Clear Outside v1.0 - International Weather Forecasts For Astronomers

Friday 21

Waxing Crescent 2%

10:00

16:39

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

Sun - Rise: 08:13, Set: 16:42, Transit: 12:28. Moon - Rise: 10:00, Set: 16:39. Civil Dark: 17:20 - 07:35. Nautical Dark: 18:02 - 06:53. Astro Dark: 18:42 - 06:13

Total Clouds (% Sky Obscured)

87
87
79
77
46
40
36
27
36
5
0
19
22
21
23
46
18
5
38
42
66
83
94
86

Low Clouds (% Sky Obscured)

65
61
52
44
46
40
36
27
36
5
0
0
0
0
23
37
18
0
0
0
38
51
70
72

Medium Clouds (% Sky Obscured)

26
9
25
55
46
10
0
0
0
3
0
11
11
21
23
46
18
5
17
19
23
26
6
4

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
1
3
2
2
3
9
10
15
42
64
53

ISS Passover

Visibility (miles)

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

Fog (%)

100
100
100
99
97
90
90
88
0
0
0
0
0
0
0
0
10
10
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
Very Light Rain
None

Precipitation Probability (%)

3
3
3
2
0
0
0
0
1
0
1
2
5
7
19
27
23
26
31
36
34
44
45
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
0.2
0

Wind Speed/Direction (mph)

7
8
8
8
9
8
6
5
4
3
2
0
2
3
4
5
5
6
7
7
6
7
7
6

Chance of Frost

Temperature (°C)

2
2
2
2
1
1
-0
-0
1
2
4
5
5
5
5
3
2
2
1
1
1
1
2
2

Feels Like (°C)

-2
-3
-3
-2
-3
-4
-4
-2
-0
1
4
5
5
4
3
1
-1
-2
-3
-3
-2
-2
-2
-1

Dew Point (°C)

1
-1
-0
1
-1
-1
-2
-2
-1
-1
-1
-1
-2
-2
-2
-2
-3
-3
-3
-3
-2
-2
-2
-2

Relative Humidity (%)

93
86
88
91
89
88
89
91
86
79
72
66
61
60
65
69
72
74
76
77
78
80
78
77

Pressure (mb)

1016
1017
1018
1019
1020
1021
1022
1023
1024
1024
1025
1025
1025
1025
1025
1025
1025
1025
1026
1026
1026
1026
1026
1025

Ozone (du)

311
314
316
316
316
321
327
320
314
310
308
308
307
304
299
295
294
295
297
296
292
290
285
278

Saturday 22

Waxing Crescent 5%

11:02

17:23

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
01 Bad

Sun - Rise: 08:15, Set: 16:41, Transit: 12:28. Moon - Rise: 11:02, Set: 17:23. Civil Dark: 17:19 - 07:37. Nautical Dark: 18:01 - 06:54. Astro Dark: 18:42 - 06:14

Total Clouds (% Sky Obscured)

93
80
91
98
98
100
95
100
100
100
88
97
90
72
100
100
89
97
93
100
100
100
100
100

Low Clouds (% Sky Obscured)

74
46
38
0
0
0
0
27
34
22
0
0
0
0
0
17
70
86
82
83
81
83
88
88

Medium Clouds (% Sky Obscured)

4
3
56
89
95
95
95
100
97
88
88
97
90
72
100
100
89
95
77
92
97
65
49
71

High Clouds (% Sky Obscured)

61
73
87
94
95
100
61
100
100
100
0
0
6
5
95
14
1
2
14
23
95
79
95
94

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
2
0
9
5
5

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
Very Light Rain
Snow
None
None
None
None

Precipitation Probability (%)

4
1
1
0
1
0
0
13
5
8
4
2
1
0
1
4
11
44
57
66
51
43
46
40

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.2
0.4
0
0
0
0

Wind Speed/Direction (mph)

5
6
6
6
8
8
9
10
11
11
12
13
13
14
13
13
13
13
14
14
14
15
14
14

Chance of Frost

Temperature (°C)

2
2
2
2
2
2
2
2
3
3
4
4
5
4
4
3
3
3
3
2
2
2
2
1

Feels Like (°C)

-1
-1
0
-0
-2
-3
-3
-3
-2
-2
-1
-1
-2
-1
-2
-2
-3
-3
-3
-4
-4
-4
-4
-4

Dew Point (°C)

-2
-3
-2
-2
-2
-2
-2
-2
-2
-3
-2
-3
-3
-4
-5
-5
-4
-4
-2
-1
-1
-1
1
1

Relative Humidity (%)

73
72
73
74
74
76
80
78
72
67
64
61
57
54
54
56
60
62
69
83
81
80
94
94

Pressure (mb)

1025
1025
1025
1024
1024
1024
1024
1024
1024
1023
1023
1022
1021
1020
1019
1019
1018
1017
1017
1016
1016
1015
1014
1014

Ozone (du)

273
272
273
273
273
272
270
260
257
260
267
273
275
276
280
281
281
276
277
279
280
280
278
277

Sunday 23

Waxing Crescent 10%

11:51

18:21

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
01 Bad

Sun - Rise: 08:17, Set: 16:39, Transit: 12:28. Moon - Rise: 11:51, Set: 18:21. Civil Dark: 17:18 - 07:38. Nautical Dark: 18:00 - 06:56. Astro Dark: 18:41 - 06:15

Total Clouds (% Sky Obscured)

100
100
100
100
100
97
100
100
100
100
94
100
100
100
100
100
100
100
100
100
100
100
100
99

Low Clouds (% Sky Obscured)

98
95
91
95
98
89
100
100
100
98
91
100
100
100
100
100
92
79
73
72
79
84
94
89

Medium Clouds (% Sky Obscured)

72
94
100
100
98
91
82
62
100
68
70
83
98
72
47
0
50
50
50
53
52
52
40
35

High Clouds (% Sky Obscured)

100
100
100
98
75
8
30
10
90
4
2
3
31
37
0
0
50
50
60
60
70
78
82
78

ISS Passover

Visibility (miles)

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

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

Precipitation Probability (%)

59
67
62
63
63
51
27
12
13
49
61
63
79
70
75
41
35
47
40
36
53
56
51
54

Precipitation Amount (mm)

0.2
0.3
0.3
0.3
0.3
0.2
0
0
0
0
0.2
0.3
0.5
0
0.4
0
0
0.2
0
0
0.3
0.3
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-4
-5
-4
-4
-5
-4
-4
-4
-4
-4
-4
-4
-3
-3
-3
-1
-0
0
1
2
2
2
3
3

Dew Point (°C)

0
-1
-2
-1
-2
-1
-1
-1
-1
-0
-0
-0
-0
1
1
3
3
4
4
4
5
5
5
5

Relative Humidity (%)

93
88
83
86
84
86
89
89
86
86
85
83
82
85
85
89
91
90
90
93
93
94
94
94

Pressure (mb)

1013
1012
1011
1011
1010
1009
1008
1007
1006
1005
1004
1002
1001
999
998
998
997
996
996
995
995
994
994
993

Ozone (du)

279
278
271
270
269
270
271
270
273
274
273
273
274
274
274
277
278
279
278
280
281
280
279
280

Monday 24

Waxing Crescent 16%

12:28

19:30

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
01 Bad

Sun - Rise: 08:18, Set: 16:38, Transit: 12:28. Moon - Rise: 12:28, Set: 19:30. Civil Dark: 17:17 - 07:39. Nautical Dark: 18:00 - 06:57. Astro Dark: 18:40 - 06:17

Total Clouds (% Sky Obscured)

97
96
90
93
94
89
84
79
86
91
97
94
90
87
82
76
72
71
70
71
65
62
60
61

Low Clouds (% Sky Obscured)

91
86
77
88
89
82
73
68
68
68
70
66
62
59
57
55
53
57
60
64
59
55
48
54

Medium Clouds (% Sky Obscured)

66
81
48
19
19
15
12
17
60
42
93
90
86
83
77
73
71
62
31
30
33
26
40
40

High Clouds (% Sky Obscured)

70
47
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

ISS Passover

Visibility (miles)

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

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

Precipitation Probability (%)

57
56
56
45
36
40
35
14
23
25
33
31
37
50
58
46
27
31
31
20
30
36
30
17

Precipitation Amount (mm)

0.2
0
0.2
0
0
0
0
0
0
0
0
0
0
0.2
0.4
0.2
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

7
7
7
8
8
8
8
8
9
9
10
9
8
8
6
6
4
4
5
5
5
5
5
5

Chance of Frost

Temperature (°C)

6
6
6
6
6
6
6
6
6
7
7
7
7
7
7
6
6
5
5
5
5
5
5
5

Feels Like (°C)

3
3
2
3
2
2
2
2
2
3
3
4
4
4
4
3
4
3
3
3
3
3
3
3

Dew Point (°C)

5
5
5
5
5
5
4
4
4
5
5
5
4
4
5
4
4
4
4
4
4
4
4
4

Relative Humidity (%)

94
96
96
96
93
93
91
90
88
87
84
84
81
81
88
87
88
88
90
91
93
91
93
93

Pressure (mb)

992
992
991
991
991
991
991
991
992
992
992
993
993
993
993
994
995
995
996
997
997
997
998
998

Ozone (du)

282
284
285
289
293
296
297
298
297
297
297
298
300
302
303
302
303
305
305
306
306
307
309
310

Tuesday 25

Waxing Crescent 25%

12:54

20:47

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 OK
17 OK
18 Good
19 OK
20 OK
21 OK
22 OK
23 OK
00 OK
01 OK

Sun - Rise: 08:20, Set: 16:37, Transit: 12:29. Moon - Rise: 12:54, Set: 20:47. Civil Dark: 17:16 - 07:41. Nautical Dark: 17:59 - 06:58. Astro Dark: 18:39 - 06:18

Total Clouds (% Sky Obscured)

66
68
64
62
58
66
74
83
83
83
82
73
64
50
30
15
0
0
0
0
0
10
15
10

Low Clouds (% Sky Obscured)

57
61
58
58
56
54
54
47
43
39
37
35
33
31
21
10
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

40
40
40
35
35
45
60
75
76
74
71
66
64
50
30
15
0
0
0
0
0
10
15
10

High Clouds (% Sky Obscured)

0
0
0
0
5
5
5
5
2
2
1
0
0
0
0
0
0
0
0
0
0
0
3
2

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
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

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 (%)

19
11
30
31
16
28
26
9
25
24
5
25
24
3
8
13
6
19
25
31
32
32
27
33

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

3
3
3
2
2
3
3
4
3
3
5
4
4
4
4
3
4
3
1
1
1
1
1
1

Dew Point (°C)

4
4
4
4
4
4
4
4
4
4
4
3
3
3
3
2
2
2
2
2
2
1
1
0

Relative Humidity (%)

93
90
90
91
91
93
93
91
90
84
79
73
74
75
78
79
82
85
85
86
85
83
82
80

Pressure (mb)

999
999
1000
1001
1001
1002
1003
1004
1005
1006
1006
1007
1007
1008
1009
1010
1011
1011
1012
1013
1013
1014
1014
1014

Ozone (du)

311
315
318
320
319
320
322
325
321
314
312
309
309
309
309
310
312
313
315
317
318
317
316
315

Wednesday 26

Waxing Crescent 34%

13:13

22:06

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

Sun - Rise: 08:21, Set: 16:37, Transit: 12:29. Moon - Rise: 13:13, Set: 22:06. Civil Dark: 17:16 - 07:42. Nautical Dark: 17:58 - 07:00. Astro Dark: 18:39 - 06:19

Total Clouds (% Sky Obscured)

5
20
22
19
22
18
15
11
6
4
3
5
6
7
22
36
50
45
45
45
50
51
63
69

Low Clouds (% Sky Obscured)

0
0
3
5
8
10
11
7
5
4
3
3
4
5
20
36
50
45
44
34
39
41
46
44

Medium Clouds (% Sky Obscured)

5
20
22
19
22
18
15
11
6
4
0
0
0
0
0
0
0
1
2
2
12
19
24
32

High Clouds (% Sky Obscured)

1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
5
5
9
10
15

ISS Passover

Visibility (miles)

8
8
8
8
8
7
8
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 (%)

32
38
41
35
35
38
30
23
29
25
7
14
17
4
11
13
4
11
14
13
16
16
14
15

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)

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

Chance of Frost

Temperature (°C)

4
4
4
4
4
4
4
4
4
5
6
6
6
6
6
5
5
5
4
4
4
4
4
4

Feels Like (°C)

1
1
1
0
0
0
0
1
1
1
1
1
7
6
6
5
5
6
3
2
2
3
3
2

Dew Point (°C)

1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2

Relative Humidity (%)

80
82
82
82
80
80
82
83
85
79
74
66
69
70
71
74
75
76
80
83
86
88
86
88

Pressure (mb)

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

Ozone (du)

317
319
320
318
316
313
311
308
305
303
301
299
297
295
293
292
291
290
289
289
289
291
293
296

Thursday 27

Waxing Crescent 44%

13:28

23:25

Sun - Rise: 08:23, Set: 16:36, Transit: 12:29. Moon - Rise: 13:28, Set: 23:25. Civil Dark: 17:15 - 07:44. Nautical Dark: 17:58 - 07:01. Astro Dark: 18:38 - 06:20

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: 21/11/25 02:33:56. Forecast: 21/11/25 to 27/11/25. Timezone: UTC+1.00