Clear Outside v1.0 - International Weather Forecasts For Astronomers

Monday 27

Waxing Gibbous 97%

20:21

No Set

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

Sun - Rise: 05:16, Set: 20:57, Transit: 13:07. Moon - Rise: 20:21, Set: No Set. Civil Dark: 21:39 - 04:34. Nautical Dark: 22:37 - 03:37. Astro Dark: 00:08 - 02:12

Total Clouds (% Sky Obscured)

19
15
17
6
15
15
31
37
31
30
39
28
28
29
14
50
60
44
52
44
62
57
44
17

Low Clouds (% Sky Obscured)

0
6
8
5
10
9
25
29
23
22
27
19
19
21
6
50
60
16
21
21
13
12
16
6

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
4
10
20
14
16
3
7
14
16
5

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
2
9
6
8
2
3
40
42
9
3

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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

79
80
86
87
79
69
60
52
45
39
35
31
29
28
29
32
35
42
51
59
64
70
73
74

Pressure (mb)

1014
1014
1015
1015
1016
1017
1017
1018
1018
1018
1018
1018
1017
1017
1017
1017
1017
1018
1018
1019
1019
1020
1020
1020

Ozone (du)

335
334
334
333
333
333
333
332
332
331
331
332
332
332
331
331
331
331
330
331
331
329
328
326

Tuesday 28

Waxing Gibbous 100%

20:48

03:27

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

Sun - Rise: 05:18, Set: 20:56, Transit: 13:07. Moon - Rise: 20:48, Set: 03:27. Civil Dark: 21:38 - 04:36. Nautical Dark: 22:35 - 03:39. Astro Dark: 00:02 - 02:17

Total Clouds (% Sky Obscured)

32
53
40
59
53
81
87
93
87
78
86
91
82
97
91
100
65
100
74
47
48
43
23
7

Low Clouds (% Sky Obscured)

4
4
5
13
13
3
14
14
41
20
21
12
0
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

21
33
17
28
20
50
80
89
64
65
68
78
82
84
75
66
52
74
60
34
34
31
18
5

High Clouds (% Sky Obscured)

2
8
6
7
17
33
27
44
5
3
36
40
35
85
83
100
26
100
30
2
1
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
1
1
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
5
7
9
10
9
9
9
9
8
8
7
7
8
8
8
7
5
4
4
4

Chance of Frost

Temperature (°C)

17
16
16
15
17
19
21
23
24
25
27
28
28
29
29
29
28
26
24
23
21
20
19
18

Feels Like (°C)

18
18
17
17
18
19
20
21
22
24
26
26
26
27
27
27
26
25
22
21
22
21
20
19

Dew Point (°C)

13
13
12
12
12
13
13
13
13
11
11
10
9
9
9
8
8
8
9
10
11
11
10
10

Relative Humidity (%)

77
79
80
78
71
67
61
54
48
41
36
32
30
29
28
28
28
31
37
45
51
54
55
57

Pressure (mb)

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

Ozone (du)

324
325
325
325
324
322
321
320
319
319
319
319
319
319
319
320
320
320
321
323
324
324
324
326

Wednesday 29

Full Moon 100%

21:08

04:41

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

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 - 03:41. Astro Dark: 23:57 - 02:22

Total Clouds (% Sky Obscured)

2
3
3
0
0
0
0
0
0
4
24
35
52
45
46
39
71
52
33
62
51
38
51
65

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
3
22
30
24
26
25
19
13
5
4
0
0
0
0
0

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
16
5
1
1
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

2
2
2
0
0
0
0
0
0
0
0
2
2
14
26
19
53
49
33
62
51
36
48
61

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
4
3
2
2
3
3
4
5
7
8
8
8
7
12
12
12
10
8
7
8
7
7
7

Chance of Frost

Temperature (°C)

18
17
16
16
18
21
23
25
27
29
30
31
32
32
33
32
31
29
27
24
23
21
20
19

Feels Like (°C)

18
18
18
18
20
23
25
27
28
29
30
31
31
32
29
27
26
26
24
21
20
18
19
19

Dew Point (°C)

10
10
10
9
9
8
8
8
8
8
8
7
6
5
2
2
4
5
6
9
11
11
10
11

Relative Humidity (%)

59
62
64
62
53
44
36
32
28
26
24
22
20
18
14
15
17
21
26
37
48
51
54
61

Pressure (mb)

1016
1015
1015
1015
1015
1015
1014
1014
1014
1013
1013
1012
1012
1011
1010
1010
1011
1011
1011
1012
1012
1012
1012
1012

Ozone (du)

328
329
331
331
331
328
325
325
325
327
327
325
324
324
326
328
329
328
327
327
328
327
327
328

Thursday 30

Waning Gibbous 98%

21:24

05:57

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
02 Bad

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 - 03:44. Astro Dark: 23:52 - 02:26

Total Clouds (% Sky Obscured)

98
83
73
62
75
86
96
87
59
49
59
80
83
99
99
66
99
99
100
100
100
100
85
70

Low Clouds (% Sky Obscured)

0
0
0
0
11
22
36
36
33
28
27
27
23
19
51
12
8
4
0
4
8
13
9
5

Medium Clouds (% Sky Obscured)

0
0
0
0
4
5
6
61
6
8
10
17
27
27
27
27
30
28
30
17
44
65
65
65

High Clouds (% Sky Obscured)

98
83
73
62
75
86
92
68
26
7
27
64
68
96
93
51
96
98
100
100
100
100
85
66

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
7
6
7
8
9
10
11
12
12
13
13
13
14
16
15
15
13
11
10
9
8
6
5

Chance of Frost

Temperature (°C)

18
17
17
17
17
19
21
23
24
26
27
27
28
28
27
25
24
22
21
19
18
17
16
15

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

69
73
77
78
73
64
56
43
35
31
30
30
29
30
33
36
37
37
32
31
38
44
43
43

Pressure (mb)

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

Ozone (du)

327
326
325
326
327
327
327
327
327
325
326
327
328
332
333
333
330
331
331
331
331
333
334
335

Friday 31

Waning Gibbous 94%

21:37

07:14

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

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 - 03:46. Astro Dark: 23:47 - 02:31

Total Clouds (% Sky Obscured)

55
50
50
55
55
13
20
30
40
54
53
50
44
43
42
41
39
52
65
58
49
47
38
20

Low Clouds (% Sky Obscured)

0
3
19
0
5
11
14
12
10
11
15
16
18
13
8
5
27
46
65
47
28
10
8
4

Medium Clouds (% Sky Obscured)

55
50
50
55
0
0
0
3
10
15
15
13
13
14
15
17
19
22
25
26
25
26
14
5

High Clouds (% Sky Obscured)

55
50
50
55
53
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
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
4
5
5
4
5
6
7
8
9
9
9
9
9
8
7
7
8
8
8
8
9
10
9

Chance of Frost

Temperature (°C)

15
14
14
14
15
16
18
20
21
22
23
24
25
25
25
25
24
23
21
20
18
17
15
14

Feels Like (°C)

12
12
12
12
12
15
18
20
20
21
21
22
23
23
23
23
23
22
21
20
20
19
19
12

Dew Point (°C)

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

Relative Humidity (%)

42
44
47
47
45
43
39
35
31
28
25
23
22
21
21
21
22
25
27
31
35
41
47
50

Pressure (mb)

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

Ozone (du)

336
337
338
341
342
346
345
348
348
347
347
349
351
351
351
353
354
355
355
355
355
355
356
356

Saturday 1

Waning Gibbous 94%

21:48

08:30

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

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 - 03:48. Astro Dark: 23:42 - 02:35

Total Clouds (% Sky Obscured)

0
0
0
0
1
1
2
7
14
20
24
28
30
34
41
51
56
56
54
46
38
30
32
40

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
1
3
7
6
4
1
1
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
3
6
13
9
4
0
2
4
8
8
8
10
7
4
0
4
8

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
1
4
10
18
28
39
51
55
50
50
46
38
30
32
40

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)

8
7
7
7
7
7
8
8
8
9
9
9
9
9
8
7
7
6
5
6
6
5
5
5

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

12
12
10
10
10
11
12
13
14
14
15
21
21
21
22
22
21
19
19
19
18
17
16
12

Dew Point (°C)

4
5
4
3
3
3
2
2
2
2
2
2
1
1
1
1
1
3
4
6
8
10
12
12

Relative Humidity (%)

54
59
57
53
51
43
37
31
29
27
25
24
22
21
22
22
23
30
37
47
57
68
82
84

Pressure (mb)

1019
1019
1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
1019
1019
1019
1019
1019
1020
1020
1021
1021
1021
1021
1021

Ozone (du)

357
358
358
358
358
355
353
351
348
344
341
337
334
330
329
327
326
325
325
324
323
322
320
320

Sunday 2

Waning Gibbous 88%

21:59

09:46

03 OK
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 OK
12 OK
13 OK
14 OK
15 OK
16 OK
17 OK
18 OK
19 OK
20 OK
21 OK
22 OK
23 OK
00 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 - 03:51. Astro Dark: 23:38 - 02:39

Total Clouds (% Sky Obscured)

44
50
54
54
62
70
75
60
48
37
35
35
34
39
43
45
41
40
38
29
19
10

Low Clouds (% Sky Obscured)

0
0
0
1
0
0
0
0
0
0
3
6
10
8
4
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

11
29
50
54
62
61
60
49
37
27
28
24
21
14
10
5
9
14
18
12
6
0

High Clouds (% Sky Obscured)

44
50
49
45
33
21
9
7
5
3
3
2
1
14
26
42
30
18
3
9
15
10

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

Fog (%)

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

Precipitation Probability (%)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

14
13
13
13
14
16
18
21
22
23
25
25
26
26
26
25
25
23
21
19
18
17

Feels Like (°C)

12
12
12
11
11
15
16
17
17
18
19
25
24
24
25
26
27
21
20
20
19
18

Dew Point (°C)

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

Relative Humidity (%)

87
90
86
82
79
62
49
40
34
30
26
24
22
21
24
27
30
36
45
54
60
65

Pressure (mb)

1021
1021
1021
1021
1022
1022
1022
1022
1022
1021
1021
1021
1020
1020
1020
1020
1020
1020
1021
1021
1021
1021

Ozone (du)

320
320
320
320
320
320
320
321
321
321
321
322
322
322
322
322
322
322
322
322
322
322

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

Generated: 27/07/26 03:31:36. Forecast: 27/07/26 to 02/08/26. Timezone: UTC+1.00