Clear Outside v1.0 - International Weather Forecasts For Astronomers

Saturday 27

First Quarter 50%

11:35

00:39

08 Good
09 Good
10 OK
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: 08:11, Set: 16:04, Transit: 12:08. Moon - Rise: 11:35, Set: 00:39. Civil Dark: 16:44 - 07:32. Nautical Dark: 17:27 - 06:49. Astro Dark: 18:08 - 06:08

Total Clouds (% Sky Obscured)

0
12
43
52
81
73
83
84
94
82
65
70
86
92
94
77
92
92
75
82
81
67
75
73

Low Clouds (% Sky Obscured)

0
12
43
52
73
66
79
84
94
82
65
70
86
92
94
77
89
86
75
82
78
65
58
53

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

0
2
10
4
4
4
3
3
0
0
0
2
2
3
60
32
19
22
30
31
13
7
36
35

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)

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

Chance of Frost

Temperature (°C)

1
1
3
4
5
5
6
6
6
6
6
6
5
5
5
5
5
5
5
5
4
4
4
3

Feels Like (°C)

-3
-3
-2
-1
-0
1
1
1
-0
0
0
0
-1
-0
-0
0
1
0
0
1
1
0
-0
-1

Dew Point (°C)

-1
-1
1
2
3
3
4
5
4
4
4
4
3
3
3
3
3
2
4
4
4
4
3
3

Relative Humidity (%)

86
83
85
85
85
85
88
93
88
85
86
85
83
83
83
82
82
80
90
96
98
98
98
96

Pressure (mb)

1034
1035
1035
1035
1034
1033
1033
1033
1034
1034
1034
1034
1034
1034
1034
1034
1034
1034
1034
1034
1034
1033
1033
1033

Ozone (du)

321
319
317
311
309
308
307
307
307
308
311
313
315
316
316
314
312
311
311
310
310
310
312
315

Sunday 28

Waxing Gibbous 61%

11:47

02:03

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 OK
07 OK

Sun - Rise: 08:11, Set: 16:05, Transit: 12:08. Moon - Rise: 11:47, Set: 02:03. Civil Dark: 16:45 - 07:32. Nautical Dark: 17:28 - 06:49. Astro Dark: 18:09 - 06:08

Total Clouds (% Sky Obscured)

77
85
73
60
62
64
71
68
77
90
83
73
81
68
76
64
67
71
65
52
45
44
37
36

Low Clouds (% Sky Obscured)

59
72
48
50
62
62
67
62
63
85
77
72
77
59
69
57
67
65
57
42
39
39
32
35

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

19
40
36
13
21
10
45
62
50
33
37
28
26
34
56
53
37
16
16
15
9
7
6
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
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)

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

Chance of Frost

Temperature (°C)

3
3
4
5
5
6
6
6
5
4
4
4
4
4
3
3
2
2
1
1
1
1
1
1

Feels Like (°C)

-1
-1
-1
0
0
1
1
1
0
-1
-1
-1
-1
-2
-2
-2
-2
-2
-2
-2
-2
-2
-2
-2

Dew Point (°C)

3
3
3
2
2
3
2
2
1
1
1
1
0
-1
-1
-2
-1
-1
0
-0
0
-0
-0
-0

Relative Humidity (%)

98
96
93
85
80
79
78
76
76
76
76
76
76
73
73
74
80
86
91
93
94
94
94
94

Pressure (mb)

1034
1034
1034
1033
1033
1032
1031
1031
1030
1030
1030
1030
1030
1029
1029
1029
1029
1028
1028
1028
1028
1028
1028
1028

Ozone (du)

317
318
316
315
316
316
318
319
317
317
318
318
315
313
311
310
308
308
307
306
304
304
301
300

Monday 29

Waxing Gibbous 72%

12:02

03:32

08 OK
09 Bad
10 Bad
11 Bad
12 OK
13 OK
14 OK
15 OK
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: 08:12, Set: 16:06, Transit: 12:09. Moon - Rise: 12:02, Set: 03:32. Civil Dark: 16:46 - 07:32. Nautical Dark: 17:29 - 06:49. Astro Dark: 18:09 - 06:08

Total Clouds (% Sky Obscured)

39
48
61
68
29
38
26
26
66
80
84
84
90
89
87
87
92
82
66
78
87
74
78
84

Low Clouds (% Sky Obscured)

39
48
61
68
29
38
26
26
66
79
82
79
88
85
84
81
90
79
48
78
87
65
73
82

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
8
18
13
16
22
29
24
21

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

Chance of Frost

Temperature (°C)

1
1
1
2
3
4
5
4
3
3
4
4
4
4
4
4
4
4
3
3
3
3
3
3

Feels Like (°C)

-2
-1
-1
-1
-1
1
1
1
1
-1
-2
-2
-2
-1
-1
-1
-1
-2
-2
-1
-2
-3
-3
-3

Dew Point (°C)

0
0
0
1
1
2
2
2
1
1
-1
-1
0
0
-0
-1
0
2
2
2
-0
-3
-4
-4

Relative Humidity (%)

96
98
93
88
83
83
80
82
86
86
73
75
77
76
75
75
77
86
89
93
79
65
63
62

Pressure (mb)

1028
1028
1029
1029
1028
1028
1028
1028
1028
1028
1029
1029
1030
1030
1030
1031
1031
1031
1032
1032
1032
1032
1033
1033

Ozone (du)

299
296
297
298
297
296
295
294
294
293
289
286
283
281
280
279
277
279
280
282
281
282
281
285

Tuesday 30

Waxing Gibbous 82%

12:22

05:05

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

Sun - Rise: 08:12, Set: 16:07, Transit: 12:09. Moon - Rise: 12:22, Set: 05:05. Civil Dark: 16:47 - 07:32. Nautical Dark: 17:30 - 06:49. Astro Dark: 18:10 - 06:08

Total Clouds (% Sky Obscured)

90
84
79
71
68
61
44
22
16
14
26
15
18
13
10
6
3
2
1
11
22
33
32
30

Low Clouds (% Sky Obscured)

90
83
74
64
50
36
25
15
7
0
7
14
18
13
7
2
2
1
1
10
19
30
30
28

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

11
2
1
1
5
7
12
9
8
9
9
2
0
0
0
1
0
0
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
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)

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

Chance of Frost

Temperature (°C)

3
3
4
4
4
5
5
4
3
2
2
1
1
1
1
0
0
-0
-1
-1
-1
-1
-1
-0

Feels Like (°C)

-3
-3
-2
-1
-0
-0
-0
1
2
0
-1
-1
-1
-1
-1
-1
-1
-2
-2
-2
-2
-2
-2
-2

Dew Point (°C)

-4
-3
-3
-2
-2
-1
-1
1
1
1
0
0
-0
-0
-1
-1
-1
-2
-2
-2
-2
-3
-2
-2

Relative Humidity (%)

62
63
61
63
66
66
68
76
86
89
89
91
91
93
91
91
91
91
91
91
87
86
87
89

Pressure (mb)

1034
1035
1035
1035
1035
1035
1035
1035
1035
1035
1035
1035
1035
1035
1035
1035
1035
1034
1034
1034
1033
1033
1032
1032

Ozone (du)

286
286
288
293
295
295
297
299
307
308
310
311
311
315
310
308
310
311
315
316
319
319
320
319

Wednesday 31

Waxing Gibbous 91%

12:50

06:34

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

Sun - Rise: 08:11, Set: 16:08, Transit: 12:10. Moon - Rise: 12:50, Set: 06:34. Civil Dark: 16:48 - 07:32. Nautical Dark: 17:31 - 06:49. Astro Dark: 18:11 - 06:08

Total Clouds (% Sky Obscured)

28
27
27
25
21
17
13
19
26
32
31
30
29
42
51
63
58
49
41
58
76
93
96
98

Low Clouds (% Sky Obscured)

27
26
27
25
21
17
13
19
26
32
31
30
29
41
51
63
54
43
34
48
65
81
75
69

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
2
6
9
14
23
25
30
36
48

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
1
0
0
0
0
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)

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

Chance of Frost

Temperature (°C)

-0
0
1
2
3
4
4
3
2
2
1
1
1
1
1
1
1
1
2
2
2
3
3
3

Feels Like (°C)

-2
-2
-1
0
0
1
1
2
1
1
0
-1
-1
-0
-1
-1
-1
-2
-1
-2
-2
-2
-2
-2

Dew Point (°C)

-2
-2
-2
-1
0
1
1
2
2
1
1
0
0
-0
-1
-1
-1
-1
-1
-0
0
1
2
1

Relative Humidity (%)

89
86
83
82
80
80
83
88
94
94
94
94
93
93
91
91
91
89
86
85
86
88
91
89

Pressure (mb)

1032
1032
1032
1032
1031
1031
1030
1030
1030
1030
1030
1030
1029
1029
1028
1028
1027
1027
1026
1025
1024
1024
1023
1022

Ozone (du)

315
311
310
311
313
314
317
321
321
319
316
315
314
315
314
317
319
320
320
320
319
318
317
318

Thursday 1

Waxing Gibbous 97%

13:32

07:51

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 OK
05 OK
06 OK
07 Good

Sun - Rise: 08:11, Set: 16:09, Transit: 12:10. Moon - Rise: 13:32, Set: 07:51. Civil Dark: 16:49 - 07:32. Nautical Dark: 17:31 - 06:49. Astro Dark: 18:12 - 06:08

Total Clouds (% Sky Obscured)

100
91
82
70
76
82
88
92
96
99
96
90
82
67
56
53
51
50
47
45
41
39
28
18

Low Clouds (% Sky Obscured)

63
63
63
65
72
80
87
76
63
51
60
71
81
64
55
46
45
43
39
39
38
36
25
14

Medium Clouds (% Sky Obscured)

0
0
0
0
0
1
1
4
7
11
9
12
20
14
9
1
1
0
0
0
0
0
0
1

High Clouds (% Sky Obscured)

63
58
38
12
16
19
21
44
67
90
67
46
21
15
9
2
2
2
3
5
4
10
10
9

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
2
5
8
9
10
10
13
14
14
17
25
35
40
37
26
19
11
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
9
10
11
13
14
15
16
16
16
16
16
15
14
13
12
11
11
11
11
10
10
10
9

Chance of Frost

Temperature (°C)

3
3
4
4
5
5
5
5
5
5
4
4
3
3
3
3
3
3
2
2
1
1
1
1

Feels Like (°C)

-2
-2
-2
-2
-2
-1
-1
-1
-1
-1
-1
-2
-2
-2
-2
-1
-1
-2
-3
-3
-3
-3
-4
-3

Dew Point (°C)

1
1
1
2
2
2
2
2
2
1
1
1
1
0
0
0
1
0
-1
-1
-1
-2
-2
-2

Relative Humidity (%)

88
85
83
82
80
80
80
79
79
79
77
80
82
82
83
83
85
83
83
84
83
83
83
84

Pressure (mb)

1022
1021
1020
1020
1019
1018
1017
1016
1016
1016
1016
1016
1016
1016
1016
1017
1017
1017
1018
1018
1019
1019
1019
1020

Ozone (du)

319
319
318
317
316
316
317
318
324
331
338
345
353
361
360
360
360
358
356
354
348
342
336
326

Friday 2

Waxing Gibbous 100%

14:34

No Set

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

Sun - Rise: 08:11, Set: 16:10, Transit: 12:11. Moon - Rise: 14:34, Set: No Set. Civil Dark: 16:50 - 07:32. Nautical Dark: 17:32 - 06:49. Astro Dark: 18:13 - 06:08

Total Clouds (% Sky Obscured)

7
6
7
7
29
50
72
48
25
1
33
64
86
67
54
42
43
41
38
36
36
37

Low Clouds (% Sky Obscured)

4
4
4
4
22
40
58
39
19
0
25
47
67
57
51
42
38
31
21
32
36
37

Medium Clouds (% Sky Obscured)

1
2
2
2
5
8
12
7
4
0
5
7
15
14
9
1
7
14
28
19
9
0

High Clouds (% Sky Obscured)

7
6
7
7
21
13
7
3
4
1
6
5
3
2
2
1
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
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

Precipitation Type

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
1
1
8
12
15
12
9
2
1
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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

1
0
1
2
3
3
3
3
3
2
1
0
0
-0
-0
0
0
1
1
1
1
1

Feels Like (°C)

-3
-3
-3
-4
-4
1
-0
0
0
-0
-0
-2
-2
-2
-2
-2
-2
-1
-1
-1
-2
-2

Dew Point (°C)

-2
-2
-2
-2
-2
-1
-1
0
-0
-1
-1
-2
-2
-2
-2
-2
-2
-1
-1
-1
-1
-1

Relative Humidity (%)

86
86
80
74
69
72
75
79
82
84
89
88
87
87
87
86
86
88
88
89
88
89

Pressure (mb)

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

Ozone (du)

316
307
302
296
291
289
288
286
285
285
284
286
288
290
291
293
294
298
302
305
305
305

Forecast for Marlborough, Wiltshire, United Kingdom (51.42,-1.73)

Generated: 27/12/25 08:58:14. Forecast: 27/12/25 to 02/01/26. Timezone: UTC+0.00