Clear Outside v1.0 - International Weather Forecasts For Astronomers

Friday 28

Full Moon 99%

19:57

07:32

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

Sun - Rise: 06:09, Set: 19:56, Transit: 13:01. Moon - Rise: 19:57, Set: 07:32. Civil Dark: 20:31 - 05:33. Nautical Dark: 21:15 - 04:49. Astro Dark: 22:05 - 04:00

Total Clouds (% Sky Obscured)

32
35
38
34
66
100
99
99
82
85
92
92
73
33
43
41
79
86
92
90
96
100
100
100

Low Clouds (% Sky Obscured)

28
34
18
24
42
55
25
22
16
31
64
57
7
21
42
41
67
79
89
86
82
87
47
34

Medium Clouds (% Sky Obscured)

0
0
20
15
13
11
63
49
82
85
92
92
73
15
17
2
3
0
0
0
6
25
61
95

High Clouds (% Sky Obscured)

32
35
19
7
30
100
96
95
45
44
2
2
1
3
0
0
0
0
7
42
79
100
100
85

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
3
5
7
14
14
11
14
11
27
8
3
0
0
0
0
0
0
0
11
0
0
1
7

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)

10
11
12
14
15
17
18
18
17
15
12
12
12
12
10
9
9
9
9
10
9
9
9
11

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

12
12
11
10
9
9
10
9
9
11
12
11
11
12
12
12
13
13
13
13
13
12
12
13

Relative Humidity (%)

73
64
55
47
43
41
45
42
44
51
56
57
60
69
74
75
85
82
81
81
82
80
80
78

Pressure (mb)

1006
1006
1006
1006
1006
1006
1006
1006
1005
1006
1006
1006
1007
1007
1008
1008
1007
1007
1007
1007
1007
1007
1007
1007

Ozone (du)

347
346
346
347
344
341
337
335
333
331
329
325
323
321
321
320
315
311
308
306
305
304
302
302

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)

100
100
100
100
100
100
100
100
99
100
99
76
64
66
73
69
64
57
72
83
50
65
71
69

Low Clouds (% Sky Obscured)

30
86
93
100
94
81
81
89
85
95
98
47
54
58
49
45
48
30
72
83
41
65
55
69

Medium Clouds (% Sky Obscured)

100
100
99
52
31
100
100
100
84
38
31
21
20
4
23
30
35
12
0
0
0
0
0
1

High Clouds (% Sky Obscured)

100
100
100
100
49
100
45
100
50
40
2
18
2
0
3
1
0
0
0
0
2
16
21
27

ISS Passover

Visibility (miles)

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

Precipitation Type

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

Precipitation Probability (%)

45
95
73
45
36
74
95
95
95
95
95
14
4
1
8
8
16
4
0
1
0
0
0
0

Precipitation Amount (mm)

0
0.7
0.4
0
0
0.5
1.1
1.9
1.3
4.7
0.6
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

72
76
85
86
88
92
77
88
88
89
90
93
93
95
93
95
93
92
93
90
85
87
87
90

Pressure (mb)

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

Ozone (du)

302
303
303
311
308
308
314
314
317
315
312
308
307
306
306
306
307
309
310
310
309
309
310
309

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 Bad
05 Bad
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)

95
99
100
100
100
100
100
92
90
100
100
100
99
100
82
100
77
83
92
61
99
100
83
70

Low Clouds (% Sky Obscured)

89
89
17
35
71
26
36
21
42
42
28
40
29
37
60
50
66
83
52
57
77
77
70
62

Medium Clouds (% Sky Obscured)

12
15
0
12
98
95
98
92
90
93
17
100
96
20
4
12
65
70
45
1
0
30
20
8

High Clouds (% Sky Obscured)

46
90
99
99
100
99
100
35
25
80
100
100
83
100
82
100
20
20
74
5
61
60
40
20

ISS Passover

Visibility (miles)

9
9
9
9
9
8
9
9
9
9
9
9
9
9
9
9
6
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
1
14
20
25
35
28
23
35
52
27
44
26
14
26
39
19
3
6
2
0
0
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

85
81
68
62
59
61
54
53
56
62
64
64
67
73
79
85
83
80
82
84
87
79
75
77

Pressure (mb)

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

Ozone (du)

309
309
309
309
309
310
312
315
320
324
326
325
326
327
329
331
334
335
338
339
338
338
334
333

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 OK
21 OK
22 Bad
23 Bad
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad

Sun - Rise: 06:13, 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)

45
48
73
76
79
82
87
88
91
93
72
42
38
54
76
91
91
92
93
86
81
74
71
70

Low Clouds (% Sky Obscured)

45
44
58
63
68
68
75
75
72
72
50
7
13
3
0
0
2
3
4
10
14
17
18
22

Medium Clouds (% Sky Obscured)

0
3
5
7
7
5
4
6
7
8
7
5
6
11
11
18
22
25
29
30
65
54
35
31

High Clouds (% Sky Obscured)

0
0
0
0
2
4
7
25
7
8
6
3
1
8
25
30
30
35
40
45
50
50
45
55

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 (%)

2
1
11
3
1
2
3
12
14
10
2
1
0
0
0
0
1
1
3
4
4
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)

14
15
16
16
16
16
16
16
14
12
12
10
9
8
7
7
6
6
6
6
5
5
5
6

Chance of Frost

Temperature (°C)

16
17
18
19
20
20
20
20
19
19
18
17
16
15
14
14
13
13
13
13
13
13
13
14

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

79
71
69
67
66
68
65
61
57
56
61
67
74
78
79
84
84
84
86
83
83
83
80
74

Pressure (mb)

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

Ozone (du)

333
333
334
333
329
325
322
318
316
315
315
315
314
314
314
314
316
316
317
318
318
318
318
318

Tuesday 1

Waning Gibbous 74%

20:49

11:35

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: 06:15, 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)

72
78
86
85
60
91
90
94
78
100
100
76
73
86
100
99
92
81
69
77
85
100
99
98

Low Clouds (% Sky Obscured)

27
30
33
36
24
25
52
61
44
77
75
16
0
4
8
14
17
20
23
28
35
44
50
54

Medium Clouds (% Sky Obscured)

55
62
32
12
17
56
77
53
6
5
73
9
10
41
87
73
63
54
46
53
40
20
30
56

High Clouds (% Sky Obscured)

50
40
30
20
3
35
30
41
55
84
100
76
73
77
75
84
76
63
56
67
74
85
84
84

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
Very Light Rain
Very Light Rain
Very Light Rain

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
1
4
1
0
0
0
0
0
0
24
42
61
60
57

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

14
16
17
18
19
20
19
18
18
18
18
17
16
16
15
13
13
13
13
13
14
14
14
14

Dew Point (°C)

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

Relative Humidity (%)

66
60
55
50
46
43
42
48
50
50
54
55
65
72
78
80
84
89
92
95
93
95
93
85

Pressure (mb)

1019
1019
1019
1019
1019
1019
1018
1018
1018
1018
1018
1018
1018
1019
1018
1018
1018
1018
1017
1017
1017
1016
1016
1016

Ozone (du)

319
321
322
322
322
322
323
324
323
323
323
326
324
326
326
326
326
324
323
322
321
321
320
320

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)

98
98
99
99
100
98
97
97
92
82
77
75
77
73
69
65
82
88
96
98
99
100
96
92

Low Clouds (% Sky Obscured)

60
69
79
88
76
64
53
54
55
56
63
70
76
73
69
65
82
88
96
84
68
52
36
22

Medium Clouds (% Sky Obscured)

81
59
35
12
20
29
38
56
74
82
77
73
56
60
64
64
57
51
44
39
37
31
33
34

High Clouds (% Sky Obscured)

83
73
61
50
75
75
55
45
40
45
30
30
30
35
40
55
55
70
85
90
90
90
90
90

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

Very 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 (%)

52
42
36
28
24
19
8
25
30
27
24
16
2
20
28
31
27
22
17
30
42
35
43
43

Precipitation Amount (mm)

0.2
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
16
14
13
13
13
14
14
14
13
13
12
11
11
11
11
12
11
11
12
12
13
14
14

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

14
14
15
15
16
20
20
20
21
21
21
16
16
15
14
14
13
12
13
12
13
13
14
14

Dew Point (°C)

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

Relative Humidity (%)

78
70
64
59
55
55
54
55
60
66
74
75
78
79
82
85
90
89
90
90
89
87
86
81

Pressure (mb)

1016
1016
1016
1016
1016
1015
1015
1015
1015
1015
1015
1015
1015
1015
1015
1015
1015
1015
1014
1014
1014
1014
1013
1014

Ozone (du)

319
318
316
314
312
311
309
308
306
304
303
302
300
299
299
298
297
296
294
293
292
291
289
288

Thursday 3

Waning Gibbous 51%

21:43

14:28

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

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)

90
79
67
56
68
79
90
87
84
78
70
72
78
85
89
94
91
88
87
88
92
94

Low Clouds (% Sky Obscured)

7
8
9
10
8
5
2
11
17
23
41
57
74
79
84
89
90
88
85
82
79
77

Medium Clouds (% Sky Obscured)

37
36
36
35
35
36
34
36
38
40
58
72
78
85
89
94
91
88
87
84
83
81

High Clouds (% Sky Obscured)

90
66
40
18
35
47
40
20
26
40
39
65
67
71
75
70
43
28
15
14
13
12

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

Precipitation Probability (%)

29
24
16
0
1
2
1
2
1
0
8
11
10
13
12
10
13
14
14
27
35
39

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

Wind Speed/Direction (mph)

15
16
17
18
19
19
19
19
18
18
17
16
15
15
13
12
10
9
8
7
7
8

Chance of Frost

Temperature (°C)

18
19
20
22
23
23
23
24
23
22
21
20
19
18
17
16
16
15
15
14
14
15

Feels Like (°C)

15
15
15
15
14
22
20
18
18
19
19
16
17
17
15
15
15
12
12
13
12
14

Dew Point (°C)

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

Relative Humidity (%)

74
69
59
52
45
46
46
47
53
58
65
70
75
79
82
83
83
84
84
84
86
86

Pressure (mb)

1014
1014
1014
1014
1014
1014
1014
1014
1015
1015
1015
1016
1017
1017
1018
1018
1018
1018
1019
1019
1019
1020

Ozone (du)

287
285
285
286
286
286
286
286
285
283
282
282
283
283
283
284
284
285
285
285
287
289

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

Generated: 28/08/26 09:32:42. Forecast: 28/08/26 to 03/09/26. Timezone: UTC+1.00