Clear Outside v1.0 - International Weather Forecasts For Astronomers

Wednesday 29

Full Moon 100%

21:08

No Set

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

Sun - Rise: 05:19, Set: 20:54, Transit: 13:07. Moon - Rise: 21:08, Set: No Set. Civil Dark: 21:36 - 04:40. Nautical Dark: 22:32 - 03:44. Astro Dark: 23:57 - 02:22

Total Clouds (% Sky Obscured)

0
0
2
0
0
2
0
4
10
29
38
54
69
57
24
21
25
52
60
23
23
49
44
75

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
1
11
15
0
15
10
11
14
15
16
19
9
0
10
10
13

Medium Clouds (% Sky Obscured)

0
0
2
0
0
0
0
0
0
0
6
21
17
12
4
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

0
0
2
0
0
2
0
4
8
10
7
19
25
25
7
3
6
31
41
13
23
39
36
58

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)

1
1
1
3
5
6
7
8
8
8
9
12
14
15
14
12
10
10
10
10
8
7
6
5

Chance of Frost

Temperature (°C)

16
16
18
21
23
26
28
29
31
32
33
33
32
32
31
28
26
24
22
21
20
19
18
18

Feels Like (°C)

19
19
20
23
25
26
28
29
30
31
31
30
28
26
26
25
25
23
20
19
19
18
17
16

Dew Point (°C)

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

Relative Humidity (%)

74
74
65
57
46
38
33
30
27
24
20
19
19
20
22
30
42
51
56
61
67
71
75
76

Pressure (mb)

1015
1015
1015
1015
1015
1015
1014
1014
1013
1012
1011
1011
1011
1011
1011
1011
1012
1013
1013
1013
1013
1013
1013
1014

Ozone (du)

328
328
330
328
326
322
321
321
320
318
319
320
320
321
322
323
322
320
319
319
321
323
323
326

Thursday 30

Waning Gibbous 98%

21:24

05:57

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

Sun - Rise: 05:21, Set: 20:53, Transit: 13:07. Moon - Rise: 21:24, Set: 05:57. Civil Dark: 21:34 - 04:41. Nautical Dark: 22:30 - 03:46. Astro Dark: 23:52 - 02:26

Total Clouds (% Sky Obscured)

80
66
72
66
52
99
88
100
79
82
100
100
100
41
33
26
36
87
100
90
56
25
32
1

Low Clouds (% Sky Obscured)

17
22
20
29
30
68
36
24
22
26
17
11
14
17
19
19
18
9
6
3
0
0
7
0

Medium Clouds (% Sky Obscured)

0
0
0
2
16
37
38
21
18
34
12
38
11
29
12
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

60
46
58
41
6
96
88
100
35
34
100
100
100
6
0
0
13
79
100
88
56
25
32
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 (%)

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
8
9
9
10
11
12
11
12
12
11
11
11
10
11
12
12
10
10
9
7
6

Chance of Frost

Temperature (°C)

17
17
18
19
21
22
23
24
25
26
27
27
27
26
25
24
22
19
18
16
15
14
13
13

Feels Like (°C)

17
18
18
20
20
21
21
21
21
22
22
23
22
21
22
22
18
16
13
12
11
11
10
9

Dew Point (°C)

14
14
14
13
13
13
12
7
6
6
5
2
-1
-1
1
2
5
5
3
3
4
5
5
6

Relative Humidity (%)

82
85
78
66
60
54
47
34
29
27
24
19
16
16
20
24
32
39
36
41
47
53
58
64

Pressure (mb)

1014
1014
1015
1015
1015
1016
1016
1015
1015
1015
1015
1015
1015
1015
1015
1016
1017
1018
1019
1019
1019
1019
1019
1019

Ozone (du)

329
329
329
329
329
329
330
330
329
332
335
336
338
339
340
340
337
337
337
338
338
339
341
342

Friday 31

Waning Gibbous 94%

21:37

07:14

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

Sun - Rise: 05:22, Set: 20:51, Transit: 13:07. Moon - Rise: 21:37, Set: 07:14. Civil Dark: 21:32 - 04:43. Nautical Dark: 22:28 - 03:48. Astro Dark: 23:47 - 02:31

Total Clouds (% Sky Obscured)

3
0
0
0
2
1
1
4
11
16
20
24
25
27
28
32
34
49
64
79
79
79
80
64

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
2
6
10
15
11
5
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
5
8
12
10
7
5
6
8
15
20
24
29
26

High Clouds (% Sky Obscured)

2
0
0
0
2
1
1
1
2
2
1
0
0
0
3
5
7
8
9
12
28
44
59
62

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)

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

Chance of Frost

Temperature (°C)

12
12
13
15
17
19
21
22
23
24
25
25
25
25
24
22
19
18
17
16
16
15
15
14

Feels Like (°C)

11
11
12
14
16
17
19
20
22
24
24
25
24
24
22
22
18
17
18
14
14
13
13
13

Dew Point (°C)

6
6
5
3
2
1
1
1
0
-1
-1
-1
-2
-3
-2
-1
6
9
7
6
7
8
6
5

Relative Humidity (%)

66
67
57
44
35
29
27
24
22
19
18
17
16
16
17
21
41
55
49
48
56
60
56
55

Pressure (mb)

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

Ozone (du)

342
341
341
342
343
343
343
342
342
343
344
347
348
348
347
347
346
345
344
344
345
353
361
356

Saturday 1

Waning Gibbous 88%

21:48

08:30

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

Sun - Rise: 05:24, Set: 20:49, Transit: 13:07. Moon - Rise: 21:48, Set: 08:30. Civil Dark: 21:30 - 04:45. Nautical Dark: 22:25 - 03:51. Astro Dark: 23:42 - 02:35

Total Clouds (% Sky Obscured)

54
54
49
45
40
42
44
39
42
48
100
50
52
47
55
65
53
62
86
74
95
94
92
95

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
5
11
16
12
7
4
5
1
0
0
0
0
0
0
0
12

Medium Clouds (% Sky Obscured)

24
22
25
24
24
25
27
28
28
28
27
25
27
29
29
25
20
14
22
21
25
24
27
28

High Clouds (% Sky Obscured)

54
38
25
16
8
6
8
2
16
32
100
40
42
42
47
63
53
48
73
45
86
85
82
88

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
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)

5
4
3
4
5
5
6
6
7
7
7
7
7
6
6
5
6
10
10
7
7
7
6
6

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

13
13
14
16
18
19
21
21
23
23
24
22
24
24
23
22
19
16
15
14
14
12
11
11

Dew Point (°C)

5
4
4
3
3
2
1
3
4
3
3
2
2
1
1
2
3
4
5
6
7
8
8
8

Relative Humidity (%)

53
52
46
39
35
28
25
26
26
23
22
21
20
20
21
25
30
35
41
47
53
57
60
64

Pressure (mb)

1017
1018
1018
1018
1018
1018
1018
1017
1017
1016
1016
1016
1015
1015
1015
1015
1016
1016
1016
1016
1016
1015
1015
1015

Ozone (du)

357
354
349
346
341
337
335
333
331
330
330
331
331
330
329
329
329
329
329
329
328
328
328
327

Sunday 2

Waning Gibbous 80%

21:59

09:46

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
02 Bad
03 Bad
04 Bad

Sun - Rise: 05:25, Set: 20:48, Transit: 13:07. Moon - Rise: 21:59, Set: 09:46. Civil Dark: 21:28 - 04:47. Nautical Dark: 22:23 - 03:53. Astro Dark: 23:38 - 02:39

Total Clouds (% Sky Obscured)

97
100
100
100
100
97
95
91
88
86
85
89
92
96
97
97
96
97
99
100
99
98
98
99

Low Clouds (% Sky Obscured)

25
35
0
0
0
0
0
0
0
0
0
0
1
1
1
1
2
12
25
37
38
40
47
52

Medium Clouds (% Sky Obscured)

30
31
45
48
51
60
69
80
87
86
85
89
88
85
84
82
80
85
90
96
95
93
92
93

High Clouds (% Sky Obscured)

94
100
98
97
94
88
81
73
59
42
30
44
62
81
86
92
96
97
96
95
91
82
69
64

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
Very Light Rain
Light Rain
Light Rain

Precipitation Probability (%)

4
5
0
1
1
6
6
1
2
1
0
1
2
2
5
9
11
19
28
39
46
58
69
82

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

14
15
15
17
19
20
22
24
25
26
27
27
26
25
24
23
21
20
19
19
18
18
18
18

Feels Like (°C)

11
11
12
13
13
14
14
15
16
24
23
23
24
24
24
20
19
19
18
17
15
14
14
15

Dew Point (°C)

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

Relative Humidity (%)

68
70
66
59
53
48
41
34
29
27
26
24
26
28
30
36
42
49
54
57
62
63
64
66

Pressure (mb)

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

Ozone (du)

326
327
328
328
327
327
327
327
327
327
326
326
326
327
327
328
329
331
330
329
328
328
327
327

Monday 3

Waning Gibbous 71%

22:11

11:03

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
02 Bad
03 Bad
04 Bad

Sun - Rise: 05:27, Set: 20:46, Transit: 13:07. Moon - Rise: 22:11, Set: 11:03. Civil Dark: 21:26 - 04:49. Nautical Dark: 22:20 - 03:55. Astro Dark: 23:34 - 02:43

Total Clouds (% Sky Obscured)

99
99
98
98
98
91
84
76
76
75
76
67
60
52
60
70
80
76
66
57
71
85
100
99

Low Clouds (% Sky Obscured)

60
69
61
57
45
46
43
42
43
42
44
42
40
40
45
49
53
35
18
0
2
4
7
21

Medium Clouds (% Sky Obscured)

94
95
87
80
74
71
68
64
58
53
47
38
29
20
22
23
25
15
8
0
18
40
64
67

High Clouds (% Sky Obscured)

58
49
61
76
87
58
29
0
0
0
0
3
4
3
4
6
15
26
36
48
66
83
99
92

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

Light Rain
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 (%)

81
71
60
44
25
23
15
2
3
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Amount (mm)

0.4
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
9
9
9
9
9
9
10
10
11
11
11
11
12
12
10
9
7
6
6
8
8
8
8

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

15
15
15
16
17
17
17
18
19
26
25
24
25
25
26
22
22
22
21
20
19
14
13
13

Dew Point (°C)

12
12
12
12
10
10
9
9
9
9
8
7
8
9
10
10
11
11
10
8
7
8
9
10

Relative Humidity (%)

67
68
68
59
51
44
40
37
34
32
30
28
31
34
38
43
48
53
54
52
53
59
67
75

Pressure (mb)

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

Ozone (du)

326
326
325
325
326
326
325
323
322
322
321
320
317
313
310
309
308
306
305
303
301
301
300
300

Tuesday 4

Waning Gibbous 71%

22:24

12:24

Sun - Rise: 05:29, Set: 20:44, Transit: 13:06. Moon - Rise: 22:24, Set: 12:24. Civil Dark: 21:24 - 04:50. Nautical Dark: 22:18 - 03:58. Astro Dark: 23:29 - 02:47

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: 29/07/26 04:39:15. Forecast: 29/07/26 to 04/08/26. Timezone: UTC+1.00