Clear Outside v1.0 - International Weather Forecasts For Astronomers

Thursday 28

Waxing Gibbous 94%

18:27

03:25

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

Sun - Rise: 04:58, Set: 20:58, Transit: 12:59. Moon - Rise: 18:27, Set: 03:25. Civil Dark: 21:41 - 04:16. Nautical Dark: 22:40 - 03:16. Astro Dark: 00:29 - 01:19

Total Clouds (% Sky Obscured)

3
3
4
6
17
16
10
8
35
12
9
20
21
16
11
14
37
44
37
26
27
30
6
8

Low Clouds (% Sky Obscured)

0
0
4
6
17
16
3
0
0
0
0
0
0
4
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
3
3
4
3
4
5
8
35
12
8
16
19
12
9
14
37
44
37
23
24
26
3
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

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)

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

Chance of Frost

Temperature (°C)

17
18
19
20
20
21
22
22
21
21
20
18
15
14
13
12
11
10
9
8
8
8
11
13

Feels Like (°C)

16
16
17
17
18
19
19
19
19
18
19
18
14
13
12
11
10
9
7
8
7
8
10
14

Dew Point (°C)

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

Relative Humidity (%)

59
52
47
44
42
41
39
40
41
46
52
61
59
60
62
65
67
69
72
74
77
74
66
61

Pressure (mb)

1024
1024
1024
1024
1024
1023
1023
1023
1023
1023
1023
1023
1024
1025
1025
1025
1026
1026
1026
1026
1026
1026
1027
1026

Ozone (du)

326
328
330
333
335
336
338
339
338
338
339
338
337
337
338
339
339
339
339
340
340
341
340
339

Friday 29

Waxing Gibbous 98%

19:39

03:47

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

Sun - Rise: 04:58, Set: 20:59, Transit: 12:59. Moon - Rise: 19:39, Set: 03:47. Civil Dark: 21:42 - 04:15. Nautical Dark: 22:42 - 03:15. Astro Dark: 00:39 - N/A

Total Clouds (% Sky Obscured)

6
26
17
21
10
8
4
1
2
7
20
4
16
37
91
100
100
100
100
100
100
100
90
100

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
5
29
35
12
18
30

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
21
43
57
25
91
77
88
85
100
89
82

High Clouds (% Sky Obscured)

4
23
13
15
7
5
4
1
2
6
17
4
13
28
89
100
100
100
100
100
100
98
80
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
Very Light Rain
None
None
None
None
None

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
10
37
7
14
7
23
13

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

16
18
20
21
22
23
24
24
24
24
24
22
19
17
15
14
13
13
13
13
13
14
15
17

Feels Like (°C)

17
19
21
21
22
23
23
24
24
25
25
23
19
18
16
13
12
11
11
11
10
14
15
16

Dew Point (°C)

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

Relative Humidity (%)

56
52
46
41
37
35
35
34
35
37
49
52
54
59
60
62
62
59
61
72
71
76
78
74

Pressure (mb)

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

Ozone (du)

339
339
340
340
338
338
339
341
342
341
339
339
339
339
340
340
339
339
337
338
342
343
344
345

Saturday 30

Waxing Gibbous 100%

20:49

04:17

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

Sun - Rise: 04:57, Set: 21:01, Transit: 12:59. Moon - Rise: 20:49, Set: 04:17. Civil Dark: 21:43 - 04:14. Nautical Dark: 22:44 - 03:13. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

100
100
87
70
86
50
29
26
36
13
0
41
56
51
48
42
50
50
62
93
98
58
94
82

Low Clouds (% Sky Obscured)

35
33
21
58
55
38
29
26
30
0
0
0
0
0
0
0
0
0
0
0
5
0
0
0

Medium Clouds (% Sky Obscured)

96
33
24
24
34
30
17
23
36
13
0
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

100
100
25
1
27
1
0
3
10
0
0
24
30
32
30
42
50
50
62
93
97
58
94
82

ISS Passover

Visibility (miles)

9
9
9
8
7
8
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
Very Light Rain
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

29
38
25
44
56
30
10
6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

3
6
8
14
16
17
16
16
14
14
11
8
7
5
5
5
4
4
3
3
3
3
2
3

Chance of Frost

Temperature (°C)

18
19
21
23
24
24
25
25
25
24
22
20
18
16
15
14
13
13
12
12
11
12
14
17

Feels Like (°C)

18
18
20
20
22
21
21
22
23
22
21
21
18
16
15
15
13
12
11
11
10
11
13
16

Dew Point (°C)

14
14
14
15
17
16
15
13
13
13
13
14
13
12
12
12
11
10
10
10
10
10
10
12

Relative Humidity (%)

76
75
63
61
61
59
53
47
47
51
57
67
71
75
79
83
84
86
87
88
90
87
80
75

Pressure (mb)

1019
1019
1018
1018
1017
1016
1016
1015
1015
1015
1015
1015
1016
1016
1017
1017
1017
1016
1016
1016
1016
1016
1016
1015

Ozone (du)

349
354
355
355
354
354
353
352
351
351
350
349
349
350
349
348
345
344
344
345
346
347
348
347

Sunday 31

Full Moon 100%

21:54

04:56

09 Bad
10 Bad
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
08 Bad

Sun - Rise: 04:56, Set: 21:02, Transit: 12:59. Moon - Rise: 21:54, Set: 04:56. Civil Dark: 21:44 - 04:13. Nautical Dark: 22:45 - 03:12. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

70
67
43
67
81
86
92
97
99
98
96
97
99
100
100
98
100
100
100
100
100
100
100
97

Low Clouds (% Sky Obscured)

0
0
0
0
0
10
21
38
61
58
58
59
67
74
73
54
56
70
63
82
80
78
72
64

Medium Clouds (% Sky Obscured)

0
0
9
15
28
59
72
61
56
94
89
95
97
100
100
95
86
100
100
100
99
97
91
89

High Clouds (% Sky Obscured)

66
52
20
16
15
43
72
97
75
53
48
67
82
97
86
71
100
100
100
100
96
100
100
64

ISS Passover

Visibility (miles)

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

Precipitation Probability (%)

0
0
0
1
2
8
12
32
58
63
45
54
63
76
72
67
55
94
95
95
95
95
95
95

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0.3
0.5
0.3
0.2
0
0.6
1.4
1.6
2.2
2.2
1.1
0.9

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

19
20
22
24
25
26
26
25
25
24
22
20
19
18
17
16
16
15
15
15
15
15
15
16

Feels Like (°C)

18
20
22
24
24
25
24
24
24
25
21
19
18
17
16
17
16
15
15
15
15
15
15
16

Dew Point (°C)

13
13
13
13
12
12
12
12
13
15
15
15
15
16
16
16
15
14
14
14
14
14
15
14

Relative Humidity (%)

69
63
56
50
46
43
43
44
45
56
67
72
78
88
93
95
93
93
93
95
95
93
95
87

Pressure (mb)

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

Ozone (du)

347
349
350
350
350
349
347
347
348
348
349
350
355
361
372
360
359
357
360
361
367
370
373
375

Monday 1

Waning Gibbous 97%

22:49

05:46

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

Sun - Rise: 04:55, Set: 21:03, Transit: 12:59. Moon - Rise: 22:49, Set: 05:46. Civil Dark: 21:46 - 04:12. Nautical Dark: 22:47 - 03:10. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

96
96
96
97
81
75
64
55
48
41
40
32
31
26
48
68
76
82
88
93
91
89
86
91

Low Clouds (% Sky Obscured)

43
39
45
50
53
45
36
28
16
7
1
0
2
2
2
0
0
5
7
9
5
3
0
0

Medium Clouds (% Sky Obscured)

88
84
85
85
81
64
55
42
28
13
2
5
10
14
10
5
0
0
0
0
7
14
23
17

High Clouds (% Sky Obscured)

37
10
5
10
0
0
0
1
22
41
40
32
29
11
31
52
74
78
83
86
83
83
84
91

ISS Passover

Visibility (miles)

9
9
9
9
9
9
5
5
5
4
7
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
None
None
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

95
66
71
79
83
80
73
71
78
72
36
2
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Amount (mm)

0.5
0
0
0.4
0.5
0.5
0.4
0.4
0.7
0.5
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

17
18
18
19
19
19
19
20
20
19
19
18
16
15
14
14
13
13
13
12
12
13
15
16

Feels Like (°C)

17
17
17
17
17
19
19
19
20
19
20
20
18
17
16
15
13
13
13
12
13
12
12
13

Dew Point (°C)

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

Relative Humidity (%)

81
71
63
59
61
61
59
60
64
69
77
81
87
89
89
89
89
90
90
90
90
87
84
81

Pressure (mb)

1014
1014
1015
1015
1015
1015
1015
1015
1015
1015
1015
1015
1015
1015
1015
1015
1015
1015
1014
1014
1014
1014
1013
1013

Ozone (du)

374
373
374
376
379
381
373
365
361
360
357
357
355
354
353
353
351
349
347
346
345
343
342
340

Tuesday 2

Waning Gibbous 94%

23:33

06:48

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
08 Bad

Sun - Rise: 04:55, Set: 21:04, Transit: 13:00. Moon - Rise: 23:33, Set: 06:48. Civil Dark: 21:47 - 04:11. Nautical Dark: 22:49 - 03:09. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

94
97
98
98
98
98
99
100
99
97
95
90
83
77
75
80
87
85
83
85
91
96
100
100

Low Clouds (% Sky Obscured)

0
0
6
11
19
13
7
2
4
7
10
6
3
1
14
27
40
41
43
44
51
57
60
57

Medium Clouds (% Sky Obscured)

9
1
6
10
9
29
49
69
72
75
78
78
77
77
75
80
87
85
83
85
91
96
97
97

High Clouds (% Sky Obscured)

94
97
95
91
88
92
96
100
98
96
94
68
41
15
16
17
23
20
22
28
49
74
100
99

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
Very Light Rain
None
None

Precipitation Probability (%)

0
0
0
0
0
4
3
2
4
4
1
12
23
36
56
57
41
50
53
23
43
48
41
56

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

18
19
21
22
23
24
24
25
25
24
23
22
21
19
18
17
17
16
16
16
15
16
16
16

Feels Like (°C)

18
18
18
19
19
20
24
24
24
24
24
25
21
20
20
20
20
19
15
14
14
14
14
15

Dew Point (°C)

13
13
13
13
12
12
12
12
12
13
14
16
15
15
14
14
15
14
14
14
14
14
15
15

Relative Humidity (%)

73
65
60
55
50
47
44
44
43
50
57
66
70
73
77
81
86
89
90
90
90
92
90
92

Pressure (mb)

1013
1012
1012
1011
1010
1010
1009
1008
1007
1007
1007
1007
1007
1007
1007
1007
1007
1007
1007
1007
1006
1007
1007
1007

Ozone (du)

340
340
340
341
342
343
342
341
340
342
344
346
346
346
346
347
349
351
354
357
360
362
364
366

Wednesday 3

Waning Gibbous 88%

00:06

07:57

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 Good
01 Good
02 OK
03 OK
04 OK
05 OK
06 OK
07 OK

Sun - Rise: 04:54, Set: 21:05, Transit: 13:00. Moon - Rise: 00:06, Set: 07:57. Civil Dark: 21:48 - 04:11. Nautical Dark: 22:50 - 03:08. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
78
57
35
36
36
31
21
8
2
10
19
27
32
30
39

Low Clouds (% Sky Obscured)

58
59
63
66
72
51
36
20
16
9
1
2
2
3
2
2
1
1
0
0
0
0
0

Medium Clouds (% Sky Obscured)

99
100
100
100
100
100
100
100
78
57
35
36
36
31
21
8
0
0
0
0
2
3
5

High Clouds (% Sky Obscured)

98
95
95
96
100
94
88
92
78
57
35
36
36
31
21
8
0
1
3
5
7
5
8

ISS Passover

Visibility (miles)

9
9
9
8
8
7
6
6
5
6
8
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

Precipitation Type

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

Precipitation Probability (%)

62
66
91
95
95
95
95
95
95
81
55
39
24
9
6
2
0
0
0
0
0
0
0

Precipitation Amount (mm)

0.2
0.3
0.5
0.9
1.1
1
1.1
1.1
0.7
0.4
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

16
16
15
15
15
15
15
15
16
16
16
17
17
17
16
16
15
15
11
10
11
10
10

Dew Point (°C)

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

Relative Humidity (%)

90
90
89
87
86
85
81
77
73
74
73
73
77
80
83
86
87
90
90
90
91
86
80

Pressure (mb)

1007
1007
1007
1008
1008
1008
1008
1007
1007
1007
1007
1007
1007
1008
1008
1008
1008
1008
1009
1009
1009
1009
1009

Ozone (du)

366
365
365
369
374
379
388
397
406
395
385
374
370
366
362
360
359
357
356
355
354
352
350

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

Generated: 28/05/26 09:53:44. Forecast: 28/05/26 to 03/06/26. Timezone: UTC+2.00