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 arrival of May signals an increase in the average high-temperature, moving from a frosty 46.9°F (8.3°C) in April to a moderate 56.1°F (13.4°C). May brings an average low-temperature of 45.1°F (7.3°C) to Union.Humidity
In May, the average relative humidity in Union, Maine, is 82%.Rainfall
In Union, during May, the rain falls for 12.7 days and regularly aggregates up to 1.06" (27mm) of precipitation. In Union, during the entire year, the rain falls for 122.8 days and collects up to 13.43" (341mm) of precipitation.Snowfall
In Union, snow does not fall in May through October.Daylight
In May, the average length of the day in Union is 14h and 47min.On the first day of the month, sunrise is at 5:26 am and sunset at 7:41 pm. On the last day of May, sunrise is at 4:56 am and sunset at 8:13 pm EDT.
Sunshine
In Union, Maine, the average sunshine in May is 8.1h.UV index
In Union, the average daily maximum UV index in May is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.Note: The maximum UV index of 4 during May translates into these guidelines:
Undertake precautions - Guarding against sun damage is counselled. Minimize direct exposure to the Sun during midday when its radiation is at its peak. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Union in May?
What is the average humidity in May in Union?
How much does it rain in Union in May?
When it does not snow in Union?
Does it snow in Union in May?
What is the average length of the day in May in Union?
When are sunrise and sunset in May in Union?
How many hours of sunshine does Union have in May?
What is the UV index reading in May in Union?
Average temperature in May
Union, ME
- Average high temperature in May: 56.1°F
The warmest month (with the highest average high temperature) is August (70.7°F).
The month with the lowest average high temperature is January (29.8°F).
- Average low temperature in May: 45.1°F
The months with the highest average low temperature are July and August (59.4°F).
The coldest month (with the lowest average low temperature) is January (19.9°F).
Average pressure in May
Union, ME
- Average pressure in May: 29.99"Hg
The month with the highest atmospheric pressure is September (30.04"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in May
Union, ME
- Average wind speed in May: 8.9mph
The windiest month (with the highest average wind speed) is January (12.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.2mph).
Average humidity in May
Union, ME
- Average humidity in May: 82%
The months with the highest relative humidity are June and July (84%).
The month with the lowest relative humidity is November (76%).
Average rainfall in May
Union, ME
- Average rainfall in May: 1.06"
The wettest months (with the highest rainfall) are April, November and December (1.42").
The driest month (with the least rainfall) is September (0.75").
Average rainfall days in May
Union, ME
- Average rainfall days in May: 12.7 days
The month with the highest number of rainy days is April (13.2 days).
The months with the least rainy days are January and February (6.8 days).
Average snowfall in May
Union, ME
- Average snowfall in May: 0"
The month with the highest snowfall is January (1.69").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in May
Union, ME
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Union, ME
- Average daylight in May: 14h and 5min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in May: 8h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).
Average sunshine days in May
Union, ME
- Average sunshine days in May: 15.3 days
The month with the most sunshine days is September (19.9 days).
The month with the least sunshine days is April (13.8 days).
Average UV index in May
Union, ME
- Average UV index in May: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in May
Union, ME
- Average cloud cover in May: 47
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in May
Union, ME
- 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, Maine, USA
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