Clear Outside v1.0 - International Weather Forecasts For Astronomers

Monday 6

Waning Gibbous 78%

02:08

08:09

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

Sun - Rise: 07:03, Set: 20:24, Transit: 13:44. Moon - Rise: 02:08, Set: 08:09. Civil Dark: 20:59 - 06:26. Nautical Dark: 21:42 - 05:43. Astro Dark: 22:29 - 04:56

Total Clouds (% Sky Obscured)

84
88
56
93
89
88
47
31
44
53
28
27
7
0
93
86
1
10
6
15
2
1
6
5

Low Clouds (% Sky Obscured)

15
23
34
35
24
13
3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

0
2
20
20
30
35
16
11
11
13
4
5
0
0
3
3
0
2
3
5
0
0
0
0

High Clouds (% Sky Obscured)

84
27
50
81
41
23
26
29
36
52
28
27
7
0
89
79
1
10
6
15
2
1
6
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
None
None
None
None
None
None
None
None

Precipitation Probability (%)

10
2
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

78
76
66
54
45
40
38
36
35
35
35
36
41
46
49
60
64
66
67
67
70
71
71
71

Pressure (mb)

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

Ozone (du)

375
375
374
372
370
369
370
370
372
372
371
370
369
368
366
365
364
364
364
366
368
368
369
369

Tuesday 7

Waning Gibbous 69%

03:08

08:42

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
05 Good
06 Bad

Sun - Rise: 06:59, Set: 20:26, Transit: 13:44. Moon - Rise: 03:08, Set: 08:42. Civil Dark: 21:01 - 06:24. Nautical Dark: 21:44 - 05:40. Astro Dark: 22:31 - 04:53

Total Clouds (% Sky Obscured)

5
10
11
15
3
2
2
2
2
1
1
1
0
0
0
0
0
0
0
3
1
4
2
62

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)

5
10
11
14
3
2
2
1
0
0
0
0
0
0
0
0
0
0
0
3
0
3
1
62

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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

2
2
3
5
7
9
11
12
12
12
13
13
12
11
9
8
7
6
6
5
4
4
4
3

Dew Point (°C)

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

Relative Humidity (%)

71
69
61
54
51
46
42
39
37
38
40
43
48
55
58
60
62
62
63
66
69
70
72
73

Pressure (mb)

1028
1028
1028
1028
1028
1028
1028
1028
1027
1027
1026
1026
1026
1026
1027
1027
1027
1027
1027
1028
1028
1028
1027
1027

Ozone (du)

371
373
374
374
375
375
375
375
372
368
367
366
365
365
364
364
364
362
360
358
358
358
358
360

Wednesday 8

Waning Gibbous 67%

03:55

09:29

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

Sun - Rise: 06:56, Set: 20:28, Transit: 13:43. Moon - Rise: 03:55, Set: 09:29. Civil Dark: 21:03 - 06:21. Nautical Dark: 21:46 - 05:38. Astro Dark: 22:34 - 04:50

Total Clouds (% Sky Obscured)

44
31
93
83
92
19
55
95
10
8
99
99
100
94
100
96
100
100
100
100
99
99
71
60

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
65
0
0
0
8
45
0
0
0
0
2
29
5
13
24
60
54
67
79
50
29
28

High Clouds (% Sky Obscured)

44
31
93
83
92
17
48
89
6
8
98
98
99
88
100
94
100
100
100
99
98
97
46
41

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)

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

Chance of Frost

Temperature (°C)

5
5
7
9
11
14
15
17
18
18
18
18
17
15
13
12
11
10
9
9
8
8
8
8

Feels Like (°C)

3
3
5
7
9
11
12
13
13
14
14
14
13
11
9
8
8
7
6
6
6
5
5
6

Dew Point (°C)

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

Relative Humidity (%)

75
72
63
56
51
44
42
39
38
39
41
44
49
55
57
58
59
61
62
63
64
63
65
68

Pressure (mb)

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

Ozone (du)

361
364
366
366
366
365
366
367
368
366
367
369
371
372
374
378
380
380
382
384
386
387
388
388

Thursday 9

Waning Gibbous 60%

04:29

10:28

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
05 Bad
06 Bad

Sun - Rise: 06:54, Set: 20:29, Transit: 13:43. Moon - Rise: 04:29, Set: 10:28. Civil Dark: 21:05 - 06:19. Nautical Dark: 21:48 - 05:35. Astro Dark: 22:36 - 04:47

Total Clouds (% Sky Obscured)

59
52
61
63
74
85
96
97
99
100
95
89
84
89
94
100
100
100
100
94
88
83
85
88

Low Clouds (% Sky Obscured)

0
0
0
0
11
22
34
34
37
37
41
44
46
33
17
0
12
24
36
38
39
41
49
46

Medium Clouds (% Sky Obscured)

21
15
9
3
11
14
27
20
69
60
63
29
63
82
50
48
34
65
35
32
50
53
60
56

High Clouds (% Sky Obscured)

59
45
61
63
74
82
85
89
94
100
67
33
0
33
67
100
100
100
100
85
70
55
53
52

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

8
8
10
12
14
16
17
18
18
17
16
15
13
11
11
10
10
10
9
9
9
8
8
8

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

66
65
59
55
56
52
46
42
41
45
49
56
60
68
78
84
84
84
84
85
85
87
88
88

Pressure (mb)

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

Ozone (du)

387
386
387
384
382
381
382
380
378
377
374
372
372
370
368
367
364
363
362
361
359
358
356
354

Friday 10

Third Quarter 50%

04:54

11:38

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 OK
21 OK
22 OK
23 Bad
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad

Sun - Rise: 06:52, Set: 20:31, Transit: 13:43. Moon - Rise: 04:54, Set: 11:38. Civil Dark: 21:07 - 06:16. Nautical Dark: 21:50 - 05:33. Astro Dark: 22:39 - 04:44

Total Clouds (% Sky Obscured)

90
84
79
72
75
80
84
89
95
100
100
95
81
35
34
33
49
67
87
87
91
84
67
51

Low Clouds (% Sky Obscured)

50
49
50
48
45
37
31
21
10
0
0
0
0
35
23
12
24
37
47
52
51
55
47
36

Medium Clouds (% Sky Obscured)

48
59
57
55
56
53
54
30
58
56
29
24
18
2
4
7
13
25
36
35
33
32
16
4

High Clouds (% Sky Obscured)

50
34
17
0
19
38
59
73
86
100
100
95
81
1
1
0
6
13
18
15
12
12
13
15

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
7
8
5
8
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

6
7
8
9
10
12
13
14
14
15
15
15
16
16
18
18
17
17
17
16
13
13
12
12

Dew Point (°C)

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

Relative Humidity (%)

91
90
82
76
71
69
62
59
56
54
52
53
58
64
68
71
76
76
77
79
81
84
86
83

Pressure (mb)

1024
1024
1024
1024
1024
1024
1023
1023
1022
1022
1021
1021
1021
1020
1014
1014
1014
1014
1014
1013
1014
1014
1014
1014

Ozone (du)

355
355
354
352
352
351
351
351
351
350
350
350
351
352
352
352
352
354
356
359
357
355
354
355

Saturday 11

Waning Crescent 40%

05:13

12:55

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

Sun - Rise: 06:50, Set: 20:33, Transit: 13:42. Moon - Rise: 05:13, Set: 12:55. Civil Dark: 21:08 - 06:14. Nautical Dark: 21:52 - 05:30. Astro Dark: 22:41 - 04:40

Total Clouds (% Sky Obscured)

35
39
46
52
39
25
20
30
30
35
40
45
46
60
73
88
84
78
73
78
81
83
88
94

Low Clouds (% Sky Obscured)

30
29
29
26
16
7
0
0
0
0
1
2
3
10
15
16
21
21
21
22
21
16
30
45

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
1
1
6
11
13
21
29
37
32
32
28
38
46
51
52
57

High Clouds (% Sky Obscured)

16
32
46
52
39
25
20
30
30
20
10
5
5
0
5
5
11
16
25
31
30
33
49
70

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
7

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 (%)

3
2
0
0
0
0
0
0
0
0
0
0
0
7
15
10
19
20
8
13
10
0
3
8

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

Chance of Frost

Temperature (°C)

11
10
12
14
15
16
18
19
19
20
19
18
17
16
15
14
14
14
13
13
12
12
11
11

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

81
80
70
63
55
51
48
44
44
44
44
48
54
60
66
71
78
80
83
86
86
87
87
88

Pressure (mb)

1014
1014
1014
1015
1015
1015
1014
1014
1014
1014
1013
1013
1013
1013
1013
1013
1013
1013
1013
1013
1013
1013
1014
1014

Ozone (du)

355
356
358
360
362
362
362
362
361
359
357
357
357
356
355
355
354
355
355
356
355
355
355
355

Sunday 12

Waning Crescent 30%

05:27

14:14

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

Sun - Rise: 06:47, Set: 20:35, Transit: 13:42. Moon - Rise: 05:27, Set: 14:14. Civil Dark: 21:10 - 06:12. Nautical Dark: 21:54 - 05:27. Astro Dark: 22:44 - 04:37

Total Clouds (% Sky Obscured)

99
98
97
96
91
87
82
81
82
83
87
91
95
96
98
100
100
100
100

Low Clouds (% Sky Obscured)

59
63
65
67
64
60
57
49
44
37
26
14
0
15
30
45
32
19
6

Medium Clouds (% Sky Obscured)

53
47
45
36
33
31
26
25
26
29
38
47
56
52
48
45
29
16
5

High Clouds (% Sky Obscured)

92
63
34
10
12
24
35
47
51
54
57
59
60
73
87
100
100
100
100

ISS Passover

Visibility (miles)

5
3
2
2
2
3
3
4
4
4
4
6
8
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 (%)

9
22
22
16
20
14
3
9
10
1
1
2
2
6
7
4
8
9
8

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

12
12
9
10
10
10
10
10
17
16
16
16
16
16
10
10
10
10
9

Dew Point (°C)

9
9
9
9
8
9
9
10
10
10
10
10
10
10
9
9
9
9
9

Relative Humidity (%)

88
91
86
80
75
70
65
61
60
60
60
65
69
75
79
81
85
87
90

Pressure (mb)

1014
1014
1014
1014
1014
1014
1014
1014
1014
1014
1013
1013
1013
1013
1012
1012
1012
1011
1010

Ozone (du)

356
356
357
358
359
360
362
363
365
366
368
369
370
370
370
370
370
370
370

Forecast for Leiden, Gemeente Leiden, Netherlands (52.16,4.50)

Generated: 06/04/26 07:35:09. Forecast: 06/04/26 to 12/04/26. Timezone: UTC+2.00