Clear Outside v1.0 - International Weather Forecasts For Astronomers

Tuesday 9

Waning Gibbous 77%

21:21

11:45

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
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad

Sun - Rise: 07:53, Set: 15:57, Transit: 11:55. Moon - Rise: 21:21, Set: 11:45. Civil Dark: 16:36 - 07:15. Nautical Dark: 17:18 - 06:32. Astro Dark: 17:58 - 05:52

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
95
100
100
100
100
99
99
96
69
37
69
96
100
96
98

Low Clouds (% Sky Obscured)

95
80
79
64
77
79
83
93
83
79
76
80
88
72
66
76
54
69
37
56
69
45
63
62

Medium Clouds (% Sky Obscured)

85
91
100
100
100
100
100
100
88
95
100
82
75
97
98
65
92
20
10
45
14
87
69
33

High Clouds (% Sky Obscured)

100
100
100
100
100
56
100
96
100
71
100
92
96
100
57
94
66
0
6
5
67
100
55
95

ISS Passover

Visibility (miles)

9
9
9
6
4
4
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
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

35
24
85
95
95
95
95
92
73
37
54
51
42
51
47
27
26
19
7
4
1
3
10
14

Precipitation Amount (mm)

0
0
0.6
0.9
1.6
1.7
0.9
0.7
0.5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

11
12
14
15
17
17
19
19
18
17
17
19
20
22
22
24
24
24
22
17
15
13
12
12

Chance of Frost

Temperature (°C)

13
13
12
12
12
12
11
12
12
12
12
12
12
13
13
13
13
13
12
12
12
12
11
11

Feels Like (°C)

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

Dew Point (°C)

11
11
10
10
10
10
10
10
10
9
10
9
9
11
11
10
11
11
11
10
10
10
10
10

Relative Humidity (%)

90
87
87
89
90
92
90
87
87
86
84
83
80
87
87
84
87
89
90
87
88
90
90
91

Pressure (mb)

1010
1009
1009
1008
1007
1007
1006
1005
1005
1005
1004
1004
1003
1003
1003
1003
1003
1004
1005
1006
1007
1008
1009
1010

Ozone (du)

307
302
297
295
294
292
290
289
288
287
288
288
287
285
285
285
285
285
285
285
286
285
286
285

Wednesday 10

Waning Gibbous 67%

22:40

12:01

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 OK
16 OK
17 Good
18 Good
19 Good
20 Good
21 Good
22 Good
23 Bad

Sun - Rise: 07:54, Set: 15:57, Transit: 11:56. Moon - Rise: 22:40, Set: 12:01. Civil Dark: 16:36 - 07:16. Nautical Dark: 17:18 - 06:33. Astro Dark: 17:58 - 05:53

Total Clouds (% Sky Obscured)

99
100
100
100
100
100
100
56
55
65
73
63
60
47
45
38
26
0
0
0
5
0
0
42

Low Clouds (% Sky Obscured)

69
56
54
54
58
52
60
56
55
65
59
61
60
45
42
38
26
0
0
0
5
0
0
39

Medium Clouds (% Sky Obscured)

46
47
24
14
4
3
8
2
30
30
56
27
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

71
100
100
100
100
100
100
4
23
19
10
20
20
20
20
1
0
0
0
0
0
0
0
4

ISS Passover

Visibility (miles)

9
9
9
9
9
9
8
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 (%)

8
4
7
19
23
22
16
4
5
15
28
15
5
11
4
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)

11
12
12
12
12
12
13
13
13
13
14
15
14
13
11
9
7
6
5
5
5
4
4
5

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

8
9
7
7
7
7
7
6
7
7
8
8
8
8
9
9
10
10
9
8
8
8
8
8

Dew Point (°C)

10
10
10
10
10
9
9
10
10
10
10
10
10
10
10
10
9
9
8
7
7
7
7
7

Relative Humidity (%)

93
95
93
93
93
91
91
93
93
93
90
87
86
84
84
87
93
93
95
93
93
93
93
93

Pressure (mb)

1010
1010
1011
1012
1012
1012
1013
1013
1014
1015
1016
1016
1016
1017
1017
1018
1019
1020
1020
1021
1021
1022
1022
1022

Ozone (du)

284
280
278
277
277
279
283
287
289
293
294
295
296
297
299
303
307
306
307
307
305
305
305
303

Thursday 11

Third Quarter 57%

23:55

12:14

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
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad

Sun - Rise: 07:55, Set: 15:57, Transit: 11:56. Moon - Rise: 23:55, Set: 12:14. Civil Dark: 16:36 - 07:16. Nautical Dark: 17:18 - 06:34. Astro Dark: 17:58 - 05:54

Total Clouds (% Sky Obscured)

56
58
55
59
60
63
53
51
68
88
99
99
100
97
93
67
77
91
94
97
100
100
100
100

Low Clouds (% Sky Obscured)

56
58
55
59
60
63
53
51
68
85
99
99
100
96
86
56
70
77
83
84
85
71
58
46

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
25
49
80
67
77
84
89
93
97
64
24
20

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
5
8
14
15
20
30
30
27
15
15
10
35
60
90
92
99
100

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
6
4
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
1
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
Light Rain
None
None
None
None

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2
4
10
41
70
40
16
15
3

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.4
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

8
8
8
8
8
8
8
8
8
9
10
10
10
10
10
10
9
9
10
10
10
10
10
10

Feels Like (°C)

7
8
8
8
8
6
7
8
8
7
8
7
7
7
7
8
7
6
7
7
7
7
7
7

Dew Point (°C)

7
7
7
7
8
8
8
8
8
8
9
8
8
8
8
9
9
8
9
9
9
10
10
10

Relative Humidity (%)

93
95
95
95
95
96
96
96
96
96
95
88
87
87
88
93
96
95
96
96
96
98
98
96

Pressure (mb)

1022
1022
1022
1021
1021
1020
1020
1020
1020
1020
1020
1019
1018
1017
1017
1016
1016
1015
1015
1015
1014
1014
1014
1013

Ozone (du)

302
303
302
302
303
304
304
304
306
306
307
309
307
306
307
308
309
311
311
308
308
310
309
308

Friday 12

Waning Crescent 46%

No Rise

12:25

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
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad

Sun - Rise: 07:56, Set: 15:57, Transit: 11:57. Moon - Rise: No Rise, Set: 12:25. Civil Dark: 16:36 - 07:17. Nautical Dark: 17:18 - 06:35. Astro Dark: 17:58 - 05:55

Total Clouds (% Sky Obscured)

100
100
100
99
97
97
98
99
100
100
100
99
100
100
100
100
99
99
98
97
96
94
90
89

Low Clouds (% Sky Obscured)

59
73
90
83
66
49
47
43
62
58
46
78
72
63
53
58
43
30
25
25
25
25
26
27

Medium Clouds (% Sky Obscured)

42
62
72
85
78
81
55
56
74
73
81
72
90
87
63
66
85
59
77
82
94
91
85
79

High Clouds (% Sky Obscured)

100
100
100
68
39
9
39
70
100
72
40
10
16
21
27
50
70
91
55
67
65
54
43
33

ISS Passover

Visibility (miles)

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

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
Very Light Rain
Very Light Rain
Very Light Rain
None
None
None
None
None
None
None
None

Precipitation Probability (%)

12
16
7
12
15
10
17
22
11
6
14
13
44
63
66
56
35
16
24
22
27
41
42
49

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0.3
0.3
0.2
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

11
11
11
11
10
10
10
10
12
12
13
13
11
10
8
5
4
4
5
4
4
3
2
2

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

9
9
9
9
9
9
10
10
9
9
9
9
9
8
8
8
7
7
6
6
6
6
6
6

Relative Humidity (%)

95
95
93
91
90
93
95
95
93
90
88
88
84
80
80
84
85
85
84
88
88
91
93
93

Pressure (mb)

1013
1012
1012
1012
1012
1012
1011
1012
1012
1013
1013
1013
1013
1014
1014
1014
1015
1016
1016
1017
1018
1018
1019
1019

Ozone (du)

310
310
310
310
310
310
311
313
314
316
317
317
318
319
318
319
319
321
323
324
326
327
326
326

Saturday 13

Waning Crescent 36%

01:07

12:36

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
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad

Sun - Rise: 07:57, Set: 15:57, Transit: 11:57. Moon - Rise: 01:07, Set: 12:36. Civil Dark: 16:36 - 07:18. Nautical Dark: 17:18 - 06:36. Astro Dark: 17:58 - 05:56

Total Clouds (% Sky Obscured)

77
69
59
56
54
51
54
57
59
59
62
61
56
54
55
62
57
50
50
49
54
67
77
84

Low Clouds (% Sky Obscured)

29
31
37
33
29
24
29
33
38
42
46
49
51
53
54
59
57
50
50
49
54
67
71
75

Medium Clouds (% Sky Obscured)

63
46
40
50
50
45
54
55
55
45
40
29
20
14
25
22
14
4
2
1
0
9
19
28

High Clouds (% Sky Obscured)

26
7
20
20
15
15
15
1
1
0
0
0
0
0
0
0
0
0
6
14
20
25
26
33

ISS Passover

Visibility (miles)

7
6
9
9
9
9
9
9
9
6
7
7
6
7
8
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
Very Light Rain
Very Light Rain
Very Light Rain
Light Rain
Very Light Rain
Very Light Rain
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

53
47
12
6
4
1
5
17
45
48
57
70
58
53
45
37
24
2
1
0
0
0
1
0

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0.2
0.2
0.3
0.4
0.3
0.2
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

2
2
3
3
3
3
4
4
5
5
6
8
10
9
9
9
9
9
8
9
9
9
9
9

Chance of Frost

Temperature (°C)

7
7
7
7
7
7
7
7
7
8
9
9
10
10
9
9
8
8
7
7
7
7
8
8

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

93
93
94
93
93
91
91
91
91
90
88
84
82
84
84
87
88
91
91
91
91
91
90
91

Pressure (mb)

1019
1019
1019
1020
1020
1020
1020
1021
1021
1022
1022
1022
1022
1022
1022
1022
1022
1023
1023
1023
1023
1023
1023
1023

Ozone (du)

326
325
325
325
328
330
336
347
357
368
386
395
393
389
384
379
371
362
354
350
346
343
340
337

Sunday 14

Waning Crescent 27%

02:18

12:48

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
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad

Sun - Rise: 07:58, Set: 15:57, Transit: 11:58. Moon - Rise: 02:18, Set: 12:48. Civil Dark: 16:36 - 07:19. Nautical Dark: 17:19 - 06:37. Astro Dark: 17:59 - 05:56

Total Clouds (% Sky Obscured)

80
79
77
73
70
68
68
68
78
80
78
71
78
89
99
99
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

77
74
74
72
68
64
62
62
64
55
49
41
54
76
97
98
99
100
90
82
74
79
79
75

Medium Clouds (% Sky Obscured)

35
35
43
37
32
38
46
51
55
38
21
4
3
3
1
4
5
9
28
43
43
45
60
73

High Clouds (% Sky Obscured)

29
19
15
10
5
5
0
0
0
0
0
5
4
4
0
33
67
100
100
100
100
99
98
98

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
Light Rain
Light Rain

Precipitation Probability (%)

4
10
11
15
14
8
16
15
16
12
7
9
12
12
12
8
8
10
12
14
15
51
79
95

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
0.5
0.6

Wind Speed/Direction (mph)

9
9
9
10
10
10
11
12
12
13
14
15
15
15
15
14
15
16
17
17
18
19
18
18

Chance of Frost

Temperature (°C)

8
8
9
9
9
9
9
9
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
11

Feels Like (°C)

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

Dew Point (°C)

7
7
8
8
8
8
8
9
9
10
10
9
9
9
9
8
8
8
8
8
8
8
8
9

Relative Humidity (%)

90
91
95
96
96
95
95
95
95
96
95
91
91
91
91
90
88
88
87
85
84
84
85
87

Pressure (mb)

1022
1022
1022
1021
1021
1021
1020
1020
1020
1020
1020
1020
1019
1018
1017
1017
1016
1016
1015
1015
1014
1013
1013
1012

Ozone (du)

334
330
327
324
321
318
316
315
315
314
313
311
310
308
307
305
304
303
302
300
299
298
298
298

Monday 15

Waning Crescent 19%

03:29

13:01

Sun - Rise: 07:59, Set: 15:57, Transit: 11:58. Moon - Rise: 03:29, Set: 13:01. Civil Dark: 16:36 - 07:20. Nautical Dark: 17:19 - 06:37. Astro Dark: 17:59 - 05:57

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 Chichester, West Sussex, United Kingdom (50.84,-0.77)

Generated: 08/12/25 23:12:30. Forecast: 09/12/25 to 15/12/25. Timezone: UTC+0.00