Clear Outside v1.0 - International Weather Forecasts For Astronomers

Tuesday 28

Waxing Gibbous 100%

20:48

No Set

04 OK
05 OK
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 OK
22 OK
23 Good
00 Good
01 Good
02 Good
03 Good

Sun - Rise: 05:18, Set: 20:56, Transit: 13:07. Moon - Rise: 20:48, Set: No Set. Civil Dark: 21:38 - 04:36. Nautical Dark: 22:35 - 03:41. Astro Dark: 00:02 - 02:17

Total Clouds (% Sky Obscured)

9
16
46
84
95
97
98
97
97
98
61
96
95
87
79
79
100
47
20
1
2
2
3
2

Low Clouds (% Sky Obscured)

4
10
14
20
23
21
30
38
34
39
33
11
17
11
20
20
9
0
9
0
0
0
0
0

Medium Clouds (% Sky Obscured)

9
16
17
55
73
81
91
87
78
82
44
95
92
79
66
40
32
16
3
1
1
0
0
0

High Clouds (% Sky Obscured)

4
16
46
52
65
66
42
40
33
2
2
17
20
10
12
25
100
35
2
0
2
2
2
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
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
4
6
9
9
9
9
9
9
9
9
8
8
8
9
9
9
8
6
5
4
4
4

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

18
17
17
17
18
20
21
22
24
25
26
28
28
28
28
27
26
24
22
23
22
21
20
20

Dew Point (°C)

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

Relative Humidity (%)

93
93
92
85
76
68
59
52
44
40
36
33
31
30
30
32
37
42
50
58
63
66
68
70

Pressure (mb)

1020
1019
1019
1020
1020
1020
1020
1020
1019
1019
1018
1018
1017
1016
1016
1016
1016
1016
1017
1017
1017
1016
1016
1015

Ozone (du)

322
322
321
321
320
320
319
318
319
320
322
323
323
323
322
322
324
326
330
329
328
328
330
330

Wednesday 29

Full Moon 100%

21:08

04:41

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

Sun - Rise: 05:19, Set: 20:54, Transit: 13:07. Moon - Rise: 21:08, Set: 04:41. Civil Dark: 21:36 - 04:38. Nautical Dark: 22:32 - 03:44. Astro Dark: 23:57 - 02:22

Total Clouds (% Sky Obscured)

3
8
5
3
0
0
0
2
2
10
21
39
50
46
23
43
25
49
30
44
38
35
28
5

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
6
15
16
18
0
17
12
12
18
0
10
6
0
4
4

Medium Clouds (% Sky Obscured)

0
4
3
2
0
0
0
0
0
0
0
22
21
25
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

2
1
0
0
0
0
0
2
2
2
0
0
6
2
0
35
11
30
30
25
30
35
21
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)

3
3
3
3
4
5
6
7
8
8
9
10
12
13
14
13
12
10
10
9
9
8
7
6

Chance of Frost

Temperature (°C)

17
17
17
18
21
23
25
27
29
30
31
32
32
32
31
29
27
24
23
21
20
19
18
17

Feels Like (°C)

19
19
19
20
22
24
26
27
29
29
31
31
30
29
27
25
23
23
20
19
18
17
17
17

Dew Point (°C)

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

Relative Humidity (%)

73
74
73
64
54
44
36
32
29
27
24
20
19
19
20
21
30
44
52
56
59
64
70
77

Pressure (mb)

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

Ozone (du)

332
332
333
331
328
325
324
322
322
322
322
323
324
324
325
324
325
324
323
322
322
323
324
325

Thursday 30

Waning Gibbous 98%

21:24

05:57

04 OK
05 OK
06 OK
07 OK
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 Good
00 OK
01 Good
02 Good
03 Good

Sun - Rise: 05:21, Set: 20:53, Transit: 13:07. Moon - Rise: 21:24, Set: 05:57. Civil Dark: 21:34 - 04:40. Nautical Dark: 22:30 - 03:46. Astro Dark: 23:52 - 02:26

Total Clouds (% Sky Obscured)

20
21
28
35
58
52
94
85
83
84
88
81
66
53
40
26
42
47
54
15
21
15
9
2

Low Clouds (% Sky Obscured)

15
13
18
17
32
40
73
76
73
52
76
49
31
25
9
21
24
6
4
9
15
10
5
0

Medium Clouds (% Sky Obscured)

0
0
16
18
17
19
33
24
16
20
16
14
66
46
15
0
11
19
22
0
0
0
1
1

High Clouds (% Sky Obscured)

0
2
2
2
41
2
43
22
26
30
30
35
40
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
1
2
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
6
5
6
7
8
10
11
11
9
11
13
12
12
11
11
10
8
8
9
9
8
7
6

Chance of Frost

Temperature (°C)

17
16
16
17
19
20
22
22
22
24
26
25
26
26
25
24
23
21
19
18
16
15
14
13

Feels Like (°C)

18
17
16
18
19
20
21
20
20
22
23
21
21
21
21
21
19
18
17
15
14
13
13
12

Dew Point (°C)

13
13
13
13
12
12
12
12
12
11
9
7
3
-1
-2
-1
2
3
4
7
6
6
6
7

Relative Humidity (%)

81
83
86
79
64
60
55
53
52
43
34
31
22
17
17
19
25
31
37
50
51
53
59
64

Pressure (mb)

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

Ozone (du)

326
326
327
328
329
329
330
331
330
331
333
335
337
341
344
345
344
344
345
345
346
347
348
351

Friday 31

Waning Gibbous 94%

21:37

07:14

04 Good
05 Good
06 Good
07 Good
08 Good
09 Good
10 Good
11 Good
12 OK
13 OK
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

Sun - Rise: 05:22, Set: 20:51, Transit: 13:07. Moon - Rise: 21:37, Set: 07:14. Civil Dark: 21:32 - 04:41. Nautical Dark: 22:28 - 03:48. Astro Dark: 23:47 - 02:31

Total Clouds (% Sky Obscured)

2
1
0
0
0
0
7
14
23
36
57
84
61
69
58
73
86
100
96
91
80
73
82
100

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
6
12
17
11
6
0
2
2
2
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

1
0
0
0
0
0
0
0
0
3
6
11
10
9
8
10
27
10
15
19
24
25
27
82

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
1
2
12
37
71
42
47
54
73
86
100
94
83
69
61
73
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)

6
6
6
5
6
6
5
5
5
6
7
7
6
6
6
7
7
7
7
6
6
7
6
6

Chance of Frost

Temperature (°C)

12
12
12
13
15
17
19
20
22
23
24
24
25
24
24
24
22
21
19
18
17
16
15
14

Feels Like (°C)

11
11
11
12
14
16
18
19
21
22
22
22
21
22
20
20
18
17
14
14
13
12
12
12

Dew Point (°C)

7
7
7
5
5
3
2
2
2
1
0
0
0
-1
-1
0
1
2
4
4
3
3
4
5

Relative Humidity (%)

67
70
70
60
49
39
33
29
26
23
21
20
19
19
19
21
25
29
36
40
40
41
46
51

Pressure (mb)

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

Ozone (du)

354
353
354
355
357
358
358
358
357
355
350
345
340
337
334
332
331
331
331
331
331
330
329
329

Saturday 1

Waning Gibbous 88%

21:48

08:30

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

Sun - Rise: 05:24, Set: 20:49, Transit: 13:07. Moon - Rise: 21:48, Set: 08:30. Civil Dark: 21:30 - 04:43. Nautical Dark: 22:25 - 03:51. Astro Dark: 23:42 - 02:35

Total Clouds (% Sky Obscured)

100
55
47
46
40
32
37
35
32
50
69
86
77
68
57
17
27
42
45
52
46
54
73
94

Low Clouds (% Sky Obscured)

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

Medium Clouds (% Sky Obscured)

79
7
0
2
4
5
4
7
7
9
9
11
13
16
19
1
2
3
5
6
8
5
3
2

High Clouds (% Sky Obscured)

73
43
42
39
33
22
19
12
4
24
39
62
48
34
17
17
27
42
43
39
35
47
65
90

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

11
11
13
14
16
18
20
21
22
23
24
25
25
25
24
24
23
22
22
20
20
19
12
11

Dew Point (°C)

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

Relative Humidity (%)

57
64
68
59
50
42
33
27
24
23
22
21
20
20
20
22
24
28
32
37
42
47
53
57

Pressure (mb)

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

Ozone (du)

329
330
332
334
335
338
336
334
334
333
333
333
333
332
332
331
331
331
331
331
332
332
332
332

Sunday 2

Waning Gibbous 86%

21:59

09:46

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

Sun - Rise: 05:25, Set: 20:48, Transit: 13:07. Moon - Rise: 21:59, Set: 09:46. Civil Dark: 21:28 - 04:45. Nautical Dark: 22:23 - 03:53. Astro Dark: 23:38 - 02:39

Total Clouds (% Sky Obscured)

96
98
99
92
86
84
77
69
62
58
54
46
55
66
73
56
43
32
22
12
1
1
2
2

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
1
3
7
7
6
3
5
9
13
9
4
0
0
0
0

Medium Clouds (% Sky Obscured)

5
7
10
9
13
20
20
20
21
26
32
38
29
19
10
8
5
3
2
1
0
0
0
0

High Clouds (% Sky Obscured)

93
96
99
68
36
5
6
7
18
19
18
13
26
39
47
35
25
11
8
5
1
1
2
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
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
8
8
7
7
7
8
7
6
6
5
4
3
5
8
11
10
9
9
8
7
7
6
6

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

11
11
10
10
11
12
13
14
15
16
24
24
23
24
25
26
24
23
22
20
19
18
14
14

Dew Point (°C)

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

Relative Humidity (%)

62
65
68
70
60
50
42
37
32
27
24
23
20
23
27
31
37
46
55
60
66
73
78
83

Pressure (mb)

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

Ozone (du)

332
333
334
334
334
334
334
333
332
331
330
329
329
328
327
327
327
327
328
328
329
329
329
329

Monday 3

Waning Gibbous 80%

22:11

11:03

04 Good
05 Good
06 Good
07 OK
08 OK
09 Bad
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

Sun - Rise: 05:27, Set: 20:46, Transit: 13:07. Moon - Rise: 22:11, Set: 11:03. Civil Dark: 21:26 - 04:47. Nautical Dark: 22:20 - 03:55. Astro Dark: 23:34 - 02:43

Total Clouds (% Sky Obscured)

6
11
15
32
44
54
42
46
50
63
79
93
92
93
92
96
98
100
98
95
93

Low Clouds (% Sky Obscured)

0
1
1
1
0
0
0
0
0
6
11
18
24
27
31
37
47
57
68
79
91

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
12
24
41
46
40
35
30
30
25
23
24
22
45
67
90

High Clouds (% Sky Obscured)

6
10
14
32
44
54
42
46
50
63
79
93
92
93
91
89
85
82
79
79
76

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

Fog (%)

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

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
3
5
7
13
17
21
31
40
45
43
38
23

Precipitation Amount (mm)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

15
14
14
14
16
17
18
18
19
20
24
22
20
20
20
20
16
16
15
15
15

Dew Point (°C)

13
12
12
12
11
10
9
8
7
7
5
4
3
2
2
1
2
3
3
5
7

Relative Humidity (%)

89
86
84
82
64
51
41
36
33
30
28
27
25
25
25
26
29
33
37
43
51

Pressure (mb)

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

Ozone (du)

329
328
327
326
326
325
325
324
323
323
322
322
322
322
323
324
325
325
326
328
329

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

Generated: 28/07/26 04:25:12. Forecast: 28/07/26 to 03/08/26. Timezone: UTC+1.00