Clear Outside v1.0 - International Weather Forecasts For Astronomers

Monday 27

Waxing Gibbous 97%

20:36

02:38

01 Good
02 Good
03 OK
04 OK
05 OK
06 OK
07 OK
08 OK
09 Bad
10 Bad
11 OK
12 OK
13 OK
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad

Sun - Rise: 05:33, Set: 21:12, Transit: 13:23. Moon - Rise: 20:36, Set: 02:38. Civil Dark: 21:54 - 04:51. Nautical Dark: 22:51 - 03:54. Astro Dark: 00:19 - 02:26

Total Clouds (% Sky Obscured)

4
0
24
22
28
25
35
36
51
44
32
34
34
47
48
60
65
85
91
98
95
91
64
59

Low Clouds (% Sky Obscured)

4
0
24
22
28
25
35
36
51
44
32
32
23
38
32
50
55
80
84
86
85
78
59
59

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
13
8
20
10
7
5
10
9
20
18
31
27

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
3
9
5
2
4
2
2
2
2
6
7
7
45
12
41
11
4

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
8
8
8
8
8
8
8
8
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
4
15
5
14
1
0
2

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

12
10
9
8
7
6
5
8
9
11
12
13
14
14
15
15
15
14
13
11
8
8
8
8

Chance of Frost

Temperature (°C)

14
13
13
13
13
13
13
15
17
18
19
20
20
20
20
20
20
20
19
19
18
18
18
18

Feels Like (°C)

14
12
12
13
13
13
14
15
16
16
17
17
18
18
18
18
18
18
18
18
18
18
18
18

Dew Point (°C)

11
11
11
11
12
11
11
11
11
11
13
13
14
15
16
16
16
17
17
17
17
17
17
17

Relative Humidity (%)

78
86
89
90
92
92
87
78
68
62
64
66
68
70
76
77
78
82
85
90
95
93
96
96

Pressure (mb)

1016
1016
1017
1017
1017
1018
1018
1019
1020
1020
1020
1020
1020
1020
1021
1021
1020
1020
1020
1020
1020
1021
1021
1021

Ozone (du)

325
324
324
324
326
327
327
327
327
328
328
328
328
328
327
327
326
326
325
325
325
324
324
323

Tuesday 28

Waxing Gibbous 100%

21:03

03:45

01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad

Sun - Rise: 05:35, Set: 21:11, Transit: 13:23. Moon - Rise: 21:03, Set: 03:45. Civil Dark: 21:52 - 04:53. Nautical Dark: 22:49 - 03:56. Astro Dark: 00:14 - 02:32

Total Clouds (% Sky Obscured)

79
86
93
98
96
95
96
97
100
100
100
88
85
100
91
93
72
81
87
64
84
93
62
59

Low Clouds (% Sky Obscured)

68
71
70
76
75
73
67
74
68
67
67
36
28
25
26
17
20
11
15
15
23
35
37
38

Medium Clouds (% Sky Obscured)

52
61
84
84
85
84
87
92
83
86
86
86
85
75
87
85
25
40
23
16
29
87
16
8

High Clouds (% Sky Obscured)

15
27
11
44
46
50
8
3
41
48
53
25
47
89
52
70
52
46
55
43
62
25
23
27

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
8
8
8
8
8
8
8
8
8
8
8
8
8
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

0
1
0
0
0
0
0
0
0
2
0
0
0
0
0
0
2
2
0
0
0
0
0
0

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

7
6
6
6
6
6
6
8
9
9
10
10
10
9
9
9
8
8
7
5
3
2
2
2

Chance of Frost

Temperature (°C)

17
17
17
17
17
17
17
18
19
20
20
21
21
21
22
22
21
21
20
19
17
17
16
16

Feels Like (°C)

18
18
18
18
17
18
18
19
19
19
19
20
20
20
21
21
20
20
20
19
18
18
17
17

Dew Point (°C)

17
17
17
17
16
16
16
17
16
16
16
16
16
15
15
15
15
15
15
15
16
15
15
15

Relative Humidity (%)

98
96
96
96
95
95
93
89
82
78
75
73
71
68
66
67
67
67
71
78
90
92
92
90

Pressure (mb)

1020
1020
1020
1019
1019
1019
1019
1020
1019
1019
1019
1019
1019
1019
1018
1018
1017
1017
1017
1016
1016
1016
1016
1016

Ozone (du)

323
323
323
321
321
321
320
319
319
320
321
321
320
320
321
323
322
322
324
324
325
326
327
328

Wednesday 29

Full Moon 100%

21:24

04:59

01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad

Sun - Rise: 05:36, Set: 21:09, Transit: 13:23. Moon - Rise: 21:24, Set: 04:59. Civil Dark: 21:51 - 04:55. Nautical Dark: 22:47 - 03:59. Astro Dark: 00:09 - 02:36

Total Clouds (% Sky Obscured)

67
52
57
68
69
83
69
62
60
60
65
53
61
57
66
54
74
73
76
75
70
97
98
100

Low Clouds (% Sky Obscured)

44
52
53
60
65
66
54
56
54
57
57
50
41
35
38
32
38
48
43
41
35
43
52
58

Medium Clouds (% Sky Obscured)

3
0
3
1
4
12
7
0
0
0
0
0
0
0
0
16
17
23
24
24
24
13
11
75

High Clouds (% Sky Obscured)

41
1
0
0
0
0
0
0
0
0
0
0
25
30
30
13
74
73
59
38
17
75
89
100

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
8
8
8
8
8
9
8
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
8
8
1
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

0
0
0
0
1
9
10
7
5
5
2
2
0
0
0
1
0
0
2
3
2
7
7
4

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

2
2
2
2
2
2
2
4
6
8
10
11
11
11
11
13
13
13
13
12
10
7
7
7

Chance of Frost

Temperature (°C)

16
16
15
16
15
16
17
18
20
20
21
21
22
22
22
22
22
21
20
19
18
17
17
17

Feels Like (°C)

18
18
18
18
18
18
19
21
23
23
22
21
22
21
20
20
20
19
19
19
18
17
17
17

Dew Point (°C)

14
14
13
14
13
14
14
15
14
14
14
14
14
14
14
14
14
14
15
15
16
16
16
16

Relative Humidity (%)

89
87
87
87
87
87
83
78
71
65
62
61
62
61
62
62
63
65
69
77
86
92
96
96

Pressure (mb)

1016
1015
1015
1014
1014
1014
1014
1014
1014
1014
1014
1014
1014
1014
1014
1013
1013
1013
1013
1013
1013
1013
1013
1013

Ozone (du)

329
332
333
332
330
329
328
328
327
327
328
331
331
331
332
334
332
331
331
331
332
332
332
334

Thursday 30

Waning Gibbous 100%

21:39

06:15

01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 OK
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Good
00 Good

Sun - Rise: 05:37, Set: 21:08, Transit: 13:23. Moon - Rise: 21:39, Set: 06:15. Civil Dark: 21:49 - 04:57. Nautical Dark: 22:44 - 04:01. Astro Dark: 00:04 - 02:41

Total Clouds (% Sky Obscured)

99
98
98
95
92
89
81
68
77
66
44
34
49
62
87
81
77
71
63
56
52
49
9
0

Low Clouds (% Sky Obscured)

58
54
52
54
52
53
46
38
40
32
33
26
40
47
56
52
45
39
37
34
26
17
8
0

Medium Clouds (% Sky Obscured)

79
89
88
94
91
50
24
18
17
10
4
0
1
1
2
1
1
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

97
93
89
70
52
29
19
1
35
30
0
0
0
5
40
35
40
30
25
25
35
40
0
0

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
8
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
Very Light Rain
Very Light Rain
Very Light Rain
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

5
5
5
26
28
46
50
54
38
29
14
5
5
4
2
2
2
2
2
3
14
6
2
3

Precipitation Amount (mm)

0
0
0
0
0
0.2
0.2
0.2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

7
8
8
8
9
10
11
12
14
13
14
15
15
16
16
17
16
15
14
12
10
7
6
4

Chance of Frost

Temperature (°C)

17
17
17
17
17
17
17
18
18
18
19
20
20
20
20
19
19
18
18
17
16
15
14
14

Feels Like (°C)

17
16
16
17
17
16
16
17
16
16
18
17
17
16
16
15
14
14
14
14
14
14
14
15

Dew Point (°C)

16
16
16
17
17
17
17
17
17
17
16
13
12
11
9
10
11
11
11
12
12
12
12
12

Relative Humidity (%)

95
95
95
96
96
96
96
93
93
89
80
63
58
56
51
55
58
62
64
70
78
86
87
87

Pressure (mb)

1013
1013
1013
1012
1012
1012
1012
1013
1013
1014
1014
1015
1015
1015
1015
1016
1016
1016
1016
1016
1016
1016
1017
1017

Ozone (du)

333
333
335
336
338
340
340
343
349
350
348
347
348
348
348
349
350
351
353
352
353
353
354
355

Friday 31

Waning Gibbous 98%

21:52

07:31

01 OK
02 OK
03 Bad
04 Bad
05 OK
06 OK
07 OK
08 OK
09 OK
10 OK
11 OK
12 Bad
13 OK
14 OK
15 Good
16 Good
17 Good
18 Good
19 Good
20 Good
21 OK
22 OK
23 OK
00 OK

Sun - Rise: 05:39, Set: 21:06, Transit: 13:23. Moon - Rise: 21:52, Set: 07:31. Civil Dark: 21:47 - 04:58. Nautical Dark: 22:42 - 04:03. Astro Dark: 00:00 - 02:46

Total Clouds (% Sky Obscured)

10
21
33
36
39
42
40
38
42
43
45
46
35
19
0
0
0
0
7
12
18
21
22
23

Low Clouds (% Sky Obscured)

9
19
27
27
29
32
32
30
31
28
26
24
16
7
0
0
0
0
6
12
18
21
22
23

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
3
6
8
4
2
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1

ISS Passover

Visibility (miles)

9
9
8
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

17
17
23
13
10
7
9
7
3
5
5
4
7
4
1
1
0
0
1
1
1
8
10
11

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

3
2
5
5
5
5
5
7
8
9
9
10
12
13
14
14
14
14
13
11
9
7
5
4

Chance of Frost

Temperature (°C)

14
13
12
12
12
12
13
14
16
17
18
18
19
19
19
19
19
18
18
16
15
14
13
13

Feels Like (°C)

16
15
13
12
11
12
13
14
15
16
16
16
16
16
16
16
16
15
16
14
14
13
13
13

Dew Point (°C)

12
11
11
10
10
10
10
9
8
7
6
6
6
7
7
8
8
9
9
10
11
11
11
10

Relative Humidity (%)

89
89
90
90
87
87
81
71
58
50
46
43
41
44
45
48
51
54
57
66
75
84
84
84

Pressure (mb)

1017
1017
1017
1017
1018
1018
1019
1019
1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
1021
1021
1021

Ozone (du)

354
353
354
356
358
358
358
357
357
357
358
359
360
361
361
362
360
357
354
354
353
352
350
349

Saturday 1

Waning Gibbous 94%

22:04

08:47

01 OK
02 OK
03 OK
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 OK
13 Bad
14 Bad
15 Bad
16 Bad
17 OK
18 OK
19 OK
20 Good
21 Good
22 Good
23 OK
00 OK

Sun - Rise: 05:41, Set: 21:05, Transit: 13:23. Moon - Rise: 22:04, Set: 08:47. Civil Dark: 21:45 - 05:00. Nautical Dark: 22:39 - 04:06. Astro Dark: 23:55 - 02:50

Total Clouds (% Sky Obscured)

24
26
31
47
61
76
73
65
65
56
52
42
53
67
82
62
43
27
20
17
15
15
25
35

Low Clouds (% Sky Obscured)

19
12
4
11
16
22
25
31
32
30
29
29
40
47
65
59
43
23
15
8
0
0
0
0

Medium Clouds (% Sky Obscured)

3
4
3
1
0
0
0
0
0
1
2
3
3
3
3
3
3
3
12
17
15
15
25
35

High Clouds (% Sky Obscured)

4
6
7
11
12
15
15
14
14
19
15
10
10
5
5
5
5
5
5
10
15
15
25
35

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

11
11
9
9
6
1
2
1
0
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

3
3
3
3
3
3
3
5
7
8
9
9
10
10
9
9
8
7
8
7
5
4
5
5

Chance of Frost

Temperature (°C)

12
12
11
11
11
11
11
13
15
17
17
18
19
19
20
20
20
20
19
18
16
13
12
11

Feels Like (°C)

12
11
12
12
12
12
12
12
12
13
14
14
15
17
16
15
16
16
16
15
14
13
12
10

Dew Point (°C)

10
9
9
8
8
9
9
8
8
7
8
8
8
8
8
7
7
6
5
4
4
3
3
2

Relative Humidity (%)

84
84
84
85
84
84
84
72
62
54
52
50
48
47
46
44
42
40
39
41
45
48
51
53

Pressure (mb)

1020
1020
1021
1021
1021
1021
1021
1022
1022
1022
1022
1022
1022
1022
1022
1022
1022
1021
1021
1021
1022
1022
1022
1022

Ozone (du)

347
344
340
337
335
332
330
327
324
322
321
320
319
319
320
320
321
323
325
327
330
332
335
337

Sunday 2

Waning Gibbous 88%

22:15

10:03

Sun - Rise: 05:42, Set: 21:03, Transit: 13:22. Moon - Rise: 22:15, Set: 10:03. Civil Dark: 21:43 - 05:02. Nautical Dark: 22:37 - 04:08. Astro Dark: 23:51 - 02:54

Total Clouds (% Sky Obscured)

Low Clouds (% Sky Obscured)

Medium Clouds (% Sky Obscured)

High Clouds (% Sky Obscured)

ISS Passover

Visibility (miles)

Fog (%)

Precipitation Type

Precipitation Probability (%)

Precipitation Amount (mm)

Wind Speed/Direction (mph)

Chance of Frost

Temperature (°C)

Feels Like (°C)

Dew Point (°C)

Relative Humidity (%)

Pressure (mb)

Ozone (du)

Forecast for Llanrhidian, City and County of Swansea, United Kingdom (51.61,-4.17)

Generated: 27/07/26 01:41:53. Forecast: 27/07/26 to 02/08/26. Timezone: UTC+1.00