Clear Outside v1.0 - International Weather Forecasts For Astronomers

Sunday 21

Waxing Crescent 2%

10:16

16:49

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
08 Bad
09 Bad
10 Bad
11 Bad

Sun - Rise: 08:07, Set: 15:57, Transit: 12:02. Moon - Rise: 10:16, Set: 16:49. Civil Dark: 16:37 - 07:27. Nautical Dark: 17:20 - 06:44. Astro Dark: 18:01 - 06:03

Total Clouds (% Sky Obscured)

100
100
83
100
100
100
100
100
100
100
100
100
100
100
95
91
100
100
100
89
85
100
100
85

Low Clouds (% Sky Obscured)

83
57
74
65
82
82
94
90
88
92
75
80
83
82
81
71
73
81
100
89
77
72
73
46

Medium Clouds (% Sky Obscured)

65
76
93
100
100
100
86
93
86
98
100
100
100
88
86
36
26
42
82
3
75
6
5
13

High Clouds (% Sky Obscured)

65
78
71
91
100
100
100
100
100
100
100
100
100
100
87
84
100
100
90
68
71
66
53
72

ISS Passover

Visibility (miles)

-
-
-
-
-
9
6
9
8
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

Precipitation Type

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

Precipitation Probability (%)

0
0
0
0
100
77
64
60
41
45
49
58
59
41
6
7
5
7
7
2
2
2
2
2

Precipitation Amount (mm)

0
0
0
0
0.3
0.3
0.2
0.5
0
0
0
0.2
0.3
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

8
10
10
9
11
9
10
11
11
14
15
15
13
13
13
12
10
11
10
10
9
8
7
7

Chance of Frost

Temperature (°C)

10
10
10
10
9
9
9
10
10
10
10
10
10
10
10
10
9
9
9
9
9
9
9
10

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

89
87
89
91
93
95
95
96
93
91
91
88
90
88
91
91
93
93
91
91
91
93
91
90

Pressure (mb)

1007
1007
1006
1006
1006
1005
1005
1004
1004
1004
1004
1004
1004
1004
1004
1004
1004
1004
1005
1006
1007
1007
1008
1008

Ozone (du)

325
331
339
347
350
354
353
357
361
369
372
376
377
379
382
381
380
380
380
381
381
381
383
384

Monday 22

Waxing Crescent 6%

10:38

18:04

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
08 Bad
09 Bad
10 Bad
11 Bad

Sun - Rise: 08:07, Set: 15:58, Transit: 12:02. Moon - Rise: 10:38, Set: 18:04. Civil Dark: 16:38 - 07:27. Nautical Dark: 17:21 - 06:44. Astro Dark: 18:02 - 06:04

Total Clouds (% Sky Obscured)

85
71
98
94
90
92
85
93
87
97
98
100
99
89
95
99
96
98
100
100
100
100
99
100

Low Clouds (% Sky Obscured)

44
57
79
84
64
56
27
59
68
87
81
74
73
78
89
99
91
90
100
100
100
100
98
100

Medium Clouds (% Sky Obscured)

7
13
18
20
45
81
43
81
70
30
33
46
87
42
22
16
33
32
32
14
29
29
25
36

High Clouds (% Sky Obscured)

73
21
89
80
75
78
82
36
54
48
59
88
34
16
34
27
35
50
55
50
35
21
6
16

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
2
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
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

9
9
9
9
9
9
8
7
7
7
7
6
6
6
5
5
5
4
4
4
4
5
5
5

Relative Humidity (%)

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

Pressure (mb)

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

Ozone (du)

387
390
391
391
389
385
384
382
378
373
369
366
364
361
358
354
353
353
353
351
348
344
345
344

Tuesday 23

Waxing Crescent 12%

10:55

19:21

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
08 Bad
09 Bad
10 Bad
11 Bad

Sun - Rise: 08:08, Set: 15:58, Transit: 12:03. Moon - Rise: 10:55, Set: 19:21. Civil Dark: 16:38 - 07:28. Nautical Dark: 17:21 - 06:45. Astro Dark: 18:02 - 06:04

Total Clouds (% Sky Obscured)

100
100
99
96
96
95
92
99
95
84
81
88
86
85
83
90
90
91
88
70
68
76
66
61

Low Clouds (% Sky Obscured)

100
100
98
96
92
95
92
99
95
84
81
88
86
85
80
87
86
88
88
70
68
76
66
57

Medium Clouds (% Sky Obscured)

34
2
3
3
5
3
3
4
4
4
4
4
2
2
4
4
0
0
0
0
0
2
0
0

High Clouds (% Sky Obscured)

2
11
7
2
3
4
4
3
1
2
4
2
2
2
3
3
1
3
4
6
2
8
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
1
4
1
1
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)

12
12
12
13
14
13
13
13
13
12
12
12
12
12
13
14
14
15
14
13
13
13
14
15

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

87
87
87
87
85
88
93
93
93
93
94
93
94
96
93
91
89
88
89
89
89
86
83
82

Pressure (mb)

1018
1018
1019
1019
1020
1021
1022
1023
1023
1024
1025
1025
1025
1026
1027
1027
1027
1028
1028
1029
1030
1031
1031
1032

Ozone (du)

344
346
348
349
351
350
349
347
346
344
336
333
333
329
329
329
331
332
328
323
321
321
321
322

Wednesday 24

Waxing Crescent 19%

11:08

20:39

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

Sun - Rise: 08:08, Set: 15:59, Transit: 12:03. Moon - Rise: 11:08, Set: 20:39. Civil Dark: 16:39 - 07:28. Nautical Dark: 17:22 - 06:45. Astro Dark: 18:03 - 06:04

Total Clouds (% Sky Obscured)

53
43
33
35
36
40
46
47
50
54
52
53
46
34
23
14
8
3
1
1
1
4
8
11

Low Clouds (% Sky Obscured)

49
42
32
32
36
40
46
47
50
54
52
53
46
34
23
14
8
2
1
1
1
4
7
10

Medium Clouds (% Sky Obscured)

0
3
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
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
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)

15
15
15
15
15
15
15
15
15
15
15
15
14
15
15
15
15
15
15
15
16
17
18
19

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

79
79
80
80
79
80
80
80
80
79
80
80
80
77
77
77
77
77
77
77
77
73
66
61

Pressure (mb)

1032
1032
1032
1032
1033
1033
1034
1034
1034
1034
1034
1034
1034
1033
1033
1033
1032
1032
1031
1031
1031
1031
1030
1030

Ozone (du)

322
324
325
325
327
328
329
328
328
332
334
335
336
338
337
337
339
342
346
348
352
353
352
353

Thursday 25

Waxing Crescent 28%

11:20

21:57

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

Sun - Rise: 08:08, Set: 16:00, Transit: 12:04. Moon - Rise: 11:20, Set: 21:57. Civil Dark: 16:40 - 07:28. Nautical Dark: 17:23 - 06:45. Astro Dark: 18:03 - 06:05

Total Clouds (% Sky Obscured)

7
4
0
0
0
1
13
25
36
39
43
44
43
42
41
45
52
54
89
89
89
93
96
100

Low Clouds (% Sky Obscured)

7
3
0
0
0
1
12
23
36
39
43
44
43
42
41
45
49
51
85
87
89
93
96
100

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
20
25
39
51
44
34
19
1

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
6
12
13
14
15
15

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)

19
19
18
18
17
16
15
14
13
12
11
10
10
10
9
9
9
8
8
9
9
9
10
10

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

57
55
56
56
57
59
62
65
69
73
76
77
81
83
84
84
86
87
89
88
89
88
84
80

Pressure (mb)

1029
1029
1028
1028
1029
1029
1029
1029
1029
1030
1030
1029
1029
1029
1030
1030
1030
1030
1030
1029
1030
1030
1030
1030

Ozone (du)

354
353
353
353
353
354
356
356
355
355
358
358
357
357
358
361
363
361
360
361
361
361
359
358

Friday 26

Waxing Crescent 39%

11:32

23:16

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 OK
06 OK
07 OK
08 OK
09 OK
10 Good
11 Good

Sun - Rise: 08:08, Set: 16:00, Transit: 12:04. Moon - Rise: 11:32, Set: 23:16. Civil Dark: 16:40 - 07:29. Nautical Dark: 17:23 - 06:46. Astro Dark: 18:04 - 06:05

Total Clouds (% Sky Obscured)

96
93
89
88
88
88
87
86
85
84
83
82
80
75
72
57
41
26
20
19
15
10
5
5

Low Clouds (% Sky Obscured)

96
93
80
76
75
70
65
65
64
64
63
63
62
64
63
45
22
0
0
0
0
2
0
0

Medium Clouds (% Sky Obscured)

4
5
7
5
4
2
1
1
0
0
0
0
0
0
0
0
0
0
5
11
15
10
5
5

High Clouds (% Sky Obscured)

7
4
0
4
10
20
23
16
14
9
5
2
0
0
0
8
17
26
20
19
15
10
5
5

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

76
79
82
85
88
89
93
93
93
89
91
89
91
89
91
91
91
92
94
94
93
93
88
83

Pressure (mb)

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

Ozone (du)

356
355
354
353
353
353
354
355
356
357
357
358
359
359
359
360
360
360
360
361
362
363
364
365

Saturday 27

First Quarter 50%

11:44

00:36

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

Sun - Rise: 08:09, Set: 16:01, Transit: 12:05. Moon - Rise: 11:44, Set: 00:36. Civil Dark: 16:41 - 07:29. Nautical Dark: 17:24 - 06:46. Astro Dark: 18:05 - 06:05

Total Clouds (% Sky Obscured)

12
25
27
48
65
79
74
68
61
56
50
42
54
70
84
80
76
66
60
55
50
42
35
27

Low Clouds (% Sky Obscured)

5
10
15
29
43
57
51
48
43
37
31
25
35
44
51
39
28
17
16
10
9
6
4
0

Medium Clouds (% Sky Obscured)

12
11
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
0
0
0
0
0

High Clouds (% Sky Obscured)

12
10
6
19
31
40
32
27
23
26
29
32
16
5
5
4
4
3
3
6
5
11
18
24

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)

12
12
13
13
12
12
11
11
11
10
9
9
9
9
9
8
8
8
8
7
6
6
6
6

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

79
80
80
82
85
88
91
88
86
83
83
85
86
86
88
91
91
93
94
93
94
93
91
88

Pressure (mb)

1035
1035
1034
1034
1035
1035
1035
1035
1036
1036
1036
1036
1036
1036
1036
1036
1036
1036
1036
1036
1036
1037
1036
1036

Ozone (du)

366
364
361
358
356
353
351
350
349
348
347
346
345
343
342
341
338
336
334
330
326
322
320
318

Forecast for Reading, Reading, United Kingdom (51.45,-0.98)

Generated: 21/12/25 17:30:02. Forecast: 21/12/25 to 27/12/25. Timezone: UTC+0.00