Clear Outside v1.0 - International Weather Forecasts For Astronomers

Sunday 21

Waxing Crescent 6%

10:20

16:52

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
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad

Sun - Rise: 08:11, Set: 16:00, Transit: 12:06. Moon - Rise: 10:20, Set: 16:52. Civil Dark: 16:40 - 07:31. Nautical Dark: 17:23 - 06:47. Astro Dark: 18:04 - 06:07

Total Clouds (% Sky Obscured)

92
94
95
96
100
100
100
100
100
100
100
100
100
94
100
100
86
94
100
100
98
100
98
86

Low Clouds (% Sky Obscured)

84
80
81
89
100
100
84
93
99
90
85
87
83
88
100
100
78
87
77
56
64
79
76
80

Medium Clouds (% Sky Obscured)

92
94
95
96
83
97
93
100
84
84
61
72
32
0
41
59
15
36
86
27
60
12
46
54

High Clouds (% Sky Obscured)

84
92
94
96
98
100
100
100
100
100
100
100
100
87
100
85
77
67
100
100
87
100
97
73

ISS Passover

Visibility (miles)

9
9
9
9
9
1
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
Very Light Rain
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

20
23
44
67
61
46
37
48
51
31
18
8
14
9
21
17
4
9
4
11
1
1
0
0

Precipitation Amount (mm)

0
0
0
0.3
0.3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

10
10
12
12
12
13
13
14
14
15
15
15
14
13
12
11
11
10
8
7
7
7
6
5

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

9
8
8
8
8
8
8
8
9
8
8
8
8
8
8
8
8
8
8
8
8
8
8
9

Relative Humidity (%)

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

Pressure (mb)

1006
1005
1005
1005
1004
1004
1004
1004
1003
1003
1003
1003
1003
1003
1004
1004
1005
1006
1007
1007
1008
1008
1008
1008

Ozone (du)

362
361
362
364
368
374
378
380
381
383
384
384
383
383
383
382
382
383
384
387
389
392
395
396

Monday 22

Waxing Crescent 12%

10:42

18:06

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
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad

Sun - Rise: 08:11, Set: 16:00, Transit: 12:06. Moon - Rise: 10:42, Set: 18:06. Civil Dark: 16:40 - 07:31. Nautical Dark: 17:24 - 06:48. Astro Dark: 18:05 - 06:07

Total Clouds (% Sky Obscured)

97
93
78
88
85
90
98
95
98
100
100
97
98
100
100
100
100
100
100
100
99
98
97
100

Low Clouds (% Sky Obscured)

86
70
52
69
49
50
83
80
96
100
100
87
90
100
100
100
100
100
100
100
97
96
94
100

Medium Clouds (% Sky Obscured)

75
87
29
53
59
77
47
46
49
75
91
67
44
38
25
23
20
36
24
59
20
35
11
15

High Clouds (% Sky Obscured)

82
79
12
63
71
62
76
66
42
99
51
21
76
50
55
55
40
15
11
8
21
3
3
11

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
1
1
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
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)

4
5
4
4
5
6
7
8
9
8
8
9
9
10
11
12
12
13
13
13
14
13
14
15

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

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

Pressure (mb)

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

Ozone (du)

393
390
386
382
380
376
369
364
364
361
358
356
355
354
354
352
351
348
347
346
343
345
347
349

Tuesday 23

Waxing Crescent 12%

10:58

19:24

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
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad
14 OK

Sun - Rise: 08:12, Set: 16:01, Transit: 12:07. Moon - Rise: 10:58, 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)

98
96
94
95
91
92
94
88
88
82
88
90
93
92
95
92
88
60
68
63
51
51
47
40

Low Clouds (% Sky Obscured)

96
92
94
91
91
92
94
88
88
81
85
88
90
91
93
90
87
57
53
52
45
42
39
36

Medium Clouds (% Sky Obscured)

27
5
3
5
0
0
0
0
0
4
4
4
0
0
0
0
0
0
3
0
0
4
7
4

High Clouds (% Sky Obscured)

11
8
1
1
1
1
1
1
1
1
1
1
1
1
1
0
1
1
1
1
1
1
2
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
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
3
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

88
88
85
86
94
96
94
94
96
96
94
94
93
91
89
86
86
91
93
91
85
83
82
85

Pressure (mb)

1020
1021
1021
1022
1023
1024
1024
1025
1025
1026
1026
1027
1027
1028
1028
1029
1029
1030
1031
1032
1032
1032
1032
1032

Ozone (du)

351
349
348
348
346
343
335
333
332
331
330
327
327
326
324
321
319
319
318
320
321
320
320
319

Wednesday 24

Waxing Crescent 19%

11:12

20:42

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

Sun - Rise: 08:12, Set: 16:02, Transit: 12:07. Moon - Rise: 11:12, Set: 20:42. Civil Dark: 16:42 - 07:32. Nautical Dark: 17:25 - 06:48. Astro Dark: 18:06 - 06:08

Total Clouds (% Sky Obscured)

35
31
33
35
41
51
52
53
53
49
42
39
26
15
6
5
3
1
1
0
0
1
3
4

Low Clouds (% Sky Obscured)

35
31
33
35
41
51
52
53
53
49
42
39
26
15
6
4
3
1
1
0
0
1
3
4

Medium Clouds (% Sky Obscured)

0
0
0
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)

1
0
0
0
0
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
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)

17
17
17
17
17
17
16
17
17
17
17
18
18
18
18
18
18
18
19
19
20
21
20
20

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

86
86
86
86
88
86
86
88
88
88
88
84
84
84
88
88
84
84
84
80
73
69
67
64

Pressure (mb)

1032
1033
1033
1034
1034
1034
1034
1034
1034
1034
1034
1034
1033
1033
1032
1032
1032
1032
1031
1031
1030
1029
1029
1029

Ozone (du)

320
320
321
321
320
324
326
327
328
329
331
331
332
333
337
339
343
346
350
351
351
352
352
351

Thursday 25

Waxing Crescent 28%

11:23

22:00

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

Sun - Rise: 08:12, Set: 16:02, Transit: 12:08. Moon - Rise: 11:23, Set: 22:00. Civil Dark: 16:42 - 07:32. Nautical Dark: 17:26 - 06:49. Astro Dark: 18:06 - 06:08

Total Clouds (% Sky Obscured)

3
1
0
11
22
34
39
42
45
47
49
51
42
34
24
89
85
84
91
94
98
97
96
95

Low Clouds (% Sky Obscured)

3
1
0
11
22
34
39
42
45
47
49
51
42
31
20
84
85
84
91
94
98
97
96
90

Medium Clouds (% Sky Obscured)

0
0
0
0
0
2
1
0
0
0
0
1
16
34
24
75
55
34
30
24
19
18
17
18

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
7
8
8
6
8
10
7
4
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
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
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)

20
19
18
18
17
16
15
14
13
13
12
12
11
11
11
10
12
12
13
13
13
13
13
12

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-4
-4
-5
-6
-5
-5
-5
-5
-5
-5
-5
-5
-5
-5
-6
-5
-5
-4
-4
-5
-5
-5
-1
-1

Dew Point (°C)

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

Relative Humidity (%)

63
63
64
65
66
69
72
77
80
83
84
84
87
89
89
91
91
91
92
86
81
76
79
82

Pressure (mb)

1028
1029
1029
1029
1029
1030
1030
1030
1030
1030
1030
1030
1030
1030
1030
1030
1030
1030
1030
1030
1030
1030
1031
1031

Ozone (du)

351
353
354
356
357
355
355
357
358
356
357
356
358
361
357
359
360
361
362
360
357
355
354
353

Friday 26

Waxing Crescent 39%

11:35

23:19

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
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 OK
11 Good
12 Good
13 Good
14 Good

Sun - Rise: 08:12, Set: 16:03, Transit: 12:08. Moon - Rise: 11:35, Set: 23:19. Civil Dark: 16:43 - 07:32. Nautical Dark: 17:26 - 06:49. Astro Dark: 18:07 - 06:08

Total Clouds (% Sky Obscured)

89
83
78
80
83
86
86
87
87
83
73
64
60
61
64
67
69
72
56
31
8
9
11
10

Low Clouds (% Sky Obscured)

85
83
74
77
75
73
60
56
52
42
41
40
41
41
38
26
14
0
1
0
0
0
0
0

Medium Clouds (% Sky Obscured)

13
8
4
3
2
0
0
0
0
0
0
0
0
1
1
16
31
46
40
31
8
9
8
0

High Clouds (% Sky Obscured)

10
35
50
35
20
10
9
4
0
0
0
0
0
0
6
35
50
62
46
27
8
6
4
4

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
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)

11
11
10
10
9
9
9
9
9
9
10
10
10
10
10
10
11
11
11
12
13
14
15
15

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

85
88
91
94
94
94
94
92
94
92
92
92
92
92
94
96
94
93
91
89
86
86
85
86

Pressure (mb)

1031
1031
1032
1032
1033
1033
1034
1034
1034
1034
1034
1034
1034
1034
1034
1035
1035
1035
1036
1035
1035
1035
1035
1035

Ozone (du)

352
352
352
353
353
354
355
355
354
354
355
355
356
357
357
358
361
363
365
365
364
364
361
359

Saturday 27

First Quarter 50%

11:47

00:40

15 OK
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: 08:12, Set: 16:04, Transit: 12:09. Moon - Rise: 11:47, Set: 00:40. Civil Dark: 16:44 - 07:32. Nautical Dark: 17:27 - 06:49. Astro Dark: 18:08 - 06:08

Total Clouds (% Sky Obscured)

35
61
87
83
78
73
74
75
75
80
87
96
91
88
81
73
63
51
50
49
47

Low Clouds (% Sky Obscured)

23
45
68
69
70
69
69
68
67
65
58
57
45
38
35
34
34
34
25
16
7

Medium Clouds (% Sky Obscured)

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

High Clouds (% Sky Obscured)

23
41
52
35
20
6
13
19
22
8
5
0
0
4
4
3
4
3
13
22
30

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

Fog (%)

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

Precipitation Probability (%)

0
0
0
0
0
0
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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

85
83
80
79
82
85
89
91
93
93
94
94
98
96
96
98
96
98
96
94
89

Pressure (mb)

1034
1035
1035
1035
1035
1036
1036
1036
1036
1036
1036
1036
1036
1036
1036
1036
1036
1037
1037
1037
1036

Ozone (du)

356
355
354
353
352
350
349
348
346
345
343
341
339
336
334
331
328
324
320
319
317

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

Generated: 21/12/25 15:39:33. Forecast: 21/12/25 to 27/12/25. Timezone: UTC+0.00