Clear Outside v1.0 - International Weather Forecasts For Astronomers

Thursday 18

Waning Crescent 12%

03:36

18:14

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 Bad
07 Bad
08 Bad
09 Bad

Sun - Rise: 06:42, Set: 19:07, Transit: 12:54. Moon - Rise: 03:36, Set: 18:14. Civil Dark: 19:41 - 06:08. Nautical Dark: 20:21 - 05:28. Astro Dark: 21:04 - 04:46

Total Clouds (% Sky Obscured)

83
88
87
93
95
100
92
44
91
95
93
98
94
86
99
95
93
88
68
71
65
60
84
79

Low Clouds (% Sky Obscured)

83
85
87
89
63
53
51
44
52
51
53
39
40
43
48
58
76
50
55
61
65
60
84
79

Medium Clouds (% Sky Obscured)

18
18
27
20
20
20
0
0
0
20
20
28
26
8
28
70
34
30
30
44
15
54
32
32

High Clouds (% Sky Obscured)

2
6
23
50
58
73
63
33
82
89
38
85
40
69
88
76
44
39
8
32
24
55
6
7

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
3
1
20
13
13
2
2
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
16
16
17
17
18
16
15
16
14
12
11
11
11
11
11
11
11
10
9
9
9
9
11

Chance of Frost

Temperature (°C)

19
21
21
22
22
23
23
22
21
20
19
18
18
17
17
16
16
16
16
16
15
15
16
18

Feels Like (°C)

17
18
18
19
20
20
21
21
19
18
17
16
16
15
15
15
15
14
15
16
14
15
15
16

Dew Point (°C)

17
17
17
17
16
16
16
15
15
15
15
15
15
15
15
15
15
14
15
15
14
15
14
14

Relative Humidity (%)

86
80
76
72
70
65
65
63
67
74
77
81
86
87
90
89
90
90
92
93
93
95
87
77

Pressure (mb)

1017
1017
1017
1017
1017
1018
1018
1017
1018
1018
1019
1019
1019
1020
1020
1020
1020
1019
1019
1019
1019
1019
1019
1019

Ozone (du)

263
262
262
261
261
261
261
261
260
259
259
257
257
255
253
254
256
257
258
258
259
259
260
258

Friday 19

Waning Crescent 6%

04:55

18:27

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

Sun - Rise: 06:44, Set: 19:04, Transit: 12:53. Moon - Rise: 04:55, Set: 18:27. Civil Dark: 19:38 - 06:10. Nautical Dark: 20:19 - 05:30. Astro Dark: 21:01 - 04:48

Total Clouds (% Sky Obscured)

55
42
46
33
13
23
48
90
98
90
94
98
86
86
96
65
32
42
100
100
100
100
96
100

Low Clouds (% Sky Obscured)

55
42
43
33
8
23
30
28
30
0
9
29
28
37
36
10
0
0
11
24
34
39
47
47

Medium Clouds (% Sky Obscured)

17
2
3
0
0
0
0
0
32
12
31
48
0
0
1
2
2
2
28
90
47
100
89
71

High Clouds (% Sky Obscured)

55
42
46
12
13
9
27
56
87
79
90
98
69
62
83
38
32
42
100
100
100
100
85
100

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
6
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
14
7
14
27
3
1
0
4
6

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
12
13
13
14
12
10
8
7
7
7
7
7
7
6
5
5
5
5
5
4
5

Chance of Frost

Temperature (°C)

19
21
22
23
24
25
25
24
23
21
20
18
17
16
16
15
14
14
14
14
14
14
15
16

Feels Like (°C)

17
19
20
21
22
22
22
22
21
19
18
17
16
16
16
14
15
13
13
13
13
14
15
16

Dew Point (°C)

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

Relative Humidity (%)

69
63
56
50
43
39
37
39
43
54
58
61
64
65
67
67
75
75
80
83
83
83
79
72

Pressure (mb)

1019
1018
1018
1017
1016
1015
1015
1014
1015
1015
1015
1015
1015
1015
1014
1014
1013
1013
1013
1012
1012
1012
1011
1011

Ozone (du)

257
256
257
258
258
260
262
263
264
263
264
263
263
262
263
264
265
265
264
263
263
264
264
264

Saturday 20

Waning Crescent 2%

06:11

18:37

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

Sun - Rise: 06:45, Set: 19:02, Transit: 12:53. Moon - Rise: 06:11, Set: 18:37. Civil Dark: 19:36 - 06:12. Nautical Dark: 20:16 - 05:31. Astro Dark: 20:58 - 04:50

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
85
98
100
84
84
31
33
16
33
53
63
59
75
76
74
68
72
74

Low Clouds (% Sky Obscured)

60
46
41
44
50
44
31
47
45
60
72
31
33
16
33
45
50
49
65
72
63
64
65
66

Medium Clouds (% Sky Obscured)

74
75
79
68
67
22
59
51
44
41
51
3
0
0
0
0
0
1
0
0
0
5
17
26

High Clouds (% Sky Obscured)

100
100
100
100
100
97
70
95
100
50
2
0
0
3
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
8
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
5
7
2
2
3
2
4
0
0
3
31
3
0
0
0
0
0
0
0
0
3
4
9

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
9
11
12
12
13
14
14
15
14
14
15
17
17
19
19
20
19
17
18
18
18
16
16

Chance of Frost

Temperature (°C)

17
18
19
20
20
21
21
21
20
19
18
18
16
15
13
13
13
12
12
13
13
13
13
13

Feels Like (°C)

17
16
17
17
17
17
18
19
18
17
16
16
15
12
10
8
6
6
7
6
6
7
7
7

Dew Point (°C)

10
8
8
8
8
10
11
12
13
14
14
15
11
9
8
8
6
6
6
6
7
6
7
7

Relative Humidity (%)

63
52
47
45
45
50
50
56
64
72
77
85
68
70
71
70
64
63
67
65
65
62
65
68

Pressure (mb)

1011
1010
1010
1009
1008
1007
1006
1006
1005
1005
1005
1005
1005
1005
1005
1005
1006
1006
1005
1005
1006
1006
1007
1008

Ozone (du)

262
261
260
261
262
265
264
265
264
265
265
268
273
274
275
276
278
278
279
281
283
284
287
289

Sunday 21

New Moon 0%

07:25

18:47

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

Sun - Rise: 06:47, Set: 19:00, Transit: 12:53. Moon - Rise: 07:25, Set: 18:47. Civil Dark: 19:33 - 06:13. Nautical Dark: 20:14 - 05:33. Astro Dark: 20:55 - 04:52

Total Clouds (% Sky Obscured)

69
75
85
96
80
100
99
98
60
52
42
33
30
31
35
56
75
72
74
75
78
72
50
58

Low Clouds (% Sky Obscured)

63
69
80
90
76
84
82
71
53
37
19
0
8
17
27
36
44
53
56
61
66
65
33
28

Medium Clouds (% Sky Obscured)

26
26
26
37
50
60
58
57
55
46
41
33
30
29
27
20
13
18
6
8
8
5
3
0

High Clouds (% Sky Obscured)

0
0
0
0
3
20
0
15
0
0
0
0
0
0
0
0
0
0
0
0
0
0
10
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 (%)

4
3
2
5
8
8
22
12
14
11
10
2
3
3
5
8
19
17
14
20
17
19
19
20

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)

17
18
18
16
16
17
15
13
12
10
9
9
9
9
9
9
9
9
9
9
9
8
9
10

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

55
50
47
51
50
47
49
54
54
59
65
71
75
77
80
84
84
81
81
82
84
82
83
76

Pressure (mb)

1009
1010
1010
1010
1011
1011
1011
1011
1012
1012
1013
1014
1014
1015
1015
1015
1015
1016
1016
1016
1017
1018
1018
1019

Ozone (du)

291
293
295
295
296
296
298
297
301
303
304
305
306
307
308
310
312
314
314
314
315
315
315
315

Monday 22

Waxing Crescent 1%

08:38

18:56

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

Sun - Rise: 06:49, Set: 18:57, Transit: 12:52. Moon - Rise: 08:38, Set: 18:56. Civil Dark: 19:31 - 06:15. Nautical Dark: 20:11 - 05:35. Astro Dark: 20:53 - 04:53

Total Clouds (% Sky Obscured)

61
67
75
72
68
69
58
46
34
35
41
47
24
26
27
48
65
69
60
69
63
67
75
88

Low Clouds (% Sky Obscured)

34
56
73
66
58
47
31
23
11
18
26
33
24
26
27
34
40
47
49
51
54
45
37
28

Medium Clouds (% Sky Obscured)

0
0
0
8
20
28
16
7
0
0
0
0
0
0
0
18
37
50
34
53
63
67
62
58

High Clouds (% Sky Obscured)

15
15
11
7
1
0
0
0
0
0
0
0
1
3
3
31
59
69
60
69
63
55
27
3

ISS Passover

Visibility (miles)

9
7
7
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 (%)

28
29
18
9
7
5
2
3
1
0
0
0
0
0
0
1
1
0
2
2
1
6
6
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)

12
14
15
15
15
15
16
14
13
12
11
10
8
8
7
7
7
6
6
6
6
6
8
9

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

7
7
8
8
7
6
6
7
7
6
5
4
4
4
4
3
3
4
4
4
4
4
4
4

Relative Humidity (%)

68
64
64
66
59
56
56
64
66
67
66
65
66
70
71
70
73
74
77
78
78
79
73
68

Pressure (mb)

1019
1020
1020
1020
1020
1020
1020
1021
1021
1022
1022
1022
1022
1022
1022
1023
1023
1022
1022
1022
1022
1023
1023
1023

Ozone (du)

315
314
314
315
314
311
311
311
310
309
307
306
305
303
302
302
302
302
303
302
302
302
302
302

Tuesday 23

Waxing Crescent 3%

09:52

19:06

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 Bad
07 Bad
08 Bad
09 Bad

Sun - Rise: 06:50, Set: 18:55, Transit: 12:52. Moon - Rise: 09:52, Set: 19:06. Civil Dark: 19:29 - 06:17. Nautical Dark: 20:09 - 05:37. Astro Dark: 20:50 - 04:55

Total Clouds (% Sky Obscured)

99
99
100
98
97
99
97
95
96
97
96
96
95
95
95
90
80
30
20
20
25
45
60
75

Low Clouds (% Sky Obscured)

48
65
84
85
86
86
80
77
73
71
75
75
83
91
95
89
78
30
20
20
25
45
59
51

Medium Clouds (% Sky Obscured)

54
40
35
40
35
45
53
56
50
42
15
15
15
15
15
30
40
30
20
20
25
45
40
45

High Clouds (% Sky Obscured)

2
1
0
0
0
0
24
51
86
95
95
95
95
95
95
89
80
30
20
20
3
25
44
60

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

Precipitation Probability (%)

33
45
48
61
73
84
76
72
75
81
82
81
95
95
95
95
95
95
95
91
73
64
52
34

Precipitation Amount (mm)

0
0
0
0.2
0.4
0.6
0.4
0.3
0.2
0.3
0.4
0.4
0.6
0.9
1.1
1.1
1
1.1
0.9
0.6
0.3
0.2
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

4
4
4
4
4
3
3
4
4
4
5
5
5
6
6
6
7
7
7
7
8
8
7
6

Relative Humidity (%)

61
58
56
54
54
53
52
56
59
63
66
68
72
74
76
77
81
84
87
87
88
88
77
67

Pressure (mb)

1023
1023
1023
1022
1022
1022
1022
1022
1022
1022
1023
1023
1023
1023
1023
1023
1023
1023
1023
1023
1023
1023
1024
1024

Ozone (du)

303
303
303
303
303
302
302
302
301
301
301
301
300
301
301
301
301
301
300
300
300
300
299
299

Wednesday 24

Waxing Crescent 7%

No Rise

19:17

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 Bad

Sun - Rise: 06:52, Set: 18:53, Transit: 12:51. Moon - Rise: No Rise, Set: 19:17. Civil Dark: 19:26 - 06:18. Nautical Dark: 20:06 - 05:39. Astro Dark: 20:48 - 04:57

Total Clouds (% Sky Obscured)

90
90
90
90
90
91
91
91
92
87
86
86
86
72
62
58
58
67
67
66
71

Low Clouds (% Sky Obscured)

48
44
44
52
61
69
72
75
79
79
79
75
70
68
62
58
58
67
67
66
64

Medium Clouds (% Sky Obscured)

55
65
59
48
61
55
55
41
31
35
22
17
14
14
15
20
19
24
39
49
65

High Clouds (% Sky Obscured)

60
50
35
35
45
45
45
35
30
30
21
26
32
33
33
38
48
62
67
66
71

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

Fog (%)

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
Very Light Rain
Very Light Rain
Very Light Rain

Precipitation Probability (%)

34
29
21
23
23
23
24
24
20
19
20
19
28
29
27
34
42
52
57
60
61

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.2
0.3
0.3

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

12
13
13
14
14
13
13
13
13
12
11
11
10
10
10
10
10
10
10
10
10

Feels Like (°C)

8
8
8
8
13
12
12
13
13
15
10
10
11
10
11
10
10
10
11
11
11

Dew Point (°C)

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

Relative Humidity (%)

59
55
51
46
46
44
44
48
54
60
64
68
74
76
77
78
80
81
82
82
84

Pressure (mb)

1024
1024
1024
1024
1024
1024
1024
1024
1024
1025
1025
1025
1026
1026
1026
1026
1026
1026
1026
1026
1026

Ozone (du)

298
298
297
297
297
297
297
297
296
296
296
295
295
294
294
294
293
291
290
291
292

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

Generated: 18/09/25 10:23:38. Forecast: 18/09/25 to 24/09/25. Timezone: UTC+1.00