Clear Outside v1.0 - International Weather Forecasts For Astronomers

Thursday 18

Waning Crescent 6%

04:22

19:06

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

Sun - Rise: 07:25, Set: 19:46, Transit: 13:36. Moon - Rise: 04:22, Set: 19:06. Civil Dark: 20:19 - 06:52. Nautical Dark: 20:58 - 06:13. Astro Dark: 21:42 - 05:32

Total Clouds (% Sky Obscured)

69
59
49
36
25
30
27
28
35
40
36
6
1
0
8
70
79
15
0
0
0
100
15
0

Low Clouds (% Sky Obscured)

20
30
45
36
25
30
23
22
28
36
29
0
0
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

2
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
1
0
0
1
1
8
6
1
0
8
70
79
15
0
0
0
100
15
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
4
4
4
5
5
5
5
6
6
6
5
7
8
9
9
10
10
11
10
9
8
9

Chance of Frost

Temperature (°C)

17
17
17
17
17
16
15
15
15
14
14
14
16
19
22
24
26
27
28
28
28
27
25
23

Feels Like (°C)

19
19
19
19
18
17
17
16
16
14
13
14
16
18
20
22
23
24
25
25
25
25
23
21

Dew Point (°C)

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

Relative Humidity (%)

71
77
81
82
82
85
86
85
80
71
65
63
56
46
39
34
30
27
26
25
27
31
38
45

Pressure (mb)

1023
1023
1023
1024
1024
1024
1023
1023
1023
1023
1022
1023
1022
1023
1022
1022
1021
1021
1020
1019
1019
1018
1018
1018

Ozone (du)

258
257
257
257
256
257
257
256
255
255
255
255
255
255
254
254
255
254
254
255
255
254
254
254

Friday 19

Waning Crescent 2%

05:39

19:18

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

Sun - Rise: 07:26, Set: 19:44, Transit: 13:35. Moon - Rise: 05:39, Set: 19:18. Civil Dark: 20:17 - 06:54. Nautical Dark: 20:56 - 06:15. Astro Dark: 21:39 - 05:34

Total Clouds (% Sky Obscured)

18
5
18
100
100
100
100
86
96
61
100
100
100
100
100
40
17
82
100
100
100
100
100
97

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
7
0
0
22

Medium Clouds (% Sky Obscured)

0
0
6
25
15
34
29
33
94
61
75
78
15
72
67
40
17
53
90
99
100
88
33
23

High Clouds (% Sky Obscured)

18
5
2
97
92
91
96
58
80
21
99
100
99
100
100
17
17
68
100
100
100
100
100
91

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
1
1
5
1
6
18
3
10
3
31
42
28
64
19
31

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

Chance of Frost

Temperature (°C)

22
22
21
20
20
21
21
21
21
20
20
20
21
22
24
25
27
29
29
28
27
25
22
21

Feels Like (°C)

21
20
20
20
19
20
20
20
20
18
18
18
19
20
21
22
24
25
26
27
25
25
21
20

Dew Point (°C)

12
13
12
12
13
14
14
14
14
13
13
13
13
12
11
11
12
12
14
16
19
20
16
16

Relative Humidity (%)

53
56
57
59
62
64
66
65
66
64
63
61
58
51
43
39
37
34
40
48
61
71
68
70

Pressure (mb)

1018
1018
1018
1017
1017
1016
1016
1015
1015
1015
1014
1014
1014
1014
1013
1013
1012
1012
1011
1011
1010
1010
1011
1011

Ozone (du)

254
254
254
254
253
254
253
253
253
254
254
254
254
254
254
253
253
253
253
255
257
258
258
257

Saturday 20

Waning Crescent 0%

06:53

19:29

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
19 Bad
20 Bad

Sun - Rise: 07:28, Set: 19:42, Transit: 13:35. Moon - Rise: 06:53, Set: 19:29. Civil Dark: 20:15 - 06:55. Nautical Dark: 20:54 - 06:16. Astro Dark: 21:37 - 05:36

Total Clouds (% Sky Obscured)

100
100
100
91
99
96
100
100
100
100
100
100
98
100
100
100
99
100
100
100
99
99
98
83

Low Clouds (% Sky Obscured)

36
39
82
84
69
53
64
58
54
44
29
26
34
31
26
40
26
31
47
61
60
59
65
61

Medium Clouds (% Sky Obscured)

55
29
68
61
66
76
66
84
72
18
36
83
57
38
25
68
89
88
31
100
97
93
80
25

High Clouds (% Sky Obscured)

100
100
100
0
5
51
100
92
100
100
100
100
82
53
95
100
97
100
100
100
96
92
89
64

ISS Passover

Visibility (miles)

9
4
8
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
3
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
Light Rain
Light Rain
Very Light Rain
Very Light Rain

Precipitation Probability (%)

48
54
28
8
17
11
8
1
0
0
0
0
0
0
1
1
0
1
3
4
71
69
53
48

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

9
10
11
12
10
9
9
8
9
9
9
8
8
9
8
9
6
5
4
4
7
9
7
6

Chance of Frost

Temperature (°C)

20
20
20
20
19
17
16
16
15
15
14
14
14
15
16
16
17
17
18
18
18
16
15
15

Feels Like (°C)

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

Dew Point (°C)

16
16
17
17
16
14
13
13
12
12
12
11
11
10
9
8
7
5
4
4
7
11
12
12

Relative Humidity (%)

76
79
84
85
84
82
78
82
83
83
84
86
83
74
66
58
52
44
39
38
48
72
82
82

Pressure (mb)

1011
1011
1011
1011
1012
1012
1012
1012
1012
1012
1013
1013
1013
1014
1014
1014
1014
1013
1013
1013
1013
1013
1014
1014

Ozone (du)

258
260
259
261
261
262
263
266
267
267
267
267
267
269
271
270
271
271
272
272
272
273
276
280

Sunday 21

New Moon 1%

08:06

19:40

21 Bad
22 Bad
23 Bad
00 Bad
01 Bad
02 Bad
03 OK
04 OK
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

Sun - Rise: 07:29, Set: 19:40, Transit: 13:35. Moon - Rise: 08:06, Set: 19:40. Civil Dark: 20:12 - 06:57. Nautical Dark: 20:51 - 06:18. Astro Dark: 21:34 - 05:38

Total Clouds (% Sky Obscured)

70
58
55
49
52
45
33
25
44
64
83
81
78
76
78
78
79
78
81
84
88
92
94
79

Low Clouds (% Sky Obscured)

52
47
38
35
29
21
9
0
24
50
74
64
57
57
59
59
56
59
69
72
67
63
56
51

Medium Clouds (% Sky Obscured)

45
0
1
1
6
5
33
25
44
53
59
64
68
73
70
55
55
59
33
33
39
40
41
37

High Clouds (% Sky Obscured)

25
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
3
4
3

ISS Passover

Visibility (miles)

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

Precipitation Probability (%)

33
22
12
13
10
11
12
11
8
24
34
38
46
42
21
2
1
3
4
3
4
5
0
1

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0.4
0.3
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

14
13
12
12
11
10
10
10
9
9
9
9
10
11
13
14
15
16
17
17
17
16
15
14

Feels Like (°C)

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

Dew Point (°C)

11
10
8
8
7
6
5
5
5
5
5
4
6
8
9
9
7
6
5
4
4
3
3
3

Relative Humidity (%)

80
80
76
77
76
74
73
73
73
74
74
74
76
77
79
70
59
51
45
43
42
41
43
45

Pressure (mb)

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

Ozone (du)

284
283
283
283
284
287
289
289
290
292
296
299
300
302
305
307
307
308
309
308
308
309
311
313

Monday 22

Waxing Crescent 3%

09:17

19:51

21 Bad
22 OK
23 OK
00 OK
01 OK
02 Bad
03 OK
04 OK
05 OK
06 OK
07 OK
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

Sun - Rise: 07:31, Set: 19:37, Transit: 13:34. Moon - Rise: 09:17, Set: 19:51. Civil Dark: 20:10 - 06:58. Nautical Dark: 20:49 - 06:20. Astro Dark: 21:31 - 05:40

Total Clouds (% Sky Obscured)

60
33
36
43
46
49
48
48
44
43
42
60
62
62
59
52
46
49
58
66
81
91
100
92

Low Clouds (% Sky Obscured)

42
28
25
21
19
20
21
23
27
31
34
30
40
53
59
52
46
49
58
59
65
74
83
77

Medium Clouds (% Sky Obscured)

24
17
20
22
22
24
26
27
24
16
13
60
62
30
20
20
15
15
10
11
11
7
13
11

High Clouds (% Sky Obscured)

1
0
0
0
0
0
0
0
0
0
0
0
0
0
33
52
46
49
58
66
81
91
100
68

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

Precipitation Probability (%)

1
0
0
0
0
0
0
0
0
0
0
34
38
34
37
33
28
56
72
84
83
79
72
59

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

13
12
11
11
10
10
9
9
8
8
8
8
10
11
13
14
15
16
16
17
17
16
14
13

Feels Like (°C)

10
9
9
9
9
9
8
8
8
8
7
7
7
8
8
9
9
10
15
14
14
14
14
14

Dew Point (°C)

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

Relative Humidity (%)

51
58
63
68
72
73
73
74
74
74
75
74
66
59
53
48
43
40
41
42
43
48
54
62

Pressure (mb)

1021
1022
1022
1022
1022
1022
1022
1023
1022
1023
1023
1023
1022
1022
1022
1021
1021
1020
1020
1020
1020
1020
1020
1020

Ozone (du)

314
313
313
314
313
313
313
313
313
315
315
314
313
312
311
310
309
308
307
306
305
304
303
302

Tuesday 23

Waxing Crescent 7%

10:29

20:04

21 Bad
22 Bad
23 Bad
00 Bad
01 Bad
02 OK
03 OK
04 OK
05 OK
06 OK
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

Sun - Rise: 07:33, Set: 19:35, Transit: 13:34. Moon - Rise: 10:29, Set: 20:04. Civil Dark: 20:08 - 07:00. Nautical Dark: 20:46 - 06:21. Astro Dark: 21:29 - 05:41

Total Clouds (% Sky Obscured)

85
78
72
62
52
44
42
40
40
45
54
62
75
81
89
95
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

68
56
30
21
9
7
12
17
21
25
29
34
35
46
45
35
27
27
33
33
30
28
26
30

Medium Clouds (% Sky Obscured)

10
9
8
10
10
8
9
10
5
5
5
5
4
8
13
23
30
30
35
30
30
30
30
24

High Clouds (% Sky Obscured)

36
2
11
21
32
44
42
40
40
45
54
62
75
81
89
93
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
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 (%)

46
32
26
20
6
7
6
1
4
4
2
4
4
2
4
5
3
10
16
18
27
28
29
24

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

63
66
70
68
67
66
66
67
67
68
70
72
62
55
48
44
39
36
36
36
36
39
44
48

Pressure (mb)

1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
1021
1021
1021
1021
1020
1020
1020
1020
1020
1020
1021
1021

Ozone (du)

301
300
298
297
296
296
296
297
298
298
299
300
300
300
301
301
301
301
301
301
302
302
302
302

Wednesday 24

Waxing Crescent 13%

11:42

20:20

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

Sun - Rise: 07:34, Set: 19:33, Transit: 13:34. Moon - Rise: 11:42, Set: 20:20. Civil Dark: 20:06 - 07:01. Nautical Dark: 20:44 - 06:23. Astro Dark: 21:26 - 05:43

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
94
88
83
86
90
93
86
79
72

Low Clouds (% Sky Obscured)

35
37
30
25
20
22
24
26
33
37
48
47
47
44
47
47
42

Medium Clouds (% Sky Obscured)

27
30
33
22
13
26
42
51
41
21
12
8
5
2
3
3
3

High Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
94
88
83
86
75
65
53
43
27

ISS Passover

Visibility (miles)

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

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

19
4
9
5
0
2
2
1
3
4
2
2
1
0
1
0
0

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

53
58
63
66
69
73
76
78
81
82
84
85
74
66
58
49
41

Pressure (mb)

1022
1022
1023
1023
1023
1023
1023
1023
1023
1023
1024
1024
1024
1024
1025
1024
1024

Ozone (du)

302
301
301
300
300
300
300
301
301
302
302
303
303
303
303
303
303

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

Generated: 18/09/25 21:02:28. Forecast: 18/09/25 to 24/09/25. Timezone: UTC+2.00