Clear Outside v1.0 - International Weather Forecasts For Astronomers

Monday 26

First Quarter 56%

10:57

03:21

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 OK
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad

Sun - Rise: 08:30, Set: 17:18, Transit: 12:54. Moon - Rise: 10:57, Set: 03:21. Civil Dark: 17:56 - 07:52. Nautical Dark: 18:37 - 07:11. Astro Dark: 19:17 - 06:31

Total Clouds (% Sky Obscured)

94
92
94
86
82
91
93
63
77
89
81
92
99
100
100
98
83
52
46
67
68
100
100
100

Low Clouds (% Sky Obscured)

81
92
68
68
82
88
93
59
77
89
81
92
99
100
79
96
83
50
46
67
66
67
53
59

Medium Clouds (% Sky Obscured)

22
20
12
1
0
2
0
2
0
0
0
0
0
6
0
2
0
0
0
0
0
2
96
100

High Clouds (% Sky Obscured)

1
0
0
0
0
0
0
0
0
0
0
1
75
42
88
20
20
26
27
23
33
100
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 (%)

0
0
0
0
0
0
1
0
0
0
0
1
2
11
0
0
2
0
0
1
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
6
5
4
3
3
4
5
4
4
4
4
3
2
2
5
3
5
5
6
6
9
10
10

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

86
86
86
86
86
81
77
73
72
72
74
77
85
83
81
80
80
80
84
88
89
89
87
89

Pressure (mb)

1000
1000
1001
1001
1002
1003
1003
1003
1003
1003
1003
1003
1003
1004
1004
1003
1004
1004
1003
1003
1002
1001
1001
1000

Ozone (du)

434
436
443
443
440
442
446
452
457
448
439
432
430
431
433
439
448
436
427
420
407
397
384
379

Tuesday 27

Waxing Gibbous 68%

11:19

04:51

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
03 Bad
04 Bad

Sun - Rise: 08:28, Set: 17:20, Transit: 12:54. Moon - Rise: 11:19, Set: 04:51. Civil Dark: 17:58 - 07:51. Nautical Dark: 18:39 - 07:10. Astro Dark: 19:19 - 06:30

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
84
100
100
100

Low Clouds (% Sky Obscured)

69
71
73
82
80
65
64
57
40
98
100
100
80
60
64
81
76
75
71
85
77
68
69
69

Medium Clouds (% Sky Obscured)

100
78
88
68
100
100
96
100
100
100
100
100
100
99
100
95
100
99
50
53
38
71
100
66

High Clouds (% Sky Obscured)

100
100
100
100
100
100
93
100
100
100
100
100
100
88
100
100
93
100
100
100
27
100
100
100

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
4
3
3
5
5
8
9
3
6
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
34
83
98
100

Precipitation Type

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

Precipitation Probability (%)

0
0
0
0
0
3
8
30
83
95
95
95
95
65
53
27
25
3
0
0
0
0
0
0

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0.4
1
1.8
1.4
1
0.2
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

89
91
89
89
87
84
80
76
77
85
93
93
93
96
96
98
98
96
94
91
89
91
89
89

Pressure (mb)

999
998
997
997
996
995
994
993
991
991
990
990
990
990
991
991
992
992
993
993
994
994
995
995

Ozone (du)

379
375
374
373
373
371
367
366
363
363
364
363
361
362
363
363
364
363
364
366
368
371
373
373

Wednesday 28

Waxing Gibbous 79%

11:52

No Set

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
03 Bad
04 Bad

Sun - Rise: 08:27, Set: 17:22, Transit: 12:55. Moon - Rise: 11:52, Set: No Set. Civil Dark: 17:59 - 07:50. Nautical Dark: 18:40 - 07:09. Astro Dark: 19:20 - 06:29

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
92
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

71
74
86
91
89
97
80
85
89
92
95
89
90
81
72
67
67
65
63
74
72
72
77
85

Medium Clouds (% Sky Obscured)

78
97
100
100
100
81
77
87
71
76
64
70
87
100
100
100
100
100
95
87
91
96
100
84

High Clouds (% Sky Obscured)

100
100
100
100
99
100
92
18
100
100
100
100
100
100
100
100
100
66
90
100
100
100
100
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 (%)

100
100
99
98
100
98
89
56
34
16
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
1
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)

7
6
6
6
5
5
5
4
3
1
1
2
4
4
4
4
5
5
5
5
5
5
5
5

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

89
93
93
93
93
91
85
80
79
77
78
82
86
91
93
94
94
96
96
96
93
93
92
91

Pressure (mb)

995
996
996
996
996
997
997
997
997
997
997
997
998
998
998
998
999
999
999
999
999
999
999
1000

Ozone (du)

375
378
383
393
407
412
421
437
443
449
455
461
463
465
464
462
464
461
455
453
448
451
454
460

Thursday 29

Waxing Gibbous 88%

12:43

06:12

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
03 Bad
04 Bad

Sun - Rise: 08:25, Set: 17:24, Transit: 12:55. Moon - Rise: 12:43, Set: 06:12. Civil Dark: 18:01 - 07:48. Nautical Dark: 18:42 - 07:07. Astro Dark: 19:22 - 06:28

Total Clouds (% Sky Obscured)

100
100
100
99
99
93
87
81
71
64
55
70
82
93
93
92
92
85
68
70
79
78
95
98

Low Clouds (% Sky Obscured)

93
100
100
99
99
93
87
81
71
59
52
56
61
69
62
54
49
32
16
0
11
23
34
52

Medium Clouds (% Sky Obscured)

68
62
61
61
60
65
1
0
0
0
0
10
24
29
34
39
41
39
34
38
48
43
68
94

High Clouds (% Sky Obscured)

95
92
85
9
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
23
46
69
79

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
1
1
1
1
1
2
1
1
13
1
2
1
5
2
1
1
2
4
1
3
6
2
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

91
87
84
83
83
80
81
79
77
77
76
76
76
76
77
79
80
83
86
88
88
89
89
89

Pressure (mb)

1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
999
999
999
999
999
999
999
999
999
998
998
998
998
997

Ozone (du)

470
471
472
471
473
474
477
479
479
474
474
468
453
427
393
376
367
365
365
368
373
376
377
375

Friday 30

Waxing Gibbous 95%

13:53

07:16

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
03 Bad
04 Bad

Sun - Rise: 08:24, Set: 17:26, Transit: 12:55. Moon - Rise: 13:53, Set: 07:16. Civil Dark: 18:03 - 07:47. Nautical Dark: 18:44 - 07:06. Astro Dark: 19:23 - 06:26

Total Clouds (% Sky Obscured)

97
100
80
90
80
81
85
86
86
87
88
83
77
74
100
100
100
99
99
98
97
96
95
97

Low Clouds (% Sky Obscured)

68
87
80
80
75
77
72
71
70
73
72
69
64
58
83
79
76
82
89
96
93
91
89
83

Medium Clouds (% Sky Obscured)

90
94
48
58
29
17
48
21
51
64
72
45
21
10
21
16
21
33
45
52
61
70
79
80

High Clouds (% Sky Obscured)

89
98
75
51
27
25
24
26
19
11
4
5
4
5
49
63
72
54
39
26
34
42
65
67

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
8
8
8
9
9
7
6
4

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

Precipitation Probability (%)

22
27
27
24
3
2
3
1
13
21
25
30
25
23
45
45
46
39
31
29
38
52
72
71

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

88
89
89
91
91
89
85
80
76
75
83
86
88
91
93
91
93
93
91
93
93
93
94
94

Pressure (mb)

997
997
996
996
997
997
997
996
996
996
996
995
996
996
996
993
994
994
994
994
994
994
994
994

Ozone (du)

372
373
374
376
379
379
379
381
382
386
392
396
401
406
410
409
408
407
406
406
405
407
409
411

Saturday 31

Waxing Gibbous 99%

15:19

08:01

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
03 Bad
04 Bad

Sun - Rise: 08:22, Set: 17:28, Transit: 12:55. Moon - Rise: 15:19, Set: 08:01. Civil Dark: 18:04 - 07:46. Nautical Dark: 18:45 - 07:05. Astro Dark: 19:25 - 06:25

Total Clouds (% Sky Obscured)

98
100
97
95
92
94
97
100
100
100
100
100
99
98
96
94
92
84
72
62
64
61
48
62

Low Clouds (% Sky Obscured)

78
71
70
68
70
67
60
53
55
54
55
61
67
74
74
75
79
63
53
42
40
37
33
52

Medium Clouds (% Sky Obscured)

74
65
76
83
90
80
73
69
68
66
75
73
66
55
50
44
39
36
30
18
19
23
31
37

High Clouds (% Sky Obscured)

68
70
62
55
44
60
78
99
99
100
100
93
85
77
70
66
60
42
23
10
15
10
10
0

ISS Passover

Visibility (miles)

5
7
8
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

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

Precipitation Probability (%)

61
54
48
43
42
36
28
16
13
17
17
13
14
20
20
16
19
18
10
0
1
3
1
3

Precipitation Amount (mm)

0.3
0.2
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
9
9
9
9
9
10
10
8
8
7
6
6
6
6
6
6
7
7
7
7
7
7

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

93
91
91
90
86
84
82
78
75
75
74
75
77
81
85
83
83
85
85
85
86
85
83
82

Pressure (mb)

994
995
995
996
996
997
998
998
999
999
1000
1000
1001
1002
1002
1003
1003
1004
1004
1004
1004
1004
1005
1005

Ozone (du)

414
418
421
422
422
423
424
426
428
428
428
428
428
429
429
430
430
431
429
428
426
425
424
423

Sunday 1

Full Moon 100%

16:51

08:30

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

Sun - Rise: 08:21, Set: 17:29, Transit: 12:55. Moon - Rise: 16:51, Set: 08:30. Civil Dark: 18:06 - 07:44. Nautical Dark: 18:47 - 07:03. Astro Dark: 19:26 - 06:24

Total Clouds (% Sky Obscured)

81
97
96
95
95
96
97
99
99
99
99
99
98
98
83
69
57
68
79
90

Low Clouds (% Sky Obscured)

71
90
88
85
83
84
85
87
88
89
90
87
83
78
67
57
46
56
65
75

Medium Clouds (% Sky Obscured)

39
49
50
48
54
62
69
77
71
64
61
61
61
60
37
17
0
5
9
11

High Clouds (% Sky Obscured)

0
0
5
5
9
9
18
27
29
23
20
14
8
1
1
0
0
0
0
0

ISS Passover

Visibility (miles)

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

Precipitation Type

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

Precipitation Probability (%)

8
1
5
9
1
3
6
3
11
14
15
24
30
34
35
31
23
21
20
19

Precipitation Amount (mm)

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

Chance of Frost

Temperature (°C)

3
2
2
2
2
2
2
2
2
2
2
3
3
3
3
3
3
3
3
3

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

83
83
82
82
81
83
81
80
82
85
89
93
94
93
94
93
93
91
89
89

Pressure (mb)

1005
1005
1005
1005
1005
1006
1006
1006
1006
1006
1005
1005
1005
1005
1006
1006
1006
1006
1006
1005

Ozone (du)

426
429
432
431
431
431
443
456
468
460
452
444
435
426
417
412
407
402
399
397

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

Generated: 26/01/26 05:50:58. Forecast: 26/01/26 to 01/02/26. Timezone: UTC+1.00