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 sea temperature 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 in Saint John witnesses an increase in the average high-temperature, moving from a frosty 7.3°C (45.1°F) in April to a fresh 12.8°C (55°F). An average low-temperature of 5.8°C (42.4°F) is noted during the nights in May in Saint John, Canada.Humidity
The average relative humidity in May in Saint John, Canada, is 81%.Rainfall
In May, in Saint John, Canada, the rain falls for 14.2 days. Throughout May, 35mm (1.38") of precipitation is accumulated. Throughout the year, in Saint John, Canada, there are 122.4 rainfall days, and 390mm (15.35") of precipitation is accumulated.Snowfall
January through May, November and December are months with snowfall in Saint John. May is the last month it regularly snows. During 0.2 snowfall days, in May, Saint John aggregates 1mm (0.04") of snow. In Saint John, during the entire year, snow falls for 37.1 days and aggregates up to 188mm (7.4") of snow.Sea temperature
In Saint John, in May, the average water temperature is 6.4°C (43.5°F).Note: Beware when you're in 6.4°C (43.5°F) waters; 13°C (55.4°F) is chilling and anything below 10°C (50°F) could cause breathing hindrance and a sudden cold shock, given your physical condition.
Daylight
In Saint John, the average length of the day in May is 14h and 54min.On the first day of May in Saint John, sunrise is at 6:11 am and sunset at 8:30 pm. On the last day of the month, sunrise is at 5:39 am and sunset at 9:04 pm ADT.
Sunshine
The average sunshine in May is 7.5h.UV index
In May, the average daily maximum UV index in Saint John is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: A maximum UV index of 4 in May translates into the following recommendations:
Adopt protective measures - Suggestions to resist sunburn are offered. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
What are the temperatures in Saint John in May?
What is the average humidity in May in Saint John?
How many days does it rain in May in Saint John?
What is the last month it snows in Saint John?
What is the water temperature in May in Saint John?
How many hours of daylight does Saint John have in May?
When are sunrise and sunset in May in Saint John?
How many hours of sunshine does Saint John have in May?
What is the UV index reading in May in Saint John?
Average temperature in May
Saint John, Canada
- Average high temperature in May: 12.8°C
The warmest month (with the highest average high temperature) is August (21.5°C).
The month with the lowest average high temperature is January (-1.9°C).
- Average low temperature in May: 5.8°C
The month with the highest average low temperature is August (14.3°C).
The coldest month (with the lowest average low temperature) is January (-8.6°C).
Average pressure in May
Saint John, Canada
- Average pressure in May: 1015.6mbar
The month with the highest atmospheric pressure is September (1017mbar).
The month with the lowest atmospheric pressure is June (1012.8mbar).
Average wind speed in May
Saint John, Canada
- Average wind speed in May: 14.4km/h
The windiest month (with the highest average wind speed) is January (19.9km/h).
The calmest month (with the lowest average wind speed) is August (12.3km/h).
Average humidity in May
Saint John, Canada
- Average humidity in May: 81%
The months with the highest relative humidity are January and February (85%).
The months with the lowest relative humidity are October and November (80%).
Average rainfall in May
Saint John, Canada
- Average rainfall in May: 35mm
The wettest month (with the highest rainfall) is December (43mm).
The driest month (with the least rainfall) is August (22mm).
Average rainfall days in May
Saint John, Canada
- Average rainfall days in May: 14.2 days
The month with the highest number of rainy days is May (14.2 days).
The month with the least rainy days is February (5.4 days).
Average snowfall in May
Saint John, Canada
- Average snowfall in May: 1mm
The month with the highest snowfall is January (40mm).
The months with the least snowfall are June, July, August, September and October (0mm).
Average snowfall days in May
Saint John, Canada
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is March (9.6 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature in May
Saint John, Canada
- Average sea temperature in May: 6.4°C
The best month for swimming (with the highest average sea temperature) is August (13.3°C).
The coldest month (with the lowest average sea temperature) is March (2.9°C).
Average daylight in May /
Average sunshine in May
Saint John, Canada
- Average daylight in May: 14h and 5min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in May: 7h and 3min
The month with the most sunshine is August (Average sunshine: 9h and 30min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).
Average sunshine days in May
Saint John, Canada
- Average sunshine days in May: 13.8 days
The month with the most sunshine days is January (18.9 days).
The month with the least sunshine days is April (11.8 days).
Average UV index in May
Saint John, Canada
- Average UV index in May: 4
The months with the highest UV index are July and August (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in May
Saint John, Canada
- Average cloud cover in May: 51
The month with the most cloud cover is February (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in May
Saint John, Canada
- Average visibility in May: 9km
The month with the highest visibility is October (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, November and December (9km).
Saint John, Canada
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