Clear Outside v1.0 - International Weather Forecasts For Astronomers

Sunday 23

Waxing Crescent 10%

10:55

17:54

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

Sun - Rise: 07:30, Set: 16:08, Transit: 11:48. Moon - Rise: 10:55, 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)

19
15
12
9
0
37
4
4
0
1
0
20
66
100
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
1
42
91
100
95
83
97
100
98
92
80

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
11
25
62
100
64
100
100
100
100
86
98
100
100

High Clouds (% Sky Obscured)

0
0
0
0
0
20
4
4
0
1
0
11
60
100
100
100
100
100
100
100
100
100
100
100

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
1
0
0
0
0
7
6
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 (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
20
72
78
62
54
21
5
7
3

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-8
-7
-5
-4
-3
-2
-4
-6
-7
-7
-7
-8
-8
-9
-10
-10
-9
-9
-8
-8
-8
-6
-6
-4

Dew Point (°C)

-15
-15
-15
-15
-14
-13
-13
-14
-14
-15
-15
-15
-15
-16
-16
-16
-16
-13
-5
-5
-4
-4
-4
-3

Relative Humidity (%)

50
44
39
35
34
38
41
44
44
44
45
45
46
45
46
45
42
52
94
92
94
89
89
91

Pressure (mb)

1020
1020
1019
1018
1017
1016
1015
1015
1014
1014
1013
1012
1011
1010
1008
1008
1007
1006
1006
1006
1005
1005
1005
1005

Ozone (du)

305
304
298
292
294
292
289
294
290
286
288
289
284
281
277
274
270
266
272
273
275
276
277
275

Monday 24

Waxing Crescent 16%

11:34

19:01

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
08 Bad
09 Bad

Sun - Rise: 07:31, Set: 16:07, Transit: 11:48. Moon - Rise: 11:34, 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
98
100
100
100
100
100
100
100
99
99
100
100
100
100
100
100
100
100
100
100
100
96
99

Low Clouds (% Sky Obscured)

66
83
72
65
74
85
82
75
76
82
89
69
76
79
85
92
97
100
95
91
85
84
85
88

Medium Clouds (% Sky Obscured)

93
87
69
100
80
99
100
100
99
85
95
99
98
100
100
100
100
100
100
100
100
98
79
85

High Clouds (% Sky Obscured)

100
71
100
100
100
100
100
98
100
65
77
85
59
100
100
100
100
100
100
88
65
100
15
84

ISS Passover

Visibility (miles)

9
9
9
9
9
0
0
0
0
0
0
6
9
7
0
0
0
0
0
0
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
88
81

Precipitation Type

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

Precipitation Probability (%)

0
0
0
7
47
66
55
41
35
39
25
10
5
36
73
81
69
76
86
65
67
50
38
25

Precipitation Amount (mm)

0
0
0
0
0.2
0.4
0.2
0
0
0.2
0
0
0
0.1
0.5
0.7
0.4
0.5
0.6
0.3
0.4
0.2
0.1
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

87
84
84
83
84
96
98
98
98
98
96
94
94
94
98
100
98
98
98
98
98
100
100
98

Pressure (mb)

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

Ozone (du)

274
271
273
275
275
277
276
275
275
277
279
283
285
286
289
291
294
296
296
294
294
296
299
298

Tuesday 25

Waxing Crescent 24%

12:03

20:15

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
08 Bad
09 Bad

Sun - Rise: 07:33, Set: 16:06, Transit: 11:49. Moon - Rise: 12:03, 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
99
100
100
100
100
100
100
98
98
98
97
96
99
100
98
99
99
99
98
97
98
98
99

Low Clouds (% Sky Obscured)

89
91
98
99
99
99
100
96
92
94
93
94
95
95
92
97
94
95
94
94
94
94
95
95

Medium Clouds (% Sky Obscured)

92
74
81
100
100
100
100
100
89
91
91
90
90
98
99
94
97
98
96
93
88
91
94
95

High Clouds (% Sky Obscured)

94
88
100
100
100
100
100
85
80
75
75
75
75
75
75
75
75
75
75
60
65
55
50
50

ISS Passover

Visibility (miles)

0
0
4
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Fog (%)

72
52
2
83
65
13
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

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

Precipitation Probability (%)

20
28
61
87
95
95
95
95
91
78
95
95
81
87
95
95
95
95
95
95
95
85
87
91

Precipitation Amount (mm)

0
0
0.4
0.8
0.9
0.8
0.9
1.1
0.7
0.4
0.7
0.6
0.4
0.4
0.6
0.6
0.6
0.6
0.7
0.7
0.6
0.4
0.5
0.5

Wind Speed/Direction (mph)

1
2
4
4
3
3
4
5
7
10
10
10
11
10
9
9
11
11
11
10
11
12
12
13

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

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

Pressure (mb)

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

Ozone (du)

298
299
296
295
296
299
302
303
304
305
308
309
312
314
314
313
312
310
309
309
309
310
312
313

Wednesday 26

Waxing Crescent 34%

12:25

21:31

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
08 Bad
09 Bad

Sun - Rise: 07:34, Set: 16:05, Transit: 11:49. Moon - Rise: 12:25, 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)

99
100
100
100
100
100
100
100
100
98
97
95
95
94
94
90
84
82
81
79
79
76
73
69

Low Clouds (% Sky Obscured)

96
96
96
95
94
93
89
85
82
81
80
81
76
74
68
66
72
77
74
70
68
72
72
69

Medium Clouds (% Sky Obscured)

97
99
100
100
100
100
99
99
98
95
92
87
84
81
77
55
33
9
16
23
31
20
11
0

High Clouds (% Sky Obscured)

35
20
15
15
15
15
15
30
40
45
46
46
41
40
40
32
1
3
1
0
1
0
0
0

ISS Passover

Visibility (miles)

0
0
0
0
0
0
0
0
1
0
0
5
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

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

Precipitation Probability (%)

82
78
79
79
73
69
60
63
64
60
54
33
31
30
12
13
13
5
10
10
5
9
11
8

Precipitation Amount (mm)

0.4
0.3
0.4
0.3
0.2
0.2
0
0.2
0.2
0.2
0.1
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

13
13
13
13
14
14
14
13
13
13
13
13
12
11
11
10
9
8
7
6
5
5
5
5

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

98
98
96
100
100
98
98
100
98
98
98
96
93
88
86
86
86
86
87
91
91
91
91
91

Pressure (mb)

1011
1012
1012
1013
1013
1014
1015
1016
1017
1018
1018
1019
1020
1021
1021
1022
1022
1023
1023
1024
1024
1025
1025
1026

Ozone (du)

313
313
313
312
310
309
310
313
315
315
317
317
318
321
325
327
327
327
326
324
324
324
325
325

Thursday 27

Waxing Crescent 44%

12:42

22:48

10 Bad
11 Bad
12 Bad
13 Bad
14 Bad
15 Bad
16 OK
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 OK

Sun - Rise: 07:36, Set: 16:04, Transit: 11:49. Moon - Rise: 12:42, 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)

69
54
53
53
49
45
36
72
66
77
77
77
81
85
71
66
59
53
49
47
45
43
41
37

Low Clouds (% Sky Obscured)

69
44
52
52
49
45
35
32
30
30
29
29
31
36
40
42
38
37
34
34
34
33
31
29

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
1
1
2

High Clouds (% Sky Obscured)

0
0
0
0
0
0
1
14
12
15
15
20
25
30
30
23
18
9
7
5
4
3
3
1

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
8
8
8
8
8
8
8
8
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 (%)

7
5
1
2
3
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
3
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2

Chance of Frost

Temperature (°C)

-0
0
1
1
1
-0
-2
-3
-4
-5
-5
-6
-6
-6
-7
-7
-7
-7
-7
-8
-8
-8
-7
-6

Feels Like (°C)

-4
-4
-1
-1
-1
-1
-2
-4
-6
-8
-8
-9
-10
-9
-10
-9
-9
-9
-9
-9
-10
-10
-9
-9

Dew Point (°C)

-2
-1
0
1
0
-1
-2
-4
-5
-6
-6
-6
-7
-7
-7
-8
-8
-8
-8
-8
-9
-9
-8
-7

Relative Humidity (%)

91
96
98
98
98
94
94
92
94
94
94
94
94
94
94
94
92
94
94
94
94
92
90
89

Pressure (mb)

1027
1027
1026
1026
1026
1027
1027
1028
1028
1029
1029
1029
1029
1029
1029
1029
1029
1029
1028
1028
1028
1028
1028
1028

Ozone (du)

323
320
314
311
311
311
312
310
310
307
306
305
304
303
303
303
303
303
303
302
301
300
300
300

Friday 28

First Quarter 55%

12:57

00:06

10 OK
11 OK
12 Good
13 Good
14 OK
15 OK
16 OK
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

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)

28
17
6
18
29
38
35
32
35
41
49
55
64
70
76
75
74
72
74
77
81
76
72
68

Low Clouds (% Sky Obscured)

21
12
3
12
20
31
35
32
35
41
49
55
64
70
76
75
74
72
74
76
79
76
72
68

Medium Clouds (% Sky Obscured)

1
1
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)

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

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
8
7
6
6
6
6
5
5
5
5
5
5
4
4
3
5
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 (%)

1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
4
7
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)

2
3
3
3
3
3
3
3
2
2
2
2
2
2
2
3
2
2
1
2
2
3
2
2

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-8
-8
-8
-7
-3
-3
-3
-3
-3
-4
-8
-8
-8
-9
-8
-9
-11
-11
-10
-11
-11
-11
-12
-12

Dew Point (°C)

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

Relative Humidity (%)

87
87
86
86
87
91
94
94
94
94
94
94
94
92
92
94
94
94
94
94
94
94
90
90

Pressure (mb)

1028
1028
1027
1026
1026
1026
1026
1026
1026
1026
1026
1026
1026
1026
1025
1025
1025
1025
1024
1024
1024
1024
1024
1024

Ozone (du)

300
300
300
301
302
303
303
304
304
305
305
305
305
307
308
310
311
312
313
315
317
319
319
319

Saturday 29

Waxing Gibbous 66%

13:10

01:25

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: 07:38, Set: 16:03, Transit: 11:50. Moon - Rise: 13:10, Set: 01:25. Civil Dark: 16:40 - 07:01. Nautical Dark: 17:21 - 06:20. Astro Dark: 18:00 - 05:41

Total Clouds (% Sky Obscured)

70
72
72
71
69
67
70
74
78
83
88
92
93
92
93
92
91
90
94
98
99

Low Clouds (% Sky Obscured)

69
66
65
63
59
49
47
46
45
53
62
73
73
76
80
83
88
90
94
96
99

Medium Clouds (% Sky Obscured)

0
0
0
1
2
2
3
5
6
5
4
4
3
3
3
7
11
15
10
6
1

High Clouds (% Sky Obscured)

1
2
2
11
19
26
23
19
11
15
18
21
31
41
53
62
71
79
62
45
24

ISS Passover

Visibility (miles)

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

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

4
4
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

Wind Speed/Direction (mph)

2
2
3
3
3
2
2
2
2
2
2
2
3
2
2
2
2
1
1
1
1

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-11
-11
-11
-10
-6
-7
-7
-8
-8
-8
-11
-11
-11
-11
-11
-11
-12
-11
-11
-11
-11

Dew Point (°C)

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

Relative Humidity (%)

89
90
89
87
90
92
92
94
94
94
94
94
94
94
94
94
92
92
90
90
90

Pressure (mb)

1023
1023
1022
1022
1021
1021
1021
1020
1020
1020
1020
1020
1020
1020
1019
1019
1019
1018
1018
1018
1018

Ozone (du)

319
319
319
319
319
318
317
317
316
315
315
315
315
315
314
314
315
315
316
319
322

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

Generated: 23/11/25 10:51:41. Forecast: 23/11/25 to 29/11/25. Timezone: UTC+1.00