Clear Outside v1.0 - International Weather Forecasts For Astronomers

Saturday 20

New Moon 0%

09:56

16:11

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 OK
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad

Sun - Rise: 08:18, Set: 16:21, Transit: 12:19. Moon - Rise: 09:56, Set: 16:11. Civil Dark: 16:59 - 07:40. Nautical Dark: 17:41 - 06:58. Astro Dark: 18:21 - 06:18

Total Clouds (% Sky Obscured)

69
76
81
100
100
100
100
93
100
100
100
100
68
53
35
64
85
100
100
100
100
100
99
100

Low Clouds (% Sky Obscured)

69
65
81
97
66
75
67
57
74
62
45
53
55
46
31
57
61
53
40
59
51
64
73
100

Medium Clouds (% Sky Obscured)

69
72
81
100
100
100
100
85
66
68
62
93
68
53
0
11
30
50
53
59
74
87
96
100

High Clouds (% Sky Obscured)

69
76
81
89
97
100
33
7
100
100
99
100
68
53
35
8
65
65
65
74
84
75
75
82

ISS Passover

Visibility (miles)

9
9
8
3
2
2
7
3
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
Very Light Rain
Very Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
None
None
None
None
None
None
None
None
None
Very Light Rain
Light Rain
Very Light Rain
Very Light Rain
None

Precipitation Probability (%)

10
62
89
95
95
95
95
93
68
59
43
29
40
19
7
13
10
13
23
67
82
65
74
66

Precipitation Amount (mm)

0
0.3
0.3
1.9
2.3
2.2
1.1
0.6
0.4
0.4
0
0
0
0
0
0
0
0
0
0.3
0.5
0.3
0.3
0

Wind Speed/Direction (mph)

24
27
28
29
28
26
24
20
15
13
12
11
10
11
10
10
11
11
9
7
7
5
5
7

Chance of Frost

Temperature (°C)

10
10
10
10
10
10
10
10
10
10
9
9
9
9
9
9
9
9
8
8
8
8
8
8

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

74
78
81
85
90
91
85
87
80
76
81
77
70
70
70
70
73
74
77
77
75
75
74
77

Pressure (mb)

1005
1004
1003
1001
1000
999
999
999
999
999
1000
1000
1001
1001
1001
1001
1002
1002
1002
1002
1003
1003
1003
1003

Ozone (du)

303
307
311
313
319
325
327
326
330
329
324
322
327
336
336
348
367
380
396
399
408
412
411
411

Sunday 21

Waxing Crescent 2%

09:56

17:17

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: 08:19, Set: 16:21, Transit: 12:20. Moon - Rise: 09:56, Set: 17:17. Civil Dark: 17:00 - 07:40. Nautical Dark: 17:42 - 06:58. Astro Dark: 18:21 - 06:19

Total Clouds (% Sky Obscured)

100
98
98
99
100
100
100
100
100
99
99
100
100
100
100
100
100
99
97
99
93
74
100
84

Low Clouds (% Sky Obscured)

49
55
59
58
60
61
86
85
79
67
71
68
63
52
63
66
83
86
83
73
58
57
52
62

Medium Clouds (% Sky Obscured)

100
64
71
62
100
100
88
80
92
97
90
93
100
100
100
100
100
75
71
86
59
42
92
76

High Clouds (% Sky Obscured)

82
88
79
94
100
100
100
100
52
81
95
100
100
100
99
100
71
50
26
43
7
60
70
63

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
8
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
3
0
0
0
0
0
0
0
0
0
0
54
55
90
100
100

Precipitation Type

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

Precipitation Probability (%)

66
64
56
60
61
66
77
74
55
37
31
34
31
51
62
75
73
62
53
37
22
18
6
5

Precipitation Amount (mm)

0
0.3
0
0
0
0.2
0.4
0.5
0
0
0
0
0
0
0.2
0.5
0.4
0.2
0.2
0
0
0
0
0

Wind Speed/Direction (mph)

9
11
13
12
11
10
9
7
6
5
4
5
4
5
7
6
7
5
7
7
7
8
5
3

Chance of Frost

Temperature (°C)

9
9
9
9
9
9
9
9
9
9
9
10
10
10
10
10
10
10
10
10
10
10
10
10

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

80
82
85
82
82
81
85
88
87
88
88
90
90
87
88
88
90
93
91
91
91
91
90
88

Pressure (mb)

1003
1003
1003
1002
1002
1002
1002
1002
1002
1002
1002
1002
1002
1002
1002
1002
1002
1002
1002
1002
1002
1002
1003
1003

Ozone (du)

411
413
413
412
407
402
400
400
401
402
403
404
403
403
405
405
406
409
410
408
408
402
398
395

Monday 22

Waxing Crescent 6%

10:27

18:29

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 OK
03 OK
04 Bad
05 Bad
06 Bad
07 OK
08 OK
09 OK

Sun - Rise: 08:19, Set: 16:22, Transit: 12:20. Moon - Rise: 10:27, Set: 18:29. Civil Dark: 17:01 - 07:40. Nautical Dark: 17:42 - 06:59. Astro Dark: 18:22 - 06:19

Total Clouds (% Sky Obscured)

100
100
98
87
72
88
94
93
96
96
98
99
87
75
49
53
39
46
78
45
47
27
24
33

Low Clouds (% Sky Obscured)

60
54
63
54
56
51
47
80
88
87
98
86
67
63
36
40
39
27
33
17
20
23
24
30

Medium Clouds (% Sky Obscured)

100
100
87
32
33
47
60
57
48
49
41
54
41
19
17
34
2
6
22
5
4
4
1
1

High Clouds (% Sky Obscured)

100
100
73
13
6
40
19
16
77
55
51
45
54
45
49
50
9
13
39
45
43
13
7
21

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 (%)

100
91
83
0
0
2
13
100
100
100
100
100
99
100
100
100
100
100
100
100
100
100
100
100

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
18
20
6
3
17
12
10
19
24
22
12
8
4
3
2
1
1
0
0
0
1
0
1

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

8
9
9
9
10
10
9
10
10
8
8
9
8
8
9
9
8
10
10
8
7
7
8
8

Dew Point (°C)

9
9
9
10
9
10
10
9
9
9
10
9
9
9
9
8
8
8
8
8
8
8
9
9

Relative Humidity (%)

88
88
88
88
87
88
91
91
91
91
93
91
91
91
90
88
87
87
87
88
90
90
91
91

Pressure (mb)

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

Ozone (du)

394
391
391
390
388
385
381
375
373
368
361
355
352
351
347
343
339
337
338
339
341
337
334
334

Tuesday 23

Waxing Crescent 12%

10:51

19:45

10 OK
11 Bad
12 OK
13 Bad
14 OK
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: 08:19, Set: 16:23, Transit: 12:21. Moon - Rise: 10:51, Set: 19:45. Civil Dark: 17:01 - 07:41. Nautical Dark: 17:43 - 06:59. Astro Dark: 18:22 - 06:20

Total Clouds (% Sky Obscured)

31
41
42
39
35
48
38
69
64
48
54
68
79
76
70
80
78
76
77
80
84
84
87
87

Low Clouds (% Sky Obscured)

31
40
27
13
0
19
38
58
60
48
54
68
76
76
70
78
74
73
72
70
71
70
71
73

Medium Clouds (% Sky Obscured)

0
0
0
0
0
8
12
15
14
16
15
8
4
0
0
0
0
1
5
29
8
73
76
68

High Clouds (% Sky Obscured)

8
6
10
4
2
3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
50
35
25

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
6
9
9
9
9

Fog (%)

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

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
1
2
16
2
2
3
2
2
1
0
4
6
12
15
19
17
20
30
31
13
15
8
15

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)

7
8
8
9
8
9
11
12
14
15
15
16
16
17
17
19
20
21
22
22
21
22
21
20

Chance of Frost

Temperature (°C)

10
11
11
11
11
11
11
10
10
10
10
9
9
9
8
8
8
8
8
8
7
7
7
7

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

90
88
87
80
85
86
88
88
83
81
84
85
84
80
81
82
81
81
84
90
85
79
84
81

Pressure (mb)

1016
1017
1017
1017
1018
1018
1019
1019
1020
1020
1021
1021
1021
1022
1022
1022
1022
1022
1022
1022
1022
1023
1023
1024

Ozone (du)

342
346
348
348
347
346
347
348
348
353
353
351
351
350
349
347
344
343
340
340
339
337
334
335

Wednesday 24

Waxing Crescent 19%

11:09

21:02

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

Sun - Rise: 08:20, Set: 16:23, Transit: 12:21. Moon - Rise: 11:09, Set: 21:02. Civil Dark: 17:02 - 07:41. Nautical Dark: 17:43 - 06:59. Astro Dark: 18:23 - 06:20

Total Clouds (% Sky Obscured)

86
86
85
83
79
66
49
30
29
6
7
8
8
11
19
28
34
39
45
43
38
40
39
36

Low Clouds (% Sky Obscured)

74
75
74
72
71
52
34
20
19
3
3
5
5
8
19
28
34
39
36
29
37
40
39
36

Medium Clouds (% Sky Obscured)

55
45
7
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2
7
17
30
38
39
36

High Clouds (% Sky Obscured)

25
25
4
1
0
0
1
1
1
1
2
1
2
4
4
3
1
1
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 (%)

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

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 (%)

6
8
7
6
4
11
4
1
0
0
0
1
1
1
3
3
2
9
15
18
22
23
19
26

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)

20
20
20
20
20
20
21
22
22
22
22
22
23
23
24
23
23
23
23
22
22
22
21
19

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

81
79
77
75
75
74
72
75
75
78
76
76
76
76
76
73
73
72
73
72
72
73
74
74

Pressure (mb)

1025
1025
1025
1025
1025
1025
1025
1026
1026
1027
1027
1027
1027
1027
1027
1027
1027
1027
1026
1026
1026
1026
1026
1026

Ozone (du)

336
333
331
328
324
322
321
322
322
323
324
327
328
329
328
330
333
336
336
337
338
339
341
342

Thursday 25

Waxing Crescent 28%

11:24

22:18

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: 08:20, Set: 16:24, Transit: 12:22. Moon - Rise: 11:24, Set: 22:18. Civil Dark: 17:02 - 07:41. Nautical Dark: 17:44 - 07:00. Astro Dark: 18:24 - 06:20

Total Clouds (% Sky Obscured)

38
44
41
47
52
68
69
63
76
81
85
86
87
88
88
88
88
88
88
88
85
83
80
81

Low Clouds (% Sky Obscured)

38
31
34
47
52
58
50
44
48
49
51
54
57
63
61
58
57
61
66
71
62
53
45
44

Medium Clouds (% Sky Obscured)

38
37
36
31
26
18
17
17
17
17
24
47
67
87
75
64
53
41
25
16
15
11
17
21

High 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

ISS Passover

Visibility (miles)

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

Fog (%)

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

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 (%)

25
18
19
16
11
14
15
12
20
22
23
30
36
42
42
46
52
49
39
21
22
22
13
22

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

19
18
18
17
17
17
18
18
18
19
19
19
19
19
19
19
19
19
19
19
19
18
18
18

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

70
67
64
64
67
67
67
68
69
69
69
71
75
79
83
82
80
79
80
82
80
82
82
83

Pressure (mb)

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

Ozone (du)

342
343
343
344
346
347
349
350
351
358
365
371
373
374
376
372
369
366
364
362
360
359
358
357

Friday 26

Waxing Crescent 39%

11:37

23:35

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

Sun - Rise: 08:20, Set: 16:25, Transit: 12:22. Moon - Rise: 11:37, Set: 23:35. Civil Dark: 17:03 - 07:42. Nautical Dark: 17:45 - 07:00. Astro Dark: 18:24 - 06:21

Total Clouds (% Sky Obscured)

82
80
75
70
60
65
76
90
90
93
93
90
88
80
81
69
60
60
66
74

Low Clouds (% Sky Obscured)

39
30
33
35
43
52
62
70
64
62
54
43
28
5
7
14
22
39
56
73

Medium Clouds (% Sky Obscured)

25
26
27
27
30
49
49
58
47
37
25
17
8
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

0
0
0
0
1
4
6
12
11
6
1
1
1
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

Fog (%)

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

Precipitation Type

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

Precipitation Probability (%)

21
11
16
15
9
18
18
15
24
26
23
24
23
17
20
18
8
12
12
8

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

18
18
18
18
18
18
18
18
18
18
18
18
17
17
17
17
16
16
17
17

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

80
79
76
76
76
76
76
78
79
79
80
80
80
82
82
80
79
80
80
78

Pressure (mb)

1027
1027
1027
1027
1027
1027
1028
1028
1029
1029
1029
1030
1030
1030
1030
1031
1031
1031
1031
1031

Ozone (du)

355
354
353
352
352
351
352
353
354
355
356
358
360
361
363
364
365
366
368
369

Forecast for Marazion, Cornwall, United Kingdom (50.13,-5.46)

Generated: 20/12/25 10:08:05. Forecast: 20/12/25 to 26/12/25. Timezone: UTC+0.00