Clear Outside v1.0 - International Weather Forecasts For Astronomers

Tuesday 16

Waning Crescent 12%

05:20

13:20

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

Sun - Rise: 08:41, Set: 15:58, Transit: 12:19. Moon - Rise: 05:20, Set: 13:20. Civil Dark: 16:42 - 07:56. Nautical Dark: 17:29 - 07:09. Astro Dark: 18:13 - 06:25

Total Clouds (% Sky Obscured)

54
64
67
33
24
9
18
16
21
27
36
66
62
29
33
15
26
94
96
100
100
100
100
100

Low Clouds (% Sky Obscured)

24
23
20
17
19
8
15
15
21
27
35
26
34
24
19
11
2
0
0
4
24
82
100
100

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
72
79
97
99
100
100
100

High Clouds (% Sky Obscured)

54
64
2
0
0
0
0
0
0
0
0
56
41
4
21
5
16
82
58
64
98
100
100
100

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
4

Fog (%)

0
0
0
0
1
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
Light Rain
Light Rain

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
33
95
95

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
0.9
1.3

Wind Speed/Direction (mph)

4
4
3
3
4
4
5
6
7
7
7
6
6
6
6
6
6
6
7
7
10
13
14
17

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

94
94
94
93
91
91
88
86
88
88
91
93
93
94
93
93
91
91
89
88
83
79
78
85

Pressure (mb)

1007
1007
1008
1009
1010
1011
1011
1011
1011
1011
1011
1012
1012
1012
1012
1012
1012
1011
1010
1009
1008
1007
1006
1005

Ozone (du)

349
344
347
352
359
357
361
369
371
360
339
324
323
319
317
308
296
292
289
288
287
285
285
283

Wednesday 17

Waning Crescent 6%

06:37

13:37

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 OK
03 OK
04 Bad

Sun - Rise: 08:42, Set: 15:58, Transit: 12:20. Moon - Rise: 06:37, Set: 13:37. Civil Dark: 16:42 - 07:57. Nautical Dark: 17:29 - 07:10. Astro Dark: 18:13 - 06:26

Total Clouds (% Sky Obscured)

100
100
100
100
95
93
95
100
100
91
100
100
100
100
100
100
100
100
70
65
43
30
33
35

Low Clouds (% Sky Obscured)

100
100
98
100
89
87
87
84
100
57
77
60
65
43
43
55
57
53
70
63
39
28
31
33

Medium Clouds (% Sky Obscured)

98
97
55
16
15
15
56
63
52
55
91
70
71
80
100
100
94
51
55
3
0
0
0
0

High Clouds (% Sky Obscured)

100
100
100
35
30
2
0
54
21
65
71
61
58
59
68
100
100
100
35
0
0
0
0
0

ISS Passover

Visibility (miles)

4
6
8
9
9
9
6
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
None
None
None
None
None
None
Light Rain
Light Rain
Light Rain
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

95
65
38
14
15
27
41
61
91
95
30
22
11
10
7
2
0
30
27
0
0
0
0
0

Precipitation Amount (mm)

1.7
0
0
0
0
0
0
0.4
0.7
1.1
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

18
18
19
18
16
13
13
13
13
11
10
10
9
9
10
10
11
11
12
13
11
12
11
10

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

0
1
1
2
4
5
6
7
8
8
8
7
7
7
6
6
6
5
4
3
5
5
4
5

Dew Point (°C)

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

Relative Humidity (%)

88
88
88
88
91
93
93
91
95
92
88
83
85
90
87
90
90
90
90
85
90
90
91
93

Pressure (mb)

1003
1003
1002
1002
1002
1001
1001
1000
999
999
999
998
998
998
999
999
999
999
1000
1000
1000
1001
1001
1000

Ozone (du)

285
288
287
285
285
285
287
291
291
290
296
298
302
307
309
312
319
321
324
326
318
311
309
315

Thursday 18

Waning Crescent 3%

07:53

14:02

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

Sun - Rise: 08:42, Set: 15:58, Transit: 12:20. Moon - Rise: 07:53, Set: 14:02. Civil Dark: 16:43 - 07:58. Nautical Dark: 17:30 - 07:11. Astro Dark: 18:14 - 06:27

Total Clouds (% Sky Obscured)

41
68
86
100
100
100
100
61
89
97
100
100
16
37
5
33
44
49
67
74
76
76
63
78

Low Clouds (% Sky Obscured)

25
18
4
11
33
23
31
44
47
60
100
64
15
34
4
33
44
49
64
67
70
72
63
74

Medium Clouds (% Sky Obscured)

8
16
16
93
88
78
95
61
82
97
100
100
16
26
5
0
0
0
0
2
2
35
0
0

High Clouds (% Sky Obscured)

0
0
40
100
100
100
100
60
60
35
27
17
0
0
0
0
0
0
0
4
11
35
0
1

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
5
3
2
9
9
9
9
9
9
9
9
7
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
Light Rain
Light Rain
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

0
0
0
0
2
5
8
7
26
51
95
95
15
0
0
0
0
0
0
17
28
16
10
11

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
1.2
1.2
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

9
7
7
5
6
7
9
9
11
11
11
14
13
12
13
12
15
16
18
18
18
17
16
17

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

94
94
94
93
91
87
75
77
78
81
88
93
90
88
90
85
83
83
83
79
85
86
85
84

Pressure (mb)

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

Ozone (du)

321
335
341
341
355
368
369
376
377
378
374
365
363
373
371
376
368
366
363
358
346
347
344
337

Friday 19

Waning Crescent 1%

09:00

14:41

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: 08:43, Set: 15:58, Transit: 12:21. Moon - Rise: 09:00, Set: 14:41. Civil Dark: 16:43 - 07:58. Nautical Dark: 17:30 - 07:11. Astro Dark: 18:14 - 06:27

Total Clouds (% Sky Obscured)

58
66
78
80
49
53
48
65
55
62
71
68
67
78
89
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

58
66
72
71
49
53
48
56
55
60
71
68
67
69
67
58
60
58
59
59
68
82
87
85

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
1
2
7
48
68
80
82
90
98
99
100
100
100

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
22
0
0
9
9
13
72
86
100
100
100
100
100
100
100
85
70

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

Precipitation Probability (%)

3
12
8
6
8
5
3
7
4
2
7
9
10
18
5
9
2
4
3
31
42
55
68
70

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
0.3
0.4

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

7
7
7
7
7
7
8
8
7
7
7
7
7
7
7
7
7
7
7
7
7
7
8
8

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

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

Pressure (mb)

1001
1002
1003
1004
1005
1006
1007
1007
1007
1007
1008
1008
1008
1008
1008
1007
1007
1006
1005
1005
1004
1003
1002
1001

Ozone (du)

338
344
349
349
348
331
319
315
289
288
291
296
291
289
288
289
287
283
283
285
288
291
295
296

Saturday 20

New Moon 0%

09:54

15:36

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: 08:43, Set: 15:59, Transit: 12:21. Moon - Rise: 09:54, Set: 15:36. Civil Dark: 16:44 - 07:59. Nautical Dark: 17:31 - 07:12. Astro Dark: 18:15 - 06:28

Total Clouds (% Sky Obscured)

100
100
100
100
98
97
95
88
82
75
72
69
68
88
90
87
87
87
87
90
94
99
95
91

Low Clouds (% Sky Obscured)

84
77
71
67
70
74
77
81
81
58
72
69
68
88
90
87
87
87
87
87
86
83
85
88

Medium Clouds (% Sky Obscured)

100
100
100
100
97
93
88
70
60
45
55
67
68
67
62
62
68
69
80
90
94
99
95
91

High Clouds (% Sky Obscured)

60
70
85
100
85
67
47
45
36
30
25
25
30
15
50
50
50
50
50
50
45
45
45
45

ISS Passover

Visibility (miles)

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

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

Precipitation Probability (%)

47
31
39
27
32
45
52
71
38
42
74
73
33
48
45
33
47
55
61
63
69
76
80
82

Precipitation Amount (mm)

0
0
0
0
0
0
0
0.4
0
0
0.4
0.5
0
0
0
0
0
0.2
0.3
0.3
0.4
0.5
0.5
0.5

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

6
5
5
5
5
6
6
6
6
6
6
6
5
5
6
5
5
5
5
5
5
5
6
5

Relative Humidity (%)

87
85
85
87
88
90
91
90
93
88
91
96
88
90
90
91
93
93
94
96
94
93
94
93

Pressure (mb)

1001
1000
1000
1000
1000
999
999
998
998
998
998
997
997
997
999
1000
1000
1000
1000
1001
1001
1001
1001
1001

Ozone (du)

300
303
304
304
309
312
307
303
309
313
314
317
324
333
346
358
371
376
380
385
383
382
380
383

Sunday 21

Waxing Crescent 2%

10:31

16:46

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: 08:44, Set: 15:59, Transit: 12:22. Moon - Rise: 10:31, Set: 16:46. Civil Dark: 16:44 - 07:59. Nautical Dark: 17:31 - 07:12. Astro Dark: 18:15 - 06:28

Total Clouds (% Sky Obscured)

85
84
82
84
85
86
84
83
82
81
78
80
84
79
71
65
63
63
65
68
70
74
82
85

Low Clouds (% Sky Obscured)

85
84
82
84
85
86
84
83
78
69
70
73
77
72
67
63
63
63
65
68
70
72
75
76

Medium Clouds (% Sky Obscured)

85
84
74
69
52
33
15
19
23
25
35
43
55
53
51
49
39
37
40
39
47
50
56
67

High Clouds (% Sky Obscured)

45
40
55
55
50
40
45
45
40
35
30
25
20
15
15
20
30
40
50
59
58
62
58
59

ISS Passover

Visibility (miles)

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

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

Precipitation Probability (%)

84
78
72
65
60
54
45
39
30
9
17
14
9
15
12
4
13
14
14
46
60
72
66
60

Precipitation Amount (mm)

0.5
0.5
0.4
0.3
0.3
0.2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.3
0.4
0.3
0.3

Wind Speed/Direction (mph)

14
14
14
14
13
13
13
14
14
14
14
14
13
13
13
12
12
12
11
11
11
12
13
13

Chance of Frost

Temperature (°C)

6
6
6
6
6
6
6
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7

Feels Like (°C)

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

Dew Point (°C)

5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
6
6
6

Relative Humidity (%)

93
94
93
93
93
91
91
90
90
88
87
87
87
87
88
88
88
87
88
88
91
93
94
94

Pressure (mb)

1002
1002
1003
1004
1004
1005
1006
1006
1007
1007
1008
1008
1009
1009
1010
1010
1010
1010
1010
1010
1010
1010
1010
1010

Ozone (du)

385
387
387
387
387
387
386
386
387
388
388
387
385
384
381
379
376
372
368
364
361
359
356
356

Monday 22

Waxing Crescent 6%

10:56

18:05

Sun - Rise: 08:44, Set: 16:00, Transit: 12:22. Moon - Rise: 10:56, Set: 18:05. Civil Dark: 16:45 - 08:00. Nautical Dark: 17:32 - 07:13. Astro Dark: 18:16 - 06:29

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: 16/12/25 05:31:20. Forecast: 16/12/25 to 22/12/25. Timezone: UTC+0.00