Clear Outside v1.0 - International Weather Forecasts For Astronomers

Sunday 31

Full Moon 99%

22:07

04:44

19 Bad
20 OK
21 OK
22 OK
23 OK
00 OK
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
18 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)

42
35
41
29
28
34
48
47
82
87
98
97
79
100
98
100
100
100
100
98
97
97
95
96

Low Clouds (% Sky Obscured)

38
35
23
29
28
34
44
38
64
50
47
24
31
37
46
54
61
52
50
75
91
96
90
85

Medium Clouds (% Sky Obscured)

41
26
16
0
0
0
1
0
6
19
24
26
20
24
24
91
100
100
100
32
31
59
91
95

High Clouds (% Sky Obscured)

0
0
0
0
2
8
4
6
13
36
93
55
24
100
92
100
100
100
100
41
90
68
66
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
5

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
Very Light Rain
Very Light Rain
None
None
None
None

Precipitation Probability (%)

12
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2
29
53
43
16
5
35
25

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

73
76
83
87
90
92
93
93
93
92
93
90
82
73
65
60
55
52
58
66
56
51
55
78

Pressure (mb)

1016
1016
1017
1017
1017
1017
1017
1017
1017
1017
1017
1017
1017
1017
1016
1016
1015
1015
1015
1014
1013
1012
1012
1011

Ozone (du)

354
348
346
344
343
343
343
342
339
337
337
338
335
335
335
335
335
335
336
338
338
339
341
343

Monday 1

Waning Gibbous 97%

23:02

05:36

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
18 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
99
96
99
100
100
100
100
100
75
100
79
100

Low Clouds (% Sky Obscured)

89
87
87
85
86
87
86
85
87
81
88
66
68
66
71
70
57
47
42
55
59
45
49
46

Medium Clouds (% Sky Obscured)

40
97
99
100
97
94
98
100
98
95
100
100
81
55
73
100
89
75
80
79
45
61
50
68

High Clouds (% Sky Obscured)

100
95
92
100
100
100
100
100
100
100
100
100
94
62
95
100
55
68
100
100
48
100
61
100

ISS Passover

Visibility (miles)

9
8
2
3
3
1
0
0
0
0
0
9
9
9
9
4
3
8
4
4
8
4
3
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
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
None
Very Light Rain
Very Light Rain
Very Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Very Light Rain
None

Precipitation Probability (%)

42
92
95
95
95
95
95
95
95
95
75
41
51
52
65
85
92
95
95
95
95
84
67
52

Precipitation Amount (mm)

0
0.7
1.2
1.2
1.2
0.8
0.5
1.4
1
0.9
0.4
0
0.2
0.2
0.3
0.7
0.6
0.7
0.9
1.1
0.8
0.6
0.3
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

89
87
95
95
96
98
96
100
96
96
98
95
96
92
83
79
81
74
73
75
77
80
78
83

Pressure (mb)

1011
1010
1009
1009
1008
1007
1006
1006
1005
1004
1004
1003
1003
1003
1003
1003
1004
1003
1003
1003
1003
1003
1004
1004

Ozone (du)

343
344
347
348
349
352
356
360
365
370
372
377
379
381
378
382
387
389
392
395
393
392
392
392

Tuesday 2

Waning Gibbous 93%

23:44

06:38

19 Bad
20 Bad
21 Bad
22 Good
23 Good
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
18 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)

93
27
43
4
0
19
19
27
35
45
80
89
76
85
100
100
100
100
100
100
100
92
84
77

Low Clouds (% Sky Obscured)

32
22
23
0
0
19
19
27
35
45
62
69
62
51
55
44
54
100
100
100
100
89
79
68

Medium Clouds (% Sky Obscured)

21
11
43
4
0
0
0
0
0
0
8
11
6
15
98
84
30
33
34
48
35
30
71
65

High Clouds (% Sky Obscured)

70
12
43
3
0
0
0
0
2
8
37
40
46
60
100
100
100
98
86
72
58
47
36
25

ISS Passover

Visibility (miles)

9
9
4
9
9
9
9
9
9
9
9
9
8
9
9
9
9
9
9
9
9
9
9
6

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
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 (%)

65
66
30
0
0
0
0
0
0
0
0
0
0
0
0
2
3
2
2
2
7
20
95
79

Precipitation Amount (mm)

0.4
0.5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.9
0.5

Wind Speed/Direction (mph)

12
10
8
9
8
7
6
7
7
8
8
9
10
11
12
13
14
17
15
15
17
16
17
16

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

86
87
93
93
95
95
95
96
96
96
96
96
95
92
87
73
64
60
74
79
83
85
85
95

Pressure (mb)

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

Ozone (du)

392
391
392
386
384
384
376
371
365
360
357
352
350
348
348
348
347
343
339
339
340
342
344
349

Wednesday 3

Waning Gibbous 88%

00:15

07:49

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
18 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)

81
86
70
78
77
70
75
81
88
93
86
77
83
91
100
94
88
81
83
73
75
66
47
45

Low Clouds (% Sky Obscured)

67
68
50
58
59
57
59
61
63
63
64
58
71
83
81
78
62
60
64
64
60
55
44
41

Medium Clouds (% Sky Obscured)

59
69
51
49
46
41
51
56
45
23
10
3
68
83
100
86
75
67
71
17
15
13
11
13

High Clouds (% Sky Obscured)

19
12
10
7
3
0
30
57
85
68
51
26
55
78
95
77
56
36
40
10
15
11
5
0

ISS Passover

Visibility (miles)

9
8
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
5
7
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
Light Rain
Light Rain
None
None
None
None
None
None
None
None
None
None
None
Very Light Rain
None
None

Precipitation Probability (%)

25
31
11
11
9
1
33
51
75
67
48
6
9
10
6
25
31
40
48
48
51
53
47
36

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0.5
0.4
0
0
0
0
0
0
0
0
0
0
0
0.2
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

17
16
15
13
14
13
12
12
12
12
12
12
11
11
11
9
10
10
10
10
6
8
9
9

Relative Humidity (%)

98
98
93
93
96
95
95
95
93
95
93
92
89
86
80
70
70
64
62
61
46
52
59
64

Pressure (mb)

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

Ozone (du)

356
370
387
389
388
389
390
391
392
392
388
383
383
383
381
381
383
384
387
391
395
397
399
402

Thursday 4

Waning Gibbous 81%

00:38

09:04

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 OK
08 OK
09 OK
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 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)

53
62
80
70
75
76
84
91
99
85
67
52
30
34
38
55
71
87
92
96
100
92
85
77

Low Clouds (% Sky Obscured)

47
52
55
58
60
61
61
60
59
57
55
52
30
34
38
29
19
9
21
33
46
35
27
20

Medium Clouds (% Sky Obscured)

20
28
76
21
21
62
71
40
98
82
25
2
2
2
1
20
39
56
72
86
100
89
78
67

High Clouds (% Sky Obscured)

0
0
0
0
1
15
15
20
25
30
2
1
4
5
6
4
2
2
2
3
3
4
8
15

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
8
6
4
6
7
8
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

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
Very Light Rain
Very Light Rain
None
None

Precipitation Probability (%)

29
22
11
14
10
1
1
2
1
0
0
0
1
5
9
27
38
48
55
58
59
57
52
46

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

66
67
69
72
76
80
81
85
85
84
88
91
81
73
66
60
62
63
65
65
65
65
69
74

Pressure (mb)

1001
1002
1002
1003
1003
1003
1004
1004
1005
1005
1006
1006
1007
1009
1010
1010
1011
1011
1011
1012
1012
1012
1013
1013

Ozone (du)

404
405
405
407
405
406
407
407
405
405
404
404
402
401
399
398
399
400
401
404
408
411
409
407

Friday 5

Waning Gibbous 72%

00:55

10:19

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

Sun - Rise: 04:43, Set: 21:14, Transit: 12:59. Moon - Rise: 00:55, Set: 10:19. Civil Dark: 22:01 - 03:56. Nautical Dark: 23:12 - 02:44. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

67
54
43
28
15
1
13
26
39
46
57
64
73
87
100
100
100
100
100
99
99
96
93
90

Low Clouds (% Sky Obscured)

13
7
0
1
1
1
10
19
29
32
31
30
33
36
39
33
30
27
24
27
24
26
25
29

Medium Clouds (% Sky Obscured)

50
30
11
4
2
0
2
3
3
8
14
22
46
69
88
88
93
98
98
98
98
84
69
54

High Clouds (% Sky Obscured)

13
7
1
0
0
0
5
12
17
29
45
56
71
87
100
100
100
100
99
98
97
86
73
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 (%)

38
27
10
8
5
0
0
0
0
0
0
0
5
9
13
20
22
23
24
24
22
22
20
17

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

Chance of Frost

Temperature (°C)

15
14
13
11
11
10
10
10
9
9
10
11
11
13
14
16
16
17
17
18
18
18
18
18

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

78
80
84
87
87
87
88
90
91
93
91
88
87
79
74
67
66
66
65
65
64
65
65
66

Pressure (mb)

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

Ozone (du)

405
402
400
398
389
380
371
369
368
366
365
364
363
364
364
364
364
364
363
363
363
363
363
363

Saturday 6

Waning Gibbous 62%

01:09

11:35

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: 04:43, Set: 21:15, Transit: 12:59. Moon - Rise: 01:09, Set: 11:35. Civil Dark: 22:02 - 03:56. Nautical Dark: 23:14 - 02:43. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

92
94
98
98
99
99
99
98
96
96
98
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

22
13
3
2
1
0
5
10
14
11
8
6
13
18
24
18
19
19

Medium Clouds (% Sky Obscured)

37
19
1
6
10
24
38
44
45
45
50
50
55
67
74
82
92
99

High Clouds (% Sky Obscured)

68
78
98
98
98
98
98
98
96
96
98
100
100
100
100
70
43
20

ISS Passover

Visibility (miles)

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

Precipitation Type

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

Precipitation Probability (%)

14
10
1
3
1
0
0
0
0
17
28
40
50
59
69
84
91
89

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0.2
0.3
0.5
0.6
0.6

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

66
72
78
84
87
90
93
93
93
95
92
89
86
75
67
59
54
50

Pressure (mb)

1018
1019
1019
1019
1019
1019
1019
1019
1018
1018
1017
1017
1017
1016
1016
1016
1015
1015

Ozone (du)

363
362
362
361
360
359
357
356
355
354
354
353
353
351
349
347
344
341

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

Generated: 31/05/26 19:11:34. Forecast: 31/05/26 to 06/06/26. Timezone: UTC+1.00