Clear Outside v1.0 - International Weather Forecasts For Astronomers

Sunday 27

Waning Gibbous 100%

19:23

08:32

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
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad

Sun - Rise: 07:37, Set: 19:29, Transit: 13:33. Moon - Rise: 19:23, Set: 08:32. Civil Dark: 20:02 - 07:04. Nautical Dark: 20:40 - 06:26. Astro Dark: 21:20 - 05:46

Total Clouds (% Sky Obscured)

75
81
83
85
76
87
70
82
77
91
73
68
100
100
100
96
93
98
100
77
100
87
94
100

Low Clouds (% Sky Obscured)

5
12
9
5
10
22
26
23
12
0
0
0
0
24
26
23
20
18
7
0
0
0
0
0

Medium Clouds (% Sky Obscured)

75
58
14
28
30
30
20
36
67
80
71
64
60
35
50
47
44
43
38
26
48
26
7
17

High Clouds (% Sky Obscured)

75
81
82
40
38
50
34
42
4
30
5
3
100
100
100
80
75
96
100
63
100
77
92
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
24
100
90
2
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
0
0
0
0
0
0
0
0
0
0
0
0
0
0
7
1
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
4
3
3
3
3
3
3
3
5
7
8
9
10
9
9
9
7
5
4
5
5
5
5

Chance of Frost

Temperature (°C)

14
13
13
12
12
12
11
11
12
15
17
20
21
23
24
24
24
24
22
20
19
18
18
17

Feels Like (°C)

12
12
12
12
12
12
11
11
11
14
15
18
19
20
21
21
21
22
21
19
18
16
16
16

Dew Point (°C)

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

Relative Humidity (%)

76
79
83
84
86
86
86
84
76
63
53
47
45
42
39
39
37
41
48
48
49
50
54
59

Pressure (mb)

1021
1021
1020
1020
1019
1019
1018
1018
1018
1018
1017
1017
1017
1016
1016
1015
1015
1015
1015
1015
1015
1016
1016
1017

Ozone (du)

289
290
291
291
290
289
289
288
286
286
287
286
284
282
281
280
279
278
276
276
277
278
278
278

Monday 28

Waning Gibbous 98%

19:40

09:55

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
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 OK

Sun - Rise: 07:39, Set: 19:27, Transit: 13:33. Moon - Rise: 19:40, Set: 09:55. Civil Dark: 19:59 - 07:06. Nautical Dark: 20:38 - 06:27. Astro Dark: 21:17 - 05:48

Total Clouds (% Sky Obscured)

100
99
100
100
100
99
100
100
99
97
97
92
97
100
99
98
100
100
100
100
78
69
89
37

Low Clouds (% Sky Obscured)

4
0
0
10
12
15
12
6
49
43
16
13
35
15
13
19
19
2
15
0
0
0
0
0

Medium Clouds (% Sky Obscured)

43
60
33
51
74
84
76
42
62
79
72
56
67
86
81
76
82
93
99
100
67
60
60
19

High Clouds (% Sky Obscured)

100
99
100
100
100
95
100
100
96
80
92
78
89
100
94
91
100
100
100
100
75
69
89
37

ISS Passover

Visibility (miles)

9
9
9
9
9
9
8
9
9
9
9
9
9
9
9
9
9
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
None
None
None
None
None
None
None
None
None
None
None
None
Very Light Rain
None
None
None
None
None
None
None

Precipitation Probability (%)

0
0
0
1
3
5
9
6
6
2
1
0
0
0
1
5
40
30
14
8
5
2
0
1

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

17
16
16
16
15
15
15
15
16
18
20
21
23
23
24
24
23
22
21
20
20
19
19
18

Feels Like (°C)

16
16
16
15
15
15
15
15
17
19
20
21
23
23
23
23
22
22
21
20
19
18
18
17

Dew Point (°C)

11
11
11
11
11
11
12
12
12
13
14
14
13
14
13
13
13
16
17
17
16
16
15
14

Relative Humidity (%)

68
71
72
73
74
78
83
83
77
72
68
62
54
55
51
50
50
67
76
80
78
78
80
77

Pressure (mb)

1017
1017
1017
1017
1018
1018
1018
1019
1019
1019
1019
1019
1019
1019
1019
1018
1018
1018
1018
1018
1018
1017
1017
1017

Ozone (du)

279
281
281
281
281
281
281
279
280
281
282
282
281
282
281
282
282
282
283
284
286
287
287
287

Tuesday 29

Waning Gibbous 93%

20:02

11:21

01 OK
02 OK
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 OK
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: 07:40, Set: 19:24, Transit: 13:32. Moon - Rise: 20:02, Set: 11:21. Civil Dark: 19:57 - 07:07. Nautical Dark: 20:35 - 06:29. Astro Dark: 21:15 - 05:50

Total Clouds (% Sky Obscured)

44
47
85
77
92
95
97
98
96
99
83
33
91
93
77
100
100
100
79
79
79
79
78
77

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
3
2
2
1
50

Medium Clouds (% Sky Obscured)

44
8
60
77
92
89
94
82
64
79
71
26
2
93
49
54
99
100
79
79
79
79
78
77

High Clouds (% Sky Obscured)

44
47
85
62
88
64
65
87
89
94
64
33
91
93
71
100
100
94
65
55
3
3
3
32

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

Chance of Frost

Temperature (°C)

18
18
17
18
18
19
19
19
20
21
23
25
26
28
28
28
27
27
25
23
23
22
21
21

Feels Like (°C)

16
16
15
16
16
16
17
17
18
19
20
22
25
27
27
27
26
26
24
22
21
20
19
19

Dew Point (°C)

12
10
10
9
9
9
10
10
11
11
11
12
14
15
15
15
15
16
15
13
12
11
11
11

Relative Humidity (%)

67
60
60
57
55
53
55
55
55
51
45
44
47
46
44
45
47
51
54
52
51
52
54
51

Pressure (mb)

1017
1016
1016
1016
1016
1016
1016
1016
1016
1017
1017
1017
1017
1016
1016
1015
1015
1015
1015
1016
1016
1016
1016
1015

Ozone (du)

288
289
289
288
289
290
291
291
291
290
289
288
288
288
288
288
287
289
288
288
288
287
286
285

Wednesday 30

Waning Gibbous 86%

20:32

12:48

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
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad

Sun - Rise: 07:42, Set: 19:22, Transit: 13:32. Moon - Rise: 20:32, Set: 12:48. Civil Dark: 19:55 - 07:09. Nautical Dark: 20:33 - 06:31. Astro Dark: 21:12 - 05:52

Total Clouds (% Sky Obscured)

75
75
76
75
80
90
100
100
100
100
99
98
98
99
99
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

55
3
11
2
0
0
0
0
0
2
8
14
22
61
69
69
72
75
83
84
80
83
90
85

Medium Clouds (% Sky Obscured)

75
75
69
47
16
27
41
92
53
72
95
93
91
94
97
100
99
99
98
94
91
90
92
93

High Clouds (% Sky Obscured)

39
55
66
75
80
90
100
100
100
100
97
96
95
97
99
100
100
100
100
100
100
100
100
100

ISS Passover

Visibility (miles)

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

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
Light Rain
Light Rain
Light Rain
Light Rain
Very Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain

Precipitation Probability (%)

0
2
0
0
0
1
0
0
0
0
3
3
31
42
78
92
95
91
83
95
95
95
95
95

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.4
0.4
1.6
0.4
0.3
0.6
1
1
0.7
0.5

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

21
21
21
21
21
20
20
20
21
22
23
24
25
25
24
22
20
20
19
19
19
19
19
18

Feels Like (°C)

19
19
18
17
17
17
17
17
18
19
20
21
22
23
21
20
19
20
19
19
19
18
19
18

Dew Point (°C)

10
10
8
6
7
8
8
8
10
11
11
11
13
15
17
19
18
19
18
18
18
18
18
17

Relative Humidity (%)

50
48
41
38
41
44
45
45
48
48
47
45
47
53
65
83
86
93
92
92
93
93
96
92

Pressure (mb)

1015
1015
1015
1014
1014
1014
1014
1015
1015
1015
1015
1015
1015
1015
1016
1016
1016
1016
1017
1017
1017
1018
1018
1018

Ozone (du)

283
282
281
279
278
277
275
274
274
274
274
274
273
273
274
274
274
274
275
275
276
277
278
278

Thursday 1

Waning Gibbous 77%

21:16

14:11

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 OK
14 OK
15 OK
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad

Sun - Rise: 07:43, Set: 19:20, Transit: 13:32. Moon - Rise: 21:16, Set: 14:11. Civil Dark: 19:53 - 07:11. Nautical Dark: 20:31 - 06:32. Astro Dark: 21:10 - 05:53

Total Clouds (% Sky Obscured)

100
62
78
63
70
75
76
69
65
56
54
67
43
44
46
53
67
81
95
96
97
98
98
96

Low Clouds (% Sky Obscured)

89
20
50
18
18
18
18
17
16
16
18
17
16
13
12
14
19
14
14
18
17
15
9
9

Medium Clouds (% Sky Obscured)

95
20
25
29
28
31
30
24
15
4
2
1
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

62
55
51
57
55
56
52
39
22
2
9
38
8
14
28
40
60
77
93
91
85
80
80
75

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 (%)

17
9
4
2
8
9
3
4
4
2
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)

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

Chance of Frost

Temperature (°C)

18
18
17
17
17
16
16
16
16
17
17
18
19
20
20
20
20
19
18
17
16
16
15
15

Feels Like (°C)

18
18
19
17
18
17
17
16
16
17
17
17
17
19
19
19
19
19
20
20
15
15
15
15

Dew Point (°C)

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

Relative Humidity (%)

90
89
90
90
93
95
93
92
87
79
72
63
57
50
49
46
44
48
52
56
58
61
64
63

Pressure (mb)

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

Ozone (du)

281
281
283
284
285
286
287
286
285
285
285
286
286
287
287
287
287
287
287
286
286
286
286
286

Friday 2

Waning Gibbous 66%

22:16

15:21

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

Sun - Rise: 07:45, Set: 19:18, Transit: 13:31. Moon - Rise: 22:16, Set: 15:21. Civil Dark: 19:50 - 07:12. Nautical Dark: 20:29 - 06:34. Astro Dark: 21:08 - 05:55

Total Clouds (% Sky Obscured)

90
80
77
73
70
61
58
52
38
26
24
22
24
34
43
48
56
58
61
57
54
49
41
33

Low Clouds (% Sky Obscured)

9
6
5
5
4
2
1
1
1
0
2
5
6
7
8
9
6
4
2
1
1
0
0
0

Medium Clouds (% Sky Obscured)

0
3
7
10
34
56
58
52
38
26
24
22
24
32
34
36
36
39
39
45
50
49
34
17

High Clouds (% Sky Obscured)

55
40
40
35
37
43
57
52
38
26
24
22
24
34
43
48
49
43
36
26
14
3
2
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
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
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)

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

Chance of Frost

Temperature (°C)

14
14
14
13
13
12
12
11
13
15
18
19
20
21
21
21
21
20
18
17
16
15
14
14

Feels Like (°C)

15
14
12
12
12
11
11
10
12
13
15
15
16
16
20
20
19
20
20
20
15
15
14
14

Dew Point (°C)

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

Relative Humidity (%)

64
64
65
66
69
69
70
71
68
64
62
58
56
53
52
51
51
56
61
67
69
73
78
78

Pressure (mb)

1028
1028
1028
1028
1028
1028
1028
1028
1028
1028
1028
1028
1028
1028
1028
1027
1027
1027
1028
1028
1028
1028
1029
1029

Ozone (du)

286
286
286
285
285
286
286
287
287
288
288
289
290
291
294
296
299
302
305
308
309
311
313
313

Saturday 3

Third Quarter 54%

23:32

16:14

Sun - Rise: 07:46, Set: 19:16, Transit: 13:31. Moon - Rise: 23:32, Set: 16:14. Civil Dark: 19:48 - 07:14. Nautical Dark: 20:26 - 06:36. Astro Dark: 21:05 - 05:57

Total Clouds (% Sky Obscured)

Low Clouds (% Sky Obscured)

Medium Clouds (% Sky Obscured)

High Clouds (% Sky Obscured)

ISS Passover

Visibility (miles)

Fog (%)

Precipitation Type

Precipitation Probability (%)

Precipitation Amount (mm)

Wind Speed/Direction (mph)

Chance of Frost

Temperature (°C)

Feels Like (°C)

Dew Point (°C)

Relative Humidity (%)

Pressure (mb)

Ozone (du)

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

Generated: 27/09/26 01:51:07. Forecast: 27/09/26 to 03/10/26. Timezone: UTC+2.00