Clear Outside v1.0 - International Weather Forecasts For Astronomers

Thursday 18

Waning Crescent 12%

04:17

18:55

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
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad

Sun - Rise: 07:22, Set: 19:49, Transit: 13:35. Moon - Rise: 04:17, Set: 18:55. Civil Dark: 20:23 - 06:48. Nautical Dark: 21:03 - 06:08. Astro Dark: 21:45 - 05:27

Total Clouds (% Sky Obscured)

99
99
100
92
95
92
94
91
92
81
79
86
100
98
76
50
52
47
51
49
62
80
79
81

Low Clouds (% Sky Obscured)

94
99
87
89
90
85
91
86
88
60
72
76
69
53
38
49
47
47
43
46
62
64
71
73

Medium Clouds (% Sky Obscured)

43
42
51
31
31
32
35
35
39
27
30
29
19
6
5
0
5
2
13
5
0
22
0
2

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
1
2
90
85
56
4
17
20
23
20
8
20
45
51

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
5
24
15
9
10
2
5
6
5
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
15
14
13
14
14
15
15
15
14
14
14
14
14
12
11
11
10
10
9
8
8
8
7

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

16
16
16
16
16
17
17
17
17
16
16
15
15
14
15
14
14
14
15
14
14
14
14
14

Relative Humidity (%)

88
89
88
88
86
88
86
84
80
79
73
70
68
70
76
77
78
81
85
83
86
89
89
89

Pressure (mb)

1017
1017
1018
1018
1019
1019
1019
1020
1020
1020
1020
1020
1020
1020
1020
1021
1021
1021
1021
1021
1021
1021
1021
1021

Ozone (du)

262
260
258
256
256
256
257
257
259
259
258
258
259
259
258
258
257
257
256
255
256
257
257
257

Friday 19

Waning Crescent 6%

05:36

19:08

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

Sun - Rise: 07:24, Set: 19:46, Transit: 13:35. Moon - Rise: 05:36, Set: 19:08. Civil Dark: 20:20 - 06:50. Nautical Dark: 21:00 - 06:10. Astro Dark: 21:43 - 05:29

Total Clouds (% Sky Obscured)

75
62
59
41
11
11
17
78
74
83
55
51
93
85
94
83
4
73
1
40
42
92
88
100

Low Clouds (% Sky Obscured)

68
47
23
0
0
8
12
18
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

11
7
2
2
0
0
0
0
0
0
1
0
0
1
22
34
4
73
1
40
32
26
78
99

High Clouds (% Sky Obscured)

40
28
37
41
10
5
7
77
74
83
36
51
93
85
94
81
0
1
1
0
1
91
88
95

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

Chance of Frost

Temperature (°C)

15
15
15
16
18
20
22
24
26
26
27
27
26
25
23
21
21
20
19
19
18
18
18
18

Feels Like (°C)

14
14
16
17
19
21
23
24
25
26
25
26
25
24
21
20
19
19
17
18
17
18
18
17

Dew Point (°C)

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

Relative Humidity (%)

90
87
89
82
72
65
59
48
39
36
34
38
42
47
48
48
46
47
51
53
56
57
58
57

Pressure (mb)

1021
1021
1022
1022
1022
1022
1021
1021
1020
1019
1019
1018
1018
1017
1017
1017
1017
1017
1017
1016
1016
1016
1015
1015

Ozone (du)

257
257
257
256
256
255
254
254
254
254
255
255
254
254
254
254
253
254
254
254
253
255
255
255

Saturday 20

Waning Crescent 2%

No Rise

19:19

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
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad

Sun - Rise: 07:25, Set: 19:44, Transit: 13:35. Moon - Rise: No Rise, Set: 19:19. Civil Dark: 20:18 - 06:52. Nautical Dark: 20:58 - 06:11. Astro Dark: 21:40 - 05:31

Total Clouds (% Sky Obscured)

97
86
98
50
78
50
100
100
100
100
100
100
100
100
92
100
84
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
3
9
44
78
87
44
36
30
57
50
46
46
48
45
42

Medium Clouds (% Sky Obscured)

72
34
41
36
67
50
95
99
100
93
60
72
94
82
22
23
18
33
51
47
41
50
10
22

High Clouds (% Sky Obscured)

92
65
98
10
17
14
100
100
100
100
100
100
100
100
87
100
68
100
100
100
100
100
100
100

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
6
9
6
7
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
Very Light Rain
Light Rain
Light Rain
Moderate Rain
Light Rain
Light Rain
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

0
0
0
1
0
1
1
3
12
63
85
95
95
95
54
3
1
0
0
2
0
3
2
2

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0.2
0.4
1.1
3.2
1.1
0.4
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

6
6
6
6
7
9
11
12
13
14
10
6
4
6
3
3
3
3
4
4
5
5
6
7

Chance of Frost

Temperature (°C)

18
18
18
19
21
23
25
26
25
25
25
23
23
21
20
19
19
18
18
17
17
16
16
15

Feels Like (°C)

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

Dew Point (°C)

10
11
12
13
13
13
12
12
11
16
21
22
23
20
19
19
18
17
17
17
16
16
15
15

Relative Humidity (%)

60
63
66
66
60
50
42
41
40
55
80
89
95
96
95
95
96
96
98
96
96
98
98
98

Pressure (mb)

1014
1014
1013
1013
1013
1012
1012
1012
1012
1012
1011
1010
1010
1011
1012
1012
1012
1012
1012
1012
1012
1012
1012
1011

Ozone (du)

255
254
253
252
251
250
248
248
247
247
248
250
252
252
254
256
255
255
255
256
257
257
257
257

Sunday 21

New Moon 0%

06:52

19:28

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
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad

Sun - Rise: 07:27, Set: 19:42, Transit: 13:34. Moon - Rise: 06:52, Set: 19:28. Civil Dark: 20:15 - 06:53. Nautical Dark: 20:55 - 06:13. Astro Dark: 21:37 - 05:33

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
100
100
89
75
63
59
55
53
49
45
45
36

Low Clouds (% Sky Obscured)

39
36
47
52
68
67
64
58
41
45
44
44
45
40
44
49
51
45
40
34
32
29
27
22

Medium Clouds (% Sky Obscured)

81
98
98
99
100
99
99
98
91
81
68
67
47
63
14
13
36
49
55
53
49
45
45
36

High Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
100
100
67
34
0
0
0
0
0
0
0
0

ISS Passover

Visibility (miles)

9
9
6
2
0
0
1
7
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
Light Rain
Light Rain
Light Rain
Very Light Rain
Light Rain
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
Very Light Rain

Precipitation Probability (%)

8
47
95
95
95
67
74
34
3
0
0
0
1
1
3
4
2
6
8
5
27
37
24
66

Precipitation Amount (mm)

0
0
0.6
1.1
1.2
0.2
0.4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.2

Wind Speed/Direction (mph)

8
6
7
7
8
7
11
10
12
11
10
9
7
6
4
4
4
4
2
2
2
4
3
2

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

96
96
98
98
98
98
95
90
78
77
76
75
75
77
78
83
84
86
84
84
81
86
86
86

Pressure (mb)

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

Ozone (du)

258
259
259
260
261
263
264
263
265
267
267
268
269
271
271
271
272
272
271
272
272
273
274
273

Monday 22

Waxing Crescent 1%

08:06

19:38

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

Sun - Rise: 07:29, Set: 19:39, Transit: 13:34. Moon - Rise: 08:06, Set: 19:38. Civil Dark: 20:13 - 06:55. Nautical Dark: 20:53 - 06:15. Astro Dark: 21:35 - 05:35

Total Clouds (% Sky Obscured)

33
30
31
38
40
50
67
82
84
86
89
70
52
37
37
47
57
66
76
87
85
82
82
77

Low Clouds (% Sky Obscured)

18
10
18
21
29
35
48
58
64
71
76
61
42
22
6
8
11
14
18
26
27
36
38
34

Medium Clouds (% Sky Obscured)

33
30
31
38
40
35
36
33
37
38
40
29
21
21
32
43
51
51
53
57
48
39
30
21

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
1
9
13
15
11
6
1
7
14
27
27

ISS Passover

Visibility (miles)

4
4
9
7
9
9
8
8
9
9
9
9
9
9
9
9
9
9
9
9
9
9
8
7

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

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

Precipitation Probability (%)

95
71
82
64
33
38
41
38
31
23
9
12
13
5
16
17
19
22
24
25
31
39
46
44

Precipitation Amount (mm)

0.9
0.3
0.4
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
2
2
2
1
3
4
5
7
8
8
9
9
8
7
7
6
6
6
6
6
6
6
6

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

90
96
96
96
90
87
79
68
73
83
85
82
78
76
75
75
75
76
76
78
78
80
81
84

Pressure (mb)

1013
1014
1014
1015
1015
1016
1016
1016
1016
1016
1016
1016
1017
1017
1017
1018
1018
1018
1018
1018
1018
1018
1018
1018

Ozone (du)

274
276
279
280
284
287
288
288
289
290
292
293
294
295
295
298
300
303
304
305
306
306
306
307

Tuesday 23

Waxing Crescent 3%

09:19

19:47

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
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad

Sun - Rise: 07:30, Set: 19:37, Transit: 13:34. Moon - Rise: 09:19, Set: 19:47. Civil Dark: 20:11 - 06:57. Nautical Dark: 20:50 - 06:17. Astro Dark: 21:32 - 05:37

Total Clouds (% Sky Obscured)

72
69
79
90
100
96
92
89
93
97
100
100
100
100
100
99
98
94
92
89
81
77
84
88

Low Clouds (% Sky Obscured)

34
26
31
32
42
48
53
55
46
39
30
44
57
72
74
77
79
70
59
48
51
55
53
63

Medium Clouds (% Sky Obscured)

10
8
17
17
25
27
32
31
44
53
69
79
88
100
91
81
72
75
84
88
81
77
79
73

High Clouds (% Sky Obscured)

27
28
19
10
2
11
20
29
53
76
100
99
99
99
100
96
95
94
92
89
81
77
84
88

ISS Passover

Visibility (miles)

8
9
9
9
9
9
9
9
9
9
9
9
9
9
9
8
7
6
7
7
8
8
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
Very Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain

Precipitation Probability (%)

40
35
36
34
31
31
31
29
30
28
22
59
78
93
95
95
95
95
95
95
95
95
95
95

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0.2
0.5
0.7
0.9
1.1
1.4
1.4
1.7
2.2
1.1
1.1
1.5
0.8

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

12
12
12
12
12
12
13
13
13
14
15
15
14
13
12
12
12
12
11
11
11
11
10
10

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

87
87
90
89
89
89
86
82
79
71
62
54
61
70
79
76
75
75
76
79
81
83
84
85

Pressure (mb)

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

Ozone (du)

307
307
308
308
308
308
308
307
306
307
307
307
309
311
312
316
319
322
323
324
326
325
324
323

Wednesday 24

Waxing Crescent 7%

10:33

19:59

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
01 Bad

Sun - Rise: 07:32, Set: 19:35, Transit: 13:33. Moon - Rise: 10:33, Set: 19:59. Civil Dark: 20:08 - 06:58. Nautical Dark: 20:48 - 06:19. Astro Dark: 21:29 - 05:39

Total Clouds (% Sky Obscured)

81
74
66
63
60
58
57
55
65
74
82
81
83
85
76
68
56
59
63
66

Low Clouds (% Sky Obscured)

74
74
66
63
60
58
57
55
65
74
78
76
80
82
76
68
56
59
63
62

Medium Clouds (% Sky Obscured)

72
60
55
55
46
46
46
52
56
55
60
52
43
35
22
11
2
2
2
2

High Clouds (% Sky Obscured)

81
74
66
63
60
58
57
55
65
71
80
54
27
0
0
0
0
0
0
0

ISS Passover

Visibility (miles)

9
9
9
8
8
7
8
8
9
9
8
8
8
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

Precipitation Type

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

Precipitation Probability (%)

81
79
60
40
22
24
25
26
26
26
24
34
36
33
37
27
13
19
25
29

Precipitation Amount (mm)

0.5
0.5
0.3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

83
80
78
70
64
58
52
47
43
46
50
53
59
64
71
69
65
64
67
71

Pressure (mb)

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

Ozone (du)

321
319
318
317
316
315
313
312
310
308
306
304
303
302
301
300
299
298
298
298

Forecast for Leiden, Gemeente Leiden, Netherlands (52.16,4.50)

Generated: 18/09/25 06:03:39. Forecast: 18/09/25 to 24/09/25. Timezone: UTC+2.00