Clear Outside v1.0 - International Weather Forecasts For Astronomers

Sunday 30

Waning Gibbous 91%

20:22

10:06

14 Bad
15 Bad
16 Bad
17 OK
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

Sun - Rise: 06:15, Set: 19:50, Transit: 13:02. Moon - Rise: 20:22, Set: 10:06. Civil Dark: 20:24 - 05:42. Nautical Dark: 21:05 - 05:00. Astro Dark: 21:51 - 04:15

Total Clouds (% Sky Obscured)

53
44
66
34
55
74
90
84
100
100
92
88
63
78
92
90
100
100
100
94
93
87
44
64

Low Clouds (% Sky Obscured)

26
28
12
23
7
12
0
9
18
23
43
25
22
39
30
0
42
54
90
74
76
45
32
42

Medium Clouds (% Sky Obscured)

17
0
0
0
10
19
25
33
38
46
49
42
47
41
41
53
100
100
100
87
59
38
19
24

High Clouds (% Sky Obscured)

6
44
5
15
39
63
79
67
100
100
73
65
28
43
81
75
100
100
100
50
32
2
0
0

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
3
7
9
6
4
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
Light Rain
Moderate Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
3
3
18
86
95
95
90
81
81
75
68

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.5
2.6
1.7
0.4
0.7
0.6
0.5
0.4

Wind Speed/Direction (mph)

13
12
12
11
9
5
4
5
4
4
4
4
4
3
2
2
2
5
2
4
4
6
7
10

Chance of Frost

Temperature (°C)

26
26
27
27
26
25
23
21
20
19
19
19
18
18
17
17
17
17
17
17
18
20
22
23

Feels Like (°C)

24
23
23
25
25
26
21
20
18
18
17
18
18
19
17
17
17
17
18
17
18
21
22
23

Dew Point (°C)

12
12
12
11
12
14
13
12
12
12
13
13
13
13
13
13
13
15
16
16
15
18
17
16

Relative Humidity (%)

42
39
40
38
41
50
53
57
61
64
68
70
72
74
76
77
77
86
92
90
85
86
74
62

Pressure (mb)

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

Ozone (du)

297
298
298
297
297
296
295
296
297
297
297
297
296
295
295
293
291
292
293
295
298
300
304
306

Monday 31

Waning Gibbous 84%

20:37

11:27

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

Sun - Rise: 06:17, Set: 19:48, Transit: 13:01. Moon - Rise: 20:37, Set: 11:27. Civil Dark: 20:21 - 05:43. Nautical Dark: 21:03 - 05:02. Astro Dark: 21:48 - 04:17

Total Clouds (% Sky Obscured)

32
24
28
10
14
8
10
33
27
23
5
0
8
1
0
0
4
26
44
82
100
95
89
82

Low Clouds (% Sky Obscured)

32
24
28
10
0
3
10
33
0
0
0
0
0
0
0
0
0
0
0
41
46
16
45
8

Medium Clouds (% Sky Obscured)

0
0
0
0
14
0
0
15
24
17
4
0
6
0
0
0
0
0
0
0
31
69
27
28

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2
24
40
60
100
82
40
36

ISS Passover

Visibility (miles)

8
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 (%)

33
4
1
0
0
0
0
0
12
2
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)

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

Chance of Frost

Temperature (°C)

24
25
25
25
24
23
21
19
18
18
17
17
16
16
15
15
15
15
16
17
19
20
21
22

Feels Like (°C)

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

Dew Point (°C)

15
12
9
9
10
12
11
11
11
12
12
11
11
11
11
11
11
11
11
11
11
10
10
9

Relative Humidity (%)

55
42
36
36
39
51
53
56
63
66
68
71
72
74
77
78
79
78
73
64
58
53
49
44

Pressure (mb)

1014
1014
1014
1014
1014
1014
1015
1016
1016
1017
1017
1018
1018
1018
1018
1018
1019
1019
1020
1020
1020
1020
1020
1020

Ozone (du)

308
309
309
308
309
308
313
318
320
325
326
326
326
324
319
316
315
313
311
311
311
312
312
312

Tuesday 1

Waning Gibbous 74%

20:55

12:51

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 OK
06 OK
07 OK
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad

Sun - Rise: 06:18, Set: 19:46, Transit: 13:01. Moon - Rise: 20:55, Set: 12:51. Civil Dark: 20:19 - 05:45. Nautical Dark: 21:00 - 05:04. Astro Dark: 21:45 - 04:20

Total Clouds (% Sky Obscured)

81
94
100
63
49
52
70
57
59
59
85
99
96
74
76
34
46
44
58
97
100
96
92
88

Low Clouds (% Sky Obscured)

25
36
18
20
12
16
8
0
0
16
31
30
36
37
32
34
46
44
56
45
33
42
49
58

Medium Clouds (% Sky Obscured)

23
15
16
3
13
0
9
0
9
32
65
46
17
61
20
22
34
21
16
11
33
54
69
40

High Clouds (% Sky Obscured)

24
83
100
25
15
28
44
33
30
34
63
96
87
36
41
3
0
0
28
78
100
75
50
30

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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

19
20
21
20
21
20
18
17
16
15
15
15
14
14
13
13
14
14
17
18
17
19
20
21

Dew Point (°C)

8
8
8
8
9
11
10
9
9
9
9
9
9
9
9
9
9
9
9
9
10
10
9
9

Relative Humidity (%)

40
37
36
36
42
49
53
57
61
63
65
66
68
70
71
75
75
74
68
61
55
50
46
42

Pressure (mb)

1020
1019
1019
1019
1019
1019
1020
1020
1021
1021
1021
1021
1021
1021
1021
1021
1022
1022
1022
1022
1023
1023
1022
1022

Ozone (du)

311
309
309
310
309
309
309
310
310
310
309
309
310
315
316
317
318
315
314
314
314
317
319
321

Wednesday 2

Waning Gibbous 63%

21:19

No Set

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 OK
05 OK
06 OK
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad

Sun - Rise: 06:20, Set: 19:43, Transit: 13:01. Moon - Rise: 21:19, Set: No Set. Civil Dark: 20:17 - 05:47. Nautical Dark: 20:58 - 05:06. Astro Dark: 21:42 - 04:22

Total Clouds (% Sky Obscured)

61
59
74
57
66
55
70
85
100
88
75
65
53
50
33
26
29
62
62
51
65
74
85
93

Low Clouds (% Sky Obscured)

46
37
34
24
12
8
7
9
11
15
18
21
13
7
0
0
0
0
0
0
0
0
0
1

Medium Clouds (% Sky Obscured)

20
9
3
5
8
10
10
15
49
48
50
54
44
35
24
23
22
20
20
22
24
27
27
26

High Clouds (% Sky Obscured)

22
43
65
47
47
30
50
75
100
74
66
63
43
28
6
2
3
44
42
30
40
55
70
83

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)

7
7
7
7
6
6
3
2
3
3
3
3
4
4
4
5
5
5
5
8
10
12
13
13

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

39
36
33
34
41
56
58
58
58
60
63
64
65
67
66
65
67
68
61
53
47
43
41
40

Pressure (mb)

1021
1021
1020
1020
1020
1020
1021
1021
1021
1022
1022
1021
1022
1021
1021
1021
1022
1022
1022
1022
1021
1021
1020
1020

Ozone (du)

322
320
315
310
307
306
305
305
304
303
303
303
303
301
301
300
297
296
295
295
294
293
291
291

Thursday 3

Waning Gibbous 52%

21:53

14:15

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
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad

Sun - Rise: 06:21, Set: 19:41, Transit: 13:00. Moon - Rise: 21:53, Set: 14:15. Civil Dark: 20:15 - 05:48. Nautical Dark: 20:55 - 05:08. Astro Dark: 21:40 - 04:24

Total Clouds (% Sky Obscured)

74
99
92
94
98
99
93
86
76
86
82
91
92
93
94
91
88
85
75
66
55
62
67
68

Low Clouds (% Sky Obscured)

18
35
57
47
45
44
30
17
0
12
26
39
42
45
48
59
69
80
64
48
32
42
50
47

Medium Clouds (% Sky Obscured)

31
43
63
52
80
88
83
58
43
56
75
90
85
81
76
59
49
38
36
34
35
44
52
57

High Clouds (% Sky Obscured)

65
96
74
87
82
60
84
71
55
51
9
9
16
23
26
24
23
22
16
12
13
10
7
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
1
0
17
21
19
39
47
48
36
23
4
3
2
1

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)

14
14
14
14
12
10
7
6
7
8
8
8
8
8
9
9
10
10
11
12
14
16
16
16

Chance of Frost

Temperature (°C)

24
25
25
25
23
22
21
20
20
19
19
19
18
18
18
18
18
19
19
21
22
24
25
26

Feels Like (°C)

21
22
20
22
21
19
19
19
19
17
17
17
17
17
17
17
17
16
16
18
18
18
19
19

Dew Point (°C)

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

Relative Humidity (%)

39
37
36
37
43
46
50
55
57
61
61
62
62
63
63
64
62
61
60
52
47
41
39
37

Pressure (mb)

1019
1019
1019
1018
1018
1018
1019
1019
1019
1019
1018
1018
1017
1017
1017
1016
1016
1016
1015
1015
1015
1015
1014
1014

Ozone (du)

292
291
291
291
291
291
291
291
291
290
290
290
288
287
287
286
285
285
284
285
285
285
284
283

Friday 4

Third Quarter 40%

22:41

15:34

14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 OK
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 OK
11 Bad
12 Bad
13 Bad

Sun - Rise: 06:23, Set: 19:39, Transit: 13:00. Moon - Rise: 22:41, Set: 15:34. Civil Dark: 20:13 - 05:50. Nautical Dark: 20:53 - 05:09. Astro Dark: 21:37 - 04:26

Total Clouds (% Sky Obscured)

67
67
71
59
46
27
29
26
25
25
25
30
43
52
60
60
66
47
35
33
29
36
41
51

Low Clouds (% Sky Obscured)

22
25
31
33
34
27
29
26
25
25
4
0
0
0
0
1
2
3
2
1
0
9
18
26

Medium Clouds (% Sky Obscured)

45
36
21
27
28
26
29
26
25
25
25
30
35
40
50
60
65
47
33
15
0
11
23
34

High Clouds (% Sky Obscured)

5
6
7
3
2
1
1
2
3
3
2
4
26
30
31
31
30
30
24
26
29
36
41
37

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
7
6
4
5
7
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
Light Rain
Light Rain
Light Rain
Very Light Rain
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

4
5
5
20
26
25
33
38
44
62
70
64
53
45
34
37
33
24
24
19
8
12
10
4

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0.2
0.4
0.5
0.4
0.2
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

17
13
12
14
10
8
5
4
3
4
4
4
5
5
5
5
6
7
9
11
13
15
16
17

Chance of Frost

Temperature (°C)

27
26
25
24
23
22
21
21
20
19
19
19
19
19
19
19
19
19
20
21
22
23
23
24

Feels Like (°C)

20
26
25
25
24
24
23
19
19
20
19
19
19
19
19
20
20
19
19
19
19
19
19
20

Dew Point (°C)

10
12
15
17
16
16
15
15
16
16
16
17
18
17
17
16
16
16
16
15
14
13
11
11

Relative Humidity (%)

34
43
53
65
66
67
67
71
76
81
85
88
92
89
86
85
84
82
81
70
60
51
47
43

Pressure (mb)

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

Ozone (du)

282
283
284
285
285
286
286
287
287
288
289
290
292
292
293
294
297
301
305
309
313
318
321
325

Saturday 5

Waning Crescent 28%

23:46

16:40

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 OK
04 OK
05 OK
06 OK
07 Bad

Sun - Rise: 06:24, Set: 19:37, Transit: 13:00. Moon - Rise: 23:46, Set: 16:40. Civil Dark: 20:10 - 05:51. Nautical Dark: 20:51 - 05:11. Astro Dark: 21:34 - 04:28

Total Clouds (% Sky Obscured)

48
47
51
56
64
74
72
68
67
67
67
67
47
36
23
32
40
50

Low Clouds (% Sky Obscured)

27
29
30
38
46
58
56
53
39
27
27
54
47
36
23
32
37
38

Medium Clouds (% Sky Obscured)

33
32
34
32
29
34
30
25
20
25
25
20
14
6
1
1
0
0

High Clouds (% Sky Obscured)

27
28
25
25
24
29
27
29
22
13
6
1
1
0
0
14
24
29

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 (%)

8
10
6
12
15
16
19
18
9
20
23
21
17
11
1
2
1
0

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)

18
17
16
15
13
11
10
9
8
7
7
7
7
6
5
5
4
4

Chance of Frost

Temperature (°C)

24
24
24
23
22
22
21
20
19
18
15
14
14
13
12
12
12
13

Feels Like (°C)

20
21
20
18
18
19
19
15
16
17
15
14
14
12
12
13
12
12

Dew Point (°C)

10
10
10
10
10
11
11
11
12
12
10
10
10
10
10
10
10
10

Relative Humidity (%)

40
41
42
42
46
50
54
57
62
67
70
74
78
80
83
86
83
80

Pressure (mb)

1017
1017
1017
1018
1018
1019
1019
1020
1021
1021
1022
1022
1023
1023
1024
1024
1025
1025

Ozone (du)

328
330
332
334
334
334
334
335
337
338
335
331
328
325
322
318
316
314

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

Generated: 30/08/26 14:18:23. Forecast: 30/08/26 to 05/09/26. Timezone: UTC+2.00