Clear Outside v1.0 - International Weather Forecasts For Astronomers

Wednesday 17

Waning Crescent 3%

07:41

14:49

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
18 Bad

Sun - Rise: 08:41, Set: 16:37, Transit: 12:39. Moon - Rise: 07:41, Set: 14:49. Civil Dark: 17:17 - 08:01. Nautical Dark: 17:59 - 07:19. Astro Dark: 18:39 - 06:39

Total Clouds (% Sky Obscured)

90
92
94
100
94
92
97
100
100
100
100
100
100
100
96
91
88
91
97
93
99
98
96
100

Low Clouds (% Sky Obscured)

45
44
51
42
56
56
63
39
53
44
47
53
79
100
93
86
65
46
37
32
4
0
0
18

Medium Clouds (% Sky Obscured)

77
23
82
82
14
41
87
94
92
79
57
88
89
75
89
59
46
43
48
30
40
40
58
88

High Clouds (% Sky Obscured)

90
92
94
100
92
91
15
100
100
100
100
100
92
26
22
19
39
39
50
72
92
90
69
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
4
4
6
14
25
21
17
18
3
3
1
1
3
9
20

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
8
10
12
12
13
14
14
15
17
17
17
18
17
16
16
16
16
17
18
19
20
20
21

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

82
85
87
88
90
87
84
82
81
82
81
79
78
77
77
80
81
81
80
76
73
72
70
66

Pressure (mb)

1018
1018
1018
1018
1018
1017
1017
1017
1017
1016
1015
1015
1015
1015
1016
1015
1015
1014
1013
1012
1012
1011
1011
1011

Ozone (du)

314
312
311
310
308
308
307
302
303
305
307
306
303
298
295
296
293
291
290
291
289
287
279
274

Thursday 18

Waning Crescent 1%

08:45

15:31

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
18 Bad

Sun - Rise: 08:41, Set: 16:38, Transit: 12:40. Moon - Rise: 08:45, Set: 15:31. Civil Dark: 17:17 - 08:02. Nautical Dark: 18:00 - 07:19. Astro Dark: 18:40 - 06:39

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
99
99
100
100
100
100
100
97
92

Low Clouds (% Sky Obscured)

31
85
68
75
87
82
68
70
69
78
84
89
92
95
93
87
67
82
74
74
64
44
41
38

Medium Clouds (% Sky Obscured)

97
89
100
100
100
93
100
98
100
99
100
98
100
98
88
99
84
96
100
91
95
92
87
78

High Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
32
79
92
97
100
100
100
79
76

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
5
5
5
6
9
6
5
9
5
6
8
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
Very Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Very Light Rain
Light Rain
Light Rain
Very Light Rain
Very Light Rain
None
None
None
None
None

Precipitation Probability (%)

21
26
34
46
55
44
63
77
78
78
76
78
82
90
80
95
82
57
50
34
12
1
0
0

Precipitation Amount (mm)

0
0
0
0
0.2
0
0.3
0.5
0.4
0.4
0.4
0.4
0.4
0.6
0.3
0.8
0.6
0.2
0.3
0
0
0
0
0

Wind Speed/Direction (mph)

21
20
20
19
19
19
17
15
15
15
15
15
14
12
11
10
9
7
7
8
7
6
5
5

Chance of Frost

Temperature (°C)

13
13
13
12
12
12
12
12
11
11
11
11
11
11
11
11
11
10
10
10
10
10
9
9

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

63
63
64
65
67
72
77
83
86
87
88
88
91
91
91
91
91
87
85
77
71
69
72
73

Pressure (mb)

1011
1011
1011
1011
1012
1012
1013
1013
1014
1014
1014
1014
1015
1015
1016
1017
1018
1018
1018
1018
1019
1019
1020
1020

Ozone (du)

272
274
276
277
273
271
269
270
276
284
294
309
309
312
311
311
316
318
322
324
326
329
332
335

Friday 19

Waning Crescent 0%

09:39

16:25

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
18 Bad

Sun - Rise: 08:42, Set: 16:38, Transit: 12:40. Moon - Rise: 09:39, Set: 16:25. Civil Dark: 17:18 - 08:02. Nautical Dark: 18:00 - 07:20. Astro Dark: 18:40 - 06:40

Total Clouds (% Sky Obscured)

79
88
97
97
97
100
100
100
100
100
100
100
100
98
96
95
96
98
99
99
100
100
100
100

Low Clouds (% Sky Obscured)

34
36
35
32
30
32
37
41
36
43
51
58
60
56
51
62
48
78
79
78
78
71
63
56

Medium Clouds (% Sky Obscured)

62
75
90
73
62
58
60
61
66
66
84
93
100
96
96
95
96
97
81
95
97
89
99
100

High Clouds (% Sky Obscured)

48
38
53
48
80
100
100
100
100
100
98
100
100
72
37
5
5
8
39
70
100
86
73
62

ISS Passover

Visibility (miles)

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

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
0
0
6
27
45
67
66
42
47
52
46
34
34
27

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

75
79
81
82
83
85
86
83
85
85
83
79
79
76
77
80
85
90
93
95
95
95
93
91

Pressure (mb)

1021
1021
1021
1021
1021
1021
1020
1020
1020
1019
1019
1018
1018
1017
1017
1017
1016
1015
1014
1014
1013
1012
1012
1012

Ozone (du)

328
304
301
300
296
293
289
287
285
284
284
284
284
283
284
285
285
285
287
282
281
281
280
281

Saturday 20

New Moon 2%

10:21

17:31

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
18 Bad

Sun - Rise: 08:42, Set: 16:39, Transit: 12:41. Moon - Rise: 10:21, Set: 17:31. Civil Dark: 17:18 - 08:03. Nautical Dark: 18:01 - 07:20. Astro Dark: 18:41 - 06:40

Total Clouds (% Sky Obscured)

100
100
100
99
97
96
98
99
100
100
100
100
96
92
88
89
89
89
93
97
100
98
97
95

Low Clouds (% Sky Obscured)

52
49
48
46
48
47
40
30
23
27
34
41
48
61
78
74
69
62
49
47
40
40
40
35

Medium Clouds (% Sky Obscured)

95
100
100
89
97
96
98
99
100
98
95
93
92
90
88
81
79
77
70
68
66
66
69
60

High Clouds (% Sky Obscured)

73
87
100
81
65
33
37
40
43
62
81
100
78
57
35
38
44
47
65
82
100
93
86
80

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
6
6
7
9
7
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
Very 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

Precipitation Probability (%)

21
16
6
6
8
15
38
57
64
76
67
70
63
41
29
40
27
18
12
8
17
24
5
0

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

90
93
93
93
95
93
93
93
93
91
90
91
91
85
77
72
72
74
75
72
75
78
81
87

Pressure (mb)

1012
1012
1011
1011
1011
1011
1010
1010
1010
1010
1010
1010
1009
1010
1010
1010
1010
1010
1010
1009
1009
1010
1010
1010

Ozone (du)

280
282
284
284
282
281
281
281
283
283
283
283
285
286
287
290
292
296
298
300
302
305
312
318

Sunday 21

Waxing Crescent 6%

10:51

18:44

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
18 Bad

Sun - Rise: 08:43, Set: 16:39, Transit: 12:41. Moon - Rise: 10:51, Set: 18:44. Civil Dark: 17:19 - 08:03. Nautical Dark: 18:01 - 07:21. Astro Dark: 18:41 - 06:41

Total Clouds (% Sky Obscured)

94
93
92
94
97
100
100
100
100
100
100
100
90
95
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

29
16
30
18
14
8
6
4
3
2
3
6
28
48
60
40
20
1
1
1
1
4
6
5

Medium Clouds (% Sky Obscured)

75
83
88
91
94
98
96
93
91
86
86
81
61
69
88
72
52
27
24
16
12
27
42
56

High Clouds (% Sky Obscured)

72
62
54
69
85
100
100
100
100
100
100
100
63
78
94
96
98
100
100
99
99
99
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
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
5
5
5
5
6
5
5
5
5
5
6
5
6
7
8
8
8
9
7
6
6
5
4

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

88
87
88
90
85
81
80
79
81
79
78
77
78
78
80
80
78
77
75
75
77
77
78
78

Pressure (mb)

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

Ozone (du)

323
324
320
318
320
321
323
325
327
332
339
343
346
351
356
361
367
373
378
384
389
395
397
399

Monday 22

Waxing Crescent 12%

11:14

No Set

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
18 Bad

Sun - Rise: 08:43, Set: 16:40, Transit: 12:42. Moon - Rise: 11:14, Set: No Set. Civil Dark: 17:19 - 08:04. Nautical Dark: 18:02 - 07:21. Astro Dark: 18:42 - 06:41

Total Clouds (% Sky Obscured)

100
100
100
100
99
99
100
100
100
100
100
100
100
100
100
96
92
88
90
91
93
93
94
95

Low Clouds (% Sky Obscured)

29
53
79
91
95
99
99
99
99
100
100
100
100
100
100
96
92
88
90
91
92
82
75
71

Medium Clouds (% Sky Obscured)

65
73
82
80
75
73
81
86
90
95
95
95
93
90
83
70
55
44
31
16
4
3
1
0

High Clouds (% Sky Obscured)

99
98
98
95
92
88
86
84
83
82
82
81
60
42
31
34
36
34
39
44
60
41
48
29

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
8
7
5
7
8
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
Very Light Rain
Very Light Rain
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

0
1
1
3
5
7
24
33
41
51
56
55
46
35
22
19
15
5
10
11
11
11
11
8

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0.3
0.3
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

5
4
5
5
5
5
5
5
4
5
4
4
4
4
4
4
4
4
4
4
4
3
4
4

Dew Point (°C)

4
4
4
4
4
4
4
4
5
5
5
5
5
5
5
5
5
5
5
4
4
3
3
3

Relative Humidity (%)

79
79
79
81
81
81
81
84
88
91
90
91
93
93
91
91
90
88
87
85
83
83
85
86

Pressure (mb)

1009
1009
1009
1010
1010
1010
1010
1010
1010
1010
1010
1010
1010
1010
1010
1011
1011
1011
1011
1011
1011
1011
1011
1012

Ozone (du)

402
402
403
404
403
403
403
404
404
405
405
406
407
408
410
411
413
414
416
418
420
422
423
424

Tuesday 23

Waxing Crescent 19%

11:31

20:01

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

Sun - Rise: 08:43, Set: 16:41, Transit: 12:42. Moon - Rise: 11:31, Set: 20:01. Civil Dark: 17:20 - 08:04. Nautical Dark: 18:02 - 07:22. Astro Dark: 18:42 - 06:42

Total Clouds (% Sky Obscured)

93
90
86
91
95
100
100
99
99
99
99
99
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

73
81
80
83
92
100
99
98
98
98
99
99
98
98
96
96
95
91

Medium Clouds (% Sky Obscured)

0
1
1
14
28
37
26
12
2
3
5
6
31
58
89
91
93
95

High Clouds (% Sky Obscured)

30
30
29
40
54
70
59
39
18
38
59
77
74
68
69
64
57
43

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 (%)

8
7
3
7
8
8
11
14
16
15
13
12
10
7
2
3
3
2

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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

88
88
89
89
89
88
88
90
88
88
88
88
86
83
79
76
72
70

Pressure (mb)

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

Ozone (du)

425
426
426
427
425
423
421
414
408
401
400
398
397
396
395
394
394
393

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

Generated: 17/12/25 18:51:22. Forecast: 17/12/25 to 23/12/25. Timezone: UTC+1.00