Clear Outside v1.0 - International Weather Forecasts For Astronomers

Monday 8

Waning Gibbous 77%

20:17

12:01

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
18 Bad

Sun - Rise: 08:09, Set: 16:16, Transit: 12:12. Moon - Rise: 20:17, Set: 12:01. Civil Dark: 16:54 - 07:30. Nautical Dark: 17:36 - 06:49. Astro Dark: 18:16 - 06:09

Total Clouds (% Sky Obscured)

84
87
90
92
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
55
54
52
53
52

Low Clouds (% Sky Obscured)

84
87
90
89
84
87
87
88
99
95
90
77
84
86
97
67
67
60
63
48
44
44
45
46

Medium Clouds (% Sky Obscured)

82
77
90
92
100
100
100
100
100
93
76
100
72
100
67
71
100
100
74
50
46
50
50
19

High Clouds (% Sky Obscured)

84
87
90
92
100
100
100
100
100
100
100
100
100
100
36
39
64
100
100
55
54
52
53
52

ISS Passover

Visibility (miles)

4
4
3
3
5
4
3
3
9
9
9
9
9
7
9
9
9
8
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
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
None
None
Very Light Rain
Light Rain
Light Rain
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

21
76
95
95
95
95
95
95
95
47
55
68
95
92
13
45
47
34
16
15
0
6
0
0

Precipitation Amount (mm)

0
0.6
1.2
1.4
1.9
2.2
2.3
1.8
0.4
0
0
0.3
1
0.7
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

9
8
15
18
25
26
29
30
30
29
29
30
31
31
31
31
31
28
23
22
18
15
14
13

Chance of Frost

Temperature (°C)

13
13
13
13
13
13
13
13
13
13
14
14
14
14
14
14
14
14
13
13
12
12
11
11

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

96
95
93
93
93
92
93
92
90
89
89
87
89
89
89
86
89
92
89
83
84
86
84
85

Pressure (mb)

1005
1005
1004
1003
1002
1001
1000
999
998
997
997
996
995
995
995
995
996
997
998
999
1001
1002
1003
1004

Ozone (du)

325
319
308
302
300
297
292
290
288
288
287
287
287
287
287
289
289
287
286
287
289
290
292
293

Tuesday 9

Waning Gibbous 67%

21:40

12:17

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
18 OK

Sun - Rise: 08:10, Set: 16:16, Transit: 12:13. Moon - Rise: 21:40, Set: 12:17. Civil Dark: 16:54 - 07:31. Nautical Dark: 17:36 - 06:49. Astro Dark: 18:16 - 06:10

Total Clouds (% Sky Obscured)

52
53
32
42
50
54
54
51
56
58
66
75
68
61
49
51
53
45
53
50
54
48
42
37

Low Clouds (% Sky Obscured)

43
45
32
42
50
54
54
51
56
58
56
60
59
55
49
51
53
43
53
50
54
48
42
37

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
1
16
21
21
8
0
0
0
2
0
0
0
0
0
0

High Clouds (% Sky Obscured)

52
53
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
5
2
3

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
7
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 (%)

1
1
2
7
20
16
7
11
14
11
26
42
35
31
8
6
3
0
0
0
0
2
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
8
8
8
9
8
8
7

Relative Humidity (%)

87
87
88
90
88
90
88
90
90
90
90
90
91
93
91
87
83
80
79
80
84
88
90
90

Pressure (mb)

1005
1006
1007
1007
1007
1008
1008
1008
1009
1009
1010
1010
1011
1012
1014
1015
1015
1016
1017
1017
1018
1018
1019
1020

Ozone (du)

292
293
295
296
298
297
297
302
303
303
303
302
304
304
305
310
319
319
316
313
310
308
312
310

Wednesday 10

Waning Gibbous 56%

22:59

12:30

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

Sun - Rise: 08:11, Set: 16:16, Transit: 12:13. Moon - Rise: 22:59, Set: 12:30. Civil Dark: 16:54 - 07:32. Nautical Dark: 17:36 - 06:50. Astro Dark: 18:16 - 06:11

Total Clouds (% Sky Obscured)

37
33
25
21
22
24
46
39
32
44
46
15
29
43
76
77
78
75
95
100
100
100
99
100

Low Clouds (% Sky Obscured)

37
33
25
21
22
24
46
39
32
44
46
15
29
43
76
66
64
59
51
46
49
50
51
54

Medium Clouds (% Sky Obscured)

4
5
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
1
3
6
62
79
85
92

High Clouds (% Sky Obscured)

4
5
4
6
10
7
26
4
4
6
4
2
0
0
55
74
60
75
95
100
100
61
64
49

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
2
3
5
10
17
17
18
18
19
31
37

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)

4
4
4
5
5
7
9
9
11
12
13
14
13
12
14
15
16
17
16
16
17
17
18
18

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

90
90
88
88
90
88
88
88
90
88
87
90
88
90
91
91
87
86
84
87
88
91
92
90

Pressure (mb)

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

Ozone (du)

309
308
307
307
306
305
306
306
307
307
307
310
315
317
318
316
316
313
308
306
307
310
313
313

Thursday 11

Third Quarter 46%

00:13

12:42

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
18 Bad

Sun - Rise: 08:12, Set: 16:16, Transit: 12:14. Moon - Rise: 00:13, Set: 12:42. Civil Dark: 16:54 - 07:33. Nautical Dark: 17:36 - 06:51. Astro Dark: 18:16 - 06:11

Total Clouds (% Sky Obscured)

99
100
100
100
100
100
100
100
100
100
100
100
100
57
87
74
100
93
86
79
82
82
82
88

Low Clouds (% Sky Obscured)

57
59
68
76
85
89
92
95
91
87
84
72
58
17
8
11
16
19
20
21
20
19
20
25

Medium Clouds (% Sky Obscured)

94
100
100
84
92
100
100
100
100
100
100
98
90
22
20
20
20
13
8
0
0
0
15
17

High Clouds (% Sky Obscured)

44
67
73
85
100
88
93
100
100
90
100
100
21
25
87
74
100
90
80
60
45
45
35
53

ISS Passover

Visibility (miles)

9
9
9
9
9
5
5
3
3
3
3
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
Very Light Rain
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

Precipitation Probability (%)

36
35
47
37
63
91
95
95
95
95
95
81
38
4
1
0
0
0
2
0
5
9
13
29

Precipitation Amount (mm)

0
0
0
0
0.3
0.6
0.9
1.2
1.9
1.9
1.1
0.4
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

18
17
16
15
13
14
15
14
14
8
6
12
10
8
6
5
6
6
7
8
9
9
10
11

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

87
83
87
90
88
90
93
93
95
93
93
91
90
88
88
84
78
73
69
69
73
78
81
84

Pressure (mb)

1009
1009
1008
1008
1008
1008
1007
1007
1007
1007
1008
1008
1009
1009
1010
1011
1011
1011
1011
1011
1011
1011
1011
1011

Ozone (du)

318
321
324
327
328
329
331
333
334
336
339
340
341
339
337
338
338
339
341
340
339
338
335
337

Friday 12

Waning Crescent 36%

01:24

12:53

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
18 Bad

Sun - Rise: 08:13, Set: 16:16, Transit: 12:14. Moon - Rise: 01:24, Set: 12:53. Civil Dark: 16:54 - 07:34. Nautical Dark: 17:36 - 06:52. Astro Dark: 18:16 - 06:12

Total Clouds (% Sky Obscured)

94
100
95
85
75
81
85
82
51
56
59
42
71
100
93
88
82
84
88
93
95
98
100
100

Low Clouds (% Sky Obscured)

30
35
32
33
32
34
40
38
51
56
59
19
27
36
39
42
44
54
64
70
75
76
78
77

Medium Clouds (% Sky Obscured)

48
100
87
36
48
47
14
10
18
23
31
35
67
99
92
85
79
79
80
84
87
89
92
94

High Clouds (% Sky Obscured)

75
100
73
47
30
42
44
55
29
14
0
18
43
70
50
25
0
5
10
16
40
65
93
80

ISS Passover

Visibility (miles)

6
7
9
9
9
9
9
9
9
8
8
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
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

36
31
69
95
95
95
69
18
23
27
33
30
35
44
48
49
46
46
44
40
40
37
29
41

Precipitation Amount (mm)

0
0
0.4
0.7
0.9
0.7
0.4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

13
15
17
15
14
14
12
10
8
9
9
9
8
10
11
14
17
19
18
18
17
17
17
18

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

6
6
6
6
6
6
6
5
6
6
6
6
5
5
5
4
5
4
6
6
5
5
5
5

Dew Point (°C)

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

Relative Humidity (%)

87
90
85
85
81
81
80
79
79
82
82
81
84
87
90
87
84
81
82
85
87
88
90
91

Pressure (mb)

1011
1011
1011
1011
1011
1010
1011
1011
1011
1011
1011
1011
1016
1016
1016
1016
1016
1015
1015
1015
1015
1015
1015
1014

Ozone (du)

338
344
354
363
369
373
377
388
396
405
407
407
400
393
386
382
378
375
368
361
354
350
345
341

Saturday 13

Waning Crescent 27%

02:35

13:06

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
18 Bad

Sun - Rise: 08:13, Set: 16:16, Transit: 12:15. Moon - Rise: 02:35, Set: 13:06. Civil Dark: 16:55 - 07:35. Nautical Dark: 17:37 - 06:53. Astro Dark: 18:16 - 06:13

Total Clouds (% Sky Obscured)

99
98
99
99
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
99
99
99
99

Low Clouds (% Sky Obscured)

79
83
85
81
74
77
78
81
77
72
69
77
86
95
97
99
100
100
100
100
98
96
93
86

Medium Clouds (% Sky Obscured)

96
97
93
88
81
69
59
49
56
68
61
47
34
25
49
72
90
84
77
70
65
60
59
64

High Clouds (% Sky Obscured)

64
46
63
81
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
99
91
86
81
88

ISS Passover

Visibility (miles)

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

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

Precipitation Probability (%)

51
59
69
73
67
61
58
62
71
74
70
59
56
73
89
95
95
85
67
52
63
70
81
95

Precipitation Amount (mm)

0
0.2
0.3
0.4
0.3
0.3
0.3
0.3
0.4
0.5
0.4
0.2
0
0.4
0.5
0.9
0.9
0.4
0.2
0
0
0.2
0.4
0.8

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

10
10
10
10
10
10
10
10
10
11
11
11
11
11
11
12
12
12
12
12
12
12
12
12

Relative Humidity (%)

93
92
92
92
90
90
90
90
90
92
92
93
93
95
95
96
95
95
96
96
96
96
96
96

Pressure (mb)

1015
1015
1015
1015
1014
1014
1014
1013
1012
1012
1011
1010
1010
1010
1010
1010
1010
1009
1009
1008
1007
1007
1006
1006

Ozone (du)

338
334
331
327
322
318
316
314
313
313
314
314
315
316
317
315
312
310
306
302
298
297
295
294

Sunday 14

Waning Crescent 19%

03:45

13:20

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

Sun - Rise: 08:14, Set: 16:16, Transit: 12:15. Moon - Rise: 03:45, Set: 13:20. Civil Dark: 16:55 - 07:35. Nautical Dark: 17:37 - 06:53. Astro Dark: 18:17 - 06:14

Total Clouds (% Sky Obscured)

100
100
93
87
80
87
94
96
81
62
43
31
23
17
49
76
97

Low Clouds (% Sky Obscured)

79
73
62
44
30
48
53
56
48
35
26
16
9
2
21
40
59

Medium Clouds (% Sky Obscured)

74
82
59
35
11
10
9
9
32
57
43
31
23
17
49
76
96

High Clouds (% Sky Obscured)

94
100
80
57
25
25
15
10
35
62
43
31
23
17
49
58
64

ISS Passover

Visibility (miles)

5
7
9
9
8
7
8
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

Precipitation Type

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

Precipitation Probability (%)

95
95
95
71
21
21
22
19
10
6
2
8
15
20
63
95
95

Precipitation Amount (mm)

1.1
1.3
0.8
0.4
0
0
0
0
0
0
0
0
0
0
0.3
0.9
2.7

Wind Speed/Direction (mph)

16
12
10
12
13
15
15
16
16
16
17
17
17
17
17
20
22

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

93
90
88
90
90
90
87
87
85
81
78
74
74
75
75
75
76

Pressure (mb)

1006
1006
1006
1007
1007
1007
1008
1008
1009
1009
1009
1009
1009
1009
1009
1009
1008

Ozone (du)

295
297
299
299
300
300
307
313
319
324
329
334
331
328
325
325
326

Forecast for Mawgan Porth, Cornwall, United Kingdom (50.46,-5.03)

Generated: 08/12/25 19:41:42. Forecast: 08/12/25 to 14/12/25. Timezone: UTC+0.00