Clear Outside v1.0 - International Weather Forecasts For Astronomers

Wednesday 17

Waning Crescent 3%

07:09

13:58

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

Sun - Rise: 08:05, Set: 15:48, Transit: 11:57. Moon - Rise: 07:09, Set: 13:58. Civil Dark: 16:29 - 07:24. Nautical Dark: 17:13 - 06:40. Astro Dark: 17:54 - 05:59

Total Clouds (% Sky Obscured)

39
53
63
97
95
95
100
95
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

39
53
63
85
94
92
97
89
93
100
98
96
93
51
55
50
46
63
76
100
100
100
97
81

Medium Clouds (% Sky Obscured)

39
53
63
61
52
50
49
46
96
100
97
100
99
97
97
100
100
100
100
100
100
100
100
100

High Clouds (% Sky Obscured)

39
53
63
2
0
29
91
30
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100

ISS Passover

Visibility (miles)

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

Precipitation Probability (%)

0
0
0
7
1
4
29
95
95
50
27
17
8
4
1
3
9
59
95
95
95
95
95
95

Precipitation Amount (mm)

0
0
0
0
0
0
0
1
1.6
0
0
0
0
0
0
0
0
0.2
1.2
4.1
2.7
2.6
1.3
0.6

Wind Speed/Direction (mph)

14
16
17
20
21
22
23
23
22
22
21
20
17
14
11
11
10
10
10
11
12
13
16
18

Chance of Frost

Temperature (°C)

9
9
9
9
9
9
9
10
10
10
10
11
11
11
11
11
10
10
11
11
10
10
10
10

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

81
84
82
82
82
82
82
84
90
88
88
90
91
88
90
91
90
91
95
93
95
93
90
90

Pressure (mb)

1011
1010
1010
1009
1009
1008
1007
1007
1006
1006
1005
1005
1005
1006
1006
1006
1007
1007
1006
1005
1003
1002
1001
1000

Ozone (du)

294
295
294
297
296
293
291
295
300
305
303
308
308
304
302
300
296
297
293
294
293
294
290
286

Thursday 18

Waning Crescent 1%

08:14

14:38

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 Good
11 Good
12 OK
13 OK
14 Bad
15 OK

Sun - Rise: 08:06, Set: 15:49, Transit: 11:57. Moon - Rise: 08:14, Set: 14:38. Civil Dark: 16:29 - 07:25. Nautical Dark: 17:13 - 06:41. Astro Dark: 17:55 - 05:59

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
93
100
100
100
100
100
100
100
100
93
85
85
0
12
27
42
63
37

Low Clouds (% Sky Obscured)

90
54
31
47
51
67
64
62
31
0
0
21
14
0
0
0
0
0
0
12
27
42
63
37

Medium Clouds (% Sky Obscured)

99
97
74
72
26
54
81
100
64
100
100
100
100
70
65
65
40
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

100
100
100
100
100
94
80
100
100
100
100
100
100
100
100
84
70
70
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 (%)

56
34
3
0
0
14
15
19
1
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)

22
21
16
16
15
16
17
16
16
14
11
10
11
12
12
13
13
13
14
14
15
14
14
12

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

83
85
80
82
87
84
82
82
82
84
79
81
81
82
82
83
82
82
81
79
80
80
80
82

Pressure (mb)

999
1000
1001
1002
1003
1004
1004
1005
1007
1008
1009
1010
1010
1011
1012
1012
1013
1014
1015
1015
1015
1015
1015
1016

Ozone (du)

288
287
289
305
317
333
344
346
343
340
339
341
344
349
355
362
367
366
367
365
347
337
326
309

Friday 19

Waning Crescent 0%

09:08

15:33

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

Sun - Rise: 08:06, Set: 15:49, Transit: 11:58. Moon - Rise: 09:08, Set: 15:33. Civil Dark: 16:30 - 07:25. Nautical Dark: 17:14 - 06:41. Astro Dark: 17:55 - 06:00

Total Clouds (% Sky Obscured)

30
25
27
5
11
20
6
2
3
7
12
16
21
22
25
29
49
53
39
41
49
50
47
29

Low Clouds (% Sky Obscured)

30
25
27
4
11
20
6
0
0
7
12
16
21
22
25
29
49
53
39
41
49
50
46
29

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
7
0
1
1
1
1
1

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
2
2
2
1
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
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
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)

11
10
10
10
9
8
7
7
8
7
7
7
7
7
7
7
7
6
6
8
9
9
8
8

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

85
88
90
91
93
93
93
93
93
91
93
93
91
91
93
93
93
94
91
85
84
84
85
87

Pressure (mb)

1016
1017
1017
1017
1018
1018
1017
1017
1017
1017
1016
1016
1015
1015
1015
1015
1015
1014
1014
1014
1013
1012
1012
1011

Ozone (du)

306
302
297
295
292
290
288
287
288
292
294
292
295
298
298
298
297
296
297
299
302
304
303
300

Saturday 20

New Moon 2%

09:48

No Set

16 OK
17 Good
18 Good
19 Bad
20 OK
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

Sun - Rise: 08:07, Set: 15:49, Transit: 11:58. Moon - Rise: 09:48, Set: No Set. Civil Dark: 16:30 - 07:26. Nautical Dark: 17:14 - 06:42. Astro Dark: 17:56 - 06:00

Total Clouds (% Sky Obscured)

16
1
7
40
16
52
78
93
94
95
96
97
99
100
100
100
100
100
100
100
98
95
93
94

Low Clouds (% Sky Obscured)

16
1
3
6
8
17
27
37
54
71
85
89
95
100
100
100
100
100
100
100
97
95
93
92

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
35
10
45
43
45
51
52
52
59
65
71
77
81
87
77
57
15
6

High Clouds (% Sky Obscured)

0
0
4
31
10
37
60
78
76
77
77
68
61
55
51
53
50
58
68
73
59
48
32
51

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
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
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
0
0
0
0
0
0
0
0
0
0
0
0
2
2
3
23
29
19
15
13
3
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
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

93
94
93
93
94
94
94
96
96
93
93
94
94
94
94
94
96
96
96
96
98
98
98
100

Pressure (mb)

1011
1011
1011
1010
1010
1010
1010
1009
1009
1009
1009
1009
1009
1009
1009
1009
1009
1009
1009
1008
1008
1008
1008
1008

Ozone (du)

301
304
309
312
313
312
311
307
304
303
303
301
302
307
311
316
319
321
324
324
328
333
337
338

Sunday 21

Waxing Crescent 6%

10:17

16:40

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
15 Bad

Sun - Rise: 08:07, Set: 15:50, Transit: 11:59. Moon - Rise: 10:17, Set: 16:40. Civil Dark: 16:31 - 07:26. Nautical Dark: 17:15 - 06:42. Astro Dark: 17:56 - 06:01

Total Clouds (% Sky Obscured)

97
85
99
99
99
99
99
99
99
100
100
99
97
95
100
99
98
99
99
100
100
100
100
100

Low Clouds (% Sky Obscured)

91
67
70
73
79
87
86
90
92
94
95
94
88
83
93
93
93
94
96
98
99
99
99
97

Medium Clouds (% Sky Obscured)

10
17
30
49
72
67
94
82
73
83
78
84
86
86
95
90
85
73
61
50
47
42
40
46

High Clouds (% Sky Obscured)

65
81
70
51
35
36
42
52
46
44
46
45
47
49
90
83
74
66
68
73
82
91
100
100

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

Precipitation Probability (%)

2
0
5
6
4
31
45
56
50
45
43
35
26
9
62
63
61
44
30
20
15
12
10
9

Precipitation Amount (mm)

0
0
0
0
0
0
0
0.3
0.2
0
0
0
0
0
0.3
0.3
0.2
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

91
90
91
94
93
94
93
93
93
93
93
94
96
96
98
96
94
95
91
88
84
84
84
82

Pressure (mb)

1008
1009
1009
1009
1010
1010
1010
1010
1010
1010
1010
1010
1010
1010
1010
1007
1007
1007
1006
1006
1006
1007
1007
1007

Ozone (du)

338
341
349
356
357
356
359
363
365
368
373
376
378
380
381
384
387
390
394
397
400
402
404
406

Monday 22

Waxing Crescent 12%

10:38

17:55

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
15 Bad

Sun - Rise: 08:08, Set: 15:51, Transit: 11:59. Moon - Rise: 10:38, Set: 17:55. Civil Dark: 16:31 - 07:27. Nautical Dark: 17:15 - 06:43. Astro Dark: 17:57 - 06:01

Total Clouds (% Sky Obscured)

100
100
99
99
98
98
97
97
95
93
91
92
94
96
93
90
87
91
96
100
100
100
100
100

Low Clouds (% Sky Obscured)

93
89
86
83
85
87
84
80
76
72
64
65
69
65
50
62
72
82
88
94
96
99
100
100

Medium Clouds (% Sky Obscured)

43
34
35
42
55
64
71
78
76
70
52
46
36
35
49
73
73
73
69
75
65
55
45
55

High Clouds (% Sky Obscured)

100
100
82
65
47
36
28
20
18
20
21
21
24
27
26
22
21
20
23
30
32
48
55
60

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 (%)

7
3
4
2
1
2
1
0
1
2
2
1
0
0
0
0
0
0
0
0
6
8
5
16

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

84
84
85
87
88
88
88
88
86
88
88
88
86
88
86
86
86
86
85
83
80
83
83
86

Pressure (mb)

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

Ozone (du)

405
403
402
402
402
402
402
402
402
401
400
399
400
401
402
404
406
408
409
410
410
412
414
416

Tuesday 23

Waxing Crescent 19%

10:53

19:14

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

Sun - Rise: 08:08, Set: 15:51, Transit: 12:00. Moon - Rise: 10:53, Set: 19:14. Civil Dark: 16:32 - 07:27. Nautical Dark: 17:16 - 06:43. Astro Dark: 17:57 - 06:02

Total Clouds (% Sky Obscured)

100
100
100
100
100
97
95
93
94
95
93
90
92
94
97
98
99
99
100
100

Low Clouds (% Sky Obscured)

100
100
100
100
100
97
94
91
94
95
93
90
87
71
69
76
97
98
99
100

Medium Clouds (% Sky Obscured)

60
70
58
56
54
40
20
0
9
15
20
38
56
73
71
59
46
37
25
19

High Clouds (% Sky Obscured)

60
65
54
48
38
27
39
42
46
54
46
28
19
4
4
4
4
3
3
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

Fog (%)

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

Precipitation Probability (%)

21
23
21
16
5
10
10
7
12
11
5
14
17
18
18
21
26
27
29
33

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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

89
93
96
94
93
93
93
93
93
93
94
94
94
94
94
93
93
91
91
91

Pressure (mb)

1012
1012
1012
1013
1013
1013
1013
1013
1014
1014
1014
1014
1014
1015
1015
1015
1016
1016
1017
1017

Ozone (du)

417
419
420
419
418
417
416
415
415
415
416
417
418
419
420
420
419
418
417
415

Forecast for Bourn, Cambridgeshire, United Kingdom (52.20,-0.05)

Generated: 17/12/25 16:10:25. Forecast: 17/12/25 to 23/12/25. Timezone: UTC+0.00