Clear Outside v1.0 - International Weather Forecasts For Astronomers

Thursday 27

Waxing Gibbous 100%

19:45

No Set

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
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 OK

Sun - Rise: 06:05, Set: 19:58, Transit: 13:02. Moon - Rise: 19:45, Set: No Set. Civil Dark: 20:34 - 05:31. Nautical Dark: 21:18 - 04:47. Astro Dark: 22:08 - 03:58

Total Clouds (% Sky Obscured)

22
39
53
62
100
100
100
100
88
100
100
99
100
100
100
100
100
98
96
99
89
87
97
35

Low Clouds (% Sky Obscured)

22
39
53
62
70
71
68
35
64
78
59
57
32
67
60
11
29
22
18
22
33
27
35
28

Medium Clouds (% Sky Obscured)

22
39
53
62
93
96
90
23
38
84
72
7
3
76
95
95
100
88
70
12
0
0
0
0

High Clouds (% Sky Obscured)

22
39
53
62
100
100
99
100
51
100
100
98
100
100
100
100
100
75
83
94
40
41
81
26

ISS Passover

Visibility (miles)

2
5
2
2
3
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

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

Precipitation Probability (%)

95
95
95
95
95
76
95
95
95
95
51
38
33
72
43
2
6
8
4
1
0
0
0
0

Precipitation Amount (mm)

0.6
0.9
1.9
2
0.4
0
2.3
0.8
2.7
1.4
0
0
0
0.5
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

5
4
5
7
9
5
6
6
9
10
7
8
8
7
6
6
5
6
8
9
8
8
9
9

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

19
19
19
20
20
22
23
22
22
20
20
21
20
19
17
17
16
16
15
14
14
13
14
13

Dew Point (°C)

17
17
18
19
20
20
20
19
17
13
13
12
12
13
13
13
12
13
13
12
12
12
13
13

Relative Humidity (%)

92
95
95
95
93
91
83
86
69
60
63
54
54
60
64
68
69
71
74
78
82
84
89
90

Pressure (mb)

1009
1009
1009
1009
1009
1009
1008
1008
1008
1007
1007
1007
1007
1007
1007
1007
1007
1007
1007
1007
1007
1007
1006
1006

Ozone (du)

314
315
312
314
318
325
327
329
332
333
338
339
339
333
336
338
340
339
341
342
342
342
342
344

Friday 28

Full Moon 99%

19:57

06:15

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

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

Total Clouds (% Sky Obscured)

29
32
43
44
45
95
100
100
100
100
100
100
100
98
93
84
83
65
34
39
47
89
88
93

Low Clouds (% Sky Obscured)

29
32
43
35
33
23
26
39
40
35
38
94
100
81
82
70
83
59
15
22
36
59
88
89

Medium Clouds (% Sky Obscured)

0
0
0
0
0
10
13
100
100
100
100
100
72
29
34
15
7
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

29
15
32
37
45
93
100
100
100
100
60
63
2
60
42
28
0
0
0
0
1
32
37
75

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
6
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

0
0
2
1
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
Light Rain
Very Light Rain
Light Rain
Light Rain
Light Rain
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

0
0
0
1
1
4
17
27
68
54
83
95
95
16
3
3
8
0
0
0
0
0
0
2

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0.7
0.2
0.6
1
1.1
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

10
9
11
13
14
15
16
16
17
16
15
16
16
15
12
11
10
10
10
10
10
10
10
11

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

89
87
77
68
61
53
46
41
39
42
42
50
60
65
76
81
82
81
83
89
90
95
96
89

Pressure (mb)

1006
1006
1006
1006
1006
1006
1005
1005
1005
1005
1005
1005
1005
1005
1006
1006
1006
1007
1007
1007
1007
1007
1007
1007

Ozone (du)

345
346
345
344
344
342
341
340
338
337
338
334
329
328
326
325
323
321
317
314
310
308
305
302

Saturday 29

Waning Gibbous 96%

20:08

07:32

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
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad

Sun - Rise: 06:09, Set: 19:54, Transit: 13:01. Moon - Rise: 20:08, Set: 07:32. 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
98
100
89
95
78
95
100
100
65
46
76
72
88
87
88
88
81
56

Low Clouds (% Sky Obscured)

89
76
54
78
90
92
91
85
70
67
47
88
91
96
51
36
52
59
71
72
71
69
67
43

Medium Clouds (% Sky Obscured)

76
99
100
100
100
49
26
24
78
21
25
34
30
35
29
9
23
13
15
15
12
13
7
3

High Clouds (% Sky Obscured)

100
92
100
100
65
75
9
88
33
95
78
86
85
0
0
0
0
2
0
4
6
10
10
13

ISS Passover

Visibility (miles)

9
9
9
9
5
9
9
9
9
5
5
7
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
Light Rain
Light Rain
Light Rain
Light Rain
None
Very Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Very Light Rain
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

2
9
23
45
95
95
95
95
61
47
95
95
95
95
38
3
4
2
7
2
4
1
0
0

Precipitation Amount (mm)

0
0
0
0
0.8
1.5
1.2
2
0
0.2
0.6
2.1
1.7
1.4
0.3
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

16
16
16
17
17
17
17
17
18
20
20
20
18
18
18
18
17
17
17
17
17
16
16
15

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

85
85
83
82
88
92
88
90
89
81
75
75
79
79
75
81
85
83
85
82
81
82
79
83

Pressure (mb)

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

Ozone (du)

301
299
299
303
303
308
308
306
305
309
307
306
307
308
308
308
310
310
309
309
308
309
308
307

Sunday 30

Waning Gibbous 91%

20:19

08:51

06 OK
07 Bad
08 Bad
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

Sun - Rise: 06:10, Set: 19:51, Transit: 13:01. Moon - Rise: 20:19, Set: 08:51. Civil Dark: 20:27 - 05:37. Nautical Dark: 21:10 - 04:53. Astro Dark: 21:59 - 04:05

Total Clouds (% Sky Obscured)

32
42
86
97
97
99
100
100
100
100
100
100
97
91
100
100
91
82
74
81
91
100
86
85

Low Clouds (% Sky Obscured)

26
25
43
52
29
10
2
23
65
71
71
71
35
31
27
22
23
25
26
29
53
91
40
35

Medium Clouds (% Sky Obscured)

0
5
6
20
92
96
84
99
99
98
82
19
29
29
26
29
27
23
41
70
77
100
22
10

High Clouds (% Sky Obscured)

7
28
62
83
90
94
100
100
96
76
91
86
94
87
100
100
82
67
50
63
85
100
71
53

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
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
Very Light Rain
None
None
None

Precipitation Probability (%)

0
0
0
0
0
0
2
3
7
13
24
21
31
39
40
13
10
13
29
53
65
45
6
8

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

87
89
85
78
71
62
56
51
48
50
57
57
50
59
66
72
77
81
83
83
83
89
86
87

Pressure (mb)

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

Ozone (du)

308
309
309
308
309
310
311
312
315
316
321
326
327
326
326
326
326
327
328
328
328
329
329
328

Monday 31

Waning Gibbous 83%

20:32

10:11

06 Bad
07 Bad
08 OK
09 OK
10 OK
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

Sun - Rise: 06:12, 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)

78
33
28
23
25
51
61
59
78
77
82
85
78
65
68
71
78
84
92
91
90
88
85
82

Low Clouds (% Sky Obscured)

32
30
28
23
25
48
56
42
36
65
50
7
19
21
17
13
11
9
5
16
27
36
47
60

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
2
3
5
72
9
11
6
6
28
51
74
82
89
88
85
82

High Clouds (% Sky Obscured)

29
0
0
0
0
1
1
2
21
22
48
59
63
35
33
39
48
61
70
65
60
50
30
20

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
0
0
0
0
12
0
0
0
1
4
3
10
11
8
11
8
1
3
2
0
5
5

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

89
92
86
78
71
65
59
52
46
45
46
43
44
52
58
65
73
75
78
80
79
75
74
72

Pressure (mb)

1007
1007
1008
1008
1009
1010
1010
1010
1011
1011
1011
1012
1012
1013
1013
1014
1014
1015
1015
1015
1015
1015
1015
1015

Ozone (du)

327
328
327
326
325
323
321
318
317
316
315
315
315
314
313
312
312
313
314
316
317
319
320
321

Tuesday 1

Waning Gibbous 74%

20:49

11:35

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
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad

Sun - Rise: 06:13, 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)

82
84
88
90
87
84
82
86
90
93
83
77
72
74
77
77
87
93
100
91
82
81
85
85

Low Clouds (% Sky Obscured)

74
81
85
90
84
75
68
79
89
93
83
72
60
51
43
36
44
52
60
46
31
19
20
18

Medium Clouds (% Sky Obscured)

82
62
42
19
16
13
10
9
11
10
10
8
5
3
1
0
0
1
1
7
16
28
27
26

High Clouds (% Sky Obscured)

15
10
5
0
23
40
60
43
22
0
0
0
0
19
39
49
69
86
100
78
57
36
53
68

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
1
0
2
3
4
10
13
16
30
39
47
47
37
20
16
13
1
5
6
9
25
36

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

Chance of Frost

Temperature (°C)

13
13
15
16
18
19
20
21
21
21
21
20
20
19
18
17
17
16
16
16
15
15
15
15

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

72
71
68
65
62
56
51
47
49
50
52
57
61
67
70
73
75
75
73
73
77
79
82
83

Pressure (mb)

1015
1015
1016
1016
1016
1016
1015
1015
1015
1015
1015
1015
1015
1015
1015
1015
1016
1016
1016
1016
1016
1016
1016
1016

Ozone (du)

322
322
322
322
322
323
323
324
324
324
325
326
328
330
330
330
330
331
332
333
332
331
330
327

Wednesday 2

Waning Gibbous 63%

21:11

13:02

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
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad

Sun - Rise: 06:15, 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)

85
89
88
88
74
62
51
59
65
71
74
77
77
80
84
84
89
94
96

Low Clouds (% Sky Obscured)

19
25
31
38
35
34
26
26
20
19
17
17
15
10
5
0
17
34
50

Medium Clouds (% Sky Obscured)

25
21
13
8
4
2
0
1
2
2
11
21
28
20
13
10
22
35
47

High Clouds (% Sky Obscured)

80
57
33
10
13
12
14
20
23
29
25
25
25
48
69
84
87
85
86

ISS Passover

Visibility (miles)

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

Precipitation Type

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

Precipitation Probability (%)

49
56
58
50
45
28
11
9
3
0
0
0
0
0
0
0
0
0
0

Precipitation Amount (mm)

0
0.2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

85
83
75
67
61
54
47
42
41
39
38
40
43
45
48
50
52
56
60

Pressure (mb)

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

Ozone (du)

325
322
319
317
314
312
310
308
306
304
301
300
299
298
297
296
295
296
296

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

Generated: 27/08/26 06:51:53. Forecast: 27/08/26 to 02/09/26. Timezone: UTC+1.00