Clear Outside v1.0 - International Weather Forecasts For Astronomers

Friday 19

Waning Crescent 0%

09:13

15:09

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
13 Bad
14 Bad

Sun - Rise: 08:15, Set: 16:14, Transit: 12:15. Moon - Rise: 09:13, Set: 15:09. Civil Dark: 16:53 - 07:36. Nautical Dark: 17:36 - 06:54. Astro Dark: 18:15 - 06:14

Total Clouds (% Sky Obscured)

67
67
66
43
44
54
57
54
64
75
69
80
54
77
75
87
82
61
94
100
100
100
100
89

Low Clouds (% Sky Obscured)

55
59
46
43
44
54
57
54
64
75
69
56
54
77
63
69
71
61
68
59
56
76
92
83

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
36
0
0
11
29
17
0
41
0
79
87
80
84

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
42
92
100
99
4

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
8
5
9
9
9
9
9
9
8
3

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

Precipitation Probability (%)

4
8
7
4
5
5
7
9
10
12
22
9
12
27
43
43
19
8
7
14
6
29
74
95

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.2
0.2
0
0
0
0
0
0
0.4
0.8

Wind Speed/Direction (mph)

12
9
8
6
6
6
6
6
7
8
9
11
13
15
16
17
19
20
21
22
23
23
24
24

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

85
91
91
93
91
91
90
90
90
91
91
88
87
82
84
88
82
81
79
77
74
77
82
88

Pressure (mb)

1017
1017
1017
1017
1017
1017
1016
1016
1015
1014
1013
1013
1011
1010
1009
1009
1008
1007
1006
1006
1005
1003
1002
1001

Ozone (du)

290
285
281
281
282
283
290
292
286
285
282
282
279
281
282
285
291
293
295
298
300
303
305
311

Saturday 20

New Moon 2%

09:54

16:04

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
13 Bad
14 Bad

Sun - Rise: 08:16, Set: 16:15, Transit: 12:16. Moon - Rise: 09:54, Set: 16:04. Civil Dark: 16:54 - 07:37. Nautical Dark: 17:36 - 06:55. Astro Dark: 18:16 - 06:15

Total Clouds (% Sky Obscured)

97
100
100
100
100
100
100
66
60
66
72
96
100
100
100
100
100
100
100
100
100
100
97
94

Low Clouds (% Sky Obscured)

81
100
100
100
100
61
84
57
58
65
63
70
76
89
100
96
100
64
43
49
57
41
42
42

Medium Clouds (% Sky Obscured)

94
100
100
94
97
100
99
17
0
0
22
71
67
85
99
100
100
100
100
100
100
90
92
85

High Clouds (% Sky Obscured)

15
43
3
85
42
34
85
40
40
19
2
3
27
85
100
100
100
90
62
63
100
100
54
55

ISS Passover

Visibility (miles)

3
2
8
6
3
9
9
9
9
9
9
8
9
8
5
6
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

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

Precipitation Probability (%)

95
95
95
95
95
62
20
4
15
8
30
37
39
67
94
81
58
41
22
15
11
14
31
48

Precipitation Amount (mm)

2.4
1.2
2
3.1
0.6
0.3
0
0
0
0
0
0
0
0.3
0.8
0.5
0
0
0
0
0
0
0
0.2

Wind Speed/Direction (mph)

24
16
16
13
14
10
14
13
12
12
9
9
8
9
7
8
7
6
5
6
6
6
6
6

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

93
94
90
91
96
90
82
78
76
72
76
80
81
83
90
94
91
93
93
91
90
88
85
85

Pressure (mb)

999
999
999
998
998
999
999
999
1000
1000
1000
1000
1001
1001
1001
1001
1001
1001
1002
1002
1002
1001
1001
1001

Ozone (du)

317
321
321
319
320
322
319
327
334
330
335
354
378
403
409
413
419
421
418
418
418
421
420
419

Sunday 21

Waxing Crescent 6%

10:25

17:10

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
13 Bad
14 Bad

Sun - Rise: 08:16, Set: 16:15, Transit: 12:16. Moon - Rise: 10:25, Set: 17:10. Civil Dark: 16:54 - 07:37. Nautical Dark: 17:36 - 06:55. Astro Dark: 18:16 - 06:15

Total Clouds (% Sky Obscured)

69
94
90
87
100
100
100
100
100
100
100
100
99
98
94
92
94
88
79
76
87
85
98
98

Low Clouds (% Sky Obscured)

52
68
70
64
51
63
59
51
50
79
83
82
78
64
58
72
68
54
48
54
80
68
56
47

Medium Clouds (% Sky Obscured)

54
83
38
23
51
87
100
100
97
100
100
100
95
83
80
64
79
65
43
66
23
33
40
47

High Clouds (% Sky Obscured)

65
55
47
64
53
100
94
100
100
100
100
56
51
80
71
42
32
22
0
0
50
46
84
84

ISS Passover

Visibility (miles)

5
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
7
1
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
Light Rain
Very Light Rain
Very Light Rain
Light Rain
Very Light Rain
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

36
26
12
7
10
5
2
2
11
51
50
60
69
61
31
3
1
1
1
1
0
5
6
5

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

4
3
3
2
2
2
3
3
3
3
3
2
2
2
2
3
2
2
2
2
2
3
4
4

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

88
88
88
88
88
90
90
90
91
89
88
88
88
86
85
85
85
86
86
83
81
75
74
79

Pressure (mb)

1001
1002
1002
1002
1003
1003
1003
1003
1003
1003
1003
1004
1003
1003
1003
1004
1003
1004
1005
1005
1005
1005
1005
1005

Ozone (du)

415
414
416
419
421
424
427
429
430
430
434
434
434
431
430
426
422
419
415
410
405
398
395
388

Monday 22

Waxing Crescent 5%

10:48

18:23

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
13 Bad
14 Bad

Sun - Rise: 08:17, Set: 16:16, Transit: 12:17. Moon - Rise: 10:48, Set: 18:23. Civil Dark: 16:55 - 07:38. Nautical Dark: 17:37 - 06:56. Astro Dark: 18:17 - 06:16

Total Clouds (% Sky Obscured)

92
80
82
100
94
87
96
98
87
88
95
100
100
99
99
99
100
100
97
100
100
100
99
99

Low Clouds (% Sky Obscured)

57
70
82
89
91
87
88
83
76
65
54
46
44
54
53
66
79
89
81
88
100
99
98
97

Medium Clouds (% Sky Obscured)

49
52
55
55
54
54
53
56
50
56
71
98
97
97
97
99
96
100
73
86
19
71
61
61

High Clouds (% Sky Obscured)

61
45
55
83
67
52
23
15
0
30
72
100
90
83
45
13
11
8
10
23
7
9
52
37

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
2
2
2
3
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
Very Light Rain
Very Light Rain
Very Light Rain
None
None
None
None
Light Rain
Light Rain
Light Rain
Very Light Rain
None
None
None
None
None
None
None

Precipitation Probability (%)

10
12
13
34
47
59
61
59
67
56
44
9
36
83
83
74
57
30
18
10
14
16
20
16

Precipitation Amount (mm)

0
0
0
0
0
0
0.2
0.2
0.3
0
0
0
0
0.8
0.9
0.6
0.3
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

4
4
4
3
4
5
5
8
8
8
9
11
12
13
14
15
16
15
15
15
15
16
15
14

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

81
81
80
80
80
82
86
84
82
85
85
84
84
84
91
94
94
94
91
90
93
91
93
93

Pressure (mb)

1005
1005
1005
1006
1006
1006
1006
1006
1006
1006
1006
1006
1006
1006
1006
1006
1006
1006
1007
1008
1008
1009
1009
1009

Ozone (du)

380
366
348
336
330
330
328
327
327
327
327
328
331
337
341
348
353
356
358
361
365
366
367
368

Tuesday 23

Waxing Crescent 12%

11:06

19:39

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
13 Bad
14 Bad

Sun - Rise: 08:17, Set: 16:16, Transit: 12:17. Moon - Rise: 11:06, Set: 19:39. Civil Dark: 16:55 - 07:38. Nautical Dark: 17:38 - 06:56. Astro Dark: 18:17 - 06:16

Total Clouds (% Sky Obscured)

99
98
83
86
84
72
88
89
90
86
82
76
73
75
70
76
63
50
64
78
89
86
84
80

Low Clouds (% Sky Obscured)

98
88
83
86
81
68
62
68
71
72
77
68
61
62
61
61
45
43
59
74
89
83
77
68

Medium Clouds (% Sky Obscured)

37
53
18
2
4
4
35
30
35
30
25
35
39
24
18
25
23
16
12
8
5
3
1
0

High Clouds (% Sky Obscured)

19
8
0
0
0
10
2
0
5
12
2
5
10
14
29
19
14
10
7
4
2
3
3
3

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
8
6
5
6
8
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 (%)

17
16
7
10
14
7
11
8
5
5
6
4
4
3
1
5
5
4
6
6
5
9
10
6

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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

90
88
91
93
93
91
91
91
89
88
89
86
88
91
91
93
93
93
94
91
88
85
85
85

Pressure (mb)

1010
1011
1012
1012
1013
1014
1014
1015
1015
1016
1017
1017
1018
1018
1019
1020
1020
1021
1022
1022
1022
1023
1023
1023

Ozone (du)

367
368
367
365
364
363
362
361
359
353
351
349
349
351
354
356
354
353
351
352
352
353
354
355

Wednesday 24

Waxing Crescent 19%

11:20

20:56

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
13 Bad
14 Bad

Sun - Rise: 08:17, Set: 16:17, Transit: 12:18. Moon - Rise: 11:20, Set: 20:56. Civil Dark: 16:56 - 07:38. Nautical Dark: 17:38 - 06:56. Astro Dark: 18:18 - 06:16

Total Clouds (% Sky Obscured)

80
78
76
77
79
82
75
76
82
83
79
75
75
68
61
59
54
54
52
51
49
62
74
87

Low Clouds (% Sky Obscured)

68
64
63
68
74
80
74
67
81
83
77
70
67
64
61
59
54
54
52
49
42
49
55
61

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
1
3
5
11
16
21
13
6
0
0
0
0
0
1
1
9
16
20

High Clouds (% Sky Obscured)

2
1
1
1
1
2
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
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
11
6
9
9
7
12
12
11
13
12
8
9
8
4
7
7
4
8
9
5
10
11
9

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)

16
16
16
16
15
15
14
14
13
12
10
8
7
7
7
7
7
7
7
7
8
9
9
9

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

85
83
83
82
83
83
86
86
88
89
89
91
91
89
87
86
84
83
81
75
70
65
66
66

Pressure (mb)

1023
1023
1024
1024
1024
1025
1025
1025
1024
1024
1024
1024
1024
1024
1024
1023
1024
1024
1024
1024
1024
1023
1023
1023

Ozone (du)

357
357
357
357
356
355
354
353
353
353
352
350
349
346
344
341
340
340
339
337
336
335
334
333

Thursday 25

Waxing Crescent 28%

11:33

22:13

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 OK
04 OK
05 OK
06 OK
07 OK
08 OK
09 OK
10 OK
11 OK

Sun - Rise: 08:18, Set: 16:18, Transit: 12:18. Moon - Rise: 11:33, Set: 22:13. Civil Dark: 16:57 - 07:39. Nautical Dark: 17:39 - 06:57. Astro Dark: 18:19 - 06:17

Total Clouds (% Sky Obscured)

91
96
85
78
75
72
69
66
54
45
41
42
24
11
11
11
6
10
9
12
25

Low Clouds (% Sky Obscured)

59
60
61
68
75
72
69
66
54
45
41
42
24
11
11
11
6
10
9
12
25

Medium Clouds (% Sky Obscured)

23
31
30
32
33
30
30
22
26
33
34
30
24
11
11
11
6
10
9
12
25

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

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

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 (%)

20
21
12
25
26
22
28
28
22
22
22
21
19
18
17
18
16
10
14
12
4

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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

68
71
74
78
80
83
83
84
86
86
86
86
84
84
83
82
79
78
77
70
65

Pressure (mb)

1023
1023
1023
1023
1023
1023
1023
1023
1023
1023
1023
1023
1023
1023
1023
1023
1023
1023
1024
1024
1024

Ozone (du)

332
329
325
322
321
320
319
319
319
318
317
316
315
316
317
317
317
318
318
318
318

Forecast for Upton, Cornwall, United Kingdom (50.54,-4.42)

Generated: 19/12/25 15:29:03. Forecast: 19/12/25 to 25/12/25. Timezone: UTC+0.00