Clear Outside v1.0 - International Weather Forecasts For Astronomers

Thursday 18

Waning Crescent 3%

07:12

14:09

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
00 Bad
01 Bad
02 Bad
03 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
99
100
99
100
100
100
100
88
96
100

Low Clouds (% Sky Obscured)

46
52
67
71
78
100
100
84
91
77
78
93
75
76
65
90
68
72
81
45
40
43
17
0

Medium Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
96
100
100
80
81
100
95
97
100
77
99
73
70
50

High Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
100
100
93
88
76
100
100
100
100
88
96
100

ISS Passover

Visibility (miles)

9
9
9
9
1
9
1
3
3
2
3
4
9
9
9
9
6
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
5
9
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

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

Precipitation Probability (%)

7
1
0
54
81
95
95
95
95
95
95
95
54
4
8
63
59
25
26
4
0
0
0
0

Precipitation Amount (mm)

0
0
0
0.2
0.4
1.1
2
2.8
2.2
1.7
0.9
0.7
0.3
0
0
0.3
0.3
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

8
8
7
8
8
7
7
5
3
3
1
1
3
5
5
3
4
4
5
5
3
3
3
1

Dew Point (°C)

10
9
9
9
10
9
10
9
8
8
8
8
8
9
7
8
8
8
7
7
5
4
4
4

Relative Humidity (%)

95
95
95
96
98
95
98
95
95
93
91
90
91
95
85
90
90
87
88
90
85
87
88
86

Pressure (mb)

1006
1006
1007
1006
1006
1005
1005
1003
1001
999
999
999
999
1000
1001
1002
1003
1003
1005
1006
1007
1009
1010
1010

Ozone (du)

307
304
300
298
291
289
290
290
289
288
286
290
294
301
314
324
335
343
346
349
349
348
352
360

Friday 19

Waning Crescent 1%

08:16

14:50

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

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
40
25
34
46
43
50
30
26
29
31
35
42
27
29
41
52
56
48
45
56

Low Clouds (% Sky Obscured)

0
9
4
16
30
25
34
46
43
50
30
26
29
31
35
42
27
29
41
52
56
48
45
56

Medium Clouds (% Sky Obscured)

27
40
18
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

100
100
94
95
7
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
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
1
0
0
0
0
0
0
0
0
0
0
0
2
6
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)

11
11
12
12
11
12
12
13
13
13
12
10
8
8
7
6
5
5
4
5
5
5
5
6

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

86
83
83
85
86
88
86
85
84
85
85
87
90
93
91
93
93
93
94
94
94
94
94
93

Pressure (mb)

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

Ozone (du)

359
359
361
366
377
373
368
360
352
342
310
304
298
288
282
281
282
284
285
288
290
291
287
286

Saturday 20

New Moon 0%

09:10

15:45

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
00 Bad
01 Bad
02 Bad
03 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)

55
66
59
71
80
67
69
65
63
88
80
83
92
94
93
88
92
86
98
97
97
97
97
97

Low Clouds (% Sky Obscured)

55
66
59
71
80
67
69
63
47
66
53
38
44
49
46
37
46
76
63
61
79
70
82
81

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
10
79
80
85
80
80
75
70
70
70
65
69
76
83
87

High Clouds (% Sky Obscured)

0
0
1
0
0
1
1
7
14
14
15
29
46
59
66
57
65
62
85
84
82
82
80
75

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 (%)

18
5
0
0
0
2
0
2
4
15
1
0
0
0
1
2
1
2
3
8
12
9
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
6
8
8
8
9
11
13
13
13
13
12
11
11
11
12
11
10
10
11
11
10
9
9

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

93
94
89
91
89
90
90
87
85
85
85
87
85
83
82
80
83
86
91
93
91
91
94
94

Pressure (mb)

1014
1014
1013
1013
1013
1013
1012
1011
1010
1010
1009
1009
1009
1009
1008
1008
1008
1008
1008
1007
1007
1007
1007
1007

Ozone (du)

285
283
290
293
300
302
302
302
305
308
310
307
304
303
302
300
300
299
302
307
308
312
327
337

Sunday 21

Waxing Crescent 2%

09:50

16:52

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
00 Bad
01 Bad
02 Bad
03 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)

98
99
98
97
96
97
99
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

67
76
76
80
84
89
94
100
100
97
95
99
98
99
100
98
88
97
98
92
95
94
100
89

Medium Clouds (% Sky Obscured)

89
93
84
76
69
73
84
91
88
87
84
67
48
6
35
40
35
30
26
28
25
25
29
30

High Clouds (% Sky Obscured)

69
67
61
58
55
70
85
100
71
38
7
6
6
15
23
31
42
46
43
40
29
21
9
20

ISS Passover

Visibility (miles)

9
9
9
2
9
9
9
3
0
0
1
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
Light Rain
Light Rain
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

6
7
8
7
7
15
60
65
31
29
28
20
13
16
7
14
6
6
2
0
0
1
0
1

Precipitation Amount (mm)

0
0
0
0
0
0
0.4
0.5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

10
11
12
13
13
12
12
12
11
10
10
11
10
10
10
10
10
10
10
11
12
12
12
11

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

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

Pressure (mb)

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

Ozone (du)

348
354
361
365
366
366
369
371
377
384
391
398
404
404
402
401
400
401
400
400
401
400
399
399

Monday 22

Waxing Crescent 6%

10:20

18:06

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
00 Bad
01 Bad
02 Bad
03 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
99
99
98
97
100
100
100
100
99
99
99
100
100
100

Low Clouds (% Sky Obscured)

91
90
90
86
99
100
100
99
100
100
99
98
95
93
81
85
89
92
95
99
99
100
95
95

Medium Clouds (% Sky Obscured)

76
66
62
60
70
66
67
56
32
28
27
55
58
56
98
98
98
87
72
57
38
26
16
26

High Clouds (% Sky Obscured)

31
37
32
28
37
34
27
6
52
68
79
61
40
20
100
100
100
97
93
90
93
97
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
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

1
0
1
1
0
2
3
4
2
1
2
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

4
4
4
4
4
4
5
5
5
5
5
5
4
4
4
4
4
4
4
4
4
2
2
2

Dew Point (°C)

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

Relative Humidity (%)

91
94
93
94
91
91
88
87
81
81
84
88
91
91
93
93
93
93
94
94
94
96
94
94

Pressure (mb)

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

Ozone (du)

401
400
400
400
403
405
409
414
416
417
418
417
415
415
414
412
409
407
405
403
401
400
398
396

Tuesday 23

Waxing Crescent 12%

10:42

19:24

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
00 Bad
01 Bad
02 Bad
03 Bad

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)

100
100
100
100
100
100
100
100
94
89
85
87
88
89
91
93
90
87
80
79
65
50
32
37

Low Clouds (% Sky Obscured)

100
95
95
91
88
84
91
100
94
89
85
87
87
87
87
85
82
77
76
75
58
41
24
30

Medium Clouds (% Sky Obscured)

39
46
54
70
86
87
88
90
84
78
59
73
71
74
60
44
24
35
47
58
62
50
32
37

High Clouds (% Sky Obscured)

100
100
83
58
29
32
31
31
21
10
0
0
0
10
35
40
40
45
35
35
30
20
10
10

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
1
1
1
2
2
1
2
3
2
4
4
1
3
3
1
2
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
10
10
10
10
10
10
10
11
12
13
13
13
13
13
12
13
12
12
12
12
13
13
14

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

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

Pressure (mb)

1015
1015
1016
1016
1017
1017
1017
1017
1018
1018
1018
1018
1018
1019
1019
1019
1020
1020
1020
1020
1020
1020
1020
1020

Ozone (du)

396
396
395
395
395
394
394
393
393
390
387
383
381
378
375
373
371
370
369
369
368
368
367
366

Wednesday 24

Waxing Crescent 19%

10:58

20:42

Sun - Rise: 08:12, Set: 16:02, Transit: 12:07. Moon - Rise: 10:58, Set: 20:42. Civil Dark: 16:42 - 07:31. Nautical Dark: 17:25 - 06:48. Astro Dark: 18:06 - 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: 18/12/25 04:16:20. Forecast: 18/12/25 to 24/12/25. Timezone: UTC+0.00