Clear Outside v1.0 - International Weather Forecasts For Astronomers

Thursday 28

Waxing Gibbous 95%

18:35

03:18

12 OK
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 OK
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 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)

21
53
63
100
96
100
100
100
100
100
100
100
99
97
45
100
95
66
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

0
3
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)

3
25
63
79
96
87
48
32
99
98
98
95
79
87
45
13
82
14
15
23
95
78
81
100

High Clouds (% Sky Obscured)

21
53
63
100
66
93
96
100
100
100
91
100
46
92
42
100
92
62
91
100
100
100
100
100

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 (%)

6
0
0
0
0
0
1
26
5
2
3
4
3
0
0
0
3
1
6
27
36
23
8
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)

11
11
11
12
11
11
9
9
5
6
6
6
6
7
6
6
5
5
5
5
5
4
4
5

Chance of Frost

Temperature (°C)

29
30
30
29
29
28
27
26
24
23
22
21
21
21
19
19
17
16
16
17
18
19
21
22

Feels Like (°C)

28
29
28
28
28
27
27
26
23
22
21
20
19
19
17
17
16
15
15
17
17
18
20
21

Dew Point (°C)

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

Relative Humidity (%)

57
50
45
47
52
55
58
58
60
61
62
63
61
63
67
76
86
86
85
79
74
70
67
65

Pressure (mb)

1021
1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
1021
1021
1021
1021
1022
1022
1022
1022

Ozone (du)

340
339
338
335
333
332
329
328
327
329
334
337
336
334
333
329
328
327
326
327
325
324
324
323

Friday 29

Waxing Gibbous 98%

19:49

03:38

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

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
100
100
100
46
35
42
47
5
0
0
0
0
10
34
18
38
66
41
66
89
97
81
46

Low Clouds (% Sky Obscured)

0
0
0
14
19
28
31
22
0
0
0
0
0
10
16
8
9
26
14
0
0
0
0
3

Medium Clouds (% Sky Obscured)

100
100
100
59
15
3
5
15
3
0
0
0
0
0
12
2
0
0
0
4
19
18
27
18

High Clouds (% Sky Obscured)

100
100
100
100
28
35
42
47
5
0
0
0
0
4
2
18
38
66
41
66
79
94
67
37

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 (%)

16
9
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
9
9
8
9
8
6
4
4
4
4
5
5
5
5
5
4
3
2
2
3
3
3

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

59
53
54
59
57
54
57
64
72
77
80
77
81
86
86
82
79
79
79
74
71
63
58
53

Pressure (mb)

1022
1022
1022
1022
1022
1022
1022
1022
1022
1022
1023
1023
1023
1023
1023
1022
1022
1022
1022
1022
1022
1022
1021
1021

Ozone (du)

322
322
323
325
326
327
329
333
336
338
340
338
335
334
334
333
333
334
335
334
335
337
337
337

Saturday 30

Waxing Gibbous 100%

21:01

04:06

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

92
79
30
84
86
100
100
100
97
76
81
100
52
47
57
40
72
41
74
100
100
100
100
99

Low Clouds (% Sky Obscured)

4
5
0
0
0
0
1
0
0
0
0
0
0
0
15
28
61
39
30
32
43
59
42
35

Medium Clouds (% Sky Obscured)

29
52
30
71
32
23
50
73
80
76
81
93
20
22
22
11
15
0
0
12
23
48
52
88

High Clouds (% Sky Obscured)

82
62
24
31
61
100
100
100
90
41
48
98
24
0
0
0
60
15
72
100
100
100
70
40

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
1
3
5
1
1
0
0
0
0
1
15
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)

2
3
5
6
7
9
8
6
5
4
5
6
6
6
7
6
6
6
7
8
9
10
11
11

Chance of Frost

Temperature (°C)

24
25
25
26
26
25
24
23
22
20
18
17
16
15
15
14
13
13
13
14
16
17
17
18

Feels Like (°C)

24
24
24
25
24
24
23
23
22
20
17
16
14
15
14
14
13
12
13
13
13
14
15
16

Dew Point (°C)

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

Relative Humidity (%)

47
42
42
43
45
48
59
65
72
76
78
78
82
85
83
83
86
90
87
74
67
65
67
65

Pressure (mb)

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

Ozone (du)

335
335
335
336
335
334
335
338
343
350
356
360
366
370
373
374
372
360
353
351
348
347
343
342

Sunday 31

Full Moon 99%

22:07

04:44

12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 OK
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

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)

99
82
73
89
85
82
33
36
32
25
30
32
36
58
59
58
89
95
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

29
25
29
43
49
52
33
35
31
25
19
13
7
15
23
30
35
38
49
63
60
72
72
68

Medium Clouds (% Sky Obscured)

97
76
62
56
47
37
26
27
26
18
10
4
0
7
21
28
33
32
30
79
38
27
30
34

High Clouds (% Sky Obscured)

10
0
0
0
0
0
0
0
0
0
12
24
36
35
22
3
60
78
100
100
100
100
100
100

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
4
2
1
5
16
5
1
0
0
0
0
0
0
0
0
0
0
1
2
0
9
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
13
13
14
14
12
11
12
11
10
8
8
8
7
6
6
6
6
7
8
9
10
11
12

Chance of Frost

Temperature (°C)

19
20
20
21
20
20
20
19
18
17
15
14
13
13
12
12
12
12
12
13
14
16
17
17

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

55
53
50
50
59
64
62
64
70
74
80
84
87
90
93
93
93
95
90
82
78
72
68
68

Pressure (mb)

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

Ozone (du)

340
346
347
349
345
341
339
338
339
338
336
336
337
337
336
336
335
335
335
333
332
331
328
328

Monday 1

Waning Gibbous 97%

23:02

05:36

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: 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
91
82
75
78
82
88
83
77
71
77
82

Low Clouds (% Sky Obscured)

72
64
57
53
57
65
72
77
82
88
88
88
88
82
77
72
74
76
77
79
77
71
71
61

Medium Clouds (% Sky Obscured)

95
99
71
100
100
100
100
100
100
100
100
99
69
55
47
45
47
45
47
33
18
0
11
23

High Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
100
71
43
18
20
18
25
21
19
4
6
8

ISS Passover

Visibility (miles)

9
9
9
9
9
5
4
2
5
3
2
4
1
0
1
2
2
5
7
9
8
6
5
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
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
None
Very Light Rain
Very Light Rain
None
None
None
None
None
None
Very Light Rain
Very Light Rain
Very Light Rain

Precipitation Probability (%)

26
34
27
23
58
90
95
95
95
85
86
78
48
76
70
50
46
46
46
45
43
50
54
61

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

63
65
76
78
71
74
95
98
96
96
98
96
96
98
96
98
98
96
96
95
86
78
72
72

Pressure (mb)

1014
1013
1013
1012
1011
1011
1010
1009
1009
1008
1008
1007
1006
1005
1005
1004
1004
1004
1004
1004
1003
1003
1003
1003

Ozone (du)

331
331
332
335
338
338
338
341
345
348
352
357
362
367
368
368
369
374
379
383
389
394
400
400

Tuesday 2

Waning Gibbous 93%

23:44

06:38

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: 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)

84
81
77
72
70
67
66
65
69
64
62
60
67
61
55
44
46
52
53
66
87
87
89
88

Low Clouds (% Sky Obscured)

51
54
57
60
58
56
49
47
49
48
48
47
50
58
55
44
46
52
53
66
67
63
64
65

Medium Clouds (% Sky Obscured)

34
25
17
12
18
23
29
26
16
6
7
4
12
27
43
43
46
52
53
58
58
49
40
33

High Clouds (% Sky Obscured)

8
13
15
17
13
10
9
4
2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

ISS Passover

Visibility (miles)

4
3
3
3
4
5
7
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
7

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

Precipitation Probability (%)

76
85
95
95
95
94
87
69
50
32
25
19
3
4
2
0
1
1
0
20
30
38
42
50

Precipitation Amount (mm)

0.5
0.6
0.7
0.9
0.7
0.7
0.6
0.4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

74
77
76
74
74
77
81
85
87
90
93
93
93
95
95
96
96
93
90
87
80
75
68
75

Pressure (mb)

1003
1003
1003
1003
1003
1003
1003
1003
1004
1004
1005
1005
1005
1005
1005
1005
1004
1004
1004
1004
1004
1004
1004
1003

Ozone (du)

400
400
399
398
398
393
388
383
378
373
369
365
361
357
355
353
350
351
351
351
350
349
349
348

Wednesday 3

Waning Gibbous 88%

00:15

07:49

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 OK
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 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)

87
86
86
85
81
78
75
61
47
35
36
34
29
44
59
69
77
89
97

Low Clouds (% Sky Obscured)

67
67
67
65
62
60
58
52
45
35
28
16
4
24
44
64
66
68
70

Medium Clouds (% Sky Obscured)

26
48
67
80
57
39
16
11
5
0
1
2
4
7
12
19
42
63
77

High Clouds (% Sky Obscured)

0
1
1
1
1
1
1
0
0
0
0
0
1
6
11
12
17
19
37

ISS Passover

Visibility (miles)

5
2
2
1
1
4
6
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

Precipitation Type

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

Precipitation Probability (%)

64
78
84
85
73
63
55
48
40
25
19
13
0
1
1
0
11
15
19

Precipitation Amount (mm)

0.3
0.4
0.5
0.5
0.4
0.3
0.2
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

83
92
93
95
98
92
87
83
84
87
89
90
90
91
88
87
84
85
86

Pressure (mb)

1003
1002
1002
1002
1001
1001
1001
1001
1002
1002
1003
1003
1003
1003
1002
1002
1002
1001
1001

Ozone (du)

347
346
348
350
352
358
364
370
374
378
382
385
388
392
389
386
383
384
384

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

Generated: 28/05/26 12:02:47. Forecast: 28/05/26 to 03/06/26. Timezone: UTC+1.00