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St. Helena Island Weather Forecast

Temperature, wind, rain and more for St. Helena Island

St. Helena Island

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Thu 08
Dec
09:00

SE
SE

14 / 23 mph 66 / 65°F 85% 1017 mb
Low level cloud: 89%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
88%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SE
SE

12 / 14 mph 70 / 69°F 85% 1016 mb
Low level cloud: 88%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
87%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SE
SE

11 / 13 mph 73 / 76°F 85% 1015 mb
Low level cloud: 85%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
85%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SE
SE

11 / 13 mph 71 / 69°F 84% 1015 mb
Low level cloud: 85%
Mid level cloud: 0%
High level cloud: 7%
Most Significant Cloud Type: low
85%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SE
SE

11 / 18 mph 66 / 66°F 84% 1016 mb
Low level cloud: 87%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: low
87%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 09
Dec
00:00

SE
SE

11 / 20 mph 65 / 65°F 85% 1017 mb
Low level cloud: 90%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
89%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SE
SE

13 / 26 mph 63 / 63°F 85% 1015 mb
Low level cloud: 90%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SE
SE

14 / 30 mph 63 / 62°F 85% 1016 mb
Low level cloud: 82%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
81%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SE
SE

14 / 24 mph 66 / 66°F 86% 1017 mb
Low level cloud: 89%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SE
SE

13 / 16 mph 71 / 70°F 88% 1016 mb
Low level cloud: 78%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
79%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ESE
ESE

13 / 15 mph 73 / 76°F 87% 1015 mb
Low level cloud: 76%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
77%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

11 / 14 mph 72 / 76°F 88% 1015 mb
Low level cloud: 45%
Mid level cloud: 6%
High level cloud: 3%
Most Significant Cloud Type: low
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

12 / 20 mph 67 / 67°F 90% 1017 mb
Low level cloud: 26%
Mid level cloud: 7%
High level cloud: 6%
Most Significant Cloud Type: low
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In

Other Locations Near to St. Helena Island

Cities and Towns: Jamestown, St. Helena Island
The 7 day weather forecast summary for St. Helena Island:

Over the next 7 days the St. Helena Island forecast suggests the average daytime maximum temperature will be around 23°C, with a high for the week of 25°C expected on the afternoon of Saturday 10th. The mean minimum temperature will be 18°C, dipping to its lowest on the morning of Thursday 8th at 16°C. The week will remain predominantly dry. 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