Clear Outside v1.0 - International Weather Forecasts For Astronomers

Tuesday 21

Waxing Crescent 23%

09:43

02:44

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

Sun - Rise: 06:32, Set: 20:48, Transit: 13:41. Moon - Rise: 09:43, Set: 02:44. Civil Dark: 21:23 - 05:56. Nautical Dark: 22:08 - 05:11. Astro Dark: 23:00 - 04:18

Total Clouds (% Sky Obscured)

91
78
80
70
60
33
1
6
1
0
0
0
4
0
0
0
0
0
0
0
0
0
0
0

Low Clouds (% Sky Obscured)

33
33
50
33
44
32
1
6
1
0
0
0
4
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

20
23
2
29
17
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
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 (%)

0
0
0
2
4
2
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)

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

Chance of Frost

Temperature (°C)

12
14
14
15
15
14
14
13
11
10
9
8
8
7
6
6
5
5
5
6
7
9
12
13

Feels Like (°C)

8
10
10
11
11
10
10
10
8
7
6
5
5
4
4
4
3
3
2
3
4
6
8
10

Dew Point (°C)

6
7
5
4
5
4
4
4
2
2
1
1
1
1
2
2
2
1
1
1
1
1
1
1

Relative Humidity (%)

64
63
54
48
51
48
50
53
53
55
57
59
63
67
72
76
76
75
76
71
63
55
48
43

Pressure (mb)

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

Ozone (du)

417
419
420
422
421
421
423
424
424
421
416
413
410
410
408
404
399
393
390
391
393
396
399
403

Wednesday 22

Waxing Crescent 34%

11:05

03:28

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
05 Good
06 Good
07 Good
08 Good
09 Good
10 Good
11 Good
12 Good

Sun - Rise: 06:30, Set: 20:49, Transit: 13:41. Moon - Rise: 11:05, Set: 03:28. Civil Dark: 21:25 - 05:54. Nautical Dark: 22:10 - 05:08. Astro Dark: 23:03 - 04:15

Total 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
1
0

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
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 (%)

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
14
14
14
14
12
10
10
10
10
9
8
8
7
7
7
7
7
6
7
8
9
9
9

Chance of Frost

Temperature (°C)

15
15
16
16
17
16
16
15
13
12
11
10
9
8
8
7
6
6
5
6
9
11
13
15

Feels Like (°C)

11
12
12
12
13
13
13
13
11
10
9
9
7
7
6
5
5
4
3
4
7
9
11
12

Dew Point (°C)

2
2
3
3
2
3
4
5
4
4
4
4
4
3
3
2
2
1
1
2
3
3
2
1

Relative Humidity (%)

42
41
40
39
38
41
45
52
54
56
60
63
67
68
70
71
72
74
76
72
65
57
47
38

Pressure (mb)

1026
1026
1026
1026
1025
1025
1025
1025
1026
1027
1027
1028
1028
1028
1028
1029
1029
1029
1029
1029
1030
1030
1030
1029

Ozone (du)

402
401
398
396
395
392
388
388
390
392
392
396
400
402
402
402
398
395
392
388
384
384
382
379

Thursday 23

Waxing Crescent 46%

12:30

03:59

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 OK
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad

Sun - Rise: 06:28, Set: 20:51, Transit: 13:40. Moon - Rise: 12:30, Set: 03:59. Civil Dark: 21:27 - 05:52. Nautical Dark: 22:12 - 05:06. Astro Dark: 23:05 - 04:12

Total Clouds (% Sky Obscured)

1
1
1
0
0
0
0
0
1
2
2
13
25
73
69
65
65
66
66
65
70
68
72
84

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
13
30
25
25
25
30
30
24
24
16
8

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
1
1
13
25
73
69
65
65
66
66
65
70
68
72
84

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)

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

Chance of Frost

Temperature (°C)

16
17
18
18
19
18
17
16
14
12
11
9
8
7
7
6
6
5
5
6
8
10
11
13

Feels Like (°C)

13
14
15
16
16
16
15
14
12
10
9
8
6
6
6
5
4
4
4
5
7
8
10
11

Dew Point (°C)

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

Relative Humidity (%)

35
33
34
33
34
38
43
51
55
56
56
59
62
65
67
71
72
76
78
74
65
56
48
42

Pressure (mb)

1029
1029
1028
1028
1027
1027
1026
1026
1027
1027
1027
1027
1027
1026
1026
1026
1026
1025
1025
1025
1025
1025
1025
1024

Ozone (du)

376
371
368
366
366
369
370
368
366
364
364
364
364
365
365
364
364
364
364
365
365
365
365
365

Friday 24

First Quarter 58%

No Rise

04:20

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

Sun - Rise: 06:26, Set: 20:52, Transit: 13:40. Moon - Rise: No Rise, Set: 04:20. Civil Dark: 21:29 - 05:50. Nautical Dark: 22:15 - 05:03. Astro Dark: 23:08 - 04:09

Total Clouds (% Sky Obscured)

79
59
29
4
17
32
41
31
22
13
10
7
2
2
4
4
21
39
54
36
19
26
26
32

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
18
37
54
36
15
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)

79
58
29
4
17
32
41
31
22
13
10
5
0
0
0
0
0
1
1
1
1
4
4
4

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)

9
10
11
11
12
11
10
9
8
7
6
6
5
5
5
4
3
3
3
4
5
5
6
7

Chance of Frost

Temperature (°C)

14
15
16
16
16
16
15
14
12
11
9
8
8
7
6
6
5
5
5
6
9
11
13
14

Feels Like (°C)

11
12
13
13
13
13
12
12
10
9
8
7
6
6
5
4
4
4
5
5
8
9
10
12

Dew Point (°C)

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

Relative Humidity (%)

39
38
38
40
42
45
52
59
66
73
74
74
77
78
79
80
82
85
85
78
67
56
47
41

Pressure (mb)

1024
1023
1023
1022
1022
1022
1021
1021
1022
1022
1022
1022
1022
1022
1021
1021
1021
1021
1021
1021
1022
1022
1022
1022

Ozone (du)

368
371
378
380
377
376
376
377
377
378
379
380
380
379
378
377
375
372
369
368
366
362
360
360

Saturday 25

Waxing Gibbous 68%

13:53

04:36

13 Good
14 Good
15 Good
16 Good
17 OK
18 OK
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: 06:24, Set: 20:54, Transit: 13:40. Moon - Rise: 13:53, Set: 04:36. Civil Dark: 21:30 - 05:47. Nautical Dark: 22:17 - 05:01. Astro Dark: 23:11 - 04:06

Total Clouds (% Sky Obscured)

6
6
5
2
18
40
71
89
93
100
90
88
94
91
89
87
90
95
100
100
100
100
97
93

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
12
26
38
30
22
12
8
5

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
22
43
60
55
36
36
50
72
100
94
88

High Clouds (% Sky Obscured)

1
1
0
0
18
40
71
87
93
100
90
88
94
91
89
87
90
95
100
100
100
100
87
72

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)

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

Chance of Frost

Temperature (°C)

16
16
17
16
16
15
14
12
10
9
8
7
7
6
6
5
4
5
5
5
6
8
9
10

Feels Like (°C)

12
14
13
13
13
11
11
9
6
5
5
5
4
3
3
2
2
2
2
2
2
2
3
4

Dew Point (°C)

1
1
1
1
2
2
3
4
5
5
5
5
4
3
3
2
2
2
2
2
1
1
1
1

Relative Humidity (%)

37
36
35
35
37
42
49
59
67
76
79
82
81
82
82
83
83
82
80
78
70
64
59
53

Pressure (mb)

1021
1021
1021
1021
1021
1021
1021
1021
1022
1023
1023
1024
1024
1024
1024
1024
1025
1025
1025
1025
1026
1026
1026
1026

Ozone (du)

361
363
364
365
366
368
369
368
366
366
365
365
364
364
364
364
364
365
366
367
368
370
372
373

Sunday 26

Waxing Gibbous 78%

15:13

04:49

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

Sun - Rise: 06:22, Set: 20:56, Transit: 13:40. Moon - Rise: 15:13, Set: 04:49. Civil Dark: 21:32 - 05:45. Nautical Dark: 22:19 - 04:58. Astro Dark: 23:14 - 04:02

Total Clouds (% Sky Obscured)

88
88
89
88
89
90
90
66
38
9
8
5
2
24
46
70
77
82
85
79
74
68
61
53

Low Clouds (% Sky Obscured)

1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

82
76
69
63
46
30
13
10
6
3
3
2
2
13
25
36
54
71
85
79
74
68
51
34

High Clouds (% Sky Obscured)

58
49
41
39
41
64
60
52
33
9
4
1
0
24
46
70
63
32
0
11
23
35
24
12

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)

8
8
8
8
9
8
7
7
6
6
5
5
5
5
4
4
4
3
3
3
5
6
8
8

Chance of Frost

Temperature (°C)

11
13
13
14
14
13
13
12
10
9
7
7
6
6
5
5
5
5
6
6
8
10
12
13

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

50
46
45
44
44
48
54
59
65
69
75
76
79
82
83
88
89
86
85
82
73
63
56
51

Pressure (mb)

1025
1025
1025
1024
1024
1024
1024
1024
1024
1024
1025
1025
1025
1025
1025
1025
1025
1025
1025
1025
1025
1025
1025
1025

Ozone (du)

374
376
375
375
375
376
376
377
378
380
381
383
385
387
390
394
398
404
411
417
418
418
418
415

Monday 27

Waxing Gibbous 86%

16:29

05:01

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

Sun - Rise: 06:20, Set: 20:57, Transit: 13:40. Moon - Rise: 16:29, Set: 05:01. Civil Dark: 21:34 - 05:43. Nautical Dark: 22:21 - 04:56. Astro Dark: 23:17 - 03:59

Total Clouds (% Sky Obscured)

45
54
61
77
76
81
80
72
69
66
41
18
0
0
0
0
0
0
0

Low Clouds (% Sky Obscured)

0
19
39
56
47
38
29
21
11
4
2
1
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

21
21
26
31
31
35
35
38
40
46
31
15
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

0
29
41
55
30
8
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

Fog (%)

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

Precipitation Probability (%)

0
3
4
4
9
11
10
16
14
3
10
6
0
1
1
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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

14
15
15
15
15
14
13
12
11
10
9
9
8
7
6
6
5
5
5

Feels Like (°C)

7
8
12
11
11
11
11
11
8
8
8
8
7
7
3
3
3
3
3

Dew Point (°C)

3
3
2
2
2
1
1
0
0
-0
-1
-1
-1
-1
-1
-1
-1
-1
-1

Relative Humidity (%)

47
43
42
42
41
42
43
44
45
48
50
52
53
56
58
62
65
65
66

Pressure (mb)

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

Ozone (du)

411
408
406
405
403
402
400
399
399
399
399
399
398
398
397
397
396
398
399

Forecast for Brussels, Bruxelles-Capitale, Kingdom of Belgium (50.85,4.35)

Generated: 21/04/26 13:28:47. Forecast: 21/04/26 to 27/04/26. Timezone: UTC+2.00