WEATHER FOR BUSINESS

We supply weather data to businesses

Free Weather Plugin

Add this forecast to your website



Local Weather

Port Lavaca 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Port Lavaca

Texas, United States Of America

Long range weather outlook for Port Lavaca includes 14 day forecast summary:

For Port Lavaca in the coming two weeks the average daytime maximum temperature will be around 32°C, with a high for the two weeks of 33°C expected on the afternoon of Sunday 26th. The average minimum temperature will be 25°C, dipping to its lowest on the morning of Saturday 18th at 22°C. Expect the next 14 days remain predominantly dry. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Sat 18
May
15:00

ESE
ESE

11 / 13 mph 91 / 97°F 55% 1009 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

14 / 18 mph 83 / 87°F 77% 1010 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

10 / 16 mph 76 / 80°F 91% 1012 mb
Low level cloud: 18%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 19
May
00:00

ESE
ESE

8 / 15 mph 74 / 79°F 95% 1012 mb
Low level cloud: 18%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ESE
ESE

8 / 14 mph 74 / 79°F 96% 1011 mb
Low level cloud: 41%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
41%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ESE
ESE

8 / 13 mph 75 / 80°F 97% 1012 mb
Low level cloud: 67%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
66%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

ESE
ESE

10 / 11 mph 86 / 91°F 73% 1014 mb
Low level cloud: 24%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SE
SE

11 / 13 mph 90 / 96°F 60% 1013 mb
Low level cloud: 3%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

ESE
ESE

11 / 13 mph 90 / 96°F 59% 1011 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
18:00

ESE
ESE

13 / 16 mph 85 / 90°F 72% 1011 mb
Low level cloud: 4%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

11 / 17 mph 77 / 82°F 90% 1011 mb
Low level cloud: 17%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 20
May
00:00

ESE
ESE

9 / 15 mph 76 / 81°F 96% 1011 mb
Low level cloud: 55%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SE
SE

11 / 17 mph 76 / 82°F 96% 1010 mb
Low level cloud: 57%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
57%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SE
SE

11 / 17 mph 77 / 82°F 95% 1010 mb
Low level cloud: 59%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
58%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

12 / 14 mph 85 / 92°F 72% 1011 mb
Low level cloud: 75%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
75%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSE
SSE

13 / 14 mph 90 / 97°F 62% 1011 mb
Low level cloud: 31%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SE
SE

13 / 15 mph 90 / 97°F 60% 1009 mb
Low level cloud: 12%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

ESE
ESE

13 / 17 mph 86 / 91°F 73% 1009 mb
Low level cloud: 18%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
17%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

11 / 18 mph 79 / 85°F 88% 1009 mb
Low level cloud: 15%
Mid level cloud: 0%
High level cloud: 38%
Most Significant Cloud Type: low
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 21
May
00:00

SSE
SSE

13 / 20 mph 80 / 87°F 84% 1009 mb
Low level cloud: 55%
Mid level cloud: 0%
High level cloud: 11%
Most Significant Cloud Type: low
56%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSE
SSE

14 / 21 mph 79 / 85°F 91% 1008 mb
Low level cloud: 36%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: low
36%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSE
SSE

13 / 20 mph 78 / 84°F 92% 1009 mb
Low level cloud: 43%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
43%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

18 / 20 mph 86 / 92°F 73% 1010 mb
Low level cloud: 71%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
70%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSE
SSE

17 / 19 mph 90 / 98°F 64% 1009 mb
Low level cloud: 14%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSE
SSE

16 / 18 mph 89 / 97°F 65% 1008 mb
Low level cloud: 23%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SE
SE

15 / 19 mph 84 / 90°F 76% 1008 mb
Low level cloud: 15%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SE
SE

14 / 21 mph 79 / 86°F 93% 1009 mb
Low level cloud: 55%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
54%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 22
May
00:00

SSE
SSE

13 / 20 mph 78 / 84°F 91% 1009 mb
Low level cloud: 35%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
34%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSE
SSE

12 / 18 mph 78 / 84°F 94% 1009 mb
Low level cloud: 54%
Mid level cloud: 0%
High level cloud: 86%
Most Significant Cloud Type: low
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSE
SSE

13 / 20 mph 78 / 85°F 93% 1009 mb
Low level cloud: 61%
Mid level cloud: 0%
High level cloud: 51%
Most Significant Cloud Type: low
67%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

16 / 18 mph 87 / 94°F 73% 1010 mb
Low level cloud: 30%
Mid level cloud: 3%
High level cloud: 13%
Most Significant Cloud Type: low
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSE
SSE

17 / 19 mph 89 / 97°F 65% 1010 mb
Low level cloud: 10%
Mid level cloud: 4%
High level cloud: 41%
Most Significant Cloud Type: low
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSE
SSE

17 / 20 mph 88 / 95°F 67% 1009 mb
Low level cloud: 23%
Mid level cloud: 4%
High level cloud: 13%
Most Significant Cloud Type: low
25%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSE
SSE

15 / 20 mph 84 / 89°F 76% 1008 mb
Low level cloud: 31%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SE
SE

14 / 21 mph 78 / 85°F 92% 1009 mb
Low level cloud: 46%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 23
May
00:00

SE
SE

14 / 21 mph 78 / 85°F 93% 1010 mb
Low level cloud: 52%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ESE
ESE

9 / 14 mph 77 / 83°F 95% 1010 mb
Low level cloud: 80%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
80%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ESE
ESE

14 / 21 mph 79 / 84°F 85% 1010 mb
Low level cloud: 93%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
94%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SE
SE

19 / 24 mph 82 / 87°F 76% 1011 mb
Low level cloud: 86%
Mid level cloud: 2%
High level cloud: 3%
Most Significant Cloud Type: low
86%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SE
SE

20 / 23 mph 85 / 91°F 69% 1012 mb
Low level cloud: 78%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
78%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SE
SE

18 / 20 mph 87 / 94°F 64% 1010 mb
Low level cloud: 7%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SE
SE

16 / 21 mph 84 / 88°F 73% 1009 mb
Low level cloud: 30%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
31%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SE
SE

15 / 23 mph 79 / 85°F 87% 1010 mb
Low level cloud: 52%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 24
May
00:00

SE
SE

12 / 19 mph 79 / 85°F 85% 1009 mb
Low level cloud: 55%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
56%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSE
SSE

13 / 21 mph 78 / 84°F 92% 1008 mb
Low level cloud: 67%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
68%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSE
SSE

13 / 18 mph 80 / 86°F 79% 1009 mb
Low level cloud: 80%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
80%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

15 / 17 mph 87 / 92°F 69% 1010 mb
Low level cloud: 49%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSE
SSE

19 / 22 mph 89 / 97°F 64% 1009 mb
Low level cloud: 17%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSE
SSE

18 / 20 mph 88 / 96°F 64% 1007 mb
Low level cloud: 1%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
1%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSE
SSE

17 / 22 mph 84 / 90°F 76% 1006 mb
Low level cloud: 14%
Mid level cloud: 0%
High level cloud: 3%
Most Significant Cloud Type: low
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SE
SE

18 / 27 mph 79 / 86°F 92% 1007 mb
Low level cloud: 47%
Mid level cloud: 4%
High level cloud: 20%
Most Significant Cloud Type: low
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Sat 25
May
00:00

SE
SE

13 / 23 mph 81 / 87°F 78% 1010 mb
Low level cloud: 71%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
71%
0.0 In
06:00

SSE
SSE

15 / 28 mph 81 / 86°F 79% 1009 mb
Low level cloud: 80%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
80%
0.0 In
12:00

SE
SE

16 / 23 mph 88 / 94°F 58% 1012 mb
Low level cloud: 8%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
8%
0.0 In
18:00

SSE
SSE

17 / 28 mph 86 / 96°F 70% 1010 mb
Low level cloud: 75%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
74%
0.0 In
Sun 26
May
00:00

SSE
SSE

13 / 21 mph 78 / 83°F 86% 1012 mb
Low level cloud: 59%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
59%
0.0 In
06:00

SSE
SSE

14 / 21 mph 80 / 86°F 85% 1011 mb
Low level cloud: 88%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: low
88%
0.0 In
12:00

S
S

20 / 26 mph 87 / 95°F 62% 1009 mb
Low level cloud: 12%
Mid level cloud: 2%
High level cloud: 18%
Most Significant Cloud Type: low
14%
0.0 In
18:00

SE
SE

15 / 20 mph 89 / 106°F 76% 1008 mb
Low level cloud: 31%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
31%
0.0 In
Mon 27
May
00:00

S
S

18 / 25 mph 81 / 89°F 86% 1007 mb
Low level cloud: 96%
Mid level cloud: 3%
High level cloud: 81%
Most Significant Cloud Type: low
100%
0.0 In
06:00

SSE
SSE

13 / 19 mph 81 / 88°F 81% 1010 mb
Low level cloud: 87%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
87%
0.0 In
12:00

SSE
SSE

15 / 20 mph 89 / 98°F 63% 1010 mb
Low level cloud: 8%
Mid level cloud: 6%
High level cloud: 33%
Most Significant Cloud Type: low
14%
0.0 In
18:00

SSE
SSE

16 / 21 mph 84 / 92°F 74% 1009 mb
Low level cloud: 2%
Mid level cloud: 6%
High level cloud: 6%
Most Significant Cloud Type: medium
11%
0.0 In
Tue 28
May
00:00

NW
NW

11 / 18 mph 78 / 84°F 93% 1015 mb
Low level cloud: 13%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: medium
84%
0.1 In
06:00

SSE
SSE

11 / 15 mph 81 / 88°F 80% 1011 mb
Low level cloud: 73%
Mid level cloud: 12%
High level cloud: 16%
Most Significant Cloud Type: low
79%
0.0 In
12:00

NNE
NNE

16 / 29 mph 88 / 91°F 49% 1018 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
0.5 In
18:00

ESE
ESE

17 / 23 mph 84 / 91°F 68% 1010 mb
Low level cloud: 0%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
0.0 In
Wed 29
May
00:00

NNE
NNE

14 / 25 mph 69 / 69°F 60% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
06:00

ENE
ENE

8 / 12 mph 76 / 82°F 93% 1013 mb
Low level cloud: 47%
Mid level cloud: 29%
High level cloud: 98%
Most Significant Cloud Type: low
68%
0.0 In
12:00

ENE
ENE

10 / 17 mph 81 / 80°F 34% 1020 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 6%
Most Significant Cloud Type: high
6%
0.0 In
18:00

ESE
ESE

16 / 22 mph 84 / 90°F 71% 1012 mb
Low level cloud: 4%
Mid level cloud: 7%
High level cloud: 32%
Most Significant Cloud Type: low
10%
0.0 In
Thu 30
May
00:00

E
E

7 / 14 mph 70 / 70°F 70% 1018 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 44%
Most Significant Cloud Type: medium
12%
0.0 In
06:00

SSE
SSE

10 / 15 mph 80 / 88°F 89% 1014 mb
Low level cloud: 28%
Mid level cloud: 32%
High level cloud: 69%
Most Significant Cloud Type: low
47%
0.0 In
12:00

E
E

15 / 27 mph 82 / 83°F 52% 1020 mb
Low level cloud: 35%
Mid level cloud: 18%
High level cloud: 74%
Most Significant Cloud Type: low
50%
0.0 In
18:00

SE
SE

14 / 20 mph 84 / 91°F 71% 1013 mb
Low level cloud: 7%
Mid level cloud: 4%
High level cloud: 33%
Most Significant Cloud Type: low
12%
0.0 In
Fri 31
May
00:00

E
E

10 / 18 mph 72 / 76°F 58% 1021 mb
Low level cloud: 0%
Mid level cloud: 33%
High level cloud: 0%
Most Significant Cloud Type: medium
32%
0.0 In
06:00

SSE
SSE

13 / 20 mph 80 / 87°F 89% 1015 mb
Low level cloud: 27%
Mid level cloud: 5%
High level cloud: 20%
Most Significant Cloud Type: low
30%
0.0 In
12:00

ESE
ESE

15 / 26 mph 84 / 85°F 48% 1021 mb
Low level cloud: 0%
Mid level cloud: 25%
High level cloud: 3%
Most Significant Cloud Type: medium
24%
0.0 In
18:00

SE
SE

14 / 19 mph 84 / 91°F 69% 1013 mb
Low level cloud: 5%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
7%
0.0 In
Sat 01
Jun
00:00

ESE
ESE

9 / 16 mph 73 / 77°F 74% 1020 mb
Low level cloud: 19%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
20%
0.0 In
06:00

SSE
SSE

9 / 15 mph 79 / 86°F 94% 1014 mb
Low level cloud: 43%
Mid level cloud: 6%
High level cloud: 2%
Most Significant Cloud Type: low
44%
0.0 In
12:00

ESE
ESE

17 / 31 mph 85 / 86°F 49% 1020 mb
Low level cloud: 45%
Mid level cloud: 3%
High level cloud: 11%
Most Significant Cloud Type: low
47%
0.0 In
18:00

SE
SE

13 / 18 mph 85 / 92°F 64% 1012 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In
Sun 02
Jun
00:00

SE
SE

11 / 20 mph 75 / 78°F 69% 1018 mb
Low level cloud: 61%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
62%
0.0 In
06:00

SSE
SSE

7 / 11 mph 79 / 86°F 94% 1013 mb
Low level cloud: 39%
Mid level cloud: 5%
High level cloud: 9%
Most Significant Cloud Type: low
42%
0.0 In
12:00

SE
SE

17 / 30 mph 83 / 85°F 54% 1018 mb
Low level cloud: 27%
Mid level cloud: 3%
High level cloud: 14%
Most Significant Cloud Type: low
29%
0.0 In
18:00

SSE
SSE

15 / 21 mph 85 / 93°F 69% 1011 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
0.0 In

Other Locations Near to Port Lavaca

The day label given represents the local day relative to the local time for the location you are looking at.
(More Info)

Day

This time is corrected for local time zones and where possible for daylight saving times.
(More Info)

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.
(More Info)

Dir

This refers to the sustained average wind speed, normally averaged over a period of 10 minutes for up to 3 hrs.
(More Info)

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.
(More Info)

Temp/
Feels Like

The relative humidity is the percent of saturation humidity, generally calculated in relation to saturated vapour density.
(More Info)

Humidity

The value given is a total predicted for the previous 3 hrs and includes the time of the forecast being looked at.
(More Info)

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.
(More Info)

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.
(More Info)

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.
(More Info)

Pressure