Clear Outside v1.0 - International Weather Forecasts For Astronomers

Thursday 18

Waning Crescent 6%

03:41

18:28

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 OK
11 OK
12 OK
13 OK
14 OK
15 Bad
16 Bad
17 Bad
18 Bad

Sun - Rise: 06:45, Set: 19:09, Transit: 12:56. Moon - Rise: 03:41, Set: 18:28. Civil Dark: 19:42 - 06:12. Nautical Dark: 20:22 - 05:32. Astro Dark: 21:04 - 04:50

Total Clouds (% Sky Obscured)

66
85
88
95
100
100
96
98
97
99
86
68
80
83
58
26
43
38
35
26
89
92
100
100

Low Clouds (% Sky Obscured)

65
72
69
83
66
81
65
78
68
80
78
68
80
83
58
26
43
32
35
26
35
39
48
60

Medium Clouds (% Sky Obscured)

0
33
0
0
0
59
46
16
3
3
31
16
17
30
4
0
4
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

66
85
88
94
93
100
92
84
85
83
81
58
55
52
23
26
7
38
35
26
79
68
100
83

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)

13
11
10
9
9
9
9
8
7
5
5
5
4
4
7
8
9
10
11
12
13
12
11
9

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

17
16
16
16
15
15
15
15
15
15
15
15
15
16
17
20
21
22
20
21
21
20
20
19

Dew Point (°C)

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

Relative Humidity (%)

82
88
92
93
95
96
96
98
96
98
96
98
96
93
85
75
66
54
43
37
37
40
45
54

Pressure (mb)

1019
1020
1021
1021
1021
1021
1021
1020
1020
1020
1019
1019
1019
1019
1019
1019
1018
1018
1017
1016
1016
1015
1015
1015

Ozone (du)

260
260
260
260
259
258
257
257
258
257
257
258
259
258
258
258
259
259
258
258
258
258
259
259

Friday 19

Waning Crescent 2%

04:59

18:39

19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad
01 Bad
02 Bad
03 OK
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

Sun - Rise: 06:46, Set: 19:07, Transit: 12:55. Moon - Rise: 04:59, Set: 18:39. Civil Dark: 19:40 - 06:13. Nautical Dark: 20:20 - 05:34. Astro Dark: 21:01 - 04:52

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
82
68
46
100
100
100
98
100
100
100
100
100
100
97
100
100
60
78

Low Clouds (% Sky Obscured)

43
61
54
45
40
33
35
36
46
57
72
55
47
45
43
47
51
45
23
14
44
62
59
78

Medium Clouds (% Sky Obscured)

28
3
2
0
0
2
46
29
46
75
100
87
57
32
83
69
97
74
52
51
91
57
41
0

High Clouds (% Sky Obscured)

48
100
100
76
99
54
79
65
35
99
100
100
96
100
100
100
100
100
100
83
85
83
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
8
1
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
1
5
8
6
4
6
5
8
21
16
3
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)

7
6
5
5
4
4
3
3
3
3
3
4
5
4
6
9
11
12
13
16
18
18
18
19

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

62
67
68
69
69
67
69
64
67
64
65
69
73
76
74
71
68
69
59
54
64
64
72
68

Pressure (mb)

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

Ozone (du)

260
261
261
262
263
264
264
264
263
263
265
264
264
264
263
262
262
262
264
265
267
270
272
277

Saturday 20

Waning Crescent 0%

06:14

18:49

19 OK
20 Bad
21 OK
22 OK
23 OK
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

Sun - Rise: 06:48, Set: 19:04, Transit: 12:55. Moon - Rise: 06:14, Set: 18:49. Civil Dark: 19:38 - 06:15. Nautical Dark: 20:17 - 05:35. Astro Dark: 20:59 - 04:54

Total Clouds (% Sky Obscured)

31
46
43
15
36
62
78
51
57
50
50
58
70
77
88
95
97
87
90
93
97
97
98
98

Low Clouds (% Sky Obscured)

31
46
43
15
34
60
75
51
57
50
50
58
70
61
67
53
84
63
71
81
92
86
79
73

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
14
3
0
2
1
6
9
19
24
26
27
26
25
24
25
44
64
67

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 (%)

8
0
0
0
2
0
0
0
1
1
2
3
8
1
6
8
8
7
7
6
5
4
5
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)

17
14
12
12
12
11
11
10
10
9
8
7
6
5
7
8
10
10
10
10
11
12
12
12

Chance of Frost

Temperature (°C)

16
14
13
12
12
12
12
12
11
11
11
11
11
11
12
13
13
13
14
14
14
14
14
13

Feels Like (°C)

14
12
12
10
10
9
9
9
10
10
11
11
11
12
12
11
10
11
11
10
10
10
9
9

Dew Point (°C)

13
11
11
10
10
9
9
10
10
10
10
10
10
10
9
8
7
6
5
4
5
5
4
3

Relative Humidity (%)

81
82
84
87
87
84
80
87
92
90
96
96
96
93
83
75
65
59
54
52
53
53
51
51

Pressure (mb)

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

Ozone (du)

280
282
283
284
286
288
290
292
293
292
293
294
295
296
298
300
301
301
301
302
303
304
304
306

Sunday 21

New Moon 1%

07:27

18:59

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
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 OK
18 OK

Sun - Rise: 06:50, Set: 19:02, Transit: 12:55. Moon - Rise: 07:27, Set: 18:59. Civil Dark: 19:35 - 06:16. Nautical Dark: 20:15 - 05:37. Astro Dark: 20:56 - 04:56

Total Clouds (% Sky Obscured)

97
96
95
89
79
84
80
76
67
61
59
59
61
61
63
60
61
62
61
56
56
47
34
17

Low Clouds (% Sky Obscured)

64
59
55
38
23
11
26
42
54
50
47
43
40
38
39
27
14
1
9
17
28
30
26
17

Medium Clouds (% Sky Obscured)

67
69
68
69
67
61
43
23
14
14
15
14
16
19
20
26
33
34
31
25
22
15
9
0

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
1
0
0
2
0
0
0
0
0
0
0
0
1
1

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 (%)

8
11
13
13
13
10
9
6
0
1
1
0
1
1
0
3
3
1
8
5
2
2
2
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
11
10
10
10
12
11
11
11
11
11
11
11
12
13
13
14
14
13
14
13
11
11

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

7
7
6
6
6
7
6
6
5
5
5
5
5
6
7
8
9
10
11
11
12
11
11
10

Dew Point (°C)

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

Relative Humidity (%)

50
51
55
61
73
73
68
69
69
73
71
71
70
68
63
55
49
45
43
42
45
49
48
52

Pressure (mb)

1017
1018
1018
1019
1019
1020
1020
1020
1020
1021
1021
1021
1022
1022
1023
1023
1024
1024
1024
1023
1023
1024
1024
1024

Ozone (du)

308
311
312
313
313
313
314
313
312
312
312
315
315
315
315
314
314
313
311
310
310
309
307
307

Monday 22

Waxing Crescent 3%

08:40

18:59

19 Good
20 OK
21 OK
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 Bad
15 Bad
16 Bad
17 Bad
18 Bad

Sun - Rise: 06:51, Set: 18:58, Transit: 12:54. Moon - Rise: 08:40, Set: 18:59. Civil Dark: 19:33 - 06:18. Nautical Dark: 20:12 - 05:39. Astro Dark: 20:53 - 04:58

Total Clouds (% Sky Obscured)

17
21
26
28
28
27
28
28
29
35
40
46
71
69
74
79
89
96
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

17
21
26
28
28
26
27
28
29
35
40
46
40
38
36
47
57
68
73
75
80
75
73
74

Medium Clouds (% Sky Obscured)

0
0
0
0
1
2
2
2
2
2
1
1
54
30
20
17
14
15
14
13
17
16
14
17

High Clouds (% Sky Obscured)

0
0
0
0
0
0
1
1
1
2
2
1
27
14
2
26
54
85
85
85
85
90
90
80

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
2
4
4
18
21
19
35
45
52
49
46
45

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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

9
9
9
8
8
7
6
6
5
5
5
5
5
6
6
6
7
6
6
12
11
10
10
11

Dew Point (°C)

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

Relative Humidity (%)

60
65
66
65
67
69
69
69
67
70
71
74
74
68
62
57
55
51
48
48
48
48
50
53

Pressure (mb)

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

Ozone (du)

307
307
307
306
305
304
303
302
301
300
300
300
300
300
300
301
302
302
303
303
303
302
302
303

Tuesday 23

Waxing Crescent 7%

09:53

19:10

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

Sun - Rise: 06:53, Set: 18:55, Transit: 12:54. Moon - Rise: 09:53, Set: 19:10. Civil Dark: 19:31 - 06:20. Nautical Dark: 20:10 - 05:41. Astro Dark: 20:51 - 05:00

Total Clouds (% Sky Obscured)

99
97
96
96
100
97
96
98
100
99
97
95
97
98
100
100
100
100
99
97
98
97
85
77

Low Clouds (% Sky Obscured)

71
67
63
60
59
59
62
76
80
88
91
93
88
82
73
69
66
62
63
64
65
64
63
62

Medium Clouds (% Sky Obscured)

14
10
10
5
5
5
5
11
41
58
56
23
13
8
7
8
5
5
10
20
25
19
9
8

High Clouds (% Sky Obscured)

75
80
85
87
92
97
96
98
100
67
34
4
33
54
73
57
40
23
41
58
74
73
76
57

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

Precipitation Probability (%)

43
40
36
50
59
66
72
76
80
71
64
58
51
40
14
15
18
20
22
22
22
23
23
7

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

11
8
8
9
9
9
8
6
6
6
6
6
5
7
7
7
7
6
6
12
11
11
11
11

Dew Point (°C)

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

Relative Humidity (%)

55
62
68
76
77
81
84
84
85
85
81
77
73
72
72
71
60
50
43
44
46
47
50
51

Pressure (mb)

1024
1024
1024
1024
1024
1024
1024
1024
1023
1023
1023
1023
1023
1023
1024
1024
1024
1023
1023
1023
1023
1023
1023
1023

Ozone (du)

303
304
305
307
307
308
309
310
311
311
312
312
313
312
312
312
312
312
311
311
310
310
310
310

Wednesday 24

Waxing Crescent 13%

11:06

19:22

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
12 Bad

Sun - Rise: 06:55, Set: 18:53, Transit: 12:54. Moon - Rise: 11:06, Set: 19:22. Civil Dark: 19:28 - 06:21. Nautical Dark: 20:08 - 05:42. Astro Dark: 20:48 - 05:02

Total Clouds (% Sky Obscured)

73
69
71
71
77
85
90
91
100
100
100
100
100
100
100
95
90
87

Low Clouds (% Sky Obscured)

62
59
52
60
72
80
85
87
90
90
90
92
93
94
96
85
74
69

Medium Clouds (% Sky Obscured)

8
8
4
4
9
10
25
30
30
30
30
35
31
27
23
27
31
40

High Clouds (% Sky Obscured)

53
59
66
66
62
63
80
91
97
97
97
97
97
94
95
89
83
72

ISS Passover

Visibility (miles)

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

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

12
15
4
14
13
7
21
26
28
38
43
48
44
38
29
30
28
5

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

12
8
9
9
9
8
8
9
9
9
9
9
8
9
9
9
9
10

Dew Point (°C)

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

Relative Humidity (%)

54
58
65
71
69
67
65
67
68
71
72
73
75
75
72
72
62
55

Pressure (mb)

1023
1024
1024
1025
1025
1025
1025
1025
1025
1025
1025
1024
1024
1025
1025
1025
1025
1025

Ozone (du)

311
311
311
310
310
309
309
308
308
307
307
306
306
305
304
303
303
303

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

Generated: 18/09/25 19:20:16. Forecast: 18/09/25 to 24/09/25. Timezone: UTC+1.00