Clear Outside v1.0 - International Weather Forecasts For Astronomers

Saturday 31

Waxing Gibbous 99%

16:17

07:39

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
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad

Sun - Rise: 07:34, Set: 16:56, Transit: 12:15. Moon - Rise: 16:17, Set: 07:39. Civil Dark: 17:30 - 07:00. Nautical Dark: 18:09 - 06:21. Astro Dark: 18:47 - 05:43

Total Clouds (% Sky Obscured)

99
100
100
99
99
99
99
99
99
100
100
100
100
100
98
95
97
97
95
94
93
97
98
99

Low Clouds (% Sky Obscured)

95
86
85
83
83
80
83
84
86
85
83
89
92
96
90
82
79
78
82
80
86
86
90
93

Medium Clouds (% Sky Obscured)

80
86
87
91
85
87
92
96
90
96
98
96
54
47
39
37
36
37
38
40
40
21
12
5

High Clouds (% Sky Obscured)

59
77
69
51
44
59
52
47
49
63
93
88
83
60
36
46
57
52
27
30
18
34
34
26

ISS Passover

Visibility (miles)

7
9
9
9
9
9
9
9
7
6
5
6
9
8
7
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
11
11
8
9
12
15
22
20
13
11
12
7
8
12
1
1
2
2
1
2
1
2

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-4
-4
-5
-5
-5
-5
-5
-6
-6
-6
-6
-6
-6
-6
-6
-5
-5
-4
-4
-4
-4
-4
-4
-4

Relative Humidity (%)

86
86
86
86
86
86
86
84
84
84
85
85
84
82
81
82
81
81
81
83
84
87
89
89

Pressure (mb)

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

Ozone (du)

410
409
408
410
413
413
413
414
416
419
419
417
417
417
417
418
419
420
420
420
421
417
418
439

Sunday 1

Full Moon 100%

17:44

08:02

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
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad

Sun - Rise: 07:33, Set: 16:57, Transit: 12:15. Moon - Rise: 17:44, Set: 08:02. Civil Dark: 17:32 - 06:58. Nautical Dark: 18:11 - 06:19. Astro Dark: 18:49 - 05:42

Total Clouds (% Sky Obscured)

98
98
98
99
98
96
93
97
99
100
100
99
95
77
53
60
66
53
79
84
88
88
93
97

Low Clouds (% Sky Obscured)

96
93
88
88
88
86
87
91
97
98
99
96
93
77
53
60
66
53
52
60
68
82
93
97

Medium Clouds (% Sky Obscured)

6
10
14
15
9
5
2
4
35
39
51
51
28
22
18
2
0
2
4
27
40
19
0
0

High Clouds (% Sky Obscured)

9
9
32
72
71
72
36
53
26
3
20
18
15
7
4
7
4
4
53
34
22
0
0
1

ISS Passover

Visibility (miles)

9
9
9
9
9
7
6
6
7
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 (%)

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

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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-4
-5
-5
-5
-6
-6
-6
-6
-6
-6
-6
-6
-6
-6
-6
-5
-5
-4
-4
-4
-4
-3
-4
-4

Relative Humidity (%)

87
86
87
86
84
85
85
85
87
84
84
84
82
81
79
78
78
78
77
80
86
89
87
83

Pressure (mb)

1014
1014
1014
1014
1014
1014
1013
1013
1013
1012
1012
1012
1012
1012
1012
1012
1011
1011
1011
1011
1010
1011
1011
1010

Ozone (du)

455
455
455
436
425
419
410
406
411
408
398
389
382
379
380
378
372
366
362
361
361
362
365
367

Monday 2

Waning Gibbous 99%

19:05

08:20

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
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad

Sun - Rise: 07:31, Set: 16:59, Transit: 12:15. Moon - Rise: 19:05, Set: 08:20. Civil Dark: 17:34 - 06:57. Nautical Dark: 18:12 - 06:18. Astro Dark: 18:50 - 05:40

Total Clouds (% Sky Obscured)

78
63
98
100
100
100
100
100
100
100
100
100
100
100
100
100
100
99
99
100
100
100
100
100

Low Clouds (% Sky Obscured)

68
63
96
100
100
100
100
100
100
100
100
100
99
96
92
97
99
96
98
99
99
100
97
95

Medium Clouds (% Sky Obscured)

0
0
0
40
40
45
50
60
65
65
51
65
94
100
94
90
85
83
62
42
79
55
95
67

High Clouds (% Sky Obscured)

51
3
37
1
1
0
3
3
10
11
70
42
100
99
90
86
75
65
57
60
68
91
70
44

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 (%)

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

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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-6
-7
-6
-6
-7
-7
-7
-6
-6
-6
-7
-7
-7
-7
-6
-6
-5
-5
-4
-5
-4
-4
-4
-4

Dew Point (°C)

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

Relative Humidity (%)

84
89
89
87
86
84
84
80
81
80
81
80
78
77
75
74
74
76
76
78
80
86
86
87

Pressure (mb)

1010
1010
1010
1010
1010
1010
1010
1009
1009
1009
1009
1009
1009
1009
1009
1008
1008
1007
1007
1007
1008
1009
1009
1009

Ozone (du)

367
362
358
356
354
354
351
349
348
344
344
344
344
341
339
342
344
345
347
348
348
349
350
351

Tuesday 3

Waning Gibbous 95%

20:23

08:34

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
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad

Sun - Rise: 07:30, Set: 17:01, Transit: 12:15. Moon - Rise: 20:23, Set: 08:34. Civil Dark: 17:35 - 06:55. Nautical Dark: 18:14 - 06:17. Astro Dark: 18:52 - 05:39

Total Clouds (% Sky Obscured)

100
100
100
100
99
98
97
96
96
96
95
95
95
95
95
95
97
98
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

92
94
85
82
73
66
67
85
88
89
89
91
91
92
94
80
96
98
100
100
100
100
100
100

Medium Clouds (% Sky Obscured)

62
68
100
94
94
89
81
73
45
53
54
63
66
52
32
5
30
62
98
100
100
100
100
95

High Clouds (% Sky Obscured)

28
52
80
100
82
63
45
34
40
40
37
34
35
32
34
26
51
71
100
100
100
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
Snow
Snow
Snow
Snow
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

8
21
31
42
43
39
34
26
17
1
0
0
0
0
0
0
0
0
0
0
0
0
0
1

Precipitation Amount (mm)

0
0
0
0.2
0.2
0.1
0.1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

87
91
91
92
94
94
94
94
94
94
91
91
91
89
88
88
86
88
91
93
93
93
94
94

Pressure (mb)

1009
1010
1009
1010
1010
1010
1010
1010
1009
1009
1010
1009
1009
1009
1009
1008
1008
1007
1007
1007
1006
1006
1005
1004

Ozone (du)

351
353
355
356
357
359
360
363
365
364
364
363
364
365
367
370
372
373
371
371
370
372
374
375

Wednesday 4

Waning Gibbous 89%

No Rise

08:46

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
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad

Sun - Rise: 07:28, Set: 17:03, Transit: 12:15. Moon - Rise: No Rise, Set: 08:46. Civil Dark: 17:37 - 06:54. Nautical Dark: 18:15 - 06:15. Astro Dark: 18:53 - 05:38

Total Clouds (% Sky Obscured)

100
99
98
96
98
99
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

100
97
94
88
83
77
57
50
50
50
31
33
39
44
49
54
52
49
47
52
61
70
74
77

Medium Clouds (% Sky Obscured)

79
80
87
84
81
51
83
80
78
75
90
80
67
57
62
51
59
66
59
60
67
76
74
63

High Clouds (% Sky Obscured)

100
73
46
19
46
73
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
73
42

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
Very Light Rain
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow

Precipitation Probability (%)

1
6
7
6
12
13
9
15
17
17
57
61
62
65
68
69
70
67
66
65
63
61
60
57

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

0
0
0
1
0
-0
-0
-0
0
0
-0
0
0
0
0
1
1
0
-0
-1
-1
-1
-1
-1

Relative Humidity (%)

93
91
91
91
89
88
88
86
85
83
82
83
83
82
80
80
79
80
82
83
84
88
89
89

Pressure (mb)

1003
1003
1002
1001
1001
1000
999
998
998
997
997
997
997
997
997
997
997
997
997
997
997
997
997
997

Ozone (du)

377
376
376
377
376
377
379
378
378
380
381
386
392
398
399
400
401
403
405
407
412
416
421
425

Thursday 5

Waning Gibbous 81%

21:38

08:59

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
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad

Sun - Rise: 07:27, Set: 17:04, Transit: 12:15. Moon - Rise: 21:38, Set: 08:59. Civil Dark: 17:39 - 06:52. Nautical Dark: 18:17 - 06:14. Astro Dark: 18:55 - 05:36

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
99
99
98
98
98
97
97
96
96
97
98
98
98
99
99
100
100

Low Clouds (% Sky Obscured)

79
84
89
94
93
93
93
92
92
92
90
86
85
86
86
88
91
95
97
97
98
99
100
100

Medium Clouds (% Sky Obscured)

57
50
36
28
24
16
12
21
32
47
49
59
64
68
64
61
62
63
65
60
59
49
35
29

High Clouds (% Sky Obscured)

18
45
72
99
98
98
99
67
34
0
0
0
0
0
0
0
0
0
0
2
5
6
6
6

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

Snow
Snow
Snow
Snow
Snow
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

58
52
47
43
39
35
31
28
24
19
15
11
8
5
3
0
1
1
0
1
2
1
2
2

Precipitation Amount (mm)

0.3
0.2
0.2
0.2
0.1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

3
3
3
3
4
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

91
91
91
93
93
94
94
93
94
94
94
94
93
93
88
85
80
80
80
80
85
88
93
93

Pressure (mb)

997
997
997
997
997
997
997
997
998
998
998
998
998
999
998
998
998
998
999
999
999
1000
1000
1001

Ozone (du)

429
433
430
427
425
421
417
413
414
414
415
411
408
405
403
402
400
400
400
400
402
404
406
404

Friday 6

Waning Gibbous 72%

22:51

09:12

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: 07:25, Set: 17:06, Transit: 12:16. Moon - Rise: 22:51, Set: 09:12. Civil Dark: 17:40 - 06:51. Nautical Dark: 18:19 - 06:12. Astro Dark: 18:56 - 05:35

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
100
97
93
89

Low Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
100
92
86
80

Medium Clouds (% Sky Obscured)

23
16
9
1
5
6
7
2
1
0
8
22
44
52
56
65

High Clouds (% Sky Obscured)

8
10
8
9
12
10
3
3
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

Fog (%)

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

Precipitation Probability (%)

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

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

3
3
2
2
2
2
2
1
1
1
1
1
2
2
2
2

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-1
-0
-0
1
0
-1
-1
-1
-1
-1
0
0
0
0
0
-0

Dew Point (°C)

1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0

Relative Humidity (%)

93
93
93
94
94
94
94
94
93
93
93
89
88
86
80
76

Pressure (mb)

1001
1002
1002
1002
1003
1003
1004
1004
1004
1005
1005
1006
1007
1007
1007
1008

Ozone (du)

402
401
399
397
395
394
394
393
395
398
400
399
398
397
395
394

Forecast for Letňany, Praha 18, Czech Republic (50.14,14.52)

Generated: 31/01/26 20:59:08. Forecast: 31/01/26 to 06/02/26. Timezone: UTC+1.00