Clear Outside v1.0 - International Weather Forecasts For Astronomers

Monday 20

Waxing Crescent 14%

No Rise

01:49

08 OK
09 OK
10 OK
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 OK

Sun - Rise: 06:30, Set: 20:48, Transit: 13:40. Moon - Rise: No Rise, Set: 01:49. Civil Dark: 21:25 - 05:53. Nautical Dark: 22:12 - 05:06. Astro Dark: 23:06 - 04:11

Total Clouds (% Sky Obscured)

19
22
35
80
87
65
47
80
100
72
95
66
90
91
100
100
94
95
83
90
80
54
74
47

Low Clouds (% Sky Obscured)

19
22
35
61
63
34
25
33
46
42
68
51
65
80
84
80
72
57
49
29
34
54
65
40

Medium Clouds (% Sky Obscured)

0
9
21
25
25
23
18
32
45
24
42
17
31
28
35
100
85
72
83
90
57
26
29
16

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
20
12
1
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
Very Light Rain
None
None
None
None
None
None
None
None

Precipitation Probability (%)

2
5
7
9
14
4
2
12
3
14
19
21
16
28
40
42
28
23
9
11
4
3
0
0

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.2
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

5
7
9
10
11
12
12
13
13
13
12
12
11
9
8
7
7
8
8
7
7
6
6
5

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

72
65
57
51
46
45
45
48
50
51
50
59
76
80
84
84
79
77
81
82
75
75
82
80

Pressure (mb)

1023
1023
1023
1023
1023
1023
1023
1022
1022
1021
1022
1022
1022
1023
1023
1023
1023
1024
1024
1024
1024
1024
1025
1025

Ozone (du)

426
427
428
429
429
428
429
428
427
427
428
427
423
420
417
414
410
409
406
405
407
409
412
415

Tuesday 21

Waxing Crescent 23%

08:22

02:53

08 Good
09 Good
10 Good
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 Good
02 Good
03 Good
04 Good
05 Good
06 Good
07 Good

Sun - Rise: 06:28, Set: 20:50, Transit: 13:40. Moon - Rise: 08:22, Set: 02:53. Civil Dark: 21:27 - 05:51. Nautical Dark: 22:14 - 05:03. Astro Dark: 23:09 - 04:08

Total Clouds (% Sky Obscured)

1
2
2
1
0
0
1
1
2
1
1
1
1
1
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)

0
0
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)

9
10
10
11
12
13
13
13
13
14
13
12
10
9
9
10
10
10
9
8
7
7
7
7

Chance of Frost

Temperature (°C)

5
6
8
9
11
12
13
14
15
15
14
14
12
11
9
8
7
7
6
6
5
5
4
4

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

76
69
64
58
52
46
43
40
38
38
40
44
49
53
57
63
69
70
72
74
76
78
80
82

Pressure (mb)

1026
1026
1026
1027
1027
1027
1026
1026
1026
1026
1026
1026
1026
1027
1027
1028
1028
1028
1028
1028
1029
1029
1029
1029

Ozone (du)

420
425
422
420
418
417
417
416
413
410
407
407
407
409
405
399
395
388
386
393
392
393
395
395

Wednesday 22

Waxing Crescent 34%

09:33

03:36

08 Good
09 Good
10 Good
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 Bad
00 Bad
01 Bad
02 Bad
03 Bad
04 OK
05 Bad
06 Bad
07 Bad

Sun - Rise: 06:26, Set: 20:52, Transit: 13:40. Moon - Rise: 09:33, Set: 03:36. Civil Dark: 21:29 - 05:49. Nautical Dark: 22:16 - 05:01. Astro Dark: 23:12 - 04:04

Total Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
49
57
61
53
49
45
52
57
61

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
49
57
61
53
49
45
52
57
61

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)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
4
4

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)

8
10
10
10
10
10
10
11
12
12
12
12
10
9
8
7
7
5
5
5
4
4
4
4

Chance of Frost

Temperature (°C)

5
7
9
11
13
14
15
16
17
17
16
15
14
12
10
8
7
6
5
5
5
5
6
6

Feels Like (°C)

3
4
7
9
11
12
13
14
14
13
13
12
12
10
8
7
5
5
5
5
5
5
6
6

Dew Point (°C)

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

Relative Humidity (%)

76
65
57
50
43
39
35
33
31
32
38
45
51
57
63
69
72
78
80
82
86
88
86
82

Pressure (mb)

1030
1030
1030
1030
1030
1030
1030
1030
1029
1029
1029
1029
1029
1030
1030
1030
1030
1030
1030
1030
1030
1029
1029
1029

Ozone (du)

397
397
393
389
388
387
389
392
394
394
393
393
393
393
395
393
393
389
386
384
383
381
378
376

Thursday 23

Waxing Crescent 46%

10:56

04:05

08 Bad
09 OK
10 OK
11 OK
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

Sun - Rise: 06:24, Set: 20:54, Transit: 13:40. Moon - Rise: 10:56, Set: 04:05. Civil Dark: 21:31 - 05:46. Nautical Dark: 22:19 - 04:58. Astro Dark: 23:15 - 04:01

Total Clouds (% Sky Obscured)

54
44
42
41
49
63
67
72
73
76
73
69
74
82
69
73
77
77
81
82
79
82
83
97

Low Clouds (% Sky Obscured)

54
44
30
37
46
62
67
72
72
76
73
69
74
82
69
73
77
77
81
82
79
82
83
92

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)

5
9
30
3
1
0
7
16
25
24
21
18
12
6
0
8
17
25
39
53
67
78
83
97

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
1
0
0
0
0
0
0
0
0
0
0
0
0
0
1
4

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
8
9
10
11
12
13
14
14
14
13
12
11
9
8
7
7
7
6
6
6
6
5
5

Chance of Frost

Temperature (°C)

7
9
10
12
12
13
13
13
12
12
11
11
10
9
9
8
8
8
7
7
7
7
7
7

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

71
60
52
51
51
55
57
58
61
64
65
67
73
78
84
85
87
85
87
87
88
87
87
87

Pressure (mb)

1029
1029
1029
1029
1029
1029
1029
1028
1028
1027
1027
1027
1027
1027
1027
1026
1026
1026
1025
1025
1025
1024
1024
1024

Ozone (du)

376
376
376
374
371
370
371
372
370
365
361
361
361
362
365
367
367
365
364
365
366
366
368
370

Friday 24

First Quarter 58%

12:24

04:24

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
06 Bad
07 Bad

Sun - Rise: 06:22, Set: 20:55, Transit: 13:40. Moon - Rise: 12:24, Set: 04:24. Civil Dark: 21:33 - 05:44. Nautical Dark: 22:21 - 04:56. Astro Dark: 23:19 - 03:57

Total Clouds (% Sky Obscured)

100
100
100
98
96
94
89
83
79
78
73
63
77
76
76
75
75
74
75
81
74
80
85
87

Low Clouds (% Sky Obscured)

91
88
85
83
82
80
79
79
78
77
73
63
77
76
76
75
75
74
75
72
74
77
76
84

Medium Clouds (% Sky Obscured)

20
40
60
47
37
23
17
8
0
0
0
0
13
5
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

100
100
100
79
58
36
24
12
0
0
0
0
70
61
61
37
19
0
1
2
3
11
18
26

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 (%)

16
6
15
5
1
9
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

79
72
70
68
68
67
68
66
65
64
62
60
64
72
80
88
90
90
91
90
88
88
84
82

Pressure (mb)

1023
1023
1023
1023
1023
1023
1023
1022
1022
1022
1022
1022
1022
1021
1021
1021
1021
1021
1020
1020
1020
1020
1020
1020

Ozone (du)

371
370
369
370
369
368
368
369
370
371
372
375
384
385
386
388
387
387
387
388
389
390
390
390

Saturday 25

Waxing Gibbous 68%

13:49

04:39

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 OK
23 OK
00 Bad
01 Bad
02 OK
03 OK
04 Bad
05 Bad
06 Bad
07 OK

Sun - Rise: 06:20, Set: 20:57, Transit: 13:39. Moon - Rise: 13:49, Set: 04:39. Civil Dark: 21:35 - 05:42. Nautical Dark: 22:23 - 04:53. Astro Dark: 23:22 - 03:53

Total Clouds (% Sky Obscured)

85
79
77
74
72
61
59
65
68
72
76
80
66
52
36
40
50
54
48
47
53
55
50
44

Low Clouds (% Sky Obscured)

79
79
70
60
50
45
51
53
59
66
73
80
63
44
21
28
31
34
39
43
42
39
36
32

Medium Clouds (% Sky Obscured)

1
2
3
2
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
9
18
23

High Clouds (% Sky Obscured)

18
10
2
1
1
0
1
1
1
0
0
0
0
0
0
0
0
0
1
1
1
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 (%)

2
4
5
8
12
15
12
8
4
8
10
12
11
8
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
9
10
12
12
13
14
14
14
15
14
13
13
12
11
10
9
9
9
8
7
6
6
5

Chance of Frost

Temperature (°C)

8
9
11
12
12
12
13
12
12
11
10
9
9
8
8
7
7
7
6
6
6
5
6
6

Feels Like (°C)

6
7
7
7
8
9
9
10
9
9
9
8
9
4
4
4
4
4
4
3
3
3
3
3

Dew Point (°C)

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

Relative Humidity (%)

79
67
57
47
47
47
47
52
56
61
62
64
65
67
68
67
67
67
66
67
70
71
70
70

Pressure (mb)

1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
1021
1021
1022
1022
1023
1023
1023
1024
1024
1024
1024
1025

Ozone (du)

390
391
392
394
393
392
391
387
383
379
380
380
381
380
379
378
378
378
378
378
378
379
377
375

Sunday 26

Waxing Gibbous 78%

15:10

04:50

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 OK
23 Bad
00 Bad
01 Bad

Sun - Rise: 06:18, Set: 20:59, Transit: 13:39. Moon - Rise: 15:10, Set: 04:50. Civil Dark: 21:37 - 05:40. Nautical Dark: 22:26 - 04:50. Astro Dark: 23:25 - 03:50

Total Clouds (% Sky Obscured)

52
62
73
71
69
66
65
65
66
61
59
55
53
50
46
57
68
79

Low Clouds (% Sky Obscured)

43
50
58
66
69
66
65
63
57
51
51
48
51
50
46
57
68
79

Medium Clouds (% Sky Obscured)

29
37
36
31
26
23
17
8
0
6
11
17
10
5
0
0
0
0

High Clouds (% Sky Obscured)

1
1
1
1
2
1
11
22
35
25
14
2
2
1
1
3
6
8

ISS Passover

Visibility (miles)

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

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

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

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

6
8
9
10
11
12
13
13
13
13
13
12
11
10
9
8
7
6

Feels Like (°C)

2
5
5
6
7
7
7
12
12
12
12
12
12
8
7
6
6
6

Dew Point (°C)

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

Relative Humidity (%)

69
63
59
54
50
48
45
47
48
49
49
49
49
51
54
56
58
59

Pressure (mb)

1025
1025
1026
1026
1026
1026
1026
1026
1026
1025
1026
1026
1026
1026
1026
1026
1026
1026

Ozone (du)

373
373
373
373
371
370
368
368
368
368
370
371
372
374
375
377
379
380

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

Generated: 20/04/26 08:13:38. Forecast: 20/04/26 to 26/04/26. Timezone: UTC+2.00