Clear Outside v1.0 - International Weather Forecasts For Astronomers

Sunday 31

Full Moon 100%

22:50

05:22

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 OK
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad

Sun - Rise: 05:26, Set: 21:52, Transit: 13:39. Moon - Rise: 22:50, Set: 05:22. Civil Dark: 22:38 - 04:39. Nautical Dark: 23:49 - 03:28. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

90
91
93
100
100
95
94
100
100
56
79
61
76
65
84
83
75
87
41
53
59
100
85
100

Low Clouds (% Sky Obscured)

32
28
36
33
31
4
34
0
0
0
0
0
0
0
16
34
44
26
15
4
0
51
29
17

Medium Clouds (% Sky Obscured)

20
0
45
55
39
33
34
40
9
41
64
31
36
26
26
26
20
28
16
23
26
21
40
32

High Clouds (% Sky Obscured)

90
91
93
100
99
81
69
89
94
27
39
1
0
1
0
0
21
33
1
1
6
100
19
100

ISS Passover

Visibility (miles)

2
2
5
5
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
10
30
9
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
0
2
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
5
13
1

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
13
14
14
13
12
10
8
7
5
3
3
3
2
2
3
3
4
4
6
8
10
11

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

60
60
59
59
58
59
64
66
66
73
77
79
71
73
74
74
75
79
76
69
62
60
57
53

Pressure (mb)

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

Ozone (du)

352
352
354
356
357
357
359
361
361
362
364
368
372
368
364
359
356
353
351
350
347
346
347
348

Monday 1

Waning Gibbous 97%

23:45

06:13

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
10 Bad
11 Bad
12 Bad

Sun - Rise: 05:25, Set: 21:53, Transit: 13:39. Moon - Rise: 23:45, Set: 06:13. Civil Dark: 22:40 - 04:38. Nautical Dark: 23:51 - 03:26. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

99
100
100
100
100
100
100
100
100
100
100
100
100
99
98
100
100
100
100
90
100
95
99
100

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
37
26
7
32
38
37
22
22
30
60
58
53
34
39
62
78
56
70

Medium Clouds (% Sky Obscured)

13
4
53
27
46
90
100
100
100
97
93
97
91
97
93
100
100
94
89
86
95
79
81
57

High Clouds (% Sky Obscured)

98
100
100
100
100
100
100
100
100
100
100
100
100
83
72
100
100
100
100
5
100
5
91
100

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
8
9
9
9
9
9
5
3
5
5
6
4
7
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
Very Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Very Light Rain
Light Rain
Light Rain
Light Rain
Very Light Rain
Light Rain

Precipitation Probability (%)

0
0
0
0
0
0
1
21
19
2
1
3
24
57
86
93
95
83
86
95
95
95
61
93

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0.3
0.7
0.7
0.8
0.6
0.3
1.3
0.7
1
0.3
0.7

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

52
51
51
51
51
48
48
54
61
60
62
62
63
69
89
93
96
96
96
92
95
96
95
84

Pressure (mb)

1016
1016
1016
1015
1015
1015
1014
1014
1013
1013
1012
1012
1011
1010
1010
1009
1008
1008
1007
1007
1006
1006
1005
1005

Ozone (du)

347
347
346
346
345
343
342
342
342
344
344
343
345
346
346
348
351
355
357
356
361
363
365
371

Tuesday 2

Waning Gibbous 93%

00:28

07:16

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
10 Bad
11 Bad
12 Bad

Sun - Rise: 05:24, Set: 21:54, Transit: 13:40. Moon - Rise: 00:28, Set: 07:16. Civil Dark: 22:41 - 04:37. Nautical Dark: 23:53 - 03:25. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
92
100
100
100
100
100
100
83
66
59
54
53
47

Low Clouds (% Sky Obscured)

83
62
46
23
32
58
47
60
45
58
46
53
68
69
72
76
83
75
56
53
59
54
53
47

Medium Clouds (% Sky Obscured)

68
54
74
86
100
100
93
99
76
92
100
68
55
50
40
100
73
54
37
27
17
7
5
2

High Clouds (% Sky Obscured)

100
96
100
100
100
100
100
6
5
22
100
81
87
48
49
57
56
55
50
34
14
1
4
1

ISS Passover

Visibility (miles)

5
5
4
3
9
9
9
9
9
9
9
9
9
9
8
6
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

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

Precipitation Probability (%)

95
95
85
46
24
12
7
1
2
5
22
26
37
54
60
64
81
85
68
28
18
6
6
4

Precipitation Amount (mm)

1.8
0.6
0.7
0
0
0
0
0
0
0
0
0
0
0
0.3
0.2
0.6
0.6
0.5
0
0
0
0
0

Wind Speed/Direction (mph)

13
11
16
10
11
8
11
10
10
8
8
7
7
7
8
10
10
10
10
11
12
13
14
15

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

75
69
72
90
76
79
76
82
83
89
92
93
93
96
92
90
93
92
89
78
68
66
66
61

Pressure (mb)

1005
1004
1004
1004
1004
1004
1004
1004
1004
1005
1005
1005
1005
1005
1005
1005
1005
1006
1006
1007
1008
1008
1008
1009

Ozone (du)

372
380
380
380
384
385
381
385
390
395
395
397
393
395
396
394
393
395
389
387
387
383
378
373

Wednesday 3

Waning Gibbous 88%

00:58

08:27

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
10 Bad
11 Bad
12 Bad

Sun - Rise: 05:24, Set: 21:55, Transit: 13:40. Moon - Rise: 00:58, Set: 08:27. Civil Dark: 22:42 - 04:36. Nautical Dark: 23:55 - 03:23. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

44
75
88
100
100
100
100
93
88
82
88
93
96
99
83
75
73
83
79
75
71
69
79
90

Low Clouds (% Sky Obscured)

44
42
35
21
14
15
20
37
52
72
64
56
49
54
59
66
69
72
75
71
66
62
53
43

Medium Clouds (% Sky Obscured)

0
13
29
66
54
98
77
51
39
39
73
90
42
48
54
55
37
17
0
0
0
3
69
82

High Clouds (% Sky Obscured)

5
75
81
82
87
93
100
79
53
26
16
14
12
41
71
75
67
33
0
3
6
8
39
69

ISS Passover

Visibility (miles)

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

Precipitation Probability (%)

4
3
7
2
2
5
5
30
7
9
95
95
65
83
95
95
95
91
63
54
54
43
41
30

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
1.9
1.7
0.2
0.4
0.7
0.8
0.8
0.6
0.2
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

59
59
59
58
57
61
64
67
77
71
68
93
89
90
93
90
89
89
87
83
79
78
73
74

Pressure (mb)

1009
1009
1009
1009
1009
1008
1008
1007
1007
1006
1005
1004
1004
1003
1003
1002
1002
1002
1002
1002
1002
1002
1003
1003

Ozone (du)

367
363
358
354
352
352
352
351
350
356
363
364
385
388
388
392
392
390
385
382
375
371
369
370

Thursday 4

Waning Gibbous 81%

01:21

09:42

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
10 Bad
11 Bad
12 Bad

Sun - Rise: 05:23, Set: 21:56, Transit: 13:40. Moon - Rise: 01:21, Set: 09:42. Civil Dark: 22:43 - 04:36. Nautical Dark: 23:57 - 03:22. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

100
88
75
61
72
86
100
100
100
100
100
100
100
100
100
100
100
100
100
93
86
79
63
52

Low Clouds (% Sky Obscured)

35
34
19
4
4
5
5
12
21
25
27
26
25
29
32
36
38
39
41
44
48
51
44
38

Medium Clouds (% Sky Obscured)

97
88
75
54
72
86
100
100
100
100
84
82
72
81
92
99
99
100
100
93
86
79
63
52

High Clouds (% Sky Obscured)

100
67
33
0
0
0
5
37
68
100
100
100
100
100
100
100
100
100
100
67
33
0
0
0

ISS Passover

Visibility (miles)

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

Precipitation Probability (%)

23
13
15
24
33
29
16
23
31
24
29
30
27
55
47
34
57
68
74
90
89
79
69
53

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0.3
0
0
0.2
0.4
0.4
0.7
0.7
0.5
0.4
0

Wind Speed/Direction (mph)

16
17
17
16
16
15
15
14
13
11
10
10
9
8
8
8
7
7
7
7
7
8
8
10

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

73
66
65
61
65
76
74
72
70
71
67
70
71
76
79
80
81
86
90
96
95
95
92
79

Pressure (mb)

1004
1004
1004
1004
1005
1005
1005
1005
1005
1005
1006
1006
1006
1006
1006
1006
1006
1006
1006
1007
1007
1008
1009
1009

Ozone (du)

367
366
361
356
355
353
353
358
357
359
360
362
361
363
364
366
367
368
370
371
376
381
386
391

Friday 5

Waning Gibbous 72%

01:37

10:58

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

Sun - Rise: 05:23, Set: 21:57, Transit: 13:40. Moon - Rise: 01:37, Set: 10:58. Civil Dark: 22:45 - 04:35. Nautical Dark: 23:59 - 03:20. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

40
34
32
28
19
10
1
10
19
28
23
16
13
18
19
20
25
25
25
28
33
37
38
40

Low Clouds (% Sky Obscured)

31
31
31
28
19
10
0
0
1
1
1
1
0
0
0
0
0
0
0
5
10
16
12
7

Medium Clouds (% Sky Obscured)

38
27
17
6
4
2
0
6
11
14
11
7
4
3
2
1
1
0
0
0
0
0
11
23

High Clouds (% Sky Obscured)

0
0
0
2
2
2
0
1
2
3
15
16
13
18
13
5
5
0
5
0
0
3
2
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
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 (%)

22
21
15
2
4
4
0
0
0
0
4
8
9
8
7
3
2
2
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)

12
14
14
13
13
12
12
11
9
7
6
6
6
6
5
5
5
5
6
6
6
7
7
8

Chance of Frost

Temperature (°C)

16
17
17
17
17
17
16
16
15
14
13
13
12
12
11
11
10
11
12
13
15
16
18
19

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

66
56
54
50
49
54
60
65
70
75
81
80
77
76
77
81
83
79
75
70
62
57
52
47

Pressure (mb)

1010
1011
1012
1012
1013
1014
1014
1015
1015
1016
1017
1017
1017
1018
1018
1018
1018
1019
1019
1019
1020
1020
1020
1020

Ozone (du)

395
400
399
399
398
391
385
378
374
370
367
364
362
359
359
360
360
359
358
358
358
358
358
358

Saturday 6

Waning Gibbous 63%

01:51

12:15

13 OK
14 OK
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

Sun - Rise: 05:22, Set: 21:58, Transit: 13:40. Moon - Rise: 01:51, Set: 12:15. Civil Dark: 22:46 - 04:34. Nautical Dark: 00:00 - 03:19. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

39
46
52
59
72
86
100
97
94
92
96
98
100
100
100
100
98
95
93

Low Clouds (% Sky Obscured)

3
3
2
2
1
1
0
0
0
0
0
0
3
3
4
3
8
7
9

Medium Clouds (% Sky Obscured)

37
40
39
39
53
61
71
68
68
70
72
73
74
67
59
51
55
65
76

High Clouds (% Sky Obscured)

1
6
13
19
46
73
100
86
71
56
69
84
100
100
100
100
90
81
55

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
8
6
4
6
8
9
9
9

Fog (%)

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

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
7
13
20
25
26
25
19
13
6

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

20
21
22
22
22
21
21
20
19
18
17
17
16
16
15
15
14
14
15

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

44
41
41
41
41
44
49
53
55
59
63
68
72
78
78
78
79
76
75

Pressure (mb)

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

Ozone (du)

358
358
357
355
353
353
353
352
353
354
355
356
357
359
361
363
365
366
367

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

Generated: 31/05/26 12:53:17. Forecast: 31/05/26 to 06/06/26. Timezone: UTC+2.00