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
May
Weather in May
Temperature
With the onset of May, Napierville's weather experiences a distinct temperature rise, moving from a fresh 10°C (50°F) in April to a comfortable 18.3°C (64.9°F). Napierville witnesses a consistent average low-temperature of 8.3°C (46.9°F) throughout May.Humidity
The average relative humidity in May is 76%.Rainfall
In Napierville, in May, it is raining for 14.3 days, with typically 31mm (1.22") of accumulated precipitation. In Napierville, during the entire year, the rain falls for 137 days and collects up to 329mm (12.95") of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.7 snowfall days, in May, Napierville aggregates 3mm (0.12") of snow. Throughout the year, in Napierville, Canada, there are 72.1 snowfall days, and 390mm (15.35") of snow is accumulated.Daylight
In Napierville, the average length of the day in May is 14h and 53min.On the first day of the month, sunrise is at 5:41 am and sunset at 8:00 pm. On the last day of May, in Napierville, sunrise is at 5:09 am and sunset at 8:33 pm EDT.
Sunshine
In Napierville, the average sunshine in May is 8.5h.UV index
In Napierville, Canada, the average daily maximum UV index in May is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: An average UV index of 4 in May transforms into this advice:
Act with care - The need to guard against sun damage is communicated. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Napierville in May?
What is the average humidity in May in Napierville?
How much does it rain in Napierville in May?
What is the last month it snows in Napierville?
How many hours of daylight does Napierville have in May?
When are sunrise and sunset in May in Napierville?
How many hours of sunshine does Napierville have in May?
What is the UV index intensity in May in Napierville?
Average temperature in May
Napierville, Canada
- Average high temperature in May: 18.3°C
The warmest month (with the highest average high temperature) is July (25.4°C).
The month with the lowest average high temperature is January (-5.3°C).
- Average low temperature in May: 8.3°C
The month with the highest average low temperature is July (15.3°C).
The coldest month (with the lowest average low temperature) is January (-12.4°C).
Average pressure in May
Napierville, Canada
- Average pressure in May: 1014.9mbar
The month with the highest atmospheric pressure is November (1017.9mbar).
The month with the lowest atmospheric pressure is June (1012.5mbar).
Average wind speed in May
Napierville, Canada
- Average wind speed in May: 12.3km/h
The windiest month (with the highest average wind speed) is April (13.9km/h).
The calmest months (with the lowest average wind speed) are July and August (10.4km/h).
Average humidity in May
Napierville, Canada
- Average humidity in May: 76%
The months with the highest relative humidity are January and February (90%).
The month with the lowest relative humidity is April (75%).
Average rainfall in May
Napierville, Canada
- Average rainfall in May: 31mm
The wettest month (with the highest rainfall) is August (37mm).
The driest month (with the least rainfall) is September (18mm).
Average rainfall days in May
Napierville, Canada
- Average rainfall days in May: 14.3 days
The month with the highest number of rainy days is June (16.6 days).
The month with the least rainy days is February (6.3 days).
Average snowfall in May
Napierville, Canada
- Average snowfall in May: 3mm
The month with the highest snowfall is January (93mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in May
Napierville, Canada
- Average snowfall days in May: 0.7 days
The month with the highest number of snowfall days is February (17.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Napierville, 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: 8h and 3min
The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 2h and 54min).
Average sunshine days in May
Napierville, Canada
- Average sunshine days in May: 13.3 days
The month with the most sunshine days is November (17.3 days).
The month with the least sunshine days is February (10.3 days).
Average UV index in May
Napierville, Canada
- 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 and December (UV index 1).
Average cloud cover in May
Napierville, Canada
- Average cloud cover in May: 44
The month with the most cloud cover is February (Cloud cover 70).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in May
Napierville, Canada
- Average visibility in May: 9km
The months with the highest visibility are April, May, June, July, August, September, October and November (9km).
The month with the lowest visibility is January (7km).
