Clear Outside v1.0 - International Weather Forecasts For Astronomers

Saturday 29

Waning Gibbous 96%

20:08

08:51

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
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad

Sun - Rise: 06:10, Set: 19:54, Transit: 13:01. Moon - Rise: 20:08, Set: 08:51. Civil Dark: 20:29 - 05:35. Nautical Dark: 21:13 - 04:51. Astro Dark: 22:02 - 04:03

Total Clouds (% Sky Obscured)

58
68
75
80
100
99
100
100
100
98
84
94
66
61
87
89
97
60
82
79
78
82
92
93

Low Clouds (% Sky Obscured)

58
68
75
80
93
77
90
90
100
84
49
46
59
61
87
89
92
60
80
76
75
76
83
91

Medium Clouds (% Sky Obscured)

58
68
75
30
71
91
100
100
99
39
4
25
17
24
35
29
27
0
0
0
1
0
0
0

High Clouds (% Sky Obscured)

58
68
25
6
59
64
100
27
45
74
62
52
0
0
0
3
0
0
0
2
8
21
35
39

ISS Passover

Visibility (miles)

9
5
7
9
9
7
3
4
8
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
Very Light Rain
Very Light Rain
None
Light Rain
Light Rain
Light Rain
Moderate Rain
None
None
None
None
None
Very Light Rain
Light Rain
None
None
None
None
None
None
None
None

Precipitation Probability (%)

95
95
95
70
55
95
95
95
95
57
21
7
7
17
36
44
5
1
1
0
0
0
0
0

Precipitation Amount (mm)

0.4
0.6
0.2
0.2
0
0.9
2
1.7
2.7
0
0
0
0
0
0.2
0.4
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

6
8
10
8
14
14
16
15
13
11
12
12
10
9
9
9
10
10
9
10
8
7
8
9

Chance of Frost

Temperature (°C)

17
17
17
17
17
18
19
19
18
18
19
18
18
18
17
17
17
17
16
16
15
14
15
15

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

77
85
86
89
90
90
78
85
90
93
89
89
92
93
95
90
90
90
93
90
92
93
86
83

Pressure (mb)

1007
1006
1005
1005
1004
1003
1002
1001
1000
999
1000
1001
1002
1003
1004
1005
1006
1007
1007
1008
1008
1009
1009
1010

Ozone (du)

303
303
306
311
314
312
317
320
314
315
312
308
308
308
308
307
309
311
312
313
312
311
311
312

Sunday 30

Waning Gibbous 91%

20:19

No Set

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
04 OK
05 OK
06 Bad
07 Bad
08 Bad

Sun - Rise: 06:12, Set: 19:51, Transit: 13:01. Moon - Rise: 20:19, Set: No Set. Civil Dark: 20:27 - 05:37. Nautical Dark: 21:10 - 04:53. Astro Dark: 21:59 - 04:05

Total Clouds (% Sky Obscured)

100
100
100
100
100
96
77
59
85
100
100
99
80
65
87
77
71
74
82
42
42
53
50
73

Low Clouds (% Sky Obscured)

81
31
32
59
64
76
57
50
56
31
42
59
48
42
45
33
68
72
82
25
23
40
45
73

Medium Clouds (% Sky Obscured)

0
0
9
26
13
6
11
8
7
36
54
4
0
0
14
58
0
6
8
0
1
6
1
1

High Clouds (% Sky Obscured)

100
100
100
100
100
60
43
45
45
100
100
95
29
60
38
30
19
4
14
1
0
0
1
0

ISS Passover

Visibility (miles)

9
9
9
9
8
9
9
9
9
9
9
8
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
0
0
0

Precipitation Type

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

Precipitation Probability (%)

0
2
13
66
59
45
41
45
70
64
48
72
24
21
32
15
7
9
5
1
0
0
0
0

Precipitation Amount (mm)

0
0
0
0.6
0.3
0
0
0
0.4
0.3
0
0.5
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

17
18
19
21
21
21
21
21
21
20
18
17
17
16
16
16
15
15
15
15
14
14
14
15

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

79
73
67
60
65
58
52
44
46
54
60
65
77
81
85
83
90
87
86
82
87
90
89
84

Pressure (mb)

1010
1010
1010
1009
1009
1008
1008
1007
1007
1007
1006
1006
1006
1006
1006
1005
1005
1005
1005
1005
1006
1007
1007
1008

Ozone (du)

311
311
311
311
313
315
318
318
319
325
327
325
327
327
330
332
336
334
331
329
329
330
331
332

Monday 31

Waning Gibbous 83%

20:32

10:11

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 OK
03 OK
04 OK
05 Bad
06 Bad
07 Bad
08 Bad

Sun - Rise: 06:13, Set: 19:49, Transit: 13:01. Moon - Rise: 20:32, Set: 10:11. Civil Dark: 20:24 - 05:38. Nautical Dark: 21:08 - 04:55. Astro Dark: 21:56 - 04:08

Total Clouds (% Sky Obscured)

85
93
57
81
95
79
80
74
100
100
100
100
100
100
100
94
85
40
33
44
67
58
56
56

Low Clouds (% Sky Obscured)

85
90
44
71
81
79
78
63
38
29
17
18
15
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

1
9
12
11
12
1
0
0
4
5
8
67
44
24
96
87
74
37
16
27
59
52
22
20

High Clouds (% Sky Obscured)

0
0
0
0
0
22
40
37
100
100
100
100
99
100
100
37
24
1
2
2
20
40
40
40

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

Precipitation Probability (%)

0
1
15
26
43
22
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
0.2
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
14
16
16
16
14
15
13
12
11
10
9
8
7
6
5
5
5
5
4
4
4
5

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

78
79
78
65
62
55
58
53
50
50
53
57
60
63
66
68
70
71
73
75
76
76
75
72

Pressure (mb)

1009
1010
1010
1011
1012
1013
1014
1014
1014
1015
1015
1016
1017
1018
1018
1019
1019
1019
1019
1019
1019
1019
1019
1020

Ozone (du)

331
331
330
327
324
321
317
316
315
313
311
311
311
311
311
312
312
311
312
310
311
310
311
312

Tuesday 1

Waning Gibbous 74%

20:49

11:35

09 Bad
10 Bad
11 OK
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

Sun - Rise: 06:15, Set: 19:47, Transit: 13:00. Moon - Rise: 20:49, Set: 11:35. Civil Dark: 20:22 - 05:40. Nautical Dark: 21:05 - 04:57. Astro Dark: 21:53 - 04:10

Total Clouds (% Sky Obscured)

57
52
42
57
73
96
99
93
87
80
86
92
100
86
95
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

0
8
16
29
46
57
54
49
70
16
37
7
3
6
11
15
24
34
64
72
34
85
86
83

Medium Clouds (% Sky Obscured)

11
12
13
15
16
13
13
11
13
22
13
16
22
23
18
24
28
27
94
88
83
100
97
94

High Clouds (% Sky Obscured)

45
18
2
0
1
15
15
30
36
46
64
82
100
75
91
100
100
100
100
100
99
100
99
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
6

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
Light Rain
Light Rain

Precipitation Probability (%)

0
0
0
0
1
2
1
9
12
11
12
9
0
0
0
0
15
27
36
33
27
24
72
95

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
0.4
1

Wind Speed/Direction (mph)

7
8
9
10
11
11
11
11
12
9
8
8
7
7
8
7
7
8
8
8
8
9
10
10

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

69
64
59
53
47
43
40
40
47
48
51
54
61
66
74
82
86
86
86
86
87
90
87
89

Pressure (mb)

1020
1020
1020
1019
1019
1019
1018
1018
1018
1018
1018
1018
1018
1019
1019
1019
1018
1018
1018
1017
1017
1017
1017
1017

Ozone (du)

313
314
315
314
310
309
308
308
309
312
315
316
315
317
314
313
313
314
315
314
313
313
309
308

Wednesday 2

Waning Gibbous 63%

21:11

13:02

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
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad

Sun - Rise: 06:17, Set: 19:45, Transit: 13:00. Moon - Rise: 21:11, Set: 13:02. Civil Dark: 20:20 - 05:42. Nautical Dark: 21:02 - 04:59. Astro Dark: 21:50 - 04:13

Total Clouds (% Sky Obscured)

100
100
100
100
99
100
98
93
93
86
86
90
92
94
90
93
93
92
93
95
96
100
98
96

Low Clouds (% Sky Obscured)

81
84
87
91
86
97
90
74
60
43
50
40
37
27
25
20
28
36
44
55
68
81
66
51

Medium Clouds (% Sky Obscured)

94
96
99
67
10
11
10
10
92
54
86
90
92
94
23
29
39
53
62
65
63
76
90
92

High Clouds (% Sky Obscured)

100
100
100
100
80
41
51
37
31
22
4
6
9
47
61
81
75
67
62
75
86
96
75
54

ISS Passover

Visibility (miles)

4
8
4
8
9
5
9
5
6
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
None
Light Rain
Light Rain
Light Rain
Light Rain
Very Light Rain
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

95
93
95
61
77
80
85
80
55
29
28
24
20
9
6
7
14
9
0
5
10
8
16
18

Precipitation Amount (mm)

0.6
0.7
1.1
0
0.4
0.4
0.6
0.6
0.3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

16
17
17
17
18
18
19
19
19
19
19
19
18
18
18
17
17
17
16
16
16
16
16
17

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

86
85
86
89
88
80
77
73
75
76
81
86
89
86
86
89
89
89
90
92
92
90
90
83

Pressure (mb)

1017
1016
1016
1016
1015
1015
1014
1013
1013
1013
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012

Ozone (du)

306
302
301
299
296
294
292
292
293
293
292
291
290
290
290
290
291
291
291
291
292
293
294
296

Thursday 3

Waning Gibbous 51%

21:43

14:28

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

Sun - Rise: 06:18, Set: 19:42, Transit: 13:00. Moon - Rise: 21:43, Set: 14:28. Civil Dark: 20:17 - 05:44. Nautical Dark: 21:00 - 05:01. Astro Dark: 21:47 - 04:15

Total Clouds (% Sky Obscured)

95
73
53
31
43
54
66
52
39
30
27
23
16
18
19
20
20
28
33
30
27
21
25
28

Low Clouds (% Sky Obscured)

35
26
16
7
7
6
6
11
16
21
13
6
0
0
0
0
4
9
13
9
6
2
5
10

Medium Clouds (% Sky Obscured)

94
66
33
0
0
0
0
0
0
0
1
2
9
11
13
18
18
18
18
13
12
9
11
13

High Clouds (% Sky Obscured)

37
26
20
13
29
39
36
24
17
11
13
12
11
7
3
0
0
1
2
1
1
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 (%)

20
19
15
4
6
2
0
1
2
2
4
3
1
1
0
0
1
1
0
0
1
0
2
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)

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

Chance of Frost

Temperature (°C)

18
19
20
21
22
22
22
22
21
20
19
18
17
16
15
15
14
14
14
14
14
14
14
15

Feels Like (°C)

14
14
15
15
16
21
19
18
18
18
19
15
15
15
15
15
14
12
12
12
12
12
12
11

Dew Point (°C)

14
14
12
10
9
9
9
9
9
10
11
11
11
11
11
12
12
11
11
10
10
11
11
10

Relative Humidity (%)

78
72
60
51
43
42
42
42
46
51
56
61
66
73
77
80
84
83
82
79
79
80
80
73

Pressure (mb)

1012
1012
1012
1012
1012
1012
1012
1012
1012
1013
1013
1013
1014
1014
1014
1014
1014
1014
1014
1014
1014
1013
1013
1013

Ozone (du)

297
298
300
302
304
307
309
312
315
318
321
322
324
325
326
327
328
331
334
337
339
341
344
342

Friday 4

Third Quarter 39%

22:30

15:48

09 OK
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: 06:20, Set: 19:40, Transit: 12:59. Moon - Rise: 22:30, Set: 15:48. Civil Dark: 20:15 - 05:45. Nautical Dark: 20:57 - 05:03. Astro Dark: 21:44 - 04:17

Total Clouds (% Sky Obscured)

28
47
66
85
86
87
88
78
68
60
82
90
95
94
95
95
91
83
74
66
51
44

Low Clouds (% Sky Obscured)

13
36
59
81
57
33
8
12
15
18
16
18
16
16
19
19
20
21
39
41
43
44

Medium Clouds (% Sky Obscured)

10
10
10
10
10
10
5
5
4
4
4
5
0
0
5
9
14
19
20
25
20
15

High Clouds (% Sky Obscured)

0
5
10
15
32
44
41
14
9
7
16
44
61
69
78
90
87
82
74
66
51
44

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

Fog (%)

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

Precipitation Probability (%)

16
53
69
81
95
95
95
95
75
31
39
38
41
60
71
82
81
77
71
60
52
45

Precipitation Amount (mm)

0
0.2
0.3
0.4
0.9
1.1
1.1
0.9
0.4
0
0
0
0
0
0.2
0.3
0.3
0.3
0.3
0.2
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

15
16
17
17
17
18
18
19
18
18
18
17
16
16
16
16
17
17
16
16
15
14

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

67
61
58
54
51
48
45
41
44
48
51
56
59
64
68
74
78
81
83
86
86
86

Pressure (mb)

1014
1014
1014
1013
1013
1013
1014
1014
1014
1014
1015
1015
1016
1016
1016
1017
1017
1017
1017
1017
1018
1018

Ozone (du)

340
339
335
332
328
325
322
320
317
315
312
310
308
307
305
304
302
302
301
300
300
299

Forecast for Welwyn Garden City, Hertfordshire, United Kingdom (51.80,-0.21)

Generated: 29/08/26 09:25:31. Forecast: 29/08/26 to 04/09/26. Timezone: UTC+1.00