Clear Outside v1.0 - International Weather Forecasts For Astronomers

Wednesday 27

Waxing Gibbous 89%

17:21

03:02

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

Sun - Rise: 04:50, Set: 21:04, Transit: 12:58. Moon - Rise: 17:21, Set: 03:02. Civil Dark: 21:49 - 04:05. Nautical Dark: 22:55 - 02:59. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

0
0
4
0
0
0
0
0
0
0
0
2
0
15
36
41
34
28
42
54
46
57
80
93

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
8
15
14
14
7
5
15
13
10
6
10

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
5
0
12
21
21
25
45
43
53

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
7
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 (%)

45
6
0
1
0
0
0
0
0
0
0
0
0
0
0
21
23
30
17
34
37
18
38
47

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

76
67
62
58
56
56
56
57
59
60
66
70
74
76
75
75
83
89
90
92
92
92
86
78

Pressure (mb)

1026
1026
1026
1026
1026
1026
1025
1025
1025
1025
1024
1024
1024
1024
1024
1024
1024
1024
1023
1023
1022
1022
1022
1022

Ozone (du)

330
331
331
333
333
332
332
331
331
331
330
330
332
334
334
335
334
333
332
333
334
336
339
338

Thursday 28

Waxing Gibbous 95%

18:35

03:18

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: 04:49, Set: 21:05, Transit: 12:58. Moon - Rise: 18:35, Set: 03:18. Civil Dark: 21:50 - 04:04. Nautical Dark: 22:57 - 02:57. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

100
98
92
100
100
100
100
75
74
98
100
100
100
100
96
80
94
100
98
100
100
94
71
100

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
3

Medium Clouds (% Sky Obscured)

10
0
3
38
50
44
68
75
74
24
92
98
96
76
88
30
52
19
15
74
25
33
71
95

High Clouds (% Sky Obscured)

82
73
92
100
100
100
100
67
40
90
98
57
82
100
91
69
83
100
98
100
100
89
61
96

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
6
8
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 (%)

18
12
2
0
1
0
0
0
0
0
0
3
18
27
26
6
0
0
0
0
16
23
26
27

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)

12
12
12
12
11
12
11
11
11
11
9
6
6
6
6
5
5
6
6
6
6
6
7
7

Chance of Frost

Temperature (°C)

21
23
25
27
29
29
28
29
29
28
27
26
24
22
21
20
20
19
18
18
17
16
18
18

Feels Like (°C)

19
21
24
26
28
28
27
28
28
27
26
25
23
21
20
20
19
18
17
17
15
15
16
17

Dew Point (°C)

15
15
16
17
19
17
16
16
17
17
18
18
16
16
16
16
16
15
15
15
14
15
15
14

Relative Humidity (%)

69
62
56
54
52
46
46
45
46
50
56
63
60
66
72
76
77
80
81
83
86
89
85
77

Pressure (mb)

1022
1022
1021
1021
1020
1020
1020
1019
1019
1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
1021

Ozone (du)

337
338
337
338
336
335
332
331
331
329
328
328
331
335
340
336
333
331
328
327
326
324
323
323

Friday 29

Waxing Gibbous 98%

19:49

03:38

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

100
92
85
100
93
100
86
76
70
70
68
48
35
72
87
60
33
42
35
30
30
30
45
71

Low Clouds (% Sky Obscured)

4
17
0
0
0
0
0
7
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

71
71
85
67
73
83
86
43
25
30
33
20
13
11
20
10
0
4
0
0
0
0
1
2

High Clouds (% Sky Obscured)

100
82
59
100
89
100
76
45
45
9
6
2
2
35
35
40
33
42
35
30
30
30
44
66

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 (%)

14
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1

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
9
9
9
10
10
10
10
10
8
6
6
6
6
5
5
5
4
3
3
2
1
2

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

19
19
20
20
21
21
22
21
22
21
21
21
18
16
14
13
13
12
12
11
11
12
14
16

Dew Point (°C)

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

Relative Humidity (%)

71
65
57
56
59
54
50
49
48
51
58
67
75
77
78
79
83
84
89
90
88
87
80
73

Pressure (mb)

1021
1021
1022
1021
1021
1022
1022
1021
1021
1022
1022
1022
1022
1022
1022
1022
1022
1022
1022
1022
1021
1021
1021
1021

Ozone (du)

323
323
324
324
326
329
334
336
338
338
338
337
336
336
336
336
336
337
336
337
337
338
338
338

Saturday 30

Waxing Gibbous 100%

21:01

04:06

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

96
82
65
53
69
85
100
100
66
52
42
85
77
83
92
100
100
100
100
100
100
100
98
97

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
14
26
38
39
44
41
53
72
65
57
50

Medium Clouds (% Sky Obscured)

6
5
46
40
53
75
100
91
60
47
41
33
20
19
19
84
92
92
51
81
99
100
98
96

High Clouds (% Sky Obscured)

91
75
60
44
61
80
100
98
66
52
42
57
36
60
80
100
100
100
100
100
100
100
78
47

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
12
16

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
3
4
6
7
8
8
8
9
9
9
7
7
7
8
8
7
9
8
7
8
8
8
10

Chance of Frost

Temperature (°C)

18
20
22
22
23
23
23
23
23
23
22
20
18
17
16
15
15
15
14
14
14
14
15
15

Feels Like (°C)

18
19
20
20
21
20
21
21
20
21
21
21
17
14
14
13
13
11
12
12
12
12
12
13

Dew Point (°C)

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

Relative Humidity (%)

66
59
50
51
48
49
48
47
48
49
60
69
73
73
72
72
68
67
71
79
82
79
78
78

Pressure (mb)

1021
1020
1020
1020
1019
1019
1019
1018
1018
1018
1017
1017
1018
1018
1018
1017
1017
1017
1016
1016
1016
1016
1016
1016

Ozone (du)

338
337
336
336
335
338
345
349
353
361
362
359
356
358
358
351
346
343
339
338
336
338
338
339

Sunday 31

Full Moon 99%

22:07

04:44

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: 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)

95
85
81
66
73
76
78
81
78
78
79
80
78
89
92
95
92
89
85
87
89
90
94
97

Low Clouds (% Sky Obscured)

40
35
37
37
39
43
46
51
58
65
61
57
53
64
75
86
87
87
85
85
83
80
82
85

Medium Clouds (% Sky Obscured)

94
83
81
41
69
72
71
30
36
40
39
39
38
25
13
2
2
1
0
9
19
28
33
40

High Clouds (% Sky Obscured)

20
0
0
0
0
0
0
0
0
0
0
0
0
23
50
80
58
35
14
25
34
48
67
88

ISS Passover

Visibility (miles)

9
9
9
9
6
4
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 (%)

21
18
15
26
34
29
19
10
10
8
5
1
0
0
1
0
0
0
0
1
3
6
31
44

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

74
66
56
54
59
70
71
66
66
64
68
73
79
83
86
89
89
87
84
83
80
79
78
83

Pressure (mb)

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

Ozone (du)

341
345
349
349
350
352
354
350
345
342
338
337
335
335
333
333
335
335
335
335
334
332
331
332

Monday 1

Waning Gibbous 97%

23:02

05:36

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: 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
97
94
90
94
97
100
100
100
100
97
98

Low Clouds (% Sky Obscured)

87
91
96
100
97
94
91
90
88
88
87
84
83
84
85
85
75
67
59
62
66
69
66
62

Medium Clouds (% Sky Obscured)

49
63
73
83
82
80
82
89
94
100
99
99
98
79
62
39
37
27
26
42
62
83
77
69

High Clouds (% Sky Obscured)

100
100
100
100
98
95
93
97
99
100
100
100
100
70
40
10
40
70
100
79
55
36
58
76

ISS Passover

Visibility (miles)

9
8
6
3
1
3
6
9
7
5
4
5
7
8
6
3
0
3
6
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
Very Light Rain
Very Light Rain
Very Light Rain
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
None
None
None
None
None
None
None
None

Precipitation Probability (%)

53
56
55
56
57
58
61
72
79
88
95
95
95
93
69
48
47
45
39
24
12
2
5
4

Precipitation Amount (mm)

0.2
0.3
0.3
0.2
0.3
0.3
0.3
0.4
0.4
0.5
0.8
0.9
0.9
0.7
0.3
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

90
96
96
95
95
95
95
96
95
96
96
96
96
98
98
98
98
96
96
96
93
93
92
82

Pressure (mb)

1012
1012
1012
1011
1011
1010
1010
1009
1009
1008
1007
1007
1007
1006
1006
1006
1005
1005
1005
1005
1004
1004
1004
1004

Ozone (du)

333
333
335
336
337
339
340
342
344
345
346
350
354
357
360
362
365
368
371
374
378
381
385
388

Tuesday 2

Waning Gibbous 93%

23:44

06:38

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

Sun - Rise: 04:45, Set: 21:11, Transit: 12:58. 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)

97
96
94
92
94
95
98
99
100
100
99
98
96
90
80
76
74
74
77
80
78
75

Low Clouds (% Sky Obscured)

59
57
55
53
52
52
50
59
69
78
72
70
66
62
61
61
64
67
66
68
67
67

Medium Clouds (% Sky Obscured)

41
30
24
18
28
37
51
63
61
64
60
56
44
27
20
14
18
19
16
9
3
0

High Clouds (% Sky Obscured)

87
58
29
0
0
1
1
34
66
99
95
91
87
63
39
16
14
14
9
5
2
0

ISS Passover

Visibility (miles)

9
9
9
9
9
7
5
3
3
3
3
5
7
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
Very Light Rain
Light Rain
Very Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
None
None
None
None

Precipitation Probability (%)

3
31
51
67
70
69
72
79
88
95
91
94
95
95
95
95
95
70
20
14
10
3

Precipitation Amount (mm)

0
0
0
0.3
0.4
0.3
0.4
0.5
0.6
0.7
0.6
0.6
0.6
1
1.3
1.7
0.9
0.4
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

75
67
69
73
76
76
74
73
78
83
86
89
92
92
93
95
96
95
95
93
93
92

Pressure (mb)

1004
1004
1004
1004
1004
1004
1004
1003
1003
1003
1003
1003
1002
1002
1001
1001
1001
1001
1002
1003
1004
1004

Ozone (du)

392
395
398
402
405
403
400
398
398
398
398
399
400
401
399
398
396
391
386
381
376
371

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

Generated: 27/05/26 09:50:52. Forecast: 27/05/26 to 02/06/26. Timezone: UTC+1.00