Clear Outside v1.0 - International Weather Forecasts For Astronomers

Monday 7

Waning Crescent 18%

03:06

18:55

03 OK
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 OK
12 Good
13 Good
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

Sun - Rise: 07:04, Set: 20:15, Transit: 13:39. Moon - Rise: 03:06, Set: 18:55. Civil Dark: 20:50 - 06:29. Nautical Dark: 21:32 - 05:47. Astro Dark: 22:18 - 05:01

Total Clouds (% Sky Obscured)

44
56
65
68
86
78
77
99
30
5
4
97
97
92
100
100
99
91
100
100
99
99
100
100

Low Clouds (% Sky Obscured)

18
0
0
0
2
0
0
0
0
0
0
19
22
29
22
24
21
20
30
68
47
42
36
46

Medium Clouds (% Sky Obscured)

44
33
31
32
86
28
19
11
8
5
0
0
7
15
15
30
20
82
12
48
64
94
98
94

High Clouds (% Sky Obscured)

25
56
22
22
48
39
62
98
18
2
4
97
96
92
100
100
94
67
100
100
95
94
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 (%)

1
0
1
10
0
1
0
0
0
0
0
0
0
0
1
5
11
20
9
14
7
19
28
26

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
5
5
5
8
8
8
9
11
14
14
12
13
10
11
11
10
9
10
10
10

Chance of Frost

Temperature (°C)

17
18
17
17
17
17
19
21
23
24
26
25
25
24
23
22
21
21
20
20
20
19
19
19

Feels Like (°C)

16
16
16
16
15
16
17
19
21
23
25
24
22
22
22
20
20
20
19
19
19
19
18
17

Dew Point (°C)

8
7
8
8
7
7
8
9
9
8
8
9
11
13
13
14
16
17
17
17
16
17
16
16

Relative Humidity (%)

52
50
52
53
51
51
51
46
40
34
33
35
42
51
51
60
69
77
81
84
81
85
85
84

Pressure (mb)

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

Ozone (du)

296
296
297
298
299
298
297
298
298
300
301
299
297
296
294
294
295
294
294
294
294
293
292
291

Tuesday 8

Waning Crescent 10%

03:06

19:17

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
01 OK
02 Bad

Sun - Rise: 07:05, Set: 20:13, Transit: 13:39. Moon - Rise: 03:06, Set: 19:17. Civil Dark: 20:47 - 06:31. Nautical Dark: 21:29 - 05:49. Astro Dark: 22:15 - 05:03

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
95
91
89
59
57
68
40
25
43

Low Clouds (% Sky Obscured)

21
35
19
24
32
60
65
73
75
89
88
82
76
73
76
80
69
42
34
55
65
28
22
32

Medium Clouds (% Sky Obscured)

92
95
97
98
41
96
100
100
100
100
100
100
100
99
100
95
17
20
0
2
0
9
0
5

High Clouds (% Sky Obscured)

100
99
100
100
100
100
100
100
100
100
100
99
100
100
100
15
12
16
20
25
25
0
0
0

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
8
3
4
3
3
3
4
3
7
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
Very Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Very Light Rain
None
None
None
None
None
None
None

Precipitation Probability (%)

16
1
0
2
16
31
61
84
95
95
95
95
95
87
87
80
47
23
6
18
5
4
14
14

Precipitation Amount (mm)

0
0
0
0
0
0
0.3
0.5
0.9
1.2
1.4
1.3
0.9
0.5
0.5
0.7
0.2
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

10
11
11
11
11
11
12
10
11
10
9
12
11
10
10
11
12
9
5
6
6
6
7
7

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

16
16
15
14
13
12
12
12
12
14
15
15
15
15
15
15
14
12
12
12
12
11
8
8

Relative Humidity (%)

85
83
81
77
74
72
70
68
73
86
92
92
93
95
93
90
87
79
82
80
82
78
66
68

Pressure (mb)

1012
1012
1011
1011
1011
1010
1010
1010
1010
1009
1009
1009
1008
1008
1008
1007
1007
1007
1007
1007
1008
1007
1007
1007

Ozone (du)

292
292
291
292
293
294
293
294
296
296
297
296
296
300
303
308
308
313
319
319
321
328
334
331

Wednesday 9

Waning Crescent 4%

04:36

19:33

03 OK
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
01 OK
02 Bad

Sun - Rise: 07:07, Set: 20:10, Transit: 13:39. Moon - Rise: 04:36, Set: 19:33. Civil Dark: 20:45 - 06:33. Nautical Dark: 21:27 - 05:51. Astro Dark: 22:12 - 05:06

Total Clouds (% Sky Obscured)

35
37
39
61
56
63
87
85
86
89
87
88
69
61
57
57
64
65
61
48
46
39
37
45

Low Clouds (% Sky Obscured)

28
35
37
61
56
63
76
73
76
80
80
78
52
43
39
41
48
54
53
41
35
30
27
32

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
12
8
11
11
15
10
15
12
13
13
14
11
7
2
2
2
2
5

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
9
0
0
0
0
0
0
0
0
0
0
0
0
0
18

ISS Passover

Visibility (miles)

9
8
9
7
9
9
7
3
6
9
7
7
5
4
6
9
9
7
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
Very Light Rain
Light Rain
Very Light Rain
Light Rain
Light Rain
Light Rain
Very Light Rain
Light Rain
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

19
29
37
41
38
43
66
75
64
67
73
75
66
63
46
38
43
37
29
26
23
14
5
10

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

9
10
11
11
12
13
13
14
15
14
14
13
14
14
14
12
11
9
7
5
4
4
4
4

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

70
71
74
73
75
69
67
68
73
75
73
75
73
71
72
71
71
73
78
80
83
83
82
80

Pressure (mb)

1007
1007
1007
1007
1007
1008
1008
1009
1010
1010
1011
1012
1012
1013
1013
1014
1014
1015
1015
1016
1016
1016
1017
1017

Ozone (du)

332
335
338
340
345
348
350
353
353
354
356
352
342
338
337
336
334
335
335
333
329
329
327
323

Thursday 10

Waning Crescent 1%

06:04

19:46

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

Sun - Rise: 07:09, Set: 20:08, Transit: 13:38. Moon - Rise: 06:04, Set: 19:46. Civil Dark: 20:42 - 06:34. Nautical Dark: 21:24 - 05:53. Astro Dark: 22:09 - 05:08

Total Clouds (% Sky Obscured)

56
70
100
100
100
100
99
99
94
88
84
84
84
84
60
38
39
55
89
97
98
99
100
100

Low Clouds (% Sky Obscured)

37
40
30
22
19
32
37
44
65
48
34
54
61
46
44
21
13
15
40
5
48
64
52
28

Medium Clouds (% Sky Obscured)

6
8
11
6
5
4
2
0
24
47
84
84
82
78
23
13
18
16
11
6
12
15
15
68

High Clouds (% Sky Obscured)

38
69
100
100
100
99
97
96
81
66
40
11
48
18
2
0
0
22
47
93
96
98
100
100

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
5
7
7
9
9
9
9
9
8
6
6
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
Very Light Rain
Very Light Rain
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

9
11
19
20
27
30
20
20
31
33
30
34
45
40
31
9
0
0
2
16
35
37
31
30

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0.3
0.2
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

5
5
5
5
5
5
7
8
9
10
11
11
11
10
10
10
7
6
5
5
5
7
7
7

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

80
81
83
81
84
86
84
81
76
67
61
56
59
61
64
71
70
71
73
76
83
82
82
86

Pressure (mb)

1017
1017
1017
1017
1017
1017
1017
1017
1017
1018
1018
1018
1018
1018
1017
1017
1017
1017
1017
1017
1017
1017
1017
1017

Ozone (du)

321
319
317
315
314
313
313
312
312
310
311
312
312
313
316
317
314
308
306
303
302
301
301
301

Friday 11

New Moon 0%

07:27

19:57

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 OK
22 OK
23 Bad
00 Bad
01 Bad
02 Bad

Sun - Rise: 07:10, Set: 20:06, Transit: 13:38. Moon - Rise: 07:27, Set: 19:57. Civil Dark: 20:40 - 06:36. Nautical Dark: 21:21 - 05:55. Astro Dark: 22:06 - 05:10

Total Clouds (% Sky Obscured)

100
100
100
93
83
100
100
96
67
86
85
79
70
63
62
47
42
38
30
30
34
38
41
57

Low Clouds (% Sky Obscured)

31
61
64
52
49
80
90
95
51
72
65
50
36
21
22
22
23
26
29
30
34
38
41
42

Medium Clouds (% Sky Obscured)

100
100
100
70
28
26
22
15
17
10
10
10
6
1
1
5
0
0
0
1
3
1
1
1

High Clouds (% Sky Obscured)

100
100
100
85
83
57
30
0
0
0
0
0
0
0
6
11
15
9
2
0
1
1
2
26

ISS Passover

Visibility (miles)

9
8
5
3
5
4
3
5
5
7
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
Light Rain
Light Rain
Light Rain
Light Rain
Very Light Rain
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

39
52
71
80
75
72
71
71
68
64
37
54
50
41
40
34
14
25
21
10
26
19
15
24

Precipitation Amount (mm)

0
0
0.4
0.6
0.5
0.5
0.5
0.5
0.4
0.3
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

8
8
8
8
8
8
9
9
9
9
9
8
8
8
8
7
6
4
4
4
4
3
2
2

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

13
13
13
13
13
13
13
14
14
15
17
18
19
19
20
20
21
20
17
17
18
18
18
18

Dew Point (°C)

12
13
13
13
13
13
13
13
13
13
13
13
13
14
14
14
14
14
14
14
13
13
13
13

Relative Humidity (%)

84
87
89
89
89
90
87
87
85
81
78
73
71
70
70
73
78
83
85
86
86
87
87
89

Pressure (mb)

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

Ozone (du)

301
300
301
301
303
304
308
309
311
313
313
313
313
314
314
313
312
310
310
310
310
310
310
310

Saturday 12

Waxing Crescent 2%

08:49

20:08

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
01 Bad
02 Bad

Sun - Rise: 07:12, Set: 20:03, Transit: 13:38. Moon - Rise: 08:49, Set: 20:08. Civil Dark: 20:38 - 06:38. Nautical Dark: 21:19 - 05:56. Astro Dark: 22:03 - 05:12

Total Clouds (% Sky Obscured)

71
88
74
60
45
56
68
79
85
92
98
95
93
90
92
94
95
95
95
96
97
98
99
99

Low Clouds (% Sky Obscured)

39
32
22
16
11
11
17
15
15
18
16
14
22
25
28
28
31
39
46
54
51
48
48
64

Medium Clouds (% Sky Obscured)

1
1
0
0
0
0
0
0
2
4
8
9
13
15
19
24
27
28
28
31
45
59
73
80

High Clouds (% Sky Obscured)

50
75
64
48
29
35
48
70
78
86
95
86
77
65
72
79
80
80
87
94
97
97
97
98

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
8
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 (%)

16
6
19
15
15
19
13
2
8
4
0
0
0
0
0
0
0
0
1
1
6
13
23
37

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
4
4
4
4
5
7
9
9
10
11
11
12
12
11
10
9
10
11
11
11
11
11

Chance of Frost

Temperature (°C)

14
14
14
14
14
14
16
17
19
20
20
21
21
21
21
20
19
18
18
18
17
17
17
17

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

89
89
90
89
89
89
82
76
70
59
51
43
46
50
53
58
65
73
73
73
74
78
83
87

Pressure (mb)

1022
1022
1022
1022
1022
1022
1022
1022
1022
1022
1022
1022
1022
1021
1021
1021
1020
1020
1020
1020
1020
1019
1019
1018

Ozone (du)

309
309
309
308
307
306
303
300
297
296
294
293
293
293
292
294
295
296
296
295
294
295
296
296

Sunday 13

Waxing Crescent 7%

10:09

20:21

Sun - Rise: 07:14, Set: 20:01, Transit: 13:37. Moon - Rise: 10:09, Set: 20:21. Civil Dark: 20:35 - 06:39. Nautical Dark: 21:16 - 05:58. Astro Dark: 22:00 - 05:14

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 Leiden, Gemeente Leiden, Netherlands (52.16,4.50)

Generated: 07/09/26 02:56:58. Forecast: 07/09/26 to 13/09/26. Timezone: UTC+2.00