August weather forecastSarnia, Canada
August
Weather in August
The last month of the summer, August, is another warm month in Sarnia, Canada, with temperature in the range of an average high of 25.3°C (77.5°F) and an average low of 16.1°C (61°F).Temperature
The beginning of August reveals an average high-temperature of a still warm 25.3°C (77.5°F), showing minimal deviation from the previous month. Sarnia's temperature tends to fall to an average low of 16.1°C (61°F) during the nights of August.Humidity
In Sarnia, the average relative humidity in August is 79%.Rainfall
In Sarnia, during August, the rain falls for 13.8 days and regularly aggregates up to 48mm (1.89") of precipitation. Throughout the year, there are 140.4 rainfall days, and 493mm (19.41") of precipitation is accumulated.Snowfall
In Sarnia, snow does not fall in June through September.Sea temperature
The month with the warmest seawater is August, with an average sea temperature of 23.2°C (73.8°F).Note: Given an individual's cold sensitivity, considering factors like sunshine, wind, and air temperature, a brief swim in 23.2°C (73.8°F) water might be pleasurable. (FYI: The standard water temperature for Olympic swimming contests is 25°C (77°F) to 28°C (82.4°F).)
Daylight
In Sarnia, the average length of the day in August is 13h and 53min.On the first day of the month, sunrise is at 6:21 am and sunset at 8:50 pm. On the last day of August, sunrise is at 6:53 am and sunset at 8:05 pm EDT.
Sunshine
In August, the average sunshine in Sarnia is 10h.UV index
The months with the highest UV index are July and August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 6 during August translates into the following guidance:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Warning! Reflective surfaces like sand and water amplify the Sun's UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Sarnia, Canada
- Average high temperature in August: 25.3°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 August: 16.1°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 August
Sarnia, Canada
- Average pressure in August: 1014.9mbar
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 August
Sarnia, Canada
- Average wind speed in August: 11.5km/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 August
Sarnia, Canada
- Average humidity in August: 79%
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 August
Sarnia, Canada
- Average rainfall in August: 48mm
The wettest month (with the highest rainfall) is May (54mm).
The driest month (with the least rainfall) is February (28mm).
Average rainfall days in August
Sarnia, Canada
- Average rainfall days in August: 13.8 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 August
Sarnia, Canada
- Average snowfall in August: 0mm
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 August
Sarnia, Canada
- Average snowfall days in August: 0 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 August
Sarnia, Canada
- Average sea temperature in August: 23.2°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 August /
Average sunshine in August
Sarnia, Canada
- Average daylight in August: 13h and 54min
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 August: 10h and 0min
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 August
Sarnia, Canada
- Average sunshine days in August: 13.7 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 August
Sarnia, Canada
- Average UV index in August: 6
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 August
Sarnia, Canada
- Average cloud cover in August: 31
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 August
Sarnia, Canada
- Average visibility in August: 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).
