Clear Outside v1.0 - International Weather Forecasts For Astronomers

Sunday 21

Waxing Crescent 6%

10:15

18:02

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
19 Bad
20 Bad
21 Bad

Sun - Rise: 08:06, Set: 15:56, Transit: 12:01. Moon - Rise: 10:15, Set: 18:02. Civil Dark: 16:36 - 07:26. Nautical Dark: 17:20 - 06:43. Astro Dark: 18:00 - 06:02

Total Clouds (% Sky Obscured)

91
93
95
100
100
83
91
100
99
90
96
100
100
100
100
100
97
95
100
100
100
99
94
97

Low Clouds (% Sky Obscured)

81
82
93
65
58
68
74
88
98
67
91
42
43
38
42
63
74
63
68
67
64
64
59
55

Medium Clouds (% Sky Obscured)

91
93
90
89
96
81
18
55
25
66
54
50
15
41
20
44
25
46
86
66
69
73
92
95

High Clouds (% Sky Obscured)

91
93
95
100
100
63
84
100
93
82
66
100
68
88
100
100
72
78
99
69
81
98
68
73

ISS Passover

Visibility (miles)

4
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

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

Precipitation Probability (%)

78
95
95
20
2
4
6
6
7
10
5
0
2
1
0
1
0
1
1
0
0
0
0
0

Precipitation Amount (mm)

0.3
1.2
1.2
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
11
11
12
11
11
9
7
6
5
5
5
6
6
6
6
5
6
5
6
6

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

90
90
93
85
90
85
87
90
90
90
91
91
91
93
93
88
88
90
91
93
93
93
93
91

Pressure (mb)

1004
1004
1004
1003
1004
1004
1004
1004
1005
1006
1007
1007
1008
1008
1008
1008
1009
1009
1009
1010
1010
1011
1011
1012

Ozone (du)

361
365
368
369
375
376
374
374
375
378
379
380
382
383
387
389
389
388
386
382
381
379
377
372

Monday 22

Waxing Crescent 12%

10:37

19:20

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
19 Bad
20 Bad
21 Bad

Sun - Rise: 08:07, Set: 15:57, Transit: 12:02. Moon - Rise: 10:37, Set: 19:20. Civil Dark: 16:37 - 07:26. Nautical Dark: 17:20 - 06:43. Astro Dark: 18:01 - 06:03

Total Clouds (% Sky Obscured)

99
99
96
100
99
98
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

81
88
81
76
78
84
96
96
93
97
100
100
100
100
94
100
100
100
100
100
100
100
100
100

Medium Clouds (% Sky Obscured)

74
79
93
92
93
74
77
77
70
47
25
29
34
38
69
18
29
27
29
28
32
17
2
8

High Clouds (% Sky Obscured)

92
77
76
46
92
72
99
100
100
87
46
80
100
100
100
98
99
67
6
7
2
21
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
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2
0
1
2

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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

90
90
88
90
88
88
88
88
91
91
93
91
90
90
85
85
84
81
79
82
86
88
88
85

Pressure (mb)

1012
1012
1012
1013
1013
1013
1013
1013
1014
1014
1015
1016
1016
1017
1017
1017
1017
1018
1019
1020
1020
1021
1022
1023

Ozone (du)

365
363
361
359
357
356
354
353
354
353
349
346
345
346
348
350
353
354
353
353
354
354
353
351

Tuesday 23

Waxing Crescent 19%

10:54

20:38

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 OK
12 OK
13 OK
14 OK
15 Bad
16 OK
17 OK
18 OK
19 OK
20 OK
21 OK

Sun - Rise: 08:07, Set: 15:58, Transit: 12:02. Moon - Rise: 10:54, Set: 20:38. Civil Dark: 16:38 - 07:27. Nautical Dark: 17:21 - 06:44. Astro Dark: 18:02 - 06:03

Total Clouds (% Sky Obscured)

100
100
95
87
89
89
96
85
72
70
69
62
49
41
32
41
42
47
35
41
40
38
35
35

Low Clouds (% Sky Obscured)

100
100
95
87
89
88
95
84
72
70
69
62
49
41
32
41
42
47
35
39
40
38
31
33

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
1
2
0
2
3
1
1
2
2
1
1
2
1
0
0
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 (%)

7
8
7
4
5
7
8
4
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)

14
14
14
14
15
16
15
15
14
14
15
15
15
16
16
16
16
16
16
15
16
16
15
15

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

83
85
86
90
88
82
82
80
82
83
80
80
80
78
76
72
72
75
76
76
74
79
74
76

Pressure (mb)

1023
1024
1025
1025
1026
1027
1027
1027
1028
1029
1030
1031
1032
1032
1032
1032
1032
1032
1033
1033
1033
1033
1033
1033

Ozone (du)

347
343
338
335
331
329
327
326
329
331
329
325
322
324
326
327
328
329
328
331
331
333
335
336

Wednesday 24

Waxing Crescent 28%

11:07

21:56

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

Sun - Rise: 08:07, Set: 15:58, Transit: 12:03. Moon - Rise: 11:07, Set: 21:56. Civil Dark: 16:38 - 07:27. Nautical Dark: 17:21 - 06:44. Astro Dark: 18:02 - 06:03

Total Clouds (% Sky Obscured)

39
42
40
34
31
32
30
30
41
52
63
61
58
63
55
43
32
28
25
22
17
12
7
5

Low Clouds (% Sky Obscured)

37
39
40
34
31
32
30
30
41
52
63
61
58
60
50
39
29
28
25
21
16
12
7
5

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
2
1
0

High 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

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
1
1
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)

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

Chance of Frost

Temperature (°C)

2
2
2
2
2
2
2
2
2
2
2
2
3
4
4
4
4
4
3
3
2
2
2
2

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

76
77
79
77
80
78
77
74
69
65
60
57
55
54
55
59
62
66
68
69
72
73
74
77

Pressure (mb)

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

Ozone (du)

336
338
338
338
339
340
345
348
353
353
353
353
353
353
354
354
354
354
356
358
360
358
358
358

Thursday 25

Waxing Crescent 39%

11:19

21:56

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

Sun - Rise: 08:07, Set: 15:59, Transit: 12:03. Moon - Rise: 11:19, Set: 21:56. Civil Dark: 16:39 - 07:27. Nautical Dark: 17:22 - 06:44. Astro Dark: 18:03 - 06:04

Total Clouds (% Sky Obscured)

3
1
1
1
1
1
0
0
3
5
7
5
4
5
0
0
5
5
5
20
35
50
62
58

Low Clouds (% Sky Obscured)

3
1
1
1
0
0
0
0
3
5
7
5
3
0
0
0
0
0
0
0
17
34
51
51

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
5
5
5
20
35
50
57
38

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
1
5
0
0
5
5
5
20
35
30
1
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

78
81
84
84
84
84
84
88
86
86
88
88
83
80
79
80
82
82
83
85
86
86
88
86

Pressure (mb)

1030
1030
1030
1030
1030
1030
1030
1030
1030
1031
1032
1032
1032
1032
1032
1032
1032
1033
1033
1034
1034
1035
1035
1036

Ozone (du)

356
356
355
353
351
352
350
350
352
353
352
354
355
355
355
356
357
358
357
357
356
356
355
355

Friday 26

Waxing Crescent 50%

11:30

23:15

22 Bad
23 Bad
00 Bad
01 OK
02 OK
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

Sun - Rise: 08:08, Set: 16:00, Transit: 12:04. Moon - Rise: 11:30, Set: 23:15. Civil Dark: 16:40 - 07:28. Nautical Dark: 17:23 - 06:45. Astro Dark: 18:04 - 06:04

Total Clouds (% Sky Obscured)

55
51
47
43
38
49
61
65
67
64
65
65
66
72
81
84
90
90
91
93
91
89
88
87

Low Clouds (% Sky Obscured)

51
51
47
42
37
43
49
49
49
51
54
59
66
72
80
83
84
88
91
93
91
89
88
87

Medium Clouds (% Sky Obscured)

21
0
1
1
1
6
11
11
3
3
0
0
0
0
2
8
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
0
0
0
0
0
2
10
15
19
18
20

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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

1
1
1
0
0
-1
-1
-1
-1
0
1
2
3
4
4
4
4
4
4
5
6
5
5
4

Relative Humidity (%)

86
86
88
85
83
80
79
75
72
76
80
86
86
85
85
84
81
79
84
88
93
91
91
90

Pressure (mb)

1036
1036
1036
1037
1037
1037
1037
1037
1038
1038
1039
1039
1039
1039
1039
1039
1039
1039
1040
1040
1040
1040
1041
1041

Ozone (du)

353
351
350
349
349
349
347
345
344
341
339
336
333
330
327
324
321
318
316
314
311
311
311
310

Saturday 27

First Quarter 61%

11:43

00:35

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 OK
17 OK

Sun - Rise: 08:08, Set: 16:01, Transit: 12:04. Moon - Rise: 11:43, Set: 00:35. Civil Dark: 16:41 - 07:28. Nautical Dark: 17:24 - 06:45. Astro Dark: 18:04 - 06:04

Total Clouds (% Sky Obscured)

86
85
78
71
64
64
65
65
70
75
76
75
74
76
70
62
54
46
31
33

Low Clouds (% Sky Obscured)

86
85
78
71
63
63
64
60
62
62
67
70
73
75
70
62
54
46
31
33

Medium Clouds (% Sky Obscured)

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

High Clouds (% Sky Obscured)

21
23
25
22
17
8
7
3
3
2
1
2
2
3
2
1
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

Fog (%)

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

Precipitation Probability (%)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

4
4
4
4
4
3
3
3
3
3
3
3
4
4
4
4
5
5
4
4

Relative Humidity (%)

91
91
93
94
94
93
93
94
94
94
94
94
93
90
86
88
88
90
90
91

Pressure (mb)

1041
1041
1041
1041
1040
1040
1040
1040
1040
1040
1040
1041
1040
1040
1040
1039
1039
1038
1039
1039

Ozone (du)

309
308
306
305
305
304
303
303
303
303
303
302
303
304
305
303
302
300
299
297

Forecast for Bray Court, Windsor and Maidenhead, United Kingdom (51.50,-0.70)

Generated: 21/12/25 22:15:12. Forecast: 21/12/25 to 27/12/25. Timezone: UTC+0.00