Clear Outside v1.0 - International Weather Forecasts For Astronomers

Tuesday 28

Waxing Gibbous 93%

17:15

04:43

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

Sun - Rise: 05:47, Set: 20:31, Transit: 13:10. Moon - Rise: 17:15, Set: 04:43. Civil Dark: 21:09 - 05:09. Nautical Dark: 21:57 - 04:21. Astro Dark: 22:56 - 03:21

Total Clouds (% Sky Obscured)

99
100
93
96
100
97
87
75
93
44
3
2
1
1
1
0
0
0
0
0
0
0
0
0

Low Clouds (% Sky Obscured)

93
79
72
95
100
94
80
71
73
2
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

15
40
0
0
1
14
12
1
56
27
2
2
1
1
1
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
0

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 (%)

0
0
9
20
19
5
18
5
6
2
0
0
0
1
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)

15
15
16
17
16
16
17
19
17
18
19
17
16
17
18
19
18
18
18
18
19
19
19
19

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

5
5
6
6
7
6
6
7
9
9
9
9
8
6
5
3
3
2
2
1
2
2
1
2

Dew Point (°C)

7
8
8
8
8
8
8
7
8
8
8
8
7
6
4
3
3
2
2
2
2
3
3
4

Relative Humidity (%)

84
88
85
80
79
81
80
69
65
66
69
70
73
72
70
69
70
70
69
71
75
78
78
81

Pressure (mb)

1026
1026
1026
1026
1026
1026
1026
1025
1024
1024
1024
1024
1024
1025
1025
1025
1025
1025
1025
1024
1024
1024
1024
1024

Ozone (du)

419
418
418
416
416
415
414
413
415
415
412
411
411
410
409
407
405
404
403
403
404
406
409
409

Wednesday 29

Waxing Gibbous 97%

18:29

04:55

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

Sun - Rise: 05:45, Set: 20:33, Transit: 13:10. Moon - Rise: 18:29, Set: 04:55. Civil Dark: 21:10 - 05:07. Nautical Dark: 21:59 - 04:18. Astro Dark: 22:59 - 03:18

Total Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
87
100
43
0
77
100
100
100
100
100
91
100
56
53
53
100

Low 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
0

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
44
50
3
0
15
30
31
37
18
2
0
0
0
0
0
0

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
43
100
43
0
64
100
100
100
100
100
91
100
53
50
47
100

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 (%)

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 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)

21
21
24
24
24
24
24
24
24
24
23
23
22
22
21
22
22
21
21
19
19
19
18
18

Chance of Frost

Temperature (°C)

8
10
12
13
15
16
17
18
17
17
16
14
13
12
12
11
10
10
10
10
9
9
9
9

Feels Like (°C)

3
4
6
7
10
11
11
12
12
12
9
8
7
6
5
4
3
3
3
3
3
3
3
3

Dew Point (°C)

5
6
6
7
8
9
10
10
10
10
9
8
7
6
5
5
4
4
4
4
4
4
4
5

Relative Humidity (%)

79
77
70
64
62
62
62
62
61
62
65
67
65
64
63
64
64
66
68
69
70
70
69
72

Pressure (mb)

1024
1024
1023
1023
1022
1022
1021
1021
1021
1020
1021
1021
1021
1022
1022
1022
1022
1021
1021
1021
1021
1020
1020
1020

Ozone (du)

408
405
404
404
405
406
406
406
400
396
395
393
391
389
387
384
382
381
379
378
376
375
373
371

Thursday 30

Waxing Gibbous 99%

19:43

05:08

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
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad

Sun - Rise: 05:43, Set: 20:34, Transit: 13:10. Moon - Rise: 19:43, Set: 05:08. Civil Dark: 21:12 - 05:05. Nautical Dark: 22:01 - 04:16. Astro Dark: 23:02 - 03:14

Total Clouds (% Sky Obscured)

98
100
100
98
100
88
86
75
75
75
77
70
60
55
63
93
79
66
73
78
70
73
87
99

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
15
27
36
48
60
77
70
73
87
90

Medium Clouds (% Sky Obscured)

2
0
0
0
0
0
0
0
0
0
0
9
21
32
35
42
51
62
66
62
68
72
68
46

High Clouds (% Sky Obscured)

98
100
100
98
100
78
54
75
75
60
62
55
32
13
22
47
44
27
17
4
4
6
2
26

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
Very Light Rain
None
None
None

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
2
4
20
30
36
49
48
41
31

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

17
18
19
18
18
17
17
18
17
16
14
12
9
8
8
7
7
7
6
6
5
4
4
4

Chance of Frost

Temperature (°C)

10
12
13
14
16
17
18
18
18
17
16
15
13
12
11
11
11
10
10
10
10
10
9
10

Feels Like (°C)

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

Dew Point (°C)

5
6
6
7
7
8
8
8
8
9
9
9
9
7
7
7
7
6
7
7
7
7
7
7

Relative Humidity (%)

69
67
62
59
56
54
52
52
54
58
64
68
75
73
75
76
76
76
77
78
78
80
82
81

Pressure (mb)

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

Ozone (du)

370
369
369
370
371
373
374
373
372
371
371
371
371
371
372
372
372
371
371
370
368
366
366
366

Friday 1

Full Moon 100%

20:58

05:26

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
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad

Sun - Rise: 05:42, Set: 20:36, Transit: 13:10. Moon - Rise: 20:58, Set: 05:26. Civil Dark: 21:14 - 05:03. Nautical Dark: 22:04 - 04:13. Astro Dark: 23:05 - 03:10

Total Clouds (% Sky Obscured)

100
100
99
100
100
100
100
100
100
100
100
100
99
99
97
95
93
95
97
99
97
94
80
92

Low Clouds (% Sky Obscured)

80
70
70
71
72
76
77
82
83
81
72
73
74
75
81
83
86
77
67
57
65
73
80
74

Medium Clouds (% Sky Obscured)

28
7
18
31
47
52
46
50
43
42
33
33
33
33
26
15
15
16
11
2
0
15
5
23

High Clouds (% Sky Obscured)

51
80
58
68
71
96
100
100
100
100
100
94
90
86
67
52
35
53
75
97
87
76
56
71

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 (%)

20
3
2
4
3
7
10
8
6
8
7
8
13
9
10
10
6
12
14
4
7
7
2
8

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)

5
7
8
8
7
8
9
10
11
10
10
9
7
6
6
6
6
6
6
5
5
5
4
3

Chance of Frost

Temperature (°C)

11
12
12
14
15
15
16
17
17
16
15
14
13
12
11
10
10
10
9
9
9
9
8
9

Feels Like (°C)

9
10
11
13
14
15
16
16
15
14
13
13
11
10
8
8
8
7
7
7
7
7
6
9

Dew Point (°C)

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

Relative Humidity (%)

79
81
81
82
78
77
73
72
72
77
76
79
81
81
84
87
87
87
88
90
91
95
95
96

Pressure (mb)

1017
1017
1018
1018
1017
1017
1017
1017
1017
1016
1016
1016
1016
1017
1017
1016
1016
1016
1016
1015
1015
1015
1015
1014

Ozone (du)

366
367
367
366
365
365
365
364
363
362
361
361
362
362
363
364
365
367
368
368
372
378
383
385

Saturday 2

Waning Gibbous 98%

22:12

05:49

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 OK
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad

Sun - Rise: 05:40, Set: 20:38, Transit: 13:10. Moon - Rise: 22:12, Set: 05:49. Civil Dark: 21:16 - 05:01. Nautical Dark: 22:06 - 04:11. Astro Dark: 23:09 - 03:07

Total Clouds (% Sky Obscured)

96
100
100
100
100
99
98
98
76
54
32
35
39
44
43
41
39
50
61
72
72
83
87
88

Low Clouds (% Sky Obscured)

68
61
57
53
49
51
52
54
48
42
32
35
39
41
41
41
39
50
60
70
60
47
35
41

Medium Clouds (% Sky Obscured)

39
31
47
78
96
81
72
70
52
33
7
16
25
33
24
16
7
6
6
2
3
3
4
7

High Clouds (% Sky Obscured)

84
100
98
100
100
91
73
52
28
17
1
4
5
3
1
1
0
0
0
0
0
0
0
0

ISS Passover

Visibility (miles)

9
9
9
9
9
9
8
7
5
7
8
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
7
13
11
15
32
41
47
48
47
43
35
26
6
9
6
1
3
3
2
4
6
2
8

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)

5
7
9
9
9
9
9
10
10
9
8
9
8
6
4
4
4
4
4
4
4
4
4
4

Chance of Frost

Temperature (°C)

11
12
13
14
14
15
15
15
15
14
14
14
12
11
9
9
8
8
8
8
8
8
8
8

Feels Like (°C)

9
10
10
11
11
12
12
13
13
12
12
12
12
12
10
10
9
8
7
7
7
7
7
7

Dew Point (°C)

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

Relative Humidity (%)

88
86
80
78
76
74
78
80
83
83
83
84
87
91
95
95
95
96
96
96
95
95
95
93

Pressure (mb)

1014
1014
1014
1014
1014
1013
1013
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012
1013

Ozone (du)

389
388
383
383
385
388
390
392
393
391
389
387
387
387
386
387
388
389
388
388
388
386
385
384

Sunday 3

Waning Gibbous 95%

23:22

06:20

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 OK
23 OK
00 OK
01 OK
02 OK
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad

Sun - Rise: 05:38, Set: 20:39, Transit: 13:09. Moon - Rise: 23:22, Set: 06:20. Civil Dark: 21:18 - 04:59. Nautical Dark: 22:08 - 04:08. Astro Dark: 23:12 - 03:03

Total Clouds (% Sky Obscured)

84
82
76
68
60
56
56
57
53
53
56
49
43
39
35
32
28
34
39
45
53
61
69
77

Low Clouds (% Sky Obscured)

47
51
42
33
24
31
42
54
48
41
34
35
36
37
34
31
27
18
9
1
8
17
32
51

Medium Clouds (% Sky Obscured)

10
13
17
13
10
14
18
19
19
19
19
10
6
2
2
2
2
13
25
36
31
26
18
19

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
0

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 (%)

9
9
15
18
20
25
28
29
27
25
18
22
18
5
6
3
0
0
0
0
0
0
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)

5
7
8
7
7
6
7
7
8
7
7
6
6
5
4
4
4
4
4
4
4
4
3
3

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

7
8
9
9
9
10
14
13
13
13
13
13
10
10
9
8
7
7
6
6
6
6
6
5

Dew Point (°C)

8
8
8
8
8
8
8
9
9
9
10
10
9
8
8
7
6
6
6
6
6
6
7
7

Relative Humidity (%)

88
83
77
72
68
63
64
67
68
71
76
80
84
91
96
96
94
94
96
96
96
94
94
91

Pressure (mb)

1013
1013
1013
1013
1013
1013
1013
1013
1012
1012
1012
1013
1013
1013
1013
1014
1014
1014
1014
1013
1013
1013
1013
1013

Ozone (du)

384
383
383
382
382
381
381
381
382
382
382
383
385
388
390
390
390
390
392
395
398
397
396
396

Monday 4

Waning Gibbous 90%

00:25

07:02

Sun - Rise: 05:36, Set: 20:41, Transit: 13:09. Moon - Rise: 00:25, Set: 07:02. Civil Dark: 21:20 - 04:57. Nautical Dark: 22:11 - 04:06. Astro Dark: 23:16 - 02:59

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 Barry, Vale of Glamorgan, United Kingdom (51.40,-3.28)

Generated: 28/04/26 07:53:54. Forecast: 28/04/26 to 04/05/26. Timezone: UTC+1.00