Clear Outside v1.0 - International Weather Forecasts For Astronomers

Friday 18

Waning Gibbous 69%

02:42

09:14

19 Bad
20 Bad
21 Bad
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

Sun - Rise: 06:07, Set: 20:15, Transit: 13:12. Moon - Rise: 02:42, Set: 09:14. Civil Dark: 20:51 - 05:31. Nautical Dark: 21:36 - 04:45. Astro Dark: 22:27 - 03:53

Total Clouds (% Sky Obscured)

100
100
100
100
100
99
99
100
100
100
100
100
100
100
100
100
100
96
100
97
100
100
100
89

Low Clouds (% Sky Obscured)

97
99
99
92
88
90
99
91
100
95
97
100
100
100
100
83
79
83
88
69
73
68
55
50

Medium Clouds (% Sky Obscured)

62
97
97
98
97
98
86
100
100
100
100
100
100
58
64
92
65
55
71
65
45
44
44
51

High Clouds (% Sky Obscured)

63
94
100
91
63
53
63
100
65
93
100
40
40
27
31
33
100
75
70
71
100
100
48
45

ISS Passover

Visibility (miles)

1
0
2
1
1
1
3
9
4
3
1
2
6
3
4
3
7
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
Moderate Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Moderate Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
None
None
None
None
None
None
None

Precipitation Probability (%)

95
95
95
95
95
95
95
95
95
95
95
95
93
92
95
95
87
51
32
26
13
1
3
1

Precipitation Amount (mm)

0.8
0.6
2.5
1.8
1.2
0.7
0.7
1.7
0.9
2.3
2.6
1
0.5
0.5
1.3
1.2
0.7
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

15
14
15
14
13
13
13
16
16
17
17
16
16
15
14
15
14
14
13
13
12
13
14
11

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

9
9
9
9
9
9
9
9
9
9
9
9
8
9
8
8
9
9
9
9
10
10
10
9

Relative Humidity (%)

98
98
96
98
96
96
96
95
93
95
96
95
95
96
95
95
95
93
91
88
90
88
86
84

Pressure (mb)

1004
1004
1005
1005
1005
1004
1004
1003
1003
1003
1003
1003
1004
1005
1005
1006
1007
1007
1007
1007
1007
1007
1007
1007

Ozone (du)

383
382
381
381
381
380
380
381
381
378
379
379
379
378
378
377
378
380
380
380
380
378
377
376

Saturday 19

Waning Gibbous 59%

03:22

10:25

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

Sun - Rise: 06:05, Set: 20:17, Transit: 13:11. Moon - Rise: 03:22, Set: 10:25. Civil Dark: 20:53 - 05:28. Nautical Dark: 21:38 - 04:43. Astro Dark: 22:30 - 03:50

Total Clouds (% Sky Obscured)

82
98
100
100
100
94
83
65
56
29
19
23
33
35
53
45
28
34
10
0
5
31
31
71

Low Clouds (% Sky Obscured)

0
14
0
0
13
0
0
0
0
0
6
0
0
0
25
13
0
5
0
0
0
6
0
56

Medium Clouds (% Sky Obscured)

39
45
55
51
53
61
64
65
53
25
8
11
17
21
23
22
24
19
10
0
5
21
17
23

High Clouds (% Sky Obscured)

38
58
97
100
100
8
5
5
10
2
0
1
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
1
3
4
18
26
20
22
29

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
12
12
12
11
10
10
9
8
9
11
9
8
9
11
13
12
11
10
10
8
6
5
4

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

8
7
7
6
5
5
4
4
3
3
2
2
2
3
4
4
5
7
7
8
9
10
10
10

Dew Point (°C)

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

Relative Humidity (%)

83
81
78
81
82
82
84
84
78
76
74
74
78
75
70
69
68
67
66
70
75
80
81
81

Pressure (mb)

1007
1007
1008
1008
1008
1008
1008
1008
1008
1008
1007
1007
1008
1008
1008
1008
1008
1007
1007
1006
1006
1006
1006
1005

Ozone (du)

376
376
377
377
377
378
378
377
376
377
376
375
377
378
379
379
378
378
376
374
373
372
371
369

Sunday 20

Waning Gibbous 48%

03:51

11:45

19 Bad
20 Bad
21 Bad
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

Sun - Rise: 06:03, Set: 20:18, Transit: 13:11. Moon - Rise: 03:51, Set: 11:45. Civil Dark: 20:54 - 05:26. Nautical Dark: 21:40 - 04:40. Astro Dark: 22:33 - 03:47

Total Clouds (% Sky Obscured)

69
94
100
100
100
98
100
95
93
100
98
100
100
100
92
95
88
83
94
67
81
90
56
52

Low Clouds (% Sky Obscured)

39
85
100
100
73
87
100
94
91
89
90
100
76
87
72
90
85
48
53
64
70
72
56
52

Medium Clouds (% Sky Obscured)

38
37
58
62
93
97
94
73
43
99
73
100
100
69
55
50
45
45
37
35
63
75
15
8

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
1
3
15
20
20
15
9
1
42
62
55
66
22
0
0
0
0

ISS Passover

Visibility (miles)

9
9
9
9
9
5
5
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
Light Rain
Light Rain
Light Rain
Very Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Very Light Rain
None
None
None
None
None
None
None
Very Light Rain
None

Precipitation Probability (%)

34
32
29
33
50
62
63
71
57
61
65
72
70
62
46
39
35
29
27
31
35
42
48
27

Precipitation Amount (mm)

0
0
0
0
0.2
0.4
0.4
0.6
0.3
0.4
0.5
0.6
0.7
0.5
0.3
0
0
0
0
0
0
0
0.2
0

Wind Speed/Direction (mph)

3
2
2
1
1
2
2
1
2
3
4
5
6
7
5
6
10
12
13
14
14
14
14
12

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

83
84
87
88
91
95
96
98
95
96
96
96
95
93
93
85
80
73
70
67
67
64
66
72

Pressure (mb)

1005
1005
1006
1006
1006
1006
1006
1006
1006
1006
1006
1006
1006
1007
1007
1008
1008
1008
1009
1009
1009
1010
1010
1011

Ozone (du)

366
363
364
365
365
366
367
368
367
367
367
365
364
366
369
372
374
377
379
381
384
386
387
389

Monday 21

Third Quarter 37%

04:13

13:09

19 Bad
20 Bad
21 OK
22 OK
23 Bad
00 Bad
01 OK
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

Sun - Rise: 06:00, Set: 20:20, Transit: 13:11. Moon - Rise: 04:13, Set: 13:09. Civil Dark: 20:56 - 05:24. Nautical Dark: 21:42 - 04:38. Astro Dark: 22:35 - 03:44

Total Clouds (% Sky Obscured)

46
40
35
25
52
40
41
43
49
59
69
78
80
84
86
88
90
91
93
95
97
91
97
98

Low Clouds (% Sky Obscured)

46
39
27
18
9
1
2
4
8
33
46
59
53
49
41
57
71
83
79
75
70
75
80
86

Medium Clouds (% Sky Obscured)

17
24
28
22
41
35
36
31
32
43
45
52
45
50
74
67
59
60
72
84
96
52
48
54

High Clouds (% Sky Obscured)

0
0
0
0
0
1
1
30
35
45
40
31
5
32
30
6
20
20
14
28
41
27
70
81

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
7
9
9
5
2
5
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
Light Rain
Light Rain
None
None
None
None

Precipitation Probability (%)

31
25
4
3
1
0
0
1
12
21
9
16
3
12
13
26
33
42
65
64
41
27
23
24

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.5
0.5
0
0
0
0

Wind Speed/Direction (mph)

11
9
7
7
7
6
5
5
5
5
4
5
5
6
7
9
9
6
5
5
6
9
9
9

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

80
87
93
91
93
93
94
94
94
94
93
91
90
87
85
80
84
88
88
93
96
92
88
88

Pressure (mb)

1011
1012
1013
1014
1014
1014
1014
1014
1015
1015
1015
1015
1016
1016
1016
1016
1017
1017
1017
1016
1016
1016
1016
1016

Ozone (du)

384
381
382
383
380
379
379
381
384
386
387
386
386
386
386
387
387
388
387
385
386
383
378
376

Tuesday 22

Waning Crescent 26%

04:29

14:35

19 Bad
20 Bad
21 Bad
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

Sun - Rise: 05:58, Set: 20:22, Transit: 13:11. Moon - Rise: 04:29, Set: 14:35. Civil Dark: 20:58 - 05:22. Nautical Dark: 21:44 - 04:35. Astro Dark: 22:38 - 03:40

Total Clouds (% Sky Obscured)

98
99
100
98
96
95
96
98
100
98
95
93
91
86
80
77
74
71
68
63
69
70
64
53

Low Clouds (% Sky Obscured)

90
95
100
89
78
66
57
47
37
34
31
28
85
72
62
62
65
65
62
59
56
47
39
30

Medium Clouds (% Sky Obscured)

62
98
99
95
90
84
90
95
100
97
95
84
67
51
35
36
39
40
26
12
2
1
1
0

High Clouds (% Sky Obscured)

63
47
25
15
10
10
33
60
90
57
28
0
13
25
38
28
16
6
8
11
19
14
7
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
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

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

Precipitation Probability (%)

47
66
80
78
62
33
22
12
1
3
9
7
29
33
34
31
25
16
27
30
31
33
32
29

Precipitation Amount (mm)

0
0.3
0.5
0.5
0.4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

11
10
9
9
9
9
9
9
9
8
8
8
8
10
11
11
12
12
13
13
13
14
13
13

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

91
96
96
98
96
96
96
96
96
95
95
95
93
93
91
91
89
86
83
80
76
74
77
79

Pressure (mb)

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

Ozone (du)

375
376
374
373
372
373
373
372
374
378
375
376
380
381
383
385
385
385
385
383
382
380
379
379

Wednesday 23

Waning Crescent 17%

04:43

16:02

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

Sun - Rise: 05:56, Set: 20:23, Transit: 13:11. Moon - Rise: 04:43, Set: 16:02. Civil Dark: 21:00 - 05:20. Nautical Dark: 21:46 - 04:33. Astro Dark: 22:41 - 03:37

Total Clouds (% Sky Obscured)

45
34
24
26
26
24
47
70
93
96
98
99
97
96
97
89
81
71
80
88
96
94
90
85

Low Clouds (% Sky Obscured)

32
34
24
26
26
24
42
51
59
59
57
58
67
76
85
80
74
68
63
59
54
49
43
38

Medium Clouds (% Sky Obscured)

1
2
4
4
4
4
24
41
70
79
83
88
87
86
86
58
30
2
3
3
4
13
23
32

High Clouds (% Sky Obscured)

0
0
0
5
9
15
10
5
5
10
13
9
6
3
0
0
0
0
27
53
80
54
27
3

ISS Passover

Visibility (miles)

8
8
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 (%)

25
19
10
11
9
1
2
1
0
0
0
0
5
8
9
13
16
19
22
24
27
26
25
23

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

83
86
88
91
91
93
93
93
93
93
93
93
91
87
82
78
76
73
70
70
69
68
71
73

Pressure (mb)

1019
1020
1020
1021
1021
1021
1022
1022
1022
1022
1022
1022
1022
1023
1023
1023
1023
1023
1023
1022
1022
1022
1022
1022

Ozone (du)

378
380
381
383
383
383
383
382
381
381
381
382
383
384
385
386
382
379
376
374
372
371
368
365

Thursday 24

Waning Crescent 9%

04:56

17:30

19 Bad
20 Bad
21 Bad
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

Sun - Rise: 05:54, Set: 20:25, Transit: 13:10. Moon - Rise: 04:56, Set: 17:30. Civil Dark: 21:02 - 05:17. Nautical Dark: 21:49 - 04:30. Astro Dark: 22:44 - 03:34

Total Clouds (% Sky Obscured)

87
90
93
85
80
73
75
75
74
83
90
100
100
100
100
99
99
98

Low Clouds (% Sky Obscured)

52
64
77
67
56
46
36
28
23
37
50
60
62
61
59
60
63
69

Medium Clouds (% Sky Obscured)

31
30
33
32
31
30
35
37
35
37
38
45
45
45
45
36
27
27

High Clouds (% Sky Obscured)

4
6
6
3
2
1
8
17
25
18
10
6
37
70
98
94
92
89

ISS Passover

Visibility (miles)

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

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

22
19
10
12
10
3
5
4
2
5
7
10
13
14
14
18
21
24

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

77
78
81
82
85
87
90
85
84
81
82
82
82
80
78
74
69
65

Pressure (mb)

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

Ozone (du)

363
362
361
360
360
359
358
357
356
355
355
356
357
357
357
357
356
355

Forecast for Barry, Vale of Glamorgan, United Kingdom (51.40,-3.28)

Generated: 18/04/25 19:55:14. Forecast: 18/04/25 to 24/04/25. Timezone: UTC+1.00