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Johnston Weather Forecast

Temperature, wind, rain and more for Johnston

South Carolina, United States Of America

DayLocal TimeDirSpeed/
Gust		Temp/
Feels Like		HumidityPressureCloud AmountPrecip AmountWeather
Sat 14
Mar		10:00

W
W

 4 / 5 mph 65 / 63°F 50% 1021 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

S
S

 4 / 4 mph 75 / 75°F 33% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSE
SSE

 6 / 8 mph 76 / 75°F 32% 1019 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SE
SE

 7 / 15 mph 64 / 64°F 53% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SE
SE

 9 / 17 mph 60 / 60°F 62% 1021 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 15
Mar		01:00

SE
SE

 7 / 14 mph 56 / 54°F 82% 1021 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

ESE
ESE

 6 / 13 mph 54 / 53°F 95% 1019 mb
Low level cloud: 10%
Mid level cloud: 41%
High level cloud: 0%
Most Significant Cloud Type: medium
69%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

ENE
ENE

 5 / 10 mph 57 / 54°F 93% 1019 mb
Low level cloud: 23%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

ESE
ESE

 10 / 13 mph 66 / 64°F 71% 1018 mb
Low level cloud: 60%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SE
SE

 9 / 13 mph 71 / 71°F 63% 1015 mb
Low level cloud: 89%
Mid level cloud: 13%
High level cloud: 9%
Most Significant Cloud Type: low
94%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

S
S

 8 / 11 mph 76 / 77°F 62% 1012 mb
Low level cloud: 32%
Mid level cloud: 57%
High level cloud: 33%
Most Significant Cloud Type: low
55%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

ESE
ESE

 7 / 13 mph 66 / 66°F 87% 1011 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 11%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSE
SSE

 9 / 17 mph 64 / 64°F 91% 1009 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 33%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
The 7 day weather forecast summary for Johnston:

Over the next 7 days the Johnston forecast suggests the average daytime maximum temperature will be around 19°C, with a high for the week of 25°C expected on the afternoon of Saturday 21st. The average minimum temperature will be 6°C, dipping to its lowest on the morning of Tuesday 17th at -2°C. The week ahead will have mostly dry days although Sunday 15th and Monday 16th are likely to see a little rain or snow. Predictions are Sunday 17th will have the most precipitation with an accumulation of around 3.0mm. 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