May weather forecastSarnia, Canada
May
Weather in May
May, the last month of the spring in Sarnia, is a comfortable month, with an average temperature ranging between max 18°C (64.4°F) and min 8.8°C (47.8°F).Temperature
With the onset of May, Sarnia sees a temperature rise, with the average high-temperature moving from April's cool 10.7°C (51.3°F) to an enjoyable 18°C (64.4°F). The nighttime temperature dips to a frosty 8.8°C (47.8°F) on average during May.Humidity
April and May, with an average relative humidity of 76%, are the least humid months in Sarnia.Rainfall
May is the month with the most rainfall. Rain falls for 15.7 days and accumulates 54mm (2.13") of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.3 snowfall days, in May, Sarnia aggregates 2mm (0.08") of snow. In Sarnia, during the entire year, snow falls for 55.2 days and aggregates up to 312mm (12.28") of snow.Sea temperature
In May, the average sea temperature in Sarnia is 7°C (44.6°F).Note: Staying in 7°C (44.6°F) waters for just a few moments at 13°C (55.4°F) can be harrowing, and below 10°C (50°F) poses breathing and cold shock risks, depending on individual tolerance.
Daylight
In Sarnia, Canada, the average length of the day in May is 14h and 40min.On the first day of May in Sarnia, sunrise is at 6:22 am and sunset at 8:31 pm. On the last day of the month, sunrise is at 5:53 am and sunset at 9:01 pm EDT.
Sunshine
The average sunshine in May in Sarnia, Canada, is 8.7h.UV index
In Sarnia, Canada, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily high UV index of 5 in May translates into this advice:
Guard yourself - Precautionary measures against sun damage are advocated. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Always opt for UVA and UVB-resistant sunglasses on radiant days. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Sarnia, Canada
- Average high temperature in May: 18°C
The warmest month (with the highest average high temperature) is July (25.8°C).
The month with the lowest average high temperature is January (-2.3°C).
- Average low temperature in May: 8.8°C
The month with the highest average low temperature is July (16.3°C).
The coldest month (with the lowest average low temperature) is January (-7.5°C).
Average pressure in May
Sarnia, Canada
- Average pressure in May: 1015.4mbar
The month with the highest atmospheric pressure is March (1018.8mbar).
The month with the lowest atmospheric pressure is June (1013.5mbar).
Average wind speed in May
Sarnia, Canada
- Average wind speed in May: 13.7km/h
The windiest month (with the highest average wind speed) is January (18.2km/h).
The calmest month (with the lowest average wind speed) is July (11km/h).
Average humidity in May
Sarnia, Canada
- Average humidity in May: 76%
The month with the highest relative humidity is February (86%).
The months with the lowest relative humidity are April and May (76%).
Average rainfall in May
Sarnia, Canada
- Average rainfall in May: 54mm
The wettest month (with the highest rainfall) is May (54mm).
The driest month (with the least rainfall) is February (28mm).
Average rainfall days in May
Sarnia, Canada
- Average rainfall days in May: 15.7 days
The month with the highest number of rainy days is May (15.7 days).
The month with the least rainy days is February (5.7 days).
Average snowfall in May
Sarnia, Canada
- Average snowfall in May: 2mm
The month with the highest snowfall is February (99mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in May
Sarnia, Canada
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (14.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in May
Sarnia, Canada
- Average sea temperature in May: 7°C
The best month for swimming (with the highest average sea temperature) is August (23.2°C).
The coldest months (with the lowest average sea temperature) are February and March (0.3°C).
Average daylight in May /
Average sunshine in May
Sarnia, Canada
- Average daylight in May: 14h and 42min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in May: 8h and 42min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).
Average sunshine days in May
Sarnia, Canada
- Average sunshine days in May: 12.9 days
The month with the most sunshine days is November (15.2 days).
The month with the least sunshine days is February (11.3 days).
Average UV index in May
Sarnia, Canada
- Average UV index in May: 5
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in May
Sarnia, Canada
- Average cloud cover in May: 41
The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in May
Sarnia, Canada
- Average visibility in May: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
