Clear Outside v1.0 - International Weather Forecasts For Astronomers

Thursday 21

Waxing Crescent 31%

09:28

01:46

06 OK
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 Good
20 Bad
21 Bad
22 OK
23 Good
00 Bad
01 Good
02 Good
03 Good
04 OK
05 Bad

Sun - Rise: 04:57, Set: 20:56, Transit: 12:57. Moon - Rise: 09:28, Set: 01:46. Civil Dark: 21:40 - 04:13. Nautical Dark: 22:41 - 03:11. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

42
52
65
96
100
100
100
100
95
80
100
100
92
10
98
100
20
0
88
8
0
0
19
73

Low Clouds (% Sky Obscured)

42
52
65
73
77
87
87
92
79
65
50
46
21
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

40
52
55
39
31
19
6
7
6
0
0
0
0
0
32
80
4
0
4
5
0
0
0
0

High Clouds (% Sky Obscured)

22
25
19
74
100
100
100
90
85
69
100
100
92
10
67
100
20
0
88
8
0
0
8
33

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
1
3
3
3
2
4
2
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)

6
7
8
11
11
10
10
10
9
8
8
8
8
8
7
6
5
5
5
5
5
5
5
6

Chance of Frost

Temperature (°C)

10
11
13
14
15
16
17
19
20
21
22
22
22
21
19
18
16
15
14
14
13
13
13
13

Feels Like (°C)

9
10
10
11
12
13
15
16
18
19
20
20
20
20
18
17
15
14
13
12
12
13
13
13

Dew Point (°C)

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

Relative Humidity (%)

95
87
82
78
76
79
78
69
65
64
64
63
66
70
75
79
82
82
80
82
84
86
89
89

Pressure (mb)

1026
1026
1026
1026
1027
1027
1026
1026
1026
1026
1025
1025
1025
1025
1026
1026
1026
1026
1026
1026
1026
1025
1025
1025

Ozone (du)

336
337
338
337
335
334
335
335
335
336
336
334
332
332
333
335
335
336
338
342
344
343
344
345

Friday 22

Waxing Crescent 42%

10:55

02:03

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

Sun - Rise: 04:55, Set: 20:57, Transit: 12:57. Moon - Rise: 10:55, Set: 02:03. Civil Dark: 21:41 - 04:12. Nautical Dark: 22:44 - 03:09. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

14
6
75
68
10
14
18
68
7
1
1
2
3
76
82
86
88
97
100
100
100
100
100
70

Low Clouds (% Sky Obscured)

0
0
0
0
0
5
3
0
0
0
0
0
0
0
0
0
0
0
6
0
0
0
3
24

Medium Clouds (% Sky Obscured)

6
0
4
0
0
0
0
0
0
0
0
0
0
14
36
36
41
19
20
74
37
39
70
65

High Clouds (% Sky Obscured)

6
6
42
55
10
14
18
58
7
1
1
2
3
62
36
50
55
86
100
100
100
100
100
35

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
2

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
Light Rain
Light Rain

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
13
23
77
81

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
0.7
0.8

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

13
14
17
19
21
22
24
25
25
26
26
25
25
24
22
20
19
19
18
17
17
16
16
16

Feels Like (°C)

13
15
17
19
20
21
22
22
24
24
25
25
24
23
22
21
20
19
18
17
17
16
16
16

Dew Point (°C)

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

Relative Humidity (%)

90
83
77
70
65
60
57
52
50
50
51
55
60
64
72
76
81
85
86
88
85
85
86
90

Pressure (mb)

1025
1026
1026
1026
1026
1025
1025
1025
1025
1024
1024
1024
1024
1025
1025
1025
1025
1025
1025
1025
1025
1025
1025
1025

Ozone (du)

345
344
344
343
343
342
340
339
339
340
341
339
339
338
338
338
337
336
335
335
336
337
338
341

Saturday 23

First Quarter 53%

12:19

02:16

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

Sun - Rise: 04:54, Set: 20:59, Transit: 12:57. Moon - Rise: 12:19, Set: 02:16. Civil Dark: 21:43 - 04:10. Nautical Dark: 22:46 - 03:06. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

59
56
83
92
79
86
88
73
63
64
58
40
43
57
66
70
43
56
44
29
19
6
13
22

Low Clouds (% Sky Obscured)

11
0
29
30
39
37
39
43
39
26
5
22
37
54
54
62
43
48
42
28
16
3
10
16

Medium Clouds (% Sky Obscured)

59
56
83
91
69
86
86
61
63
64
42
11
6
4
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

40
44
10
0
0
0
0
0
2
3
22
6
2
9
3
3
6
20
8
2
3
1
1
1

ISS Passover

Visibility (miles)

8
2
7
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

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

Precipitation Probability (%)

95
70
51
47
4
1
1
0
0
6
17
13
47
20
13
3
0
0
0
0
0
0
0
0

Precipitation Amount (mm)

1.1
0.4
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
2
3
4
4
4
5
5
5
6
7
7
5
4
4
4
4
4
4
4
3
2
3

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

17
18
19
20
21
23
23
24
25
25
25
26
26
26
25
23
21
21
18
18
18
18
17
17

Dew Point (°C)

14
15
16
16
16
16
16
16
17
17
18
18
19
20
20
19
18
16
16
15
14
14
14
14

Relative Humidity (%)

90
89
88
82
77
70
65
64
62
62
63
64
67
76
81
85
85
86
88
89
89
89
90
92

Pressure (mb)

1025
1026
1027
1027
1027
1027
1027
1027
1027
1027
1027
1027
1027
1027
1027
1028
1028
1029
1029
1029
1029
1029
1029
1029

Ozone (du)

346
352
352
349
348
346
340
336
333
331
326
325
323
321
321
321
321
322
322
322
322
322
321
320

Sunday 24

Waxing Gibbous 64%

13:37

02:28

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

Sun - Rise: 04:53, Set: 21:00, Transit: 12:57. Moon - Rise: 13:37, Set: 02:28. Civil Dark: 21:44 - 04:09. Nautical Dark: 22:48 - 03:04. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

30
24
19
16
29
38
50
21
22
24
24
14
8
6
4
2
1
1
1
0
0
0
1
0

Low Clouds (% Sky Obscured)

22
19
14
12
22
24
27
21
22
24
24
14
5
3
2
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
1
1
2
2
1
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

1
0
0
0
1
2
6
1
1
1
4
1
1
2
2
2
1
1
1
0
0
0
1
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
1
8
3
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)

3
3
3
3
3
3
3
2
2
3
3
3
4
5
6
6
6
5
4
3
3
3
3
2

Chance of Frost

Temperature (°C)

15
16
18
20
22
23
25
26
27
27
28
28
27
27
24
22
20
19
18
17
17
17
16
16

Feels Like (°C)

18
19
21
23
25
26
27
28
30
30
30
30
31
30
26
23
21
21
20
19
19
19
19
19

Dew Point (°C)

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

Relative Humidity (%)

92
89
85
80
73
67
60
55
50
49
48
52
58
70
77
78
80
80
80
81
83
86
89
90

Pressure (mb)

1029
1030
1030
1030
1030
1030
1030
1029
1029
1029
1028
1028
1028
1028
1028
1029
1029
1029
1029
1029
1029
1029
1029
1029

Ozone (du)

319
320
320
319
319
319
319
319
318
317
316
315
315
314
314
315
315
316
318
318
318
317
314
312

Monday 25

Waxing Gibbous 74%

14:53

02:38

06 Good
07 Good
08 Good
09 Good
10 Good
11 Good
12 Good
13 Good
14 OK
15 OK
16 OK
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

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
16
33
46
43
35
26
2
2
1
1
0
0
0
0
0
0
0

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
14
27
41
37
32
26
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
4
7
11
7
4
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
1
0
0
1
1
2
1
1
1
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
1
1
2
1
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
2
2
3
3
4
5
7
7
7
8
7
7
7
3
3
5
4
4
3
3
3
3
4

Chance of Frost

Temperature (°C)

17
18
20
22
24
26
28
29
29
30
30
30
29
28
25
23
21
20
19
18
17
17
16
16

Feels Like (°C)

20
22
24
26
28
30
30
31
31
32
32
32
31
31
28
27
27
26
25
24
18
18
18
17

Dew Point (°C)

16
15
17
17
18
18
18
19
19
20
20
21
21
22
20
19
18
17
17
16
15
15
14
13

Relative Humidity (%)

90
83
79
73
67
60
56
54
54
55
55
58
62
69
73
79
84
85
88
89
88
87
86
83

Pressure (mb)

1029
1029
1029
1029
1029
1029
1029
1028
1028
1028
1028
1028
1027
1027
1030
1031
1031
1031
1031
1031
1031
1031
1031
1031

Ozone (du)

312
314
315
316
316
315
313
313
313
313
313
314
313
312
311
310
309
309
309
309
310
310
311
312

Tuesday 26

Waxing Gibbous 82%

16:07

02:49

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

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
1
1
1
1
1
1
3
5
7
17
27
37
24
12
1
3
6
9
14
20

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
0
0
1
2
3
1
3
2
1
1
0

High Clouds (% Sky Obscured)

0
0
0
0
1
1
1
1
1
1
3
4
5
11
13
22
16
8
0
3
6
9
14
20

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)

5
5
6
6
6
7
7
8
9
10
10
10
9
9
8
6
5
5
5
4
4
4
4
4

Chance of Frost

Temperature (°C)

16
17
18
20
21
22
23
23
23
22
22
20
19
18
16
15
13
12
11
10
10
10
10
10

Feels Like (°C)

17
17
18
18
18
18
19
19
22
22
21
21
21
21
14
14
14
14
13
13
8
8
9
9

Dew Point (°C)

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

Relative Humidity (%)

81
78
74
69
65
60
56
53
54
54
54
58
59
62
67
74
80
83
84
87
84
82
81
76

Pressure (mb)

1031
1032
1032
1032
1032
1031
1031
1031
1031
1031
1031
1031
1031
1031
1031
1031
1031
1031
1031
1031
1031
1031
1030
1030

Ozone (du)

314
315
316
318
319
320
321
323
324
325
326
328
330
332
332
332
332
332
331
331
331
331
331
331

Wednesday 27

Waxing Gibbous 89%

17:21

03:02

06 OK
07 OK
08 Good
09 Good
10 Good
11 Good
12 Good
13 Good
14 OK
15 OK
16 OK
17 OK
18 OK
19 OK
20 OK
21 Good
22 OK
23 OK
00 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)

25
21
10
7
5
4
3
14
27
42
40
38
34
28
20
11
24
41
65

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
11
21
30
15
6
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

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

High Clouds (% Sky Obscured)

25
19
7
6
5
4
2
5
9
11
7
4
4
3
3
2
24
41
64

ISS Passover

Visibility (miles)

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

Precipitation Type

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

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)

4
4
4
5
6
6
6
7
7
7
7
7
7
7
5
5
7
6
5

Chance of Frost

Temperature (°C)

11
12
14
16
18
19
20
22
22
22
23
22
22
22
19
17
15
14
13

Feels Like (°C)

8
8
11
11
12
13
14
15
21
21
21
21
21
22
19
19
18
18
17

Dew Point (°C)

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

Relative Humidity (%)

73
69
62
56
51
50
49
47
48
48
49
53
57
62
63
67
71
71
71

Pressure (mb)

1030
1030
1030
1030
1030
1029
1029
1029
1028
1027
1027
1027
1026
1026
1026
1027
1027
1027
1027

Ozone (du)

331
330
329
328
327
326
325
323
323
323
323
323
323
324
324
325
326
327
329

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

Generated: 21/05/26 06:03:52. Forecast: 21/05/26 to 27/05/26. Timezone: UTC+1.00