Clear Outside v1.0 - International Weather Forecasts For Astronomers

Monday 29

Waxing Gibbous 72%

12:00

03:18

08 Good
09 OK
10 OK
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 OK
05 Good
06 Good
07 Good

Sun - Rise: 08:00, Set: 16:07, Transit: 12:04. Moon - Rise: 12:00, Set: 03:18. Civil Dark: 16:45 - 07:22. Nautical Dark: 17:27 - 06:41. Astro Dark: 18:06 - 06:01

Total Clouds (% Sky Obscured)

3
19
25
72
74
69
88
96
100
99
100
100
100
100
95
97
98
100
100
93
10
0
0
1

Low Clouds (% Sky Obscured)

3
19
25
72
74
69
88
91
100
99
100
100
100
100
90
92
93
97
67
66
10
0
0
0

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
8
22
0
39
41
42
50
50
51
0
0
0
0

High Clouds (% Sky Obscured)

3
5
5
31
33
17
33
29
7
5
6
6
29
6
1
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
0
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
Very Light Rain
Snow
None
None
None
None
None
None

Precipitation Probability (%)

0
0
0
1
1
1
1
1
1
5
4
14
18
26
30
40
55
49
35
10
6
0
0
0

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

4
4
5
6
7
7
8
9
9
9
10
11
11
11
12
13
13
12
11
9
11
10
8
8

Chance of Frost

Temperature (°C)

-6
-5
-3
0
1
2
2
2
2
2
2
2
2
2
2
2
1
1
0
0
-1
-1
-2
-3

Feels Like (°C)

-8
-8
-5
-3
-2
-2
-2
-3
-3
-4
-3
-4
-4
-4
-4
-4
-5
-6
-5
-5
-6
-5
-5
-5

Dew Point (°C)

-16
-15
-14
-11
-9
-6
-4
-2
-2
-2
-2
-2
-2
-3
-3
-3
-3
-3
-0
-3
-5
-6
-7
-8

Relative Humidity (%)

46
42
41
41
47
56
65
73
78
78
76
74
73
70
68
73
74
78
96
78
72
71
69
67

Pressure (mb)

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

Ozone (du)

293
289
287
286
280
279
280
281
284
289
289
288
286
285
284
285
286
284
290
298
303
304
310
320

Tuesday 30

Waxing Gibbous 82%

12:21

04:48

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

Sun - Rise: 08:00, Set: 16:08, Transit: 12:04. Moon - Rise: 12:21, Set: 04:48. Civil Dark: 16:46 - 07:22. Nautical Dark: 17:28 - 06:41. Astro Dark: 18:07 - 06:01

Total Clouds (% Sky Obscured)

3
8
8
20
35
26
30
65
87
30
65
79
47
35
60
79
53
11
32
32
35
18
50
60

Low Clouds (% Sky Obscured)

2
7
8
20
35
26
30
57
41
30
58
71
47
35
52
62
44
2
20
21
25
2
50
60

Medium Clouds (% Sky Obscured)

0
0
0
0
2
1
1
2
44
2
0
0
0
11
17
14
0
0
3
2
2
14
47
56

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
4
8
3
4
4
0
0
0

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
7
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
1
2
2
18
26
42
22
5
1
2
1
3
6
15
3
1
1
2
0
2
12
11

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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-9
-9
-9
-10
-9
-8
-7
-7
-6
-6
-7
-7
-8
-8
-8
-8
-8
-9
-9
-9
-8
-8
-10
-10

Relative Humidity (%)

62
59
57
52
52
55
60
63
72
70
67
69
68
68
68
71
69
65
64
69
73
70
64
63

Pressure (mb)

1022
1023
1023
1023
1023
1023
1023
1023
1023
1023
1023
1024
1024
1024
1024
1024
1024
1024
1024
1023
1023
1023
1022
1022

Ozone (du)

338
344
351
352
352
352
352
354
356
357
359
363
367
369
370
365
359
356
355
353
349
344
343
339

Wednesday 31

Waxing Gibbous 90%

12:51

06:17

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
07 Bad

Sun - Rise: 08:00, Set: 16:09, Transit: 12:05. Moon - Rise: 12:51, Set: 06:17. Civil Dark: 16:47 - 07:22. Nautical Dark: 17:29 - 06:41. Astro Dark: 18:08 - 06:01

Total Clouds (% Sky Obscured)

94
100
97
95
97
94
94
100
100
98
100
97
100
99
99
96
97
98
99
100
99
98
95
89

Low Clouds (% Sky Obscured)

64
76
93
88
95
87
90
95
100
92
100
95
100
98
96
92
93
86
79
72
70
65
58
58

Medium Clouds (% Sky Obscured)

25
100
84
83
88
84
79
94
99
84
49
17
53
47
37
39
48
51
48
60
53
38
61
52

High Clouds (% Sky Obscured)

0
4
4
5
3
7
4
74
75
0
0
0
3
8
4
4
11
22
47
55
58
62
59
40

ISS Passover

Visibility (miles)

9
9
9
9
1
5
9
9
6
0
0
1
1
3
0
0
0
2
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
Snow
None
None
None
None
None
Snow
Snow
Snow
Snow
Snow
None
Snow
Snow
Snow
None
None
None
None
None
None
None

Precipitation Probability (%)

16
35
59
57
62
51
36
35
58
58
54
52
47
39
44
48
54
35
33
40
37
29
16
16

Precipitation Amount (mm)

0
0
0.2
0
0
0
0
0
0.2
0.3
0.2
0.2
0.1
0
0.1
0.2
0.2
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

11
11
13
15
18
20
20
22
21
19
18
16
14
13
12
11
10
13
14
14
13
13
12
13

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-10
-11
-10
-9
-6
-5
-5
-4
-4
-2
-1
-1
-0
-1
0
0
0
-1
-1
-2
-2
-2
-2
-2

Relative Humidity (%)

60
58
56
58
70
71
67
67
71
89
92
92
94
91
96
98
98
89
86
83
80
81
83
81

Pressure (mb)

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

Ozone (du)

337
338
339
337
334
334
337
336
332
332
332
330
328
330
329
330
329
325
325
323
320
318
309
308

Thursday 1

Waxing Gibbous 96%

13:34

07:34

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
07 Bad

Sun - Rise: 08:00, Set: 16:10, Transit: 12:05. Moon - Rise: 13:34, Set: 07:34. Civil Dark: 16:48 - 07:22. Nautical Dark: 17:30 - 06:41. Astro Dark: 18:09 - 06:01

Total Clouds (% Sky Obscured)

81
70
72
52
61
91
95
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
96

Low Clouds (% Sky Obscured)

60
42
42
46
41
49
52
56
57
39
36
38
35
43
68
71
48
40
35
33
29
24
21
24

Medium Clouds (% Sky Obscured)

15
2
3
0
0
18
33
60
70
76
86
100
100
100
100
96
99
96
99
100
100
100
100
93

High Clouds (% Sky Obscured)

25
22
24
16
30
71
85
100
100
100
100
100
100
100
100
100
100
100
100
100
68
40
10
15

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 (%)

11
1
1
1
0
0
0
0
0
0
0
1
2
0
3
5
4
8
7
3
2
2
0
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)

13
14
14
15
15
15
15
14
13
14
14
15
15
15
15
15
16
16
16
16
16
16
16
16

Chance of Frost

Temperature (°C)

1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0

Feels Like (°C)

-5
-5
-5
-5
-4
-4
-5
-5
-5
-5
-6
-6
-6
-6
-6
-6
-6
-6
-6
-6
-6
-6
-6
-7

Dew Point (°C)

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

Relative Humidity (%)

81
83
77
74
74
74
73
71
73
74
75
75
74
74
74
74
73
71
73
74
73
71
73
71

Pressure (mb)

1013
1013
1012
1011
1010
1009
1009
1008
1007
1006
1006
1005
1005
1004
1004
1003
1002
1002
1002
1002
1002
1002
1002
1002

Ozone (du)

309
308
310
311
306
303
302
308
318
327
331
337
355
400
406
403
406
408
405
399
390
383
382
382

Friday 2

Waxing Gibbous 100%

14:36

No Set

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
07 Bad

Sun - Rise: 08:00, Set: 16:11, Transit: 12:06. Moon - Rise: 14:36, Set: No Set. Civil Dark: 16:49 - 07:22. Nautical Dark: 17:31 - 06:41. Astro Dark: 18:10 - 06:01

Total Clouds (% Sky Obscured)

93
91
92
94
95
94
93
92
86
80
74
100
100
100
98
97
95
97
98
100
100
100
100
90

Low Clouds (% Sky Obscured)

24
25
26
27
27
30
33
36
27
22
18
22
25
31
28
25
22
29
35
42
56
66
77
67

Medium Clouds (% Sky Obscured)

86
80
82
85
88
89
89
89
65
33
18
52
65
77
82
86
88
86
84
87
84
82
77
61

High Clouds (% Sky Obscured)

15
15
15
15
15
14
4
15
25
30
50
75
75
75
80
90
95
97
97
100
100
100
100
70

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
6
3
0
0
0
0

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
Snow
Snow
Snow
Snow
Snow

Precipitation Probability (%)

2
3
8
9
6
7
6
3
3
2
0
1
1
1
2
2
1
21
30
35
41
48
53
46

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-6
-7
-6
-6
-5
-4
-4
-4
-4
-5
-5
-5
-5
-4
-5
-5
-5
-5
-5
-5
-5
-5
-6
-5

Dew Point (°C)

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

Relative Humidity (%)

73
73
70
69
68
68
69
70
73
74
75
78
78
78
78
78
78
80
84
91
96
98
98
98

Pressure (mb)

1002
1002
1003
1003
1003
1002
1003
1003
1003
1004
1004
1004
1004
1004
1004
1004
1004
1003
1003
1003
1003
1002
1002
1002

Ozone (du)

381
381
378
377
377
374
370
364
357
350
348
347
332
318
303
298
292
287
290
293
297
293
289
285

Saturday 3

Full Moon 99%

15:54

08:32

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
07 Bad

Sun - Rise: 08:00, Set: 16:12, Transit: 12:06. Moon - Rise: 15:54, Set: 08:32. Civil Dark: 16:50 - 07:22. Nautical Dark: 17:32 - 06:41. Astro Dark: 18:11 - 06:01

Total Clouds (% Sky Obscured)

77
61
59
52
50
63
85
100
100
100
100
100
100
100
100
100
100
100
100
99
99
100
100
100

Low Clouds (% Sky Obscured)

56
48
45
43
45
45
45
50
54
58
62
49
28
20
13
6
2
23
41
55
50
45
43
47

Medium Clouds (% Sky Obscured)

62
55
59
52
50
63
85
100
95
92
91
95
99
100
100
100
100
99
99
98
95
93
78
66

High Clouds (% Sky Obscured)

36
9
9
10
20
48
72
98
99
98
100
100
100
100
100
100
100
100
99
97
74
57
32
49

ISS Passover

Visibility (miles)

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

Snow
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
Snow
Snow

Precipitation Probability (%)

37
24
27
30
31
26
20
6
8
7
1
1
1
0
1
2
1
19
24
25
34
39
44
47

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

96
98
96
98
98
98
98
100
98
98
98
98
96
92
92
94
92
94
94
94
96
96
96
96

Pressure (mb)

1002
1002
1002
1002
1001
1001
1001
1001
1001
1001
1001
1001
1001
1001
1000
1000
1000
1000
999
999
999
999
999
999

Ozone (du)

288
290
293
294
295
296
299
302
304
311
317
323
330
337
345
346
347
348
343
337
332
329
326
322

Sunday 4

Waning Gibbous 96%

17:22

09:13

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

Sun - Rise: 08:00, Set: 16:13, Transit: 12:07. Moon - Rise: 17:22, Set: 09:13. Civil Dark: 16:51 - 07:22. Nautical Dark: 17:33 - 06:40. Astro Dark: 18:12 - 06:01

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

53
58
53
49
49
57
62
66
69
71
74
66
57
47
38
29
20

Medium Clouds (% Sky Obscured)

63
60
71
83
95
94
95
95
95
93
81
76
75
75
62
51
35

High Clouds (% Sky Obscured)

73
100
100
100
100
100
100
100
68
33
0
0
0
0
0
0
0

ISS Passover

Visibility (miles)

6
7
7
6
6
5
4
2
0
2
4
6
4
2
0
2
3

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
None
None
None
None
None
None
None
None

Precipitation Probability (%)

48
49
53
56
59
55
50
46
38
29
16
13
9
2
2
2
0

Precipitation Amount (mm)

0.2
0.2
0.2
0.2
0.3
0.2
0.2
0.2
0.1
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

96
94
92
94
96
98
98
98
98
98
100
98
98
98
98
96
98

Pressure (mb)

999
1000
1000
1000
999
999
999
999
1000
1000
1000
1000
1001
1002
1002
1003
1003

Ozone (du)

319
316
312
314
315
316
319
322
325
326
327
328
330
331
333
332
331

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

Generated: 29/12/25 08:13:30. Forecast: 29/12/25 to 04/01/26. Timezone: UTC+1.00