum, MO
- Average UV index in May: 6
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 in May
Herculaneum, MO
- Average cloud cover in May: 37
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 in May
Herculaneum, MO
- Average visibility in May: 6mi
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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