Clear Outside v1.0 - International Weather Forecasts For Astronomers

Saturday 11

Waning Crescent 30%

04:24

13:39

18 OK
19 OK
20 OK
21 OK
22 OK
23 OK
00 OK
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

Sun - Rise: 06:13, Set: 19:49, Transit: 13:02. Moon - Rise: 04:24, Set: 13:39. Civil Dark: 20:23 - 05:39. Nautical Dark: 21:05 - 04:58. Astro Dark: 21:50 - 04:12

Total Clouds (% Sky Obscured)

20
21
28
28
26
28
47
81
96
90
50
84
100
100
95
100
94
98
100
100
100
99
99
100

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
1
1
7
14
19
15
44
55
54
53
58
59

Medium Clouds (% Sky Obscured)

2
2
0
0
9
0
0
1
40
50
49
47
56
65
77
100
92
97
100
100
100
98
96
95

High Clouds (% Sky Obscured)

15
21
18
18
26
24
42
81
91
74
25
52
100
98
72
43
19
78
15
44
59
41
70
72

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
8
6
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
Light Rain
Very Light Rain
Very Light Rain
None
None

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
0
3
9
2
1
3
12
10
24
57
61
56
40
33

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.4
0.3
0.3
0
0

Wind Speed/Direction (mph)

7
7
6
5
6
6
6
5
5
6
5
5
5
5
5
6
4
4
4
2
5
8
6
6

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

9
8
5
5
4
3
2
2
-0
-1
-0
1
-0
0
1
2
4
5
7
8
6
4
4
5

Dew Point (°C)

-1
2
1
-1
-1
-1
-1
-1
-2
-2
-1
-1
-1
-2
-2
-3
-3
-2
-1
0
2
5
6
6

Relative Humidity (%)

44
55
58
58
59
63
68
71
72
73
73
73
74
71
62
54
49
49
48
50
61
85
88
87

Pressure (mb)

1016
1016
1016
1017
1017
1017
1017
1017
1017
1017
1017
1017
1017
1017
1018
1018
1018
1018
1017
1017
1017
1018
1017
1017

Ozone (du)

362
362
362
363
364
364
363
363
362
364
363
360
359
360
363
367
369
371
372
368
363
359
356
350

Sunday 12

Waning Crescent 21%

04:41

14:56

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
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad

Sun - Rise: 06:11, Set: 19:51, Transit: 13:02. Moon - Rise: 04:41, Set: 14:56. Civil Dark: 20:25 - 05:37. Nautical Dark: 21:07 - 04:55. Astro Dark: 21:52 - 04:09

Total Clouds (% Sky Obscured)

100
98
99
99
98
96
99
100
99
100
94
100
100
97
85
100
70
62
60
55
53
54
75
100

Low Clouds (% Sky Obscured)

62
58
56
50
41
43
65
72
77
68
71
69
59
49
36
16
26
20
25
30
30
35
28
35

Medium Clouds (% Sky Obscured)

94
91
95
68
75
62
59
63
66
56
39
55
55
39
31
55
21
25
49
0
0
1
32
62

High Clouds (% Sky Obscured)

45
27
40
75
82
87
83
84
77
94
76
99
99
85
52
95
70
62
60
55
53
54
32
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 (%)

31
31
12
5
3
1
3
1
1
2
4
3
4
4
6
8
3
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)

5
4
2
2
2
3
4
5
7
8
10
10
11
11
12
14
16
17
18
18
16
16
16
16

Chance of Frost

Temperature (°C)

8
8
8
8
8
8
8
8
8
8
8
8
8
8
9
10
12
14
15
16
17
17
17
17

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

87
87
85
85
84
82
82
84
82
79
78
74
74
70
65
61
54
51
49
49
51
53
53
53

Pressure (mb)

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

Ozone (du)

346
345
344
343
343
342
341
340
339
341
341
341
343
344
345
347
347
347
346
347
349
350
352
353

Monday 13

Waning Crescent 13%

04:56

16:15

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
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad

Sun - Rise: 06:09, Set: 19:53, Transit: 13:02. Moon - Rise: 04:56, Set: 16:15. Civil Dark: 20:27 - 05:35. Nautical Dark: 21:08 - 04:53. Astro Dark: 21:55 - 04:06

Total Clouds (% Sky Obscured)

99
93
91
85
98
97
97
100
85
98
83
56
81
100
100
100
100
99
91
94
94
94
95
97

Low Clouds (% Sky Obscured)

20
21
23
26
30
20
2
2
16
24
14
45
45
45
45
45
50
50
50
45
45
45
45
56

Medium Clouds (% Sky Obscured)

92
91
82
70
95
95
95
94
75
59
68
56
81
100
99
100
100
67
85
90
89
86
83
90

High Clouds (% Sky Obscured)

98
88
84
85
94
96
93
100
83
97
83
56
75
99
100
95
94
43
71
74
70
69
78
81

ISS Passover

Visibility (miles)

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

Precipitation Probability (%)

0
0
0
0
0
1
2
1
0
2
3
8
17
33
53
65
59
51
56
47
35
33
35
43

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

15
13
11
10
10
10
9
9
9
9
9
8
7
6
5
4
4
6
6
6
6
7
7
7

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

8
8
7
6
5
5
5
4
4
4
4
4
4
5
6
8
10
11
12
12
12
12
12
12

Relative Humidity (%)

57
58
60
61
60
61
65
67
68
69
72
73
70
74
78
84
90
90
92
92
90
89
87
89

Pressure (mb)

1010
1010
1010
1011
1011
1011
1011
1011
1011
1011
1011
1011
1012
1012
1013
1013
1013
1014
1014
1014
1014
1015
1015
1015

Ozone (du)

355
355
354
354
356
358
358
358
359
360
363
364
367
371
373
372
373
373
373
370
370
370
369
369

Tuesday 14

Waning Crescent 6%

05:10

17:36

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
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad

Sun - Rise: 06:07, Set: 19:54, Transit: 13:01. Moon - Rise: 05:10, Set: 17:36. Civil Dark: 20:28 - 05:33. Nautical Dark: 21:10 - 04:50. Astro Dark: 21:57 - 04:03

Total Clouds (% Sky Obscured)

98
100
100
100
100
100
100
100
100
100
100
100
100
100
100
99
98
98
98
98
94
90
85
65

Low Clouds (% Sky Obscured)

65
77
77
80
82
84
87
90
92
95
97
96
94
93
91
90
90
89
89
90
80
70
57
52

Medium Clouds (% Sky Obscured)

87
100
100
100
100
100
100
100
100
100
93
100
100
100
98
95
93
89
91
92
85
77
69
47

High Clouds (% Sky Obscured)

77
94
100
100
100
100
100
100
100
100
100
100
100
100
78
53
9
2
12
15
15
11
10
5

ISS Passover

Visibility (miles)

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

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
Very Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Very Light Rain
Very Light Rain
Very Light Rain
Very Light Rain
Very Light Rain
Very Light Rain
Very Light Rain
Light Rain
Very Light Rain
Light Rain

Precipitation Probability (%)

55
61
64
78
95
95
93
95
95
95
95
95
95
85
74
67
61
68
69
68
64
68
62
68

Precipitation Amount (mm)

0.2
0.3
0.3
0.4
0.8
0.7
0.5
0.6
1.1
1.2
1.3
1.1
0.8
0.5
0.3
0.3
0.2
0.3
0.3
0.3
0.3
0.4
0.3
0.4

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

90
93
93
93
95
93
95
95
93
95
93
93
91
91
88
84
81
82
84
84
88
90
91
93

Pressure (mb)

1016
1016
1017
1018
1018
1018
1019
1019
1019
1020
1020
1021
1021
1021
1022
1022
1023
1023
1023
1023
1023
1023
1023
1022

Ozone (du)

370
370
370
368
368
370
371
372
371
371
373
375
376
377
378
378
377
377
376
377
377
379
381
385

Wednesday 15

Waning Crescent 2%

05:24

No Set

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
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad

Sun - Rise: 06:05, Set: 19:56, Transit: 13:01. Moon - Rise: 05:24, Set: No Set. Civil Dark: 20:30 - 05:31. Nautical Dark: 21:12 - 04:48. Astro Dark: 21:59 - 04:00

Total Clouds (% Sky Obscured)

46
37
30
32
35
45
58
62
77
88
100
100
100
100
92
89
87
87
88
87
91
96
100
96

Low Clouds (% Sky Obscured)

46
37
30
32
30
35
40
45
50
56
61
67
69
71
91
89
86
84
82
80
80
80
81
81

Medium Clouds (% Sky Obscured)

26
10
20
20
25
31
45
58
74
87
99
99
96
100
69
73
80
81
72
76
64
51
54
69

High Clouds (% Sky Obscured)

10
10
15
15
15
15
13
13
15
15
20
25
30
50
75
75
75
80
88
87
91
96
100
92

ISS Passover

Visibility (miles)

6
8
6
5
5
5
4
3
4
3
4
6
6
5
4
4
4
4
5
7
8
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
Very Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Very Light Rain
Very Light Rain
None
None
None

Precipitation Probability (%)

52
65
79
82
89
95
95
95
95
95
83
83
83
95
91
90
91
82
73
63
53
46
36
36

Precipitation Amount (mm)

0
0.3
0.4
0.5
0.6
0.8
1
0.9
1
0.9
0.6
0.6
0.4
0.9
0.7
0.7
0.7
0.6
0.4
0.3
0.2
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

95
95
96
96
96
96
96
98
98
98
98
98
98
98
98
96
96
96
95
95
93
95
95
95

Pressure (mb)

1022
1022
1022
1023
1023
1023
1022
1022
1022
1022
1022
1022
1022
1022
1022
1021
1021
1022
1021
1021
1021
1021
1021
1021

Ozone (du)

385
386
388
389
391
392
393
394
395
395
394
391
390
389
389
388
388
388
386
385
384
381
377
374

Thursday 16

Waning Crescent 0%

05:40

19:00

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
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad

Sun - Rise: 06:03, Set: 19:57, Transit: 13:01. Moon - Rise: 05:40, Set: 19:00. Civil Dark: 20:32 - 05:28. Nautical Dark: 21:14 - 04:46. Astro Dark: 22:02 - 03:58

Total Clouds (% Sky Obscured)

93
90
90
91
92
91
89
88
90
93
95
84
72
60
54
51
53
64
77
86
81
75
62
56

Low Clouds (% Sky Obscured)

79
77
73
71
72
64
55
45
46
47
44
38
32
26
30
44
49
44
40
32
35
37
36
30

Medium Clouds (% Sky Obscured)

78
84
74
75
71
61
53
43
48
53
58
46
38
40
45
51
53
64
77
86
81
74
62
56

High Clouds (% Sky Obscured)

76
51
30
30
37
29
20
22
25
24
14
4
3
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 (%)

34
29
31
26
10
20
17
3
8
8
0
0
0
0
1
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
6
5
5
5
5
4
4
4
4
4
4
4
4
4
4
4
6
5
5
5
6
6
8

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

8
8
8
7
7
6
6
6
6
4
4
4
3
3
3
8
8
9
10
10
11
17
16
16

Dew Point (°C)

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

Relative Humidity (%)

95
95
95
95
93
93
93
93
93
93
94
94
91
88
85
76
68
60
54
49
43
43
43
42

Pressure (mb)

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

Ozone (du)

372
369
367
365
363
360
358
356
353
354
354
355
356
357
357
358
359
361
360
360
360
360
360
360

Friday 17

New Moon 2%

05:59

20:28

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

Sun - Rise: 06:01, Set: 19:59, Transit: 13:01. Moon - Rise: 05:59, Set: 20:28. Civil Dark: 20:33 - 05:26. Nautical Dark: 21:16 - 04:43. Astro Dark: 22:04 - 03:55

Total Clouds (% Sky Obscured)

53
38
27
17
10
13
15
17
15
13
11
9
8
7
20
37
54
66
77
87

Low Clouds (% Sky Obscured)

26
23
15
9
3
3
3
3
2
3
2
2
2
2
14
27
42
41
36
27

Medium Clouds (% Sky Obscured)

53
38
25
14
5
8
11
16
12
11
6
5
3
0
2
3
3
13
22
28

High Clouds (% Sky Obscured)

1
1
1
1
1
1
1
1
1
1
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

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 (%)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

15
13
12
11
10
8
8
7
6
6
6
5
6
7
8
10
12
13
14
14

Feels Like (°C)

16
17
17
11
10
10
9
9
8
6
6
6
5
5
6
9
10
10
11
12

Dew Point (°C)

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

Relative Humidity (%)

48
55
64
69
76
82
84
85
87
86
86
86
83
79
77
68
61
54
53
52

Pressure (mb)

1021
1021
1021
1021
1022
1022
1022
1022
1022
1022
1022
1022
1022
1023
1023
1022
1022
1022
1021
1021

Ozone (du)

361
362
362
363
364
366
367
368
369
369
369
369
370
372
373
375
376
377
378
378

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

Generated: 11/04/26 18:10:48. Forecast: 11/04/26 to 17/04/26. Timezone: UTC+2.00