Clear Outside v1.0 - International Weather Forecasts For Astronomers

Sunday 21

Waxing Crescent 6%

10:56

18:05

18 Bad
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

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: 18:15 - 06:29

Total Clouds (% Sky Obscured)

98
100
100
100
100
100
100
100
100
99
100
100
100
100
100
99
99
100
100
100
100
100
99
92

Low Clouds (% Sky Obscured)

85
87
72
81
71
83
94
87
94
85
96
100
100
98
100
99
97
100
90
88
78
93
87
81

Medium Clouds (% Sky Obscured)

20
52
58
62
100
100
82
72
100
90
89
100
100
88
82
35
45
45
38
45
46
40
40
25

High Clouds (% Sky Obscured)

61
94
100
100
100
100
100
100
75
91
100
100
93
62
64
65
60
60
97
100
100
91
29
28

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
6
7
7
0
0
8
9
9
9
8
9
9
8
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
Very Light Rain
Very Light Rain
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

1
2
6
6
5
6
36
43
43
41
44
66
61
45
24
35
24
20
14
7
19
4
9
8

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0.2
0.3
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

6
5
5
5
5
5
5
5
5
5
5
5
5
6
6
6
6
7
6
7
7
7
7
7

Dew Point (°C)

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

Relative Humidity (%)

93
91
93
93
95
96
96
95
96
96
96
96
98
96
95
96
95
96
96
96
96
96
98
98

Pressure (mb)

1009
1009
1009
1010
1010
1009
1009
1009
1008
1008
1007
1006
1006
1006
1006
1007
1007
1007
1008
1008
1008
1008
1009
1010

Ozone (du)

376
375
374
374
376
375
375
377
377
378
378
379
379
383
386
383
377
369
361
354
350
349
348
344

Monday 22

Waxing Crescent 12%

11:13

18:05

18 Bad
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

Sun - Rise: 08:45, Set: 16:01, Transit: 12:23. Moon - Rise: 11:13, 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)

100
90
100
100
97
100
95
98
100
100
99
96
90
88
96
92
89
89
97
98
97
97
95
94

Low Clouds (% Sky Obscured)

87
77
86
84
86
82
81
93
99
97
91
88
79
78
90
82
76
78
80
81
84
87
73
85

Medium Clouds (% Sky Obscured)

31
10
12
22
25
57
47
39
56
48
48
50
40
26
28
24
21
41
27
28
38
33
29
24

High Clouds (% Sky Obscured)

98
27
100
100
63
100
53
41
93
69
38
12
9
39
51
42
43
37
72
51
46
56
15
2

ISS Passover

Visibility (miles)

9
9
9
9
9
9
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
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

5
2
2
6
7
3
3
3
6
9
9
6
1
1
1
1
0
0
1
1
1
0
1
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
5
4
3
3
3
3
3
3
3
4
4
4
4
3
3
4
4
5
5
4
4

Chance of Frost

Temperature (°C)

9
9
9
9
9
8
8
8
8
8
8
8
8
8
8
8
8
9
9
9
9
9
9
8

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

98
98
98
96
98
98
100
98
98
93
93
93
95
93
95
93
93
93
91
91
93
95
96
95

Pressure (mb)

1010
1011
1012
1013
1013
1014
1014
1015
1015
1016
1017
1017
1018
1019
1020
1021
1022
1023
1023
1023
1024
1025
1026
1027

Ozone (du)

338
334
331
329
329
332
337
337
337
333
331
331
331
331
331
336
343
342
339
332
326
324
322
318

Tuesday 23

Waxing Crescent 19%

11:25

19:28

18 Bad
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 OK

Sun - Rise: 08:45, Set: 16:01, Transit: 12:23. Moon - Rise: 11:25, Set: 19:28. Civil Dark: 16:46 - 08:00. Nautical Dark: 17:33 - 07:13. Astro Dark: 18:16 - 06:29

Total Clouds (% Sky Obscured)

92
97
99
98
97
95
100
100
99
88
91
95
96
81
76
65
77
89
96
91
75
58
47
31

Low Clouds (% Sky Obscured)

81
87
89
87
91
85
98
100
97
79
85
91
92
70
66
56
69
89
92
86
75
58
47
31

Medium Clouds (% Sky Obscured)

15
45
60
76
90
90
59
82
63
10
9
4
18
14
13
17
23
17
16
15
13
10
5
0

High Clouds (% Sky Obscured)

3
0
0
0
3
0
0
0
0
0
0
0
0
0
1
0
2
1
0
3
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
5
1
2
2
3
3
2
1
1
1
2
1
1
1
1
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)

3
3
3
3
4
3
3
4
4
6
7
7
7
6
7
7
7
8
8
8
8
8
7
7

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

96
93
93
95
93
95
95
95
94
94
94
93
93
91
90
90
88
87
87
87
85
88
91
93

Pressure (mb)

1027
1028
1029
1029
1030
1030
1031
1032
1032
1032
1033
1033
1034
1034
1035
1036
1036
1037
1037
1036
1037
1037
1037
1037

Ozone (du)

315
312
308
307
309
308
308
310
310
312
309
305
303
297
295
296
296
298
298
300
300
299
297
296

Wednesday 24

Waxing Crescent 28%

11:34

20:51

18 OK
19 OK
20 OK
21 Bad
22 OK
23 OK
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

Sun - Rise: 08:45, Set: 16:02, Transit: 12:24. Moon - Rise: 11:34, Set: 20:51. Civil Dark: 16:47 - 08:01. Nautical Dark: 17:34 - 07:14. Astro Dark: 18:17 - 06:30

Total Clouds (% Sky Obscured)

34
28
27
55
34
32
50
68
78
68
67
63
63
60
55
62
71
78
80
81
80
68
62
58

Low Clouds (% Sky Obscured)

34
28
27
36
34
31
50
66
76
62
57
59
59
59
54
62
71
78
77
74
73
63
56
58

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)

0
0
0
24
2
2
0
5
0
2
2
0
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
1
0
0
1
1
0
2
2
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

94
94
93
91
91
93
93
93
91
91
89
91
91
91
89
89
88
82
79
83
79
79
80
80

Pressure (mb)

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

Ozone (du)

296
299
301
301
302
302
301
301
302
303
304
306
309
310
310
310
311
309
311
311
312
313
313
311

Thursday 25

Waxing Crescent 39%

11:42

22:13

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

Sun - Rise: 08:46, Set: 16:03, Transit: 12:24. Moon - Rise: 11:42, Set: 22:13. Civil Dark: 16:47 - 08:01. Nautical Dark: 17:34 - 07:14. Astro Dark: 18:18 - 06:30

Total Clouds (% Sky Obscured)

51
32
24
31
37
41
26
13
2
2
2
2
20
14
11
10
8
7
20
32
44
41
38
36

Low Clouds (% Sky Obscured)

51
32
24
26
29
25
16
9
2
2
2
2
17
13
10
9
8
7
20
32
44
41
37
32

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)

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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

79
79
86
89
91
93
91
89
89
91
91
89
89
89
89
88
85
83
80
82
83
83
83
86

Pressure (mb)

1036
1036
1036
1036
1036
1036
1036
1035
1035
1035
1035
1035
1035
1035
1035
1035
1035
1035
1035
1035
1035
1035
1035
1036

Ozone (du)

310
311
312
313
313
315
317
321
327
332
330
332
335
337
338
340
341
343
344
343
343
342
342
341

Friday 26

Waxing Crescent 36%

11:50

23:36

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

Sun - Rise: 08:46, Set: 16:04, Transit: 12:25. Moon - Rise: 11:50, Set: 23:36. Civil Dark: 16:48 - 08:01. Nautical Dark: 17:35 - 07:14. Astro Dark: 18:18 - 06:30

Total Clouds (% Sky Obscured)

33
29
22
23
24
27
29
30
32
48
58
65
60
56
50
69
85
100
93
86
78
80
88
96

Low Clouds (% Sky Obscured)

27
21
15
17
19
21
22
30
32
48
58
65
59
50
42
47
51
62
65
65
65
58
55
46

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
1
1
1

High Clouds (% Sky Obscured)

0
0
0
0
0
0
1
1
1
5
7
8
12
17
23
45
66
86
71
59
47
62
77
92

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 (%)

1
3
1
2
1
0
1
2
0
1
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

88
89
89
91
91
89
91
89
86
84
84
88
89
89
89
91
86
83
79
82
82
85
85
85

Pressure (mb)

1036
1036
1037
1037
1037
1038
1038
1038
1038
1038
1038
1038
1039
1039
1040
1040
1040
1040
1040
1040
1040
1040
1040
1040

Ozone (du)

340
340
340
340
338
337
336
333
331
328
326
323
321
319
317
316
314
312
310
310
309
308
307
306

Saturday 27

First Quarter 50%

11:58

01:01

18 Bad
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

Sun - Rise: 08:46, Set: 16:05, Transit: 12:25. Moon - Rise: 11:58, Set: 01:01. Civil Dark: 16:49 - 08:01. Nautical Dark: 17:36 - 07:14. Astro Dark: 18:19 - 06:30

Total Clouds (% Sky Obscured)

90
82
75
82
89
94
84
77
69
64
58
49
55
66
81
85
91
97

Low Clouds (% Sky Obscured)

50
57
60
49
33
38
51
55
69
64
58
49
55
66
81
85
82
77

Medium Clouds (% Sky Obscured)

1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

78
62
38
42
39
49
37
25
13
9
3
1
3
5
7
4
4
5

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 (%)

0
0
0
0
0
0
0
0
0
0
0
0
1
2
0
1
1
0

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)

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

Chance of Frost

Temperature (°C)

3
3
3
3
3
2
3
2
2
3
3
4
4
3
2
2
2
3

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

85
85
83
83
85
85
86
86
86
86
86
85
86
86
85
85
85
83

Pressure (mb)

1040
1040
1040
1040
1040
1040
1040
1039
1039
1039
1038
1038
1038
1038
1038
1038
1038
1037

Ozone (du)

305
304
303
302
300
298
296
295
295
294
293
292
291
291
290
290
290
289

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

Generated: 21/12/25 17:41:17. Forecast: 21/12/25 to 27/12/25. Timezone: UTC+0.00