Clear Outside v1.0 - International Weather Forecasts For Astronomers

Tuesday 30

Waxing Gibbous 82%

12:24

04:04

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 OK
17 OK
18 OK
19 OK
20 OK
21 OK
22 Good
23 Good
00 Good
01 Good
02 OK

Sun - Rise: 08:46, Set: 16:07, Transit: 12:26. Moon - Rise: 12:24, Set: 04:04. Civil Dark: 16:51 - 08:01. Nautical Dark: 17:38 - 07:15. Astro Dark: 18:21 - 06:31

Total Clouds (% Sky Obscured)

88
77
72
76
69
64
54
65
67
74
76
72
57
25
25
33
38
29
24
8
4
2
6
16

Low Clouds (% Sky Obscured)

43
58
69
73
69
64
27
26
29
32
35
34
32
19
7
5
2
2
2
1
0
0
0
0

Medium 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

High Clouds (% Sky Obscured)

35
37
49
40
9
14
50
61
66
65
66
50
38
4
24
33
38
29
24
8
4
2
6
16

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
1
2
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

82
82
80
77
76
76
77
83
80
78
76
78
82
86
88
89
88
88
86
86
86
87
87
89

Pressure (mb)

1036
1036
1036
1037
1037
1038
1038
1039
1039
1039
1038
1038
1038
1038
1038
1038
1038
1038
1038
1037
1037
1037
1036
1036

Ozone (du)

275
284
293
297
298
297
299
297
297
297
295
296
295
295
295
295
294
292
294
298
299
300
302
302

Wednesday 31

Waxing Gibbous 91%

12:46

05:43

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

Sun - Rise: 08:45, Set: 16:08, Transit: 12:27. Moon - Rise: 12:46, Set: 05:43. Civil Dark: 16:52 - 08:01. Nautical Dark: 17:39 - 07:15. Astro Dark: 18:22 - 06:31

Total Clouds (% Sky Obscured)

25
25
19
16
24
43
27
19
7
12
33
29
25
42
58
44
43
75
77
89
93
62
81
61

Low Clouds (% Sky Obscured)

0
0
2
2
1
21
15
14
1
5
31
26
24
40
55
44
43
75
77
89
93
62
74
47

Medium 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
15
11

High Clouds (% Sky Obscured)

25
25
19
16
24
28
13
5
4
6
5
3
3
5
3
2
2
3
24
32
12
3
32
45

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
2
44
37
0
0
1
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
1
3
5
11
3
9
14

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)

3
3
4
4
4
4
5
5
5
7
7
8
8
7
8
9
10
10
12
13
14
16
16
15

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

91
92
92
94
92
94
92
89
84
80
78
80
84
89
93
93
86
83
81
83
86
86
89
86

Pressure (mb)

1036
1035
1034
1034
1033
1033
1033
1032
1031
1031
1030
1029
1028
1027
1026
1026
1024
1023
1022
1021
1020
1018
1017
1016

Ozone (du)

301
301
301
303
302
302
302
303
302
302
303
302
300
298
297
300
301
301
297
289
286
288
291
296

Thursday 1

Waxing Gibbous 97%

13:23

07:18

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
00 Bad
01 Bad
02 Bad

Sun - Rise: 08:45, Set: 16:09, Transit: 12:27. Moon - Rise: 13:23, Set: 07:18. Civil Dark: 16:53 - 08:01. Nautical Dark: 17:40 - 07:14. Astro Dark: 18:23 - 06:31

Total Clouds (% Sky Obscured)

94
96
99
59
52
74
92
68
45
53
75
74
61
65
58
53
66
69
66
74
75
77
90
96

Low Clouds (% Sky Obscured)

91
69
61
55
45
57
55
58
42
53
68
70
49
47
41
43
50
44
48
50
41
41
41
41

Medium Clouds (% Sky Obscured)

23
16
0
0
0
0
0
0
0
0
2
3
12
27
20
8
17
22
18
26
31
63
85
92

High Clouds (% Sky Obscured)

48
61
92
12
36
71
73
64
8
26
11
17
33
34
35
35
42
35
30
35
40
4
19
12

ISS Passover

Visibility (miles)

9
9
8
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 (%)

33
36
30
8
5
5
8
1
3
3
9
14
20
13
8
9
9
10
9
7
7
14
17
12

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
15
14
13
12
12
13
13
14
14
14
16
15
14
12
13
12
12
11
11
10
10
10
10

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

85
88
91
80
71
71
75
76
76
73
74
79
83
88
82
85
89
91
91
91
93
91
91
93

Pressure (mb)

1015
1014
1014
1013
1014
1014
1014
1014
1014
1013
1013
1013
1013
1013
1013
1013
1013
1013
1013
1013
1012
1012
1012
1011

Ozone (du)

303
308
306
307
313
330
358
370
372
372
373
373
370
370
368
363
357
356
356
350
343
343
338
335

Friday 2

Waxing Gibbous 100%

14:24

08:37

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

Sun - Rise: 08:45, Set: 16:10, Transit: 12:27. Moon - Rise: 14:24, Set: 08:37. Civil Dark: 16:54 - 08:01. Nautical Dark: 17:41 - 07:14. Astro Dark: 18:24 - 06:31

Total Clouds (% Sky Obscured)

87
93
77
85
97
100
57
47
49
40
47
24
35
48
56
54
53
80
63
43
25
35
40
32

Low Clouds (% Sky Obscured)

42
42
41
58
78
95
57
47
40
36
44
23
31
39
46
35
27
24
18
24
2
5
5
1

Medium Clouds (% Sky Obscured)

76
84
65
68
79
100
55
31
7
5
3
0
3
7
9
19
26
80
63
43
25
35
40
32

High 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

ISS Passover

Visibility (miles)

9
9
9
9
9
2
8
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
Very Light Rain
Light Rain
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

19
18
14
29
61
70
39
31
20
24
15
8
13
15
19
18
26
17
26
24
28
26
31
32

Precipitation Amount (mm)

0
0
0
0
0.2
0.5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

93
89
88
88
89
93
86
80
76
73
72
68
68
74
78
77
80
81
78
80
78
83
78
74

Pressure (mb)

1011
1010
1009
1008
1008
1007
1008
1009
1009
1009
1009
1009
1009
1009
1010
1010
1010
1010
1010
1010
1010
1010
1010
1010

Ozone (du)

331
327
328
325
333
335
336
336
334
323
314
311
308
310
322
328
335
338
344
350
359
367
376
382

Saturday 3

Full Moon 99%

15:48

09:31

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

Sun - Rise: 08:45, Set: 16:11, Transit: 12:28. Moon - Rise: 15:48, Set: 09:31. Civil Dark: 16:55 - 08:01. Nautical Dark: 17:42 - 07:14. Astro Dark: 18:25 - 06:31

Total Clouds (% Sky Obscured)

44
51
28
20
15
17
17
35
37
25
11
11
11
15
42
41
31
15
22
30
37
50
66
82

Low Clouds (% Sky Obscured)

12
15
19
15
12
11
13
12
15
9
6
5
7
3
6
3
3
2
15
27
37
39
40
38

Medium Clouds (% Sky Obscured)

44
51
19
10
0
16
5
35
37
15
1
2
4
14
42
41
31
15
20
18
20
17
10
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)

7
9
9
9
9
9
9
9
8
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 (%)

23
8
9
17
24
26
10
18
9
11
20
11
13
9
4
6
7
6
12
13
12
14
13
7

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
10
8
8
9
10
9
9
11
13
14
15
14
14
13
13
7
7
6
6
6
6
6
6

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

77
78
83
78
77
81
84
75
70
64
61
68
64
63
64
61
62
63
66
66
67
70
71
72

Pressure (mb)

1010
1010
1010
1010
1010
1011
1011
1012
1012
1012
1012
1013
1013
1013
1014
1014
1011
1012
1012
1012
1013
1013
1013
1013

Ozone (du)

390
389
391
396
398
399
401
400
402
398
392
384
379
367
360
355
353
352
350
349
347
346
346
346

Sunday 4

Waning Gibbous 96%

17:24

10:03

03 Bad
04 Bad
05 OK
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

Sun - Rise: 08:44, Set: 16:13, Transit: 12:28. Moon - Rise: 17:24, Set: 10:03. Civil Dark: 16:56 - 08:00. Nautical Dark: 17:43 - 07:14. Astro Dark: 18:26 - 06:30

Total Clouds (% Sky Obscured)

69
54
37
42
48
55
57
59
61
69
78
86
84
84
85
82
76
71
64
59
55
55
54
53

Low Clouds (% Sky Obscured)

40
44
37
42
48
49
53
58
61
68
68
71
70
69
69
65
61
57
55
53
45
41
41
41

Medium Clouds (% Sky Obscured)

0
0
0
0
3
4
3
2
1
6
11
16
33
48
64
66
67
68
46
30
14
14
12
11

High Clouds (% Sky Obscured)

0
1
1
1
2
3
2
1
1
7
12
15
9
4
0
0
0
0
0
0
0
0
1
1

ISS Passover

Visibility (miles)

9
9
8
7
5
2
0
1
2
3
5
7
9
6
3
0
0
0
0
0
0
0
1
2

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
Snow
Snow
Snow
Snow
Snow
Sleet
None
None
None
None
None

Precipitation Probability (%)

11
11
7
16
20
23
25
27
26
25
24
21
34
45
56
83
94
94
68
44
9
14
12
4

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0.1
0.2
0.5
0.6
0.4
0.3
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-5
-4
-4
-2
-2
-1
-1
-1
-1
-1
-1
-1
-0
-0
0
1
1
1
1
1
0
0
-1
-1

Relative Humidity (%)

75
78
80
84
87
92
94
92
88
83
81
82
80
86
93
100
100
100
100
100
98
98
98
98

Pressure (mb)

1014
1014
1014
1014
1014
1015
1015
1015
1015
1015
1015
1015
1014
1014
1014
1014
1014
1014
1014
1014
1015
1015
1015
1015

Ozone (du)

346
347
349
351
355
358
362
365
368
371
374
377
380
382
385
387
384
381
378
375
371
368
368
368

Monday 5

Waning Gibbous 90%

18:59

10:23

Sun - Rise: 08:44, Set: 16:14, Transit: 12:29. Moon - Rise: 18:59, Set: 10:23. Civil Dark: 16:58 - 08:00. Nautical Dark: 17:44 - 07:14. Astro Dark: 18:28 - 06:30

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 Cathedral's Quarter, Belfast, United Kingdom (54.60,-5.93)

Generated: 30/12/25 03:37:09. Forecast: 30/12/25 to 05/01/26. Timezone: UTC+0.00