Clear Outside v1.0 - International Weather Forecasts For Astronomers

Monday 5

Waning Gibbous 94%

19:25

10:29

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 OK
01 OK
02 Good

Sun - Rise: 08:49, Set: 16:45, Transit: 12:47. Moon - Rise: 19:25, Set: 10:29. Civil Dark: 17:25 - 08:09. Nautical Dark: 18:09 - 07:26. Astro Dark: 18:50 - 06:44

Total Clouds (% Sky Obscured)

49
68
82
99
100
100
57
39
13
39
59
83
85
84
93
100
99
96
98
91
83
35
24
2

Low Clouds (% Sky Obscured)

47
56
58
49
77
36
31
39
5
28
37
48
38
42
19
0
35
51
46
41
45
35
24
0

Medium Clouds (% Sky Obscured)

49
68
82
99
100
100
57
39
13
13
29
46
85
77
67
87
51
48
87
89
76
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
4
0
0
0
0
6
6
8
7
8
3
5
8
9
8
8
5
3
8
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
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
None
None
Snow
None
Snow
Snow
Snow
None
None
None
None

Precipitation Probability (%)

13
5
66
95
95
54
43
45
41
45
42
52
51
37
32
31
36
49
62
53
12
1
0
0

Precipitation Amount (mm)

0
0
0.3
1.6
0.9
0.1
0.1
0.1
0.1
0.2
0.1
0.2
0.2
0
0
0.1
0
0.2
0.4
0.3
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

71
75
84
98
96
98
98
96
91
83
74
68
72
76
76
80
80
83
83
84
84
78
74
73

Pressure (mb)

1008
1008
1008
1007
1007
1008
1008
1009
1009
1009
1009
1009
1009
1009
1009
1010
1010
1010
1011
1011
1012
1013
1014
1014

Ozone (du)

394
398
400
403
405
408
403
398
397
407
414
410
408
406
409
413
417
415
412
408
404
404
406
404

Tuesday 6

Waning Gibbous 91%

20:51

10:46

03 OK
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
01 Bad
02 Bad

Sun - Rise: 08:49, Set: 16:46, Transit: 12:48. Moon - Rise: 20:51, Set: 10:46. Civil Dark: 17:26 - 08:09. Nautical Dark: 18:10 - 07:25. Astro Dark: 18:51 - 06:44

Total Clouds (% Sky Obscured)

21
59
46
50
88
99
75
69
44
46
80
94
87
100
100
99
100
91
90
93
98
97
100
100

Low Clouds (% Sky Obscured)

21
45
28
50
64
50
65
47
21
10
38
38
78
91
100
85
100
72
72
84
82
76
55
93

Medium Clouds (% Sky Obscured)

1
45
45
13
78
99
1
14
23
36
60
84
87
100
100
62
77
84
76
86
94
92
100
100

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
5
10
5
5
22
10
54
69

ISS Passover

Visibility (miles)

9
9
9
9
6
0
0
0
1
7
9
9
9
9
9
9
0
5
6
6
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
Snow
Snow
Snow
None
None
None
None
None
None
None
Light Rain
Light Rain
Very Light Rain
None
Light Rain
None
None
None
None
None

Precipitation Probability (%)

0
2
5
34
80
81
57
15
18
7
14
15
2
22
69
80
58
47
54
40
34
19
23
76

Precipitation Amount (mm)

0
0
0
0
0.7
0.7
0.3
0
0
0
0
0
0
0
0.4
0.7
0.3
0
0.4
0
0
0
0
0

Wind Speed/Direction (mph)

4
2
1
3
4
3
3
3
2
2
5
7
8
7
6
6
8
10
11
12
12
13
14
16

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

75
78
80
80
81
98
100
98
96
93
88
85
74
72
77
78
91
96
93
89
86
88
86
86

Pressure (mb)

1014
1015
1015
1015
1015
1015
1016
1016
1016
1016
1015
1015
1015
1014
1014
1014
1013
1013
1013
1012
1012
1011
1010
1009

Ozone (du)

404
407
407
405
400
398
398
392
388
387
386
388
390
387
386
392
390
392
388
380
381
386
387
392

Wednesday 7

Waning Gibbous 83%

22:12

10:59

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
01 Bad
02 Bad

Sun - Rise: 08:48, Set: 16:48, Transit: 12:48. Moon - Rise: 22:12, Set: 10:59. Civil Dark: 17:28 - 08:08. Nautical Dark: 18:11 - 07:25. Astro Dark: 18:52 - 06:44

Total Clouds (% Sky Obscured)

100
100
100
98
100
96
99
95
94
93
68
60
95
100
100
100
100
99
99
99
100
100
100
100

Low Clouds (% Sky Obscured)

97
98
92
86
100
92
99
93
88
90
64
54
70
84
89
97
92
85
78
80
79
84
85
95

Medium Clouds (% Sky Obscured)

100
100
100
95
55
47
42
85
72
37
15
19
0
45
48
23
32
40
47
49
52
47
61
90

High Clouds (% Sky Obscured)

5
5
4
0
0
0
0
0
0
5
5
7
88
99
99
86
50
64
82
89
95
100
100
100

ISS Passover

Visibility (miles)

5
0
0
0
0
0
7
7
8
9
9
9
6
7
9
9
8
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

Light Rain
Light Rain
Light Rain
Snow
Snow
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

95
95
95
95
94
46
44
39
34
29
16
32
39
42
34
34
37
33
21
15
12
12
23
29

Precipitation Amount (mm)

0.9
1.2
1.2
2.3
0.6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

18
20
19
18
17
19
8
4
5
9
11
14
14
14
15
14
14
14
12
12
11
10
9
9

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

93
98
98
98
98
100
98
96
93
83
76
68
71
72
72
73
72
69
68
69
69
69
68
65

Pressure (mb)

1009
1008
1006
1006
1005
1005
1005
1006
1006
1007
1007
1007
1007
1007
1008
1008
1009
1009
1009
1009
1009
1009
1009
1009

Ozone (du)

394
396
395
397
396
397
397
397
387
381
379
382
381
366
346
333
327
323
322
319
322
325
325
323

Thursday 8

Waning Gibbous 74%

23:29

11:10

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
01 Bad
02 Bad

Sun - Rise: 08:48, Set: 16:49, Transit: 12:48. Moon - Rise: 23:29, Set: 11:10. Civil Dark: 17:29 - 08:08. Nautical Dark: 18:12 - 07:25. Astro Dark: 18:53 - 06:44

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
95
90

Low Clouds (% Sky Obscured)

82
99
93
99
90
80
72
69
65
64
60
56
55
70
85
100
100
100
100
93
87
81
80
77

Medium Clouds (% Sky Obscured)

85
91
96
99
93
41
43
48
100
100
98
100
100
100
100
100
100
100
100
98
95
92
76
61

High Clouds (% Sky Obscured)

99
100
100
99
90
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
67
33

ISS Passover

Visibility (miles)

9
9
9
9
4
0
0
0
0
0
0
0
8
8
8
8
8
5
3
1
0
1
1
6

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
Very Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain

Precipitation Probability (%)

34
29
19
18
37
44
40
37
29
11
5
10
20
40
52
67
91
95
95
95
95
95
95
95

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.2
0.5
1.1
1.8
1.6
1.4
1.1
0.9
0.6

Wind Speed/Direction (mph)

8
7
6
8
8
8
7
8
8
8
8
8
7
6
6
7
8
9
10
11
13
14
16
18

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

69
74
79
83
96
98
98
96
98
98
98
98
98
100
98
96
96
98
98
98
96
98
98
95

Pressure (mb)

1009
1008
1008
1008
1008
1008
1008
1008
1007
1007
1007
1006
1005
1005
1004
1003
1001
1000
998
996
994
992
990
988

Ozone (du)

324
323
326
327
328
329
331
336
337
333
332
329
330
331
330
330
331
331
331
331
332
333
336
335

Friday 9

Waning Gibbous 64%

00:43

11:20

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
01 Bad
02 Bad

Sun - Rise: 08:47, Set: 16:50, Transit: 12:49. Moon - Rise: 00:43, Set: 11:20. Civil Dark: 17:30 - 08:07. Nautical Dark: 18:13 - 07:24. Astro Dark: 18:54 - 06:43

Total Clouds (% Sky Obscured)

84
89
94
100
100
100
100
99
98
97
98
99
100
100
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

76
83
92
100
100
100
100
97
95
92
92
92
92
91
91
90
91
91
92
88
83
79
86
93

Medium Clouds (% Sky Obscured)

45
64
80
100
70
70
70
63
61
63
75
84
100
100
100
100
100
100
100
100
100
100
100
100

High Clouds (% Sky Obscured)

0
0
0
5
5
0
0
0
0
0
3
5
8
33
59
84
70
57
43
29
14
2
3
3

ISS Passover

Visibility (miles)

4
3
3
4
9
9
8
9
9
9
5
4
3
2
2
2
2
2
3
3
3
3
3
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

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
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

Precipitation Probability (%)

95
95
88
77
84
95
95
95
95
95
95
95
95
95
95
95
95
88
78
72
66
59
59
57

Precipitation Amount (mm)

0.7
0.6
0.5
0.4
0.6
0.8
0.8
0.7
0.7
0.7
1.3
1.1
1
0.9
0.8
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.3
0.2

Wind Speed/Direction (mph)

19
21
23
26
27
26
25
26
27
27
29
29
29
29
28
28
28
28
27
26
25
23
22
21

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

7
7
7
7
3
1
1
1
1
1
1
2
1
2
2
3
4
4
3
3
2
2
1
1

Relative Humidity (%)

95
93
90
88
81
76
78
76
75
75
75
76
76
78
83
88
94
93
89
88
83
82
78
76

Pressure (mb)

987
985
982
981
980
981
981
982
982
983
983
983
984
985
986
987
988
990
991
992
993
994
995
996

Ozone (du)

336
339
339
343
357
368
372
382
390
376
380
385
391
396
393
390
387
391
394
398
398
399
399
397

Saturday 10

Third Quarter 54%

01:57

11:30

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
01 Bad
02 Bad

Sun - Rise: 08:47, Set: 16:52, Transit: 12:49. Moon - Rise: 01:57, Set: 11:30. Civil Dark: 17:32 - 08:07. Nautical Dark: 18:15 - 07:24. Astro Dark: 18:55 - 06:43

Total Clouds (% Sky Obscured)

100
99
99
98
94
90
86
85
83
79
75
74
73
69
66
64
59
57
56
71
84
100
99
98

Low Clouds (% Sky Obscured)

100
96
92
88
85
82
77
71
64
56
59
61
63
61
61
61
50
37
25
42
59
74
78
82

Medium Clouds (% Sky Obscured)

100
99
97
96
75
55
33
32
31
30
28
25
20
17
14
11
12
14
15
43
71
99
81
66

High Clouds (% Sky Obscured)

11
20
31
33
36
19
2
1
1
0
0
0
0
1
0
2
2
4
10
38
68
95
88
82

ISS Passover

Visibility (miles)

7
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
8

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

Precipitation Probability (%)

53
60
64
66
61
54
43
44
39
24
26
23
9
16
16
12
15
13
1
4
7
15
37
54

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

21
21
19
18
17
16
15
13
12
11
10
9
8
7
6
4
3
3
3
4
4
5
6
7

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

75
73
72
71
72
68
67
65
62
61
58
60
62
65
71
76
83
83
82
82
82
83
83
86

Pressure (mb)

998
999
1000
1001
1002
1004
1005
1006
1007
1009
1010
1011
1011
1012
1013
1013
1014
1014
1014
1014
1013
1012
1012
1010

Ozone (du)

396
394
390
386
382
383
385
386
382
379
375
372
368
364
360
357
353
350
346
342
337
331
326
326

Sunday 11

Waning Crescent 45%

No Rise

11:41

Sun - Rise: 08:46, Set: 16:53, Transit: 12:50. Moon - Rise: No Rise, Set: 11:41. Civil Dark: 17:33 - 08:06. Nautical Dark: 18:16 - 07:23. Astro Dark: 18:57 - 06:43

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 Leiden, Gemeente Leiden, Netherlands (52.16,4.50)

Generated: 05/01/26 02:57:59. Forecast: 05/01/26 to 11/01/26. Timezone: UTC+1.00