Clear Outside v1.0 - International Weather Forecasts For Astronomers

Thursday 18

Waning Crescent 12%

02:31

18:24

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: 06:54, Set: 19:19, Transit: 13:06. Moon - Rise: 02:31, Set: 18:24. Civil Dark: 19:53 - 06:20. Nautical Dark: 20:32 - 05:41. Astro Dark: 21:14 - 04:59

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
96
92
96
96
93
85
87
76
78
73
85
81
86
89
74
85

Low Clouds (% Sky Obscured)

100
100
100
100
100
100
96
95
92
84
94
81
67
67
76
67
64
59
75
67
71
79
66
80

Medium Clouds (% Sky Obscured)

53
49
53
57
49
35
30
50
35
33
36
32
37
22
0
0
2
2
0
28
17
13
0
5

High Clouds (% Sky Obscured)

39
37
34
37
87
62
64
92
30
15
67
82
56
61
75
70
71
73
76
32
57
67
62
60

ISS Passover

Visibility (miles)

0
0
0
0
0
0
0
3
8
9
9
9
9
8
9
9
9
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
1
4
1
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
33
27
38
28
34
46
35
25
19
17
17
29
21
23
10
8
17
15
9
8
5
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

17
17
16
17
17
17
17
17
17
16
17
17
17
17
17
17
16
17
16
16
16
16
16
16

Relative Humidity (%)

98
98
96
98
98
98
98
98
96
93
93
93
91
84
79
77
79
82
84
89
93
95
96
96

Pressure (mb)

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

Ozone (du)

267
268
267
266
266
265
263
264
263
263
263
263
263
263
263
260
259
258
257
256
257
257
257
257

Friday 19

Waning Crescent 6%

03:52

18:38

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: 06:55, Set: 19:17, Transit: 13:06. Moon - Rise: 03:52, Set: 18:38. Civil Dark: 19:50 - 06:22. Nautical Dark: 20:30 - 05:42. Astro Dark: 21:11 - 05:01

Total Clouds (% Sky Obscured)

80
80
83
79
83
79
82
72
75
79
66
59
78
94
96
96
94
93
100
100
100
100
85
93

Low Clouds (% Sky Obscured)

74
76
63
75
78
79
81
69
67
63
55
59
56
57
45
43
23
13
53
64
48
56
59
68

Medium Clouds (% Sky Obscured)

3
4
3
2
2
2
2
2
2
3
3
2
3
3
2
2
2
28
40
51
20
2
15
7

High Clouds (% Sky Obscured)

22
21
50
11
7
19
9
27
33
44
39
1
46
88
96
96
88
78
90
96
100
100
53
72

ISS Passover

Visibility (miles)

9
9
9
8
8
8
8
8
8
8
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
1
0
0
0
1
3
0
0
1
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)

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

Chance of Frost

Temperature (°C)

16
16
16
15
15
15
15
15
15
16
17
18
19
20
20
21
20
20
19
18
17
16
15
15

Feels Like (°C)

15
15
15
15
15
15
15
15
15
16
17
18
19
19
20
20
21
21
21
19
18
16
15
16

Dew Point (°C)

15
15
15
15
15
14
14
14
14
15
15
15
15
14
14
14
14
15
15
15
15
14
14
14

Relative Humidity (%)

96
96
96
96
96
96
95
95
95
92
88
82
76
71
68
65
66
70
77
83
89
89
92
92

Pressure (mb)

1019
1019
1019
1018
1018
1018
1018
1018
1018
1017
1017
1017
1017
1017
1017
1016
1015
1015
1015
1015
1015
1015
1015
1014

Ozone (du)

258
259
260
261
261
262
262
262
261
261
261
261
262
262
262
262
261
262
263
266
266
266
267
267

Saturday 20

Waning Crescent 2%

05:10

18:50

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: 06:57, Set: 19:15, Transit: 13:06. Moon - Rise: 05:10, Set: 18:50. Civil Dark: 19:48 - 06:24. Nautical Dark: 20:27 - 05:44. Astro Dark: 21:09 - 05:03

Total Clouds (% Sky Obscured)

94
100
58
82
100
100
100
93
99
100
100
100
100
89
89
96
75
93
79
61
58
83
87
52

Low Clouds (% Sky Obscured)

68
69
54
75
74
63
62
65
82
92
74
58
61
64
67
92
61
86
70
61
58
74
68
52

Medium Clouds (% Sky Obscured)

17
17
6
0
16
23
52
52
56
32
48
48
84
45
38
73
38
76
8
12
10
15
17
22

High Clouds (% Sky Obscured)

75
100
38
59
100
98
100
67
93
98
100
100
100
77
56
2
7
2
37
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
15
0
70
60
0
1
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
Light Rain
Light Rain
Light Rain
None
None
None
None
Very Light Rain
None
None
None
None
None
None

Precipitation Probability (%)

0
0
0
0
0
0
0
0
3
16
90
95
95
40
44
37
50
46
32
17
12
10
23
20

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0.9
1.4
1.1
0
0
0
0
0.3
0
0
0
0
0
0

Wind Speed/Direction (mph)

4
3
3
2
2
2
1
2
2
3
4
5
6
6
7
9
11
12
8
9
10
12
13
14

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

16
14
13
14
14
13
13
13
14
15
15
16
17
17
20
20
17
16
16
15
15
14
12
12

Dew Point (°C)

13
13
13
12
12
12
12
12
12
12
12
12
12
12
13
13
14
14
14
13
13
13
13
12

Relative Humidity (%)

92
92
92
92
92
92
92
93
90
84
80
75
73
70
67
64
72
78
82
82
86
90
90
79

Pressure (mb)

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

Ozone (du)

267
268
267
268
268
268
268
269
269
270
270
270
270
272
273
272
271
273
274
278
282
285
285
287

Sunday 21

New Moon 0%

06:25

19:00

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 OK
21 Good
22 Good
23 OK

Sun - Rise: 06:58, Set: 19:12, Transit: 13:05. Moon - Rise: 06:25, Set: 19:00. Civil Dark: 19:46 - 06:25. Nautical Dark: 20:25 - 05:46. Astro Dark: 21:06 - 05:05

Total Clouds (% Sky Obscured)

65
66
92
73
96
97
76
89
80
73
72
71
69
71
76
78
75
73
71
60
38
0
3
27

Low Clouds (% Sky Obscured)

53
50
60
47
54
49
33
43
45
48
49
51
53
45
40
35
36
38
36
26
15
0
0
0

Medium Clouds (% Sky Obscured)

27
39
46
50
56
62
59
46
36
22
12
6
0
7
15
22
16
12
6
4
2
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)

6
9
9
9
9
5
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 (%)

27
30
31
33
43
34
14
8
14
5
14
12
2
1
3
0
5
7
1
4
6
0
3
10

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

12
12
11
10
10
8
6
6
6
7
7
7
8
8
9
9
10
10
10
9
9
8
9
8

Dew Point (°C)

12
12
11
11
11
11
9
9
9
9
9
9
8
8
7
7
6
6
6
6
6
6
6
6

Relative Humidity (%)

90
92
92
87
93
93
87
85
83
80
81
77
74
70
63
62
60
60
61
63
66
74
81
84

Pressure (mb)

1006
1006
1005
1005
1005
1006
1007
1008
1009
1010
1011
1012
1012
1013
1013
1013
1013
1013
1014
1014
1015
1015
1016
1017

Ozone (du)

287
289
290
291
292
297
299
301
304
306
310
312
313
312
312
312
312
312
311
310
312
313
315
316

Monday 22

Waxing Crescent 1%

07:38

19:10

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

Sun - Rise: 07:00, Set: 19:10, Transit: 13:05. Moon - Rise: 07:38, Set: 19:10. Civil Dark: 19:43 - 06:27. Nautical Dark: 20:23 - 05:48. Astro Dark: 21:03 - 05:07

Total Clouds (% Sky Obscured)

30
30
35
30
25
25
25
9
0
0
5
13
16
27
39
51
61
69
78
81
81
78
76
77

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
5
10
15
21
28
36
38
40
42
43
44
45
53
59

Medium Clouds (% Sky Obscured)

0
0
0
0
1
5
10
2
0
0
1
13
8
6
4
2
1
1
0
0
0
0
0
0

High Clouds (% Sky Obscured)

0
0
7
24
15
10
10
1
0
0
1
1
2
2
2
2
2
1
0
0
0
0
3
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
None
None
None
None
None

Precipitation Probability (%)

3
2
10
6
12
5
13
4
3
1
3
5
7
17
19
19
18
16
10
10
7
2
4
3

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
7
7
7
8
8
8
7
7
9
12
14
14
14
14
14
14
12
10
9
8
9
8
9

Chance of Frost

Temperature (°C)

10
10
10
9
9
9
9
9
10
11
12
13
14
15
14
14
14
13
12
12
11
10
10
10

Feels Like (°C)

7
7
7
6
6
5
5
6
7
8
8
9
9
11
10
10
10
10
10
9
6
5
5
5

Dew Point (°C)

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

Relative Humidity (%)

78
76
76
76
76
76
75
80
80
80
77
72
70
67
69
71
75
75
73
72
72
71
69
68

Pressure (mb)

1017
1017
1017
1018
1018
1018
1019
1019
1020
1020
1021
1021
1021
1021
1021
1021
1021
1021
1022
1022
1022
1023
1023
1023

Ozone (du)

317
318
317
317
317
317
317
316
317
317
316
316
316
316
316
316
317
317
317
317
316
314
313
313

Tuesday 23

Waxing Crescent 3%

08:51

19:20

00 Bad
01 Bad
02 Bad
03 Bad
04 OK
05 OK
06 Good
07 Good
08 Good
09 Good
10 OK
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: 07:02, Set: 19:08, Transit: 13:05. Moon - Rise: 08:51, Set: 19:20. Civil Dark: 19:41 - 06:29. Nautical Dark: 20:20 - 05:49. Astro Dark: 21:01 - 05:09

Total Clouds (% Sky Obscured)

81
73
66
59
45
26
9
9
15
18
44
71
92
90
91
92
91
88
86
83
81
82
84
88

Low Clouds (% Sky Obscured)

64
58
54
50
42
26
9
9
15
16
24
29
31
26
27
31
28
25
22
22
22
22
23
25

Medium Clouds (% Sky Obscured)

0
2
7
8
8
7
7
9
11
12
18
19
20
24
29
27
26
26
25
19
20
22
26
27

High Clouds (% Sky Obscured)

10
7
3
0
0
0
0
0
0
0
0
0
0
0
1
3
6
9
14
17
20
24
19
14

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
2
2
2
9
13
12
22
22
16
15
12
2
7
6

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

67
66
70
73
75
76
76
78
70
64
59
60
63
63
63
63
64
63
62
61
62
64
64
69

Pressure (mb)

1023
1023
1023
1023
1023
1023
1023
1023
1023
1023
1023
1023
1023
1023
1022
1022
1022
1022
1022
1022
1022
1022
1022
1022

Ozone (du)

312
311
311
310
310
310
311
311
311
311
311
310
310
309
309
309
309
308
308
307
306
305
305
304

Wednesday 24

Waxing Crescent 7%

10:03

19:33

Sun - Rise: 07:03, Set: 19:06, Transit: 13:04. Moon - Rise: 10:03, Set: 19:33. Civil Dark: 19:39 - 06:30. Nautical Dark: 20:18 - 05:51. Astro Dark: 20:58 - 05:11

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: 18/09/25 00:07:35. Forecast: 18/09/25 to 24/09/25. Timezone: UTC+1.00