May weather forecastSaint Clair, MO
May
Weather in May
May, the last month of the spring in Saint Clair, is a warm month, with temperature in the range of an average high of 76.3°F (24.6°C) and an average low of 56.3°F (13.5°C).Temperature
The beginning of May signals a rise in the average high-temperature, moving from an enjoyable 66.6°F (19.2°C) in April to a warm 76.3°F (24.6°C). The average low-temperature of 56.3°F (13.5°C) is witnessed in Saint Clair, Missouri, during May.Humidity
The most humid month is May, with an average relative humidity of 78%.Rainfall
The months with the most rainfall in Saint Clair are April and May, with an average 2.48" (63mm) of precipitation.Snowfall
In Saint Clair, snow does not fall in April through October.Daylight
In Saint Clair, the average length of the day in May is 14h and 16min.On the first day of the month, sunrise is at 6:06 am and sunset at 7:55 pm. On the last day of May, sunrise is at 5:42 am and sunset at 8:21 pm CDT.
Sunshine
In May, the average sunshine is 9.2h.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The daily maximum UV index of 6 in May interprets into the following advice:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Saint Clair, MO
- Average high temperature in May: 76.3°F
The warmest month (with the highest average high temperature) is July (88.9°F).
The month with the lowest average high temperature is January (39°F).
- Average low temperature in May: 56.3°F
The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in May
Saint Clair, 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
Saint Clair, MO
- Average wind speed in May: 6.7mph
The windiest month (with the highest average wind speed) is January (8.5mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).
Average humidity in May
Saint Clair, 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 (72%).
Average rainfall in May
Saint Clair, MO
- Average rainfall in May: 2.48"
The wettest months (with the highest rainfall) are April and May (2.48").
The driest months (with the least rainfall) are January and February (0.98").
Average rainfall days in May
Saint Clair, MO
- Average rainfall days in May: 15.4 days
The month with the highest number of rainy days is May (15.4 days).
The month with the least rainy days is January (5.9 days).
Average snowfall in May
Saint Clair, MO
- Average snowfall in May: 0"
The month with the highest snowfall is February (1.57").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Saint Clair, MO
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (6.2 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Saint Clair, MO
- Average daylight in May: 14h and 18min
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 12min
The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 42min).
Average sunshine days in May
Saint Clair, MO
- Average sunshine days in May: 13.7 days
The month with the most sunshine days is January (20.6 days).
The month with the least sunshine days is May (13.7 days).
Average UV index in May
Saint Clair, 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
Saint Clair, MO
- Average cloud cover in May: 39
The months with the most cloud cover are January and February (Cloud cover 49).
The months with the least cloud cover are June and July (Cloud cover 29).
Average visibility in May
Saint Clair, MO
- Average visibility in May: 5mi
The months with the highest visibility are January, February, March, April, June, July, October, November and December (6mi).
The months with the lowest visibility are May, August and September (5mi).
