Clear Outside v1.0 - International Weather Forecasts For Astronomers

Saturday 20

New Moon 2%

09:45

16:59

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
16 Bad
17 Bad
18 Bad

Sun - Rise: 08:06, Set: 16:05, Transit: 12:06. Moon - Rise: 09:45, Set: 16:59. Civil Dark: 16:44 - 07:27. Nautical Dark: 17:26 - 06:45. Astro Dark: 18:06 - 06:05

Total Clouds (% Sky Obscured)

100
99
98
95
100
100
100
94
96
91
100
98
99
100
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

79
80
63
86
64
61
60
58
56
54
50
58
66
63
68
81
90
78
74
73
96
72
88
93

Medium Clouds (% Sky Obscured)

92
68
98
78
98
97
76
87
54
54
100
96
93
96
100
100
100
100
100
100
100
100
100
100

High Clouds (% Sky Obscured)

100
91
85
85
98
100
100
74
74
83
87
92
96
100
100
93
100
100
85
85
100
100
100
100

ISS Passover

Visibility (miles)

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

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

Precipitation Probability (%)

2
10
7
55
45
38
46
39
23
9
16
16
21
38
58
58
56
63
54
56
75
82
86
91

Precipitation Amount (mm)

0
0
0
0.3
0
0
0.2
0
0
0
0
0
0
0
0.3
0.3
0.3
0.5
0.3
0.3
0.5
0.6
0.8
0.8

Wind Speed/Direction (mph)

13
14
14
14
14
13
11
10
10
7
6
5
6
6
7
9
11
12
13
11
11
11
11
12

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

87
88
90
93
88
82
84
88
88
90
91
91
91
93
93
91
90
88
87
87
90
93
95
93

Pressure (mb)

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

Ozone (du)

304
308
314
322
328
329
326
322
326
329
326
330
334
340
353
359
365
373
374
374
374
373
374
377

Sunday 21

Waxing Crescent 6%

10:16

18:12

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
16 Bad
17 Bad
18 Bad

Sun - Rise: 08:07, Set: 16:06, Transit: 12:06. Moon - Rise: 10:16, Set: 18:12. Civil Dark: 16:45 - 07:28. Nautical Dark: 17:27 - 06:46. Astro Dark: 18:07 - 06:06

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
93
100
94
100
100
96
86
93
77
68
64
67
85
89
100

Low Clouds (% Sky Obscured)

87
73
65
76
76
80
71
85
80
70
64
62
67
58
68
57
72
69
65
53
48
76
78
80

Medium Clouds (% Sky Obscured)

100
100
100
100
97
50
60
58
55
48
36
16
27
34
47
53
60
4
5
22
49
49
88
29

High Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
64
100
80
99
100
75
35
32
33
22
39
30
17
22
100

ISS Passover

Visibility (miles)

3
3
5
5
6
8
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

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

Precipitation Probability (%)

95
95
95
95
80
67
53
52
50
30
24
20
15
2
4
4
14
22
22
20
3
0
1
0

Precipitation Amount (mm)

1.1
0.8
0.7
0.7
0.4
0.4
0.2
0.3
0.4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

13
16
18
16
16
16
15
14
13
12
12
11
10
10
10
10
10
9
10
10
11
8
7
7

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

9
10
9
9
9
10
9
9
8
9
8
8
8
8
8
9
9
9
9
9
9
8
8
8

Relative Humidity (%)

96
96
93
93
91
93
90
90
91
93
91
90
90
95
93
91
91
90
88
90
90
90
93
91

Pressure (mb)

1002
1002
1002
1002
1001
1001
1001
1001
1001
1001
1001
1002
1002
1003
1003
1004
1004
1004
1004
1005
1005
1006
1007
1007

Ozone (du)

379
384
388
390
391
391
390
389
391
392
392
391
391
391
392
392
391
391
390
389
389
390
390
389

Monday 22

Waxing Crescent 12%

10:38

No Set

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
16 Bad
17 Bad
18 Bad

Sun - Rise: 08:07, Set: 16:06, Transit: 12:07. Moon - Rise: 10:38, Set: No Set. Civil Dark: 16:45 - 07:28. Nautical Dark: 17:28 - 06:46. Astro Dark: 18:08 - 06:06

Total Clouds (% Sky Obscured)

63
69
87
86
80
91
90
94
95
92
91
97
94
97
98
92
97
98
98
98
99
99
100
100

Low Clouds (% Sky Obscured)

62
48
45
46
35
46
59
66
70
70
76
85
82
94
91
88
96
97
98
98
99
99
100
100

Medium Clouds (% Sky Obscured)

7
6
16
38
18
37
22
61
63
50
28
40
37
20
12
3
3
3
2
2
1
2
4
8

High Clouds (% Sky Obscured)

21
53
71
48
56
59
56
69
74
44
41
48
37
35
33
21
22
16
11
15
10
1
1
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
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
37
1
1
1
1
1
1
1

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
15
7
6
7
15
7
9

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
5
4
4
5
6
6
7
8
8
8
8
9
9
11
12
12
13
14
14
14
15
15
14

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

91
90
91
91
93
91
95
96
93
94
94
94
94
93
93
91
91
90
87
82
81
81
78
78

Pressure (mb)

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

Ozone (du)

386
383
381
380
378
377
376
373
372
369
365
363
363
362
359
359
359
359
357
358
358
359
352
346

Tuesday 23

Waxing Crescent 19%

10:56

19:29

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 OK
11 OK
12 OK
13 OK
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad

Sun - Rise: 08:08, Set: 16:07, Transit: 12:07. Moon - Rise: 10:56, Set: 19:29. Civil Dark: 16:46 - 07:29. Nautical Dark: 17:28 - 06:46. Astro Dark: 18:08 - 06:06

Total Clouds (% Sky Obscured)

100
100
98
97
95
94
93
91
93
93
95
90
84
79
70
29
16
25
35
44
50
62
79
72

Low Clouds (% Sky Obscured)

100
100
98
96
94
90
88
85
87
89
92
84
78
72
63
29
16
25
35
44
47
49
54
57

Medium Clouds (% Sky Obscured)

10
12
8
3
0
0
0
0
1
2
0
0
0
0
0
0
0
0
2
1
1
1
3
0

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
4
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 (%)

1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

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 (%)

11
19
15
16
20
19
19
13
13
16
10
9
14
3
3
1
0
0
0
0
4
6
6
10

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)

14
14
15
15
14
14
14
14
14
15
16
16
17
17
17
17
17
17
17
17
17
17
17
17

Chance of Frost

Temperature (°C)

6
6
6
6
6
5
5
5
6
6
6
6
6
6
5
5
5
6
6
6
5
5
4
4

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

79
83
82
79
86
91
86
85
82
79
76
76
74
72
72
75
76
72
72
72
74
73
73
75

Pressure (mb)

1020
1020
1021
1021
1022
1022
1022
1023
1023
1023
1024
1024
1025
1026
1027
1027
1028
1028
1028
1028
1028
1028
1028
1028

Ozone (du)

345
343
339
336
334
332
333
336
337
335
334
335
335
335
337
338
338
339
337
339
341
342
343
348

Wednesday 24

Waxing Crescent 28%

11:10

20:46

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
16 Bad
17 Bad
18 Bad

Sun - Rise: 08:08, Set: 16:08, Transit: 12:08. Moon - Rise: 11:10, Set: 20:46. Civil Dark: 16:47 - 07:29. Nautical Dark: 17:29 - 06:47. Astro Dark: 18:09 - 06:07

Total Clouds (% Sky Obscured)

47
42
42
43
39
48
57
69
65
67
68
97
98
100
100
100
100
100
100
100
98
96
99
99

Low Clouds (% Sky Obscured)

47
42
42
43
39
48
57
65
65
67
68
68
66
64
68
67
75
77
80
82
82
82
82
78

Medium Clouds (% Sky Obscured)

0
0
0
0
0
19
35
56
64
67
65
49
38
39
35
35
45
53
61
68
74
86
99
71

High Clouds (% Sky Obscured)

1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2
5
7
2

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
6
3
0

Fog (%)

1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
Snow
Snow
Snow
Snow
Snow
Snow

Precipitation Probability (%)

11
10
13
13
9
15
13
8
23
27
28
43
44
41
49
52
48
50
52
53
64
68
63
63

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

17
17
16
16
15
14
15
15
15
15
15
16
15
15
14
14
15
16
16
17
17
17
17
18

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

74
76
76
76
76
77
77
77
78
80
78
76
74
73
71
68
62
58
59
60
61
65
72
78

Pressure (mb)

1028
1028
1028
1028
1028
1027
1027
1027
1026
1025
1025
1024
1024
1024
1024
1023
1023
1022
1022
1021
1021
1021
1021
1021

Ozone (du)

350
354
357
356
354
354
352
351
349
349
350
352
354
356
358
366
374
382
382
382
382
382
381
381

Thursday 25

Waxing Crescent 39%

11:23

22:03

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
16 Bad
17 Bad
18 Bad

Sun - Rise: 08:08, Set: 16:08, Transit: 12:08. Moon - Rise: 11:23, Set: 22:03. Civil Dark: 16:47 - 07:29. Nautical Dark: 17:30 - 06:47. Astro Dark: 18:09 - 06:07

Total Clouds (% Sky Obscured)

99
99
99
99
98
97
97
96
96
96
96
98
99
100
87
73
61
55
48
42
57
71
84
81

Low Clouds (% Sky Obscured)

74
70
71
71
70
68
65
71
75
80
80
87
93
100
87
73
61
55
48
42
57
71
84
81

Medium Clouds (% Sky Obscured)

39
9
13
17
29
34
38
46
55
60
55
51
33
24
14
3
1
1
1
0
0
0
0
0

High Clouds (% Sky Obscured)

1
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
0
0
0
0
0
0
0
0

ISS Passover

Visibility (miles)

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

Fog (%)

1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

Precipitation Type

Snow
Snow
Snow
Snow
Snow
Snow
Snow
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

66
69
65
61
57
52
47
40
41
38
36
36
34
32
33
26
17
15
11
3
7
9
9
8

Precipitation Amount (mm)

0.2
0.3
0.3
0.2
0.2
0.1
0.1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

16
15
14
14
13
12
12
12
12
12
12
12
12
12
11
11
11
12
11
11
11
10
9
8

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-7
-7
-7
-7
-7
-7
-7
-7
-6
-7
-7
-7
-6
-6
-6
-5
-6
-5
-2
-2
-2
-2
-2
-2

Dew Point (°C)

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

Relative Humidity (%)

80
83
84
84
81
81
83
81
83
84
86
87
87
87
88
84
81
79
79
80
83
84
88
92

Pressure (mb)

1021
1021
1021
1021
1021
1022
1022
1022
1022
1022
1022
1023
1023
1024
1025
1025
1025
1026
1026
1026
1027
1027
1028
1028

Ozone (du)

380
380
380
379
378
377
377
377
376
374
371
368
367
367
366
364
363
361
360
359
359
358
358
358

Friday 26

Waxing Crescent 50%

11:36

23:20

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: 16:09, Transit: 12:09. Moon - Rise: 11:36, Set: 23:20. Civil Dark: 16:48 - 07:29. Nautical Dark: 17:30 - 06:47. Astro Dark: 18:10 - 06:07

Total Clouds (% Sky Obscured)

80
78
85
92
99
99
98
98
99
99
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

80
78
85
92
98
97
96
96
98
99
100
100
100
100
100
100
100

Medium Clouds (% Sky Obscured)

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

High Clouds (% Sky Obscured)

1
1
2
2
2
1
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

Fog (%)

1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

Precipitation Type

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

Precipitation Probability (%)

7
5
12
16
19
23
23
22
22
23
22
23
22
21
23
23
19

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-1
-1
-1
-1
-1
0
-0
0
0
1
1
1
1
1
1
1
1

Relative Humidity (%)

92
92
92
91
89
89
85
83
82
83
83
86
88
89
93
88
85

Pressure (mb)

1029
1029
1030
1030
1030
1030
1030
1030
1030
1031
1031
1031
1031
1031
1032
1032
1032

Ozone (du)

359
361
362
362
361
361
361
360
360
359
358
357
357
357
357
359
360

Forecast for Swanage, Dorset, United Kingdom (50.61,-1.96)

Generated: 20/12/25 19:40:09. Forecast: 20/12/25 to 26/12/25. Timezone: UTC+0.00