Clear Outside v1.0 - International Weather Forecasts For Astronomers

Sunday 14

Waning Crescent 26%

03:29

12:48

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
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad

Sun - Rise: 07:59, Set: 15:57, Transit: 11:58. Moon - Rise: 03:29, Set: 12:48. Civil Dark: 16:36 - 07:20. Nautical Dark: 17:19 - 06:37. Astro Dark: 17:59 - 05:57

Total Clouds (% Sky Obscured)

45
54
66
100
100
92
85
87
85
85
75
76
71
80
89
82
95
100
96
97
88
94
92
100

Low Clouds (% Sky Obscured)

45
54
66
61
82
67
82
87
85
82
73
74
71
79
76
76
89
100
96
97
87
93
92
100

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
1
0
0
0
0
0
2
2
2
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

45
53
52
57
57
50
71
34
14
33
27
24
22
43
74
63
66
51
21
17
5
5
3
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
1
13
16
6
0
0
0
0
3
1
18
25
22
26

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

4
5
6
6
6
6
6
5
5
5
5
5
5
5
5
5
5
5
4
3
3
3
4
4

Dew Point (°C)

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

Relative Humidity (%)

90
90
84
82
85
85
87
90
90
90
93
88
88
90
88
82
91
95
91
90
87
85
91
91

Pressure (mb)

1022
1022
1021
1021
1020
1019
1018
1018
1017
1016
1016
1015
1015
1014
1014
1013
1012
1011
1011
1010
1009
1009
1008
1008

Ozone (du)

298
297
296
294
294
294
295
295
296
298
298
298
298
298
299
302
303
305
307
308
310
312
313
314

Monday 15

Waning Crescent 19%

04:40

13:01

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
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad

Sun - Rise: N/A, Set: 15:57, Transit: 11:58. Moon - Rise: 04:40, Set: 13:01. Civil Dark: 16:36 - 07:20. Nautical Dark: 17:19 - 06:38. Astro Dark: 17:59 - 05:58

Total Clouds (% Sky Obscured)

100
100
95
98
90
69
71
81
62
62
40
47
45
37
57
91
63
100
100
100
100
100
100
97

Low Clouds (% Sky Obscured)

100
100
95
98
90
69
71
81
62
62
40
39
35
37
44
50
40
41
48
50
53
52
61
58

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
16
13
2
12
72
62
100
100
85
100
100
100
97

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
1
2
1
3
8
15
19
25
27
39
100
100
100
100
56

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 (%)

24
20
18
18
12
6
5
2
3
1
2
0
0
0
0
1
2
16
0
3
2
4
5
7

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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

90
91
91
90
87
84
84
88
90
90
90
90
88
91
91
93
93
93
93
91
93
95
95
95

Pressure (mb)

1008
1008
1007
1007
1006
1006
1005
1005
1005
1005
1005
1005
1005
1005
1005
1005
1005
1005
1005
1005
1005
1006
1006
1007

Ozone (du)

317
320
324
329
336
342
344
342
339
337
337
337
335
330
323
318
312
308
306
305
302
301
298
298

Tuesday 16

Waning Crescent 12%

05:53

13:18

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

Sun - Rise: 08:00, Set: 15:57, Transit: 11:59. Moon - Rise: 05:53, Set: 13:18. Civil Dark: 16:37 - 07:21. Nautical Dark: 17:19 - 06:39. Astro Dark: 17:59 - 05:59

Total Clouds (% Sky Obscured)

97
99
100
100
100
100
100
98
95
81
53
57
52
11
2
2
5
8
12
41
69
100
100
100

Low Clouds (% Sky Obscured)

43
53
70
76
86
100
100
98
89
37
29
15
13
2
0
0
0
0
0
14
29
43
44
46

Medium Clouds (% Sky Obscured)

96
99
100
100
100
93
97
44
25
21
11
14
15
8
2
2
4
0
0
0
0
0
15
33

High Clouds (% Sky Obscured)

59
83
100
100
100
98
55
2
0
0
1
1
1
0
0
0
4
8
12
39
66
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
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
1
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 (%)

10
32
18
21
20
10
2
4
3
2
1
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)

10
9
9
9
10
10
9
7
7
10
11
10
9
8
6
6
5
5
5
4
4
3
2
3

Chance of Frost

Temperature (°C)

11
11
11
10
9
9
9
8
8
8
7
7
6
6
5
4
3
2
2
1
2
2
2
3

Feels Like (°C)

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

Dew Point (°C)

10
9
9
8
7
7
7
7
6
6
5
5
4
4
4
3
2
1
1
0
0
0
0
1

Relative Humidity (%)

95
91
91
88
85
87
88
88
87
88
88
88
85
88
91
91
93
93
91
91
89
89
88
85

Pressure (mb)

1008
1009
1010
1010
1010
1010
1011
1012
1012
1013
1014
1015
1016
1016
1017
1017
1018
1018
1018
1019
1019
1019
1019
1020

Ozone (du)

296
294
295
302
305
310
314
322
330
333
333
341
353
356
361
357
349
338
334
331
326
327
327
326

Wednesday 17

Waning Crescent 7%

07:03

13:40

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
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad

Sun - Rise: 08:00, Set: 15:58, Transit: 11:59. Moon - Rise: 07:03, Set: 13:40. Civil Dark: 16:37 - 07:22. Nautical Dark: 17:19 - 06:39. Astro Dark: 18:00 - 05:59

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
97
100
99
95

Low Clouds (% Sky Obscured)

42
37
27
16
29
41
50
54
89
87
92
96
96
81
96
88
76
94
87
91
81
78
79
80

Medium Clouds (% Sky Obscured)

57
63
69
90
95
92
92
42
42
52
62
67
62
67
74
72
67
98
91
93
81
71
71
71

High Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
90
90
100
99
100
100
100
100
92
100
100
89
100
99
95

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
Very Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Moderate Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain

Precipitation Probability (%)

0
14
22
29
31
35
41
45
55
69
66
68
79
95
95
95
95
95
95
95
95
95
95
95

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0.3
0.4
0.4
0.4
0.5
0.9
1.4
1.8
2
2.3
2.5
2.2
1.9
1.5
1.3
1.2

Wind Speed/Direction (mph)

4
5
6
8
10
11
12
13
12
14
15
15
16
15
16
17
16
15
16
16
16
16
15
14

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

2
4
5
5
5
5
5
5
6
6
5
5
4
5
5
5
6
6
6
6
6
6
6
7

Dew Point (°C)

2
4
4
4
5
5
5
6
6
6
6
5
6
6
6
6
6
7
7
7
7
7
7
7

Relative Humidity (%)

83
82
79
78
78
80
80
81
87
82
80
78
78
81
78
78
81
82
81
84
84
80
83
84

Pressure (mb)

1020
1020
1020
1020
1020
1019
1019
1018
1018
1018
1017
1017
1017
1016
1016
1015
1015
1014
1014
1013
1013
1012
1012
1011

Ozone (du)

324
320
317
315
314
312
310
308
305
305
301
301
299
299
295
298
299
295
294
294
292
291
285
282

Thursday 18

Waning Crescent 3%

08:07

14:10

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
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad

Sun - Rise: 08:01, Set: 15:58, Transit: 12:00. Moon - Rise: 08:07, Set: 14:10. Civil Dark: 16:37 - 07:22. Nautical Dark: 17:20 - 06:40. Astro Dark: 18:00 - 06:00

Total Clouds (% Sky Obscured)

90
100
100
100
100
100
98
97
90
100
100
100
100
100
100
100
100
100
100
100
100
100
87
73

Low Clouds (% Sky Obscured)

77
72
66
61
58
54
50
49
48
47
85
73
61
51
41
33
38
43
42
35
28
21
28
36

Medium Clouds (% Sky Obscured)

60
50
50
55
45
45
45
55
60
70
64
53
57
61
72
83
73
66
62
68
69
71
68
73

High Clouds (% Sky Obscured)

90
100
100
96
100
100
98
97
90
100
100
100
100
99
97
96
96
98
100
100
100
100
77
50

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

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

Precipitation Probability (%)

95
95
95
78
73
67
60
47
35
22
36
33
36
45
50
51
42
29
2
3
3
4
10
13

Precipitation Amount (mm)

1
0.9
0.8
0.5
0.4
0.4
0.2
0
0
0
0
0
0
0
0.2
0.2
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

7
6
6
5
5
5
5
5
4
5
4
5
5
4
4
4
4
3
4
4
3
4
3
3

Dew Point (°C)

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

Relative Humidity (%)

87
88
90
87
81
85
90
88
85
83
83
84
86
84
83
80
77
77
78
80
81
84
85
87

Pressure (mb)

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

Ozone (du)

280
280
281
282
278
275
272
271
270
272
272
270
267
265
269
274
278
282
286
289
292
294
296
299

Friday 19

Waning Crescent 1%

08:07

14:52

08 Bad
09 Bad
10 Bad
11 OK
12 Bad
13 OK
14 OK
15 OK
16 OK
17 Bad
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

Sun - Rise: 08:02, Set: 15:58, Transit: 12:00. Moon - Rise: 08:07, Set: 14:52. Civil Dark: 16:38 - 07:23. Nautical Dark: 17:20 - 06:40. Astro Dark: 18:00 - 06:00

Total Clouds (% Sky Obscured)

60
54
46
37
37
34
34
31
32
40
55
66
77
82
88
90
92
94
97
98
99
100
100
100

Low Clouds (% Sky Obscured)

44
40
35
29
33
34
34
31
28
20
18
16
15
23
28
34
32
32
27
31
36
37
40
40

Medium Clouds (% Sky Obscured)

60
54
46
37
37
34
34
31
32
40
46
42
51
54
54
52
45
37
30
25
23
20
20
20

High Clouds (% Sky Obscured)

10
9
4
3
0
0
0
0
0
0
5
10
25
50
50
45
50
73
91
93
97
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
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 (%)

12
12
14
13
17
17
17
17
15
10
9
8
5
15
18
14
20
21
15
16
11
1
1
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

3
4
4
4
4
7
7
6
7
7
6
4
5
5
5
5
5
4
4
5
5
5
5
3

Dew Point (°C)

6
6
6
6
6
6
7
7
6
6
6
5
5
5
4
4
4
4
5
5
5
5
4
4

Relative Humidity (%)

88
90
85
80
77
80
82
85
87
88
90
90
90
90
88
88
90
90
90
90
90
90
90
88

Pressure (mb)

1015
1016
1017
1017
1018
1018
1019
1019
1019
1020
1020
1020
1021
1021
1021
1021
1021
1021
1021
1021
1021
1020
1020
1020

Ozone (du)

303
306
310
313
317
325
332
340
345
351
356
346
336
326
323
320
316
309
301
294
289
284
279
279

Saturday 20

New Moon 0%

09:00

15:46

Sun - Rise: 08:02, Set: 15:59, Transit: 12:01. Moon - Rise: 09:00, Set: 15:46. Civil Dark: 16:38 - 07:23. Nautical Dark: 17:21 - 06:41. Astro Dark: 18:01 - 06:01

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: 14/12/25 08:05:50. Forecast: 14/12/25 to 20/12/25. Timezone: UTC+0.00