Clear Outside v1.0 - International Weather Forecasts For Astronomers

Thursday 18

Waning Crescent 12%

03:41

18:08

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

Sun - Rise: 06:44, Set: 19:08, Transit: 12:55. Moon - Rise: 03:41, Set: 18:08. Civil Dark: 19:40 - 06:12. Nautical Dark: 20:19 - 05:34. Astro Dark: 20:59 - 04:53

Total Clouds (% Sky Obscured)

94
94
96
94
57
35
42
45
42
41
35
30
18
15
14
19
17
15
11
3
0
2
2
3

Low Clouds (% Sky Obscured)

85
80
65
45
8
5
42
45
42
41
35
30
18
15
14
19
17
15
11
3
0
0
0
0

Medium Clouds (% Sky Obscured)

68
94
71
55
50
30
23
15
2
0
0
0
1
3
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

0
17
3
2
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2
2
3

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 (%)

48
45
38
5
0
1
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
5
5
5
7
8
9
9
9
9
8
5
5
5
5
5
4
4
4
4
4
4
4
3

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

11
11
11
13
15
18
20
22
23
23
23
23
21
20
19
18
17
18
17
16
16
15
15
15

Dew Point (°C)

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

Relative Humidity (%)

79
74
74
76
68
53
47
44
42
41
43
51
60
63
65
67
71
72
73
74
75
76
78
78

Pressure (mb)

1023
1023
1023
1024
1023
1023
1023
1022
1022
1022
1021
1022
1022
1023
1023
1024
1024
1025
1025
1025
1025
1025
1025
1026

Ozone (du)

256
255
255
254
254
253
250
250
249
249
248
248
248
249
249
249
250
250
250
248
248
248
249
249

Friday 19

Waning Crescent 6%

04:58

18:24

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

Sun - Rise: 06:46, Set: 19:06, Transit: 12:55. Moon - Rise: 04:58, Set: 18:24. Civil Dark: 19:38 - 06:14. Nautical Dark: 20:16 - 05:35. Astro Dark: 20:56 - 04:55

Total Clouds (% Sky Obscured)

5
1
9
5
5
0
6
16
16
17
30
65
5
6
8
13
19
55
12
14
12
6
2
5

Low Clouds (% Sky Obscured)

0
0
0
0
5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
14
12
6
2
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)

5
1
8
5
3
0
5
13
14
16
28
65
3
5
7
9
19
55
12
3
0
1
0
2

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)

3
3
3
4
4
4
5
4
4
3
3
3
4
4
4
4
3
4
3
3
3
3
3
4

Chance of Frost

Temperature (°C)

14
15
17
19
21
23
24
25
26
26
26
25
22
20
19
18
17
17
16
15
15
14
14
13

Feels Like (°C)

15
16
18
20
22
23
25
26
26
27
28
26
21
21
20
19
18
17
15
16
16
16
15
15

Dew Point (°C)

10
10
10
10
10
10
10
10
10
10
10
11
11
10
10
10
10
10
10
10
10
10
10
10

Relative Humidity (%)

79
71
62
55
48
43
40
37
35
35
35
43
47
50
56
60
63
66
67
70
73
75
78
80

Pressure (mb)

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

Ozone (du)

249
251
252
252
252
253
253
253
253
253
252
253
253
253
254
254
255
255
255
254
253
252
252
251

Saturday 20

Waning Crescent 2%

06:11

18:36

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

Sun - Rise: 06:47, Set: 19:03, Transit: 12:55. Moon - Rise: 06:11, Set: 18:36. Civil Dark: 19:36 - 06:15. Nautical Dark: 20:14 - 05:37. Astro Dark: 20:54 - 04:57

Total Clouds (% Sky Obscured)

6
56
27
45
0
0
9
50
36
46
29
13
23
44
55
45
48
76
26
42
61
76
77
36

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
6
12
18
18
19

Medium Clouds (% Sky Obscured)

2
56
27
45
0
0
0
50
28
24
0
3
15
10
0
0
0
21
8
5
2
0
13
21

High Clouds (% Sky Obscured)

2
25
8
15
0
0
4
25
12
19
15
6
3
44
55
45
48
70
22
32
43
50
34
8

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)

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

Chance of Frost

Temperature (°C)

13
14
16
18
21
23
24
26
27
27
27
26
23
22
21
20
19
18
18
17
17
16
16
16

Feels Like (°C)

14
16
18
20
23
24
25
27
28
28
29
28
25
24
22
20
19
19
18
19
17
17
16
16

Dew Point (°C)

10
11
11
11
12
12
11
11
11
11
11
13
13
13
13
13
13
13
13
13
13
13
13
13

Relative Humidity (%)

82
78
68
62
56
50
44
40
37
36
37
45
51
56
62
67
68
71
72
76
78
79
81
81

Pressure (mb)

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

Ozone (du)

251
250
250
250
250
248
249
249
248
248
248
249
249
251
251
251
251
250
251
252
251
251
250
249

Sunday 21

New Moon 0%

No Rise

18:48

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

Sun - Rise: 06:49, Set: 19:01, Transit: 12:54. Moon - Rise: No Rise, Set: 18:48. Civil Dark: 19:33 - 06:17. Nautical Dark: 20:12 - 05:38. Astro Dark: 20:51 - 04:59

Total Clouds (% Sky Obscured)

39
34
34
32
25
25
11
10
5
5
6
7
8
6
4
1
3
6
8
30
53
79
95
91

Low Clouds (% Sky Obscured)

19
14
7
0
0
0
0
0
0
0
2
3
5
4
2
0
0
0
0
15
30
48
54
59

Medium Clouds (% Sky Obscured)

38
34
34
32
25
17
10
7
5
4
3
2
0
0
0
0
0
1
1
16
33
50
57
61

High Clouds (% Sky Obscured)

9
6
3
1
1
5
2
2
0
1
2
2
2
2
2
1
3
5
7
30
53
79
65
34

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
3
4

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)

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

Chance of Frost

Temperature (°C)

16
16
18
20
22
23
25
26
26
27
27
25
23
22
21
20
19
18
18
17
17
16
16
16

Feels Like (°C)

17
18
20
22
23
25
26
27
28
27
28
27
24
23
23
22
20
19
19
19
18
18
18
16

Dew Point (°C)

13
12
12
12
12
12
12
12
11
11
12
13
14
14
14
13
13
13
13
13
13
13
13
12

Relative Humidity (%)

82
77
67
60
53
49
44
41
39
37
38
48
57
62
64
65
67
70
73
74
77
78
79
79

Pressure (mb)

1016
1016
1016
1016
1015
1015
1014
1013
1013
1012
1011
1011
1011
1011
1011
1011
1010
1010
1010
1010
1009
1009
1009
1010

Ozone (du)

248
248
249
249
249
249
249
249
249
250
250
251
251
252
252
252
251
251
252
253
252
253
253
254

Monday 22

Waxing Crescent 0%

07:23

18:59

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
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad

Sun - Rise: 06:50, Set: 18:59, Transit: 12:54. Moon - Rise: 07:23, Set: 18:59. Civil Dark: 19:31 - 06:18. Nautical Dark: 20:09 - 05:40. Astro Dark: 20:49 - 05:01

Total Clouds (% Sky Obscured)

100
100
99
81
65
55
56
99
99
99
99
99
64
66
76
82
82
82
84
87
90
93
95
97

Low Clouds (% Sky Obscured)

70
69
59
54
45
37
30
28
36
71
71
38
19
40
48
56
54
52
50
47
45
43
40
41

Medium Clouds (% Sky Obscured)

61
62
69
71
65
55
53
48
47
42
49
51
53
40
54
67
66
71
70
76
81
85
88
92

High Clouds (% Sky Obscured)

10
15
15
6
2
2
2
17
19
25
21
34
15
14
9
5
10
17
23
38
50
60
57
52

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 (%)

2
6
10
15
20
21
19
19
22
36
27
21
14
6
7
4
9
14
6
8
7
4
8
8

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

82
75
66
60
55
51
47
44
43
44
54
60
66
68
69
69
68
74
79
84
84
84
84
84

Pressure (mb)

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

Ozone (du)

255
257
259
259
259
259
260
259
260
260
260
262
263
264
265
266
267
267
268
268
269
269
270
271

Tuesday 23

Waxing Crescent 3%

08:34

19:11

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
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad

Sun - Rise: 06:52, Set: 18:57, Transit: 12:54. Moon - Rise: 08:34, Set: 19:11. Civil Dark: 19:29 - 06:20. Nautical Dark: 20:07 - 05:42. Astro Dark: 20:47 - 05:02

Total Clouds (% Sky Obscured)

99
98
98
98
98
98
99
98
97
97
97
98
98
92
83
70
62
55
53
63
73
85
80
75

Low Clouds (% Sky Obscured)

41
60
74
82
81
80
77
78
79
81
81
83
86
78
59
47
48
48
51
50
50
51
47
46

Medium Clouds (% Sky Obscured)

97
80
63
47
54
61
69
63
59
54
60
61
53
42
23
11
4
5
5
5
5
4
19
29

High Clouds (% Sky Obscured)

44
14
7
9
29
49
72
74
74
70
71
75
79
58
37
16
10
5
0
23
43
63
57
56

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
8
8
7
6
5
6
8
9
9
8
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
None
None
None
None
None
None
None
None
None
None
None
Very Light Rain
None
None
None
None
None
None
Very Light Rain
Very Light Rain
Very Light Rain
Very Light Rain
None

Precipitation Probability (%)

5
6
5
1
3
4
2
8
12
13
36
48
57
53
47
40
43
47
54
59
62
63
55
44

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

5
5
4
3
3
4
5
7
7
7
8
5
3
2
2
3
4
4
5
5
5
5
6
5

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

12
12
11
12
12
12
12
12
12
12
12
13
13
14
13
13
13
13
12
12
12
12
11
11

Relative Humidity (%)

83
82
77
73
68
65
61
59
60
62
64
72
79
89
89
89
89
89
87
89
87
87
87
87

Pressure (mb)

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

Ozone (du)

272
273
273
274
274
274
273
273
273
274
274
276
279
281
282
284
286
287
288
289
290
292
293
295

Wednesday 24

Waxing Crescent 7%

09:45

19:25

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
00 Bad
01 Bad

Sun - Rise: 06:53, Set: 18:55, Transit: 12:53. Moon - Rise: 09:45, Set: 19:25. Civil Dark: 19:27 - 06:21. Nautical Dark: 20:05 - 05:43. Astro Dark: 20:44 - 05:04

Total Clouds (% Sky Obscured)

78
87
94
100
100
100
100
100
100
100
93
86
78
76
78
73
77
82
86

Low Clouds (% Sky Obscured)

43
51
56
66
61
57
48
47
51
49
54
59
64
61
59
61
66
71
77

Medium Clouds (% Sky Obscured)

48
68
80
89
93
96
99
95
93
92
93
86
78
71
60
45
40
40
35

High Clouds (% Sky Obscured)

47
46
52
59
72
85
98
74
51
21
46
73
78
76
78
73
77
82
86

ISS Passover

Visibility (miles)

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

Precipitation Type

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

Precipitation Probability (%)

28
23
16
7
17
30
49
44
40
42
44
46
47
57
61
63
74
74
72

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

86
83
80
78
75
67
59
53
52
50
48
52
58
63
64
66
67
71
74

Pressure (mb)

1013
1013
1013
1014
1014
1014
1014
1014
1014
1014
1014
1015
1016
1016
1017
1018
1018
1019
1019

Ozone (du)

297
299
301
304
306
307
308
308
310
311
312
317
321
326
325
324
322
322
321

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

Generated: 18/09/25 07:29:04. Forecast: 18/09/25 to 24/09/25. Timezone: UTC+2.00