Clear Outside v1.0 - International Weather Forecasts For Astronomers

Friday 21

Waxing Gibbous 66%

16:48

23:27

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

Sun - Rise: 06:04, Set: 20:17, Transit: 13:10. Moon - Rise: 16:48, Set: 23:27. Civil Dark: 20:53 - 05:28. Nautical Dark: 21:39 - 04:43. Astro Dark: 22:32 - 03:50

Total Clouds (% Sky Obscured)

31
34
45
50
63
72
75
82
56
75
74
49
39
21
13
14
20
21
15
9
2
0
3
13

Low Clouds (% Sky Obscured)

23
34
45
50
37
43
59
62
50
66
71
31
7
3
9
9
13
15
12
7
2
0
2
9

Medium Clouds (% Sky Obscured)

16
30
32
38
40
57
61
57
22
47
29
26
31
19
2
2
2
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
18
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 (%)

1
1
2
31
24
24
23
23
10
4
8
8
11
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

16
16
15
14
14
15
15
14
14
15
14
13
13
12
12
12
11
11
11
10
10
10
11
12

Dew Point (°C)

10
8
6
4
3
2
1
1
3
3
3
5
7
9
11
11
10
10
10
9
9
8
7
5

Relative Humidity (%)

64
53
45
41
38
34
32
33
37
39
41
50
62
74
89
95
93
95
93
93
93
87
72
58

Pressure (mb)

1014
1014
1014
1015
1015
1015
1015
1015
1015
1015
1016
1017
1018
1019
1019
1020
1020
1020
1021
1021
1022
1022
1023
1023

Ozone (du)

347
344
343
344
346
348
352
354
356
358
358
359
359
358
358
358
358
357
354
355
356
357
357
357

Saturday 22

Waxing Gibbous 75%

17:43

00:18

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

Sun - Rise: 06:06, Set: 20:15, Transit: 13:09. Moon - Rise: 17:43, Set: 00:18. Civil Dark: 20:51 - 05:30. Nautical Dark: 21:36 - 04:45. Astro Dark: 22:29 - 03:53

Total Clouds (% Sky Obscured)

18
38
17
38
44
65
72
50
54
63
56
57
32
12
5
2
2
0
3
0
0
0
0
0

Low Clouds (% Sky Obscured)

15
29
16
36
40
55
55
40
40
40
40
40
21
10
5
2
2
0
2
0
0
0
0
0

Medium Clouds (% Sky Obscured)

0
0
0
0
16
16
15
8
9
14
11
15
10
5
0
0
0
0
0
0
0
0
0
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
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

4
4
4
4
3
2
2
2
3
4
4
6
6
6
7
7
8
7
8
8
8
6
5
6

Relative Humidity (%)

50
45
41
38
34
31
30
30
33
36
40
48
52
56
59
62
69
73
80
83
84
78
65
55

Pressure (mb)

1024
1024
1024
1023
1023
1023
1023
1023
1023
1023
1024
1024
1025
1025
1025
1025
1025
1025
1026
1026
1026
1026
1026
1026

Ozone (du)

358
359
360
359
359
360
361
361
361
362
362
361
361
361
362
360
356
356
357
357
355
350
349
348

Sunday 23

Waxing Gibbous 83%

18:25

01:21

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

Sun - Rise: 06:07, Set: 20:13, Transit: 13:09. Moon - Rise: 18:25, Set: 01:21. Civil Dark: 20:49 - 05:31. Nautical Dark: 21:34 - 04:47. Astro Dark: 22:25 - 03:55

Total Clouds (% Sky Obscured)

0
34
54
55
33
36
34
62
52
31
36
29
19
4
0
3
22
30
59
66
43
59
80
100

Low Clouds (% Sky Obscured)

0
0
18
0
0
13
3
2
8
18
14
13
11
2
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

0
21
25
26
14
13
15
30
23
16
18
14
0
0
0
0
0
0
0
0
0
0
0
3

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
2
2
0
1
0
0
2
17
21
50
66
31
54
77
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 (%)

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)

2
1
1
1
2
2
3
3
4
5
5
4
4
4
3
3
3
3
3
4
4
4
8
11

Chance of Frost

Temperature (°C)

17
19
20
21
22
22
22
22
22
21
20
17
15
14
13
13
12
12
11
11
10
11
13
16

Feels Like (°C)

19
21
21
22
22
23
23
22
22
21
19
17
15
14
14
13
13
11
10
9
10
9
10
12

Dew Point (°C)

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

Relative Humidity (%)

47
40
35
30
28
27
25
26
26
29
35
45
67
76
80
81
83
81
79
74
74
71
62
53

Pressure (mb)

1026
1026
1026
1025
1025
1024
1024
1023
1023
1023
1023
1024
1024
1024
1024
1024
1024
1023
1023
1023
1023
1023
1022
1022

Ozone (du)

347
347
346
345
344
342
341
340
339
338
338
337
336
336
338
340
339
338
336
335
331
329
325
321

Monday 24

Waxing Gibbous 90%

18:56

02:33

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
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad

Sun - Rise: 06:09, Set: 20:10, Transit: 13:09. Moon - Rise: 18:56, Set: 02:33. Civil Dark: 20:46 - 05:33. Nautical Dark: 21:31 - 04:49. Astro Dark: 22:22 - 03:58

Total Clouds (% Sky Obscured)

99
97
96
97
98
100
96
93
90
92
96
100
100
100
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

7
13
20
21
19
17
10
5
0
3
6
9
14
16
22
67
74
67
43
48
31
45
52
87

Medium Clouds (% Sky Obscured)

3
16
64
46
79
100
89
66
8
65
29
32
27
20
69
79
90
100
100
100
96
94
88
82

High Clouds (% Sky Obscured)

96
92
90
93
97
100
94
88
85
87
94
100
100
100
100
100
100
100
100
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
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
Very Light Rain

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
2
0
8
11
15
17
18
23
33
37
45

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
0.2

Wind Speed/Direction (mph)

13
14
15
16
16
16
16
17
16
15
14
13
12
13
14
14
13
12
12
12
11
10
11
12

Chance of Frost

Temperature (°C)

18
19
20
21
22
22
22
22
21
20
18
17
16
15
15
15
15
15
15
15
15
15
16
17

Feels Like (°C)

13
14
15
16
16
17
17
16
16
15
14
13
12
11
11
11
11
12
12
12
12
13
14
15

Dew Point (°C)

6
5
5
4
2
1
2
3
5
8
9
10
10
10
11
11
11
12
12
12
12
12
12
12

Relative Humidity (%)

46
39
36
31
27
25
26
29
36
45
54
63
67
73
79
80
80
80
80
79
79
82
74
70

Pressure (mb)

1021
1021
1020
1019
1019
1018
1017
1016
1016
1016
1016
1016
1015
1015
1014
1014
1013
1013
1012
1012
1012
1012
1011
1011

Ozone (du)

320
321
323
324
322
323
322
322
321
320
319
319
321
318
319
321
321
322
321
320
320
320
319
319

Tuesday 25

Waxing Gibbous 95%

19:19

03:49

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

Sun - Rise: 06:11, Set: 20:08, Transit: 13:09. Moon - Rise: 19:19, Set: 03:49. Civil Dark: 20:44 - 05:35. Nautical Dark: 21:29 - 04:51. Astro Dark: 22:19 - 04:01

Total Clouds (% Sky Obscured)

92
83
73
63
54
40
60
77
95
60
30
3
26
48
75
70
66
68
72
74
75
77
80
83

Low Clouds (% Sky Obscured)

82
83
73
63
33
20
19
17
16
11
5
0
5
25
31
38
45
54
39
22
6
7
10
13

Medium Clouds (% Sky Obscured)

82
78
73
63
54
0
0
0
0
0
0
3
12
14
16
28
45
64
60
53
46
56
68
80

High Clouds (% Sky Obscured)

79
60
31
24
5
7
43
59
80
53
27
3
10
8
35
43
50
61
63
47
40
32
25
18

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 (%)

35
36
28
7
7
0
0
0
0
0
0
0
2
4
1
9
11
10
16
17
13
11
7
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)

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

Chance of Frost

Temperature (°C)

18
20
20
21
22
23
25
24
24
24
21
19
18
17
16
16
16
16
16
16
16
16
17
19

Feels Like (°C)

16
17
18
20
21
22
24
23
24
24
22
20
19
18
17
16
16
15
15
16
16
16
16
16

Dew Point (°C)

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

Relative Humidity (%)

62
56
61
61
59
47
40
39
39
42
54
68
76
81
85
86
87
87
90
93
93
96
82
70

Pressure (mb)

1011
1011
1011
1011
1010
1010
1009
1009
1009
1009
1010
1010
1011
1011
1011
1011
1011
1011
1011
1011
1011
1011
1011
1011

Ozone (du)

321
318
317
314
313
314
315
315
313
312
312
312
311
311
311
309
309
309
308
308
308
309
310
311

Wednesday 26

Waxing Gibbous 99%

19:37

05:05

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
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad

Sun - Rise: 06:12, Set: 20:06, Transit: 13:08. Moon - Rise: 19:37, Set: 05:05. Civil Dark: 20:42 - 05:37. Nautical Dark: 21:26 - 04:53. Astro Dark: 22:16 - 04:03

Total Clouds (% Sky Obscured)

89
94
99
99
100
100
91
82
75
64
57
49
58
63
64
75
88
98
98
99
99
100
100
100

Low Clouds (% Sky Obscured)

29
45
59
70
78
90
67
45
24
21
21
28
30
33
37
43
50
58
61
59
59
58
54
51

Medium Clouds (% Sky Obscured)

77
69
64
76
87
98
88
80
72
59
44
20
21
21
22
41
62
85
75
60
47
63
79
91

High Clouds (% Sky Obscured)

44
71
94
95
97
100
77
55
32
32
35
33
54
63
64
75
84
89
93
97
99
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
9
9
9
9
7
5

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

Precipitation Probability (%)

4
7
10
38
48
53
41
28
14
20
24
27
26
24
21
49
68
81
77
81
84
95
95
95

Precipitation Amount (mm)

0
0
0
0
0
0.2
0
0
0
0
0
0
0
0
0
0
0.4
0.6
0.4
0.4
0.3
0.8
0.8
1.4

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

20
21
21
22
21
21
20
20
20
20
19
18
17
17
16
16
16
16
16
16
16
17
17
18

Feels Like (°C)

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

Dew Point (°C)

12
13
14
15
16
17
18
18
17
16
16
16
16
16
16
16
16
16
15
16
16
16
17
17

Relative Humidity (%)

60
62
64
64
71
79
86
86
84
81
85
90
95
95
95
96
96
96
96
96
96
95
96
96

Pressure (mb)

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

Ozone (du)

312
313
314
315
317
319
321
323
326
328
329
330
332
332
332
333
332
332
331
328
326
323
323
322

Thursday 27

Waxing Gibbous 100%

19:51

06:22

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
04 Bad
05 Bad
06 Bad

Sun - Rise: 06:14, Set: 20:04, Transit: 13:08. Moon - Rise: 19:51, Set: 06:22. Civil Dark: 20:39 - 05:38. Nautical Dark: 21:23 - 04:55. Astro Dark: 22:13 - 04:06

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
95
92
86
91
95
99
98
98
97
98
99
100

Low Clouds (% Sky Obscured)

65
79
93
89
85
81
71
61
51
59
67
75
67
50
46
44
43
47
44
37
33

Medium Clouds (% Sky Obscured)

93
95
99
93
87
81
68
56
50
50
55
55
72
84
97
94
92
89
94
96
99

High Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
95
87
80
77
74
68
57
44
30
50
72
100

ISS Passover

Visibility (miles)

2
2
2
2
2
2
2
4
6
8
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

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

Precipitation Probability (%)

95
95
95
95
95
95
95
95
88
83
63
38
31
22
5
7
6
3
7
7
2

Precipitation Amount (mm)

1.6
2
2.6
3.1
3.7
4.1
1.6
0.9
0.3
0.3
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

18
18
18
19
17
16
16
15
14
13
15
15
14
14
14
14
14
13
12
12
12

Dew Point (°C)

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

Relative Humidity (%)

96
96
95
96
95
95
93
92
90
89
90
90
90
92
92
92
93
92
92
92
92

Pressure (mb)

1003
1002
1002
1001
1001
1000
1000
1001
1001
1002
1002
1003
1003
1003
1003
1004
1003
1003
1003
1004
1004

Ozone (du)

322
322
323
323
324
326
327
328
330
332
332
332
332
332
332
332
332
332
332
331
331

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

Generated: 21/08/26 10:59:04. Forecast: 21/08/26 to 27/08/26. Timezone: UTC+1.00