Clear Outside v1.0 - International Weather Forecasts For Astronomers

Saturday 13

Waning Gibbous 64%

21:34

14:35

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

Sun - Rise: 06:35, Set: 19:20, Transit: 12:57. Moon - Rise: 21:34, Set: 14:35. Civil Dark: 19:53 - 06:02. Nautical Dark: 20:33 - 05:21. Astro Dark: 21:16 - 04:39

Total Clouds (% Sky Obscured)

67
74
77
100
100
100
77
50
54
73
76
57
41
49
29
15
26
100
100
100
67
0
0
0

Low Clouds (% Sky Obscured)

54
61
47
50
48
49
57
50
54
46
37
26
41
36
29
15
26
22
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

67
41
50
53
82
26
53
0
0
19
21
18
0
8
4
4
12
39
81
98
49
0
0
0

High Clouds (% Sky Obscured)

50
0
43
45
55
57
25
2
0
5
8
22
2
0
0
0
2
62
66
100
2
0
0
0

ISS Passover

Visibility (miles)

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

Very 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 (%)

59
37
42
44
48
37
31
37
42
53
50
43
37
18
19
27
9
25
5
4
2
1
1
0

Precipitation Amount (mm)

0.2
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
9
8
11
9
9
9
12
13
14
15
15
16
14
13
12
11
7
6
5
5
5
5
5

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

9
9
8
9
10
9
11
11
12
13
14
14
13
14
15
13
14
15
14
12
10
11
10
10

Dew Point (°C)

10
10
10
10
10
10
11
10
10
9
10
10
9
7
5
7
10
11
11
11
10
10
9
9

Relative Humidity (%)

84
89
89
90
87
89
87
80
71
63
65
60
56
51
44
53
64
73
83
86
86
88
91
93

Pressure (mb)

1010
1010
1009
1009
1009
1009
1009
1009
1009
1009
1009
1009
1009
1009
1009
1009
1009
1009
1010
1011
1011
1012
1012
1012

Ozone (du)

308
308
308
308
309
310
311
312
314
313
314
315
316
318
316
314
314
314
317
315
315
315
312
304

Sunday 14

Third Quarter 52%

22:27

15:50

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

Sun - Rise: 06:37, Set: 19:18, Transit: 12:57. Moon - Rise: 22:27, Set: 15:50. Civil Dark: 19:51 - 06:03. Nautical Dark: 20:31 - 05:23. Astro Dark: 21:13 - 04:41

Total Clouds (% Sky Obscured)

9
97
20
49
59
90
82
100
100
100
100
100
99
100
100
100
99
99
72
37
53
43
53
42

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
59
57
55
55
70
49
81
94
89
88
99
64
34
51
43
53
42

Medium Clouds (% Sky Obscured)

0
0
0
0
0
23
33
79
95
100
95
100
98
89
58
100
89
77
20
0
2
0
0
0

High Clouds (% Sky Obscured)

7
56
14
49
38
89
82
100
100
100
100
100
80
90
90
76
19
4
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
3
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
Very Light Rain
Light Rain
Very Light Rain
Light Rain
Light Rain
None
Very Light Rain
Light Rain
Very Light Rain
None
None
None

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
1
2
29
57
95
82
90
95
38
83
95
67
4
6
4

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0.2
1.1
0.3
0.4
0.7
0
0.3
0.9
0.2
0
0
0

Wind Speed/Direction (mph)

5
5
5
4
4
4
3
4
7
10
12
12
14
14
15
18
18
18
19
20
21
20
19
19

Chance of Frost

Temperature (°C)

10
9
9
8
8
8
9
12
14
15
15
16
17
17
16
16
17
18
18
18
17
16
16
15

Feels Like (°C)

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

Dew Point (°C)

9
8
8
7
7
6
6
7
8
8
7
9
12
14
14
14
17
17
17
17
16
13
14
13

Relative Humidity (%)

93
93
91
91
91
91
82
72
68
61
55
63
73
85
85
86
95
95
95
90
92
82
86
86

Pressure (mb)

1012
1013
1013
1013
1013
1013
1013
1013
1013
1012
1012
1011
1010
1009
1007
1006
1004
1004
1003
1003
1002
1003
1003
1004

Ozone (du)

297
290
287
284
279
275
272
269
267
263
261
260
261
261
261
261
260
260
259
263
263
269
270
272

Monday 15

Waning Crescent 41%

23:37

16:47

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: 06:38, Set: 19:15, Transit: 12:57. Moon - Rise: 23:37, Set: 16:47. Civil Dark: 19:49 - 06:05. Nautical Dark: 20:29 - 05:25. Astro Dark: 21:11 - 04:43

Total Clouds (% Sky Obscured)

54
55
58
46
56
52
44
53
56
36
78
82
73
68
50
41
47
49
52
52
57
68
76
76

Low Clouds (% Sky Obscured)

53
52
58
45
51
47
44
53
54
28
61
75
58
52
50
41
47
48
49
51
50
53
55
54

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
1
5
12
3
9
11
0
0
0
0
0
0
1
3
6
5

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
14
28
43
45

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 (%)

6
8
16
5
4
2
2
3
3
4
9
9
33
30
18
6
3
3
3
2
3
2
0
1

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)

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

Chance of Frost

Temperature (°C)

15
15
15
15
14
14
15
15
16
17
18
19
18
18
17
17
16
16
15
14
14
14
13
13

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

86
84
79
80
80
74
67
68
65
59
53
50
49
51
52
56
61
64
70
75
80
83
86
87

Pressure (mb)

1004
1004
1004
1004
1004
1005
1006
1007
1007
1008
1008
1008
1008
1009
1009
1009
1010
1010
1011
1012
1012
1013
1013
1013

Ozone (du)

275
277
280
280
283
284
285
285
284
287
291
296
302
303
302
301
301
301
300
301
302
302
302
303

Tuesday 16

Waning Crescent 30%

00:57

17:27

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

Sun - Rise: 06:40, Set: 19:13, Transit: 12:56. Moon - Rise: 00:57, Set: 17:27. Civil Dark: 19:46 - 06:06. Nautical Dark: 20:26 - 05:27. Astro Dark: 21:08 - 04:45

Total Clouds (% Sky Obscured)

80
79
68
60
56
50
47
40
44
44
44
56
73
91
93
95
98
98
99
100
100
100
100
100

Low Clouds (% Sky Obscured)

53
51
49
47
45
38
34
30
28
33
29
34
36
32
32
26
30
35
35
40
42
53
56
63

Medium Clouds (% Sky Obscured)

3
1
1
2
19
35
6
25
7
4
7
33
73
89
70
77
78
73
63
74
81
92
100
99

High Clouds (% Sky Obscured)

58
60
45
30
20
20
15
20
22
19
26
35
49
67
75
83
93
95
98
100
100
100
100
78

ISS Passover

Visibility (miles)

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

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
Very Light Rain
Light Rain

Precipitation Probability (%)

2
1
1
1
2
2
1
1
12
14
12
15
17
17
17
24
24
18
5
6
35
57
71
94

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
0.3
0.6

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

13
13
13
13
12
12
13
14
15
16
17
18
18
18
18
17
16
15
14
14
13
13
13
13

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

86
89
87
84
87
89
84
75
67
63
58
55
56
59
66
69
77
86
86
84
86
87
93
90

Pressure (mb)

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

Ozone (du)

303
303
301
299
301
299
296
293
287
282
280
276
274
271
270
270
268
267
267
267
266
264
265
263

Wednesday 17

Waning Crescent 20%

No Rise

17:54

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: 06:41, Set: 19:11, Transit: 12:56. Moon - Rise: No Rise, Set: 17:54. Civil Dark: 19:44 - 06:08. Nautical Dark: 20:24 - 05:28. Astro Dark: 21:05 - 04:47

Total Clouds (% Sky Obscured)

100
99
99
99
99
99
100
100
97
94
90
89
87
85
83
87
88
91
95
98
95
95
92
94

Low Clouds (% Sky Obscured)

75
88
87
87
87
91
96
100
92
85
77
76
74
73
69
66
62
61
59
57
62
66
67
58

Medium Clouds (% Sky Obscured)

99
98
98
98
67
61
60
57
53
51
50
46
42
41
58
61
68
56
45
28
19
9
0
0

High Clouds (% Sky Obscured)

52
29
26
23
20
20
20
25
30
30
25
25
40
50
51
57
70
88
94
98
82
69
62
79

ISS Passover

Visibility (miles)

6
2
4
2
6
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
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Very Light Rain
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

95
95
95
95
95
95
95
78
65
47
9
14
11
4
4
3
0
0
0
0
0
0
0
0

Precipitation Amount (mm)

0.8
0.9
1.3
1.5
1.6
1.3
0.7
0.4
0.3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

8
10
12
14
16
18
18
19
21
22
21
20
19
19
19
17
16
15
15
14
14
13
12
11

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

95
96
92
93
92
93
93
95
90
81
72
63
62
61
61
62
64
65
68
73
76
80
83
86

Pressure (mb)

1015
1014
1013
1011
1010
1009
1008
1008
1008
1007
1007
1007
1007
1007
1007
1008
1009
1009
1010
1011
1011
1012
1012
1013

Ozone (du)

262
261
261
261
263
263
263
263
263
262
261
261
263
264
265
266
267
269
269
270
271
272
273
274

Thursday 18

Waning Crescent 12%

02:20

18:13

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: 06:43, Set: 19:08, Transit: 12:56. Moon - Rise: 02:20, Set: 18:13. Civil Dark: 19:42 - 06:10. Nautical Dark: 20:21 - 05:30. Astro Dark: 21:03 - 04:49

Total Clouds (% Sky Obscured)

96
98
94
89
87
84
78
78
83
89
95
97
98
100
100
100
100
94
84
75
82
88
95
97

Low Clouds (% Sky Obscured)

47
38
28
15
6
10
15
19
25
29
37
43
47
48
42
36
29
41
52
64
73
81
90
93

Medium Clouds (% Sky Obscured)

0
0
1
2
3
7
5
8
7
7
22
52
67
74
68
58
47
46
51
63
74
85
95
86

High Clouds (% Sky Obscured)

89
95
87
78
69
71
73
76
76
77
78
86
93
100
100
100
100
74
52
40
53
58
58
72

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
13
19
22
42

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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

10
10
10
9
10
9
8
9
10
10
11
12
14
14
13
14
14
15
11
12
12
13
13
14

Dew Point (°C)

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

Relative Humidity (%)

83
82
79
80
83
84
76
69
62
58
54
50
50
49
49
56
61
68
69
73
75
78
82
84

Pressure (mb)

1013
1014
1014
1015
1016
1016
1017
1017
1018
1018
1018
1019
1019
1019
1019
1019
1019
1019
1019
1019
1020
1019
1019
1019

Ozone (du)

275
275
276
277
277
278
277
277
276
275
274
273
272
271
270
269
269
268
268
268
267
267
268
268

Friday 19

Waning Crescent 6%

03:41

18:27

Sun - Rise: 06:44, Set: 19:06, Transit: 12:55. Moon - Rise: 03:41, Set: 18:27. Civil Dark: 19:39 - 06:11. Nautical Dark: 20:19 - 05:32. Astro Dark: 21:00 - 04:51

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 Guildford, Surrey, United Kingdom (51.24,-0.57)

Generated: 13/09/25 02:08:59. Forecast: 13/09/25 to 19/09/25. Timezone: UTC+1.00