Clear Outside v1.0 - International Weather Forecasts For Astronomers

Wednesday 31

Waxing Gibbous 88%

13:59

07:15

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
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad

Sun - Rise: 08:51, Set: 16:39, Transit: 12:45. Moon - Rise: 13:59, Set: 07:15. Civil Dark: 17:20 - 08:10. Nautical Dark: 18:04 - 07:26. Astro Dark: 18:45 - 06:45

Total Clouds (% Sky Obscured)

96
94
94
83
88
98
98
100
100
100
100
100
82
87
72
100
100
100
100
100
100
100
100
99

Low Clouds (% Sky Obscured)

90
92
93
78
85
97
93
100
79
76
88
78
78
70
52
51
64
54
54
68
66
72
79
74

Medium Clouds (% Sky Obscured)

0
0
0
0
2
3
24
28
100
100
100
90
0
55
21
37
57
100
100
100
100
100
100
56

High Clouds (% Sky Obscured)

16
1
13
5
1
16
58
100
100
100
100
100
48
48
20
100
100
100
18
0
0
0
0
0

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
8
9
3
9
8
5
7
5
6
3
1
4
3
6
3

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

Precipitation Probability (%)

0
0
32
28
19
6
15
8
31
42
70
67
58
65
66
65
73
77
85
85
88
84
85
86

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0.3
0.3
0
0.4
0.4
0.3
0.5
0.5
0.5
0.6
0.6
0.6
0.6
0.6

Wind Speed/Direction (mph)

17
18
19
20
21
21
22
23
24
25
25
28
24
23
22
23
24
24
24
26
26
26
28
29

Chance of Frost

Temperature (°C)

5
5
5
5
5
5
5
5
5
5
5
5
6
6
6
6
6
5
5
5
5
5
5
5

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

82
82
80
79
78
79
79
79
79
88
86
88
83
70
70
70
72
74
76
88
79
78
73
71

Pressure (mb)

1016
1015
1014
1013
1012
1011
1009
1008
1007
1005
1005
1004
1004
1003
1003
1002
1002
1001
1001
1000
1000
1000
999
999

Ozone (du)

295
290
287
286
284
280
279
283
293
307
316
337
363
381
385
397
399
402
394
383
377
371
361
360

Thursday 1

Waxing Gibbous 97%

15:00

08:33

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
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad

Sun - Rise: 08:51, Set: 16:40, Transit: 12:45. Moon - Rise: 15:00, Set: 08:33. Civil Dark: 17:21 - 08:10. Nautical Dark: 18:04 - 07:26. Astro Dark: 18:46 - 06:45

Total Clouds (% Sky Obscured)

99
87
95
98
100
100
99
99
100
100
90
100
100
100
100
100
100
100
100
100
100
99
100
100

Low Clouds (% Sky Obscured)

83
68
75
70
61
74
85
80
65
62
52
54
65
68
28
22
23
0
29
31
45
40
41
51

Medium Clouds (% Sky Obscured)

87
54
59
52
86
51
89
90
100
100
74
100
100
100
100
100
100
100
100
100
100
90
100
100

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)

6
8
8
7
1
2
6
7
6
6
8
3
1
7
8
8
6
6
6
7
8
8
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
Very Light Rain
Very Light Rain
Light Rain
Very Light Rain
Very Light Rain
Very Light Rain
Light Rain
Light Rain
Light Rain
Snow
Snow
Light Rain
Snow
Sleet
Sleet
Sleet
Sleet
None
Snow
Snow
Snow
None
None

Precipitation Probability (%)

85
67
65
73
69
67
72
80
76
71
78
95
95
79
74
63
58
58
53
47
52
50
40
44

Precipitation Amount (mm)

0.5
0.3
0.3
0.4
0.3
0.3
0.3
0.5
0.5
0.5
0.4
1.1
1
0.5
0.4
0.3
0.3
0.3
0
0.1
0.2
0.2
0
0

Wind Speed/Direction (mph)

29
28
26
27
27
24
22
22
24
22
24
26
22
18
16
19
22
20
20
18
17
19
17
13

Chance of Frost

Temperature (°C)

5
4
5
4
4
4
4
4
4
4
4
4
3
4
4
4
4
4
4
4
4
4
4
3

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

66
66
63
67
72
66
60
62
66
60
62
71
89
76
67
63
68
64
66
68
63
66
64
64

Pressure (mb)

999
999
998
998
999
998
998
997
998
998
998
998
999
999
999
999
999
1000
1000
1000
1001
1001
1002
1002

Ozone (du)

358
358
367
369
375
376
380
383
382
384
389
393
394
400
410
416
418
416
415
417
420
420
417
410

Friday 2

Waxing Gibbous 100%

16:21

09:29

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
18 Bad
19 Bad
20 Bad
21 Bad
22 OK

Sun - Rise: 08:50, Set: 16:41, Transit: 12:46. Moon - Rise: 16:21, Set: 09:29. Civil Dark: 17:22 - 08:10. Nautical Dark: 18:06 - 07:26. Astro Dark: 18:47 - 06:45

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
98
18
100
83
94
84
85
96
72
53
64
55
36

Low Clouds (% Sky Obscured)

52
51
37
27
28
42
37
7
52
56
39
23
1
0
26
26
46
38
47
46
46
47
47
32

Medium Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
88
72
18
100
43
85
47
63
88
61
14
57
6
6

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

Snow
Snow
Snow
None
Very Light Rain
Very Light Rain
Light Rain
Snow
Snow
Snow
Snow
Snow
None
Snow
Sleet
Snow
None
Snow
Snow
Snow
None
None
None
None

Precipitation Probability (%)

75
86
63
47
68
66
80
67
66
71
70
51
48
50
50
46
30
44
46
44
15
7
6
7

Precipitation Amount (mm)

0.4
0.8
0.3
0
0.2
0.2
0.5
0.3
0.4
0.4
0.4
0.1
0
0.2
0.2
0.2
0
0.1
0.1
0.1
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-3
-2
-1
-2
-2
-1
-1
-2
-2
-2
-3
-3
-3
-3
-3
-2
-2
-3
-3
-2
-5
-7
-8
-8

Relative Humidity (%)

67
70
77
76
73
77
79
73
73
73
70
70
64
63
61
66
68
68
68
69
56
51
50
50

Pressure (mb)

1002
1002
1002
1002
1002
1002
1002
1002
1002
1002
1003
1004
1004
1005
1005
1006
1006
1007
1008
1008
1009
1010
1010
1011

Ozone (du)

398
384
372
366
364
362
362
368
371
374
383
389
395
399
397
398
396
397
395
394
394
393
393
389

Saturday 3

Full Moon 99%

17:52

10:06

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

Sun - Rise: 08:50, Set: 16:42, Transit: 12:46. Moon - Rise: 17:52, Set: 10:06. Civil Dark: 17:23 - 08:10. Nautical Dark: 18:07 - 07:26. Astro Dark: 18:48 - 06:45

Total Clouds (% Sky Obscured)

30
43
54
72
100
94
89
82
76
75
65
71
72
71
70
71
71
70
68
68
73
78
84
89

Low Clouds (% Sky Obscured)

18
3
18
33
50
51
49
58
59
62
45
48
43
40
54
47
51
51
55
52
53
55
56
60

Medium Clouds (% Sky Obscured)

8
43
54
54
100
94
89
82
61
75
26
71
69
69
67
62
54
58
66
68
73
78
81
88

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
1
5
8
9
9
8
8
8
8
7
9
9
8
9
9
7
7
1
7
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

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

Precipitation Probability (%)

8
8
19
49
75
61
68
76
67
62
54
47
52
48
48
45
46
38
44
57
68
68
61
62

Precipitation Amount (mm)

0
0
0
0.2
0.6
0.2
0.4
0.5
0.4
0.3
0.2
0.2
0.2
0
0.2
0
0
0
0
0.2
0.4
0.4
0.3
0.4

Wind Speed/Direction (mph)

11
11
9
7
12
10
11
11
12
11
12
12
13
13
14
13
13
13
12
11
11
12
13
12

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-8
-8
-8
-8
-4
-2
-3
-3
-4
-4
-4
-4
-4
-4
-3
-3
-3
-3
-3
-2
-3
-2
-1
-2

Relative Humidity (%)

51
49
50
50
68
83
70
74
66
64
61
60
56
56
59
60
59
62
64
67
67
70
72
69

Pressure (mb)

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

Ozone (du)

390
386
380
377
370
373
383
381
378
380
386
386
386
385
381
378
378
376
376
380
380
380
384
386

Sunday 4

Waning Gibbous 96%

19:24

10:30

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
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad

Sun - Rise: 08:50, Set: 16:44, Transit: 12:47. Moon - Rise: 19:24, Set: 10:30. Civil Dark: 17:24 - 08:09. Nautical Dark: 18:08 - 07:26. Astro Dark: 18:49 - 06:44

Total Clouds (% Sky Obscured)

95
100
100
100
100
100
100
100
88
76
62
62
60
61
72
85
100
100
100
100
96
93
89
90

Low Clouds (% Sky Obscured)

64
67
61
57
52
55
58
62
59
55
52
53
51
49
55
64
72
66
59
53
61
69
77
75

Medium Clouds (% Sky Obscured)

93
100
100
99
100
100
100
100
81
66
53
57
54
56
71
85
100
75
47
20
17
19
16
22

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)

6
6
9
7
7
2
0
0
0
2
4
5
5
5
6
7
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

Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Sleet
Snow
Snow
Light Rain
Light Rain
Very Light Rain
Very Light Rain
Very Light Rain
Very Light Rain
None

Precipitation Probability (%)

63
63
58
67
79
87
95
95
90
90
82
70
61
48
63
66
69
69
69
67
60
54
50
45

Precipitation Amount (mm)

0.4
0.4
0.3
0.4
0.6
0.8
0.8
1.8
0.7
0.8
0.7
0.5
0.4
0.2
0.3
0.3
0.3
0.4
0.4
0.3
0.3
0.2
0.2
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

3
3
3
4
3
3
3
3
2
2
3
3
4
4
4
4
4
3
3
3
3
3
3
3

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

69
69
68
67
71
71
93
91
96
91
85
80
73
68
66
67
66
64
64
64
64
63
61
58

Pressure (mb)

1014
1014
1014
1013
1013
1013
1013
1013
1013
1013
1014
1014
1014
1014
1014
1014
1014
1014
1014
1015
1015
1016
1016
1016

Ozone (du)

391
392
394
396
396
396
394
390
392
395
400
402
408
401
400
401
403
404
402
399
397
396
396
396

Monday 5

Waning Gibbous 91%

20:50

10:47

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
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad

Sun - Rise: 08:49, Set: 16:45, Transit: 12:47. Moon - Rise: 20:50, Set: 10:47. Civil Dark: 17:25 - 08:09. Nautical Dark: 18:09 - 07:25. Astro Dark: 18:50 - 06:44

Total Clouds (% Sky Obscured)

82
79
71
72
73
83
91
99
99
98
98
99
99
100
100
100
100
100
100
100
100
100
100
97

Low Clouds (% Sky Obscured)

72
70
67
61
58
53
48
45
56
68
79
79
78
77
80
79
78
74
73
69
58
47
39
53

Medium Clouds (% Sky Obscured)

29
37
38
35
33
54
76
98
94
89
82
86
89
93
95
96
97
98
99
100
100
100
100
93

High Clouds (% Sky Obscured)

0
0
0
1
1
2
2
3
15
27
39
42
45
44
33
13
0
0
0
0
0
0
0
0

ISS Passover

Visibility (miles)

9
9
9
9
9
9
8
8
7
8
8
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
Very Light Rain
None
Snow
Snow
Snow
Snow
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
Very Light Rain
Light Rain
Very Light Rain

Precipitation Probability (%)

42
43
39
40
45
42
40
40
49
59
69
67
69
71
72
71
70
75
78
81
73
66
65
54

Precipitation Amount (mm)

0
0.2
0
0.2
0.3
0.2
0.1
0
0
0.3
0.5
0.4
0.4
0.4
0.4
0.4
0.4
0.5
0.5
0.5
0.4
0.3
0.4
0.2

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

3
3
3
3
3
3
3
3
3
3
3
4
4
4
5
4
4
4
4
4
4
4
4
4

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

58
58
59
64
68
72
74
77
79
76
71
67
64
62
60
62
64
68
66
64
63
61
61
59

Pressure (mb)

1016
1016
1016
1016
1016
1016
1016
1016
1016
1016
1016
1016
1016
1016
1016
1016
1016
1015
1015
1016
1016
1016
1016
1016

Ozone (du)

399
401
404
401
397
394
390
387
383
378
373
367
368
368
368
369
370
371
372
373
374
376
377
378

Tuesday 6

Waning Gibbous 83%

22:11

10:59

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
18 Bad

Sun - Rise: 08:49, Set: 16:46, Transit: 12:48. Moon - Rise: 22:11, Set: 10:59. Civil Dark: 17:26 - 08:09. Nautical Dark: 18:10 - 07:25. Astro Dark: 18:51 - 06:44

Total Clouds (% Sky Obscured)

93
91
90
87
85
61
39
18
31
48
67
64
66
63
72
81
86
68
50
32

Low Clouds (% Sky Obscured)

62
71
63
56
49
34
18
1
15
28
42
51
59
63
55
47
38
36
34
32

Medium Clouds (% Sky Obscured)

86
79
76
73
67
46
29
15
20
25
30
30
25
20
20
20
10
7
4
1

High Clouds (% Sky Obscured)

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

ISS Passover

Visibility (miles)

6
3
0
3
6
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

Precipitation Type

None
Light Rain
Very Light Rain
Very Light Rain
Very Light Rain
None
None
None
None
None
None
None
None
None
None
Very Light Rain
Sleet
Snow
None
Snow

Precipitation Probability (%)

53
65
64
62
56
47
42
46
40
34
33
33
32
39
46
53
66
52
38
32

Precipitation Amount (mm)

0
0.4
0.3
0.3
0.3
0
0
0
0
0
0
0
0
0
0
0.3
0.5
0.2
0
0.1

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

4
3
3
4
4
4
4
4
4
4
4
3
4
5
5
5
4
4
3
3

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

69
82
96
89
80
73
73
73
72
72
71
71
67
65
61
65
66
68
68
69

Pressure (mb)

1016
1016
1015
1015
1015
1015
1016
1016
1016
1017
1018
1018
1019
1019
1019
1019
1019
1020
1020
1020

Ozone (du)

377
377
376
377
377
377
377
378
379
379
379
380
377
373
370
369
368
367
348
329

Forecast for Overveen, Gemeente Bloemendaal, Netherlands (52.39,4.61)

Generated: 31/12/25 23:00:46. Forecast: 31/12/25 to 06/01/26. Timezone: UTC+1.00