Clear Outside v1.0 - International Weather Forecasts For Astronomers

Monday 15

Waning Crescent 30%

00:19

17:24

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
07 Bad
08 Bad
09 Bad

Sun - Rise: 07:20, Set: 19:56, Transit: 13:37. Moon - Rise: 00:19, Set: 17:24. Civil Dark: 20:29 - 06:47. Nautical Dark: 21:08 - 06:08. Astro Dark: 21:50 - 05:26

Total Clouds (% Sky Obscured)

39
39
44
78
82
82
69
66
47
47
57
73
60
65
57
64
70
68
69
72
71
73
72
62

Low Clouds (% Sky Obscured)

39
39
44
49
55
68
64
66
39
38
47
62
60
65
57
64
70
68
69
72
71
72
72
57

Medium Clouds (% Sky Obscured)

4
3
23
31
33
23
18
7
9
16
11
15
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
8

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
8
9
9
9
9
9
9
9
9
9
9
9
9
9
9
8

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 (%)

11
12
3
2
0
0
0
12
4
0
0
0
0
1
3
5
4
5
14
7
14
3
18
29

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)

15
15
15
22
21
20
19
19
20
21
21
21
21
22
21
21
22
21
21
20
19
19
17
17

Chance of Frost

Temperature (°C)

16
17
17
19
19
19
19
19
18
17
17
16
15
15
15
14
14
14
14
14
13
13
13
14

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

72
67
49
42
39
42
42
44
49
51
55
57
60
66
70
71
70
71
71
72
72
72
70
74

Pressure (mb)

1010
1010
1010
1010
1010
1010
1010
1010
1010
1011
1011
1011
1012
1012
1013
1013
1013
1014
1014
1014
1015
1015
1016
1016

Ozone (du)

279
278
277
277
279
281
282
285
287
292
295
298
301
305
306
304
305
305
305
304
304
304
304
303

Tuesday 16

Waning Crescent 29%

01:39

18:04

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
07 Bad
08 Bad
09 Bad

Sun - Rise: 07:22, Set: 19:53, Transit: 13:37. Moon - Rise: 01:39, Set: 18:04. Civil Dark: 20:26 - 06:49. Nautical Dark: 21:06 - 06:10. Astro Dark: 21:47 - 05:28

Total Clouds (% Sky Obscured)

66
61
100
100
100
100
100
92
90
100
100
100
100
100
100
100
99
99
96
99
95
100
98
93

Low Clouds (% Sky Obscured)

41
59
52
49
51
49
31
57
31
45
53
51
45
38
36
39
64
53
47
62
60
41
44
43

Medium Clouds (% Sky Obscured)

18
0
23
22
23
25
28
20
18
9
8
7
12
21
35
53
56
78
86
79
84
87
78
81

High Clouds (% Sky Obscured)

6
2
99
90
100
100
100
92
90
97
100
100
100
100
99
100
83
97
64
81
26
33
25
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 (%)

26
20
7
5
2
1
1
1
0
5
15
14
5
9
4
17
36
36
26
34
30
24
29
42

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)

18
19
20
20
20
19
17
16
15
13
12
11
11
10
10
10
10
10
9
8
9
8
9
9

Chance of Frost

Temperature (°C)

15
16
17
17
18
18
18
18
17
16
15
14
14
13
13
13
13
13
13
12
12
12
13
13

Feels Like (°C)

11
11
12
11
13
12
13
12
14
13
11
11
11
10
10
11
11
11
11
10
10
10
10
11

Dew Point (°C)

9
8
6
5
3
3
4
3
4
4
6
9
10
10
10
11
11
11
11
11
11
11
11
11

Relative Humidity (%)

69
59
49
43
38
36
37
38
40
44
53
68
75
79
83
84
86
90
90
92
92
93
87
84

Pressure (mb)

1017
1017
1017
1017
1018
1018
1018
1018
1018
1019
1019
1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
1020

Ozone (du)

301
302
304
305
305
304
302
304
300
295
290
285
280
276
271
268
265
262
260
258
256
255
254
254

Wednesday 17

Waning Crescent 20%

03:01

18:32

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
07 Bad
08 Bad
09 Bad

Sun - Rise: 07:23, Set: 19:51, Transit: 13:36. Moon - Rise: 03:01, Set: 18:32. Civil Dark: 20:24 - 06:50. Nautical Dark: 21:03 - 06:11. Astro Dark: 21:44 - 05:30

Total Clouds (% Sky Obscured)

97
93
88
87
89
97
93
99
100
94
95
96
71
59
62
61
60
81
60
65
69
70
81
77

Low Clouds (% Sky Obscured)

48
59
61
67
55
54
79
96
100
93
90
80
71
59
62
61
60
66
60
65
69
70
79
77

Medium Clouds (% Sky Obscured)

94
86
75
75
54
81
91
81
90
78
78
83
28
20
20
28
25
61
16
19
17
16
14
15

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
1
1
59
71
59
62
46
31
15
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 (%)

28
10
10
12
14
12
7
4
3
1
0
0
0
0
0
0
1
2
2
3
4
4
4
4

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
9
9
10
13
13
14
11
9
8
7
7
8
9
9
9
8
9
9
9
9
9
9
9

Chance of Frost

Temperature (°C)

14
15
16
17
18
18
19
19
19
19
19
18
18
18
18
17
17
17
17
16
16
16
16
17

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

76
83
79
71
59
51
54
58
58
59
63
64
64
70
72
74
74
73
74
73
73
74
74
65

Pressure (mb)

1020
1020
1020
1020
1019
1019
1019
1018
1018
1018
1018
1018
1019
1019
1019
1019
1019
1019
1019
1019
1019
1019
1019
1020

Ozone (du)

253
252
252
252
253
252
253
252
253
255
258
259
259
260
260
260
261
261
260
260
260
260
259
258

Thursday 18

Waning Crescent 12%

04:22

18:51

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 OK
02 OK
03 OK
04 OK
05 OK
06 OK
07 OK
08 OK
09 Bad

Sun - Rise: 07:25, Set: 19:49, Transit: 13:36. Moon - Rise: 04:22, Set: 18:51. Civil Dark: 20:22 - 06:52. Nautical Dark: 21:01 - 06:13. Astro Dark: 21:42 - 05:32

Total Clouds (% Sky Obscured)

73
73
78
69
69
75
75
71
67
63
61
63
61
54
50
44
40
34
27
32
32
37
40
79

Low Clouds (% Sky Obscured)

73
73
61
47
57
70
75
71
67
61
61
59
47
39
33
30
28
23
21
21
21
21
27
35

Medium Clouds (% Sky Obscured)

13
13
16
19
19
25
25
36
40
31
31
30
30
33
26
21
17
10
2
3
3
3
11
50

High Clouds (% Sky Obscured)

0
2
4
7
37
66
75
71
45
17
11
6
0
0
0
0
0
0
0
1
1
1
1
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 (%)

3
3
3
2
3
4
4
5
6
4
8
8
4
5
4
0
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)

11
12
12
12
12
12
11
11
9
6
6
5
5
5
6
6
6
6
6
6
6
6
6
7

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

17
18
19
20
19
20
19
20
21
20
20
19
19
17
17
17
16
15
15
15
15
15
15
17

Dew Point (°C)

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

Relative Humidity (%)

56
49
44
38
31
27
24
23
24
30
34
37
40
43
45
47
49
51
56
62
67
70
73
65

Pressure (mb)

1020
1021
1020
1020
1020
1020
1020
1020
1020
1020
1021
1021
1022
1022
1022
1022
1022
1022
1022
1022
1022
1022
1022
1022

Ozone (du)

257
258
258
258
260
260
261
261
260
261
260
260
260
259
257
257
258
258
256
255
254
255
254
253

Friday 19

Waning Crescent 6%

05:39

19:06

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

Sun - Rise: 07:26, Set: 19:46, Transit: 13:36. Moon - Rise: 05:39, Set: 19:06. Civil Dark: 20:19 - 06:54. Nautical Dark: 20:58 - 06:15. Astro Dark: 21:39 - 05:34

Total Clouds (% Sky Obscured)

79
72
67
68
55
39
30
22
23
8
8
6
4
25
47
68
62
57
53
50
46
35
39
48

Low Clouds (% Sky Obscured)

41
39
36
33
28
24
19
13
7
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

25
30
34
34
23
13
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
22
43

High Clouds (% Sky Obscured)

0
6
13
19
13
6
2
2
4
3
0
0
0
25
47
68
62
54
38
30
20
10
22
33

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)

9
9
10
10
10
9
9
9
7
4
4
3
2
2
2
3
5
5
5
5
5
5
5
7

Chance of Frost

Temperature (°C)

20
23
25
27
28
29
29
29
28
26
23
22
21
20
19
19
19
19
19
18
18
18
18
21

Feels Like (°C)

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

Dew Point (°C)

12
12
11
9
8
7
6
6
6
8
7
9
9
11
11
11
11
12
12
12
13
13
14
14

Relative Humidity (%)

59
50
40
33
27
24
22
22
24
31
36
42
48
56
57
59
61
63
65
68
70
71
75
64

Pressure (mb)

1022
1023
1022
1022
1022
1021
1021
1020
1020
1020
1019
1019
1019
1020
1019
1019
1019
1018
1017
1017
1017
1016
1016
1016

Ozone (du)

254
254
254
254
254
254
254
254
254
255
255
255
256
256
256
255
255
255
254
254
255
255
256
255

Saturday 20

Waning Crescent 2%

06:53

19:18

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
07 Bad
08 Bad
09 Bad

Sun - Rise: 07:28, Set: 19:44, Transit: 13:35. Moon - Rise: 06:53, Set: 19:18. Civil Dark: 20:17 - 06:55. Nautical Dark: 20:56 - 06:16. Astro Dark: 21:37 - 05:36

Total Clouds (% Sky Obscured)

57
71
82
89
91
95
100
94
88
83
90
96
100
100
100
100
100
100
100
99
98
97
98
99

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
8
15
21
30
40
42
34
33
32
23
12
5
19
34
50
60
69

Medium Clouds (% Sky Obscured)

57
64
60
59
49
36
22
32
40
48
64
80
93
72
51
36
38
40
43
57
71
85
92
95

High Clouds (% Sky Obscured)

41
60
79
89
91
95
100
94
88
83
90
96
100
100
100
100
100
100
100
96
94
88
92
96

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
7
5
3
3

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
Very Light Rain
Light Rain
Light Rain

Precipitation Probability (%)

0
0
0
0
1
0
0
12
22
32
43
43
46
38
32
9
18
19
20
41
53
60
85
95

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.2
0.5
0.7

Wind Speed/Direction (mph)

8
10
10
10
11
10
9
9
7
7
9
8
7
7
5
4
3
3
3
3
3
4
4
3

Chance of Frost

Temperature (°C)

23
25
27
28
30
30
30
30
26
23
20
20
19
19
19
18
18
18
18
18
17
17
17
18

Feels Like (°C)

19
20
21
22
23
30
29
27
28
29
30
17
18
19
18
18
18
18
19
19
19
19
19
19

Dew Point (°C)

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

Relative Humidity (%)

55
48
44
40
37
36
35
33
44
59
79
82
86
91
90
90
90
92
92
92
93
95
95
95

Pressure (mb)

1016
1016
1015
1015
1014
1014
1013
1013
1013
1013
1013
1013
1014
1014
1014
1014
1014
1014
1014
1014
1014
1015
1015
1015

Ozone (du)

255
255
253
251
250
250
249
249
250
250
250
250
250
249
249
250
250
250
251
251
252
253
253
254

Sunday 21

New Moon 0%

08:06

19:29

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

Sun - Rise: 07:29, Set: 19:42, Transit: 13:35. Moon - Rise: 08:06, Set: 19:29. Civil Dark: 20:15 - 06:57. Nautical Dark: 20:54 - 06:18. Astro Dark: 21:34 - 05:38

Total Clouds (% Sky Obscured)

100
100
100
100
99
97
96
97
98
99
99
100
100
100
100
100

Low Clouds (% Sky Obscured)

77
79
79
79
81
83
85
76
67
64
73
83
92
94
95
92

Medium Clouds (% Sky Obscured)

100
95
89
82
82
81
83
88
94
97
83
69
54
40
25
10

High Clouds (% Sky Obscured)

100
100
100
100
99
97
96
87
76
65
72
81
90
94
97
100

ISS Passover

Visibility (miles)

3
3
5
7
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

Precipitation Type

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

Precipitation Probability (%)

95
95
95
85
75
66
64
85
86
85
79
83
95
95
95
91

Precipitation Amount (mm)

1.2
1
0.7
0.6
0.4
0
0
0.5
0.5
0.4
0.3
0.2
0.3
0.5
0.7
0.3

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

95
95
95
93
92
89
86
84
88
92
95
95
95
95
96
96

Pressure (mb)

1015
1016
1015
1015
1015
1015
1015
1014
1014
1014
1014
1014
1014
1014
1014
1014

Ozone (du)

254
254
255
256
258
259
259
260
261
262
262
263
264
265
264
264

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

Generated: 15/09/25 10:14:00. Forecast: 15/09/25 to 21/09/25. Timezone: UTC+2.00