Clear Outside v1.0 - International Weather Forecasts For Astronomers

Monday 29

Waxing Gibbous 72%

13:00

04:04

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

Sun - Rise: 08:44, Set: 16:44, Transit: 12:45. Moon - Rise: 13:00, Set: 04:04. Civil Dark: 17:24 - 08:05. Nautical Dark: 18:06 - 07:23. Astro Dark: 18:46 - 06:43

Total Clouds (% Sky Obscured)

90
92
93
87
77
71
92
68
46
87
54
81
55
45
41
37
25
46
61
47
47
13
17
0

Low Clouds (% Sky Obscured)

63
70
69
86
77
71
92
68
46
87
54
81
55
45
41
37
25
46
61
47
47
13
17
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)

0
0
0
1
1
1
7
10
1
1
3
6
3
1
1
1
1
1
1
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
9
1
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-1
-1
-1
-1
-3
-3
-3
-3
-3
-3
-3
-4
-4
-6
-7
-7
-5
-4
-4
-3
-4
-4
-4
-4

Relative Humidity (%)

82
81
86
88
75
75
77
77
76
76
73
66
64
56
54
52
64
70
73
74
71
68
63
60

Pressure (mb)

1026
1026
1026
1026
1025
1026
1026
1026
1026
1026
1027
1027
1028
1028
1028
1028
1028
1029
1029
1030
1030
1031
1031
1031

Ozone (du)

291
287
285
284
289
286
281
279
279
282
283
287
290
288
285
283
281
279
282
285
289
295
301
304

Tuesday 30

Waxing Gibbous 82%

13:28

05:35

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

Sun - Rise: 08:44, Set: 16:45, Transit: 12:45. Moon - Rise: 13:28, Set: 05:35. Civil Dark: 17:24 - 08:05. Nautical Dark: 18:07 - 07:23. Astro Dark: 18:47 - 06:43

Total Clouds (% Sky Obscured)

0
0
16
44
38
18
33
1
14
34
82
75
63
59
82
43
71
54
70
51
40
4
37
39

Low Clouds (% Sky Obscured)

0
0
16
42
38
18
33
0
0
24
70
74
63
59
46
26
61
54
70
50
34
0
21
30

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
3
7
7
6
0
0
24
18
10
0
0
5
10
0
5
5

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
1
1
5
1
0
0
0
0
0
0
0
0
0
1
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)

10
9
8
8
8
8
7
6
5
4
3
2
1
1
2
3
4
5
5
5
6
7
8
8

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

56
55
58
63
66
71
77
81
84
84
83
80
77
74
71
70
70
68
71
72
71
69
68
69

Pressure (mb)

1030
1030
1030
1031
1031
1031
1032
1032
1032
1032
1031
1031
1031
1031
1030
1030
1030
1030
1029
1029
1029
1029
1028
1028

Ozone (du)

308
321
335
334
335
336
336
338
339
336
335
334
332
331
328
326
320
317
316
317
320
323
325
323

Wednesday 31

Waxing Gibbous 91%

No Rise

07:05

14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Good
20 OK
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

Sun - Rise: 08:44, Set: 16:46, Transit: 12:46. Moon - Rise: No Rise, Set: 07:05. Civil Dark: 17:25 - 08:05. Nautical Dark: 18:08 - 07:23. Astro Dark: 18:48 - 06:43

Total Clouds (% Sky Obscured)

84
72
47
45
40
5
18
65
64
58
68
70
59
51
72
72
71
81
90
100
100
100
100
100

Low Clouds (% Sky Obscured)

79
70
47
45
39
4
9
32
37
43
62
53
50
44
52
52
41
41
46
46
57
68
79
82

Medium Clouds (% Sky Obscured)

6
3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
8
14
21
22
24
20
20

High Clouds (% Sky Obscured)

0
0
0
0
0
0
6
41
46
26
16
31
10
10
7
11
16
44
72
100
100
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
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 (%)

2
7
13
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
2
1
2
3
2
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)

7
7
7
7
6
7
7
8
8
9
10
10
10
11
11
10
11
12
13
14
14
15
16
16

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

77
80
83
91
89
91
91
91
91
91
91
87
87
87
91
91
91
91
92
92
86
81
83
83

Pressure (mb)

1027
1026
1026
1026
1025
1025
1025
1024
1023
1022
1022
1021
1020
1019
1018
1017
1016
1015
1014
1013
1012
1011
1010
1009

Ozone (du)

322
324
323
321
323
322
318
314
314
313
312
313
313
313
313
309
307
306
306
306
311
325
328
325

Thursday 1

Waxing Gibbous 97%

14:11

08:22

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
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad

Sun - Rise: 08:44, Set: 16:47, Transit: 12:46. Moon - Rise: 14:11, Set: 08:22. Civil Dark: 17:26 - 08:05. Nautical Dark: 18:09 - 07:23. Astro Dark: 18:49 - 06:43

Total Clouds (% Sky Obscured)

100
100
100
100
100
95
90
73
82
81
78
83
83
93
91
88
87
84
82
82
79
79
79
83

Low Clouds (% Sky Obscured)

83
85
80
77
73
73
71
71
72
74
75
72
71
75
74
72
68
51
43
43
39
36
36
38

Medium Clouds (% Sky Obscured)

25
25
20
58
20
14
11
3
4
2
0
11
24
34
38
69
77
64
53
47
39
53
58
63

High Clouds (% Sky Obscured)

100
100
100
100
99
67
32
0
0
0
0
0
1
1
1
5
5
5
5
4
4
5
5
5

ISS Passover

Visibility (miles)

9
9
0
0
9
0
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
Very Light Rain
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

20
34
27
32
48
30
15
17
10
11
7
21
12
19
10
11
2
2
2
0
0
0
0
0

Precipitation Amount (mm)

0
0
0
0
0.2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

3
3
2
2
2
2
3
3
3
3
3
2
2
2
2
2
2
1
1
1
1
1
2
3

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

83
89
94
96
93
96
89
82
82
82
82
86
89
93
89
88
86
86
88
89
86
83
79
74

Pressure (mb)

1008
1007
1006
1006
1005
1005
1005
1005
1005
1005
1004
1004
1004
1005
1005
1005
1005
1005
1005
1005
1006
1006
1005
1005

Ozone (du)

331
342
377
410
410
411
410
408
401
396
388
381
380
378
378
377
378
376
373
368
362
358
350
342

Friday 2

Waxing Gibbous 100%

15:13

09:19

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
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad

Sun - Rise: 08:44, Set: 16:49, Transit: 12:47. Moon - Rise: 15:13, Set: 09:19. Civil Dark: 17:27 - 08:05. Nautical Dark: 18:09 - 07:23. Astro Dark: 18:49 - 06:43

Total Clouds (% Sky Obscured)

87
90
90
89
90
88
88
87
92
96
100
100
100
100
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

64
57
55
48
38
24
27
32
37
34
48
52
56
61
54
54
51
55
62
65
66
63
61
67

Medium Clouds (% Sky Obscured)

75
84
83
85
87
79
70
57
71
74
69
75
78
79
84
88
100
100
100
100
100
100
100
100

High Clouds (% Sky Obscured)

0
0
15
29
44
51
59
66
77
89
100
100
100
100
87
74
60
74
87
100
100
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
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
1
1
0
4
5
4
8
8
6
8
8
6
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-2
-2
-2
-2
-2
-2
-2
-2
-2
-2
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1

Relative Humidity (%)

72
70
73
76
78
80
81
86
88
88
91
92
92
92
92
94
94
92
91
89
88
84
81
79

Pressure (mb)

1005
1005
1005
1005
1004
1004
1004
1004
1004
1003
1003
1002
1002
1002
1002
1002
1001
1001
1001
1001
1001
1001
1000
1000

Ozone (du)

338
330
326
326
321
315
310
305
301
298
299
306
307
307
308
310
312
314
317
321
325
331
337
344

Saturday 3

Full Moon 99%

16:33

09:58

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
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad

Sun - Rise: 08:44, Set: 16:50, Transit: 12:47. Moon - Rise: 16:33, Set: 09:58. Civil Dark: 17:28 - 08:05. Nautical Dark: 18:10 - 07:23. Astro Dark: 18:50 - 06:43

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

74
81
85
89
92
88
83
80
82
85
88
92
93
91
90
90
87
88
89
92
88
87
85
86

Medium Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100

High Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
89

ISS Passover

Visibility (miles)

9
9
9
9
9
8
9
9
9
7
5
2
3
3
4
3
1
0
0
0
0
0
0
0

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
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow

Precipitation Probability (%)

15
10
27
32
29
24
16
5
19
23
22
34
41
44
64
73
80
95
95
95
95
95
95
83

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0.1
0.1
0.3
0.4
0.4
0.7
0.9
1.1
0.9
0.8
0.7
0.5

Wind Speed/Direction (mph)

5
5
5
5
4
5
5
5
6
6
6
7
7
7
8
9
10
11
11
12
12
12
13
13

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-1
-1
-1
-1
-1
-0
-0
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-0
-0
0
0

Relative Humidity (%)

79
80
83
84
88
93
93
92
92
92
92
92
91
91
89
92
94
96
96
96
98
98
100
98

Pressure (mb)

999
999
999
999
998
998
998
998
998
998
998
997
997
996
996
995
994
994
994
993
993
993
993
993

Ozone (du)

348
353
358
358
359
359
357
354
352
355
357
360
360
360
360
361
361
362
363
364
366
367
368
370

Sunday 4

Waning Gibbous 96%

18:02

10:25

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
05 Bad
06 Bad

Sun - Rise: 08:43, Set: 16:51, Transit: 12:48. Moon - Rise: 18:02, Set: 10:25. Civil Dark: 17:29 - 08:05. Nautical Dark: 18:11 - 07:23. Astro Dark: 18:51 - 06:43

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
98
97
96
81
65
50

Low Clouds (% Sky Obscured)

85
87
86
84
83
82
79
75
68
62
56
56
57
58
47
36
23

Medium Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
94
87
68
56
57
50

High Clouds (% Sky Obscured)

85
79
78
85
89
90
94
100
94
86
75
72
70
70
58
47
35

ISS Passover

Visibility (miles)

0
0
0
3
6
9
9
9
9
9
9
9
9
8
8
8
9

Fog (%)

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

Precipitation Type

Snow
Snow
Snow
Snow
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

69
59
51
43
33
34
32
28
24
19
14
14
12
9
8
6
2

Precipitation Amount (mm)

0.3
0.3
0.2
0.1
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-5
-5
-4
-4
-5
-5
-5
-5
-5
-4
-4
-5
-5
-5
-5
-6
-6

Dew Point (°C)

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

Relative Humidity (%)

98
98
98
96
94
92
92
94
94
94
94
94
94
94
94
94
96

Pressure (mb)

993
992
992
993
993
994
994
994
995
995
996
997
998
999
1000
1001
1002

Ozone (du)

370
370
370
369
369
369
368
368
367
367
367
367
367
367
367
365
363

Forecast for Brussels, Bruxelles-Capitale, Kingdom of Belgium (50.85,4.35)

Generated: 29/12/25 14:11:33. Forecast: 29/12/25 to 04/01/26. Timezone: UTC+1.00