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Sarnia Weather Forecast

Temperature, wind, rain and more for Sarnia

Ontario, Canada

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Day	Local Time	Dir	Speed/ Gust	Temp/ Feels Like	Humidity	Pressure	Cloud Amount	Precip Amount
Tue 09 Dec	11:00	S	19 / 32 mph	21 / 6°F	84%	1013 mb	Low level cloud: 59% Mid level cloud: 73% High level cloud: 97% Most Significant Cloud Type: low 95%	Expect 0.01 In of precipitation over the past 3 hours. 0.01 In
	14:00	SSW	23 / 26 mph	35 / 23°F	92%	1008 mb	Low level cloud: 86% Mid level cloud: 92% High level cloud: 98% Most Significant Cloud Type: low 100%	Expect 0.06 In of precipitation over the past 3 hours. 0.06 In
	17:00	SW	19 / 22 mph	39 / 30°F	87%	1005 mb	Low level cloud: 100% Mid level cloud: 44% High level cloud: 100% Most Significant Cloud Type: low 100%	Expect 0.00 In of precipitation over the past 3 hours. 0.00 In
	20:00	SW	16 / 18 mph	41 / 33°F	91%	1005 mb	Low level cloud: 96% Mid level cloud: 100% High level cloud: 100% Most Significant Cloud Type: low 100%	Expect 0.00 In of precipitation over the past 3 hours. 0.00 In
	23:00	SSW	15 / 17 mph	42 / 34°F	91%	1003 mb	Low level cloud: 80% Mid level cloud: 100% High level cloud: 100% Most Significant Cloud Type: low 100%	Expect 0.00 In of precipitation over the past 3 hours. 0.00 In
Wed 10 Dec	02:00	S	14 / 19 mph	33 / 23°F	99%	998 mb	Low level cloud: 95% Mid level cloud: 100% High level cloud: 100% Most Significant Cloud Type: low 100%	Expect 0.11 In of precipitation over the past 3 hours. 0.11 In
	05:00	S	16 / 21 mph	34 / 23°F	99%	993 mb	Low level cloud: 93% Mid level cloud: 96% High level cloud: 100% Most Significant Cloud Type: low 100%	Expect 0.22 In of precipitation over the past 3 hours. 0.22 In
	08:00	SSW	11 / 16 mph	34 / 25°F	99%	990 mb	Low level cloud: 98% Mid level cloud: 81% High level cloud: 36% Most Significant Cloud Type: low 100%	Expect 0.15 In of precipitation over the past 3 hours. 0.15 In
	11:00	WSW	9 / 12 mph	34 / 27°F	100%	990 mb	Low level cloud: 98% Mid level cloud: 49% High level cloud: 32% Most Significant Cloud Type: low 100%	Expect 0.19 In of precipitation over the past 3 hours. 0.19 In
	14:00	N	22 / 28 mph	35 / 24°F	99%	991 mb	Low level cloud: 95% Mid level cloud: 100% High level cloud: 100% Most Significant Cloud Type: low 100%	Expect 0.05 In of precipitation over the past 3 hours. 0.05 In
	17:00	NNW	25 / 31 mph	32 / 19°F	83%	997 mb	Low level cloud: 77% Mid level cloud: 29% High level cloud: 45% Most Significant Cloud Type: low 92%	Expect 0.02 In of precipitation over the past 3 hours. 0.02 In
	20:00	NW	23 / 34 mph	24 / 8°F	82%	1003 mb	Low level cloud: 39% Mid level cloud: 0% High level cloud: 33% Most Significant Cloud Type: low 43%	Expect 0.00 In of precipitation over the past 3 hours. 0.00 In
	23:00	WNW	18 / 28 mph	19 / 4°F	83%	1007 mb	Low level cloud: 41% Mid level cloud: 3% High level cloud: 5% Most Significant Cloud Type: low 43%	Expect 0.00 In of precipitation over the past 3 hours. 0.00 In

Other Locations Near to Sarnia

Cities and Towns: Lake Huron Port Huron, Michigan, United States Of America
Golf Courses: Port Huron Elk's Golf Club, Michigan, United States Of America

The 7 day weather forecast summary for Sarnia:

For Sarnia in the coming week the average daytime maximum temperature will be around -2°C, with a high for the week of 6°C expected on the evening of Tuesday 9th. The average minimum temperature will be -10°C, dipping to its lowest on the morning of Sunday 14th at -13°C. Expect the next week to have mostly dry days although Tuesday 09^th and Wednesday 10^th are likely to see a significant amount of snow. Predictions are Wednesday 14th will have the most precipitation with an accumulation of around 19.0mm. On the whole winds are likely to be moderate.

The day label given represents the local day relative to the local time for the location you are looking at.
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Day

This time is corrected for local time zones and where possible for daylight saving times.
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Local Time

The wind direction we use on this page is the direction the wind is coming from, given in a 16 point compass format.
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Dir

This refers to the sustained average wind speed, normally averaged over a period of 10 minutes for up to 3 hrs.
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Speed/
Gust

Temperature from our forecast perspective are fairly well defined, they are what we would expect to measure in a standard meteorological screen (in other words, shaded and well ventilated) at 2 metres above ground level.
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Temp/
Feels Like

The relative humidity is the percent of saturation humidity, generally calculated in relation to saturated vapour density.
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Humidity

The value given is a total predicted for the previous 3 hrs and includes the time of the forecast being looked at.
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Precip Amount

The total amount of cloud as a percentage is derived from looking at cloud cover throughout the atmosphere and estimating how these combine when looked at from the ground.
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Cloud Amount

Here we try to capture the feel of the weather as an image ï¿½ it will never be perfect but is useful for a quick overview.
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Weather

When we measure for forecast air pressure we are normally doing this relative to a certain height and most commonly relative to Mean Sea Level.
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Pressure