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's arrival in Ballwin coincides with a rise in the average high-temperature, moving from April's enjoyable 65.8°F (18.8°C) to a moderately hot 75.7°F (24.3°C). Ballwin experiences a consistent average temperature of 57.4°F (14.1°C) throughout the nights in May.Humidity
The most humid month in Ballwin, Missouri, is May, with an average relative humidity of 78%.Rainfall
The month with the most rainfall is May, when the rain falls for 16.3 days and typically aggregates up to 3.03" (77mm) of precipitation.Snowfall
In Ballwin, snow does not fall in April through October.Daylight
In May, the average length of the day in Ballwin is 14h and 17min.On the first day of the month, sunrise is at 6:03 am and sunset at 7:54 pm. On the last day of May, sunrise is at 5:39 am and sunset at 8:20 pm CDT.
Sunshine
The average sunshine in May in Ballwin is 9.4h.UV index
The average daily maximum UV index in May in Ballwin is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for average individuals.Note: A daily high UV index of 6 in May leads to these guidelines:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature in Ballwin?
What is the most humid month in Ballwin?
What is the average humidity in May in Ballwin?
What is the rainiest month in Ballwin?
How many days does it rain in May in Ballwin?
When it does not snow in Ballwin?
What is the average length of the day in May in Ballwin?
When are sunrise and sunset in May in Ballwin?
How many hours of sunshine does Ballwin have in May?
What is the UV index intensity in May in Ballwin?
Average temperature in May
Ballwin, MO
- Average high temperature in May: 75.7°F
The warmest month (with the highest average high temperature) is July (88.2°F).
The month with the lowest average high temperature is January (38.5°F).
- Average low temperature in May: 57.4°F
The month with the highest average low temperature is July (69.3°F).
The coldest month (with the lowest average low temperature) is January (24.6°F).
Average pressure in May
Ballwin, MO
- Average pressure in May: 29.95"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
Ballwin, MO
- Average wind speed in May: 6.9mph
The windiest month (with the highest average wind speed) is January (8.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).
Average humidity in May
Ballwin, MO
- Average humidity in May: 78%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (71%).
Average rainfall in May
Ballwin, MO
- Average rainfall in May: 3.03"
The wettest month (with the highest rainfall) is May (3.03").
The driest month (with the least rainfall) is February (1.1").
Average rainfall days in May
Ballwin, MO
- Average rainfall days in May: 16.3 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is December (6.1 days).
Average snowfall in May
Ballwin, MO
- Average snowfall in May: 0"
The month with the highest snowfall is December (1.3").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Ballwin, MO
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (6.4 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Ballwin, 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 30min).
- Average sunshine in May: 9h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in May
Ballwin, MO
- Average sunshine days in May: 12.6 days
The month with the most sunshine days is December (20.3 days).
The month with the least sunshine days is May (12.6 days).
Average UV index in May
Ballwin, MO
- Average UV index in May: 6
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in May
Ballwin, MO
- Average cloud cover in May: 38
The month with the most cloud cover is January (Cloud cover 51).
The months with the least cloud cover are June, July and August (Cloud cover 29).
Average visibility in May
Ballwin, 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).
Ballwin, Missouri, USA
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