Clear Outside v1.0 - International Weather Forecasts For Astronomers

Friday 31

Waning Gibbous 94%

21:37

07:14

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

Sun - Rise: 05:22, Set: 20:51, Transit: 13:07. Moon - Rise: 21:37, Set: 07:14. Civil Dark: 21:32 - 04:43. Nautical Dark: 22:28 - 03:48. Astro Dark: 23:47 - 02:31

Total Clouds (% Sky Obscured)

65
66
45
42
23
0
0
3
16
25
39
38
34
11
40
71
100
100
100
72
39
41
34
6

Low Clouds (% Sky Obscured)

65
25
19
17
12
0
0
2
11
18
6
2
3
8
18
59
55
3
3
0
0
0
12
3

Medium Clouds (% Sky Obscured)

22
26
23
13
0
0
0
0
0
0
26
26
21
5
18
32
50
78
85
31
30
34
23
3

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
6
17
100
100
100
51
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
1
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

13
12
13
14
15
18
20
20
21
22
22
22
22
22
22
21
17
15
14
13
12
13
13
12

Dew Point (°C)

8
7
7
5
4
4
4
3
2
1
1
0
0
1
1
2
2
3
6
7
6
6
6
7

Relative Humidity (%)

60
60
57
47
42
36
32
27
24
22
21
20
20
21
22
26
28
33
44
50
53
54
57
62

Pressure (mb)

1017
1018
1018
1019
1019
1019
1018
1018
1018
1018
1017
1017
1017
1017
1017
1017
1017
1018
1018
1019
1019
1019
1019
1019

Ozone (du)

348
351
355
360
360
358
357
359
361
363
362
360
359
358
358
356
353
351
351
353
358
362
366
372

Saturday 1

Waning Gibbous 88%

21:48

08:30

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

Sun - Rise: 05:24, Set: 20:49, Transit: 13:07. Moon - Rise: 21:48, Set: 08:30. Civil Dark: 21:30 - 04:45. Nautical Dark: 22:25 - 03:51. Astro Dark: 23:42 - 02:35

Total Clouds (% Sky Obscured)

0
0
0
0
0
0
0
28
40
60
64
44
32
56
69
50
48
65
71
94
98
91
95
99

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
8
13
0
1
2
2
2
0
2
2
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
17
22
47
42
23
17
21
16
16
15
20
26
12
36
42
27
54

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
2
3
3
33
52
27
28
44
44
88
93
61
85
97

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)

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

Chance of Frost

Temperature (°C)

13
12
14
16
18
20
21
22
23
24
24
25
25
24
24
23
20
19
17
16
16
15
15
14

Feels Like (°C)

12
11
13
15
17
19
20
21
22
22
23
23
22
23
22
22
20
17
14
12
12
11
11
10

Dew Point (°C)

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

Relative Humidity (%)

64
66
61
53
45
39
35
31
29
26
25
23
22
22
23
27
31
34
41
45
48
52
57
59

Pressure (mb)

1019
1020
1020
1020
1020
1020
1020
1020
1019
1019
1018
1018
1018
1018
1018
1018
1018
1019
1019
1019
1019
1019
1019
1019

Ozone (du)

374
372
370
367
363
359
358
353
348
346
342
339
337
336
335
335
335
334
334
333
333
333
334
334

Sunday 2

Waning Gibbous 80%

21:59

09:46

05 Bad
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

Sun - Rise: 05:25, Set: 20:48, Transit: 13:07. Moon - Rise: 21:59, Set: 09:46. Civil Dark: 21:28 - 04:47. Nautical Dark: 22:23 - 03:53. Astro Dark: 23:38 - 02:39

Total Clouds (% Sky Obscured)

100
83
100
72
54
65
77
62
100
98
100
100
100
99
100
100
100
100
95
61
68
74
79
72

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
21
11
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

46
48
75
37
18
51
29
20
17
28
30
20
94
48
32
75
32
22
14
20
26
54
76
25

High Clouds (% Sky Obscured)

100
83
95
72
30
28
25
30
100
94
100
100
100
97
100
100
100
100
90
30
31
32
20
24

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)

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

Chance of Frost

Temperature (°C)

13
13
14
16
18
20
23
25
26
27
27
27
27
26
24
23
21
19
18
17
16
16
16
16

Feels Like (°C)

10
10
11
12
16
18
21
23
24
24
24
23
22
22
20
19
17
17
16
14
14
13
13
13

Dew Point (°C)

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

Relative Humidity (%)

62
65
62
54
50
46
39
33
28
25
24
24
27
28
29
34
40
49
54
61
68
74
77
77

Pressure (mb)

1018
1018
1018
1019
1019
1018
1018
1017
1017
1016
1015
1015
1015
1015
1015
1015
1015
1015
1015
1015
1014
1014
1013
1013

Ozone (du)

334
334
333
332
331
330
330
329
329
328
327
328
329
329
329
330
330
331
331
331
330
330
331
330

Monday 3

Waning Gibbous 71%

22:11

11:03

05 Bad
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

Sun - Rise: 05:27, Set: 20:46, Transit: 13:07. Moon - Rise: 22:11, Set: 11:03. Civil Dark: 21:26 - 04:49. Nautical Dark: 22:20 - 03:55. Astro Dark: 23:34 - 02:43

Total Clouds (% Sky Obscured)

81
86
86
85
85
88
94
100
100
100
98
81
99
93
99
80
97
100
100
100
100
100
100
96

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
21
12
16
17
12
3
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

28
23
19
15
85
88
94
79
92
89
72
38
52
48
19
23
23
25
32
91
95
95
99
96

High Clouds (% Sky Obscured)

37
51
53
54
59
73
86
100
72
68
65
71
98
73
99
68
93
100
100
100
100
100
100
50

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
4
6
8
9
10
11
10
7
0
3
4
4
6
7
6
9

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)

7
7
8
9
9
8
8
8
6
5
6
6
5
5
5
6
8
8
6
6
5
5
4
3

Chance of Frost

Temperature (°C)

15
16
17
19
21
23
25
27
28
29
29
29
29
29
28
26
23
21
20
20
19
19
19
18

Feels Like (°C)

14
14
14
17
19
21
24
25
27
28
27
28
29
27
27
24
22
20
19
18
18
18
18
18

Dew Point (°C)

13
13
13
12
12
11
11
11
9
8
8
7
5
5
5
7
9
11
12
12
12
13
13
13

Relative Humidity (%)

83
86
77
65
55
46
40
36
30
27
26
24
21
21
22
29
40
51
57
62
64
68
68
71

Pressure (mb)

1013
1013
1013
1012
1012
1012
1012
1011
1011
1010
1010
1010
1009
1009
1009
1009
1010
1010
1010
1010
1010
1010
1010
1009

Ozone (du)

328
328
328
328
328
329
330
332
332
331
331
328
327
326
326
327
326
328
329
330
327
327
325
321

Tuesday 4

Waning Gibbous 71%

22:24

12:24

05 Bad
06 Bad
07 OK
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

Sun - Rise: 05:29, Set: 20:44, Transit: 13:06. Moon - Rise: 22:24, Set: 12:24. Civil Dark: 21:24 - 04:50. Nautical Dark: 22:18 - 03:58. Astro Dark: 23:29 - 02:47

Total Clouds (% Sky Obscured)

93
73
45
82
78
82
90
100
100
100
100
94
88
83
94
93
93
82
67
63
77
81
86
88

Low Clouds (% Sky Obscured)

0
0
0
0
0
7
13
25
29
59
79
80
77
79
90
90
89
63
37
11
15
11
11
8

Medium Clouds (% Sky Obscured)

93
62
29
63
78
66
44
23
29
32
27
26
21
50
66
68
70
60
48
38
29
21
20
33

High Clouds (% Sky Obscured)

49
17
1
49
50
67
82
100
100
100
100
47
27
9
17
9
0
0
0
0
0
0
0
16

ISS Passover

Visibility (miles)

9
9
9
9
8
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 (%)

9
4
5
7
16
7
8
5
13
18
23
22
19
15
29
30
27
26
24
14
14
12
9
13

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
2
5
6
6
5
6
7
8
8
9
9
8
8
8
6
5
5
5
4
4
4
5
5

Chance of Frost

Temperature (°C)

18
18
19
21
23
24
26
27
28
28
29
28
28
28
26
24
23
22
21
20
19
19
18
18

Feels Like (°C)

18
18
19
21
22
24
26
26
27
27
27
26
26
27
25
25
24
24
23
23
23
20
20
21

Dew Point (°C)

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

Relative Humidity (%)

73
73
68
64
58
51
42
35
31
29
28
29
26
27
36
42
49
59
63
69
73
76
76
78

Pressure (mb)

1009
1010
1010
1010
1010
1011
1011
1011
1011
1011
1011
1011
1011
1010
1011
1012
1012
1013
1013
1013
1013
1013
1014
1014

Ozone (du)

318
320
320
319
316
315
313
312
313
313
313
312
311
310
310
310
310
310
311
311
312
312
311
311

Wednesday 5

Waning Gibbous 60%

22:42

13:48

05 Bad
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

Sun - Rise: 05:30, Set: 20:43, Transit: 13:06. Moon - Rise: 22:42, Set: 13:48. Civil Dark: 21:22 - 04:52. Nautical Dark: 22:15 - 04:00. Astro Dark: 23:25 - 02:51

Total Clouds (% Sky Obscured)

90
89
86
85
84
80
76
73
77
81
77
80
90
99
82
66
46
51
55
60
64
69
77
82

Low Clouds (% Sky Obscured)

9
9
16
28
40
47
56
65
75
81
77
80
72
62
58
47
46
46
54
57
57
53
49
55

Medium Clouds (% Sky Obscured)

39
49
49
51
55
42
29
20
18
14
12
13
16
18
13
8
3
2
2
1
3
4
6
13

High Clouds (% Sky Obscured)

31
49
33
16
0
0
0
0
0
0
0
17
34
46
31
18
1
4
8
12
19
29
40
49

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

Precipitation Probability (%)

19
20
28
37
48
45
44
41
38
33
25
24
27
35
33
25
7
6
5
2
5
7
7
11

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

78
81
81
75
68
64
56
50
45
43
42
40
42
44
45
48
52
56
62
67
72
80
88
95

Pressure (mb)

1014
1014
1014
1014
1015
1015
1015
1015
1015
1015
1015
1015
1015
1015
1015
1015
1016
1016
1016
1016
1016
1016
1016
1016

Ozone (du)

311
310
310
311
312
313
313
313
313
313
313
313
312
312
312
312
312
312
313
314
315
315
316
316

Thursday 6

Third Quarter 49%

23:07

15:15

05 Bad
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: 05:32, Set: 20:41, Transit: 13:06. Moon - Rise: 23:07, Set: 15:15. Civil Dark: 21:20 - 04:54. Nautical Dark: 22:13 - 04:02. Astro Dark: 23:21 - 02:55

Total Clouds (% Sky Obscured)

89
97
94
91
89
85
82
79
83
87
91
92
95
96
98
99
100
100
100
100

Low Clouds (% Sky Obscured)

62
66
63
59
55
54
54
53
64
74
84
69
56
42
63
77
91
91
91
90

Medium Clouds (% Sky Obscured)

17
22
21
23
22
23
20
20
28
29
30
25
26
21
23
29
30
30
30
30

High Clouds (% Sky Obscured)

66
90
72
54
34
32
29
26
22
19
14
35
56
69
68
65
66
75
86
99

ISS Passover

Visibility (miles)

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

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain

Precipitation Probability (%)

10
5
7
5
2
14
18
19
22
22
16
27
28
20
52
73
90
95
95
95

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.4
0.6
0.7
0.9
0.8

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

17
17
17
18
20
21
23
24
25
26
27
27
26
26
25
23
21
19
19
18

Feels Like (°C)

18
18
17
18
19
19
20
21
22
28
27
26
26
26
26
24
23
22
21
21

Dew Point (°C)

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

Relative Humidity (%)

93
92
90
82
75
68
63
58
53
50
46
42
45
47
49
61
74
91
90
90

Pressure (mb)

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

Ozone (du)

316
317
317
317
317
317
317
317
316
316
316
315
316
316
317
317
317
317
317
318

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

Generated: 31/07/26 05:50:04. Forecast: 31/07/26 to 06/08/26. Timezone: UTC+1.00