Clear Outside v1.0 - International Weather Forecasts For Astronomers

Friday 19

Waning Crescent 1%

08:14

14:38

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

Sun - Rise: 08:06, Set: 15:49, Transit: 11:57. Moon - Rise: 08:14, Set: 14:38. Civil Dark: 16:30 - 07:25. Nautical Dark: 17:14 - 06:41. Astro Dark: 17:55 - 05:59

Total Clouds (% Sky Obscured)

92
94
95
100
100
100
100
100
86
8
26
30
26
36
12
19
11
24
15
15
6
6
18
20

Low Clouds (% Sky Obscured)

48
4
0
0
0
0
0
0
0
5
26
30
26
36
11
19
11
24
15
15
6
6
18
20

Medium Clouds (% Sky Obscured)

92
94
95
100
51
90
29
7
5
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

92
76
95
100
100
30
25
95
50
8
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 (%)

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)

14
12
10
10
11
12
13
13
13
14
15
16
15
15
13
11
11
10
10
9
8
8
7
8

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

84
81
78
76
79
82
82
82
82
82
81
81
80
81
84
85
87
87
90
90
91
91
91
93

Pressure (mb)

1006
1007
1008
1009
1010
1011
1012
1013
1014
1014
1015
1015
1015
1015
1016
1016
1017
1017
1017
1018
1018
1017
1017
1017

Ozone (du)

340
339
339
348
353
349
355
360
356
360
363
365
363
358
345
317
310
301
295
293
288
284
283
288

Saturday 20

New Moon 0%

09:08

15:33

01 OK
02 OK
03 OK
04 OK
05 Bad
06 Bad
07 Bad
08 Bad
09 OK
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

Sun - Rise: 08:06, Set: 15:49, Transit: 11:58. Moon - Rise: 09:08, Set: 15:33. Civil Dark: 16:30 - 07:25. Nautical Dark: 17:14 - 06:41. Astro Dark: 17:56 - 06:00

Total Clouds (% Sky Obscured)

25
32
36
37
42
50
50
52
43
84
90
90
86
88
82
95
95
97
89
94
95
95
91
98

Low Clouds (% Sky Obscured)

25
32
36
37
42
50
50
52
43
37
37
89
55
53
52
59
63
78
85
85
90
91
83
95

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
63
70
65
65
60
50
51
46
86
74
55
62
47
48
65

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
1
2
1
14
25
25
25
25
25
30
25
14

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
2
2
1
1
1
2
6
7
1
0
1
3
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

91
93
93
93
93
93
93
93
94
90
87
84
79
79
84
88
91
90
88
87
85
86
90
91

Pressure (mb)

1016
1016
1016
1015
1014
1014
1014
1014
1014
1013
1012
1011
1011
1010
1010
1009
1009
1009
1008
1008
1008
1007
1007
1007

Ozone (du)

292
295
302
298
299
296
293
294
293
295
296
295
296
297
298
302
308
309
309
312
307
303
300
297

Sunday 21

Waxing Crescent 2%

09:48

16:40

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
22 Bad
23 Bad
00 Bad

Sun - Rise: 08:07, Set: 15:49, Transit: 11:58. Moon - Rise: 09:48, Set: 16:40. Civil Dark: 16:31 - 07:26. Nautical Dark: 17:15 - 06:42. Astro Dark: 17:56 - 06:00

Total Clouds (% Sky Obscured)

100
97
99
100
100
100
99
97
97
94
98
99
100
97
97
97
97
98
99
100
100
100
100
100

Low Clouds (% Sky Obscured)

99
85
87
83
78
78
83
72
79
67
84
84
87
79
80
74
75
61
65
62
75
68
56
40

Medium Clouds (% Sky Obscured)

71
93
96
82
82
87
94
88
62
87
87
96
100
96
95
91
93
95
78
75
100
99
99
99

High Clouds (% Sky Obscured)

48
55
76
100
100
98
54
62
68
65
82
80
60
62
53
68
64
76
87
100
100
100
100
99

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
8
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 (%)

3
6
19
26
15
19
6
3
6
18
26
43
32
32
14
5
11
10
8
10
10
8
1
3

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

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

Pressure (mb)

1006
1006
1006
1006
1006
1005
1005
1006
1006
1006
1006
1005
1005
1005
1005
1005
1006
1006
1006
1006
1007
1007
1007
1007

Ozone (du)

298
305
315
325
334
335
336
341
350
353
356
367
376
384
387
390
391
391
392
391
392
390
390
392

Monday 22

Waxing Crescent 6%

10:17

17:55

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
22 Bad
23 Bad
00 Bad

Sun - Rise: 08:07, Set: 15:50, Transit: 11:59. Moon - Rise: 10:17, Set: 17:55. Civil Dark: 16:31 - 07:26. Nautical Dark: 17:15 - 06:42. Astro Dark: 17:57 - 06:01

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
99
99
99
100
100
100
100
100
98
97
96
96

Low Clouds (% Sky Obscured)

32
33
40
45
41
52
57
64
67
77
88
90
92
94
92
83
76
71
71
66
69
72
70
76

Medium Clouds (% Sky Obscured)

100
100
87
74
61
76
88
100
100
100
100
89
76
61
55
12
7
3
23
50
60
60
55
45

High Clouds (% Sky Obscured)

98
97
98
99
100
100
100
100
79
58
38
38
46
46
64
83
100
73
47
15
15
15
15
25

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 (%)

4
1
2
2
1
4
3
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

88
88
88
88
86
88
85
85
83
82
81
78
79
82
82
85
85
88
88
90
89
93
93
93

Pressure (mb)

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

Ozone (du)

395
396
397
396
394
391
391
391
391
392
394
398
399
399
400
399
399
401
403
402
404
404
402
404

Tuesday 23

Waxing Crescent 12%

10:38

19:14

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
22 Bad
23 Bad
00 Bad

Sun - Rise: 08:08, Set: 15:51, Transit: 11:59. Moon - Rise: 10:38, Set: 19:14. Civil Dark: 16:32 - 07:27. Nautical Dark: 17:16 - 06:43. Astro Dark: 17:57 - 06:01

Total Clouds (% Sky Obscured)

97
98
98
98
97
98
99
100
99
98
97
96
96
97
98
98
99
99
100
100
99
97
96
96

Low Clouds (% Sky Obscured)

82
93
97
92
91
93
95
99
99
98
97
96
94
93
95
96
98
98
99
100
99
97
96
96

Medium Clouds (% Sky Obscured)

35
40
45
50
45
46
47
48
56
48
4
2
1
0
1
0
0
1
1
2
2
2
2
3

High Clouds (% Sky Obscured)

25
30
20
15
15
15
20
30
23
10
19
15
14
10
6
3
5
10
12
14
19
24
28
30

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
3
5
6
8
13
10
17
15
9
15
18
20
19
20
23
21
17
14
17

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

3
3
2
2
2
3
2
2
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3

Dew Point (°C)

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

Relative Humidity (%)

93
94
94
94
94
94
93
94
91
91
93
93
93
94
94
96
96
98
94
93
91
90
88
86

Pressure (mb)

1014
1014
1014
1014
1014
1014
1014
1015
1015
1016
1016
1015
1016
1016
1016
1016
1017
1017
1018
1018
1018
1019
1019
1020

Ozone (du)

404
404
402
405
405
405
407
408
408
401
396
395
396
397
398
397
397
397
395
394
392
391
389
388

Wednesday 24

Waxing Crescent 19%

10:53

20:33

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
22 OK
23 Good
00 OK

Sun - Rise: 08:08, Set: 15:51, Transit: 12:00. Moon - Rise: 10:53, Set: 20:33. Civil Dark: 16:32 - 07:27. Nautical Dark: 17:16 - 06:43. Astro Dark: 17:58 - 06:02

Total Clouds (% Sky Obscured)

96
95
97
99
100
100
100
100
97
95
92
88
84
92
95
96
95
81
71
63
44
25
5
14

Low Clouds (% Sky Obscured)

96
95
97
99
100
99
99
99
97
95
92
86
80
75
76
78
79
74
68
63
44
24
5
14

Medium Clouds (% Sky Obscured)

3
3
6
8
12
10
8
0
2
5
7
4
2
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

28
25
15
9
3
2
3
4
3
2
1
1
1
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 (%)

16
13
13
13
11
10
8
1
8
10
11
11
11
10
9
7
0
1
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
12
12
13
13
14
14
14
14
14
15
15
15
15
15
15
14
14
14
13
12
12

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

88
89
91
89
86
85
86
86
88
86
85
83
80
79
76
73
73
71
76
80
86
86
86
86

Pressure (mb)

1020
1021
1021
1022
1022
1023
1023
1024
1025
1025
1026
1026
1026
1027
1027
1027
1028
1028
1029
1029
1030
1030
1030
1030

Ozone (du)

388
387
387
388
388
389
386
382
379
378
376
375
370
366
361
361
361
360
359
357
356
354
353
352

Thursday 25

Waxing Crescent 28%

11:06

21:52

Sun - Rise: 08:08, Set: 15:52, Transit: 12:00. Moon - Rise: 11:06, Set: 21:52. Civil Dark: 16:33 - 07:27. Nautical Dark: 17:17 - 06:43. Astro Dark: 17:58 - 06:02

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 Bourn, Cambridgeshire, United Kingdom (52.20,-0.05)

Generated: 19/12/25 01:22:19. Forecast: 19/12/25 to 25/12/25. Timezone: UTC+0.00