Local Weather

Sarnia Weather Forecast

Temperature, wind, rain and more for Sarnia

Ontario, Canada

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Wed 01
Feb		02:00

W
W

 10 / 18 mph 9 / -5°F 90% 1028 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
05:00

WSW
WSW

 8 / 17 mph 5 / -8°F 91% 1028 mb
Low level cloud: 29%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
29%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
08:00

WSW
WSW

 10 / 20 mph 7 / -7°F 92% 1028 mb
Low level cloud: 25%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
25%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
11:00

WSW
WSW

 13 / 18 mph 14 / -1°F 88% 1029 mb
Low level cloud: 13%
Mid level cloud: 11%
High level cloud: 13%
Most Significant Cloud Type: low
18%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
14:00

WSW
WSW

 14 / 17 mph 22 / 9°F 78% 1027 mb
Low level cloud: 90%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
92%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
17:00

WSW
WSW

 13 / 17 mph 24 / 13°F 79% 1026 mb
Low level cloud: 80%
Mid level cloud: 6%
High level cloud: 6%
Most Significant Cloud Type: low
82%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
20:00

SW
SW

 11 / 19 mph 20 / 8°F 87% 1026 mb
Low level cloud: 2%
Mid level cloud: 100%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
23:00

SW
SW

 11 / 18 mph 19 / 6°F 86% 1025 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 17%
Most Significant Cloud Type: medium
19%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
Thu 02
Feb		02:00

SW
SW

 12 / 23 mph 16 / 3°F 83% 1024 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 17%
Most Significant Cloud Type: medium
15%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
05:00

SW
SW

 13 / 25 mph 16 / 2°F 82% 1022 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 54%
Most Significant Cloud Type: medium
16%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
08:00

SW
SW

 12 / 25 mph 15 / 2°F 82% 1020 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
8%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
11:00

SW
SW

 14 / 23 mph 21 / 8°F 78% 1018 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
14:00

WSW
WSW

 16 / 19 mph 33 / 23°F 76% 1015 mb
Low level cloud: 16%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: low
22%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
17:00

W
W

 18 / 21 mph 34 / 24°F 88% 1015 mb
Low level cloud: 79%
Mid level cloud: 95%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
20:00

NW
NW

 20 / 23 mph 26 / 12°F 79% 1018 mb
Low level cloud: 54%
Mid level cloud: 52%
High level cloud: 0%
Most Significant Cloud Type: low
71%
Expect 0.02 In of precipitation over the past 3 hours.
0.02 In
23:00

NNW
NNW

 21 / 36 mph 13 / -5°F 73% 1022 mb
Low level cloud: 4%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
3%
Expect 0.00 In of precipitation over the past 3 hours.
0.00 In
The 7 day weather forecast summary for Sarnia:

The forecast for Sarnia in the coming week is predicting the average daytime maximum temperature will be around 0°C, with a high for the week of 11°C expected on the afternoon of Tuesday 7th. The average minimum temperature will be -8°C, dipping to its lowest on the morning of Wednesday 1st at -15°C. Expect the coming week to have mostly dry days although Sunday 05th and Tuesday 07th are likely to see a significant amount of rain, sleet or snow. It looks like Sunday 1st will have the most precipitation with an accumulation of around 8.0mm. 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 � 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