Clear Outside v1.0 - International Weather Forecasts For Astronomers

Saturday 22

Waxing Crescent 5%

10:55

16:57

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

Sun - Rise: 07:28, Set: 16:09, Transit: 11:48. Moon - Rise: 10:55, Set: 16:57. Civil Dark: 16:45 - 06:52. Nautical Dark: 17:25 - 06:11. Astro Dark: 18:04 - 05:33

Total Clouds (% Sky Obscured)

72
62
53
46
52
6
42
28
33
33
3
2
0
0
0
0
0
0
0
0
0
0
0
0

Low Clouds (% Sky Obscured)

37
37
29
21
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
2
2
0
2
2
2
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

0
0
4
29
52
6
42
28
33
33
3
0
0
0
0
0
0
0
0
0
0
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 (%)

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

Chance of Frost

Temperature (°C)

-1
-1
-1
-2
-2
-3
-3
-3
-4
-4
-5
-5
-5
-5
-5
-6
-6
-6
-6
-6
-5
-3
-2
-1

Feels Like (°C)

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

Dew Point (°C)

-9
-9
-8
-8
-8
-8
-8
-9
-9
-9
-9
-10
-10
-10
-10
-11
-11
-11
-11
-11
-11
-12
-12
-13

Relative Humidity (%)

54
52
55
62
64
65
67
66
66
68
69
67
67
67
69
67
67
66
66
65
59
49
44
40

Pressure (mb)

1027
1027
1027
1027
1027
1027
1026
1026
1026
1026
1025
1025
1024
1024
1023
1023
1022
1022
1021
1021
1021
1020
1019
1018

Ozone (du)

330
330
328
324
321
318
315
310
308
307
306
307
303
301
299
296
294
293
288
289
288
288
286
286

Sunday 23

Waxing Crescent 10%

11:34

17:54

13 Good
14 Good
15 Good
16 Good
17 Good
18 Good
19 Good
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
09 Bad
10 Bad
11 Bad
12 Bad

Sun - Rise: 07:30, Set: 16:08, Transit: 11:48. Moon - Rise: 11:34, Set: 17:54. Civil Dark: 16:44 - 06:53. Nautical Dark: 17:25 - 06:13. Astro Dark: 18:03 - 05:34

Total Clouds (% Sky Obscured)

0
0
4
4
1
0
16
17
16
38
60
100
100
100
100
100
100
100
100
100
99
92
86
87

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
1
12
92
100
100
93
89
90
79
77
86
75
84
77
59

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
9
14
16
38
58
57
88
100
100
98
50
26
50
50
87
57
58
70

High Clouds (% Sky Obscured)

0
0
4
4
1
0
7
6
7
34
44
34
40
100
63
100
100
89
100
100
99
78
76
76

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
0
0
0
1
7
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
Snow
Snow
Snow
Snow
None
None
None
None
None
None
None
None

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
0
3
76
95
95
57
28
11
0
0
2
0
0
0

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0.6
1
1.2
0.2
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

4
4
5
5
4
4
5
4
5
5
5
5
4
4
5
5
5
4
4
4
4
5
4
4

Chance of Frost

Temperature (°C)

-0
0
-0
-2
-2
-3
-3
-4
-4
-4
-4
-4
-3
-3
-4
-3
-2
-2
-1
-1
-0
1
2
2

Feels Like (°C)

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

Dew Point (°C)

-13
-13
-12
-12
-12
-13
-13
-13
-14
-14
-14
-14
-14
-13
-5
-4
-3
-3
-2
-2
-2
-1
1
1

Relative Humidity (%)

36
36
40
44
47
46
47
47
46
45
46
47
44
44
91
96
94
92
92
92
91
92
93
91

Pressure (mb)

1017
1016
1015
1014
1014
1013
1012
1011
1010
1009
1008
1007
1006
1006
1005
1005
1004
1004
1004
1004
1004
1004
1004
1003

Ozone (du)

287
288
287
288
289
288
289
289
286
285
284
278
276
273
273
277
280
280
281
282
284
284
286
286

Monday 24

Waxing Crescent 16%

12:03

19:01

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
09 Bad
10 Bad
11 Bad
12 Bad

Sun - Rise: 07:31, Set: 16:07, Transit: 11:49. Moon - Rise: 12:03, Set: 19:01. Civil Dark: 16:43 - 06:54. Nautical Dark: 17:24 - 06:14. Astro Dark: 18:03 - 05:35

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
97
95
98
100
100
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

58
56
56
58
50
70
94
77
80
88
88
76
73
67
60
57
81
70
73
61
52
42
40
34

Medium Clouds (% Sky Obscured)

100
100
100
100
100
100
67
89
52
39
63
95
100
97
99
100
100
100
100
100
100
100
100
100

High Clouds (% Sky Obscured)

76
100
100
85
100
7
4
74
75
75
76
75
51
91
100
100
93
81
20
57
53
59
75
100

ISS Passover

Visibility (miles)

9
9
8
9
9
9
9
9
9
8
8
9
9
9
9
9
9
9
9
5
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
Frozen rai
None
Snow
Snow
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

2
40
31
17
14
21
29
57
41
31
35
21
5
1
0
0
0
0
0
0
0
0
0
0

Precipitation Amount (mm)

0
0
0
0
0
0
0
0.5
0
0.1
0.2
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

3
2
2
2
2
2
2
1
1
1
1
1
1
1
0
0
-1
-1
-1
-1
0
1
1
2

Feels Like (°C)

0
-1
-1
-1
-2
-2
-2
-2
-3
-2
-2
-2
-2
-3
-2
-3
-3
-3
-3
-3
-3
-2
-2
-2

Dew Point (°C)

2
1
1
1
1
1
1
1
1
0
0
-0
0
-0
-1
-1
-1
-1
-1
-1
-1
-1
-1
-0

Relative Humidity (%)

93
93
94
94
94
96
96
94
96
94
96
94
94
94
94
94
94
94
96
96
94
92
89
88

Pressure (mb)

1002
1002
1002
1002
1002
1002
1002
1002
1003
1002
1002
1002
1003
1003
1003
1003
1003
1003
1004
1004
1004
1004
1005
1004

Ozone (du)

285
285
287
291
292
290
288
289
289
291
294
294
294
296
294
294
294
296
297
298
301
304
306
306

Tuesday 25

Waxing Crescent 24%

12:25

20:15

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
09 Bad
10 Bad
11 Bad
12 Bad

Sun - Rise: 07:33, Set: 16:06, Transit: 11:49. Moon - Rise: 12:25, Set: 20:15. Civil Dark: 16:43 - 06:56. Nautical Dark: 17:23 - 06:15. Astro Dark: 18:02 - 05:36

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
99
98
97
98
99
100
100
100
100
100
100
100
100
100
100
97
93
91

Low Clouds (% Sky Obscured)

46
44
53
48
42
65
52
60
61
72
78
84
82
83
83
83
84
87
90
91
91
91
91
86

Medium Clouds (% Sky Obscured)

100
100
100
100
100
100
97
95
91
93
96
100
100
100
100
100
100
100
100
100
100
91
83
76

High Clouds (% Sky Obscured)

85
70
56
62
74
82
71
59
47
42
42
42
38
33
33
46
64
79
60
41
18
10
13
10

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
5
0
0
0
0
0
0
0
1
4
4
2
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
Snow
Snow
Very Light Rain
None
None
None

Precipitation Probability (%)

0
0
0
1
2
2
4
6
6
13
28
32
24
39
45
43
41
38
45
48
57
43
44
45

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.1
0.1
0.2
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
1
1
2
2
2
2

Feels Like (°C)

-0
-1
-1
-2
-3
-3
-3
-3
-3
-3
-3
-3
-3
-3
-3
-3
-3
-3
-3
-3
-4
-4
-3
-3

Dew Point (°C)

0
1
0
0
-0
-0
-0
-1
-1
-1
-0
0
1
1
1
1
1
1
1
1
1
0
1
1

Relative Humidity (%)

88
91
93
93
93
93
93
91
91
91
93
94
98
98
100
98
98
98
98
96
94
91
91
89

Pressure (mb)

1004
1004
1005
1005
1005
1005
1005
1005
1006
1006
1006
1007
1006
1007
1007
1008
1008
1009
1009
1010
1011
1012
1012
1012

Ozone (du)

303
302
304
304
307
311
313
315
318
319
319
317
316
315
314
313
314
315
315
315
316
317
318
318

Wednesday 26

Waxing Crescent 34%

12:42

21:31

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
09 Bad
10 Bad
11 Bad
12 Bad

Sun - Rise: 07:34, Set: 16:05, Transit: 11:49. Moon - Rise: 12:42, Set: 21:31. Civil Dark: 16:42 - 06:57. Nautical Dark: 17:23 - 06:16. Astro Dark: 18:01 - 05:38

Total Clouds (% Sky Obscured)

93
97
99
99
99
99
99
98
97
96
95
94
93
93
93
93
93
92
90
87
85
82
80
81

Low Clouds (% Sky Obscured)

84
86
84
86
86
87
84
82
79
83
85
87
85
85
84
86
87
88
82
76
69
58
48
37

Medium Clouds (% Sky Obscured)

85
91
97
97
97
97
95
93
91
83
76
70
62
64
70
51
30
8
5
2
0
4
6
6

High Clouds (% Sky Obscured)

15
15
15
15
15
15
15
15
20
25
30
28
35
46
48
35
28
22
25
33
47
65
80
81

ISS Passover

Visibility (miles)

9
7
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 (%)

35
40
28
29
26
26
20
16
14
12
13
22
20
18
16
14
11
4
9
7
2
5
5
2

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

Chance of Frost

Temperature (°C)

3
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
1
1
1
2
3
3
4

Feels Like (°C)

-3
-3
-3
-3
-4
-4
-4
-4
-4
-4
-3
-3
-3
-3
-3
-3
-3
-3
-2
-3
-3
-3
-2
-3

Dew Point (°C)

1
0
1
1
0
0
0
0
0
0
0
0
0
0
-0
-1
-1
-1
-1
-1
-1
-1
-2
-2

Relative Humidity (%)

86
86
89
91
89
89
89
91
91
91
88
86
88
86
85
83
83
84
86
83
79
76
71
64

Pressure (mb)

1013
1013
1014
1015
1016
1016
1017
1018
1018
1019
1019
1020
1020
1021
1021
1021
1022
1022
1022
1023
1023
1023
1023
1022

Ozone (du)

318
318
318
319
320
321
322
323
325
327
327
329
330
329
329
329
330
331
332
330
327
325
324
323

Thursday 27

Waxing Crescent 44%

12:57

22:48

13 Bad
14 Bad
15 Bad
16 Bad
17 OK
18 OK
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

Sun - Rise: 07:36, Set: 16:04, Transit: 11:50. Moon - Rise: 12:57, Set: 22:48. Civil Dark: 16:41 - 06:58. Nautical Dark: 17:22 - 06:18. Astro Dark: 18:01 - 05:39

Total Clouds (% Sky Obscured)

86
76
71
56
42
35
49
64
76
85
91
96
97
97
98
98
98
98
99
99
99
99
98
98

Low Clouds (% Sky Obscured)

37
35
37
29
20
13
23
34
49
62
68
70
72
78
85
85
86
87
87
88
89
91
92
95

Medium Clouds (% Sky Obscured)

14
22
33
25
23
18
38
56
71
79
88
96
93
89
84
89
94
98
97
96
96
78
60
42

High Clouds (% Sky Obscured)

59
36
12
19
28
35
29
23
17
15
14
15
27
43
60
49
41
36
35
36
37
31
22
5

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
6
3
0
3
6
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
Snow
Snow
Snow
Snow
None
None
None
None

Precipitation Probability (%)

2
2
0
0
0
0
2
7
9
15
16
17
23
26
17
44
56
63
58
53
44
45
43
34

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

4
4
3
2
2
2
1
2
2
2
2
2
2
2
2
2
2
2
2
2
3
3
4
4

Feels Like (°C)

-2
1
1
0
0
0
-1
-2
-2
-2
-3
-3
-3
-4
-4
-3
-4
-3
-3
-4
-3
-3
-2
-3

Dew Point (°C)

-3
-3
-3
-3
-2
-2
-2
-2
-2
-2
-2
-2
-1
-1
-1
-1
0
1
2
1
1
2
2
2

Relative Humidity (%)

59
63
67
70
73
77
81
78
78
78
78
78
79
79
80
82
86
91
96
93
89
88
86
86

Pressure (mb)

1022
1022
1022
1022
1022
1022
1022
1022
1022
1022
1022
1021
1021
1021
1021
1021
1021
1021
1021
1021
1021
1021
1021
1021

Ozone (du)

323
322
321
321
320
318
317
314
311
308
305
302
299
296
293
291
290
289
288
287
287
286
286
286

Friday 28

First Quarter 55%

12:57

00:06

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: 07:37, Set: 16:04, Transit: 11:50. Moon - Rise: 12:57, Set: 00:06. Civil Dark: 16:41 - 07:00. Nautical Dark: 17:21 - 06:19. Astro Dark: 18:00 - 05:40

Total Clouds (% Sky Obscured)

99
99
100
99
98
97
92
87
84
82
87
85
85
85
85
78
68
74

Low Clouds (% Sky Obscured)

96
99
100
98
97
97
92
87
84
82
76
66
59
49
38
35
42
40

Medium Clouds (% Sky Obscured)

32
23
18
15
10
7
6
5
5
8
11
15
24
35
44
56
68
74

High Clouds (% Sky Obscured)

5
5
2
1
1
0
0
0
0
0
0
3
5
11
14
12
5
8

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 (%)

35
31
28
34
33
29
28
26
9
14
7
0
0
0
0
2
5
2

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)

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

Chance of Frost

Temperature (°C)

4
4
4
5
5
5
5
5
4
4
4
4
4
4
4
4
4
4

Feels Like (°C)

-2
-0
0
0
-0
-0
0
1
0
0
0
1
0
0
0
0
0
0

Dew Point (°C)

2
3
3
3
3
3
3
3
3
3
3
3
2
3
2
3
3
2

Relative Humidity (%)

86
88
88
89
89
89
89
91
91
93
91
93
91
93
91
93
93
91

Pressure (mb)

1021
1021
1021
1021
1021
1021
1021
1021
1021
1021
1021
1021
1020
1020
1020
1020
1020
1020

Ozone (du)

285
284
283
282
281
280
279
280
280
281
281
281
281
281
281
281
280
279

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

Generated: 22/11/25 13:54:53. Forecast: 22/11/25 to 28/11/25. Timezone: UTC+1.00