Clear Outside v1.0 - International Weather Forecasts For Astronomers

Thursday 18

Waning Crescent 1%

08:20

15:12

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

Sun - Rise: 08:15, Set: 16:17, Transit: 12:16. Moon - Rise: 08:20, Set: 15:12. Civil Dark: 16:55 - 07:36. Nautical Dark: 17:37 - 06:55. Astro Dark: 18:17 - 06:15

Total Clouds (% Sky Obscured)

91
93
95
96
100
100
100
17
5
32
31
26
29
25
23
36
39
27
32
40
20
31
33
24

Low Clouds (% Sky Obscured)

48
59
37
15
22
0
6
13
0
28
31
26
29
25
23
36
39
27
32
40
20
31
33
24

Medium Clouds (% Sky Obscured)

91
93
47
29
7
0
11
13
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

91
93
95
96
100
100
100
17
5
32
18
0
0
0
0
0
0
0
0
0
0
0
0
0

ISS Passover

Visibility (miles)

8
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

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

Precipitation Probability (%)

58
46
18
8
6
1
1
3
4
5
7
8
12
11
13
13
22
13
20
20
21
9
3
5

Precipitation Amount (mm)

0.2
0.3
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
17
13
15
15
14
14
13
14
14
15
15
14
13
13
12
12
13
14
14
13
11
8

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

91
91
87
87
81
78
75
73
74
77
78
79
81
79
81
81
82
80
80
78
78
80
81
85

Pressure (mb)

999
1000
1001
1003
1005
1006
1008
1009
1010
1011
1011
1012
1013
1013
1014
1015
1016
1017
1017
1017
1017
1017
1017
1018

Ozone (du)

334
342
361
370
370
368
374
377
377
374
378
387
390
384
383
373
366
359
345
332
326
306
298
291

Friday 19

Waning Crescent 0%

09:13

16:06

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
13 Bad
14 Bad
15 Bad
16 Bad

Sun - Rise: 08:16, Set: 16:17, Transit: 12:16. Moon - Rise: 09:13, Set: 16:06. Civil Dark: 16:56 - 07:37. Nautical Dark: 17:37 - 06:55. Astro Dark: 18:17 - 06:15

Total Clouds (% Sky Obscured)

15
32
39
67
54
69
63
68
73
77
75
74
80
83
80
58
48
76
66
92
99
100
100
100

Low Clouds (% Sky Obscured)

15
32
39
49
54
54
44
68
59
57
50
59
65
66
58
58
48
46
49
53
44
40
67
56

Medium Clouds (% Sky Obscured)

0
0
0
29
0
28
27
0
26
34
33
28
30
34
69
30
25
63
46
48
85
100
100
96

High Clouds (% Sky Obscured)

0
0
0
1
1
2
2
24
10
6
34
45
40
40
45
50
48
65
60
90
97
98
99
93

ISS Passover

Visibility (miles)

9
9
9
9
9
8
9
9
9
9
9
9
8
9
9
9
9
9
5
6
3
4
7
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
Very Light Rain
None
None
None
None
None
None
Very Light Rain
Light Rain
Light Rain
Light Rain
None
Very Light Rain

Precipitation Probability (%)

5
6
10
21
32
27
23
24
29
33
36
38
33
35
31
25
16
49
69
91
85
80
63
72

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0.2
0
0
0
0
0
0
0.3
0.6
0.5
0.4
0
0.3

Wind Speed/Direction (mph)

7
7
7
8
8
9
11
11
13
14
14
15
17
17
17
18
20
20
22
22
22
21
17
13

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

88
90
90
90
90
90
87
85
85
85
82
79
79
77
74
73
73
74
77
85
90
91
90
87

Pressure (mb)

1018
1018
1018
1017
1017
1016
1016
1015
1014
1013
1012
1011
1010
1010
1009
1008
1008
1007
1007
1005
1004
1004
1003
1003

Ozone (du)

291
290
290
290
291
288
282
285
285
287
291
294
298
301
304
308
315
318
317
313
312
314
318
323

Saturday 20

New Moon 2%

09:55

No Set

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
15 Bad
16 Bad

Sun - Rise: 08:16, Set: 16:17, Transit: 12:17. Moon - Rise: 09:55, Set: No Set. Civil Dark: 16:56 - 07:38. Nautical Dark: 17:38 - 06:56. Astro Dark: 18:17 - 06:16

Total Clouds (% Sky Obscured)

100
87
91
100
99
98
97
93
99
100
100
100
95
99
88
88
85
93
94
93
89
90
90
90

Low Clouds (% Sky Obscured)

70
63
72
87
83
59
49
51
95
92
75
73
62
74
61
72
71
83
72
62
54
49
50
51

Medium Clouds (% Sky Obscured)

90
76
84
96
83
66
80
62
87
100
100
90
89
97
84
81
81
82
80
83
30
65
48
43

High Clouds (% Sky Obscured)

100
55
50
100
96
96
93
77
94
100
100
100
75
73
67
54
42
60
78
21
21
14
10
4

ISS Passover

Visibility (miles)

3
7
8
9
9
8
9
9
9
9
9
9
9
9
7
3
2
6
9
9
9
7
5
5

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

Precipitation Probability (%)

88
62
38
36
41
40
24
23
46
61
50
38
34
46
95
95
95
95
45
33
48
61
69
71

Precipitation Amount (mm)

0.6
0
0
0
0.2
0.2
0
0
0.3
0.7
0.3
0
0
0
0.8
2
0.8
0.7
0
0
0
0.3
0.4
0.4

Wind Speed/Direction (mph)

12
12
11
11
10
9
8
6
6
7
6
5
6
6
6
6
8
8
10
8
10
12
14
15

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

6
6
6
6
6
6
7
7
6
6
6
6
6
6
5
5
5
5
5
6
5
4
4
1

Dew Point (°C)

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

Relative Humidity (%)

87
93
95
93
91
88
87
84
84
84
84
82
81
84
90
91
95
95
95
90
77
73
77
84

Pressure (mb)

1003
1003
1003
1002
1002
1002
1002
1001
1001
1001
1001
1001
1001
1001
1001
1000
1001
1000
1000
1000
1000
999
999
998

Ozone (du)

329
342
361
356
335
334
344
353
372
397
410
418
420
420
421
424
426
429
433
442
448
451
451
451

Sunday 21

Waxing Crescent 6%

10:26

17:12

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
15 Bad
16 Bad

Sun - Rise: 08:17, Set: 16:18, Transit: 12:17. Moon - Rise: 10:26, Set: 17:12. Civil Dark: 16:57 - 07:38. Nautical Dark: 17:38 - 06:56. Astro Dark: 18:18 - 06:16

Total Clouds (% Sky Obscured)

88
84
68
85
86
94
100
100
88
100
69
86
78
94
80
72
94
94
91
88
86
83
87
90

Low Clouds (% Sky Obscured)

54
61
68
82
85
91
95
81
77
83
66
76
75
74
68
56
51
45
41
42
42
44
39
35

Medium Clouds (% Sky Obscured)

43
52
48
73
69
48
86
90
67
43
24
35
49
78
37
41
87
89
91
88
83
80
75
75

High Clouds (% Sky Obscured)

2
4
5
6
13
25
71
99
39
35
35
27
20
45
23
25
42
14
7
11
71
70
74
80

ISS Passover

Visibility (miles)

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

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

Precipitation Probability (%)

65
57
47
35
29
37
29
28
34
30
34
36
27
22
21
18
29
31
34
36
35
33
30
21

Precipitation Amount (mm)

0.4
0.3
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)

15
15
15
17
18
16
15
14
13
13
13
12
12
11
10
9
9
8
8
9
10
9
9
8

Chance of Frost

Temperature (°C)

8
8
8
8
8
8
8
8
8
8
8
8
8
7
8
7
7
8
9
9
9
9
9
8

Feels Like (°C)

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

Dew Point (°C)

6
5
5
6
6
7
7
6
5
6
5
5
5
5
5
5
5
5
6
5
5
6
6
6

Relative Humidity (%)

84
81
81
87
85
90
88
82
81
82
81
84
85
85
85
85
85
84
80
76
74
78
81
85

Pressure (mb)

997
997
997
999
1000
1001
1002
1002
1002
1003
1003
1003
1003
1004
1004
1005
1005
1006
1006
1007
1007
1007
1007
1008

Ozone (du)

452
454
455
452
450
448
447
447
449
451
452
452
451
448
446
443
443
441
441
439
435
427
420
415

Monday 22

Waxing Crescent 12%

10:49

18:25

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 OK
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad

Sun - Rise: 08:17, Set: 16:19, Transit: 12:18. Moon - Rise: 10:49, Set: 18:25. Civil Dark: 16:57 - 07:38. Nautical Dark: 17:39 - 06:56. Astro Dark: 18:19 - 06:17

Total Clouds (% Sky Obscured)

94
93
91
89
88
89
89
90
90
90
94
97
100
22
35
47
60
80
91
91
91
91
92
93

Low Clouds (% Sky Obscured)

30
40
49
55
54
60
59
61
67
69
69
67
65
20
30
40
48
58
69
68
65
67
62
62

Medium Clouds (% Sky Obscured)

70
62
65
75
75
74
74
54
71
65
78
81
100
22
35
47
47
39
28
35
51
70
80
85

High Clouds (% Sky Obscured)

89
77
62
41
41
41
41
31
29
27
48
69
91
22
35
37
32
31
35
56
56
47
47
37

ISS Passover

Visibility (miles)

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

15
20
22
11
5
4
9
3
12
16
17
19
15
22
18
10
12
13
11
12
11
9
11
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)

7
7
8
8
9
9
9
9
11
12
13
13
13
14
13
13
13
15
17
18
17
17
17
17

Chance of Frost

Temperature (°C)

7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7
7

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

85
84
81
81
79
78
76
76
78
76
79
79
78
79
78
78
76
76
75
75
75
76
76
76

Pressure (mb)

1008
1008
1009
1009
1009
1009
1009
1009
1009
1009
1009
1009
1009
1009
1009
1010
1010
1011
1011
1011
1012
1012
1012
1013

Ozone (du)

409
402
399
395
392
388
383
378
374
370
366
361
356
354
357
359
362
365
368
372
375
378
381
382

Tuesday 23

Waxing Crescent 19%

11:07

19:41

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
15 Bad
16 Bad

Sun - Rise: 08:18, Set: 16:19, Transit: 12:18. Moon - Rise: 11:07, Set: 19:41. Civil Dark: 16:58 - 07:39. Nautical Dark: 17:39 - 06:57. Astro Dark: 18:19 - 06:17

Total Clouds (% Sky Obscured)

93
95
97
99
97
92
88
88
89
88
81
76
72
69
67
63
58
66
69
69
72
78
81
81

Low Clouds (% Sky Obscured)

59
66
72
78
74
74
75
74
73
71
68
65
62
62
62
62
58
66
69
69
72
73
70
63

Medium Clouds (% Sky Obscured)

86
89
95
95
77
61
45
40
39
39
38
52
56
53
40
28
20
13
5
4
4
4
3
3

High Clouds (% Sky Obscured)

37
31
26
20
22
19
12
9
6
0
0
0
2
5
7
12
9
11
6
4
2
1
1
1

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 (%)

9
13
14
12
17
20
18
17
15
8
12
11
5
10
10
6
14
17
18
21
22
22
22
22

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)

17
16
17
17
18
18
18
18
18
18
17
17
17
17
17
16
16
17
18
18
18
18
18
19

Chance of Frost

Temperature (°C)

6
6
6
5
5
5
5
5
5
4
4
4
4
4
4
4
4
5
5
5
5
5
5
5

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

76
78
79
82
85
85
85
86
86
86
86
86
88
88
88
88
89
88
85
83
83
83
83
82

Pressure (mb)

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

Ozone (du)

384
385
387
389
390
389
388
388
387
387
386
385
384
382
382
381
381
379
378
377
379
382
385
383

Wednesday 24

Waxing Crescent 28%

11:21

20:58

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 OK

Sun - Rise: 08:18, Set: 16:20, Transit: 12:19. Moon - Rise: 11:21, Set: 20:58. Civil Dark: 16:59 - 07:39. Nautical Dark: 17:40 - 06:57. Astro Dark: 18:20 - 06:17

Total Clouds (% Sky Obscured)

81
77
72
64
58
52
47
52
53
58
58
56
59
51
42
34
27
20
13

Low Clouds (% Sky Obscured)

57
56
55
57
50
43
36
40
44
49
55
56
59
51
42
34
27
20
13

Medium Clouds (% Sky Obscured)

3
2
1
0
17
30
47
50
49
44
43
42
50
43
41
34
27
16
0

High Clouds (% Sky Obscured)

1
1
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

Fog (%)

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
Very Light Rain
None
None
None

Precipitation Probability (%)

19
18
14
6
11
13
11
19
22
21
23
23
20
36
43
47
42
35
24

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

19
19
19
18
18
18
18
19
18
17
17
16
16
16
16
15
15
15
14

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

0
-0
-2
-3
-3
-3
-3
-3
-5
-5
-5
-5
-5
-5
-5
-5
-5
-4
-4

Dew Point (°C)

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

Relative Humidity (%)

80
79
76
73
69
72
74
77
77
77
77
77
78
78
78
78
77
76
72

Pressure (mb)

1022
1022
1022
1022
1022
1022
1021
1021
1021
1020
1020
1019
1019
1019
1019
1019
1019
1019
1019

Ozone (du)

381
379
376
374
372
370
368
366
363
361
359
358
356
354
353
351
349
349
349

Forecast for Saint Blazey, Cornwall, United Kingdom (50.36,-4.74)

Generated: 18/12/25 17:37:19. Forecast: 18/12/25 to 24/12/25. Timezone: UTC+0.00