Clear Outside v1.0 - International Weather Forecasts For Astronomers

Monday 15

Waning Crescent 19%

No Rise

13:03

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: 08:06, Set: 15:58, Transit: 12:02. Moon - Rise: No Rise, Set: 13:03. Civil Dark: 16:38 - 07:26. Nautical Dark: 17:21 - 06:43. Astro Dark: 18:02 - 06:02

Total Clouds (% Sky Obscured)

100
100
99
99
94
92
75
74
84
65
77
84
100
100
100
100
100
100
99
100
100
99
98
97

Low Clouds (% Sky Obscured)

83
81
88
83
75
85
75
74
72
65
77
74
75
77
67
82
86
80
92
85
93
82
42
31

Medium Clouds (% Sky Obscured)

52
51
58
34
61
19
0
0
0
0
0
26
84
86
100
100
100
100
94
96
96
92
96
96

High Clouds (% Sky Obscured)

90
61
11
1
0
0
0
0
23
0
0
0
3
100
100
100
100
97
95
97
96
89
89
78

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
7
5
4
9
9
9
9
9
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
None
None
None
None
None
None
None
Very Light Rain
Light Rain
Light Rain
Very Light Rain
Very Light Rain
None
None
None
Very Light Rain
Light Rain

Precipitation Probability (%)

10
14
14
13
7
4
5
8
8
22
13
26
23
51
71
89
95
75
58
36
44
39
46
63

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.3
0.5
0.7
0.3
0.2
0
0
0
0.2
0.5

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

85
88
78
73
74
78
84
87
87
84
85
90
91
91
93
91
91
93
93
93
90
90
94
94

Pressure (mb)

1006
1006
1005
1005
1005
1005
1005
1005
1004
1004
1003
1003
1003
1003
1003
1003
1002
1002
1003
1003
1003
1003
1004
1004

Ozone (du)

291
295
297
300
301
302
303
303
303
304
305
305
305
304
304
304
303
304
302
300
299
297
296
296

Tuesday 16

Waning Crescent 12%

04:47

13:19

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 Good
17 Good
18 Good
19 Good
20 Good
21 Good
22 OK
23 OK
00 Bad
01 Bad
02 Bad
03 Bad

Sun - Rise: 08:06, Set: 15:58, Transit: 12:02. Moon - Rise: 04:47, Set: 13:19. Civil Dark: 16:38 - 07:26. Nautical Dark: 17:21 - 06:43. Astro Dark: 18:02 - 06:03

Total Clouds (% Sky Obscured)

98
97
97
81
100
89
100
97
100
100
100
78
0
0
0
0
0
0
29
27
47
100
94
100

Low Clouds (% Sky Obscured)

23
16
0
3
0
0
0
6
0
0
0
0
0
0
0
0
0
0
29
27
10
0
0
0

Medium Clouds (% Sky Obscured)

98
95
97
81
100
89
100
97
100
92
93
78
0
0
0
0
0
0
0
0
0
2
7
15

High Clouds (% Sky Obscured)

81
60
55
58
55
50
54
30
14
22
12
25
0
0
0
0
0
0
0
1
34
91
76
87

ISS Passover

Visibility (miles)

3
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
3
68
84
89
100
100
100
100

Precipitation Type

Light Rain
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
22
8
5
2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Amount (mm)

0.4
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
10
8
8
8
7
8
8
8
7
7
4
4
3
3
3
3
3
3
2
3
3
4

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

96
96
94
90
90
88
85
82
84
84
87
88
91
91
93
93
93
94
93
91
91
89
89
88

Pressure (mb)

1005
1006
1008
1009
1010
1011
1012
1013
1013
1014
1014
1015
1016
1016
1017
1018
1018
1019
1019
1019
1019
1019
1019
1019

Ozone (du)

297
298
296
297
305
316
317
321
331
344
343
339
344
352
352
359
356
343
338
337
332
326
324
320

Wednesday 17

Waning Crescent 7%

06:00

13:41

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: 08:07, Set: 15:59, Transit: 12:03. Moon - Rise: 06:00, Set: 13:41. Civil Dark: 16:39 - 07:27. Nautical Dark: 17:22 - 06:44. Astro Dark: 18:02 - 06:03

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)

24
31
36
4
29
57
77
77
88
88
62
62
100
100
100
100
100
100
100
100
100
100
100
96

Medium Clouds (% Sky Obscured)

40
35
39
29
86
79
100
100
75
100
31
98
16
24
28
27
32
29
88
88
98
99
98
100

High Clouds (% Sky Obscured)

82
99
100
100
98
100
100
100
100
100
15
1
0
1
0
0
28
100
91
100
100
100
100
100

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
7
9
7
7
5
7

Fog (%)

100
100
100
96
95
54
55
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
Very Light Rain
None
None
None
Very Light Rain
None
Light Rain
Light Rain
Light Rain
Light Rain

Precipitation Probability (%)

0
0
0
0
6
25
40
46
47
30
24
33
18
37
57
44
29
35
53
55
70
95
84
95

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.3
0
0
0
0.3
0
0.4
0.9
0.5
0.5

Wind Speed/Direction (mph)

5
6
6
7
8
9
10
12
14
15
16
17
16
17
18
18
19
19
19
19
19
18
17
17

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

86
88
86
88
86
85
83
82
82
82
84
84
85
87
87
87
87
87
88
88
88
91
93
93

Pressure (mb)

1019
1019
1019
1019
1019
1018
1018
1018
1017
1016
1015
1015
1015
1014
1014
1014
1013
1013
1013
1013
1012
1012
1011
1011

Ozone (du)

319
317
313
309
306
303
302
302
300
299
300
299
298
297
297
298
301
304
303
299
300
302
299
297

Thursday 18

Waning Crescent 3%

07:11

14:10

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: 08:08, Set: 15:59, Transit: 12:03. Moon - Rise: 07:11, Set: 14:10. Civil Dark: 16:39 - 07:28. 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
89
78
68
63

Low Clouds (% Sky Obscured)

91
86
86
88
90
87
84
82
88
94
100
96
93
90
89
88
81
58
44
28
25
20
15
23

Medium Clouds (% Sky Obscured)

100
100
100
81
73
62
100
88
99
52
97
97
98
99
99
99
92
96
93
89
86
78
68
63

High Clouds (% Sky Obscured)

100
94
100
100
100
100
100
100
99
100
100
100
100
100
100
100
98
79
94
100
72
45
12
15

ISS Passover

Visibility (miles)

7
7
9
9
9
9
9
9
9
7
3
4
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

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

Precipitation Probability (%)

95
95
95
95
95
95
94
80
95
95
95
95
78
59
47
44
46
48
43
37
26
13
0
0

Precipitation Amount (mm)

0.6
0.6
0.6
0.8
0.7
0.5
0.4
0.3
0.6
0.9
1.1
0.8
0.3
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

17
16
17
18
20
21
23
24
26
27
27
27
27
26
23
21
20
19
16
14
12
11
11
11

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

9
9
8
8
8
8
7
7
8
9
9
9
9
10
10
9
9
8
8
6
5
5
4
4

Relative Humidity (%)

93
93
93
90
90
90
87
85
87
90
91
91
90
91
93
88
88
87
91
87
87
88
88
88

Pressure (mb)

1010
1010
1009
1008
1007
1006
1004
1003
1002
1001
1000
999
999
999
1000
1001
1002
1003
1004
1006
1007
1008
1009
1009

Ozone (du)

295
293
292
289
289
287
286
283
286
292
296
291
295
296
308
320
319
327
341
346
348
346
348
347

Friday 19

Waning Crescent 1%

08:15

14:51

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

Sun - Rise: 08:08, Set: 15:59, Transit: 12:04. Moon - Rise: 08:15, Set: 14:51. Civil Dark: 16:39 - 07:28. Nautical Dark: 17:22 - 06:45. Astro Dark: 18:03 - 06:05

Total Clouds (% Sky Obscured)

57
54
41
51
55
50
51
52
48
45
41
38
39
35
18
30
40
66
82
94
96
98
100
100

Low Clouds (% Sky Obscured)

34
42
41
41
43
46
49
47
46
42
39
38
37
35
18
30
40
58
59
61
66
71
72
71

Medium Clouds (% Sky Obscured)

12
0
2
21
35
27
34
33
29
32
30
35
26
0
0
0
0
0
0
0
8
20
30
30

High Clouds (% Sky Obscured)

17
15
1
0
0
0
0
0
0
0
0
0
0
0
1
1
2
25
49
72
67
62
57
70

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
2
5
7
6
9
9
2
1
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

88
88
88
88
88
86
86
84
82
81
84
88
91
91
91
91
91
90
90
90
90
88
88
90

Pressure (mb)

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

Ozone (du)

350
355
365
369
365
366
361
359
345
334
339
348
338
318
308
306
304
302
297
293
288
287
286
286

Saturday 20

New Moon 0%

09:08

15:46

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: 16:00, Transit: 12:04. Moon - Rise: 09:08, Set: 15:46. Civil Dark: 16:40 - 07:29. Nautical Dark: 17:23 - 06:46. Astro Dark: 18:04 - 06:05

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
98
89
81
78
81
85
86
89
91
84
72
65
70
75
79
86

Low Clouds (% Sky Obscured)

75
71
62
51
41
36
35
34
32
34
36
42
46
48
61
73
82
72
65
59
60
61
62
65

Medium Clouds (% Sky Obscured)

35
30
25
15
15
15
15
15
20
25
40
23
21
15
7
2
0
0
1
1
21
42
62
64

High Clouds (% Sky Obscured)

83
100
100
100
100
100
100
100
98
89
81
68
35
9
19
18
15
26
28
35
31
22
14
43

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

Precipitation Probability (%)

6
12
47
68
83
72
58
43
35
28
19
15
12
6
9
7
0
2
2
0
0
0
0
3

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

14
13
12
11
11
11
11
12
12
12
12
12
11
9
8
9
8
8
8
8
7
7
6
7

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

4
4
4
4
4
4
4
4
4
4
4
4
4
3
3
2
2
2
2
2
2
2
2
2

Relative Humidity (%)

88
90
90
88
88
86
85
82
81
82
85
87
86
86
88
85
83
82
80
82
82
85
86
89

Pressure (mb)

1012
1011
1011
1010
1010
1010
1009
1009
1008
1008
1007
1006
1006
1006
1006
1005
1005
1005
1005
1004
1004
1004
1004
1004

Ozone (du)

284
283
282
284
286
288
292
295
298
302
306
310
312
315
318
319
321
322
322
322
321
319
317
315

Sunday 21

Waxing Crescent 2%

09:49

16:53

Sun - Rise: 08:09, Set: 16:00, Transit: 12:05. Moon - Rise: 09:49, Set: 16:53. Civil Dark: 16:40 - 07:29. Nautical Dark: 17:23 - 06:46. Astro Dark: 18:04 - 06:06

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 Marlborough, Wiltshire, United Kingdom (51.42,-1.73)

Generated: 15/12/25 04:41:20. Forecast: 15/12/25 to 21/12/25. Timezone: UTC+0.00