Clear Outside v1.0 - International Weather Forecasts For Astronomers

Monday 15

Waning Crescent 30%

23:41

17:18

21 Bad
22 OK
23 OK
00 Bad
01 Bad
02 OK
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 OK
17 OK
18 OK
19 OK
20 Bad

Sun - Rise: 06:40, Set: 19:12, Transit: 12:56. Moon - Rise: 23:41, Set: 17:18. Civil Dark: 19:45 - 06:07. Nautical Dark: 20:24 - 05:29. Astro Dark: 21:07 - 04:48

Total Clouds (% Sky Obscured)

41
27
36
77
48
27
100
100
100
100
100
100
94
44
52
88
86
87
87
18
27
20
33
44

Low Clouds (% Sky Obscured)

34
26
21
29
34
0
0
0
0
23
26
23
25
25
37
34
28
22
8
2
21
5
12
4

Medium Clouds (% Sky Obscured)

0
4
20
0
0
0
0
0
0
0
0
0
0
0
0
24
20
28
30
13
27
20
33
44

High Clouds (% Sky Obscured)

13
24
8
31
23
27
100
100
100
100
100
100
93
38
31
70
65
65
65
3
0
0
0
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 (%)

5
6
7
11
6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2
3
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)

8
8
9
9
12
12
10
10
11
12
12
13
15
17
18
19
19
20
19
18
16
14
11
11

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

18
18
17
16
16
15
13
11
10
10
9
10
11
11
12
13
12
12
12
12
14
14
13
12

Dew Point (°C)

17
16
16
15
13
13
11
11
9
9
10
9
9
8
7
7
6
6
7
7
7
7
7
6

Relative Humidity (%)

89
88
85
85
81
79
78
79
75
76
79
73
68
60
51
47
45
44
47
48
50
51
54
57

Pressure (mb)

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

Ozone (du)

273
275
276
277
276
277
278
278
279
282
284
285
289
293
295
296
299
301
301
302
301
301
300
301

Tuesday 16

Waning Crescent 20%

01:00

17:47

21 OK
22 OK
23 Bad
00 Bad
01 OK
02 OK
03 OK
04 Good
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 Bad
19 Bad
20 Bad

Sun - Rise: 06:41, Set: 19:10, Transit: 12:56. Moon - Rise: 01:00, Set: 17:47. Civil Dark: 19:43 - 06:09. Nautical Dark: 20:21 - 05:30. Astro Dark: 21:04 - 04:50

Total Clouds (% Sky Obscured)

35
40
49
46
21
31
19
5
23
40
43
96
84
95
84
92
98
100
100
94
88
77
58
61

Low Clouds (% Sky Obscured)

2
9
5
6
6
2
2
2
2
2
2
13
22
21
27
7
59
48
44
90
52
42
23
7

Medium Clouds (% Sky Obscured)

35
40
49
46
21
31
6
0
0
0
7
22
45
36
29
31
45
69
31
45
30
25
44
61

High Clouds (% Sky Obscured)

0
0
0
0
0
0
10
0
18
30
34
79
73
79
73
84
71
31
34
28
29
32
23
16

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 (%)

1
0
1
8
2
1
1
0
0
1
1
0
0
4
16
20
7
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)

12
13
13
13
12
12
12
11
11
10
10
10
12
12
14
13
13
13
10
11
10
9
7
6

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

6
6
7
7
8
7
8
8
8
8
8
7
7
7
7
6
6
6
7
7
6
7
7
7

Relative Humidity (%)

58
61
64
66
71
72
77
79
81
83
84
77
68
58
54
50
47
46
50
50
49
53
58
63

Pressure (mb)

1018
1019
1019
1019
1019
1019
1019
1020
1020
1020
1021
1021
1021
1021
1021
1021
1021
1020
1020
1020
1020
1020
1020
1021

Ozone (du)

302
302
301
304
306
306
305
307
310
306
299
292
286
283
280
276
274
271
268
266
264
263
261
261

Wednesday 17

Waning Crescent 12%

02:21

18:08

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 OK
16 OK
17 OK
18 OK
19 OK
20 OK

Sun - Rise: 06:43, Set: 19:08, Transit: 12:55. Moon - Rise: 02:21, Set: 18:08. Civil Dark: 19:40 - 06:10. Nautical Dark: 20:19 - 05:32. Astro Dark: 20:59 - 04:52

Total Clouds (% Sky Obscured)

58
52
52
52
97
100
99
90
94
100
100
98
87
97
76
94
79
70
42
35
36
34
33
40

Low Clouds (% Sky Obscured)

8
48
52
52
97
100
94
90
94
100
85
85
82
80
58
65
70
56
29
23
22
22
20
21

Medium Clouds (% Sky Obscured)

58
52
52
52
62
60
53
53
39
44
97
51
31
36
26
85
36
37
37
35
36
34
33
40

High Clouds (% Sky Obscured)

2
1
4
4
4
1
4
5
3
0
0
3
0
0
0
0
0
0
0
0
0
0
0
1

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

Precipitation Probability (%)

0
16
18
50
32
37
84
79
31
27
13
7
3
2
0
0
0
1
2
2
2
2
1
4

Precipitation Amount (mm)

0
0
0
0.3
0
0.2
0.9
0.7
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

7
7
8
9
9
8
8
9
9
9
9
9
10
10
11
11
13
12
11
11
11
13
14
14

Relative Humidity (%)

63
65
72
75
76
71
70
71
76
74
71
71
70
65
68
59
62
52
50
48
47
57
72
78

Pressure (mb)

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

Ozone (du)

259
258
258
260
258
257
257
257
256
255
254
253
254
254
254
253
253
252
251
251
251
251
251
250

Thursday 18

Waning Crescent 6%

03:41

18:24

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

Sun - Rise: 06:44, Set: 19:06, Transit: 12:55. Moon - Rise: 03:41, Set: 18:24. Civil Dark: 19:38 - 06:12. Nautical Dark: 20:16 - 05:34. Astro Dark: 20:56 - 04:53

Total Clouds (% Sky Obscured)

43
42
39
36
33
29
22
16
11
7
4
11
17
24
30
34
35
34
33
36
35
34
32
9

Low Clouds (% Sky Obscured)

20
19
21
23
23
15
8
0
1
1
2
9
15
21
27
31
32
29
28
29
20
11
2
2

Medium Clouds (% Sky Obscured)

43
42
39
36
33
27
19
16
11
7
0
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
2
2
1
0
1
1
0
0
0
1
2
10
10
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 (%)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

19
19
19
19
18
19
18
18
17
17
17
17
19
21
22
23
25
26
26
27
26
24
21
19

Dew Point (°C)

14
14
14
14
14
14
14
14
13
13
13
13
13
13
13
12
12
12
12
12
12
13
13
13

Relative Humidity (%)

78
79
81
82
85
86
87
87
89
89
89
83
73
66
59
52
47
44
42
41
44
52
58
64

Pressure (mb)

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

Ozone (du)

250
250
249
248
247
247
247
246
245
245
246
247
248
247
246
246
245
246
246
246
246
246
246
247

Friday 19

Waning Crescent 2%

04:58

18:36

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

Sun - Rise: 06:46, Set: 19:03, Transit: 12:55. Moon - Rise: 04:58, Set: 18:36. Civil Dark: 19:36 - 06:14. Nautical Dark: 20:14 - 05:35. Astro Dark: 20:54 - 04:55

Total Clouds (% Sky Obscured)

3
2
9
14
20
22
24
26
24
22
23
14
9
0
9
18
30
28
27
34
40
48
53
34

Low Clouds (% Sky Obscured)

1
0
8
14
19
22
24
26
24
22
23
13
6
0
1
2
4
3
3
3
2
1
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
1
1
2
1

High Clouds (% Sky Obscured)

1
1
1
1
1
1
1
1
1
0
0
0
0
0
3
4
4
19
27
34
40
36
29
5

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)

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

Chance of Frost

Temperature (°C)

19
18
17
16
15
15
14
14
14
14
14
15
17
19
21
23
24
26
26
27
27
25
23
21

Feels Like (°C)

19
19
18
18
17
16
16
15
15
16
16
17
18
19
20
21
21
22
29
28
27
27
28
28

Dew Point (°C)

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

Relative Humidity (%)

68
71
73
78
82
83
86
86
87
89
89
83
74
67
60
54
49
45
44
43
43
50
58
69

Pressure (mb)

1025
1025
1025
1025
1025
1025
1025
1024
1024
1024
1024
1024
1025
1025
1025
1024
1023
1022
1022
1021
1020
1020
1020
1020

Ozone (du)

247
247
247
247
247
248
248
248
248
248
247
248
248
249
249
249
249
248
247
246
245
245
244
244

Saturday 20

Waning Crescent 0%

06:11

18:48

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

Sun - Rise: 06:47, Set: 19:01, Transit: 12:54. Moon - Rise: 06:11, Set: 18:48. Civil Dark: 19:33 - 06:15. Nautical Dark: 20:12 - 05:37. Astro Dark: 20:51 - 04:57

Total Clouds (% Sky Obscured)

19
5
9
14
19
23
24
25
33
42
53
42
31
17
12
7
4
3
3
4
8
12
24
37

Low Clouds (% Sky Obscured)

0
0
5
10
13
17
21
23
21
20
18
14
12
2
2
1
0
0
0
0
0
0
0
2

Medium Clouds (% Sky Obscured)

1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
9

High Clouds (% Sky Obscured)

1
1
1
1
2
3
3
1
7
13
18
12
6
0
0
0
0
1
2
3
7
12
16
17

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
6
4

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
Light Rain
Light Rain

Precipitation Probability (%)

0
0
2
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
9
18
37
70
71

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
0.5
0.4

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

20
19
17
17
16
15
15
15
14
15
15
15
17
19
21
23
24
26
26
27
27
25
22
20

Feels Like (°C)

20
20
20
20
20
19
16
16
16
16
16
15
17
18
19
20
20
22
29
28
28
29
28
29

Dew Point (°C)

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

Relative Humidity (%)

71
75
76
78
79
79
80
82
82
82
80
79
71
64
58
54
50
46
46
45
45
54
64
77

Pressure (mb)

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

Ozone (du)

243
243
243
242
241
240
241
241
242
243
243
244
244
245
245
245
245
246
247
249
251
251
252
252

Sunday 21

New Moon 0%

07:23

18:59

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

Sun - Rise: 06:49, Set: 18:59, Transit: 12:54. Moon - Rise: 07:23, Set: 18:59. Civil Dark: 19:31 - 06:17. Nautical Dark: 20:09 - 05:38. Astro Dark: 20:49 - 04:59

Total Clouds (% Sky Obscured)

52
73
58
45
28
45
58
69
49
41
34
24
17
13
39
67
96

Low Clouds (% Sky Obscured)

4
7
5
3
1
2
3
4
6
9
12
9
5
2
5
8
11

Medium Clouds (% Sky Obscured)

20
33
26
20
11
21
20
22
7
6
9
11
10
4
4
4
4

High Clouds (% Sky Obscured)

18
21
15
6
1
9
17
17
11
4
0
0
0
0
33
67
96

ISS Passover

Visibility (miles)

6
8
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

Precipitation Type

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

Precipitation Probability (%)

70
68
60
48
31
24
16
4
3
2
0
0
0
0
0
0
0

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

1
3
5
4
4
4
3
3
3
2
1
1
0
1
2
3
3

Chance of Frost

Temperature (°C)

20
19
18
18
17
17
17
17
17
17
17
17
18
20
21
22
23

Feels Like (°C)

20
21
21
21
21
21
19
19
18
18
18
18
19
21
21
23
23

Dew Point (°C)

16
17
16
16
16
16
15
15
15
15
15
15
15
15
15
15
15

Relative Humidity (%)

81
85
86
88
90
93
90
90
89
89
89
87
82
76
69
65
60

Pressure (mb)

1014
1015
1015
1015
1015
1016
1015
1015
1015
1015
1015
1016
1015
1015
1015
1015
1014

Ozone (du)

252
253
253
253
254
254
255
256
256
257
258
258
258
258
258
258
258

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

Generated: 15/09/25 21:40:23. Forecast: 15/09/25 to 21/09/25. Timezone: UTC+2.00