Clear Outside v1.0 - International Weather Forecasts For Astronomers

Thursday 18

Waning Crescent 1%

08:17

15:04

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

Sun - Rise: 08:12, Set: 16:10, Transit: 12:11. Moon - Rise: 08:17, Set: 15:04. Civil Dark: 16:49 - 07:33. Nautical Dark: 17:32 - 06:51. Astro Dark: 18:12 - 06:10

Total Clouds (% Sky Obscured)

100
100
87
100
100
100
100
100
76
0
7
23
29
31
35
40
22
26
18
20
30
30
39
39

Low Clouds (% Sky Obscured)

50
35
25
7
0
0
0
0
0
0
7
23
29
31
35
40
22
26
18
20
30
30
39
39

Medium Clouds (% Sky Obscured)

100
76
87
75
97
45
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

100
87
86
100
100
100
100
100
16
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 (%)

0
0
3
0
0
0
0
2
2
4
3
4
5
5
4
4
4
4
4
2
5
3
2
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

84
85
87
85
84
79
77
79
81
84
85
85
85
87
82
80
80
78
80
81
88
91
90
91

Pressure (mb)

1002
1003
1005
1006
1008
1009
1010
1010
1011
1012
1013
1013
1014
1015
1016
1017
1017
1017
1017
1017
1017
1018
1018
1018

Ozone (du)

360
365
367
369
368
369
366
364
370
377
382
379
380
372
367
359
350
333
311
302
294
291
288
289

Friday 19

Waning Crescent 0%

09:10

15:59

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
17 Bad
18 Bad
19 Bad

Sun - Rise: 08:13, Set: 16:10, Transit: 12:12. Moon - Rise: 09:10, Set: 15:59. Civil Dark: 16:50 - 07:33. Nautical Dark: 17:32 - 06:51. Astro Dark: 18:12 - 06:11

Total Clouds (% Sky Obscured)

41
47
51
45
44
40
49
42
53
47
36
77
74
68
71
68
60
68
62
57
43
83
100
100

Low Clouds (% Sky Obscured)

41
47
51
45
44
40
49
42
53
47
36
65
50
51
58
58
47
52
47
31
25
51
66
61

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
1
30
35
30
30
39
55
35
60
67
66

High Clouds (% Sky Obscured)

1
1
1
0
0
2
1
0
2
2
2
31
30
30
30
25
25
25
40
35
40
56
98
100

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
7
7
6
4
4
2

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
Very Light Rain
Very Light Rain
Light Rain
Light Rain
Light Rain
Moderate Rain

Precipitation Probability (%)

4
4
3
3
5
8
10
10
7
14
3
4
4
11
3
5
29
48
64
73
86
95
95
95

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.2
0.3
0.4
0.6
1.2
2.9

Wind Speed/Direction (mph)

5
5
4
4
4
4
5
6
7
9
9
11
13
14
16
17
18
18
17
17
15
16
15
17

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

90
91
91
91
91
91
91
90
88
87
85
81
77
78
77
76
76
80
82
88
90
93
93
95

Pressure (mb)

1018
1017
1017
1016
1016
1015
1014
1014
1013
1012
1011
1011
1010
1010
1009
1009
1008
1007
1006
1005
1005
1005
1004
1004

Ozone (du)

287
289
290
290
284
285
285
286
286
290
294
301
304
306
309
316
315
312
307
308
308
310
315
320

Saturday 20

New Moon 2%

09:52

17:05

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
17 Bad
18 Bad
19 Bad

Sun - Rise: 08:13, Set: 16:11, Transit: 12:12. Moon - Rise: 09:52, Set: 17:05. Civil Dark: 16:50 - 07:34. Nautical Dark: 17:32 - 06:52. Astro Dark: 18:13 - 06:12

Total Clouds (% Sky Obscured)

100
100
100
97
100
100
96
88
100
99
100
98
100
97
99
100
98
100
100
86
78
84
100
100

Low Clouds (% Sky Obscured)

48
57
68
86
81
68
64
62
64
93
100
93
83
82
64
67
57
47
44
45
58
83
96
93

Medium Clouds (% Sky Obscured)

100
100
100
87
100
100
74
73
100
79
83
90
77
84
96
72
61
91
100
64
64
63
64
64

High Clouds (% Sky Obscured)

91
100
84
20
100
100
29
28
36
93
24
82
95
83
84
100
92
85
81
67
55
39
51
63

ISS Passover

Visibility (miles)

1
5
9
9
9
9
9
9
9
9
9
5
3
2
4
9
9
9
9
8
8
9
8
8

Fog (%)

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

Precipitation Type

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

Precipitation Probability (%)

95
65
33
32
14
21
16
11
20
54
90
95
95
95
79
42
16
29
33
38
38
31
45
43

Precipitation Amount (mm)

1.8
0
0
0
0
0
0
0
0
0
0.3
0.6
1.2
0.7
0.4
0
0
0
0
0
0
0
0.2
0

Wind Speed/Direction (mph)

13
9
7
5
6
6
5
5
6
6
6
7
8
12
13
13
14
12
13
14
15
15
17
18

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

96
88
88
90
93
93
91
93
91
93
95
95
96
96
90
81
80
74
74
74
75
78
82
82

Pressure (mb)

1003
1003
1003
1003
1003
1003
1003
1002
1002
1002
1002
1002
1001
1002
1002
1002
1002
1002
1002
1002
1001
1001
1001
1002

Ozone (du)

332
353
330
326
326
334
349
365
385
396
401
408
412
412
413
418
425
429
435
438
437
436
437
440

Sunday 21

Waxing Crescent 6%

10:22

18:18

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
17 Bad
18 Bad
19 Bad

Sun - Rise: 08:14, Set: 16:12, Transit: 12:13. Moon - Rise: 10:22, Set: 18:18. Civil Dark: 16:51 - 07:34. Nautical Dark: 17:33 - 06:52. Astro Dark: 18:13 - 06:12

Total Clouds (% Sky Obscured)

100
86
81
99
94
100
55
63
69
93
65
64
97
98
96
94
72
86
100
96
100
100
96
93

Low Clouds (% Sky Obscured)

90
84
81
93
80
74
49
58
69
75
65
58
52
58
50
50
50
54
54
64
73
76
64
65

Medium Clouds (% Sky Obscured)

96
57
53
51
48
41
39
37
31
33
40
38
88
84
37
34
27
36
49
34
46
40
49
58

High Clouds (% Sky Obscured)

70
70
70
72
87
86
55
56
46
47
34
33
70
80
88
94
67
60
59
62
66
75
64
22

ISS Passover

Visibility (miles)

8
4
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
8
9
9
9
9
8
7

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

Precipitation Probability (%)

53
59
55
66
53
35
15
18
16
5
5
9
13
16
18
22
30
28
20
20
36
29
42
34

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

17
16
14
14
13
13
11
10
9
9
8
8
8
8
7
7
8
8
8
8
8
7
7
7

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

6
5
5
6
6
6
5
5
5
5
5
5
5
5
6
6
6
6
6
6
6
5
5
5

Relative Humidity (%)

84
78
79
82
85
87
82
84
87
85
87
85
85
85
84
81
77
78
78
84
85
87
87
90

Pressure (mb)

1002
1002
1002
1003
1003
1004
1004
1004
1004
1005
1005
1006
1006
1007
1007
1008
1008
1008
1008
1008
1009
1009
1010
1010

Ozone (du)

440
438
432
429
428
428
430
432
432
432
432
431
430
430
431
433
437
438
438
437
432
427
422
416

Monday 22

Waxing Crescent 12%

10:45

19:35

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
17 Bad
18 Bad
19 Bad

Sun - Rise: 08:14, Set: 16:12, Transit: 12:13. Moon - Rise: 10:45, Set: 19:35. Civil Dark: 16:51 - 07:35. Nautical Dark: 17:34 - 06:52. Astro Dark: 18:14 - 06:12

Total Clouds (% Sky Obscured)

88
89
89
89
92
95
98
99
99
100
95
97
100
100
100
100
100
100
100
100
100
100
100
99

Low Clouds (% Sky Obscured)

71
72
72
73
80
84
91
89
87
84
64
79
95
94
88
88
89
86
76
80
81
85
83
81

Medium Clouds (% Sky Obscured)

65
35
16
40
50
36
35
60
83
100
95
91
86
79
76
72
79
89
100
97
94
92
92
90

High Clouds (% Sky Obscured)

5
28
27
26
49
70
94
96
98
100
85
86
86
86
93
100
98
97
96
88
80
69
46
27

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
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 (%)

16
4
2
0
1
0
1
1
10
8
9
6
0
4
5
6
9
11
13
13
12
9
12
12

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
10
11
13
13
14
14
14
11
11
11
12
13
14
13
13
14
14
14
14
15

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

90
87
84
82
81
82
81
82
84
84
82
79
78
78
78
78
78
78
79
79
84
88
93
93

Pressure (mb)

1010
1011
1011
1011
1011
1011
1011
1011
1011
1012
1012
1012
1012
1013
1013
1013
1013
1014
1014
1014
1015
1015
1016
1016

Ozone (du)

411
407
402
398
397
394
393
392
390
386
385
382
379
377
378
380
382
384
386
388
388
387
387
388

Tuesday 23

Waxing Crescent 19%

11:03

No Set

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
17 Bad
18 Bad
19 Bad

Sun - Rise: 08:14, Set: 16:13, Transit: 12:14. Moon - Rise: 11:03, Set: No Set. Civil Dark: 16:52 - 07:35. Nautical Dark: 17:34 - 06:53. Astro Dark: 18:14 - 06:13

Total Clouds (% Sky Obscured)

99
99
100
100
96
92
88
84
81
78
84
91
100
95
90
86
85
85
83
75
72
69
74
83

Low Clouds (% Sky Obscured)

80
75
72
69
61
49
43
54
64
71
69
66
62
63
70
77
78
77
76
73
72
69
69
69

Medium Clouds (% Sky Obscured)

89
71
53
25
21
16
12
18
24
44
49
43
29
22
14
6
5
5
4
3
2
0
7
13

High Clouds (% Sky Obscured)

5
37
68
100
67
33
0
0
5
5
42
71
96
76
55
34
23
12
1
1
1
1
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 (%)

10
11
8
4
7
7
4
7
6
3
12
14
15
15
15
14
16
18
20
20
16
7
9
8

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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

91
91
91
89
89
91
94
96
94
91
89
89
88
90
86
85
84
84
83
83
79
75
69
72

Pressure (mb)

1017
1018
1018
1018
1018
1019
1019
1020
1020
1020
1021
1021
1022
1022
1022
1022
1022
1022
1022
1022
1023
1023
1023
1023

Ozone (du)

389
390
389
388
386
386
385
384
383
383
382
382
381
380
385
389
393
388
384
380
379
378
377
373

Wednesday 24

Waxing Crescent 28%

11:17

20:52

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: 08:15, Set: 16:13, Transit: 12:14. Moon - Rise: 11:17, Set: 20:52. Civil Dark: 16:53 - 07:35. Nautical Dark: 17:35 - 06:53. Astro Dark: 18:15 - 06:13

Total Clouds (% Sky Obscured)

91
89
84
82
79
63
61
52
48
41
43
33
35
28
27
25

Low Clouds (% Sky Obscured)

70
66
62
58
58
57
52
52
48
41
43
33
35
28
27
25

Medium Clouds (% Sky Obscured)

24
43
47
50
45
41
36
27
25
21
15
8
0
20
27
25

High Clouds (% Sky Obscured)

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

ISS Passover

Visibility (miles)

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

Precipitation Type

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

Precipitation Probability (%)

5
19
25
29
30
33
36
34
30
20
23
23
21
27
26
20

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

18
17
17
17
18
17
17
17
17
17
18
18
18
18
18
18

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-4
-4
-4
-4
-5
-4
-4
-4
-5
-5
-5
-5
-5
-5
-5
-4

Dew Point (°C)

-2
-2
-2
-2
-2
-2
-2
-2
-2
-2
-2
-3
-2
-3
-3
-2

Relative Humidity (%)

74
77
76
77
76
77
77
78
78
78
78
77
78
77
74
72

Pressure (mb)

1023
1023
1022
1022
1021
1021
1021
1020
1020
1020
1020
1020
1020
1021
1021
1020

Ozone (du)

370
367
365
362
360
358
357
356
354
352
351
349
347
346
345
344

Welcome to Clear Outside

Forecast for Alphington, Devon, United Kingdom (50.70,-3.52)

Generated: 18/12/25 19:48:51. Forecast: 18/12/25 to 24/12/25. Timezone: UTC+0.00