Clear Outside v1.0 - International Weather Forecasts For Astronomers

Tuesday 9

Waning Gibbous 77%

21:14

11:47

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 OK
22 Bad
23 Bad

Sun - Rise: 07:57, Set: 15:47, Transit: 11:52. Moon - Rise: 21:14, Set: 11:47. Civil Dark: 16:28 - 07:17. Nautical Dark: 17:12 - 06:33. Astro Dark: 17:53 - 05:52

Total Clouds (% Sky Obscured)

82
86
89
100
100
100
100
100
100
100
100
100
100
99
100
85
77
56
55
44
52
39
94
100

Low Clouds (% Sky Obscured)

77
86
69
83
77
80
70
82
79
93
84
91
79
74
81
74
65
56
49
44
47
19
21
21

Medium Clouds (% Sky Obscured)

82
86
89
100
100
100
100
100
95
93
93
27
38
70
58
22
56
16
44
2
32
16
51
6

High Clouds (% Sky Obscured)

82
86
89
100
100
100
94
100
91
97
100
100
100
95
100
44
9
5
20
31
6
9
94
96

ISS Passover

Visibility (miles)

9
9
9
8
6
6
2
6
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
Light Rain
Light Rain
Very Light Rain
Light Rain
Light Rain
Light Rain
Very Light Rain
Very Light Rain
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

32
79
95
74
95
95
95
73
68
52
8
20
14
6
5
4
5
5
18
4
0
0
0
0

Precipitation Amount (mm)

0
0.5
1
0.3
0.6
1
1.1
0.3
0.3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

8
8
11
16
18
19
21
22
22
22
21
21
23
22
23
22
23
24
25
22
20
18
17
17

Chance of Frost

Temperature (°C)

12
12
13
12
12
12
12
12
12
12
13
13
13
13
13
13
13
13
13
13
12
11
10
10

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

93
90
86
87
83
84
87
87
83
80
81
79
75
76
77
84
82
83
83
77
76
83
81
76

Pressure (mb)

1008
1007
1007
1006
1006
1005
1004
1003
1003
1003
1002
1001
1001
1000
1000
999
999
999
1000
1002
1003
1004
1005
1006

Ozone (du)

311
308
305
301
297
292
286
289
291
291
290
288
285
284
283
282
280
281
281
281
281
281
282
281

Wednesday 10

Waning Gibbous 67%

22:35

12:01

00 Bad
01 Bad
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 OK
15 OK
16 OK
17 OK
18 OK
19 OK
20 OK
21 Bad
22 Bad
23 Bad

Sun - Rise: 07:58, Set: 15:47, Transit: 11:53. Moon - Rise: 22:35, Set: 12:01. Civil Dark: 16:28 - 07:18. Nautical Dark: 17:12 - 06:34. Astro Dark: 17:53 - 05:53

Total Clouds (% Sky Obscured)

98
92
27
50
54
64
64
64
61
69
68
68
61
57
33
34
38
25
20
21
22
95
91
95

Low Clouds (% Sky Obscured)

27
23
27
45
49
60
60
60
59
64
62
65
57
52
33
34
38
25
20
21
22
31
23
31

Medium Clouds (% Sky Obscured)

2
3
1
0
1
0
0
40
13
1
1
2
0
0
0
0
0
0
0
0
0
70
58
72

High Clouds (% Sky Obscured)

79
35
13
45
54
55
55
45
45
40
40
40
40
30
0
0
0
0
0
0
6
14
56
67

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
14
14
13
14
14
14
13
13
14
14
15
16
16
16
14
12
12
12
11
11
10
10
10

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

80
85
87
87
88
90
90
90
90
88
85
83
81
80
81
78
82
87
90
91
93
91
91
91

Pressure (mb)

1007
1008
1008
1009
1009
1010
1010
1010
1011
1012
1013
1013
1013
1014
1014
1015
1016
1017
1017
1018
1019
1020
1020
1020

Ozone (du)

279
279
280
280
283
286
291
292
295
297
300
302
304
309
315
317
316
315
315
311
309
308
308
304

Thursday 11

Third Quarter 57%

23:51

12:12

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

Sun - Rise: 07:59, Set: 15:47, Transit: 11:53. Moon - Rise: 23:51, Set: 12:12. Civil Dark: 16:28 - 07:19. Nautical Dark: 17:12 - 06:35. Astro Dark: 17:53 - 05:54

Total Clouds (% Sky Obscured)

36
54
85
24
24
56
40
41
39
37
38
57
91
89
91
97
99
92
93
95
98
99
99
100

Low Clouds (% Sky Obscured)

31
16
23
24
24
49
40
41
39
37
38
57
72
75
82
86
83
73
69
75
72
64
76
67

Medium Clouds (% Sky Obscured)

5
36
65
0
0
0
0
0
0
0
0
0
0
0
0
4
70
70
75
66
73
82
91
100

High Clouds (% Sky Obscured)

6
5
46
2
3
31
2
2
2
2
0
14
50
50
50
48
68
55
60
61
41
37
51
65

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
1
0
0
0
0
3
5
10
33

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

91
93
91
90
91
91
91
91
93
93
91
88
88
88
90
91
93
93
91
93
93
95
95
95

Pressure (mb)

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

Ozone (du)

303
304
302
301
301
300
300
299
299
300
301
300
300
300
301
304
303
306
309
311
310
308
305
305

Friday 12

Waning Crescent 46%

No Rise

12:22

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
22 Bad
23 Bad

Sun - Rise: 08:00, Set: 15:47, Transit: 11:54. Moon - Rise: No Rise, Set: 12:22. Civil Dark: 16:28 - 07:20. Nautical Dark: 17:12 - 06:36. Astro Dark: 17:53 - 05:54

Total Clouds (% Sky Obscured)

98
96
95
97
98
100
100
99
97
99
99
100
100
100
100
100
100
100
100
96
98
94
88
83

Low Clouds (% Sky Obscured)

69
64
66
66
64
63
72
80
84
77
60
46
62
77
93
76
58
48
29
28
17
30
28
30

Medium Clouds (% Sky Obscured)

96
77
47
51
55
58
95
95
92
97
93
99
99
100
96
63
59
96
95
78
77
88
88
83

High Clouds (% Sky Obscured)

81
58
34
53
76
100
72
47
16
19
24
25
40
58
68
79
90
100
100
81
92
73
46
19

ISS Passover

Visibility (miles)

8
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
Very Light Rain
Light Rain
Very Light Rain
None
None
None
None
None
None
None

Precipitation Probability (%)

23
2
3
13
12
7
14
19
7
17
13
5
20
33
57
68
65
47
23
7
0
2
14
18

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.2
0.4
0.3
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

11
11
12
11
11
11
11
11
10
11
12
12
12
12
11
10
7
7
7
7
6
6
6
6

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

96
95
91
90
90
91
87
83
85
90
88
85
83
83
81
81
84
84
87
87
85
85
84
85

Pressure (mb)

1013
1012
1012
1012
1012
1011
1011
1012
1012
1012
1012
1012
1012
1012
1013
1013
1014
1015
1015
1016
1017
1017
1018
1018

Ozone (du)

304
304
307
307
307
307
307
307
308
308
309
312
313
314
313
314
314
316
318
320
324
327
328
329

Saturday 13

Waning Crescent 36%

01:05

12:31

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

Sun - Rise: 08:01, Set: 15:47, Transit: 11:54. Moon - Rise: 01:05, Set: 12:31. Civil Dark: 16:28 - 07:20. Nautical Dark: 17:12 - 06:37. Astro Dark: 17:53 - 05:55

Total Clouds (% Sky Obscured)

65
44
30
37
39
41
33
29
25
25
20
20
29
48
63
56
54
47
53
57
54
53
54
55

Low Clouds (% Sky Obscured)

25
21
11
10
17
18
10
7
5
3
0
0
15
30
45
53
54
47
53
51
41
44
42
44

Medium Clouds (% Sky Obscured)

65
44
30
37
39
41
33
29
25
25
20
20
29
38
36
33
35
47
37
23
13
14
18
24

High Clouds (% Sky Obscured)

28
26
30
20
15
15
15
20
25
25
20
0
0
0
0
0
0
0
6
16
34
50
54
55

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
5
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 (%)

19
9
8
5
3
1
0
0
0
12
9
1
9
13
17
18
12
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
6
6
6
6
7
7
7
8
9
10
11
11
11
12
12
12
12
12
11
12
12
12

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

4
4
4
4
4
3
3
3
2
2
3
4
5
5
6
6
7
7
7
6
6
6
6
6

Dew Point (°C)

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

Relative Humidity (%)

85
88
90
88
88
86
85
82
82
82
85
84
84
84
85
85
87
91
93
93
93
93
91
91

Pressure (mb)

1018
1018
1018
1019
1019
1019
1019
1019
1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
1021
1021
1021
1021
1021
1021

Ozone (du)

328
328
328
330
329
332
338
351
358
367
379
385
396
394
392
390
381
373
364
358
353
347
343
339

Sunday 14

Waning Crescent 27%

02:17

12:42

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
22 Bad
23 Bad

Sun - Rise: 08:02, Set: 15:47, Transit: 11:55. Moon - Rise: 02:17, Set: 12:42. Civil Dark: 16:28 - 07:21. Nautical Dark: 17:12 - 06:37. Astro Dark: 17:53 - 05:56

Total Clouds (% Sky Obscured)

63
70
74
77
79
79
77
77
76
76
76
75
66
61
82
92
96
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

50
55
57
53
55
58
65
74
76
76
75
74
63
51
40
60
80
100
96
93
89
86
84
80

Medium Clouds (% Sky Obscured)

34
50
53
37
28
25
31
46
46
32
18
4
11
16
20
31
34
33
47
56
51
61
77
100

High Clouds (% Sky Obscured)

63
59
50
39
33
22
10
7
4
5
5
5
10
10
15
15
20
20
53
78
100
100
100
100

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
Very Light Rain

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
0
0
5
5
1
10
12
2
4
2
0
30
48
61

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
0.2

Wind Speed/Direction (mph)

12
13
13
12
13
13
14
14
14
14
15
16
17
16
16
15
15
15
16
17
17
18
18
18

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

90
90
90
90
91
93
96
95
95
93
91
90
87
87
87
85
84
84
84
81
81
81
80
81

Pressure (mb)

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

Ozone (du)

335
331
328
325
322
320
317
318
318
319
318
317
316
315
315
314
311
308
305
301
297
294
292
290

Monday 15

Waning Crescent 19%

03:30

12:54

Sun - Rise: 08:03, Set: 15:47, Transit: 11:55. Moon - Rise: 03:30, Set: 12:54. Civil Dark: 16:28 - 07:22. Nautical Dark: 17:12 - 06:38. Astro Dark: 17:54 - 05:57

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: 09/12/25 00:22:00. Forecast: 09/12/25 to 15/12/25. Timezone: UTC+0.00