Clear Outside v1.0 - International Weather Forecasts For Astronomers

Wednesday 17

Waning Crescent 7%

06:01

13:40

00 Bad
01 Good
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
20 Bad
21 Bad
22 Bad
23 Bad

Sun - Rise: 08:08, Set: 15:58, Transit: 12:03. Moon - Rise: 06:01, Set: 13:40. Civil Dark: 16:38 - 07:28. Nautical Dark: 17:21 - 06:45. Astro Dark: 18:02 - 06:04

Total Clouds (% Sky Obscured)

98
5
59
97
98
84
61
77
82
86
100
100
100
100
100
100
100
100
100
100
98
100
100
100

Low Clouds (% Sky Obscured)

45
53
43
38
31
13
12
23
24
35
46
48
71
80
90
98
100
100
100
100
93
100
100
100

Medium Clouds (% Sky Obscured)

0
0
33
63
73
63
82
63
82
86
100
100
100
100
90
81
63
74
91
89
95
94
85
97

High Clouds (% Sky Obscured)

4
4
10
69
75
23
100
77
82
86
100
100
100
100
100
98
60
50
35
3
1
98
100
100

ISS Passover

Visibility (miles)

-
-
-
-
-
-
-
9
9
9
9
9
7
9
9
6
7
6
4
9
9
3
3
3

Fog (%)

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

Precipitation Probability (%)

0
0
0
0
0
0
0
0
3
22
36
59
59
50
66
72
63
84
74
57
95
95
95
95

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0.3
0.2
0
0.4
0.5
0.3
0.7
0.4
0
0.7
1.4
1.1
0.7

Wind Speed/Direction (mph)

5
4
4
4
4
5
5
6
8
9
12
14
16
18
18
19
20
22
22
22
23
22
22
22

Chance of Frost

Temperature (°C)

2
2
1
1
0
0
1
3
4
5
6
6
7
8
8
8
9
9
9
9
10
10
10
10

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

98
97
100
100
100
100
100
91
91
86
83
85
87
88
88
91
91
93
95
93
93
95
93
93

Pressure (mb)

1017
1016
1016
1016
1016
1016
1016
1016
1016
1016
1015
1015
1014
1013
1012
1011
1011
1010
1009
1009
1008
1008
1007
1007

Ozone (du)

322
317
315
312
310
306
304
303
302
301
302
303
301
299
298
294
293
295
295
294
295
299
300
306

Thursday 18

Waning Crescent 3%

07:12

14:09

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
20 Bad
21 Bad
22 Bad
23 Bad

Sun - Rise: 08:09, Set: 15:58, Transit: 12:04. Moon - Rise: 07:12, Set: 14:09. Civil Dark: 16:39 - 07:29. Nautical Dark: 17:22 - 06:45. Astro Dark: 18:03 - 06:04

Total Clouds (% Sky Obscured)

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

Low Clouds (% Sky Obscured)

100
70
39
32
38
37
46
48
51
100
100
100
97
96
67
82
86
63
51
71
99
73
68
76

Medium Clouds (% Sky Obscured)

93
100
93
71
100
100
100
100
100
100
100
100
100
100
100
77
100
100
100
100
63
97
50
60

High Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
98
89
96
100
100
100
98
100
90

ISS Passover

Visibility (miles)

6
2
3
9
9
9
9
9
9
2
0
2
2
2
2
3
5
3
6
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
Very Light Rain
None
None
None
None
None
None
Light Rain
Moderate Rain
Moderate Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
None
Very Light Rain
Very Light Rain
None
None

Precipitation Probability (%)

91
95
53
4
1
0
2
11
60
95
95
95
95
95
95
95
95
95
69
39
53
57
30
3

Precipitation Amount (mm)

0.6
0.9
0.2
0
0
0
0
0
0
1.2
4
4.9
2
2.2
1.3
0.7
1.2
0.8
0.4
0
0.2
0.3
0
0

Wind Speed/Direction (mph)

21
18
15
11
9
8
7
7
8
6
6
9
10
12
13
14
15
12
9
12
14
13
14
13

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

95
95
96
95
95
96
95
95
96
96
98
96
95
91
91
88
88
95
95
90
90
91
88
82

Pressure (mb)

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

Ozone (du)

306
310
310
307
304
300
297
293
289
291
294
291
292
289
287
286
286
299
309
315
322
339
356
356

Friday 19

Waning Crescent 1%

08:16

14:50

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

Sun - Rise: 08:09, Set: 15:59, Transit: 12:04. Moon - Rise: 08:16, Set: 14:50. Civil Dark: 16:39 - 07:29. Nautical Dark: 17:22 - 06:46. Astro Dark: 18:03 - 06:05

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
15
21
28
31
32
45
28
17
17
17
16
21
26
30
23
26
26

Low Clouds (% Sky Obscured)

51
3
40
8
0
0
6
15
21
28
31
32
45
28
17
17
17
16
21
26
29
19
23
25

Medium Clouds (% Sky Obscured)

60
55
55
40
40
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

96
90
85
85
80
80
80
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 (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

87
90
87
85
85
85
88
88
90
90
86
84
81
81
82
84
88
91
91
91
93
93
94
94

Pressure (mb)

1008
1009
1010
1011
1011
1012
1013
1014
1015
1016
1016
1016
1016
1016
1016
1017
1017
1017
1017
1017
1017
1017
1017
1016

Ozone (du)

356
352
353
350
358
375
377
373
369
355
347
326
315
317
305
304
304
300
293
292
293
295
292
289

Saturday 20

New Moon 0%

09:10

15:45

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
20 Bad
21 Bad
22 Bad
23 Bad

Sun - Rise: 08:10, Set: 15:59, Transit: 12:05. Moon - Rise: 09:10, Set: 15:45. Civil Dark: 16:39 - 07:30. Nautical Dark: 17:23 - 06:46. Astro Dark: 18:04 - 06:06

Total Clouds (% Sky Obscured)

37
44
67
46
39
42
41
70
59
56
61
64
77
89
98
98
60
100
96
99
99
99
99
100

Low Clouds (% Sky Obscured)

33
41
66
46
39
42
41
65
59
56
57
52
52
50
45
41
29
50
50
56
57
55
56
52

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
2
55
60
58
54
28
46
47
46
61
84
86
88

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
2
15
36
60
88
92
60
96
84
94
87
94
96
98

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 (%)

3
9
25
4
1
2
1
1
3
3
2
1
0
0
0
0
0
0
0
0
0
1
3
3

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
7
8
8
9
9
9
10
10
10
12
13
14
13
12
12
11
11
11
11
11
11
11
12

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

91
91
91
91
90
88
91
91
93
93
91
90
85
85
85
85
86
88
86
86
83
83
83
82

Pressure (mb)

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

Ozone (du)

290
292
292
292
291
295
300
300
304
307
307
309
311
313
314
316
315
317
320
317
318
321
321
324

Sunday 21

Waxing Crescent 2%

09:50

16:52

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
20 Bad
21 Bad
22 Bad
23 Bad

Sun - Rise: 08:10, Set: 16:00, Transit: 12:05. Moon - Rise: 09:50, Set: 16:52. Civil Dark: 16:40 - 07:30. Nautical Dark: 17:23 - 06:47. Astro Dark: 18:04 - 06:06

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
99
99
99
100
100
100
97
96
59
81
92
99
100
100

Low Clouds (% Sky Obscured)

59
69
76
82
85
89
87
85
82
86
91
97
91
86
81
78
75
72
59
78
73
74
75
75

Medium Clouds (% Sky Obscured)

93
39
36
45
52
47
87
90
92
94
93
96
97
99
100
100
60
60
25
45
65
77
89
100

High Clouds (% Sky Obscured)

89
80
70
81
91
100
100
100
100
89
77
68
80
90
100
100
86
80
58
81
92
98
98
99

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
8
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
Light Rain
Very Light Rain
None
None
None
None

Precipitation Probability (%)

8
13
19
26
22
22
29
31
36
34
31
29
28
19
10
13
14
19
81
62
34
29
22
1

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.5
0.3
0
0
0
0

Wind Speed/Direction (mph)

12
12
12
12
12
12
12
12
13
14
13
12
13
14
13
13
12
12
12
8
7
7
6
6

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

83
86
90
91
93
94
94
96
93
91
91
90
85
87
87
87
87
91
90
90
91
91
91
91

Pressure (mb)

1003
1003
1003
1002
1002
1002
1002
1002
1002
1002
1003
1003
1003
1002
1002
1003
1003
1003
1004
1002
1003
1004
1004
1004

Ozone (du)

328
332
335
327
324
323
329
337
351
356
356
356
362
369
371
374
376
380
381
388
394
400
402
404

Monday 22

Waxing Crescent 6%

10:20

18:06

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
20 Bad
21 Bad
22 Bad
23 Bad

Sun - Rise: 08:11, Set: 16:00, Transit: 12:06. Moon - Rise: 10:20, Set: 18:06. Civil Dark: 16:40 - 07:31. Nautical Dark: 17:24 - 06:47. Astro Dark: 18:05 - 06:07

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
99
99
97
97
97
98
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

71
67
60
65
70
75
77
81
85
84
80
75
79
84
88
91
93
95
84
77
77
82
72
58

Medium Clouds (% Sky Obscured)

97
94
91
94
97
100
97
97
96
87
79
71
57
45
45
28
26
18
29
41
57
71
84
98

High Clouds (% Sky Obscured)

98
98
96
95
95
98
99
100
100
79
57
33
55
78
97
97
98
100
100
100
100
100
100
100

ISS Passover

Visibility (miles)

9
9
9
9
7
5
3
2
1
0
3
6
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
Very Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Very Light Rain
Very Light Rain
None
None
Very Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Very Light Rain
None
None

Precipitation Probability (%)

4
5
3
51
71
87
95
95
95
95
94
61
60
53
35
62
80
94
82
73
67
56
45
32

Precipitation Amount (mm)

0
0
0
0
0.3
0.5
0.8
1.1
1.4
1
0.6
0.2
0.2
0
0
0.3
0.4
0.6
0.5
0.4
0.4
0.3
0
0

Wind Speed/Direction (mph)

5
5
4
5
5
5
6
6
7
8
6
8
11
9
7
7
6
5
4
4
3
4
2
2

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

91
93
94
94
96
98
98
96
98
98
96
91
90
90
91
91
93
93
94
94
93
93
93
93

Pressure (mb)

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

Ozone (du)

406
407
409
411
412
414
416
418
420
422
423
425
427
422
418
414
411
408
405
405
405
405
406
407

Tuesday 23

Waxing Crescent 12%

10:42

19:24

Sun - Rise: 08:11, Set: 16:01, Transit: 12:06. Moon - Rise: 10:42, Set: 19:24. Civil Dark: 16:41 - 07:31. Nautical Dark: 17:24 - 06:48. Astro Dark: 18:05 - 06:07

Total Clouds (% Sky Obscured)

Low Clouds (% Sky Obscured)

Medium Clouds (% Sky Obscured)

High Clouds (% Sky Obscured)

ISS Passover

Visibility (miles)

Fog (%)

Precipitation Type

Precipitation Probability (%)

Precipitation Amount (mm)

Wind Speed/Direction (mph)

Chance of Frost

Temperature (°C)

Feels Like (°C)

Dew Point (°C)

Relative Humidity (%)

Pressure (mb)

Ozone (du)

Forecast for Swindon, Swindon, United Kingdom (51.56,-1.78)

Generated: 17/12/25 07:35:05. Forecast: 17/12/25 to 23/12/25. Timezone: UTC+0.00