Clear Outside v1.0 - International Weather Forecasts For Astronomers

Sunday 21

Waxing Crescent 6%

10:51

18:44

19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad
01 OK
02 OK
03 Bad
04 Bad
05 OK
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 OK
14 OK
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)

72
62
57
92
55
76
30
40
87
100
34
55
84
99
91
56
85
71
28
22
51
74
90
74

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
48
60
59

Medium Clouds (% Sky Obscured)

8
1
2
7
40
76
24
40
51
67
34
55
58
73
63
49
39
30
28
18
12
69
86
72

High Clouds (% Sky Obscured)

50
45
57
69
45
49
24
24
72
93
12
20
19
97
75
41
68
54
28
22
51
36
17
27

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)

7
7
6
5
6
6
5
6
6
5
6
6
5
4
4
3
3
2
1
2
3
5
6
5

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

82
77
75
75
75
75
73
75
73
75
75
73
72
75
73
71
68
64
63
62
64
67
71
73

Pressure (mb)

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

Ozone (du)

298
302
309
313
315
320
326
331
332
334
336
338
338
340
346
353
358
359
361
364
367
367
369
371

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
86
80
88
88
93
91
86
95
90
91
97
96
96
86
89
89
79
80
76
75
73
73
63

Low Clouds (% Sky Obscured)

57
64
71
84
72
86
91
84
93
90
91
94
93
92
86
89
89
79
80
76
75
73
73
63

Medium Clouds (% Sky Obscured)

88
73
60
65
39
39
47
3
6
4
35
9
70
91
30
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

100
32
14
13
8
12
17
34
30
21
21
74
24
20
22
8
2
3
1
0
1
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 (%)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

75
76
77
79
79
80
82
81
82
80
82
83
85
82
82
80
76
71
68
70
72
75
78
82

Pressure (mb)

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

Ozone (du)

375
379
382
383
384
385
384
381
377
377
373
370
365
361
359
357
355
357
355
355
354
355
357
355

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
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 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)

60
62
63
70
73
65
63
62
62
65
55
53
55
55
48
46
53
48
44
47
56
45
48
47

Low Clouds (% Sky Obscured)

60
62
62
66
73
65
63
62
62
65
55
53
55
55
48
46
53
48
44
47
54
45
48
47

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2
0
0
0

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
1
2
2
2
1
1
1
0
0
0
0
0
0
4
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

83
85
86
86
86
86
88
88
88
88
86
81
77
78
78
80
78
74
68
64
63
64
65
65

Pressure (mb)

1019
1020
1021
1021
1022
1022
1023
1024
1024
1025
1025
1025
1026
1027
1028
1029
1029
1029
1029
1029
1029
1029
1030
1030

Ozone (du)

355
353
356
358
357
355
356
355
356
357
357
355
356
356
358
365
372
371
370
370
369
366
366
367

Wednesday 24

Waxing Crescent 28%

11:45

21:18

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

Sun - Rise: 08:44, Set: 16:41, Transit: 12:42. Moon - Rise: 11:45, Set: 21:18. Civil Dark: 17:20 - 08:05. Nautical Dark: 18:03 - 07:22. Astro Dark: 18:43 - 06:42

Total Clouds (% Sky Obscured)

51
46
42
45
50
46
43
43
39
27
15
0
0
0
0
0
0
0
0
0
0
0
0
0

Low Clouds (% Sky Obscured)

51
46
42
45
50
46
43
43
39
27
15
0
0
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
1
3
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-7
-7
-7
-7
-8
-8
-8
-9
-9
-10
-11
-12
-13
-14
-14
-14
-13
-12
-11
-10
-10
-9
-9
-9

Relative Humidity (%)

66
66
66
66
65
65
64
63
62
58
55
50
46
43
42
40
41
42
43
45
47
48
51
52

Pressure (mb)

1030
1030
1030
1030
1030
1030
1030
1029
1029
1029
1028
1028
1028
1028
1029
1029
1028
1028
1027
1027
1027
1027
1027
1028

Ozone (du)

369
370
371
370
370
371
371
374
375
372
369
368
368
367
365
363
364
365
364
363
362
362
363
364

Thursday 25

Waxing Crescent 38%

11:58

22:36

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

Sun - Rise: 08:44, Set: 16:42, Transit: 12:43. Moon - Rise: 11:58, Set: 22:36. Civil Dark: 17:21 - 08:05. Nautical Dark: 18:04 - 07:22. Astro Dark: 18:44 - 06:42

Total Clouds (% Sky Obscured)

0
0
0
0
0
2
2
1
0
0
0
1
30
29
25
23
18
13
8
4
0
0
0
0

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
1
0
0
0
0
29
29
25
23
18
13
8
4
0
0
0
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
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

53
55
57
60
63
64
65
69
71
72
74
75
76
76
75
75
71
68
65
66
69
71
74
75

Pressure (mb)

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

Ozone (du)

365
363
363
362
361
360
362
366
367
369
367
361
356
355
354
352
352
352
352
352
353
353
354
354

Friday 26

Waxing Crescent 49%

12:10

23:53

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

Sun - Rise: 08:44, Set: 16:43, Transit: 12:43. Moon - Rise: 12:10, Set: 23:53. Civil Dark: 17:22 - 08:05. Nautical Dark: 18:04 - 07:23. Astro Dark: 18:44 - 06:42

Total Clouds (% Sky Obscured)

3
6
9
5
2
0
1
1
2
2
3
3
3
2
2
2
2
2
1
1
0
0
0
0

Low Clouds (% Sky Obscured)

3
6
9
3
1
0
0
0
0
1
2
3
3
2
2
2
2
2
1
1
0
0
0
0

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
1
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

80
81
83
86
87
87
87
87
86
84
83
81
79
81
81
81
77
74
70
72
73
74
77
81

Pressure (mb)

1031
1031
1031
1032
1032
1032
1032
1032
1032
1032
1032
1032
1032
1032
1032
1033
1032
1032
1032
1032
1032
1032
1033
1033

Ozone (du)

355
357
358
360
360
361
361
362
362
363
364
365
366
366
366
366
366
367
367
365
364
362
362
362

Saturday 27

First Quarter 46%

12:24

01:13

19 Good
20 Good
21 Good
22 Good
23 Good
00 OK
01 OK
02 OK
03 OK
04 OK
05 OK
06 OK
07 OK
08 Bad
09 Bad
10 Bad
11 OK
12 OK

Sun - Rise: 08:44, Set: 16:44, Transit: 12:44. Moon - Rise: 12:24, Set: 01:13. Civil Dark: 17:23 - 08:05. Nautical Dark: 18:05 - 07:23. Astro Dark: 18:45 - 06:43

Total Clouds (% Sky Obscured)

1
3
5
9
13
21
17
17
17
16
18
20
28
41
52
46
41
38

Low Clouds (% Sky Obscured)

1
3
4
9
13
17
12
7
2
1
1
0
0
0
1
0
0
1

Medium Clouds (% Sky Obscured)

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
17
17
17
16
18
20
28
41
46
37
30
18

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
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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

84
87
91
94
92
92
92
92
92
92
92
92
92
91
91
91
84
80

Pressure (mb)

1033
1034
1034
1034
1034
1034
1035
1035
1035
1034
1034
1034
1034
1034
1035
1035
1034
1034

Ozone (du)

361
361
360
359
355
352
348
346
344
342
342
341
341
340
340
339
338
338

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

Generated: 21/12/25 19:51:32. Forecast: 21/12/25 to 27/12/25. Timezone: UTC+1.00