Clear Outside v1.0 - International Weather Forecasts For Astronomers

Friday 31

Waning Gibbous 94%

21:39

08:33

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

Sun - Rise: 05:28, Set: 20:53, Transit: 13:10. Moon - Rise: 21:39, Set: 08:33. Civil Dark: 21:33 - 04:48. Nautical Dark: 22:28 - 03:54. Astro Dark: 23:44 - 02:40

Total Clouds (% Sky Obscured)

11
11
41
56
100
100
93
74
34
14
0
0
0
0
0
0
0
30
40
47
62
80
67
74

Low Clouds (% Sky Obscured)

7
11
14
3
1
1
0
0
0
13
0
0
0
0
0
0
0
2
4
0
0
0
1
1

Medium Clouds (% Sky Obscured)

11
11
22
17
40
96
93
63
29
0
0
0
0
0
0
0
0
0
33
47
27
35
22
22

High Clouds (% Sky Obscured)

0
0
26
43
100
100
58
50
0
0
0
0
0
0
0
0
0
29
0
2
27
30
27
30

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)

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

Chance of Frost

Temperature (°C)

23
23
22
20
19
17
16
16
15
14
13
12
11
12
16
18
20
22
23
24
24
25
25
25

Feels Like (°C)

22
20
17
16
16
13
12
13
11
13
12
11
11
12
15
17
19
20
20
22
23
22
22
21

Dew Point (°C)

-1
0
5
5
4
4
5
6
7
7
7
7
6
6
7
7
6
5
4
3
3
3
2
2

Relative Humidity (%)

20
22
34
37
37
41
45
51
57
64
69
71
73
65
54
46
39
33
29
26
24
23
22
21

Pressure (mb)

1017
1017
1018
1018
1019
1019
1020
1020
1020
1020
1020
1020
1020
1020
1021
1021
1021
1020
1020
1020
1019
1019
1018
1018

Ozone (du)

356
355
353
353
352
354
355
357
365
369
373
374
370
368
361
355
352
348
346
343
339
337
334
332

Saturday 1

Waning Gibbous 88%

21:51

09:49

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

Sun - Rise: 05:30, Set: 20:51, Transit: 13:10. Moon - Rise: 21:51, Set: 09:49. Civil Dark: 21:31 - 04:50. Nautical Dark: 22:25 - 03:56. Astro Dark: 23:40 - 02:44

Total Clouds (% Sky Obscured)

99
99
99
94
92
50
53
45
52
46
28
49
84
100
98
90
98
89
68
60
58
69
100
100

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
12
0
10
0

Medium Clouds (% Sky Obscured)

12
9
8
0
0
7
11
3
0
12
4
11
19
25
59
46
56
23
19
11
13
28
35
30

High Clouds (% Sky Obscured)

97
98
98
94
92
37
40
45
52
36
28
47
74
100
95
85
93
81
56
47
35
36
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)

8
8
8
8
7
6
7
6
6
5
4
5
5
5
6
7
7
6
6
7
7
7
8
11

Chance of Frost

Temperature (°C)

25
24
22
20
18
16
15
14
14
13
13
12
12
13
16
19
21
23
25
26
27
28
28
28

Feels Like (°C)

20
20
19
16
15
13
11
11
10
10
10
9
9
10
13
17
20
21
22
24
23
24
24
23

Dew Point (°C)

1
2
3
5
6
5
5
6
5
5
4
4
4
5
8
9
8
6
4
3
2
1
1
2

Relative Humidity (%)

21
23
28
37
44
48
52
58
56
57
57
58
59
55
59
53
42
33
26
21
19
17
17
19

Pressure (mb)

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

Ozone (du)

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

Sunday 2

Waning Gibbous 80%

22:02

11:06

18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad
01 Bad
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

Sun - Rise: 05:31, Set: 20:50, Transit: 13:10. Moon - Rise: 22:02, Set: 11:06. Civil Dark: 21:30 - 04:52. Nautical Dark: 22:23 - 03:59. Astro Dark: 23:36 - 02:48

Total Clouds (% Sky Obscured)

100
96
99
100
100
97
100
59
70
59
54
91
99
99
90
84
100
97
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
27
12
1
0
0
0
0
4
2
0
0
0
0

Medium Clouds (% Sky Obscured)

39
22
22
19
16
26
39
19
23
21
25
73
84
68
85
84
77
50
71
48
31
11
20
27

High Clouds (% Sky Obscured)

100
84
96
100
100
88
100
39
36
39
20
52
67
84
59
44
100
90
100
100
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
8
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
6
20
25
24
5
3
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)

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

Chance of Frost

Temperature (°C)

27
26
25
22
20
20
19
18
17
16
16
15
16
17
19
21
23
25
28
29
29
30
31
30

Feels Like (°C)

21
21
21
18
17
16
15
15
15
14
13
15
13
15
17
19
21
23
26
26
27
28
29
29

Dew Point (°C)

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

Relative Humidity (%)

22
25
28
33
38
41
43
46
56
62
68
73
67
64
58
51
45
42
36
35
35
34
31
30

Pressure (mb)

1013
1013
1014
1014
1014
1014
1014
1013
1013
1012
1012
1012
1012
1012
1012
1012
1011
1011
1011
1010
1009
1009
1008
1008

Ozone (du)

328
328
328
327
327
328
328
329
331
333
332
329
327
325
325
324
324
323
324
323
324
324
325
326

Monday 3

Waning Gibbous 71%

22:14

12:26

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

Sun - Rise: 05:33, Set: 20:48, Transit: 13:10. Moon - Rise: 22:14, Set: 12:26. Civil Dark: 21:28 - 04:53. Nautical Dark: 22:21 - 04:01. Astro Dark: 23:32 - 02:51

Total Clouds (% Sky Obscured)

100
93
82
72
94
91
86
79
63
43
63
58
64
59
54
41
51
92
97
90
81
75
61
47

Low Clouds (% Sky Obscured)

0
0
0
0
5
9
13
14
15
15
18
23
25
28
27
26
27
67
73
45
47
73
61
47

Medium Clouds (% Sky Obscured)

32
55
18
15
12
17
81
79
58
19
19
18
17
14
9
6
15
22
90
88
77
11
36
5

High Clouds (% Sky Obscured)

99
84
72
53
76
56
18
10
4
5
39
50
64
49
26
2
20
55
83
70
45
32
18
1

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
6
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
Very Light Rain
None
None
None
None
None

Precipitation Probability (%)

1
2
2
1
3
3
1
3
2
0
0
0
0
0
0
0
9
27
45
32
18
6
6
2

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.2
0
0
0
0
0

Wind Speed/Direction (mph)

8
9
8
5
5
4
5
4
4
4
5
6
4
5
6
7
9
10
13
14
14
16
16
15

Chance of Frost

Temperature (°C)

30
29
27
24
22
21
20
19
19
18
18
18
18
18
20
23
25
26
26
25
26
27
26
26

Feels Like (°C)

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

Dew Point (°C)

10
10
11
13
13
13
13
13
12
10
10
13
15
14
12
6
8
12
15
16
16
14
15
14

Relative Humidity (%)

28
30
37
47
55
60
65
67
63
56
58
74
85
77
60
34
33
43
50
57
56
44
49
46

Pressure (mb)

1008
1008
1008
1008
1009
1009
1009
1009
1009
1009
1009
1009
1010
1010
1010
1011
1011
1011
1011
1011
1011
1011
1011
1011

Ozone (du)

327
326
328
328
328
326
325
324
324
322
319
316
315
314
314
315
314
313
313
312
313
311
310
311

Tuesday 4

Waning Gibbous 60%

22:28

13:50

18 OK
19 Good
20 Good
21 OK
22 OK
23 OK
00 Bad
01 Bad
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

Sun - Rise: 05:34, Set: 20:46, Transit: 13:09. Moon - Rise: 22:28, Set: 13:50. Civil Dark: 21:26 - 04:55. Nautical Dark: 22:18 - 04:03. Astro Dark: 23:28 - 02:55

Total Clouds (% Sky Obscured)

26
10
11
17
30
41
53
51
53
54
49
50
53
87
76
69
67
63
59
69
79
89
68
48

Low Clouds (% Sky Obscured)

26
9
9
11
18
23
29
30
32
32
32
39
53
58
50
43
49
55
59
68
77
89
68
48

Medium Clouds (% Sky Obscured)

4
4
2
2
4
4
4
4
4
0
0
0
0
19
23
25
17
8
0
4
5
7
3
1

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
8
14
15
7
3
0
2
3
4
1
0

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
7
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
1
0
0
0
0
0
0
0
1
1
0
5
6
3
3
2
0
2
1
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

23
23
22
22
20
19
19
19
19
19
18
18
17
17
17
18
19
20
21
22
22
22
22
21

Dew Point (°C)

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

Relative Humidity (%)

43
41
46
58
67
76
88
92
95
96
96
98
98
92
72
58
45
46
45
45
47
48
51
46

Pressure (mb)

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

Ozone (du)

312
313
313
312
312
312
312
311
313
313
316
317
320
322
323
324
325
323
321
319
319
320
320
321

Wednesday 5

Waning Gibbous 49%

22:47

15:17

18 OK
19 OK
20 OK
21 OK
22 OK
23 Bad
00 Bad
01 Bad
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

Sun - Rise: 05:36, Set: 20:44, Transit: 13:09. Moon - Rise: 22:47, Set: 15:17. Civil Dark: 21:24 - 04:57. Nautical Dark: 22:16 - 04:05. Astro Dark: 23:24 - 02:59

Total Clouds (% Sky Obscured)

29
26
23
20
34
50
76
77
74
70
74
77
81
83
87
89
91
95
100
98
95
93
95
97

Low Clouds (% Sky Obscured)

29
26
23
20
31
18
5
12
13
19
28
38
45
51
55
57
61
65
71
71
68
63
70
78

Medium Clouds (% Sky Obscured)

0
0
0
0
5
10
15
16
12
8
10
12
15
15
16
13
13
14
14
14
20
20
19
17

High Clouds (% Sky Obscured)

0
0
0
0
30
50
76
51
24
3
4
5
5
6
7
8
24
41
53
49
45
45
50
70

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
Very Light Rain
Light Rain
Light Rain
Very Light Rain
None

Precipitation Probability (%)

0
0
0
0
1
2
0
0
0
0
0
0
0
1
3
4
26
46
45
59
73
78
62
51

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.2
0.5
0.7
0.3
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

25
25
23
21
19
18
17
17
16
16
15
16
16
16
18
19
21
21
21
21
21
21
21
21

Feels Like (°C)

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

Dew Point (°C)

11
10
11
12
13
14
14
15
15
15
15
14
14
14
14
14
13
13
13
13
12
10
9
9

Relative Humidity (%)

42
38
45
55
68
75
82
90
90
93
95
92
89
86
77
69
62
61
61
61
54
49
44
46

Pressure (mb)

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

Ozone (du)

322
323
324
324
324
324
325
325
324
324
324
323
323
323
323
323
323
325
326
327
333
338
344
342

Thursday 6

Third Quarter 37%

23:12

16:43

18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad

Sun - Rise: 05:38, Set: 20:43, Transit: 13:09. Moon - Rise: 23:12, Set: 16:43. Civil Dark: 21:22 - 04:59. Nautical Dark: 22:13 - 04:08. Astro Dark: 23:20 - 03:02

Total Clouds (% Sky Obscured)

99
99
97
92
80
67
56
61
69
77
77
74
71
71
71
71
71
76
77

Low Clouds (% Sky Obscured)

87
80
73
67
56
43
32
44
58
65
64
60
60
60
52
47
50
52
45

Medium Clouds (% Sky Obscured)

16
15
13
7
8
10
13
14
13
14
20
22
22
22
23
23
21
19
21

High Clouds (% Sky Obscured)

75
80
80
75
69
64
56
58
64
76
69
73
70
70
70
57
53
54
46

ISS Passover

Visibility (miles)

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

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

32
29
23
4
8
11
3
15
19
6
9
12
7
14
16
19
24
17
7

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)

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

Chance of Frost

Temperature (°C)

21
21
20
19
18
18
17
17
17
17
17
16
16
16
17
18
20
20
21

Feels Like (°C)

20
20
18
19
19
19
19
19
16
17
18
17
16
15
17
16
16
16
16

Dew Point (°C)

10
10
10
11
12
12
13
13
13
13
14
13
12
12
10
8
7
5
3

Relative Humidity (%)

47
48
53
59
65
70
73
77
79
81
82
79
77
74
62
51
42
36
30

Pressure (mb)

1017
1017
1017
1018
1018
1018
1018
1018
1018
1018
1018
1019
1019
1019
1019
1019
1019
1019
1019

Ozone (du)

339
337
335
333
331
329
327
325
323
322
320
318
316
314
313
312
311
310
309

Forecast for Reading, Reading, United Kingdom (51.45,-0.98)

Generated: 31/07/26 18:30:07. Forecast: 31/07/26 to 06/08/26. Timezone: UTC+1.00