Clear Outside v1.0 - International Weather Forecasts For Astronomers

Tuesday 23

Waxing Crescent 12%

10:47

19:31

00 Bad
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

Sun - Rise: 08:16, Set: 16:08, Transit: 12:12. Moon - Rise: 10:47, Set: 19:31. Civil Dark: 16:48 - 07:36. Nautical Dark: 17:31 - 06:53. Astro Dark: 18:11 - 06:13

Total Clouds (% Sky Obscured)

100
99
99
98
96
99
99
100
100
100
100
100
100
100
97
97
98
100
100
97
94
78
90
88

Low Clouds (% Sky Obscured)

89
91
90
81
66
63
84
92
94
100
95
95
78
85
91
94
95
100
100
93
93
78
88
86

Medium Clouds (% Sky Obscured)

54
55
52
54
71
66
31
37
55
37
60
73
95
100
75
20
20
44
48
16
28
2
4
0

High Clouds (% Sky Obscured)

57
62
54
72
69
88
92
100
100
100
100
100
100
100
79
73
28
18
25
18
7
5
3
2

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
1
34
29
9
16
15
4
0
0
0
0
0
0
0
1
1
2
1
0
0
0
1
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
12
11
11
10
11
12
13
12
13
13
13
14
16
16
18
19
18
18
16
17
17
17
19

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

5
5
5
5
6
6
5
4
5
3
3
2
2
1
2
1
0
0
0
1
0
0
1
-1

Dew Point (°C)

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

Relative Humidity (%)

93
93
95
93
93
93
93
93
90
90
88
87
85
87
88
84
82
81
79
82
79
82
83
82

Pressure (mb)

1011
1011
1012
1012
1012
1012
1013
1014
1015
1016
1017
1018
1019
1019
1019
1020
1021
1022
1022
1023
1024
1025
1025
1026

Ozone (du)

363
364
367
367
364
358
351
350
352
354
357
360
359
358
357
353
350
345
343
342
341
339
336
332

Wednesday 24

Waxing Crescent 19%

11:04

20:49

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

Sun - Rise: 08:17, Set: 16:08, Transit: 12:13. Moon - Rise: 11:04, Set: 20:49. Civil Dark: 16:48 - 07:37. Nautical Dark: 17:31 - 06:54. Astro Dark: 18:12 - 06:13

Total Clouds (% Sky Obscured)

92
92
87
85
73
73
77
69
52
64
95
74
68
57
23
50
72
52
56
39
47
41
35
29

Low Clouds (% Sky Obscured)

90
89
82
81
73
72
73
68
50
64
58
65
66
55
19
50
72
52
56
39
46
41
35
29

Medium Clouds (% Sky Obscured)

0
0
0
0
0
2
2
2
2
5
40
50
41
22
2
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

1
1
1
0
5
11
21
14
5
1
82
44
5
5
5
1
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 (%)

2
1
2
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)

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

Chance of Frost

Temperature (°C)

5
5
6
6
6
5
5
4
4
4
4
4
5
5
5
5
4
4
4
4
4
4
4
4

Feels Like (°C)

-2
-1
-1
-1
-1
-1
-2
-2
-3
-2
-2
-3
-2
-2
-2
-3
-2
-2
-2
-2
-4
-3
-2
-2

Dew Point (°C)

2
2
2
2
2
2
2
1
1
1
1
1
1
0
0
0
0
0
1
0
-1
-2
-2
-2

Relative Humidity (%)

79
80
79
79
76
79
82
79
83
82
80
77
75
72
71
73
76
77
80
76
68
67
67
68

Pressure (mb)

1027
1027
1028
1028
1028
1029
1030
1031
1031
1032
1033
1034
1034
1033
1033
1034
1034
1034
1034
1034
1034
1034
1034
1033

Ozone (du)

330
329
331
331
328
326
325
324
322
321
322
322
322
323
325
330
328
328
329
329
330
332
335
336

Thursday 25

Waxing Crescent 28%

11:17

22:07

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

Sun - Rise: 08:17, Set: 16:09, Transit: 12:13. Moon - Rise: 11:17, Set: 22:07. Civil Dark: 16:49 - 07:37. Nautical Dark: 17:32 - 06:54. Astro Dark: 18:13 - 06:13

Total Clouds (% Sky Obscured)

21
30
28
26
23
29
29
9
2
1
1
1
3
0
0
5
0
8
22
32
45
49
69
66

Low Clouds (% Sky Obscured)

21
30
28
26
23
29
29
9
0
0
1
1
0
0
0
5
0
8
22
32
45
49
64
60

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
2
0
0
0
0
0
0
0
0
2
32
22

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
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)

19
19
19
20
21
21
22
23
23
22
23
26
25
25
23
22
20
20
18
18
17
18
18
17

Chance of Frost

Temperature (°C)

3
3
3
3
3
3
3
3
3
3
3
4
4
4
4
4
3
3
2
2
2
2
2
2

Feels Like (°C)

-3
-3
-3
-4
-4
-4
-4
-5
-4
-4
-4
-4
-4
-4
-3
-3
-3
-3
-4
-4
-4
-4
-4
-5

Dew Point (°C)

-1
-1
0
-0
0
-0
-1
-1
-1
-1
-1
-1
-2
-2
-2
-3
-3
-4
-4
-4
-4
-4
-4
-3

Relative Humidity (%)

74
76
82
82
83
82
80
80
79
77
74
71
66
64
62
62
63
63
65
66
66
68
69
70

Pressure (mb)

1033
1032
1032
1032
1031
1030
1030
1029
1029
1029
1028
1028
1027
1027
1027
1027
1027
1027
1028
1029
1029
1029
1029
1030

Ozone (du)

337
340
341
342
345
346
346
349
353
356
354
355
355
353
350
351
350
349
350
348
350
357
364
365

Friday 26

Waxing Crescent 39%

11:29

23:25

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

Sun - Rise: 08:17, Set: 16:10, Transit: 12:14. Moon - Rise: 11:29, Set: 23:25. Civil Dark: 16:50 - 07:37. Nautical Dark: 17:33 - 06:54. Astro Dark: 18:13 - 06:14

Total Clouds (% Sky Obscured)

80
49
47
47
48
48
47
47
43
42
39
37
37
31
30
34
72
62
22
20
15
18
6
2

Low Clouds (% Sky Obscured)

60
49
47
47
48
48
47
47
43
42
39
37
37
31
30
34
45
45
22
16
2
0
0
0

Medium Clouds (% Sky Obscured)

30
2
0
0
0
0
0
0
0
0
0
0
0
0
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
1
3
19
15
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
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)

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

Chance of Frost

Temperature (°C)

2
2
2
2
1
1
1
1
1
2
2
3
4
4
4
4
3
3
3
3
3
4
4
4

Feels Like (°C)

-5
-5
-4
-3
-3
-3
-3
-3
-3
-3
-2
-2
-2
-2
-2
-2
-2
-4
-3
-2
-2
-2
-2
-2

Dew Point (°C)

-3
-3
-3
-3
-3
-3
-3
-3
-2
-2
-1
-1
0
0
1
1
1
1
2
1
1
1
1
1

Relative Humidity (%)

71
71
71
71
73
73
74
74
77
77
77
74
77
77
79
80
83
86
88
86
86
82
79
82

Pressure (mb)

1030
1030
1030
1030
1030
1030
1030
1031
1031
1031
1031
1031
1031
1031
1031
1031
1031
1031
1032
1032
1032
1032
1032
1032

Ozone (du)

361
356
353
349
347
344
341
339
338
337
337
335
334
334
334
333
333
332
333
334
334
333
334
332

Saturday 27

First Quarter 50%

11:41

No Set

00 OK
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 OK
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad

Sun - Rise: 08:17, Set: 16:11, Transit: 12:14. Moon - Rise: 11:41, Set: No Set. Civil Dark: 16:50 - 07:38. Nautical Dark: 17:33 - 06:55. Astro Dark: 18:14 - 06:14

Total Clouds (% Sky Obscured)

31
54
54
48
61
75
79
76
64
63
59
55
48
43
45
49
55
60
58
60
62
59
57
52

Low Clouds (% Sky Obscured)

14
29
43
45
46
48
53
59
64
63
59
55
48
43
45
49
55
60
58
60
62
59
57
52

Medium Clouds (% Sky Obscured)

0
0
0
20
40
60
40
20
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

0
0
0
28
60
75
63
30
0
0
0
0
0
0
0
12
31
51
46
32
4
32
57
52

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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-2
-3
-3
-3
-2
-1
-1
0
1
1
1
2
3
2
3
3
3
2
2
2
2
1
1
1

Dew Point (°C)

2
1
1
1
2
2
2
2
3
3
3
4
4
4
4
4
4
3
3
3
3
3
3
3

Relative Humidity (%)

88
83
80
80
83
86
86
88
89
89
86
83
84
82
82
81
81
79
78
82
83
86
86
85

Pressure (mb)

1033
1033
1033
1033
1033
1033
1033
1034
1034
1035
1035
1035
1035
1035
1035
1035
1035
1035
1036
1036
1036
1036
1036
1036

Ozone (du)

329
327
326
326
325
325
323
322
321
319
319
318
315
314
312
311
309
308
306
305
304
304
304
304

Sunday 28

Waxing Gibbous 61%

11:53

00:46

00 Bad
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

Sun - Rise: 08:18, Set: 16:11, Transit: 12:15. Moon - Rise: 11:53, Set: 00:46. Civil Dark: 16:51 - 07:38. Nautical Dark: 17:34 - 06:55. Astro Dark: 18:15 - 06:14

Total Clouds (% Sky Obscured)

52
52
46
53
60
81
79
78
77
77
77
77
73
68
62
57
56
59
56
54
55
57
62
65

Low Clouds (% Sky Obscured)

52
52
46
53
60
74
74
73
72
74
77
77
73
68
62
57
56
59
56
54
55
57
62
65

Medium Clouds (% Sky Obscured)

2
9
12
8
3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

52
52
46
53
60
77
60
44
28
19
9
0
0
0
0
0
0
0
0
0
0
0
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
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 (%)

1
1
0
0
0
0
0
0
0
7
10
11
9
6
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
16
16
16
17
17
17
16
15
14
14
15
15
15
15
15
14
13
12
11
10
9
9
9

Chance of Frost

Temperature (°C)

5
5
4
4
4
5
5
5
5
5
5
5
6
6
6
6
6
5
5
4
4
3
3
3

Feels Like (°C)

0
0
0
0
-0
-1
-1
-1
-2
-2
-2
-1
-1
0
0
0
0
1
1
1
1
1
1
1

Dew Point (°C)

3
3
3
3
2
2
1
1
1
1
2
2
3
3
2
3
2
3
2
2
2
2
1
1

Relative Humidity (%)

85
86
88
88
85
82
78
78
78
78
79
79
80
79
78
78
79
82
83
85
88
89
89
89

Pressure (mb)

1036
1036
1036
1035
1035
1035
1035
1035
1035
1035
1035
1035
1035
1035
1034
1034
1034
1034
1035
1035
1035
1035
1035
1035

Ozone (du)

304
303
303
302
302
302
303
303
304
305
304
302
301
301
300
300
300
300
301
301
301
302
302
302

Monday 29

Waxing Gibbous 72%

12:08

02:10

Sun - Rise: 08:18, Set: 16:12, Transit: 12:15. Moon - Rise: 12:08, Set: 02:10. Civil Dark: 16:52 - 07:38. Nautical Dark: 17:35 - 06:55. Astro Dark: 18:16 - 06:14

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: 23/12/25 00:05:56. Forecast: 23/12/25 to 29/12/25. Timezone: UTC+0.00