Clear Outside v1.0 - International Weather Forecasts For Astronomers

Friday 5

Waning Gibbous 98%

16:00

09:18

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
02 Bad
03 Bad
04 Bad

Sun - Rise: 08:06, Set: 16:08, Transit: 12:07. Moon - Rise: 16:00, Set: 09:18. Civil Dark: 16:47 - 07:27. Nautical Dark: 17:30 - 06:44. Astro Dark: 18:11 - 06:03

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
96
93
100
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

59
48
17
52
68
100
100
100
100
93
83
80
64
54
60
71
63
63
73
81
72
62
73
68

Medium Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
76
61
52
55
52
100
93
100
100
100
100
100
100
100
100
44

High Clouds (% Sky Obscured)

100
100
100
37
64
91
94
58
8
4
35
30
6
5
25
25
20
100
100
97
100
100
100
80

ISS Passover

Visibility (miles)

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

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
None
None
None
None
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain

Precipitation Probability (%)

44
6
17
21
56
95
95
95
95
95
95
95
95
95
95
95
95
95
95
95
95
95
87
86

Precipitation Amount (mm)

0.4
0
0
0
0
0.8
0.9
1.4
1.2
1.7
1.7
1.2
1.3
0.9
1
0.9
1.1
0.7
0.8
1.1
1.1
1
0.6
0.6

Wind Speed/Direction (mph)

8
9
11
14
16
19
23
25
28
31
32
25
25
26
28
30
28
27
26
25
30
31
30
29

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

84
84
82
84
82
81
84
88
88
90
88
85
85
84
87
84
81
81
84
91
85
88
85
84

Pressure (mb)

1003
1003
1003
1002
1002
1001
999
997
995
992
990
989
989
989
989
989
989
989
988
988
988
988
989
989

Ozone (du)

318
316
313
307
302
296
292
289
290
290
294
298
297
295
299
300
299
298
292
290
291
289
286
285

Saturday 6

Waning Gibbous 93%

17:13

10:25

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 OK
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad

Sun - Rise: 08:07, Set: 16:08, Transit: 12:08. Moon - Rise: 17:13, Set: 10:25. Civil Dark: 16:47 - 07:28. Nautical Dark: 17:30 - 06:45. Astro Dark: 18:11 - 06:04

Total Clouds (% Sky Obscured)

100
99
100
100
100
83
94
82
86
87
97
65
92
76
14
44
69
100
100
100
99
100
100
86

Low Clouds (% Sky Obscured)

76
82
83
86
75
74
74
70
74
69
68
50
50
36
0
38
33
20
43
37
79
63
35
37

Medium Clouds (% Sky Obscured)

100
50
100
91
93
78
91
78
73
77
45
14
18
12
0
2
0
0
25
52
89
89
77
80

High Clouds (% Sky Obscured)

80
86
100
100
100
20
30
5
0
6
18
35
65
57
12
19
43
100
100
100
77
95
100
60

ISS Passover

Visibility (miles)

8
6
5
7
6
7
7
8
7
6
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
Light Rain
Light Rain
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 (%)

89
95
95
95
95
90
90
78
77
61
55
45
32
30
31
15
2
1
0
2
6
16
20
20

Precipitation Amount (mm)

0.6
1
0.8
0.7
0.7
0.6
0.6
0.4
0.4
0.2
0.3
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

28
27
28
29
27
29
28
28
26
26
26
24
24
20
18
18
16
15
13
10
8
7
7
7

Chance of Frost

Temperature (°C)

11
11
11
11
11
11
11
11
11
11
11
10
10
10
10
10
9
9
10
9
9
9
10
10

Feels Like (°C)

3
3
3
3
3
3
3
3
3
3
2
3
3
4
4
4
5
4
5
5
6
7
8
8

Dew Point (°C)

8
9
9
9
9
8
8
8
8
8
8
8
8
8
8
8
7
7
7
7
7
8
9
9

Relative Humidity (%)

84
87
88
85
85
85
84
84
84
84
85
84
84
85
87
85
85
85
85
87
88
91
95
95

Pressure (mb)

990
990
990
991
992
993
994
995
996
997
997
998
999
1000
1001
1002
1002
1002
1002
1002
1002
1002
1002
1001

Ozone (du)

283
284
281
282
285
286
286
289
290
293
294
295
298
297
294
294
293
292
287
285
285
286
286
286

Sunday 7

Waning Gibbous 86%

18:39

11:11

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
02 Bad
03 Bad
04 Bad

Sun - Rise: 08:09, Set: 16:07, Transit: 12:08. Moon - Rise: 18:39, Set: 11:11. Civil Dark: 16:47 - 07:29. Nautical Dark: 17:30 - 06:46. Astro Dark: 18:10 - 06:05

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
100
97
89
55
61
61
61
95
98
100
96
92

Low Clouds (% Sky Obscured)

100
89
81
100
98
93
100
100
93
68
72
76
83
51
36
43
51
48
49
47
48
48
52
56

Medium Clouds (% Sky Obscured)

80
96
99
100
94
100
100
99
100
100
100
30
97
70
40
48
51
44
40
45
52
50
88
78

High Clouds (% Sky Obscured)

100
100
100
100
100
100
100
89
100
100
100
56
55
0
0
2
55
3
3
29
25
20
16
23

ISS Passover

Visibility (miles)

9
9
7
4
2
1
1
2
2
3
6
9
9
9
9
9
9
9
9
9
9
9
6
4

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
23
23
23
23
23
23
23
23
23
23
23

Precipitation Type

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

Precipitation Probability (%)

46
55
79
95
95
95
95
95
95
55
27
4
6
15
29
9
31
33
16
35
54
69
79
83

Precipitation Amount (mm)

0
0
0.5
1.1
1.8
1.6
1.7
1.1
0.7
0
0
0
0
0
0
0
0
0
0
0
0.2
0.5
0.5
0.6

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

96
95
93
95
95
98
98
98
98
96
98
96
87
90
88
87
90
90
91
91
93
93
93
93

Pressure (mb)

1000
1000
999
998
997
997
996
995
995
995
995
995
997
998
1000
1001
1001
1002
1002
1003
1003
1003
1003
1003

Ozone (du)

284
286
290
293
293
294
296
294
295
299
302
305
309
315
317
317
313
311
308
307
309
316
322
329

Monday 8

Waning Gibbous 77%

20:08

11:41

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
02 Bad
03 Bad
04 Bad

Sun - Rise: 08:10, Set: 16:07, Transit: 12:08. Moon - Rise: 20:08, Set: 11:41. Civil Dark: 16:47 - 07:30. Nautical Dark: 17:30 - 06:47. Astro Dark: 18:10 - 06:06

Total Clouds (% Sky Obscured)

90
91
95
97
98
99
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

62
56
56
50
49
47
44
74
76
76
70
63
54
51
56
77
70
64
58
69
80
91
90
91

Medium Clouds (% Sky Obscured)

70
27
41
45
85
83
100
100
100
100
55
93
50
98
99
100
100
100
100
100
46
100
100
100

High Clouds (% Sky Obscured)

24
36
56
76
85
93
100
100
100
100
99
99
98
99
100
100
100
100
100
100
100
100
100
100

ISS Passover

Visibility (miles)

6
6
4
7
9
9
9
7
7
7
9
9
9
9
9
9
5
7
9
7
5
9
6
9

Fog (%)

23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23

Precipitation Type

Light Rain
Light Rain
Light Rain
Light Rain
Very Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Very Light Rain
Very Light Rain
Light Rain
Very Light Rain
Very Light Rain
Very Light Rain
Light Rain
Light Rain
Light Rain
Moderate Rain
Moderate Rain

Precipitation Probability (%)

76
80
78
68
58
65
69
86
94
95
95
90
86
64
56
73
67
65
67
95
95
95
95
95

Precipitation Amount (mm)

0.5
0.6
0.6
0.4
0.3
0.4
0.5
0.7
0.8
1
0.8
0.7
0.7
0.3
0.3
0.5
0.3
0.2
0.2
0.9
1.6
2.2
2.6
2.9

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

11
11
11
11
11
11
12
12
12
12
11
11
11
11
11
11
11
11
12
12
12
12
12
12

Feels Like (°C)

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

Dew Point (°C)

10
10
9
9
10
10
10
10
11
10
10
10
10
10
10
10
10
11
11
11
11
12
12
12

Relative Humidity (%)

91
90
88
88
91
90
88
90
93
87
90
91
93
93
93
93
95
95
95
95
96
96
98
98

Pressure (mb)

1004
1004
1004
1005
1006
1006
1006
1007
1007
1007
1006
1007
1007
1007
1006
1006
1006
1005
1004
1003
1002
1001
1000
999

Ozone (du)

331
337
340
343
346
348
347
348
347
344
341
337
336
333
330
323
319
316
310
305
303
300
300
298

Tuesday 9

Waning Gibbous 67%

21:33

12:01

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
02 Bad
03 Bad
04 Bad

Sun - Rise: 08:11, Set: 16:07, Transit: 12:09. Moon - Rise: 21:33, Set: 12:01. Civil Dark: 16:47 - 07:31. Nautical Dark: 17:30 - 06:48. Astro Dark: 18:10 - 06:07

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
99
98
98
98
95
92
90
90
89
91
95
98
99
100

Low Clouds (% Sky Obscured)

91
91
91
92
94
97
100
93
84
78
75
73
70
89
79
70
72
73
75
76
77
77
80
83

Medium Clouds (% Sky Obscured)

100
100
100
100
97
94
92
88
86
85
87
91
94
97
95
92
90
83
79
76
70
77
85
89

High Clouds (% Sky Obscured)

100
100
100
100
100
100
100
99
98
97
68
46
29
59
41
18
16
15
18
24
32
40
40
30

ISS Passover

Visibility (miles)

2
1
1
3
5
3
2
4
3
3
3
4
7
9
8
7
5
5
4
4
6
7
9
7

Fog (%)

23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23

Precipitation Type

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

Precipitation Probability (%)

95
95
95
95
95
95
95
95
95
86
73
41
44
59
59
59
79
89
95
95
95
91
82
78

Precipitation Amount (mm)

3.3
3.5
2.5
1.7
1.2
1.2
1.1
0.6
0.9
0.6
0.4
0
0
0
0
0
0.4
0.5
0.8
0.9
0.7
0.5
0.5
0.4

Wind Speed/Direction (mph)

18
21
22
24
24
24
25
25
27
26
28
27
25
24
24
24
24
23
23
22
20
16
13
10

Chance of Frost

Temperature (°C)

13
13
13
13
13
13
13
13
13
13
13
13
13
12
13
12
12
12
12
12
12
12
12
11

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

98
96
98
98
96
98
98
98
96
96
96
95
93
92
93
95
95
95
96
95
95
92
90
92

Pressure (mb)

997
996
996
996
996
995
995
995
995
995
995
996
996
997
994
996
997
998
999
999
1000
1000
1000
1000

Ozone (du)

294
293
292
290
290
288
286
285
284
283
282
283
284
281
282
283
284
284
285
285
286
287
288
290

Wednesday 10

Waning Gibbous 67%

22:53

12:16

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 OK
21 OK
22 Bad
23 OK
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad

Sun - Rise: 08:12, Set: 16:07, Transit: 12:09. Moon - Rise: 22:53, Set: 12:16. Civil Dark: 16:47 - 07:32. Nautical Dark: 17:30 - 06:49. Astro Dark: 18:10 - 06:08

Total Clouds (% Sky Obscured)

100
100
99
97
88
80
75
67
59
46
37
23
19
25
30
38
34
30
25
30
35
39
35
39

Low Clouds (% Sky Obscured)

87
84
82
79
70
61
55
58
57
46
37
23
19
24
20
20
20
24
24
29
31
36
31
23

Medium Clouds (% Sky Obscured)

95
91
85
76
65
59
53
54
52
46
24
10
0
8
16
22
17
13
8
8
8
8
5
3

High Clouds (% Sky Obscured)

20
8
3
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
14
24
32
32
39

ISS Passover

Visibility (miles)

6
4
6
7
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23
23

Precipitation Type

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

Precipitation Probability (%)

89
95
95
95
95
65
53
49
56
63
57
62
62
49
31
3
10
9
4
14
13
8
11
12

Precipitation Amount (mm)

0.5
1
1.3
1.3
0.7
0.3
0.3
0.2
0.3
0.4
0.3
0.4
0.3
0.2
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

11
11
10
9
9
9
10
11
10
10
10
10
10
9
9
9
9
9
9
9
9
10
10
10

Feels Like (°C)

6
6
7
8
8
8
8
7
7
7
6
6
6
6
6
6
6
7
7
7
6
7
7
7

Dew Point (°C)

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

Relative Humidity (%)

95
96
91
87
84
84
82
81
81
80
78
80
82
85
85
85
87
88
91
93
93
93
93
93

Pressure (mb)

1000
1000
1001
1003
1005
1006
1007
1008
1008
1009
1010
1011
1011
1012
1013
1013
1014
1014
1014
1014
1014
1014
1014
1013

Ozone (du)

292
294
299
303
308
314
321
327
325
322
319
317
315
314
313
311
310
310
310
310
309
308
307
306

Thursday 11

Third Quarter 57%

00:09

12:28

Sun - Rise: 08:13, Set: 16:07, Transit: 12:10. Moon - Rise: 00:09, Set: 12:28. Civil Dark: 16:47 - 07:33. Nautical Dark: 17:30 - 06:50. Astro Dark: 18:10 - 06:09

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: 05/12/25 05:08:07. Forecast: 05/12/25 to 11/12/25. Timezone: UTC+0.00