Clear Outside v1.0 - International Weather Forecasts For Astronomers

Monday 21

Waxing Gibbous 77%

17:09

00:15

00 Bad
01 Bad
02 Bad
03 OK
04 OK
05 OK
06 OK
07 Bad
08 OK
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

Sun - Rise: 06:47, Set: 19:02, Transit: 12:54. Moon - Rise: 17:09, Set: 00:15. Civil Dark: 19:34 - 06:15. Nautical Dark: 20:12 - 05:36. Astro Dark: 20:52 - 04:57

Total Clouds (% Sky Obscured)

60
52
50
29
32
38
40
54
39
95
81
73
82
65
80
67
67
66
73
65
89
88
42
61

Low Clouds (% Sky Obscured)

34
46
39
29
32
38
40
52
39
87
44
52
43
38
43
43
31
33
53
38
33
62
42
42

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
23
0
19
32
34
35
20
29
21
22
22
32
14
45
49
26
30

High Clouds (% Sky Obscured)

0
0
0
0
0
2
0
0
0
0
0
0
0
13
11
1
38
30
35
31
2
2
0
0

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
8
7
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
0
0
0
0
0
0
1
1
12
26
43
43
39
34
34
27
27
24
29
12
24
33
27

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
8
8
8
9
9
8
9
11
13
14
15
15
15
17
17
17
16
14
11
10
9
8
7

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

74
77
80
81
80
83
84
85
80
70
65
57
51
54
52
48
52
56
59
66
67
62
68
77

Pressure (mb)

1024
1025
1025
1026
1026
1026
1026
1026
1026
1026
1026
1026
1025
1025
1025
1024
1024
1024
1024
1024
1025
1025
1025
1025

Ozone (du)

329
332
329
324
325
327
327
328
331
334
335
336
336
335
332
330
328
327
327
328
326
323
323
323

Tuesday 22

Waxing Gibbous 85%

17:30

01:27

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

Sun - Rise: 06:48, Set: 19:00, Transit: 12:54. Moon - Rise: 17:30, Set: 01:27. Civil Dark: 19:32 - 06:16. Nautical Dark: 20:10 - 05:38. Astro Dark: 20:50 - 04:58

Total Clouds (% Sky Obscured)

55
12
39
92
44
35
28
56
60
66
68
67
74
65
65
58
59
50
27
43
65
71
78
66

Low Clouds (% Sky Obscured)

54
12
34
80
44
35
28
47
42
54
65
65
67
57
49
45
38
22
8
0
15
5
33
27

Medium Clouds (% Sky Obscured)

26
0
0
16
0
0
0
0
0
0
0
0
24
38
42
34
38
22
17
20
19
23
22
8

High Clouds (% Sky Obscured)

0
0
2
0
2
3
2
2
1
2
8
4
9
0
2
3
2
15
2
2
2
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 (%)

15
22
4
16
3
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
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
8
7
6
6
6
9
10
11
11
10
11
11
11
10
8
5
5
5
5
6

Chance of Frost

Temperature (°C)

12
11
11
10
10
10
9
9
10
11
13
14
15
15
16
16
16
16
15
14
12
12
11
11

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

81
83
84
84
81
85
90
93
81
68
64
58
55
50
47
43
43
43
50
59
59
59
59
59

Pressure (mb)

1025
1026
1026
1026
1026
1026
1026
1026
1027
1027
1027
1027
1027
1027
1026
1026
1026
1026
1026
1026
1027
1027
1027
1027

Ozone (du)

324
323
322
320
317
315
314
312
312
310
310
308
306
303
302
302
303
302
302
301
301
301
302
302

Wednesday 23

Waxing Gibbous 91%

17:47

02:42

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

Sun - Rise: 06:50, Set: 18:57, Transit: 12:54. Moon - Rise: 17:47, Set: 02:42. Civil Dark: 19:30 - 06:18. Nautical Dark: 20:08 - 05:40. Astro Dark: 20:47 - 05:00

Total Clouds (% Sky Obscured)

71
77
82
88
84
30
22
28
34
26
28
32
30
35
43
36
36
30
7
18
23
43
67
74

Low Clouds (% Sky Obscured)

20
37
55
65
76
3
2
1
19
0
0
12
30
35
43
36
36
30
5
0
0
0
0
0

Medium Clouds (% Sky Obscured)

16
20
20
29
24
30
21
28
28
25
23
22
15
18
21
18
20
16
3
13
17
22
24
32

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
3
3
2
2
2
3
3
3
4
1
3
4
15
29
46

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)

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

Chance of Frost

Temperature (°C)

11
10
10
10
10
9
9
8
9
11
13
15
16
17
17
18
18
18
17
15
13
13
12
11

Feels Like (°C)

8
7
7
7
7
7
8
8
9
11
13
15
16
16
16
17
17
17
17
15
13
12
12
10

Dew Point (°C)

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

Relative Humidity (%)

59
60
62
63
64
66
74
78
72
64
58
53
50
44
41
39
37
37
45
50
54
57
60
60

Pressure (mb)

1027
1027
1026
1026
1026
1026
1026
1026
1026
1027
1026
1026
1025
1025
1024
1024
1023
1023
1023
1023
1023
1023
1023
1022

Ozone (du)

301
300
299
297
296
295
296
296
295
295
297
297
297
297
297
297
298
298
297
296
295
294
292
291

Thursday 24

Waxing Gibbous 96%

18:02

03:57

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
21 Bad
22 Bad
23 Bad

Sun - Rise: 06:51, Set: 18:55, Transit: 12:53. Moon - Rise: 18:02, Set: 03:57. Civil Dark: 19:27 - 06:19. Nautical Dark: 20:05 - 05:41. Astro Dark: 20:45 - 05:02

Total Clouds (% Sky Obscured)

71
68
95
97
95
96
97
55
62
61
89
89
81
74
70
66
65
64
61
64
56
53
49
63

Low Clouds (% Sky Obscured)

1
0
9
16
23
32
42
54
59
61
64
61
55
49
48
42
39
39
35
35
28
26
19
19

Medium Clouds (% Sky Obscured)

36
44
42
40
41
93
92
48
51
49
76
72
65
57
51
46
45
42
38
38
37
3
4
3

High Clouds (% Sky Obscured)

62
68
73
55
32
46
36
53
39
20
3
26
31
30
30
27
0
35
42
41
4
39
35
57

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
8
5
8
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
0
0
0
0

Precipitation Type

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

Precipitation Probability (%)

0
0
6
9
14
32
45
60
54
54
51
27
25
28
39
34
36
36
16
1
0
0
0
2

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

10
10
10
8
8
8
8
8
11
11
13
11
11
12
13
13
14
14
13
12
11
10
11
10

Dew Point (°C)

4
4
3
3
3
4
4
4
5
4
4
5
8
10
12
13
13
13
13
12
11
11
10
10

Relative Humidity (%)

61
63
64
64
64
65
66
68
66
58
53
53
65
74
82
89
90
90
93
93
92
93
92
90

Pressure (mb)

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

Ozone (du)

290
290
290
289
290
292
296
299
302
304
305
306
306
307
305
304
303
300
296
293
291
291
291
291

Friday 25

Waxing Gibbous 98%

18:15

05:12

00 Bad
01 Bad
02 Bad
03 Bad
04 OK
05 OK
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

Sun - Rise: 06:53, Set: 18:53, Transit: 12:53. Moon - Rise: 18:15, Set: 05:12. Civil Dark: 19:25 - 06:21. Nautical Dark: 20:03 - 05:43. Astro Dark: 20:42 - 05:04

Total Clouds (% Sky Obscured)

81
93
81
43
29
36
45
57
63
63
63
73
99
93
91
89
87
84
81
77
85
92
99
80

Low Clouds (% Sky Obscured)

22
25
30
31
29
31
26
20
14
7
0
3
2
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

15
6
22
3
2
17
37
56
60
63
63
70
69
73
60
46
33
39
49
60
66
74
84
72

High Clouds (% Sky Obscured)

49
73
48
26
7
26
38
55
50
55
55
62
97
62
57
53
51
47
43
39
51
69
80
60

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
8
7
6

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 (%)

3
3
1
0
0
0
0
0
2
3
0
1
1
1
7
8
4
24
29
31
32
40
48
46

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

Chance of Frost

Temperature (°C)

11
11
10
10
9
9
9
9
9
11
13
14
15
16
17
17
17
17
16
15
14
13
12
12

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

90
88
87
88
91
91
91
93
88
81
72
64
60
56
56
56
57
57
64
72
82
84
87
90

Pressure (mb)

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

Ozone (du)

291
292
293
295
296
298
298
295
294
293
296
298
298
298
300
300
300
300
300
299
299
299
298
298

Saturday 26

Full Moon 99%

18:29

06:29

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
21 Bad
22 Bad
23 Bad

Sun - Rise: 06:55, Set: 18:51, Transit: 12:53. Moon - Rise: 18:29, Set: 06:29. Civil Dark: 19:23 - 06:22. Nautical Dark: 20:01 - 05:44. Astro Dark: 20:40 - 05:05

Total Clouds (% Sky Obscured)

64
55
57
59
52
69
70
74
70
66
66
64
63
61
57
52
48
55
58
54
66
77
90
90

Low Clouds (% Sky Obscured)

5
25
57
59
52
67
57
47
38
26
16
12
2
0
0
0
0
13
27
40
41
41
42
46

Medium Clouds (% Sky Obscured)

60
52
55
53
52
49
41
37
37
43
46
45
44
40
32
24
16
16
15
21
36
51
66
62

High Clouds (% Sky Obscured)

35
10
7
5
3
4
7
10
4
3
3
2
2
2
15
21
27
19
11
3
20
20
30
29

ISS Passover

Visibility (miles)

7
7
7
6
5
4
5
7
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 (%)

47
48
46
45
43
36
31
26
28
28
30
28
28
24
18
12
2
2
1
3
2
1
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)

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

Chance of Frost

Temperature (°C)

11
11
10
10
10
10
10
10
10
12
14
16
17
19
20
20
20
20
19
18
16
15
15
14

Feels Like (°C)

11
10
10
9
9
10
10
10
9
10
11
13
14
15
16
21
21
21
20
19
18
14
14
14

Dew Point (°C)

10
9
9
9
9
9
9
9
8
9
9
10
10
10
10
12
13
14
13
13
12
11
11
10

Relative Humidity (%)

91
90
90
91
93
93
93
91
90
81
74
67
62
57
52
57
61
66
70
73
78
77
76
75

Pressure (mb)

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

Ozone (du)

298
297
297
297
296
295
295
296
296
295
294
293
292
291
290
290
290
290
289
289
289
288
286
285

Sunday 27

Waning Gibbous 100%

18:44

07:48

Sun - Rise: 06:56, Set: 18:48, Transit: 12:52. Moon - Rise: 18:44, Set: 07:48. Civil Dark: 19:21 - 06:24. Nautical Dark: 19:58 - 05:46. Astro Dark: 20:37 - 05:07

Total Clouds (% Sky Obscured)

Low Clouds (% Sky Obscured)

Medium Clouds (% Sky Obscured)

High Clouds (% Sky Obscured)

ISS Passover

Visibility (miles)

Fog (%)

Precipitation Type

Precipitation Probability (%)

Precipitation Amount (mm)

Wind Speed/Direction (mph)

Chance of Frost

Temperature (°C)

Feels Like (°C)

Dew Point (°C)

Relative Humidity (%)

Pressure (mb)

Ozone (du)

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

Generated: 20/09/26 23:49:38. Forecast: 21/09/26 to 27/09/26. Timezone: UTC+2.00