Clear Outside v1.0 - International Weather Forecasts For Astronomers

Friday 28

Full Moon 99%

20:16

06:31

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 OK
16 OK
17 Good
18 OK
19 OK
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad
01 Bad

Sun - Rise: 06:22, Set: 20:17, Transit: 13:19. Moon - Rise: 20:16, Set: 06:31. Civil Dark: 20:54 - 05:45. Nautical Dark: 21:40 - 04:59. Astro Dark: 22:33 - 04:06

Total Clouds (% Sky Obscured)

100
95
100
98
98
98
99
93
97
92
98
79
50
11
11
10
35
30
56
82
40
55
88
80

Low Clouds (% Sky Obscured)

81
68
84
87
81
74
83
81
68
54
57
45
27
10
11
10
34
28
8
5
16
27
29
30

Medium Clouds (% Sky Obscured)

77
81
91
79
79
88
88
46
54
75
96
60
6
4
2
2
9
8
3
6
35
8
4
8

High Clouds (% Sky Obscured)

82
93
89
19
85
73
49
13
35
12
2
2
36
0
0
0
0
0
54
80
5
27
78
62

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 (%)

31
40
47
24
24
29
41
36
38
31
38
17
10
3
1
1
8
4
7
15
14
13
5
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

96
96
96
96
95
96
95
92
93
92
89
89
90
89
89
86
86
88
93
93
93
93
95
95

Pressure (mb)

1005
1004
1004
1004
1003
1003
1003
1003
1003
1003
1004
1004
1004
1004
1004
1004
1004
1004
1004
1004
1004
1004
1004
1004

Ozone (du)

333
334
335
334
334
335
333
330
331
331
329
328
328
327
327
328
327
323
320
316
313
312
310
306

Saturday 29

Waning Gibbous 99%

20:26

07:50

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
01 Bad

Sun - Rise: 06:23, Set: 20:14, Transit: 13:19. Moon - Rise: 20:26, Set: 07:50. Civil Dark: 20:51 - 05:47. Nautical Dark: 21:37 - 05:01. Astro Dark: 22:29 - 04:09

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
84
61
70
73
90
78
58
39
73
79
80
81
57

Low Clouds (% Sky Obscured)

48
56
82
63
59
68
71
67
63
71
60
52
10
5
29
44
43
45
39
46
63
64
73
53

Medium Clouds (% Sky Obscured)

5
91
99
100
100
100
100
100
100
100
69
45
12
9
53
90
78
10
5
13
13
14
17
13

High Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
64
75
98
67
55
50
40
3
0
0
0
0
0
0
0
0

ISS Passover

Visibility (miles)

9
9
9
9
4
2
4
3
3
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
Light Rain
None
Very Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Very Light Rain
Very Light Rain
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

7
18
51
46
63
85
95
95
87
70
58
40
11
8
7
22
39
28
18
22
21
14
24
5

Precipitation Amount (mm)

0
0
0.4
0
0.2
0.4
0.4
0.7
0.4
0.3
0.2
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

16
16
15
15
15
16
16
16
17
16
16
15
14
13
15
16
16
17
16
15
15
15
15
15

Relative Humidity (%)

95
93
92
90
92
96
95
93
96
93
92
86
79
77
83
82
86
93
95
95
93
92
90
90

Pressure (mb)

1003
1003
1003
1002
1002
1001
1001
1001
1001
1001
1001
1001
1001
1002
1002
1002
1003
1003
1004
1005
1005
1006
1006
1006

Ozone (du)

304
304
305
307
307
307
310
310
314
318
319
321
322
318
317
317
318
324
325
328
327
327
327
327

Sunday 30

Waning Gibbous 96%

20:35

09:11

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
01 Bad

Sun - Rise: 06:25, Set: 20:12, Transit: 13:19. Moon - Rise: 20:35, Set: 09:11. Civil Dark: 20:49 - 05:49. Nautical Dark: 21:34 - 05:03. Astro Dark: 22:26 - 04:11

Total Clouds (% Sky Obscured)

51
54
42
44
46
66
66
79
100
100
100
100
100
100
97
93
88
92
96
100
95
89
84
79

Low Clouds (% Sky Obscured)

39
54
42
44
46
44
60
15
49
37
41
44
56
59
56
53
52
50
48
47
47
48
49
53

Medium Clouds (% Sky Obscured)

16
16
4
15
2
0
0
38
86
74
100
79
57
40
46
62
70
80
85
91
62
34
13
13

High Clouds (% Sky Obscured)

0
0
0
0
0
66
62
67
86
100
100
100
100
99
91
81
76
83
92
100
80
62
59
41

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
5
9
9
5
7
4
9
9
9
9
9
7
8
8
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
Light Rain
None
None
None
None
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
None
None
None
None
Light Rain
Very Light Rain
Very Light Rain
Light Rain
Very Light Rain

Precipitation Probability (%)

6
29
33
63
38
13
8
19
63
95
95
92
95
95
81
45
35
39
51
71
62
65
70
57

Precipitation Amount (mm)

0
0
0
0.5
0
0
0
0
0.4
1
1.8
0.7
0.7
0.8
0.4
0
0
0
0
0.4
0.2
0.3
0.4
0.2

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

15
16
17
17
17
16
16
16
17
16
15
14
14
15
14
14
15
14
14
14
13
13
14
15

Dew Point (°C)

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

Relative Humidity (%)

90
90
90
90
92
93
90
88
83
80
81
78
78
81
86
92
89
87
90
89
90
90
89
89

Pressure (mb)

1006
1006
1006
1006
1006
1006
1006
1006
1005
1005
1004
1004
1003
1003
1002
1002
1001
1001
1001
1001
1001
1001
1001
1002

Ozone (du)

326
326
326
325
325
326
326
326
325
326
326
325
325
324
324
326
330
332
333
332
333
333
333
333

Monday 31

Waning Gibbous 91%

20:46

10:33

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
01 Bad

Sun - Rise: 06:27, Set: 20:10, Transit: 13:18. Moon - Rise: 20:46, Set: 10:33. Civil Dark: 20:46 - 05:50. Nautical Dark: 21:31 - 05:05. Astro Dark: 22:22 - 04:14

Total Clouds (% Sky Obscured)

73
67
66
70
86
91
95
97
92
88
83
86
92
100
100
100
100
100
100
100
100
100
100
50

Low Clouds (% Sky Obscured)

55
57
54
56
75
74
76
71
68
66
44
28
20
11
34
24
40
32
23
45
52
54
58
32

Medium Clouds (% Sky Obscured)

17
17
15
17
15
18
24
24
16
11
4
70
50
92
94
97
98
99
100
100
100
99
66
15

High Clouds (% Sky Obscured)

21
0
0
0
0
4
75
75
10
71
67
72
81
100
100
100
100
100
100
100
81
93
62
40

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
7
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

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

Precipitation Probability (%)

60
67
46
36
40
40
36
32
27
13
5
10
13
16
11
12
20
17
12
28
33
34
21
12

Precipitation Amount (mm)

0.3
0.5
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

13
13
13
13
13
13
13
13
14
13
13
12
11
10
10
10
11
12
12
12
11
13
13
13

Relative Humidity (%)

90
90
93
93
93
92
92
90
90
86
81
77
72
67
64
65
68
73
75
75
74
83
86
85

Pressure (mb)

1002
1003
1003
1004
1005
1006
1007
1008
1009
1010
1011
1011
1012
1012
1012
1013
1013
1013
1013
1014
1014
1014
1014
1014

Ozone (du)

334
335
333
331
332
332
330
329
326
322
322
321
319
320
319
319
318
317
316
317
319
322
324
325

Tuesday 1

Waning Gibbous 83%

21:01

11:59

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
01 Bad

Sun - Rise: 06:29, Set: 20:07, Transit: 13:18. Moon - Rise: 21:01, Set: 11:59. Civil Dark: 20:44 - 05:52. Nautical Dark: 21:29 - 05:07. Astro Dark: 22:19 - 04:17

Total Clouds (% Sky Obscured)

80
45
70
55
80
68
81
95
91
88
87
80
75
67
78
88
99
98
98
98
83
68
53
50

Low Clouds (% Sky Obscured)

51
39
47
38
53
42
48
50
58
68
76
59
45
29
25
27
25
34
41
51
53
59
53
50

Medium Clouds (% Sky Obscured)

15
15
15
16
9
14
29
42
41
37
34
25
14
1
14
28
41
34
29
31
27
21
12
9

High Clouds (% Sky Obscured)

20
0
0
0
0
18
37
52
35
16
2
8
17
28
61
80
95
94
94
94
67
39
11
7

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
Very Light Rain
Light Rain
Light Rain
Light Rain
Light Rain

Precipitation Probability (%)

5
3
6
4
2
14
19
20
35
38
36
39
44
41
45
51
45
45
50
64
89
95
95
91

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.3
0.6
0.9
1.2
0.6

Wind Speed/Direction (mph)

12
12
12
11
10
12
12
14
16
17
19
20
19
18
18
16
15
14
15
16
17
17
18
18

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

13
13
13
13
14
13
13
13
13
13
14
14
15
14
13
14
14
15
15
15
17
17
16
16

Dew Point (°C)

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

Relative Humidity (%)

85
85
86
86
86
86
85
83
82
83
86
88
86
83
81
83
85
86
85
83
81
82
83
85

Pressure (mb)

1014
1014
1014
1014
1014
1014
1014
1014
1014
1014
1014
1014
1014
1013
1013
1013
1013
1012
1012
1012
1012
1012
1012
1011

Ozone (du)

328
331
332
332
334
334
332
330
328
327
326
324
325
325
325
326
327
328
330
331
333
335
336
338

Wednesday 2

Waning Gibbous 74%

21:21

13:28

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 OK
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad
01 Bad

Sun - Rise: 06:30, Set: 20:05, Transit: 13:18. Moon - Rise: 21:21, Set: 13:28. Civil Dark: 20:41 - 05:54. Nautical Dark: 21:26 - 05:09. Astro Dark: 22:16 - 04:19

Total Clouds (% Sky Obscured)

51
52
48
48
44
51
59
69
76
79
82
73
56
36
48
56
67
72
77
83
77
70
62
65

Low Clouds (% Sky Obscured)

51
52
48
48
44
49
44
43
39
36
32
23
13
3
11
19
27
24
23
26
40
54
62
61

Medium Clouds (% Sky Obscured)

6
3
3
4
4
3
2
0
0
0
0
24
47
36
48
56
67
72
71
65
65
65
62
65

High Clouds (% Sky Obscured)

3
0
0
0
0
18
31
42
41
39
42
33
16
6
15
25
35
49
64
80
52
26
0
1

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
7
5
2

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

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

Precipitation Probability (%)

65
17
15
17
15
18
15
7
6
3
1
4
2
0
0
0
0
12
22
32
71
95
95
95

Precipitation Amount (mm)

0.3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.5
0.9
1.4
1.6

Wind Speed/Direction (mph)

15
13
12
11
10
9
9
9
9
9
11
12
14
15
17
17
17
17
17
18
18
19
21
22

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

85
85
85
83
83
83
80
78
75
74
71
68
68
69
68
70
73
74
79
85
90
92
93
95

Pressure (mb)

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

Ozone (du)

337
337
337
333
330
326
324
321
318
316
314
312
310
308
306
305
304
303
301
299
297
297
296
295

Thursday 3

Waning Gibbous 63%

21:50

14:57

Sun - Rise: 06:32, Set: 20:02, Transit: 13:17. Moon - Rise: 21:50, Set: 14:57. Civil Dark: 20:39 - 05:56. Nautical Dark: 21:23 - 05:12. Astro Dark: 22:13 - 04:22

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 Holyhead, Anglesey, United Kingdom (53.30,-4.65)

Generated: 28/08/26 02:56:21. Forecast: 28/08/26 to 03/09/26. Timezone: UTC+1.00