Clear Outside v1.0 - International Weather Forecasts For Astronomers

Monday 27

Waxing Gibbous 86%

15:46

04:19

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
01 Bad
02 Bad
03 Bad
04 Bad

Sun - Rise: 05:33, Set: 20:21, Transit: 12:57. Moon - Rise: 15:46, Set: 04:19. Civil Dark: 21:00 - 04:52. Nautical Dark: 21:51 - 04:00. Astro Dark: 22:55 - 02:55

Total Clouds (% Sky Obscured)

100
100
86
68
71
86
56
89
100
96
70
85
97
100
94
96
98
100
100
100
96
95
99
89

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
30
52
14
0
35
45
100
57
92
98
100
100
100
84
92
97
69

Medium Clouds (% Sky Obscured)

83
37
63
14
71
86
20
20
100
29
24
70
65
100
92
71
32
18
66
43
40
51
23
35

High Clouds (% Sky Obscured)

100
100
64
45
3
0
0
3
3
0
0
0
30
50
0
0
3
59
60
3
0
0
0
3

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
4
4
9
4
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
Light Rain
Very Light Rain
None
None
None
None
Light Rain
Light Rain
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

0
0
0
0
0
0
30
65
64
58
49
25
30
73
63
15
7
7
17
18
21
20
17
10

Precipitation Amount (mm)

0
0
0
0
0
0
0
0.5
0.3
0
0
0
0
0.5
0.5
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

6
5
6
6
5
5
5
4
10
8
11
13
14
14
12
11
10
11
11
8
8
14
13
13

Chance of Frost

Temperature (°C)

9
8
9
10
12
15
16
17
17
14
15
13
14
12
11
10
9
9
9
9
9
9
8
8

Feels Like (°C)

6
5
6
9
12
13
15
18
14
13
14
9
10
9
7
6
5
5
4
6
6
4
4
4

Dew Point (°C)

6
5
6
6
8
9
10
11
12
13
11
10
10
10
9
8
8
7
6
6
8
7
6
6

Relative Humidity (%)

81
84
82
76
72
69
67
65
75
90
74
80
76
83
85
90
93
88
85
84
91
88
87
85

Pressure (mb)

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

Ozone (du)

379
384
385
386
386
399
399
400
402
414
421
422
426
432
435
439
442
440
438
437
433
431
428
420

Tuesday 28

Waxing Gibbous 92%

17:02

04:28

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

Sun - Rise: 05:31, Set: 20:23, Transit: 12:57. Moon - Rise: 17:02, Set: 04:28. Civil Dark: 21:02 - 04:50. Nautical Dark: 21:54 - 03:58. Astro Dark: 22:59 - 02:51

Total Clouds (% Sky Obscured)

92
92
68
66
50
56
55
27
22
21
7
0
0
0
0
0
0
0
0
0
0
5
3
0

Low Clouds (% Sky Obscured)

75
68
68
66
50
56
51
27
22
21
7
0
0
0
0
0
0
0
0
0
0
5
3
0

Medium Clouds (% Sky Obscured)

28
28
17
19
7
19
22
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

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 (%)

2
1
0
1
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
14
14
15
17
18
18
18
18
18
18
18
18
17
16
15
14
13
14
14
14
14
14
14

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

84
84
81
80
73
67
64
65
62
61
64
67
66
72
77
78
78
81
81
78
78
81
81
82

Pressure (mb)

1027
1027
1027
1028
1028
1028
1028
1028
1028
1028
1028
1028
1028
1028
1028
1028
1028
1028
1029
1028
1028
1028
1028
1028

Ozone (du)

415
408
404
403
399
396
393
392
392
391
389
387
385
385
383
382
380
377
376
376
378
379
380
381

Wednesday 29

Waxing Gibbous 97%

18:18

04:38

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

Sun - Rise: 05:29, Set: 20:25, Transit: 12:57. Moon - Rise: 18:18, Set: 04:38. Civil Dark: 21:04 - 04:47. Nautical Dark: 21:56 - 03:55. Astro Dark: 23:03 - 02:47

Total Clouds (% Sky Obscured)

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

Low 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

Medium 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

High Clouds (% Sky Obscured)

0
0
1
1
1
1
2
2
2
2
2
0
1
1
2
2
2
2
1
2
2
1
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 (%)

2
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
15
17
18
20
20
21
21
21
21
21
20
19
17
17
16
16
16
15
14
14
13
13

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

84
85
84
80
75
70
67
66
66
64
65
66
68
73
76
78
81
82
82
85
85
85
81
82

Pressure (mb)

1028
1028
1028
1028
1029
1029
1029
1029
1028
1028
1028
1028
1027
1027
1027
1027
1027
1027
1027
1027
1027
1026
1026
1026

Ozone (du)

380
380
380
382
382
381
383
383
383
383
383
384
384
384
385
384
383
383
382
381
381
380
379
379

Thursday 30

Waxing Gibbous 99%

19:34

04:50

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

Sun - Rise: 05:27, Set: 20:26, Transit: 12:57. Moon - Rise: 19:34, Set: 04:50. Civil Dark: 21:06 - 04:45. Nautical Dark: 21:59 - 03:52. Astro Dark: 23:07 - 02:43

Total Clouds (% Sky Obscured)

1
2
1
1
2
3
3
3
4
4
3
2
2
0
2
3
2
0
0
0
50
45
23
40

Low 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

Medium 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

High Clouds (% Sky Obscured)

1
1
1
1
1
0
0
0
1
2
1
1
1
0
2
2
2
0
0
0
40
40
18
35

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)

12
12
13
14
16
16
17
17
17
17
17
17
16
15
13
11
10
9
8
8
8
8
8
8

Chance of Frost

Temperature (°C)

9
9
9
11
12
14
15
16
16
17
16
16
16
15
14
12
11
10
10
9
9
9
8
8

Feels Like (°C)

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

Dew Point (°C)

6
6
6
7
6
6
6
5
5
5
5
5
7
7
7
7
7
6
6
6
6
6
6
6

Relative Humidity (%)

82
84
80
76
67
61
55
50
48
47
47
48
54
59
63
71
73
76
77
78
82
84
85
87

Pressure (mb)

1026
1026
1026
1026
1026
1026
1026
1025
1025
1025
1024
1024
1023
1023
1023
1023
1023
1023
1023
1023
1022
1022
1022
1022

Ozone (du)

378
377
376
375
377
379
382
385
387
387
383
383
384
383
381
382
380
378
378
376
375
373
373
374

Friday 1

Full Moon 100%

20:51

05:05

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

Sun - Rise: 05:25, Set: 20:28, Transit: 12:57. Moon - Rise: 20:51, Set: 05:05. Civil Dark: 21:08 - 04:43. Nautical Dark: 22:01 - 03:49. Astro Dark: 23:11 - 02:38

Total Clouds (% Sky Obscured)

35
4
4
5
5
21
20
19
35
30
35
25
2
2
15
29
44
64
80
96
96
92
91
87

Low Clouds (% Sky Obscured)

0
0
0
0
0
1
0
4
5
5
5
0
0
0
0
0
0
16
32
48
54
60
55
65

Medium Clouds (% Sky Obscured)

0
0
0
3
5
21
20
7
3
2
3
0
0
0
3
5
8
17
26
34
33
31
38
43

High Clouds (% Sky Obscured)

30
3
2
4
2
0
2
0
0
0
0
1
1
1
10
17
24
34
44
54
50
51
62
69

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
0
0
0
0
0
0
0
0
0
0
0
0
14
26
37
45
58
81
85

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.2
0.5
0.7

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

9
9
10
12
14
16
17
19
20
20
20
21
21
20
19
17
15
13
12
11
11
10
10
10

Feels Like (°C)

6
6
10
12
14
15
17
18
19
18
19
21
20
21
20
19
19
18
17
16
15
9
10
10

Dew Point (°C)

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

Relative Humidity (%)

85
84
82
75
70
66
65
66
66
67
71
67
55
61
70
76
80
86
87
90
90
90
91
91

Pressure (mb)

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

Ozone (du)

373
373
372
371
369
367
366
365
365
366
365
365
364
363
362
362
361
360
360
360
360
360
360
360

Saturday 2

Waning Gibbous 98%

22:08

05:05

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
01 Bad
02 Bad
03 Bad
04 Bad

Sun - Rise: 05:23, Set: 20:30, Transit: 12:57. Moon - Rise: 22:08, Set: 05:05. Civil Dark: 21:10 - 04:41. Nautical Dark: 22:04 - 03:47. Astro Dark: 23:15 - 02:34

Total Clouds (% Sky Obscured)

72
60
54
48
42
58
75
98
99
99
100
100
100
100
99
99
99
97
95
93
88
80
73
76

Low Clouds (% Sky Obscured)

70
60
54
48
41
35
33
31
37
45
65
75
83
88
88
76
70
68
65
61
59
54
52
60

Medium Clouds (% Sky Obscured)

43
31
21
20
19
23
28
43
49
53
56
71
84
100
98
96
94
88
83
76
61
49
37
56

High Clouds (% Sky Obscured)

72
60
54
48
42
58
75
97
98
99
99
95
90
86
70
51
30
30
35
35
29
33
37
33

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
7
4
2
3
4
5
4
3
2
3
4
5

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

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

Precipitation Probability (%)

63
41
32
11
2
28
30
20
33
38
34
60
80
93
95
95
95
92
87
87
85
85
86
95

Precipitation Amount (mm)

0.3
0
0
0
0
0
0
0
0
0
0
0.2
0.5
0.8
0.8
0.9
1
0.8
0.7
0.7
0.6
0.6
0.6
0.9

Wind Speed/Direction (mph)

5
5
6
7
8
10
10
11
12
12
12
12
11
10
10
10
10
10
11
11
11
12
13
13

Chance of Frost

Temperature (°C)

11
11
11
13
14
15
16
17
17
17
16
15
14
13
12
11
11
10
10
10
9
9
9
9

Feels Like (°C)

9
10
9
11
11
11
12
13
14
15
14
14
13
13
12
7
7
6
7
6
6
4
4
4

Dew Point (°C)

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

Relative Humidity (%)

90
90
88
81
75
70
68
66
65
69
75
80
86
90
95
96
96
96
96
96
96
95
95
95

Pressure (mb)

1017
1017
1017
1017
1017
1017
1017
1017
1016
1016
1016
1016
1015
1015
1015
1015
1015
1015
1015
1014
1014
1014
1014
1014

Ozone (du)

361
362
363
363
364
365
365
365
365
366
367
368
368
368
368
369
370
371
371
370
369
370
371
371

Sunday 3

Waning Gibbous 95%

23:20

05:25

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: 05:21, Set: 20:32, Transit: 12:56. Moon - Rise: 23:20, Set: 05:25. Civil Dark: 21:12 - 04:39. Nautical Dark: 22:06 - 03:44. Astro Dark: 23:19 - 02:29

Total Clouds (% Sky Obscured)

83
90
93
96
100
100
100
100
89
81
72
68
61
52
67
79
93
94
95
97

Low Clouds (% Sky Obscured)

69
78
82
86
90
84
78
71
64
56
48
45
50
52
67
79
93
94
95
97

Medium Clouds (% Sky Obscured)

71
81
88
92
99
99
100
100
83
65
49
38
27
16
25
33
44
61
77
94

High Clouds (% Sky Obscured)

34
25
50
78
100
100
100
100
82
63
40
25
9
1
17
34
51
53
56
58

ISS Passover

Visibility (miles)

5
5
5
4
3
2
4
5
7
8
8
9
9
9
9
6
3
0
0
0

Fog (%)

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

Precipitation Type

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

Precipitation Probability (%)

95
95
95
95
95
95
95
95
95
95
80
70
64
57
46
37
11
15
11
7

Precipitation Amount (mm)

0.9
0.8
0.9
0.9
0.7
1.1
1.2
1
0.8
0.6
0.3
0.3
0.2
0.2
0
0
0
0
0
0

Wind Speed/Direction (mph)

14
14
14
15
15
16
16
17
17
17
16
16
15
15
15
14
13
13
13
13

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

4
4
4
4
4
5
5
6
5
5
5
4
3
3
3
2
2
1
1
0

Dew Point (°C)

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

Relative Humidity (%)

95
95
95
93
95
95
95
93
93
93
93
93
93
93
95
96
96
98
96
96

Pressure (mb)

1013
1013
1013
1013
1013
1013
1012
1012
1012
1012
1011
1011
1011
1011
1011
1011
1011
1011
1011
1011

Ozone (du)

372
373
374
374
374
373
375
377
379
382
385
388
389
390
391
390
389
389
387
386

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

Generated: 27/04/26 04:26:44. Forecast: 27/04/26 to 03/05/26. Timezone: UTC+1.00