Clear Outside v1.0 - International Weather Forecasts For Astronomers

Friday 21

Waxing Gibbous 66%

16:43

23:18

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

Sun - Rise: 05:56, Set: 20:11, Transit: 13:03. Moon - Rise: 16:43, Set: 23:18. Civil Dark: 20:48 - 05:19. Nautical Dark: 21:34 - 04:33. Astro Dark: 22:27 - 03:39

Total Clouds (% Sky Obscured)

33
30
36
54
46
57
59
57
54
42
43
37
90
67
74
74
93
56
50
47
51
35
37
31

Low Clouds (% Sky Obscured)

5
13
23
37
27
35
36
35
29
21
36
37
70
67
71
74
80
56
43
21
35
34
7
10

Medium Clouds (% Sky Obscured)

29
25
22
21
21
17
21
27
21
18
8
0
39
21
23
22
39
17
18
38
47
35
37
31

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
2
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
7
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 (%)

2
1
0
0
0
0
0
0
0
1
2
3
4
1
3
4
4
7
23
24
17
1
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
6
6
8
8
8
10
10
9
9
9
9
9
9
9
7
8
11
13
11
12
10
10
9

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

90
92
93
95
93
88
80
70
59
48
42
37
34
35
35
36
38
46
55
74
83
81
77
80

Pressure (mb)

1011
1011
1011
1011
1011
1012
1012
1013
1013
1014
1014
1013
1013
1013
1014
1014
1014
1015
1016
1017
1018
1018
1018
1019

Ozone (du)

343
343
343
343
343
344
344
345
344
343
343
344
346
347
349
350
352
356
360
361
361
361
361
361

Saturday 22

Waxing Gibbous 75%

17:38

00:10

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

Sun - Rise: 05:57, Set: 20:09, Transit: 13:03. Moon - Rise: 17:38, Set: 00:10. Civil Dark: 20:45 - 05:21. Nautical Dark: 21:31 - 04:35. Astro Dark: 22:24 - 03:42

Total Clouds (% Sky Obscured)

15
7
4
2
0
3
0
4
45
48
66
60
59
64
62
35
22
39
38
11
10
7
0
2

Low Clouds (% Sky Obscured)

5
2
0
0
0
2
0
4
32
38
53
17
13
14
11
13
22
39
38
0
0
2
0
0

Medium Clouds (% Sky Obscured)

9
6
4
2
0
0
0
0
0
0
2
29
37
37
39
19
3
3
2
8
10
6
0
2

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
1
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

10
10
9
9
9
9
10
12
14
15
15
16
17
18
18
18
18
16
15
14
14
13
12
12

Dew Point (°C)

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

Relative Humidity (%)

84
87
88
87
84
80
67
59
50
43
39
35
32
31
30
30
32
37
43
45
53
55
59
60

Pressure (mb)

1019
1020
1020
1020
1021
1022
1022
1023
1023
1023
1023
1023
1022
1022
1023
1023
1023
1023
1024
1024
1024
1025
1025
1025

Ozone (du)

361
361
361
360
359
359
360
360
359
360
360
361
362
362
362
362
361
361
361
361
360
359
358
358

Sunday 23

Waxing Gibbous 83%

18:21

01:13

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

Sun - Rise: 05:59, Set: 20:07, Transit: 13:03. Moon - Rise: 18:21, Set: 01:13. Civil Dark: 20:43 - 05:23. Nautical Dark: 21:29 - 04:37. Astro Dark: 22:21 - 03:45

Total Clouds (% Sky Obscured)

0
17
33
26
21
28
26
31
43
48
62
42
25
37
40
36
33
22
16
7
5
4
3
8

Low Clouds (% Sky Obscured)

0
12
22
21
15
22
24
28
26
4
3
17
17
2
0
1
5
0
2
0
0
0
0
4

Medium Clouds (% Sky Obscured)

0
6
7
0
3
3
0
0
14
19
28
16
7
17
17
18
14
10
6
2
1
1
0
0

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2
1
2
2
3
4

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)

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

Chance of Frost

Temperature (°C)

12
12
12
11
11
12
14
16
18
20
21
22
23
23
23
23
23
22
20
18
17
16
15
14

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

63
64
66
68
71
66
58
53
47
43
38
33
29
28
27
26
26
29
35
46
50
56
55
59

Pressure (mb)

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

Ozone (du)

358
359
358
359
360
358
355
351
349
347
345
345
344
342
340
339
338
337
336
336
336
334
335
335

Monday 24

Waxing Gibbous 90%

18:51

No Set

02 Good
03 OK
04 OK
05 OK
06 Bad
07 OK
08 OK
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

Sun - Rise: 06:01, Set: 20:05, Transit: 13:03. Moon - Rise: 18:51, Set: No Set. Civil Dark: 20:41 - 05:24. Nautical Dark: 21:26 - 04:39. Astro Dark: 22:18 - 03:48

Total Clouds (% Sky Obscured)

15
21
25
29
54
36
39
44
54
82
94
91
87
84
89
95
100
100
67
51
100
100
100
100

Low Clouds (% Sky Obscured)

8
13
12
11
8
15
23
28
24
23
20
14
7
1
2
2
2
7
13
18
16
13
12
7

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
8
11
76
68
24
20
21
17
11
6
7
42
33

High Clouds (% Sky Obscured)

6
8
9
11
54
15
14
17
31
64
90
87
83
79
84
91
100
100
60
46
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
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
5
5
6
6
8
11
13
14
15
15
16
16
16
15
15
13
12
12
12
12
13
12

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

8
8
8
8
9
8
8
8
7
6
7
7
6
6
7
6
7
9
10
12
13
12
13
13

Relative Humidity (%)

65
71
74
76
77
72
62
54
45
40
39
37
35
36
38
39
43
51
62
73
82
82
83
83

Pressure (mb)

1024
1024
1024
1024
1024
1023
1023
1023
1022
1022
1021
1021
1020
1019
1018
1018
1018
1017
1017
1017
1017
1016
1015
1015

Ozone (du)

336
337
339
341
338
334
329
325
322
321
320
320
320
322
322
322
320
319
319
320
318
319
318
317

Tuesday 25

Waxing Gibbous 95%

19:14

02:25

02 Bad
03 Bad
04 Bad
05 Bad
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
01 Bad

Sun - Rise: 06:02, Set: 20:02, Transit: 13:02. Moon - Rise: 19:14, Set: 02:25. Civil Dark: 20:38 - 05:26. Nautical Dark: 21:23 - 04:41. Astro Dark: 22:14 - 03:50

Total Clouds (% Sky Obscured)

100
100
99
99
98
94
89
85
90
95
100
87
75
60
55
59
64
74
86
100
100
100
100
91

Low Clouds (% Sky Obscured)

3
0
2
4
11
23
65
64
66
57
34
28
21
15
5
3
2
3
4
6
31
57
82
65

Medium Clouds (% Sky Obscured)

11
12
17
93
98
94
89
85
90
81
54
45
35
23
14
10
11
29
44
56
76
89
100
76

High Clouds (% Sky Obscured)

100
100
98
96
94
79
63
44
61
79
97
71
44
23
34
46
56
69
83
100
100
100
100
87

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
7
5
3

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
1
1
1
1
2
1
4
11
12
16
10
1
2
1
0
4
6
8
23
30
34
36

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

79
80
80
82
79
75
68
64
61
57
54
53
48
44
39
41
43
45
53
61
73
74
77
79

Pressure (mb)

1014
1014
1013
1013
1013
1013
1013
1012
1012
1012
1011
1011
1011
1011
1010
1010
1010
1010
1010
1010
1010
1010
1010
1010

Ozone (du)

317
318
319
319
318
318
318
317
319
319
316
315
315
314
314
313
313
313
312
312
312
313
315
316

Wednesday 26

Waxing Gibbous 99%

19:31

03:41

02 Bad
03 Bad
04 Bad
05 Bad
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
01 Bad

Sun - Rise: 06:04, Set: 20:00, Transit: 13:02. Moon - Rise: 19:31, Set: 03:41. Civil Dark: 20:36 - 05:28. Nautical Dark: 21:21 - 04:43. Astro Dark: 22:11 - 03:53

Total Clouds (% Sky Obscured)

81
69
68
69
73
83
89
93
92
91
90
81
77
70
78
87
95
97
98
100
100
100
100
100

Low Clouds (% Sky Obscured)

49
32
32
34
34
43
52
60
51
41
31
33
35
37
30
21
6
5
6
6
15
22
37
81

Medium Clouds (% Sky Obscured)

47
21
25
30
36
36
25
17
12
7
2
2
1
0
5
6
10
12
14
21
38
66
82
82

High Clouds (% Sky Obscured)

74
61
61
66
72
64
38
5
32
59
87
74
63
51
69
84
95
97
98
100
100
100
100
100

ISS Passover

Visibility (miles)

5
7
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
Very Light Rain
Light Rain
Light Rain
Light Rain
Light Rain

Precipitation Probability (%)

41
47
44
36
13
22
26
29
28
21
0
1
1
0
0
2
2
35
50
61
95
95
95
95

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.2
1.1
1.7
2.2
1.6

Wind Speed/Direction (mph)

6
6
7
7
8
8
10
11
13
13
13
14
15
15
16
14
12
10
8
6
5
4
5
6

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

17
17
18
18
18
18
18
18
19
19
19
19
25
24
22
23
23
23
19
20
20
19
19
18

Dew Point (°C)

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

Relative Humidity (%)

82
83
88
90
90
93
85
75
68
58
50
42
42
41
40
42
43
43
48
52
57
64
72
79

Pressure (mb)

1010
1010
1010
1010
1010
1010
1011
1011
1011
1011
1011
1011
1011
1011
1011
1011
1011
1012
1012
1012
1012
1012
1011
1011

Ozone (du)

318
321
324
322
321
319
319
319
319
323
326
330
329
328
327
327
326
326
327
327
328
328
327
327

Thursday 27

Waxing Gibbous 100%

19:45

04:58

Sun - Rise: 06:05, Set: 19:58, Transit: 13:02. Moon - Rise: 19:45, Set: 04:58. Civil Dark: 20:34 - 05:30. Nautical Dark: 21:18 - 04:45. Astro Dark: 22:08 - 03:55

Total Clouds (% Sky Obscured)

Low Clouds (% Sky Obscured)

Medium Clouds (% Sky Obscured)

High Clouds (% Sky Obscured)

ISS Passover

Visibility (miles)

Fog (%)

Precipitation Type

Precipitation Probability (%)

Precipitation Amount (mm)

Wind Speed/Direction (mph)

Chance of Frost

Temperature (°C)

Feels Like (°C)

Dew Point (°C)

Relative Humidity (%)

Pressure (mb)

Ozone (du)

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

Generated: 21/08/26 02:17:09. Forecast: 21/08/26 to 27/08/26. Timezone: UTC+1.00