Clear Outside v1.0 - International Weather Forecasts For Astronomers

Tuesday 21

Waxing Crescent 21%

07:31

04:09

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 OK
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad
15 OK
16 Bad
17 Bad

Sun - Rise: 05:43, Set: 20:56, Transit: 13:20. Moon - Rise: 07:31, Set: 04:09. Civil Dark: 21:45 - 04:53. Nautical Dark: 22:53 - 03:43. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

7
9
6
6
5
3
3
2
3
1
0
0
11
29
82
100
100
100
100
100
61
41
99
98

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
3
16
27
58
75

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
3
26
75
100
100
100
100
61
41
38
0

High Clouds (% Sky Obscured)

7
4
6
6
4
1
1
1
1
1
0
0
11
17
80
100
100
100
100
100
61
41
80
65

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-4
-3
-2
-1
-2
-1
0
0
0
0
-1
-1
-1
-0
1
0
-0
-1
-1
-1
-0
-1
-1
1

Relative Humidity (%)

27
32
39
47
50
53
59
64
66
70
69
68
68
68
67
56
52
50
48
44
43
39
38
44

Pressure (mb)

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

Ozone (du)

400
403
403
401
400
397
398
398
400
400
404
405
401
402
398
393
390
389
388
386
386
388
392
399

Wednesday 22

Waxing Crescent 34%

09:17

04:31

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

Sun - Rise: 05:40, Set: 20:58, Transit: 13:20. Moon - Rise: 09:17, Set: 04:31. Civil Dark: 21:47 - 04:50. Nautical Dark: 22:57 - 03:39. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

76
58
57
47
22
0
0
0
2
0
10
9
20
13
17
31
44
40
24
60
88
97
100
100

Low Clouds (% Sky Obscured)

67
38
36
40
22
0
0
0
0
0
10
6
0
0
0
11
0
29
20
37
33
38
32
27

Medium Clouds (% Sky Obscured)

0
14
49
34
0
0
0
0
0
0
0
0
20
12
15
21
39
10
4
23
28
78
27
96

High Clouds (% Sky Obscured)

30
44
0
0
0
0
0
0
0
0
0
6
0
0
0
1
1
2
2
13
64
51
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
None
None
None

Precipitation Probability (%)

1
3
2
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
13
14
14
13
13
12
14
12
10
10
10
10
9
11
12
12
12
13
12
12
12
12
11

Chance of Frost

Temperature (°C)

12
11
10
9
8
7
6
5
3
2
1
1
-0
0
1
3
4
5
7
8
9
10
10
10

Feels Like (°C)

7
6
6
5
4
3
2
0
-1
-2
-2
-4
-5
-4
-3
-2
-2
0
1
2
3
3
4
5

Dew Point (°C)

1
1
0
-1
-3
-5
-5
-7
-8
-8
-8
-8
-9
-9
-8
-8
-8
-8
-8
-8
-7
-7
-6
-6

Relative Humidity (%)

49
50
49
50
47
43
44
42
42
47
52
53
53
52
51
47
41
38
35
33
32
31
31
32

Pressure (mb)

1005
1005
1005
1006
1007
1008
1008
1009
1010
1010
1010
1011
1012
1012
1012
1012
1013
1012
1012
1012
1011
1010
1010
1009

Ozone (du)

401
401
402
404
404
403
404
403
405
409
411
414
415
418
420
419
417
416
415
415
412
407
402
399

Thursday 23

Waxing Crescent 45%

11:07

04:39

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

Sun - Rise: 05:37, Set: 21:01, Transit: 13:20. Moon - Rise: 11:07, Set: 04:39. Civil Dark: 21:50 - 04:47. Nautical Dark: 23:02 - 03:34. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

100
98
92
69
84
90
98
91
100
100
100
100
100
100
100
100
91
89
83
74
67
72
77
82

Low Clouds (% Sky Obscured)

21
1
1
1
1
1
27
29
48
58
57
52
50
35
12
0
44
44
55
60
57
53
49
45

Medium Clouds (% Sky Obscured)

81
87
54
23
34
86
89
49
71
74
88
55
8
47
72
71
63
61
52
21
34
34
33
31

High Clouds (% Sky Obscured)

100
96
80
47
65
74
95
83
100
100
100
100
99
100
90
89
26
14
7
3
14
18
32
39

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)

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

Chance of Frost

Temperature (°C)

10
9
8
7
5
4
4
3
3
3
2
2
2
3
4
6
7
9
10
10
11
12
12
12

Feels Like (°C)

4
4
3
1
1
1
0
-0
-1
-1
-1
-1
-2
-1
1
3
4
5
7
7
9
8
10
10

Dew Point (°C)

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

Relative Humidity (%)

34
38
40
46
51
54
57
62
65
67
70
73
74
72
62
52
44
39
36
33
30
28
28
29

Pressure (mb)

1009
1009
1009
1009
1009
1008
1008
1008
1007
1007
1007
1007
1007
1007
1007
1008
1008
1008
1007
1007
1007
1006
1006
1006

Ozone (du)

396
392
389
390
390
391
392
392
393
392
389
388
388
388
386
384
384
385
384
383
382
385
387
384

Friday 24

First Quarter 57%

12:51

04:41

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

Sun - Rise: 05:34, Set: 21:03, Transit: 13:20. Moon - Rise: 12:51, Set: 04:41. Civil Dark: 21:53 - 04:43. Nautical Dark: 23:06 - 03:29. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

88
94
100
100
99
99
99
100
100
99
98
97
93
89
85
88
91
94
96
98
100
97
95
93

Low Clouds (% Sky Obscured)

41
38
35
37
39
40
41
41
41
50
59
65
69
70
70
72
73
84
86
87
79
62
39
46

Medium Clouds (% Sky Obscured)

32
34
36
56
70
82
89
94
100
96
93
89
73
68
60
68
79
89
93
97
100
97
95
53

High Clouds (% Sky Obscured)

47
57
52
95
93
89
93
96
97
76
52
20
1
20
20
15
15
15
10
5
10
10
20
5

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

Precipitation Probability (%)

0
0
0
8
12
14
18
19
15
29
38
44
38
30
19
40
55
66
68
65
61
50
37
13

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

10
10
8
6
3
3
2
2
1
1
1
1
1
2
2
4
4
4
4
3
2
3
4
3

Dew Point (°C)

-6
-5
-3
-2
-1
-1
-2
-1
-1
-1
-1
-1
-0
1
1
1
-1
-2
-2
-2
-3
-3
-5
-5

Relative Humidity (%)

30
32
43
55
58
61
62
65
67
67
69
71
76
76
72
66
57
51
51
51
50
49
42
41

Pressure (mb)

1005
1005
1005
1004
1004
1004
1003
1002
1001
1000
999
998
997
996
995
995
994
994
994
994
995
995
995
995

Ozone (du)

381
381
381
381
381
381
381
382
382
382
383
388
391
395
398
398
404
406
409
411
414
416
419
419

Saturday 25

Waxing Gibbous 68%

14:27

04:42

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

Sun - Rise: 05:31, Set: 21:06, Transit: 13:20. Moon - Rise: 14:27, Set: 04:42. Civil Dark: 21:56 - 04:40. Nautical Dark: 23:10 - 03:24. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

71
55
40
40
45
57
47
28
15
14
24
36
24
23
30
49
32
20
33
67
80
90
95
100

Low Clouds (% Sky Obscured)

31
27
20
15
15
15
10
5
5
5
0
0
0
0
0
37
31
20
33
45
60
60
55
60

Medium Clouds (% Sky Obscured)

66
55
40
40
45
57
47
28
15
14
24
36
24
23
25
49
32
20
33
64
49
53
59
71

High Clouds (% Sky Obscured)

4
2
0
0
1
7
10
15
15
10
5
5
5
3
1
1
2
3
3
0
0
5
5
5

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
2
0
0
0
0
0
0
0
1
1
4
6
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
Very Light Rain
Snow
Snow
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

14
22
24
9
15
6
9
12
38
55
58
59
45
36
30
31
30
28
21
14
2
7
7
0

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0.2
0.3
0.1
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

3
1
1
1
1
1
0
-1
-2
-3
-3
-4
-5
-4
-4
-3
-3
-2
-1
-1
-1
-1
3
2

Dew Point (°C)

-4
-1
1
2
1
1
0
0
-1
0
0
0
-1
0
1
1
1
2
3
3
3
4
4
4

Relative Humidity (%)

44
65
80
88
88
86
85
85
83
91
94
96
94
96
94
93
94
93
94
88
83
81
81
82

Pressure (mb)

996
996
997
997
997
998
998
998
999
999
1000
1000
1001
1001
1002
1003
1001
1002
1002
1003
1004
1005
1005
1006

Ozone (du)

420
419
419
419
420
421
422
421
423
423
423
424
425
425
423
422
422
421
420
419
418
417
417
417

Sunday 26

Waxing Gibbous 77%

15:57

04:41

18 Bad
19 Bad
20 Bad
21 Bad
22 OK
23 OK
00 OK
01 OK
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

Sun - Rise: 05:28, Set: 21:08, Transit: 13:20. Moon - Rise: 15:57, Set: 04:41. Civil Dark: 21:59 - 04:37. Nautical Dark: 23:15 - 03:19. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

92
80
50
38
20
10
10
20
35
50
60
65
75
80
80
84
85
81
87
92
97
92
88
84

Low Clouds (% Sky Obscured)

55
49
39
29
15
10
10
20
35
50
60
65
60
55
50
39
26
34
48
59
84
84
80
76

Medium Clouds (% Sky Obscured)

61
53
38
29
17
5
6
8
5
10
10
15
28
20
6
11
11
12
11
11
10
15
14
13

High Clouds (% Sky Obscured)

15
5
5
0
0
0
0
0
5
5
10
34
39
30
25
23
14
11
7
4
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 (%)

1
1
0
1
2
1
3
2
0
0
0
0
0
0
0
1
1
1
4
4
4
4
3
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
13
12
11
10
10
10
10
10
10
10
10
10
10
11
12
13
14
15
15
15
14
14
14

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

2
1
1
1
-1
-1
-1
-1
-1
-2
-2
-3
-4
-2
-2
-1
-1
-1
0
0
1
1
2
2

Dew Point (°C)

4
3
3
3
3
2
2
2
1
1
0
-0
-1
-0
0
1
1
1
0
-0
0
-0
-1
-1

Relative Humidity (%)

82
83
86
88
89
89
91
91
89
88
85
83
80
80
79
77
72
67
62
59
59
58
55
53

Pressure (mb)

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

Ozone (du)

418
418
418
418
417
415
414
416
419
422
424
425
427
429
430
431
431
431
431
428
426
423
422
421

Monday 27

Waxing Gibbous 86%

17:25

04:40

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

Sun - Rise: 05:26, Set: 21:11, Transit: 13:19. Moon - Rise: 17:25, Set: 04:40. Civil Dark: 22:02 - 04:33. Nautical Dark: 23:20 - 03:14. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

72
56
38
26
21
17
18
20
22
15
9
2
1
1
1
18
37
58
72
86
100

Low Clouds (% Sky Obscured)

66
53
38
26
11
2
2
1
1
1
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

9
5
1
1
1
1
0
0
0
0
0
0
0
0
0
13
29
44
58
69
80

High Clouds (% Sky Obscured)

1
1
2
1
1
1
1
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

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
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

Precipitation Amount (mm)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

2
2
2
2
-1
-1
-1
-1
-2
-2
-3
-3
-4
-4
-4
-4
-1
-1
-0
0
0

Dew Point (°C)

-2
-2
-3
-3
-4
-5
-5
-5
-6
-6
-6
-7
-7
-7
-8
-8
-9
-10
-11
-11
-11

Relative Humidity (%)

51
53
55
58
56
57
58
59
59
60
60
60
60
55
49
45
38
32
27
26
25

Pressure (mb)

1018
1018
1019
1019
1020
1020
1020
1020
1021
1021
1021
1021
1021
1022
1022
1022
1022
1021
1021
1021
1021

Ozone (du)

420
419
418
418
417
416
416
417
418
419
420
421
422
421
420
419
420
420
421
422
424

Forecast for Vols, Helsinki, Finland (60.17,24.39)

Generated: 21/04/26 18:22:31. Forecast: 21/04/26 to 27/04/26. Timezone: UTC+3.00