Clear Outside v1.0 - International Weather Forecasts For Astronomers

Saturday 23

First Quarter 53%

12:19

02:16

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

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)

30
27
29
49
36
46
52
43
45
57
99
98
90
72
99
100
100
63
11
0
0
0
3
1

Low Clouds (% Sky Obscured)

0
0
0
9
4
25
28
31
27
23
6
2
0
0
0
8
11
9
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

30
27
29
34
21
16
21
9
6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

0
0
0
0
0
3
0
2
25
57
84
81
90
70
91
100
100
63
11
0
0
0
3
1

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 (%)

17
38
7
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)

3
3
4
5
5
5
5
4
5
6
7
6
6
5
5
4
4
3
2
2
2
2
2
2

Chance of Frost

Temperature (°C)

16
18
19
20
21
22
24
25
25
26
26
26
26
25
24
21
20
18
17
16
15
14
14
14

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

90
85
82
77
69
63
60
57
54
53
54
56
59
68
75
81
86
88
88
87
89
90
92
93

Pressure (mb)

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

Ozone (du)

353
352
349
344
339
335
333
330
328
328
327
326
324
324
322
321
320
319
319
318
317
318
318
319

Sunday 24

Waxing Gibbous 64%

13:37

02:28

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

2
18
36
42
40
27
16
11
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Low Clouds (% Sky Obscured)

0
0
0
0
0
18
16
11
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
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

2
18
36
42
40
27
10
4
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 (%)

1
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
2
2
2
2
2
2
3
3
4
5
6
5
4
5
5
4
4
4
4
3
3
3
3

Chance of Frost

Temperature (°C)

14
15
17
19
22
24
25
27
28
28
29
29
29
28
27
23
21
19
18
17
17
16
16
16

Feels Like (°C)

16
18
20
21
23
25
27
29
30
30
30
30
30
30
29
25
24
22
21
19
19
18
18
18

Dew Point (°C)

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

Relative Humidity (%)

92
86
81
75
66
59
53
49
46
46
48
50
55
64
72
78
85
86
85
83
83
85
85
86

Pressure (mb)

1030
1031
1031
1031
1031
1031
1031
1031
1030
1030
1030
1030
1030
1030
1030
1030
1031
1031
1031
1031
1031
1031
1031
1031

Ozone (du)

318
318
318
319
320
320
320
320
321
323
322
320
320
319
319
318
317
317
315
313
314
313
314
315

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 OK

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
0
9
4
0
0
0
0
0
0
0
0
1
2
3
10
17

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
9
4
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
0
0
0
0
0
1
2
6
12

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
3
2
0
2

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

Chance of Frost

Temperature (°C)

16
18
20
23
25
27
29
30
31
32
32
31
30
29
27
24
22
21
20
19
19
18
18
18

Feels Like (°C)

18
20
23
26
28
30
31
32
33
33
33
33
32
31
29
26
23
22
21
21
20
20
20
20

Dew Point (°C)

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

Relative Humidity (%)

85
77
70
66
61
58
54
50
48
48
48
52
59
64
71
71
68
65
64
61
62
62
63
62

Pressure (mb)

1031
1031
1031
1031
1031
1031
1031
1030
1030
1029
1029
1029
1029
1029
1029
1030
1030
1030
1030
1030
1030
1029
1029
1029

Ozone (du)

316
316
318
318
317
319
320
321
323
322
321
320
320
320
320
321
321
320
320
319
319
319
320
321

Tuesday 26

Waxing Gibbous 82%

16:07

02:49

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

23
31
37
41
40
35
29
34
41
49
54
65
61
40
29
25
23
18
13
18
21
27
42
48

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
9
18
28
33
40
46
30
17
7
5
2
0
8
17
24
28
30

Medium Clouds (% Sky Obscured)

19
29
37
41
40
35
29
34
38
26
18
13
11
12
16
14
13
9
6
5
3
1
2
3

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2
2
2
2
0
0
25
48

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
4
6
20
8
9
4
10
9
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)

1
2
3
4
6
7
8
9
9
9
12
14
12
12
12
11
10
10
10
9
9
9
8
8

Chance of Frost

Temperature (°C)

18
19
21
23
24
26
26
27
27
28
27
26
25
23
21
19
17
15
13
12
11
10
10
10

Feels Like (°C)

20
22
23
25
26
27
28
29
29
29
27
25
23
22
21
18
16
14
12
11
10
9
8
9

Dew Point (°C)

12
12
12
13
14
15
16
17
18
18
20
21
20
19
17
15
13
12
10
9
8
7
6
5

Relative Humidity (%)

65
60
57
54
53
53
53
55
55
57
65
73
74
74
75
76
78
80
82
81
80
77
73
72

Pressure (mb)

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

Ozone (du)

323
323
323
323
323
323
324
323
322
320
320
319
319
318
318
319
320
322
324
324
325
326
326
328

Wednesday 27

Waxing Gibbous 89%

17:21

03:02

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

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)

68
79
84
80
77
77
76
74
73
78
71
63
54
43
37
22
3
0
0
15
30
45
30
15

Low Clouds (% Sky Obscured)

35
39
40
39
36
32
28
21
13
5
4
2
0
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

6
5
3
1
1
2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1

High Clouds (% Sky Obscured)

68
78
81
80
77
67
58
60
59
75
71
63
54
34
28
22
3
0
0
13
26
39
26
12

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)

9
11
11
11
12
12
12
13
13
13
13
12
11
10
8
7
6
5
4
4
4
4
4
4

Chance of Frost

Temperature (°C)

10
11
13
15
16
17
19
20
20
20
20
19
18
17
15
13
12
11
10
9
9
9
8
10

Feels Like (°C)

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

Dew Point (°C)

6
6
5
5
5
5
6
6
6
6
6
5
6
6
6
5
4
4
4
4
4
4
4
5

Relative Humidity (%)

72
67
59
51
48
45
42
41
39
39
39
39
44
50
53
57
61
64
66
67
70
73
75
74

Pressure (mb)

1031
1031
1031
1031
1031
1031
1031
1030
1030
1029
1029
1029
1028
1028
1027
1027
1027
1027
1027
1027
1026
1026
1025
1025

Ozone (du)

329
328
329
329
327
326
326
327
328
329
329
328
329
329
331
332
333
334
335
336
336
337
337
337

Thursday 28

Waxing Gibbous 95%

18:35

03:18

06 Good
07 Good
08 Good
09 OK
10 OK
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

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)

0
8
15
22
41
61
82
88
84
85
88
81
82
94
97
100
97
92
91
82
78
80
74
68

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
16
31
47
42
42
42
56
64
78
73
68

Medium Clouds (% Sky Obscured)

0
3
2
2
2
3
4
11
21
38
41
38
32
41
48
43
24
20
15
13
7
0
0
0

High Clouds (% Sky Obscured)

0
5
8
12
32
53
76
79
78
81
70
57
50
58
55
73
53
29
6
15
29
40
33
27

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
3
5
1
1
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
7
8
8
8
8
8
8
8
7
7
6
5
4
4
4
5
5
6
7
7
7

Chance of Frost

Temperature (°C)

11
12
14
17
19
21
23
24
25
26
26
25
24
24
21
19
17
17
16
15
15
14
14
15

Feels Like (°C)

7
7
12
13
15
15
17
17
25
25
24
25
25
25
22
22
23
21
20
20
15
14
13
14

Dew Point (°C)

6
7
7
7
7
6
6
6
6
7
7
9
10
12
10
9
8
7
7
6
6
5
5
6

Relative Humidity (%)

73
73
61
52
44
38
34
30
30
29
29
35
41
47
49
51
53
54
55
54
54
53
53
55

Pressure (mb)

1025
1025
1024
1024
1024
1023
1022
1022
1021
1020
1020
1019
1019
1019
1019
1019
1019
1018
1018
1018
1018
1017
1017
1017

Ozone (du)

338
339
341
342
344
342
340
338
338
338
337
335
334
332
332
332
332
333
335
336
336
335
335
334

Friday 29

Waxing Gibbous 98%

19:49

03:38

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

62
68
78
86
89
92
95
96
98
98
98
99
100
85
75
71
71
75
85

Low Clouds (% Sky Obscured)

62
62
65
68
69
69
74
81
83
85
64
52
44
42
36
33
27
31
35

Medium Clouds (% Sky Obscured)

0
3
6
8
13
13
22
25
18
8
14
23
30
35
47
57
59
66
68

High Clouds (% Sky Obscured)

21
20
9
9
11
13
15
20
24
24
43
70
100
85
75
71
63
32
4

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
8
7
5
7
8
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
1
2
16
21
16
21
20
17
16
20
21
18
13
13
23
32
40

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)

7
7
8
8
9
9
9
8
8
8
9
7
7
7
5
4
5
5
5

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

56
58
53
50
46
45
45
44
45
46
46
53
58
66
70
76
79
83
86

Pressure (mb)

1017
1017
1017
1016
1016
1016
1016
1016
1016
1016
1016
1016
1016
1017
1017
1017
1017
1017
1017

Ozone (du)

332
331
331
331
331
331
331
331
330
330
329
330
330
331
332
333
334
335
336

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

Generated: 23/05/26 06:30:30. Forecast: 23/05/26 to 29/05/26. Timezone: UTC+1.00