Clear Outside v1.0 - International Weather Forecasts For Astronomers

Monday 29

Waxing Gibbous 72%

12:39

04:04

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 OK
00 Bad
01 Bad
02 Bad
03 OK
04 Bad
05 Bad
06 Bad

Sun - Rise: 08:44, Set: 16:44, Transit: 12:44. Moon - Rise: 12:39, 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)

80
71
78
77
64
73
70
70
70
61
76
88
78
60
63
53
46
59
62
56
35
52
63
53

Low Clouds (% Sky Obscured)

80
71
78
74
64
72
70
63
65
61
76
88
78
60
63
53
46
59
62
56
34
52
63
53

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)

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

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
90
100
59
2
2
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

79
84
89
91
86
83
83
83
84
91
78
78
75
76
76
70
70
65
60
58
55
53
64
70

Pressure (mb)

1027
1027
1027
1027
1027
1027
1026
1026
1026
1026
1026
1026
1026
1026
1026
1026
1027
1027
1028
1028
1028
1028
1029
1029

Ozone (du)

297
294
292
292
293
293
292
289
282
284
286
288
285
284
285
283
283
284
289
288
286
281
280
278

Tuesday 30

Waxing Gibbous 82%

13:00

05:35

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

Sun - Rise: 08:44, Set: 16:45, Transit: 12:45. Moon - Rise: 13:00, 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)

22
0
0
0
14
24
27
7
34
1
4
0
8
36
74
92
70
37
35
68
66
50
24
29

Low Clouds (% Sky Obscured)

22
0
0
0
14
24
27
7
34
0
4
0
0
32
69
90
70
37
35
62
66
24
24
29

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
1
5
17
26
0
0
0
46
45
35
0
3

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
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
4
11
13
1
0
1
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
8
7
7
7
9
9
10
9
8
7
7
7
6
5
4
3
2
0
2
2
3
4
4

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

71
73
73
70
66
62
58
56
55
57
60
63
67
69
71
73
73
73
70
66
63
65
65
66

Pressure (mb)

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

Ozone (du)

277
278
282
285
287
297
305
309
323
334
334
338
337
335
336
335
332
333
333
334
334
332
329
329

Wednesday 31

Waxing Gibbous 91%

13:28

07:05

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

Sun - Rise: 08:44, Set: 16:46, Transit: 12:45. Moon - Rise: 13:28, 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)

36
34
92
84
85
100
99
76
81
66
6
9
37
38
49
59
56
65
68
66
66
71
76
86

Low Clouds (% Sky Obscured)

33
23
91
72
73
100
99
59
67
47
2
7
27
31
34
37
47
56
58
53
47
50
64
70

Medium Clouds (% Sky Obscured)

4
12
4
15
24
15
24
18
8
8
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
1
1
9
4
26
58
17
6
8
13
24
23
22
23

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
1
9
8
6
15
13
1
0
0
0
0
0
0
0
0
0
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

70
74
78
77
76
74
83
83
82
83
86
89
89
91
89
91
91
92
89
86
86
89
91
92

Pressure (mb)

1029
1029
1029
1029
1029
1028
1028
1027
1027
1026
1026
1025
1025
1025
1024
1024
1023
1022
1021
1020
1020
1019
1018
1017

Ozone (du)

326
324
321
324
323
320
320
320
320
319
321
324
326
321
318
314
312
312
312
314
317
317
316
315

Thursday 1

Waxing Gibbous 97%

14:11

07:05

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
05 Bad
06 Bad

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

Total Clouds (% Sky Obscured)

86
89
91
93
95
97
98
99
100
100
100
100
100
98
100
98
95
93
75
86
85
64
52
48

Low Clouds (% Sky Obscured)

70
79
80
75
66
61
59
52
48
60
73
85
81
80
81
81
80
77
64
76
77
55
49
48

Medium Clouds (% Sky Obscured)

0
0
0
6
11
17
18
24
25
40
52
45
45
45
45
50
41
35
34
26
18
13
6
1

High Clouds (% Sky Obscured)

31
43
60
48
44
34
51
74
100
100
100
100
67
33
0
0
0
3
0
0
0
1
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 (%)

4
5
4
4
3
1
4
10
8
26
25
29
25
22
14
14
19
9
11
14
16
9
6
6

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

92
92
92
86
81
79
79
82
88
86
89
88
88
88
89
89
89
88
88
91
93
93
94
94

Pressure (mb)

1016
1015
1014
1013
1012
1011
1010
1009
1008
1007
1006
1006
1006
1005
1005
1005
1005
1004
1004
1004
1004
1004
1004
1004

Ozone (du)

318
315
312
307
311
322
328
328
330
332
340
353
365
378
387
389
385
382
380
378
373
368
366
361

Friday 2

Waxing Gibbous 100%

15:13

08:22

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
05 Bad
06 Bad

Sun - Rise: 08:44, Set: 16:49, Transit: 12:46. Moon - Rise: 15:13, Set: 08:22. Civil Dark: 17:27 - 08:05. Nautical Dark: 18:09 - 07:23. Astro Dark: 18:49 - 06:43

Total Clouds (% Sky Obscured)

59
72
62
83
74
67
62
59
55
58
58
59
75
76
76
73
70
68
73
75
76
69
65
57

Low Clouds (% Sky Obscured)

52
57
60
51
51
61
62
59
36
43
34
31
37
39
51
42
34
22
26
29
34
34
35
35

Medium Clouds (% Sky Obscured)

2
0
0
0
0
2
0
0
0
0
0
0
0
0
0
2
4
7
33
63
76
69
65
57

High Clouds (% Sky Obscured)

2
1
2
1
1
0
0
5
5
5
5
5
0
0
0
0
0
0
0
5
5
10
10
10

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 (%)

6
4
3
3
4
0
1
1
0
1
1
0
1
1
1
3
2
0
2
3
1
13
14
8

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

96
94
94
94
88
86
85
82
73
72
74
73
72
71
70
70
72
74
78
80
83
84
86
86

Pressure (mb)

1004
1004
1004
1005
1005
1004
1004
1004
1003
1003
1003
1003
1003
1002
1001
1001
1001
1001
1000
1000
1000
999
999
999

Ozone (du)

355
343
329
316
306
297
294
289
286
286
287
288
289
291
293
295
294
293
292
294
295
297
299
300

Saturday 3

Full Moon 99%

16:33

09:19

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
05 Bad
06 Bad

Sun - Rise: 08:44, Set: 16:50, Transit: 12:47. Moon - Rise: 16:33, Set: 09:19. Civil Dark: 17:28 - 08:05. Nautical Dark: 18:10 - 07:23. Astro Dark: 18:50 - 06:43

Total Clouds (% Sky Obscured)

56
58
61
60
64
68
78
81
84
89
90
91
90
86
85
80
76
72
69
63
56
53
46
43

Low Clouds (% Sky Obscured)

40
47
58
60
64
68
78
81
84
89
90
91
90
86
85
80
76
72
69
63
56
53
46
43

Medium Clouds (% Sky Obscured)

56
58
61
60
64
68
78
81
84
89
90
91
90
86
85
80
75
70
69
63
56
53
46
43

High Clouds (% Sky Obscured)

10
10
5
5
0
0
0
0
5
5
10
10
15
20
30
35
40
40
40
40
56
40
46
43

ISS Passover

Visibility (miles)

9
7
5
3
2
1
0
0
0
0
0
0
0
0
0
0
0
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
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain

Precipitation Probability (%)

34
41
40
50
55
57
80
95
95
95
95
95
95
95
95
95
95
95
95
95
95
95
89
73

Precipitation Amount (mm)

0
0
0
0.1
0.1
0.1
0.4
0.7
1
1.1
1.3
1.4
1.2
1.1
1
1.2
1.3
1.1
1
0.8
0.8
0.7
0.5
0.4

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

89
89
92
94
96
98
100
98
100
100
100
98
98
100
100
100
100
100
100
100
100
100
100
98

Pressure (mb)

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

Ozone (du)

301
310
318
327
335
344
353
351
349
347
346
345
344
344
344
344
341
337
334
333
331
330
333
336

Sunday 4

Waning Gibbous 96%

18:02

09:58

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

Sun - Rise: 08:44, Set: 16:51, Transit: 12:47. Moon - Rise: 18:02, Set: 09:58. Civil Dark: 17:29 - 08:05. Nautical Dark: 18:11 - 07:23. Astro Dark: 18:51 - 06:43

Total Clouds (% Sky Obscured)

48
54
62
51
40
33
52
75
99
80
64
51
72
90
100
96
91
89

Low Clouds (% Sky Obscured)

48
54
59
51
40
28
27
26
25
20
20
10
31
52
74
60
48
43

Medium Clouds (% Sky Obscured)

48
54
62
50
40
33
52
75
95
75
57
42
35
25
11
9
7
5

High Clouds (% Sky Obscured)

45
45
40
40
40
33
52
75
95
78
64
45
48
44
42
27
14
2

ISS Passover

Visibility (miles)

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

Fog (%)

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

Precipitation Type

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

Precipitation Probability (%)

70
63
53
65
72
79
80
66
39
37
34
28
35
38
38
36
32
25

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

6
8
11
14
10
6
8
7
7
8
8
7
7
8
8
9
8
6

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

100
94
93
89
91
94
98
98
96
98
96
98
98
98
98
98
96
92

Pressure (mb)

991
991
991
991
991
992
992
993
994
995
997
998
999
1000
1002
1003
1005
1006

Ozone (du)

340
342
344
347
348
350
351
352
352
353
355
357
359
360
361
362
365
367

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

Generated: 29/12/25 07:54:53. Forecast: 29/12/25 to 04/01/26. Timezone: UTC+1.00