Clear Outside v1.0 - International Weather Forecasts For Astronomers

Thursday 30

Waxing Gibbous 99%

20:13

05:34

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

Sun - Rise: 06:10, Set: 21:05, Transit: 13:39. Moon - Rise: 20:13, Set: 05:34. Civil Dark: 21:44 - 05:31. Nautical Dark: 22:35 - 04:40. Astro Dark: 23:39 - 03:35

Total Clouds (% Sky Obscured)

47
36
28
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Low Clouds (% Sky Obscured)

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

Medium Clouds (% Sky Obscured)

0
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)

1
1
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
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)

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

Chance of Frost

Temperature (°C)

13
15
17
18
19
20
20
20
19
18
17
15
14
13
12
11
11
10
10
9
9
10
12
14

Feels Like (°C)

9
10
12
14
14
15
15
16
16
15
14
13
12
11
10
9
9
8
8
7
6
8
9
11

Dew Point (°C)

-2
-2
-1
-0
0
0
2
4
6
7
7
7
7
6
5
4
3
3
3
3
2
3
2
3

Relative Humidity (%)

35
32
30
29
27
27
30
34
41
49
54
58
61
62
60
58
59
61
63
64
64
61
52
47

Pressure (mb)

1028
1028
1028
1027
1027
1026
1026
1025
1025
1025
1026
1026
1026
1027
1027
1027
1026
1026
1026
1026
1026
1026
1026
1026

Ozone (du)

374
374
375
377
377
377
376
375
374
374
374
375
376
376
376
376
377
376
376
376
377
378
378
378

Friday 1

Full Moon 100%

21:28

05:51

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

Sun - Rise: 06:08, Set: 21:07, Transit: 13:39. Moon - Rise: 21:28, Set: 05:51. Civil Dark: 21:46 - 05:29. Nautical Dark: 22:37 - 04:37. Astro Dark: 23:42 - 03:31

Total Clouds (% Sky Obscured)

0
0
0
0
1
2
1
0
0
0
0
0
0
3
35
75
100
100
100
82
58
81
92
92

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
23
0
43
44
42
65

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
2
25
10
2
28
83
82
58
41
78
33

High Clouds (% Sky Obscured)

0
0
0
0
1
1
1
0
0
0
0
0
0
0
1
57
100
100
100
10
11
52
45
58

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
1
3

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
4
34
12
16
8
3
14

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)

14
14
14
13
13
12
11
10
8
6
5
5
6
6
6
5
5
5
5
5
5
5
6
7

Chance of Frost

Temperature (°C)

16
18
20
21
22
23
23
23
23
22
19
17
16
15
15
14
13
13
13
13
13
15
16
18

Feels Like (°C)

13
15
17
18
19
21
21
22
22
22
20
18
16
16
14
13
12
11
11
11
12
13
14
16

Dew Point (°C)

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

Relative Humidity (%)

41
38
36
35
34
34
33
38
43
52
56
60
63
65
67
71
71
72
75
74
71
71
67
64

Pressure (mb)

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

Ozone (du)

377
377
379
381
382
382
381
381
382
384
386
386
385
386
385
387
387
379
376
375
374
373
372
370

Saturday 2

Waning Gibbous 98%

22:43

06:12

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
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad

Sun - Rise: 06:06, Set: 21:09, Transit: 13:38. Moon - Rise: 22:43, Set: 06:12. Civil Dark: 21:48 - 05:27. Nautical Dark: 22:40 - 04:35. Astro Dark: 23:46 - 03:27

Total Clouds (% Sky Obscured)

100
96
100
100
100
100
100
97
100
100
100
100
100
99
100
100
100
96
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

59
58
54
35
3
0
21
22
25
51
46
55
58
76
74
75
76
53
53
50
68
75
74
71

Medium Clouds (% Sky Obscured)

29
56
41
51
38
18
13
31
90
100
100
100
100
89
81
79
100
91
89
100
94
100
100
100

High Clouds (% Sky Obscured)

100
38
100
100
100
100
100
93
100
100
100
100
100
89
100
100
85
72
100
75
100
100
100
100

ISS Passover

Visibility (miles)

9
9
5
5
2
2
2
2
9
9
9
9
9
9
9
9
8
9
9
5
4
3
9
7

Fog (%)

2
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
Very Light Rain
None
None
Light Rain
None
None
None
None
None
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain

Precipitation Probability (%)

16
12
12
6
5
4
6
6
11
36
68
58
44
68
33
34
31
38
55
82
95
80
76
94

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0.3
0
0
0.5
0
0
0
0
0
0.5
1
0.5
0.4
0.6

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

64
61
60
59
61
64
66
66
67
69
71
72
75
81
83
83
92
95
95
98
98
95
93
87

Pressure (mb)

1018
1018
1018
1017
1017
1017
1016
1016
1015
1015
1014
1014
1014
1013
1013
1012
1011
1011
1010
1010
1009
1009
1009
1009

Ozone (du)

368
367
366
364
363
362
362
362
362
365
366
367
366
366
367
368
369
369
369
368
368
370
371
371

Sunday 3

Waning Gibbous 95%

23:55

06:42

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
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad

Sun - Rise: 06:04, Set: 21:10, Transit: 13:38. Moon - Rise: 23:55, Set: 06:42. Civil Dark: 21:50 - 05:25. Nautical Dark: 22:42 - 04:32. Astro Dark: 23:50 - 03:23

Total Clouds (% Sky Obscured)

99
99
98
99
99
100
79
77
75
71
62
58
53
52
53
76
93
100
99
97
96
92
87
82

Low Clouds (% Sky Obscured)

75
79
82
84
84
68
64
66
71
62
56
44
48
52
53
49
45
38
45
53
60
61
61
62

Medium Clouds (% Sky Obscured)

98
96
95
93
35
31
24
19
19
18
20
20
20
19
15
28
44
55
52
45
38
37
33
25

High Clouds (% Sky Obscured)

95
92
88
92
95
100
41
22
3
2
1
0
0
0
0
33
67
100
72
43
15
10
5
0

ISS Passover

Visibility (miles)

9
4
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
0
0
0
0
0
0
0
0

Precipitation Type

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
None
None
None

Precipitation Probability (%)

95
95
95
95
93
83
70
52
23
21
14
0
1
2
1
5
6
2
4
6
5
11
14
13

Precipitation Amount (mm)

1
2.3
1.3
0.8
0.6
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)

8
9
10
10
11
12
14
14
12
11
10
8
7
8
7
8
7
6
6
6
6
7
6
6

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

92
93
95
93
79
75
76
71
70
72
75
76
77
80
80
83
81
81
84
88
91
88
83
74

Pressure (mb)

1009
1008
1008
1008
1008
1009
1009
1010
1010
1011
1011
1011
1011
1011
1011
1011
1011
1011
1011
1012
1012
1012
1013
1013

Ozone (du)

373
373
374
377
380
385
394
392
389
387
387
387
386
386
386
383
380
379
378
378
379
377
376
376

Monday 4

Waning Gibbous 90%

00:58

07:24

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
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad

Sun - Rise: 06:03, Set: 21:12, Transit: 13:38. Moon - Rise: 00:58, Set: 07:24. Civil Dark: 21:52 - 05:23. Nautical Dark: 22:45 - 04:29. Astro Dark: 23:54 - 03:19

Total Clouds (% Sky Obscured)

81
80
80
79
82
82
77
72
65
64
63
64
72
80
89
91
93
95
93
91
89
83
77
71

Low Clouds (% Sky Obscured)

65
67
69
71
74
76
72
64
58
57
53
54
59
54
49
59
69
79
73
67
61
60
60
59

Medium Clouds (% Sky Obscured)

17
26
1
0
0
1
29
28
35
30
30
30
50
65
82
85
91
95
93
91
89
83
77
71

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
5
5
5
5
5
5
5
0
0
0
0
0
0
3
6
9

ISS Passover

Visibility (miles)

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

Precipitation Probability (%)

24
29
29
22
13
3
4
2
1
4
6
9
26
35
37
49
52
54
52
48
50
55
59
64

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

66
59
56
54
54
54
56
59
63
68
71
73
76
85
91
95
95
96
95
95
95
95
93
93

Pressure (mb)

1013
1013
1013
1013
1013
1013
1013
1013
1013
1013
1013
1013
1013
1013
1013
1013
1013
1012
1012
1012
1012
1012
1012
1012

Ozone (du)

375
374
372
371
371
370
369
368
367
365
363
364
365
367
368
368
369
371
373
373
374
375
376
376

Tuesday 5

Waning Gibbous 83%

01:50

08:19

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
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad

Sun - Rise: 06:01, Set: 21:14, Transit: 13:38. Moon - Rise: 01:50, Set: 08:19. Civil Dark: 21:54 - 05:21. Nautical Dark: 22:47 - 04:27. Astro Dark: 23:58 - 03:14

Total Clouds (% Sky Obscured)

73
78
81
76
69
70
74
77
81
84
88
91
93
95
98
99
99
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

41
22
3
20
36
52
47
41
36
37
39
37
43
48
56
60
63
66
68
70
70
79
86
92

Medium Clouds (% Sky Obscured)

73
78
80
58
35
13
30
48
65
73
81
91
93
95
97
98
99
100
100
100
100
100
100
100

High Clouds (% Sky Obscured)

7
4
2
3
4
14
24
34
35
55
55
55
55
55
45
19
8
1
2
0
4
0
0
5

ISS Passover

Visibility (miles)

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

Very Light Rain
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

Precipitation Probability (%)

56
45
32
24
15
3
6
4
1
4
4
2
18
24
27
39
47
49
60
71
83
78
73
70

Precipitation Amount (mm)

0.2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.3
0.4
0.6
0.5
0.4
0.3

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

93
93
93
93
91
91
90
90
90
90
90
88
88
90
91
91
93
94
94
94
94
95
93
93

Pressure (mb)

1012
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012

Ozone (du)

377
376
375
374
374
374
374
376
379
381
383
385
388
388
388
388
387
386
385
384
383
381
384
387

Wednesday 6

Waning Gibbous 75%

02:28

09:25

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
03 Bad
04 Bad
05 Bad
06 Bad
07 OK

Sun - Rise: 05:59, Set: 21:15, Transit: 13:38. Moon - Rise: 02:28, Set: 09:25. Civil Dark: 21:56 - 05:18. Nautical Dark: 22:49 - 04:24. Astro Dark: 00:02 - 03:10

Total Clouds (% Sky Obscured)

96
93
89
72
56
40
38
34
30
46
59
69
75
83
92
83
73
62
55
47
41

Low Clouds (% Sky Obscured)

85
78
71
57
42
27
26
24
22
26
28
31
37
47
59
56
56
54
49
42
36

Medium Clouds (% Sky Obscured)

83
67
51
34
17
0
0
1
1
1
0
0
0
0
0
0
0
0
1
1
2

High Clouds (% Sky Obscured)

4
8
7
7
8
4
3
2
1
5
9
9
9
8
7
19
32
45
40
37
20

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

Fog (%)

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

Precipitation Probability (%)

65
58
50
43
34
26
24
20
9
16
22
26
43
52
58
49
37
18
18
14
2

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

6
6
6
6
6
7
9
8
8
7
6
4
3
3
5
7
6
5
4
4
3

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

5
5
5
5
8
9
9
9
9
10
8
8
8
8
8
7
4
3
2
2
1

Dew Point (°C)

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

Relative Humidity (%)

93
87
80
74
70
66
61
64
66
69
72
74
77
81
87
90
90
88
86
82
78

Pressure (mb)

1012
1013
1013
1013
1013
1014
1014
1014
1014
1015
1015
1016
1016
1016
1017
1017
1018
1018
1018
1019
1019

Ozone (du)

389
387
385
383
384
385
386
386
386
386
389
393
396
396
396
396
393
390
387
387
386

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

Generated: 30/04/26 11:39:51. Forecast: 30/04/26 to 06/05/26. Timezone: UTC+2.00