Clear Outside v1.0 - International Weather Forecasts For Astronomers

Friday 29

Waxing Gibbous 98%

19:49

03:38

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

Sun - Rise: 04:48, Set: 21:06, Transit: 12:58. Moon - Rise: 19:49, Set: 03:38. Civil Dark: 21:52 - 04:03. Nautical Dark: 22:59 - 02:55. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

16
16
0
0
0
0
1
0
22
39
47
42
26
6
40
97
97
96
98
100
97
88
66
71

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
5
0
0
0
3
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

16
2
0
0
0
0
0
0
3
10
14
12
7
0
9
6
12
12
8
11
22
22
25
25

High Clouds (% Sky Obscured)

16
16
0
0
0
0
1
0
2
19
22
42
14
6
40
96
91
90
97
100
93
84
49
65

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

Chance of Frost

Temperature (°C)

23
22
20
18
17
16
15
14
14
13
13
12
13
14
16
18
20
22
23
25
25
26
26
25

Feels Like (°C)

22
21
20
19
18
16
15
14
14
13
11
11
11
14
14
17
20
22
23
24
24
24
24
23

Dew Point (°C)

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

Relative Humidity (%)

55
61
68
70
73
82
87
89
90
84
77
70
65
59
55
52
51
50
46
42
40
41
41
44

Pressure (mb)

1022
1022
1023
1023
1023
1023
1023
1023
1022
1022
1022
1022
1022
1022
1022
1022
1021
1021
1020
1019
1019
1018
1018
1017

Ozone (du)

331
333
337
339
340
341
341
338
335
335
335
334
332
331
330
331
333
333
333
335
335
334
334
335

Saturday 30

Waxing Gibbous 100%

21:01

04:06

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

Sun - Rise: 04:47, Set: 21:08, Transit: 12:58. Moon - Rise: 21:01, Set: 04:06. Civil Dark: 21:53 - 04:02. Nautical Dark: 23:01 - 02:53. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

5
7
100
100
97
100
78
65
76
45
78
100
95
100
100
100
100
100
100
100
96
95
98
88

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
54
42
55
38
53
52
63
43
46
40
45
38
48
31

Medium Clouds (% Sky Obscured)

2
0
0
0
47
80
34
25
30
45
55
24
12
0
0
79
89
100
97
97
70
56
62
41

High Clouds (% Sky Obscured)

3
7
100
100
90
100
61
50
45
2
41
100
90
100
100
100
100
100
100
100
30
1
2
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
8

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
Very Light Rain

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
16
2
0
18
5
26
42

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
0.3

Wind Speed/Direction (mph)

7
7
7
7
6
6
7
6
7
7
6
6
7
7
8
11
11
11
12
13
13
13
12
12

Chance of Frost

Temperature (°C)

25
24
22
20
19
17
16
16
15
15
14
14
14
15
16
17
18
19
19
20
20
20
21
20

Feels Like (°C)

23
24
22
18
17
16
14
14
13
13
13
12
12
12
13
15
15
16
16
17
16
17
18
18

Dew Point (°C)

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

Relative Humidity (%)

48
57
67
70
70
71
69
74
76
84
89
89
78
71
66
73
67
61
54
50
51
60
59
57

Pressure (mb)

1017
1017
1017
1017
1016
1016
1016
1016
1016
1016
1015
1015
1016
1016
1016
1016
1016
1016
1016
1015
1015
1015
1015
1015

Ozone (du)

340
338
338
339
341
344
350
357
361
355
352
349
348
349
352
353
351
351
353
352
354
357
361
361

Sunday 31

Full Moon 99%

22:07

04:44

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

Sun - Rise: 04:47, Set: 21:09, Transit: 12:58. Moon - Rise: 22:07, Set: 04:44. Civil Dark: 21:55 - 04:01. Nautical Dark: 23:03 - 02:52. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

78
48
56
33
35
30
59
97
62
79
85
88
64
70
100
100
100
100
99
100
100
100
100
100

Low Clouds (% Sky Obscured)

29
37
38
33
19
23
42
55
38
40
53
51
28
34
42
59
86
100
60
72
78
88
88
84

Medium Clouds (% Sky Obscured)

33
21
24
13
15
9
10
4
0
9
13
10
11
14
81
33
83
93
80
100
99
93
100
100

High Clouds (% Sky Obscured)

0
0
0
0
0
0
26
89
50
49
37
88
47
53
100
100
86
93
36
25
31
23
49
74

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
Light Rain
Light Rain

Precipitation Probability (%)

21
2
2
0
0
0
0
0
0
0
0
0
0
0
0
1
11
2
14
22
36
51
68
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
0.8

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

17
18
18
17
16
14
13
13
11
10
10
10
10
12
14
13
14
15
15
16
16
15
14
13

Dew Point (°C)

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

Relative Humidity (%)

72
70
73
79
85
87
90
92
93
93
92
93
90
81
75
68
66
73
67
72
76
67
68
87

Pressure (mb)

1015
1015
1015
1016
1016
1016
1016
1016
1016
1016
1016
1016
1016
1015
1015
1015
1014
1014
1013
1013
1012
1011
1011
1010

Ozone (du)

354
345
341
337
337
337
336
335
333
332
333
333
332
330
329
329
330
332
333
334
336
338
339
339

Monday 1

Waning Gibbous 97%

23:02

05:36

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
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad

Sun - Rise: 04:46, Set: 21:10, Transit: 12:58. Moon - Rise: 23:02, Set: 05:36. Civil Dark: 21:56 - 04:00. Nautical Dark: 23:05 - 02:50. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
100
100
79
88
93
100
100
100
99
100
97
82

Low Clouds (% Sky Obscured)

87
90
94
98
94
90
86
88
90
94
86
79
73
74
64
70
69
72
67
66
63
64
45
54

Medium Clouds (% Sky Obscured)

99
100
100
100
100
80
72
100
100
100
95
89
25
20
26
21
18
12
6
20
29
35
35
35

High Clouds (% Sky Obscured)

100
100
100
100
100
100
91
100
100
100
100
86
92
100
71
60
60
65
65
67
80
81
97
82

ISS Passover

Visibility (miles)

2
3
4
6
1
6
8
2
1
4
0
6
4
9
9
5
9
9
9
9
9
4
8
8

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

Precipitation Probability (%)

95
95
95
72
82
88
95
66
46
46
34
31
27
21
35
45
51
59
74
83
88
85
95
95

Precipitation Amount (mm)

1.7
1.1
1.1
0.3
0.4
0.5
0.7
0.3
0
0
0
0
0
0
0
0
0
0.2
0.5
0.5
0.5
0.4
0.7
0.7

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

90
95
96
96
96
98
96
98
96
96
96
98
96
95
93
83
78
72
66
61
60
59
76
76

Pressure (mb)

1010
1009
1008
1008
1007
1007
1006
1005
1005
1005
1004
1004
1004
1004
1004
1004
1004
1004
1004
1004
1003
1003
1003
1004

Ozone (du)

340
345
348
352
356
362
364
366
368
370
372
375
376
380
381
384
388
392
394
395
396
396
396
392

Tuesday 2

Waning Gibbous 93%

23:44

06:38

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

Sun - Rise: 04:45, Set: 21:11, Transit: 12:59. Moon - Rise: 23:44, Set: 06:38. Civil Dark: 21:57 - 03:59. Nautical Dark: 23:07 - 02:48. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

79
78
82
78
58
43
23
28
34
43
46
50
54
97
96
95
88
82
76
69
61
53
69
84

Low Clouds (% Sky Obscured)

53
54
58
59
41
21
0
13
25
38
43
47
52
83
84
85
73
60
48
50
51
53
50
48

Medium Clouds (% Sky Obscured)

50
57
53
40
28
22
12
8
4
0
0
0
45
84
79
72
69
66
63
42
21
0
12
30

High Clouds (% Sky Obscured)

79
65
46
27
19
9
1
0
6
15
30
25
1
3
4
4
8
10
14
13
11
10
37
61

ISS Passover

Visibility (miles)

8
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
6
3
0
3
6
8
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
None
None
None
None
None
None
None
None
None
None
Very Light Rain
Light Rain
Light Rain
Very Light Rain
Very Light Rain
None
None
None
Very Light Rain
Very Light Rain

Precipitation Probability (%)

95
95
83
61
40
20
0
0
0
0
0
0
12
48
62
73
70
63
54
47
45
49
55
56

Precipitation Amount (mm)

0.7
0.7
0.6
0.4
0
0
0
0
0
0
0
0
0
0
0.3
0.5
0.4
0.3
0.2
0
0
0
0.2
0.3

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

81
86
87
89
90
93
96
96
96
95
96
95
95
93
95
95
96
96
95
96
90
83
78
81

Pressure (mb)

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

Ozone (du)

387
381
378
372
370
365
361
357
353
351
351
351
348
347
349
351
352
357
361
366
370
373
377
385

Wednesday 3

Waning Gibbous 88%

00:15

07:49

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
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad

Sun - Rise: 04:45, Set: 21:12, Transit: 12:59. Moon - Rise: 00:15, Set: 07:49. Civil Dark: 21:58 - 03:58. Nautical Dark: 23:09 - 02:47. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

97
97
93
93
92
95
98
98
96
95
97
95
97
95
90
85
88
90
94
91
89
90
87
83

Low Clouds (% Sky Obscured)

39
48
59
69
77
85
94
83
73
63
55
44
34
38
43
47
63
76
90
85
76
71
66
63

Medium Clouds (% Sky Obscured)

35
30
22
22
21
29
37
41
38
22
35
55
70
58
47
30
14
9
5
21
35
49
45
38

High Clouds (% Sky Obscured)

76
65
60
65
78
85
90
89
83
81
76
66
60
41
16
2
2
1
1
19
30
45
33
18

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
Very Light Rain
Very Light Rain
Very Light Rain

Precipitation Probability (%)

58
47
37
23
36
44
50
43
37
34
34
29
15
14
14
16
31
39
42
47
50
54
55
58

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

82
83
87
89
90
89
89
86
87
89
90
88
86
84
75
68
60
59
58
57
59
61
64
66

Pressure (mb)

1001
1001
1001
1001
1001
1000
1000
999
999
999
998
999
999
999
999
999
999
999
999
999
999
999
999
1000

Ozone (du)

393
402
401
401
401
399
397
396
396
397
397
399
400
402
402
401
401
401
400
400
398
396
394
391

Thursday 4

Waning Gibbous 81%

00:38

09:04

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
09 Bad
10 Bad
11 Bad
12 Bad

Sun - Rise: 04:44, Set: 21:13, Transit: 12:59. Moon - Rise: 00:38, Set: 09:04. Civil Dark: 22:00 - 03:57. Nautical Dark: 23:11 - 02:46. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

80
80
88
91
93
95
97
91
86
86
91
92
91
94
96
99
94
88
79

Low Clouds (% Sky Obscured)

58
50
44
37
42
46
54
59
61
63
48
37
26
26
24
25
44
66
79

Medium Clouds (% Sky Obscured)

30
34
38
42
46
47
53
54
46
38
44
45
50
66
77
96
86
74
63

High Clouds (% Sky Obscured)

0
26
60
90
89
88
86
63
41
17
12
9
10
10
10
10
8
10
10

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

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

Precipitation Probability (%)

62
54
43
22
18
12
0
1
0
0
0
0
0
6
11
13
27
34
42

Precipitation Amount (mm)

0.4
0.3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

10
10
9
9
9
9
9
9
6
7
7
6
7
6
10
9
10
11
12

Dew Point (°C)

9
9
9
8
8
7
7
7
7
7
7
7
8
8
8
7
7
8
10

Relative Humidity (%)

68
71
72
74
76
76
77
78
81
84
87
83
81
79
72
65
60
67
75

Pressure (mb)

1000
1000
1001
1001
1001
1001
1002
1002
1002
1002
1003
1003
1003
1004
1004
1005
1005
1006
1006

Ozone (du)

387
384
386
388
390
391
393
395
397
400
402
403
405
407
407
407
408
405
402

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

Generated: 29/05/26 18:24:29. Forecast: 29/05/26 to 04/06/26. Timezone: UTC+1.00