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
The start of May is characterized by an increase in the average high-temperature, transitioning from a comfortable 62.8°F (17.1°C) in April to a pleasant 72.1°F (22.3°C). Union Star's nighttime temperature in May drops to an average of 55.2°F (12.9°C).Humidity
In May, the average relative humidity is 78%.Rainfall
May is the month with the most rainfall. Rain falls for 17.1 days and accumulates 4.02" (102mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows in Union Star. During 0.2 snowfall days, in May, Union Star aggregates 0.16" (4mm) of snow. Throughout the year, in Union Star, there are 25.5 snowfall days, and 10.91" (277mm) of snow is accumulated.Daylight
In May, the average length of the day is 14h and 25min.On the first day of May, sunrise is at 6:17 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 5:51 am and sunset at 8:40 pm CDT.
Sunshine
The average sunshine in May in Union Star is 8.6h.UV index
In May, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: The UV index of 5 in May translates into these instructions:
Act with care - The suggestion to avoid sunburn is emphasized. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May?
What is the average humidity in May?
What is the wettest month?
How much does it rain in Union Star in May?
What is the last month it snows?
What is the average length of the day in May?
What time are sunrise and sunset in May in Union Star?
How long on average sun shines in May?
What is the UV index reading in May?
Average temperature in May
Union Star, MO
- Average high temperature in May: 72.1°F
The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is January (34.2°F).
- Average low temperature in May: 55.2°F
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (20.3°F).
Average pressure in May
Union Star, MO
- Average pressure in May: 29.92"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in May
Union Star, MO
- Average wind speed in May: 8.2mph
The windiest months (with the highest average wind speed) are February and March (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.4mph).
Average humidity in May
Union Star, MO
- Average humidity in May: 78%
The month with the highest relative humidity is June (79%).
The months with the lowest relative humidity are October and November (70%).
Average rainfall in May
Union Star, MO
- Average rainfall in May: 4.02"
The wettest month (with the highest rainfall) is May (4.02").
The driest months (with the least rainfall) are January and February (0.94").
Average rainfall days in May
Union Star, MO
- Average rainfall days in May: 17.1 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is January (3.8 days).
Average snowfall in May
Union Star, MO
- Average snowfall in May: 0.16"
The month with the highest snowfall is January (3.43").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Union Star, MO
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is February (7.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Union Star, MO
- Average daylight in May: 14h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in May: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in May
Union Star, MO
- Average sunshine days in May: 11.4 days
The month with the most sunshine days is November (21.1 days).
The month with the least sunshine days is June (10.8 days).
Average UV index in May
Union Star, MO
- Average UV index in May: 5
The months with the highest UV index are 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
Union Star, MO
- Average cloud cover in May: 40
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in May
Union Star, 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).
Union Star, Missouri, USA
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