Clear Outside v1.0 - International Weather Forecasts For Astronomers

Monday 25

Waxing Gibbous 74%

14:53

02:38

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

Sun - Rise: 04:52, Set: 21:01, Transit: 12:57. Moon - Rise: 14:53, Set: 02:38. Civil Dark: 21:46 - 04:07. Nautical Dark: 22:50 - 03:02. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
30
32
17
0
0
0
0
0
0
0
0
0
0
0
0
0

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
30
30
16
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
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0

High 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

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)

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

Chance of Frost

Temperature (°C)

17
20
22
25
28
29
31
31
32
32
32
31
30
28
25
23
21
20
19
18
17
17
17
17

Feels Like (°C)

19
22
25
27
30
31
33
33
33
33
33
33
32
30
27
25
23
21
21
20
19
19
18
19

Dew Point (°C)

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

Relative Humidity (%)

73
68
61
53
49
45
42
40
40
42
49
54
59
63
66
69
75
77
78
76
76
76
77
78

Pressure (mb)

1031
1031
1032
1031
1031
1031
1030
1030
1030
1029
1029
1029
1029
1029
1030
1030
1030
1030
1029
1029
1029
1029
1028
1028

Ozone (du)

315
316
315
315
315
314
314
314
313
312
312
313
312
311
312
313
312
313
313
313
314
313
314
314

Tuesday 26

Waxing Gibbous 82%

16:07

02:49

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

Sun - Rise: 04:51, Set: 21:03, Transit: 12:57. Moon - Rise: 16:07, Set: 02:49. Civil Dark: 21:47 - 04:06. Nautical Dark: 22:53 - 03:00. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
3
49
40
36
49
85
47
48
45
44
56
41
48
58

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
10
35
2
2
12

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
1
29
19
18
26
33
25
25
22
18
23
25
25
22

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
2
0
50
0
0
0
0
0
0
0
2

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
8
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

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
1
8
30
12
19
1
2
3
2
5
7
5
4
3

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)

3
4
5
5
4
4
3
3
4
4
4
6
6
7
6
5
6
8
8
8
8
8
8
9

Chance of Frost

Temperature (°C)

19
22
24
26
29
30
32
32
33
33
32
32
31
29
25
22
21
19
18
17
16
15
14
14

Feels Like (°C)

21
23
26
28
30
32
34
34
35
35
35
34
34
31
27
24
23
20
19
18
17
16
15
14

Dew Point (°C)

14
14
14
14
14
14
14
14
15
17
18
21
23
22
18
14
13
13
14
15
15
14
13
13

Relative Humidity (%)

73
63
54
47
41
37
34
32
34
39
43
53
64
67
63
58
61
66
77
86
90
92
92
90

Pressure (mb)

1028
1028
1028
1028
1028
1027
1026
1026
1025
1025
1024
1024
1024
1024
1025
1025
1025
1026
1026
1026
1026
1026
1026
1027

Ozone (du)

316
318
318
319
319
320
321
321
321
320
321
321
323
323
325
328
328
329
329
328
326
326
325
325

Wednesday 27

Waxing Gibbous 89%

17:21

03:02

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

Sun - Rise: 04:50, 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)

62
30
36
29
18
5
0
0
0
0
13
11
29
65
54
70
70
28
48
64
77
72
82
73

Low Clouds (% Sky Obscured)

43
18
26
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)

14
4
8
9
0
0
0
0
0
0
5
4
12
14
4
1
9
0
6
13
25
34
79
61

High Clouds (% Sky Obscured)

16
9
7
12
13
5
0
0
0
0
0
0
0
50
35
60
65
28
48
64
77
64
46
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

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 (%)

3
3
3
1
0
0
0
0
0
0
0
0
1
14
2
0
0
1
13
21
22
20
20
14

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

Chance of Frost

Temperature (°C)

15
16
17
19
21
22
23
23
23
23
22
21
19
17
15
14
13
12
11
11
11
12
12
13

Feels Like (°C)

14
16
17
18
20
22
22
22
23
22
20
19
18
16
14
12
11
11
11
11
10
11
11
11

Dew Point (°C)

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

Relative Humidity (%)

84
79
76
71
66
63
62
62
61
62
62
63
64
65
66
67
66
68
73
79
83
86
87
83

Pressure (mb)

1027
1027
1028
1027
1027
1027
1027
1027
1026
1026
1026
1026
1026
1026
1026
1026
1026
1026
1025
1025
1025
1024
1024
1024

Ozone (du)

326
326
328
328
329
331
331
331
330
331
331
331
332
331
331
333
335
338
339
340
338
336
336
340

Thursday 28

Waxing Gibbous 95%

18:35

03:18

07 Bad
08 Bad
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: 04:49, 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)

67
62
58
72
87
100
100
96
100
85
93
84
60
96
100
100
100
100
100
100
100
100
99
100

Low Clouds (% Sky Obscured)

2
0
0
0
0
0
2
4
5
4
2
0
0
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

67
55
28
17
7
0
22
42
43
32
25
23
19
14
2
15
25
33
35
38
38
31
23
17

High Clouds (% Sky Obscured)

15
15
15
43
72
100
100
96
100
85
82
70
56
93
100
100
100
100
100
100
100
100
99
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 (%)

29
39
35
29
16
10
9
2
0
0
1
0
0
1
0
3
2
0
0
0
0
1
1
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)

11
11
12
12
12
11
12
11
11
12
10
8
7
6
7
7
6
5
5
5
6
7
7
7

Chance of Frost

Temperature (°C)

14
16
18
20
22
24
25
26
26
26
26
26
25
23
22
21
20
19
18
18
17
16
16
16

Feels Like (°C)

12
13
15
17
19
21
23
24
25
24
25
24
25
25
21
20
20
19
19
18
16
16
15
14

Dew Point (°C)

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

Relative Humidity (%)

78
69
61
56
52
49
50
52
52
50
51
57
62
69
73
79
85
91
92
92
90
87
87
85

Pressure (mb)

1024
1023
1023
1023
1023
1022
1022
1021
1021
1020
1020
1020
1020
1020
1020
1021
1021
1021
1021
1021
1021
1021
1021
1021

Ozone (du)

338
338
337
335
335
333
331
329
329
329
330
336
338
331
331
332
331
330
329
329
329
329
329
328

Friday 29

Waxing Gibbous 98%

19:49

03:38

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

87
72
60
54
44
33
46
59
73
80
90
100
98
99
100
98
96
93
96
98
100
78
57
36

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)

24
30
60
54
21
33
46
59
73
78
73
66
98
98
98
92
86
80
76
72
68
57
47
36

High Clouds (% Sky Obscured)

72
43
15
10
15
15
16
21
26
54
56
84
48
31
12
29
48
65
72
79
86
58
27
3

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 (%)

4
13
10
8
8
4
6
6
0
0
0
0
2
3
0
2
3
1
5
6
2
7
9
6

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)

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

Chance of Frost

Temperature (°C)

16
18
19
20
22
23
25
25
26
27
26
26
25
21
20
19
18
17
16
15
15
14
15
16

Feels Like (°C)

15
15
17
19
20
21
22
23
24
24
24
24
25
21
21
20
20
18
18
16
15
16
15
15

Dew Point (°C)

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

Relative Humidity (%)

75
67
63
61
56
53
51
51
51
50
52
55
63
66
71
77
79
82
86
87
89
90
87
86

Pressure (mb)

1022
1022
1022
1022
1022
1022
1022
1022
1021
1021
1021
1021
1021
1018
1018
1018
1018
1017
1017
1017
1016
1016
1015
1015

Ozone (du)

328
328
327
327
326
328
329
335
338
337
337
335
333
333
333
333
334
334
335
336
338
339
340
341

Saturday 30

Waxing Gibbous 100%

21:01

04:06

07 Bad
08 Bad
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: 04:47, 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)

42
48
54
60
66
71
80
90
100
100
100
100
100
100
100
98
95
94
87
85
87
89
92
94

Low Clouds (% Sky Obscured)

5
11
16
11
6
1
8
16
22
13
8
3
35
68
100
77
64
52
55
53
55
64
75
80

Medium Clouds (% Sky Obscured)

42
48
54
60
66
71
80
83
86
78
70
63
64
63
48
27
21
15
21
23
25
42
60
81

High Clouds (% Sky Obscured)

9
13
14
19
23
26
50
76
99
99
99
100
96
88
87
84
80
76
62
58
55
49
43
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 (%)

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

Precipitation Probability (%)

18
23
22
22
18
3
33
58
77
69
49
21
42
52
52
76
64
42
40
36
29
24
17
0

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

3
4
5
6
7
8
10
10
10
10
9
9
8
8
7
7
7
8
9
10
11
12
12
12

Chance of Frost

Temperature (°C)

16
18
20
21
23
24
25
23
21
20
20
21
21
20
18
17
16
16
16
15
15
15
14
14

Feels Like (°C)

15
17
18
18
19
20
20
24
23
23
21
19
18
20
20
20
19
19
18
16
15
15
15
15

Dew Point (°C)

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

Relative Humidity (%)

82
77
72
66
62
58
54
62
70
81
79
79
77
82
86
92
95
95
96
96
95
95
90
87

Pressure (mb)

1015
1014
1014
1013
1013
1012
1012
1011
1011
1010
1010
1010
1010
1010
1010
1010
1009
1009
1009
1009
1009
1009
1010
1010

Ozone (du)

342
342
342
341
341
340
339
338
338
338
340
342
345
347
350
353
352
351
350
351
352
353
352
350

Sunday 31

Full Moon 99%

22:07

04:44

07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
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

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)

94
94
94
74
54
34
37
41
41
52
63
74
62
51
40
60
80
100

Low Clouds (% Sky Obscured)

73
70
67
52
37
23
25
25
26
14
6
0
6
12
19
16
17
18

Medium Clouds (% Sky Obscured)

59
38
16
14
8
2
4
7
9
18
30
40
32
29
20
23
29
32

High Clouds (% Sky Obscured)

32
13
13
13
13
14
15
13
9
25
44
64
44
24
4
36
68
100

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
None
None
None
None
None

Precipitation Probability (%)

4
9
1
5
8
7
11
12
5
7
7
13
21
24
18
17
11
0

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

14
15
17
18
19
20
21
21
21
21
21
20
19
18
17
15
15
14

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

84
78
72
65
62
59
55
54
53
51
57
60
67
73
83
93
95
95

Pressure (mb)

1011
1011
1011
1012
1012
1012
1012
1012
1012
1013
1013
1013
1013
1013
1014
1014
1014
1014

Ozone (du)

348
347
346
345
346
348
349
349
350
351
351
351
352
351
351
350
349
349

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

Generated: 25/05/26 07:39:56. Forecast: 25/05/26 to 31/05/26. Timezone: UTC+1.00