Clear Outside v1.0 - International Weather Forecasts For Astronomers

Sunday 30

Waning Gibbous 91%

20:19

No Set

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
06 Bad
07 Bad
08 OK

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)

20
32
48
65
100
95
94
95
100
53
100
100
87
45
48
73
89
100
73
100
71
43
70
35

Low Clouds (% Sky Obscured)

20
27
32
48
54
71
73
72
65
40
36
35
51
45
43
50
75
50
60
80
67
39
38
27

Medium Clouds (% Sky Obscured)

0
0
10
26
11
14
10
6
7
25
16
75
70
0
17
23
65
15
12
18
4
3
3
6

High Clouds (% Sky Obscured)

20
32
48
65
100
40
55
55
55
53
100
100
39
37
48
67
55
100
54
96
8
2
20
2

ISS Passover

Visibility (miles)

9
9
9
9
9
6
6
9
9
9
9
9
4
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
Very Light Rain
Very Light Rain
None
None
Light Rain
Light Rain
None
None
None
Very Light Rain
None
None
None
None
None
None
None
None

Precipitation Probability (%)

0
6
30
8
28
33
57
55
53
53
77
61
32
5
8
50
48
10
4
14
3
1
1
0

Precipitation Amount (mm)

0
0
0
0
0
0
0.2
0.2
0
0
0.4
0.4
0
0
0
0.2
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

15
13
11
11
10
11
10
9
8
10
9
9
11
12
13
13
12
12
13
13
11
11
12
12

Relative Humidity (%)

83
72
58
54
49
51
47
46
45
54
53
56
69
74
81
83
80
80
89
90
82
82
84
82

Pressure (mb)

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

Ozone (du)

313
314
314
314
315
317
319
320
319
324
331
330
331
330
331
334
336
337
338
337
337
336
336
338

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 Bad
03 Bad
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)

69
89
82
94
87
86
58
81
81
100
100
78
85
100
96
83
96
98
79
28
54
51
49
80

Low Clouds (% Sky Obscured)

66
85
69
77
72
77
46
75
49
39
7
5
8
0
0
0
0
0
0
0
0
0
0
6

Medium Clouds (% Sky Obscured)

3
13
19
29
18
5
9
0
0
26
4
18
15
77
89
62
79
97
79
28
19
19
12
14

High Clouds (% Sky Obscured)

2
0
0
0
0
0
5
55
65
100
100
60
68
100
85
71
69
93
14
1
2
1
10
25

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
5
6
4
8
14
13
15
2
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)

15
16
15
15
14
14
13
13
13
13
12
10
8
7
7
6
5
5
5
5
5
5
5
6

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

13
13
13
15
16
16
16
18
16
15
14
14
12
12
11
11
10
10
9
10
11
11
11
12

Dew Point (°C)

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

Relative Humidity (%)

74
72
70
67
67
65
67
55
61
57
61
62
65
64
64
66
67
70
70
72
75
76
76
74

Pressure (mb)

1008
1009
1010
1011
1012
1013
1014
1014
1014
1015
1016
1017
1018
1018
1019
1019
1019
1019
1019
1019
1020
1020
1020
1021

Ozone (du)

336
335
335
330
327
326
325
323
321
320
317
316
316
316
317
316
316
315
315
315
313
311
310
311

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)

75
80
73
76
45
47
59
83
100
88
72
88
99
100
98
97
91
73
76
79
94
99
97
100

Low Clouds (% Sky Obscured)

13
17
41
68
33
26
45
43
6
17
15
0
0
0
2
5
24
28
25
23
33
34
31
30

Medium Clouds (% Sky Obscured)

4
50
46
21
9
11
11
9
11
4
7
32
57
29
70
31
29
17
26
22
72
83
76
27

High Clouds (% Sky Obscured)

30
35
17
6
1
0
3
37
100
66
21
65
97
100
94
35
24
48
74
69
67
95
95
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
6
0
0
0
0
0
0
0
0
0
0
0
0
4
6

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

69
65
60
54
48
42
41
44
47
50
53
57
60
64
72
77
83
86
90
92
93
90
82
75

Pressure (mb)

1021
1021
1021
1021
1021
1020
1020
1020
1020
1020
1020
1020
1021
1021
1021
1021
1021
1021
1021
1021
1021
1021
1021
1021

Ozone (du)

312
312
314
316
319
317
317
315
315
316
318
319
320
317
314
310
308
305
303
301
299
297
297
296

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
99
92
78
87
97
97
98
98
99
99
100
98
95
93
89
93
94
95
95
96
97
98

Low Clouds (% Sky Obscured)

34
37
55
41
52
65
81
84
57
45
45
41
44
49
94
91
71
59
87
82
79
92
93
77

Medium Clouds (% Sky Obscured)

68
44
70
69
16
13
54
10
10
98
98
97
75
90
77
73
24
84
76
76
85
87
91
60

High Clouds (% Sky Obscured)

100
100
95
83
59
30
2
21
23
28
52
76
100
68
44
42
28
43
63
61
60
55
65
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
None
None
None

Precipitation Probability (%)

7
15
17
11
12
11
7
12
12
0
0
0
0
1
0
0
2
3
0
1
3
4
32
41

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

11
11
10
9
9
10
11
13
14
14
14
15
15
15
16
16
15
15
16
16
16
16
15
16

Relative Humidity (%)

69
66
57
52
49
52
53
61
68
68
71
76
81
83
86
86
85
85
89
89
86
86
85
85

Pressure (mb)

1021
1021
1021
1020
1020
1019
1019
1018
1018
1018
1018
1018
1018
1018
1018
1018
1018
1018
1018
1017
1017
1017
1017
1018

Ozone (du)

294
294
294
295
296
295
294
294
294
293
293
292
292
291
290
289
289
289
289
290
289
289
289
290

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
07 Bad
08 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)

97
73
76
96
96
58
55
51
53
74
76
91
90
91
96
100
98
97
96
98
99
100
100
100

Low Clouds (% Sky Obscured)

49
45
44
44
45
46
42
40
37
31
30
48
31
33
84
89
90
91
92
86
80
72
53
31

Medium Clouds (% Sky Obscured)

64
29
30
83
73
13
10
5
10
5
5
11
56
62
28
88
88
87
87
85
92
97
70
41

High Clouds (% Sky Obscured)

80
60
69
80
66
23
3
1
1
14
13
26
30
49
74
99
87
79
69
78
89
100
100
100

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
8
7
7
7
8
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
Very Light Rain
Very Light Rain
Light Rain
Very Light Rain
None
None
None
None
None
None
None
None
None
None
None
Light Rain
Light Rain
Light Rain
Light Rain
Very Light Rain
None
None
None

Precipitation Probability (%)

44
58
65
79
60
44
23
21
19
16
12
9
4
5
20
40
76
92
95
81
66
47
35
25

Precipitation Amount (mm)

0
0.2
0.3
0.4
0.3
0
0
0
0
0
0
0
0
0
0
0
0.4
0.7
1
0.4
0.2
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

19
20
20
21
21
22
22
22
22
22
22
21
20
19
19
19
19
18
18
18
18
18
18
18

Feels Like (°C)

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

Dew Point (°C)

15
13
10
9
8
8
8
7
8
10
12
13
13
11
12
12
12
14
15
17
16
16
16
15

Relative Humidity (%)

77
63
51
46
43
42
39
37
39
45
52
61
62
59
63
65
66
75
82
92
89
88
86
78

Pressure (mb)

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

Ozone (du)

290
292
292
291
291
291
292
292
292
292
291
290
290
290
290
290
291
292
293
295
300
304
309
310

Friday 4

Third Quarter 39%

22:30

15:48

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

100
98
97
95
67
42
16
38
61
80
79
78
76
70
64
58
43
39
30
47
63
78
75
72

Low Clouds (% Sky Obscured)

11
13
10
12
13
13
14
35
56
77
60
42
24
17
9
2
1
1
0
7
14
22
32
42

Medium Clouds (% Sky Obscured)

12
6
3
0
0
0
0
0
0
0
2
2
3
9
15
25
24
22
21
16
18
15
15
14

High Clouds (% Sky Obscured)

100
98
97
95
64
33
2
9
16
25
35
53
71
67
64
55
43
33
14
31
51
71
63
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 (%)

12
23
31
34
39
39
32
25
17
11
12
14
12
10
6
0
0
0
0
0
0
0
12
14

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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

72
66
59
53
49
47
46
44
50
55
61
63
65
67
69
72
74
75
76
77
76
76
76
68

Pressure (mb)

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

Ozone (du)

312
314
314
314
314
314
314
314
314
315
315
316
317
318
320
322
324
322
320
318
316
315
314
314

Saturday 5

Waning Crescent 28%

23:36

16:53

09 Bad
10 Bad
11 Bad
12 OK
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: 06:21, Set: 19:38, Transit: 12:59. Moon - Rise: 23:36, Set: 16:53. Civil Dark: 20:12 - 05:47. Nautical Dark: 20:55 - 05:05. Astro Dark: 21:41 - 04:20

Total Clouds (% Sky Obscured)

67
60
52
45
48
51
54
71
85
99
88
80
67
65
70
77
75
69
65
62
55
55

Low Clouds (% Sky Obscured)

52
41
30
19
13
8
2
3
5
7
5
3
0
0
0
0
0
0
0
2
4
6

Medium Clouds (% Sky Obscured)

9
8
6
4
4
3
1
2
4
5
5
4
0
0
5
10
18
25
27
36
36
37

High Clouds (% Sky Obscured)

46
38
30
21
27
39
54
71
85
92
68
43
16
12
8
3
2
3
3
4
5
6

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 (%)

8
10
6
1
1
1
0
0
0
0
0
0
0
2
5
8
9
9
8
10
11
11

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)

10
10
10
10
10
9
9
9
7
6
4
3
3
3
2
2
2
2
2
2
3
4

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

61
54
50
46
42
39
38
36
39
42
45
47
50
52
54
54
55
57
57
59
60
60

Pressure (mb)

1021
1022
1022
1023
1023
1023
1023
1023
1023
1024
1024
1024
1024
1025
1025
1025
1025
1024
1024
1024
1023
1023

Ozone (du)

313
312
311
310
309
308
307
306
305
303
302
300
298
297
296
294
293
293
294
294
295
295

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

Generated: 30/08/26 09:27:18. Forecast: 30/08/26 to 05/09/26. Timezone: UTC+1.00