Clear Outside v1.0 - International Weather Forecasts For Astronomers

Tuesday 9

Waning Gibbous 77%

21:11

11:49

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 OK
00 Bad

Sun - Rise: 08:01, Set: 15:43, Transit: 11:52. Moon - Rise: 21:11, Set: 11:49. Civil Dark: 16:25 - 07:20. Nautical Dark: 17:09 - 06:35. Astro Dark: 17:51 - 05:53

Total Clouds (% Sky Obscured)

58
68
75
100
100
100
100
100
100
100
100
100
99
99
81
93
75
55
38
48
49
50
36
59

Low Clouds (% Sky Obscured)

58
68
75
86
82
85
81
81
74
79
59
71
64
84
65
84
74
53
38
42
49
50
36
45

Medium Clouds (% Sky Obscured)

58
68
75
100
100
100
100
100
96
80
97
54
85
22
64
56
28
6
3
48
3
0
0
0

High Clouds (% Sky Obscured)

58
68
75
100
100
100
86
100
100
100
100
100
97
96
72
64
4
3
3
1
27
6
6
54

ISS Passover

Visibility (miles)

7
5
5
6
3
7
4
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
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

20
84
95
95
95
95
95
95
93
49
36
26
5
2
13
21
35
28
6
0
0
0
0
0

Precipitation Amount (mm)

0
0.6
0.9
1.2
1.2
1
0.7
0.6
0.6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

10
10
11
16
19
21
22
24
23
22
22
23
23
24
24
24
25
25
24
22
20
18
17
15

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

96
96
93
92
89
87
90
86
84
83
81
83
79
79
83
83
84
83
79
79
72
77
78
77

Pressure (mb)

1007
1006
1005
1004
1003
1002
1001
1001
1001
1000
1000
999
998
997
997
997
997
998
999
1001
1002
1003
1004
1005

Ozone (du)

310
307
303
297
293
288
292
293
295
294
290
289
287
284
283
281
280
279
280
281
281
281
278
277

Wednesday 10

Waning Gibbous 67%

22:33

12:02

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

Sun - Rise: 08:02, Set: 15:43, Transit: 11:53. Moon - Rise: 22:33, Set: 12:02. Civil Dark: 16:25 - 07:21. Nautical Dark: 17:09 - 06:36. Astro Dark: 17:51 - 05:54

Total Clouds (% Sky Obscured)

55
61
64
61
64
63
63
62
73
74
61
49
55
25
29
31
86
9
28
100
99
100
97
96

Low Clouds (% Sky Obscured)

36
44
44
48
52
51
54
50
58
63
61
49
55
25
29
31
36
8
0
2
8
0
21
27

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
66
1
23
41
76
99
87
83

High Clouds (% Sky Obscured)

55
61
60
55
50
50
40
40
35
30
2
0
0
0
0
0
40
0
3
100
94
100
83
74

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)

14
14
14
13
13
14
13
14
15
16
17
18
18
16
14
13
13
10
11
12
12
11
11
11

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

6
7
7
7
7
6
7
7
7
7
7
7
7
7
7
6
6
6
6
6
6
6
6
6

Relative Humidity (%)

82
85
88
90
88
87
90
90
87
82
80
73
75
77
77
80
82
87
90
91
91
91
88
91

Pressure (mb)

1006
1006
1007
1007
1008
1008
1009
1010
1010
1011
1011
1011
1012
1012
1013
1014
1015
1016
1016
1017
1018
1018
1019
1018

Ozone (du)

277
279
281
286
289
292
295
298
301
306
308
311
315
323
320
316
316
315
313
312
311
308
306
305

Thursday 11

Third Quarter 57%

23:51

12:13

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

Sun - Rise: 08:03, Set: 15:43, Transit: 11:53. Moon - Rise: 23:51, Set: 12:13. Civil Dark: 16:25 - 07:22. Nautical Dark: 17:09 - 06:37. Astro Dark: 17:52 - 05:55

Total Clouds (% Sky Obscured)

87
80
81
35
30
37
50
55
54
59
65
63
73
89
89
87
83
88
93
98
99
99
100
100

Low Clouds (% Sky Obscured)

38
43
36
35
30
37
50
55
54
59
65
61
66
59
53
54
53
48
45
37
41
45
50
68

Medium Clouds (% Sky Obscured)

67
45
23
0
0
0
0
0
0
0
0
0
0
0
0
32
60
55
50
55
68
83
95
88

High Clouds (% Sky Obscured)

50
40
43
6
0
3
6
5
0
2
0
4
28
65
69
71
67
74
81
74
62
99
78
93

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
1
5
10

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

93
94
94
94
94
91
90
88
88
87
87
87
87
88
93
93
95
93
91
91
91
93
95
95

Pressure (mb)

1018
1019
1018
1018
1018
1018
1018
1018
1018
1018
1017
1017
1016
1016
1015
1015
1015
1015
1015
1014
1014
1014
1013
1013

Ozone (du)

304
302
302
302
303
301
302
301
301
299
300
303
300
299
301
304
305
305
305
307
309
307
304
304

Friday 12

Waning Crescent 46%

01:05

12:22

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: 08:04, Set: 15:43, Transit: 11:54. Moon - Rise: 01:05, Set: 12:22. Civil Dark: 16:25 - 07:22. Nautical Dark: 17:10 - 06:38. Astro Dark: 17:52 - 05:56

Total Clouds (% Sky Obscured)

100
100
100
100
100
99
99
98
99
99
100
100
100
100
100
100
100
100
100
90
98
98
97
85

Low Clouds (% Sky Obscured)

76
84
77
72
66
51
75
80
80
79
78
84
92
98
81
67
52
35
17
0
8
16
24
29

Medium Clouds (% Sky Obscured)

80
74
27
34
44
95
95
95
95
94
94
96
98
100
97
52
55
90
89
74
87
92
95
82

High Clouds (% Sky Obscured)

100
100
100
100
99
72
47
22
50
75
100
81
69
9
65
81
100
100
79
62
54
53
30
40

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

Precipitation Probability (%)

24
6
23
12
19
12
13
5
19
14
6
21
42
61
67
64
43
22
5
0
0
0
1
1

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

12
12
12
12
11
11
11
11
11
12
12
13
12
11
10
7
7
7
7
6
6
6
6
7

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

96
98
96
95
93
90
93
88
85
85
87
85
84
84
80
77
78
78
79
81
85
86
85
85

Pressure (mb)

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

Ozone (du)

304
302
302
302
301
302
302
301
302
304
305
306
306
308
311
312
315
318
322
325
326
327
328
329

Saturday 13

Waning Crescent 36%

01:05

12:30

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: 08:05, Set: 15:43, Transit: 11:54. Moon - Rise: 01:05, Set: 12:30. Civil Dark: 16:25 - 07:23. Nautical Dark: 17:10 - 06:39. Astro Dark: 17:52 - 05:56

Total Clouds (% Sky Obscured)

71
58
61
61
64
61
59
62
63
57
51
51
55
60
74
82
86
76
65
55
67
79
92
95

Low Clouds (% Sky Obscured)

35
46
43
36
36
38
40
42
38
34
30
36
43
50
58
66
75
63
51
39
44
47
49
52

Medium Clouds (% Sky Obscured)

71
58
61
61
64
60
50
50
45
40
40
37
34
30
27
27
25
22
14
12
14
15
17
30

High Clouds (% Sky Obscured)

45
45
40
45
37
40
30
25
30
25
20
10
3
0
0
0
0
0
2
7
30
55
80
87

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 (%)

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

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

3
3
3
3
3
2
2
2
2
3
3
5
5
5
6
6
7
8
6
5
5
5
5
4

Dew Point (°C)

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

Relative Humidity (%)

85
85
88
86
85
85
83
83
83
82
82
84
85
87
88
90
91
93
91
91
91
91
91
93

Pressure (mb)

1017
1017
1018
1018
1018
1018
1018
1018
1019
1019
1019
1019
1019
1018
1018
1018
1019
1019
1019
1019
1019
1019
1019
1019

Ozone (du)

330
330
332
334
338
346
357
360
361
370
383
397
396
395
394
385
376
366
361
355
349
343
337
331

Sunday 14

Waning Crescent 27%

02:18

12:40

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: 08:06, Set: 15:43, Transit: 11:55. Moon - Rise: 02:18, Set: 12:40. Civil Dark: 16:25 - 07:24. Nautical Dark: 17:10 - 06:39. Astro Dark: 17:52 - 05:57

Total Clouds (% Sky Obscured)

98
100
95
90
86
82
77
71
74
78
79
84
90
93
96
94
88
92
96
100
100
100
100
100

Low Clouds (% Sky Obscured)

52
55
64
68
75
76
74
71
74
73
73
76
80
84
82
82
82
83
85
86
89
90
94
90

Medium Clouds (% Sky Obscured)

43
52
47
51
59
53
38
21
14
7
0
16
32
48
52
52
49
51
38
36
51
75
98
98

High Clouds (% Sky Obscured)

93
100
72
43
15
15
15
15
15
20
20
20
20
25
25
25
30
53
83
100
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
Very Light Rain
Light Rain
Light Rain

Precipitation Probability (%)

0
0
0
0
0
4
8
1
7
7
1
1
0
0
6
10
3
14
19
9
44
64
74
81

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.3
0.4
0.4

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

90
90
88
90
91
93
93
94
95
93
91
90
87
85
85
85
85
87
84
81
81
82
84
87

Pressure (mb)

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

Ozone (du)

327
323
320
320
320
320
321
322
323
323
323
323
319
314
310
307
304
301
297
293
288
286
285
283

Monday 15

Waning Crescent 19%

03:32

12:51

Sun - Rise: 08:07, Set: 15:43, Transit: 11:55. Moon - Rise: 03:32, Set: 12:51. Civil Dark: 16:25 - 07:25. Nautical Dark: 17:10 - 06:40. Astro Dark: 17:52 - 05:58

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 Boston, Lincolnshire, United Kingdom (52.98,-0.02)

Generated: 09/12/25 01:35:25. Forecast: 09/12/25 to 15/12/25. Timezone: UTC+0.00