Clear Outside v1.0 - International Weather Forecasts For Astronomers

Saturday 20

New Moon 2%

10:01

17:02

22 Bad
23 Bad
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

Sun - Rise: 08:20, Set: 16:09, Transit: 12:15. Moon - Rise: 10:01, Set: 17:02. Civil Dark: 16:49 - 07:40. Nautical Dark: 17:33 - 06:57. Astro Dark: 18:14 - 06:16

Total Clouds (% Sky Obscured)

100
99
100
100
77
61
69
66
76
100
98
90
99
100
95
93
96
100
100
100
100
99
100
100

Low Clouds (% Sky Obscured)

85
67
73
50
49
46
44
55
42
47
52
46
49
33
75
82
80
89
89
89
67
63
80
95

Medium Clouds (% Sky Obscured)

97
99
100
52
2
2
64
50
45
30
75
75
80
100
87
73
78
97
100
100
100
94
100
100

High Clouds (% Sky Obscured)

77
99
85
100
44
60
52
45
75
100
97
67
98
77
75
88
90
100
100
100
86
89
100
100

ISS Passover

Visibility (miles)

2
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
8
9
9
7
7
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

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

Precipitation Probability (%)

95
95
47
25
14
3
2
1
1
0
0
0
3
4
13
24
27
41
62
28
27
58
62
81

Precipitation Amount (mm)

0.6
3.4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.5
0
0
0.3
0.3
0.5

Wind Speed/Direction (mph)

20
18
16
14
11
9
8
7
6
6
7
7
7
8
9
11
12
11
11
12
12
12
9
9

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

93
93
85
87
88
88
87
87
87
88
86
87
85
84
85
85
85
87
85
85
87
90
93
93

Pressure (mb)

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

Ozone (du)

307
308
311
316
325
336
337
341
348
358
365
381
388
390
388
388
385
383
381
380
381
384
385
387

Sunday 21

Waxing Crescent 6%

10:30

18:16

22 Bad
23 Bad
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

Sun - Rise: 08:21, Set: 16:10, Transit: 12:15. Moon - Rise: 10:30, Set: 18:16. Civil Dark: 16:50 - 07:40. Nautical Dark: 17:33 - 06:57. Astro Dark: 18:14 - 06:16

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
91
100
90
89
87
90
74
80
68
58
57
72
72
56
63
72
73

Low Clouds (% Sky Obscured)

79
78
61
60
72
73
77
82
82
82
81
84
82
69
69
57
44
41
57
38
30
38
42
52

Medium Clouds (% Sky Obscured)

100
100
100
100
95
100
71
44
39
20
19
5
12
5
9
37
4
7
2
15
13
25
27
21

High Clouds (% Sky Obscured)

100
100
100
100
100
65
40
39
96
33
42
40
35
32
30
30
29
19
20
41
4
35
22
46

ISS Passover

Visibility (miles)

6
7
7
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

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

Precipitation Probability (%)

88
72
51
46
52
54
53
45
35
17
3
1
0
0
0
0
0
0
0
0
0
0
1
0

Precipitation Amount (mm)

0.6
0.4
0
0
0
0
0.3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

93
88
93
91
90
90
91
91
91
88
88
87
85
83
80
81
81
83
85
87
88
88
87
88

Pressure (mb)

1004
1003
1003
1003
1003
1003
1003
1003
1003
1004
1004
1005
1005
1006
1006
1006
1007
1007
1007
1008
1009
1010
1010
1011

Ozone (du)

386
385
386
386
386
387
387
389
391
394
392
391
392
392
392
391
389
386
383
378
376
369
367
363

Monday 22

Waxing Crescent 12%

10:52

19:34

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

Sun - Rise: 08:21, Set: 16:10, Transit: 12:16. Moon - Rise: 10:52, Set: 19:34. Civil Dark: 16:50 - 07:41. Nautical Dark: 17:34 - 06:57. Astro Dark: 18:15 - 06:17

Total Clouds (% Sky Obscured)

75
62
90
90
93
95
100
100
97
96
94
80
62
33
28
28
21
15
24
17
32
49
83
97

Low Clouds (% Sky Obscured)

27
25
16
27
49
46
48
44
52
73
79
70
26
0
0
27
19
0
24
13
31
49
77
76

Medium Clouds (% Sky Obscured)

29
25
39
42
43
33
21
12
71
74
51
5
10
4
3
3
2
4
4
2
14
29
66
86

High Clouds (% Sky Obscured)

45
15
38
41
40
74
100
100
67
38
32
30
44
33
28
6
5
11
4
6
5
3
2
3

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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

5
5
5
4
4
5
4
4
4
3
3
3
4
5
7
7
8
7
5
4
4
3
3
2

Dew Point (°C)

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

Relative Humidity (%)

87
87
87
88
87
87
87
87
88
88
88
88
88
85
81
81
82
84
87
88
88
90
90
88

Pressure (mb)

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

Ozone (du)

358
356
354
353
352
351
351
351
350
353
356
350
349
345
344
341
337
332
330
327
327
332
332
331

Tuesday 23

Waxing Crescent 19%

11:08

20:52

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

Sun - Rise: 08:21, Set: 16:11, Transit: 12:16. Moon - Rise: 11:08, Set: 20:52. Civil Dark: 16:51 - 07:41. Nautical Dark: 17:34 - 06:58. Astro Dark: 18:15 - 06:17

Total Clouds (% Sky Obscured)

82
53
100
100
100
100
100
100
100
100
99
99
98
61
46
46
51
33
32
9
13
28
47
47

Low Clouds (% Sky Obscured)

75
53
71
72
66
79
90
92
93
94
96
83
60
54
45
39
34
23
12
1
8
15
21
22

Medium Clouds (% Sky Obscured)

74
49
98
99
100
97
95
93
91
91
91
77
64
4
0
0
0
0
0
2
3
11
3
0

High Clouds (% Sky Obscured)

3
5
19
24
30
62
62
51
39
27
30
52
52
52
45
40
51
33
31
2
1
11
40
30

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
1
1
1
3
2
3
2
4
1
2
1
0
0
2
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)

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

Chance of Frost

Temperature (°C)

6
5
5
6
6
6
6
6
6
6
6
6
6
6
6
6
6
5
5
4
3
3
3
2

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

85
86
88
85
83
82
82
82
81
78
75
78
79
78
75
72
72
72
73
77
77
74
73
72

Pressure (mb)

1024
1025
1025
1025
1025
1026
1026
1026
1026
1027
1028
1029
1029
1030
1030
1030
1030
1031
1031
1032
1032
1033
1033
1033

Ozone (du)

329
325
325
326
326
324
324
324
325
324
322
320
320
321
322
321
321
319
320
322
324
328
330
329

Wednesday 24

Waxing Crescent 28%

11:21

No Set

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

Sun - Rise: 08:22, Set: 16:12, Transit: 12:17. Moon - Rise: 11:21, Set: No Set. Civil Dark: 16:52 - 07:41. Nautical Dark: 17:35 - 06:58. Astro Dark: 18:16 - 06:17

Total Clouds (% Sky Obscured)

47
27
15
15
14
12
9
6
4
2
2
2
2
0
0
0
0
1
2
3
5
6
7
6

Low Clouds (% Sky Obscured)

22
22
15
15
14
12
9
6
4
2
1
1
1
0
0
0
0
0
0
0
0
1
1
1

Medium Clouds (% Sky Obscured)

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

High Clouds (% Sky Obscured)

20
4
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
1

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)

10
9
9
9
10
11
12
12
13
13
13
13
14
16
17
18
18
18
19
19
20
18
17
16

Chance of Frost

Temperature (°C)

2
2
2
1
1
1
1
1
1
1
1
1
2
4
5
4
4
4
4
3
3
2
2
2

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

72
70
73
74
74
75
77
78
78
78
83
83
80
76
71
72
72
73
73
76
76
77
79
79

Pressure (mb)

1034
1034
1034
1034
1034
1033
1033
1033
1033
1033
1033
1033
1033
1032
1031
1031
1030
1030
1030
1030
1030
1030
1030
1030

Ozone (du)

330
332
330
330
330
329
330
331
333
333
334
334
334
335
337
340
343
346
349
352
354
354
354
354

Thursday 25

Waxing Crescent 39%

11:33

22:10

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

Sun - Rise: 08:22, Set: 16:12, Transit: 12:17. Moon - Rise: 11:33, Set: 22:10. Civil Dark: 16:52 - 07:42. Nautical Dark: 17:36 - 06:58. Astro Dark: 18:17 - 06:18

Total Clouds (% Sky Obscured)

5
4
4
4
5
5
4
3
7
10
16
36
52
79
74
77
72
67
63
63
63
67
68
66

Low Clouds (% Sky Obscured)

1
1
1
1
2
2
1
1
7
10
16
36
52
79
74
77
72
67
63
63
63
67
57
52

Medium Clouds (% Sky Obscured)

1
0
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
6
10
16
13
7
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 (%)

2
2
0
0
0
0
0
0
0
0
0
1
1
0
1
1
0
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)

14
13
12
11
10
9
9
9
9
9
9
9
10
11
13
13
13
13
12
11
10
10
9
9

Chance of Frost

Temperature (°C)

2
2
2
2
1
1
1
1
1
1
1
1
2
3
5
4
4
4
3
2
1
1
1
0

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

79
80
78
80
83
84
83
81
78
80
81
83
77
73
68
68
69
71
73
79
83
83
83
81

Pressure (mb)

1030
1030
1030
1030
1029
1029
1029
1030
1030
1030
1031
1031
1031
1031
1031
1031
1031
1031
1032
1032
1033
1033
1034
1034

Ozone (du)

353
351
350
350
350
350
350
349
348
348
348
347
347
346
345
343
341
339
338
337
336
335
335
335

Friday 26

Waxing Crescent 50%

11:44

23:29

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

Sun - Rise: 08:22, Set: 16:13, Transit: 12:18. Moon - Rise: 11:44, Set: 23:29. Civil Dark: 16:53 - 07:42. Nautical Dark: 17:36 - 06:59. Astro Dark: 18:17 - 06:18

Total Clouds (% Sky Obscured)

64
62
63
59
56
38
21
3
3
4
15
42
60
70
63
56
47
33
22
11

Low Clouds (% Sky Obscured)

54
52
53
51
48
34
21
3
3
4
15
42
56
65
58
53
47
33
22
11

Medium Clouds (% Sky Obscured)

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
1
1
2
2
3
4
3
4
5
7
4
2
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

Fog (%)

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

Precipitation Probability (%)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

83
83
83
83
83
83
77
72
67
70
74
78
78
76
76
76
76
76
79
83

Pressure (mb)

1035
1035
1035
1035
1036
1036
1036
1036
1036
1036
1037
1037
1037
1037
1038
1037
1037
1037
1037
1037

Ozone (du)

331
327
324
322
320
318
317
315
314
313
312
311
311
310
310
310
310
311
310
309

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

Generated: 20/12/25 22:02:38. Forecast: 20/12/25 to 26/12/25. Timezone: UTC+0.00