Clear Outside v1.0 - International Weather Forecasts For Astronomers

Monday 29

Waning Gibbous 64%

02:47

09:49

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

Sun - Rise: 05:31, Set: 20:22, Transit: 12:58. Moon - Rise: 02:47, Set: 09:49. Civil Dark: 21:01 - 04:52. Nautical Dark: 21:50 - 04:02. Astro Dark: 22:52 - 02:59

Total Clouds (% Sky Obscured)

83
78
70
39
57
65
71
46
19
35
35
42
29
3
2
2
0
6
0
49
40
87
82
96

Low Clouds (% Sky Obscured)

41
48
38
35
28
32
20
2
2
0
0
2
0
0
0
0
0
6
0
11
0
2
43
61

Medium Clouds (% Sky Obscured)

31
2
2
0
0
0
2
23
3
43
38
46
28
1
0
0
0
0
0
0
5
45
78
92

High Clouds (% Sky Obscured)

54
25
6
6
49
60
71
36
12
3
3
4
3
2
3
3
0
0
0
53
55
89
55
58

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
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)

15
15
16
17
17
16
14
13
11
9
9
9
8
8
7
7
7
6
6
6
8
10
11
13

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

60
58
57
57
60
62
66
71
73
78
80
81
82
85
88
91
91
91
91
90
82
80
74
69

Pressure (mb)

1015
1015
1015
1015
1015
1015
1014
1014
1015
1015
1015
1015
1015
1015
1015
1014
1014
1014
1013
1013
1013
1013
1012
1012

Ozone (du)

437
440
443
438
435
442
440
437
440
441
438
432
433
434
429
426
427
431
432
431
432
434
435
430

Tuesday 30

Waning Gibbous 53%

03:17

11:15

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
09 Bad
10 Bad
11 Bad

Sun - Rise: 05:29, Set: 20:24, Transit: 12:57. Moon - Rise: 03:17, Set: 11:15. Civil Dark: 21:03 - 04:50. Nautical Dark: 21:53 - 04:00. Astro Dark: 22:56 - 02:56

Total Clouds (% Sky Obscured)

98
96
98
98
100
94
93
91
93
86
73
69
64
62
100
100
100
100
100
100
100
99
100
99

Low Clouds (% Sky Obscured)

58
63
85
69
86
65
58
48
59
61
45
47
44
40
35
38
40
56
51
40
38
20
49
62

Medium Clouds (% Sky Obscured)

96
93
95
95
93
89
83
81
48
57
57
64
60
60
60
60
56
50
83
73
100
98
100
96

High Clouds (% Sky Obscured)

55
60
50
25
23
7
4
1
50
46
56
40
40
25
100
96
100
99
100
76
62
55
68
60

ISS Passover

Visibility (miles)

9
9
5
9
4
0
0
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
12
0
0
0
0
0

Precipitation Type

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

Precipitation Probability (%)

29
47
58
69
83
59
28
20
17
2
0
0
0
0
0
0
0
0
0
0
0
0
1
3

Precipitation Amount (mm)

0
0
0.3
0.4
0.8
0.2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

14
15
12
9
7
6
6
6
6
5
5
5
5
4
4
3
3
2
1
1
2
3
4
4

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

68
70
90
95
96
98
100
98
96
96
96
98
95
95
96
96
95
95
93
91
87
81
78
74

Pressure (mb)

1011
1011
1010
1010
1009
1009
1009
1009
1009
1009
1009
1009
1009
1009
1009
1009
1009
1009
1009
1009
1009
1010
1010
1009

Ozone (du)

427
430
431
432
433
433
433
429
432
432
431
434
434
435
426
424
424
422
420
415
412
411
410
408

Wednesday 1

Third Quarter 41%

03:39

No Set

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
09 Bad
10 Bad
11 Bad

Sun - Rise: 05:27, Set: 20:26, Transit: 12:57. Moon - Rise: 03:39, Set: No Set. Civil Dark: 21:04 - 04:48. Nautical Dark: 21:55 - 03:57. Astro Dark: 22:59 - 02:52

Total Clouds (% Sky Obscured)

100
100
100
100
99
100
100
100
100
100
100
94
100
100
100
100
100
100
100
100
100
100
95
91

Low Clouds (% Sky Obscured)

85
95
79
69
46
56
47
70
75
82
83
88
94
100
100
100
100
100
100
100
100
100
85
70

Medium Clouds (% Sky Obscured)

95
86
64
62
58
66
71
100
100
99
85
88
70
36
55
40
35
52
58
56
54
52
60
67

High Clouds (% Sky Obscured)

66
100
58
55
62
92
100
100
100
100
60
68
84
100
100
100
100
100
73
87
94
88
80
67

ISS Passover

Visibility (miles)

9
9
9
9
9
5
7
9
9
2
0
0
0
0
0
0
0
0
0
0
0
0
6
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
52
21
24
24
24
24
24
24
24
24
24
24
24

Precipitation Type

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

Precipitation Probability (%)

11
14
39
57
67
64
57
41
72
62
49
54
61
82
95
73
66
70
59
58
66
71
79
84

Precipitation Amount (mm)

0
0
0
0.2
0.4
0.3
0.3
0
0.5
0.2
0
0.4
0.5
0.6
0.8
0.4
0.3
0.3
0
0.4
0.6
0.9
0.8
0.9

Wind Speed/Direction (mph)

4
5
7
7
6
8
8
8
9
9
11
10
11
12
12
11
10
10
9
9
11
9
8
7

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

70
67
68
79
83
78
86
90
95
98
98
98
96
96
98
98
98
100
98
98
98
96
93
90

Pressure (mb)

1009
1009
1008
1008
1007
1007
1007
1006
1007
1007
1006
1006
1005
1004
1004
1003
1003
1003
1003
1003
1002
1002
1003
1003

Ozone (du)

409
409
411
412
412
410
406
403
402
401
400
399
400
399
397
394
391
387
384
383
382
383
383
382

Thursday 2

Waning Crescent 30%

03:55

12:44

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
09 Bad
10 Bad
11 Bad

Sun - Rise: 05:25, Set: 20:27, Transit: 12:57. Moon - Rise: 03:55, Set: 12:44. Civil Dark: 21:06 - 04:46. Nautical Dark: 21:57 - 03:55. Astro Dark: 23:03 - 02:48

Total Clouds (% Sky Obscured)

85
85
83
81
79
75
73
74
79
80
83
88
91
92
93
94
96
97
99
99
99
98
99
99

Low Clouds (% Sky Obscured)

57
48
39
34
39
44
52
54
60
62
65
75
83
84
84
85
89
94
99
96
94
92
95
97

Medium Clouds (% Sky Obscured)

76
77
76
75
71
66
55
51
51
44
29
49
2
53
55
56
72
80
88
88
72
85
89
91

High Clouds (% Sky Obscured)

50
41
65
70
49
61
56
59
54
69
66
61
65
65
9
5
31
45
45
48
47
46
53
56

ISS Passover

Visibility (miles)

9
9
9
8
9
9
8
8
9
8
2
2
0
0
7
8
6
9
9
9
9
3
7
8

Fog (%)

24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24

Precipitation Type

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

Precipitation Probability (%)

90
83
77
70
61
53
54
50
52
35
31
39
49
44
53
62
61
51
56
69
95
93
78
91

Precipitation Amount (mm)

1.2
0.8
0.6
0.4
0.3
0.2
0.3
0
0
0
0
0
0
0
0
0
0.2
0
0
0
0.7
0.7
0.4
0.7

Wind Speed/Direction (mph)

7
7
6
5
5
5
5
6
7
7
7
6
4
4
6
8
9
10
9
10
12
13
13
12

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

14
15
16
17
18
18
18
16
14
12
11
10
10
10
9
7
6
5
6
5
6
7
8
9

Dew Point (°C)

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

Relative Humidity (%)

92
92
90
93
93
93
93
95
96
98
98
96
98
98
96
95
96
96
95
95
95
96
96
96

Pressure (mb)

1003
1003
1003
1003
1003
1003
1003
1003
1004
1005
1005
1005
1005
1006
1006
1006
1006
1006
1007
1007
1007
1008
1008
1008

Ozone (du)

383
383
382
381
381
380
380
382
381
380
379
376
374
373
372
372
372
373
372
373
373
372
371
371

Friday 3

Waning Crescent 19%

04:08

14:13

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
09 Bad
10 Bad
11 Bad

Sun - Rise: 05:23, Set: 20:29, Transit: 12:57. Moon - Rise: 04:08, Set: 14:13. Civil Dark: 21:08 - 04:44. Nautical Dark: 22:00 - 03:52. Astro Dark: 23:06 - 02:44

Total Clouds (% Sky Obscured)

100
99
99
99
99
100
100
99
99
98
98
85
86
90
90
90
84
78
67
59
58
57
67
78

Low Clouds (% Sky Obscured)

100
99
98
98
96
92
92
64
41
28
28
28
30
39
47
55
54
55
57
55
52
45
51
57

Medium Clouds (% Sky Obscured)

96
95
95
95
97
98
100
99
98
77
62
64
65
69
63
63
58
50
42
31
19
10
22
37

High Clouds (% Sky Obscured)

66
63
61
58
50
43
45
45
42
45
52
16
22
15
9
2
2
3
5
13
20
29
23
13

ISS Passover

Visibility (miles)

8
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24

Precipitation Type

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

Precipitation Probability (%)

76
66
64
43
37
37
39
44
46
48
43
38
32
56
43
24
18
12
3
6
6
3
23
30

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

96
93
89
89
89
89
87
87
88
93
93
95
96
96
96
98
96
95
93
91
87
83
79
75

Pressure (mb)

1008
1008
1009
1009
1009
1009
1010
1010
1010
1011
1011
1011
1011
1011
1011
1011
1011
1011
1011
1012
1012
1012
1012
1012

Ozone (du)

373
372
371
373
375
376
379
381
382
384
387
387
386
385
383
382
381
380
380
379
379
379
379
380

Saturday 4

Waning Crescent 10%

04:21

15:41

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
09 Bad
10 Bad
11 Bad

Sun - Rise: 05:22, Set: 20:31, Transit: 12:57. Moon - Rise: 04:21, Set: 15:41. Civil Dark: 21:10 - 04:42. Nautical Dark: 22:02 - 03:49. Astro Dark: 23:10 - 02:40

Total Clouds (% Sky Obscured)

89
88
87
86
85
85
84
71
61
54
59
63
66
76
85
94
95
95
93
89
84
73
76
79

Low Clouds (% Sky Obscured)

63
66
69
73
67
60
54
46
38
29
31
35
38
44
50
56
68
80
92
85
78
71
56
43

Medium Clouds (% Sky Obscured)

54
54
48
41
27
14
0
0
0
0
3
6
10
20
31
40
29
15
0
1
2
2
16
29

High Clouds (% Sky Obscured)

6
5
5
5
18
31
39
36
37
41
43
42
47
60
68
65
47
31
19
21
21
24
31
38

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 (%)

24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24

Precipitation Type

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

Precipitation Probability (%)

33
44
51
56
56
52
52
46
31
3
8
6
0
0
1
1
2
3
2
3
2
0
6
6

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

9
9
9
9
9
10
10
11
10
10
9
9
9
8
8
8
8
8
8
8
8
8
9
8

Relative Humidity (%)

72
70
70
71
71
76
80
86
89
91
95
95
96
98
96
96
96
95
95
93
85
79
74
65

Pressure (mb)

1012
1011
1011
1011
1011
1011
1011
1011
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012
1012
1013
1013
1013

Ozone (du)

380
381
381
380
380
380
380
381
381
382
382
383
383
383
384
384
385
386
387
388
389
391
392
393

Sunday 5

Waning Crescent 4%

04:33

17:10

12 Bad
13 Bad
14 Bad
15 OK
16 OK
17 OK
18 OK
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: 05:20, Set: 20:32, Transit: 12:57. Moon - Rise: 04:33, Set: 17:10. Civil Dark: 21:12 - 04:40. Nautical Dark: 22:04 - 03:47. Astro Dark: 23:14 - 02:36

Total Clouds (% Sky Obscured)

85
73
60
47
44
42
32
48
56
69
71
74
80
86
93
99
99
98
98

Low Clouds (% Sky Obscured)

36
37
36
34
31
28
20
21
19
17
24
33
42
51
53
58
66
74
81

Medium Clouds (% Sky Obscured)

42
30
15
0
7
14
21
32
40
55
60
60
65
63
60
58
52
46
45

High Clouds (% Sky Obscured)

41
32
17
7
5
3
1
22
39
49
42
34
29
52
76
99
88
73
55

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24

Precipitation Type

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

Precipitation Probability (%)

3
2
1
0
1
2
1
2
3
0
1
2
1
2
2
0
2
3
4

Precipitation Amount (mm)

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
9
9
8
8
7
7
6
6
6
6
6
6
6
6
7
7

Chance of Frost

Temperature (°C)

15
15
16
16
17
16
16
15
14
13
11
11
11
10
10
10
10
10
10

Feels Like (°C)

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

Dew Point (°C)

7
6
6
6
7
7
9
9
9
9
8
8
8
8
8
7
6
7
7

Relative Humidity (%)

59
53
53
52
51
56
62
67
71
76
81
83
84
87
84
81
78
80
80

Pressure (mb)

1013
1013
1012
1012
1012
1012
1012
1012
1012
1013
1013
1013
1013
1013
1013
1013
1013
1013
1013

Ozone (du)

395
396
397
398
399
395
391
387
388
389
390
390
390
389
390
390
391
390
389

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

Generated: 29/04/24 11:34:27. Forecast: 29/04/24 to 05/05/24. Timezone: UTC+1.00