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Mclean Weather Forecast

Temperature, wind, rain and more for Mclean

Virginia, United States Of America

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Fri 01
Aug		16:00

NE
NE

 4 / 6 mph 75 / 77°F 69% 1021 mb
Low level cloud: 91%
Mid level cloud: 45%
High level cloud: 90%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NE
NE

 3 / 4 mph 74 / 77°F 76% 1022 mb
Low level cloud: 87%
Mid level cloud: 44%
High level cloud: 59%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NE
NE

 2 / 3 mph 72 / 76°F 77% 1023 mb
Low level cloud: 4%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
56%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 02
Aug		01:00

N
N

 3 / 5 mph 69 / 69°F 82% 1023 mb
Low level cloud: 19%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

N
N

 5 / 9 mph 65 / 65°F 73% 1023 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

N
N

 6 / 9 mph 67 / 64°F 67% 1024 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NNE
NNE

 5 / 6 mph 78 / 78°F 59% 1024 mb
Low level cloud: 7%
Mid level cloud: 3%
High level cloud: 35%
Most Significant Cloud Type: low
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NNE
NNE

 6 / 7 mph 84 / 81°F 41% 1022 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 5%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NE
NE

 4 / 5 mph 84 / 81°F 44% 1021 mb
Low level cloud: 0%
Mid level cloud: 28%
High level cloud: 4%
Most Significant Cloud Type: medium
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NNE
NNE

 4 / 6 mph 78 / 78°F 62% 1022 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 3%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NE
NE

 4 / 5 mph 73 / 77°F 68% 1022 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 9%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
The 7 day weather forecast summary for Mclean:

Taking a look at Mclean over the coming week and the average daytime maximum temperature will be around 30°C, with a high for the week of 32°C expected on the afternoon of Friday 8th. The mean minimum temperature will be 20°C, dipping to its lowest on the morning of Saturday 2nd at 16°C. Expect the coming week to have mostly dry days although Friday is likely to see a little rain. Current predictions suggest Friday 2nd will have the most precipitation with an accumulation of around 1.0mm. 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