Clear Outside v1.0 - International Weather Forecasts For Astronomers

Saturday 29

Waning Gibbous 96%

20:46

No Set

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
07 Bad
08 Bad

Sun - Rise: 06:48, Set: 20:33, Transit: 13:40. Moon - Rise: 20:46, Set: No Set. Civil Dark: 21:09 - 06:13. Nautical Dark: 21:53 - 05:29. Astro Dark: 22:42 - 04:40

Total Clouds (% Sky Obscured)

76
74
61
97
99
100
100
100
98
100
90
100
100
100
97
100
100
98
94
88
80
69
62
82

Low Clouds (% Sky Obscured)

51
57
30
49
56
53
16
54
43
90
84
75
40
68
87
88
87
78
88
77
68
66
56
73

Medium Clouds (% Sky Obscured)

18
23
20
26
30
100
99
100
97
100
81
46
100
100
93
52
20
23
23
11
10
17
7
14

High Clouds (% Sky Obscured)

0
4
30
44
98
100
100
94
45
48
0
65
53
100
73
61
66
4
0
2
1
0
1
4

ISS Passover

Visibility (miles)

9
9
9
9
9
7
7
9
9
9
6
7
9
3
2
6
9
9
9
8
6
7
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
Light Rain
Light Rain
None
Light Rain
Light Rain
Light Rain
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

0
0
6
10
28
39
38
43
37
90
80
43
95
95
95
61
42
35
40
44
39
38
41
20

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0.8
0.4
0
0.7
2
1.9
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

15
16
16
15
16
15
16
15
11
12
12
13
12
13
13
16
18
21
21
19
18
16
14
13

Chance of Frost

Temperature (°C)

18
19
20
20
21
22
23
22
20
20
18
18
18
18
17
18
18
18
18
18
18
18
18
18

Feels Like (°C)

16
17
18
18
19
20
20
19
19
18
16
16
16
16
16
16
16
15
14
15
15
16
17
18

Dew Point (°C)

13
13
13
12
12
16
17
17
18
17
17
17
16
17
17
17
17
17
17
17
17
17
17
17

Relative Humidity (%)

74
70
62
57
56
66
69
74
84
82
90
92
92
93
96
95
90
92
90
93
93
92
92
92

Pressure (mb)

1010
1010
1010
1010
1010
1009
1009
1009
1009
1008
1008
1007
1007
1006
1006
1005
1004
1004
1004
1004
1005
1006
1006
1007

Ozone (du)

314
309
306
306
304
302
302
302
302
303
305
306
305
303
304
308
304
301
301
301
302
301
302
302

Sunday 30

Waning Gibbous 91%

20:57

09:28

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
07 Bad
08 Bad

Sun - Rise: 06:50, Set: 20:31, Transit: 13:40. Moon - Rise: 20:57, Set: 09:28. Civil Dark: 21:06 - 06:15. Nautical Dark: 21:50 - 05:31. Astro Dark: 22:39 - 04:42

Total Clouds (% Sky Obscured)

92
91
93
90
75
65
100
100
100
100
100
100
100
96
98
54
100
100
100
91
93
100
100
100

Low Clouds (% Sky Obscured)

81
83
91
89
39
65
63
46
33
2
15
3
3
21
60
39
72
17
21
36
48
70
78
94

Medium Clouds (% Sky Obscured)

11
11
10
11
5
12
0
31
28
25
100
100
100
82
76
54
90
100
100
4
4
9
44
20

High Clouds (% Sky Obscured)

2
2
18
28
34
31
100
100
100
100
100
100
100
88
53
6
100
100
100
74
93
100
100
81

ISS Passover

Visibility (miles)

9
9
8
8
9
9
9
9
9
8
7
6
9
8
7
3
9
9
9
7
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
None
None
None
None
None
None
None
None
None
None
None
Very Light Rain
Very Light Rain
Light Rain
None
None
None
None
Very Light Rain
None
None
Very Light Rain

Precipitation Probability (%)

26
31
35
29
18
6
4
10
21
24
27
23
35
55
68
66
27
26
29
46
71
35
53
58

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

19
19
20
20
21
21
22
22
22
21
21
20
19
18
17
17
16
16
16
16
16
16
16
16

Feels Like (°C)

17
17
18
18
19
18
19
20
20
20
21
20
19
18
17
16
16
15
15
14
14
13
13
13

Dew Point (°C)

16
17
17
17
17
15
15
15
14
15
17
17
17
17
16
16
16
15
15
15
15
15
15
15

Relative Humidity (%)

86
86
85
85
80
67
64
62
61
67
76
85
88
92
93
93
95
93
93
95
95
95
95
95

Pressure (mb)

1008
1009
1010
1010
1011
1011
1011
1011
1011
1011
1011
1011
1011
1011
1010
1010
1009
1009
1009
1008
1008
1008
1008
1008

Ozone (du)

302
302
302
301
301
301
302
303
304
304
305
305
307
309
312
317
323
323
322
323
327
331
330
330

Monday 31

Waning Gibbous 83%

21:10

10:49

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

Sun - Rise: 06:52, Set: 20:29, Transit: 13:39. Moon - Rise: 21:10, Set: 10:49. Civil Dark: 21:04 - 06:16. Nautical Dark: 21:48 - 05:33. Astro Dark: 22:36 - 04:45

Total Clouds (% Sky Obscured)

99
91
80
86
85
92
100
99
100
81
22
19
18
18
23
26
66
79
90
100
100
100
94
92

Low Clouds (% Sky Obscured)

77
75
62
65
62
64
62
76
56
23
18
15
15
16
17
20
20
23
23
24
26
26
29
29

Medium Clouds (% Sky Obscured)

18
8
6
15
6
27
2
0
28
51
0
1
2
3
3
2
2
1
0
0
10
19
29
25

High Clouds (% Sky Obscured)

81
75
75
80
80
75
75
75
80
80
0
0
0
0
2
3
56
71
85
100
99
98
88
77

ISS Passover

Visibility (miles)

7
6
7
8
9
6
8
8
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

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

Precipitation Probability (%)

83
90
84
75
73
67
72
43
41
37
11
8
10
8
13
13
6
12
13
3
5
3
3
17

Precipitation Amount (mm)

0.6
0.7
0.6
0.4
0
0.3
0.4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

17
17
18
18
19
19
19
18
18
17
16
13
11
9
8
8
8
8
8
8
7
7
7
6

Chance of Frost

Temperature (°C)

17
17
18
18
18
19
18
18
18
18
18
18
17
16
16
15
15
15
15
15
15
15
15
15

Feels Like (°C)

13
13
15
16
15
16
16
15
16
16
17
17
18
17
16
16
16
14
14
14
14
14
14
15

Dew Point (°C)

15
15
16
14
12
13
13
14
13
12
13
14
14
14
14
14
14
14
14
14
14
14
14
14

Relative Humidity (%)

87
87
88
79
67
68
72
76
71
68
73
77
82
86
89
90
90
90
90
92
93
93
93
92

Pressure (mb)

1009
1009
1009
1009
1009
1010
1011
1012
1012
1012
1013
1013
1014
1015
1015
1016
1016
1016
1016
1016
1016
1017
1017
1017

Ozone (du)

334
333
329
330
332
332
333
333
332
330
326
326
320
315
314
313
311
310
311
311
312
310
309
308

Tuesday 1

Waning Gibbous 74%

21:26

12:13

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

Sun - Rise: 06:53, Set: 20:26, Transit: 13:39. Moon - Rise: 21:26, Set: 12:13. Civil Dark: 21:02 - 06:18. Nautical Dark: 21:45 - 05:35. Astro Dark: 22:33 - 04:47

Total Clouds (% Sky Obscured)

82
74
69
68
65
61
57
56
51
45
30
4
3
3
4
3
5
22
33
52
64
94
83
97

Low Clouds (% Sky Obscured)

30
28
51
50
24
41
26
53
10
4
0
0
0
0
0
0
0
12
23
42
36
35
30
21

Medium Clouds (% Sky Obscured)

17
7
8
24
24
61
57
54
51
45
30
4
3
3
4
0
0
1
2
3
7
14
20
24

High Clouds (% Sky Obscured)

59
40
40
35
30
40
40
0
19
30
24
0
0
0
2
2
4
5
2
1
31
73
83
90

ISS Passover

Visibility (miles)

9
9
7
5
6
6
8
8
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
Very Light Rain
Very Light Rain
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

19
35
45
45
42
35
34
12
20
6
2
0
1
0
1
1
1
1
1
2
1
1
2
5

Precipitation Amount (mm)

0
0
0.3
0.2
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
11
11
11
11
11
11
10
8
6
4
3
3
4
4
5
5
5
5
5
6
6

Chance of Frost

Temperature (°C)

16
18
19
20
20
21
21
21
21
20
19
17
16
15
14
13
13
12
12
12
12
13
13
13

Feels Like (°C)

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

Dew Point (°C)

14
14
15
15
15
14
13
12
12
12
13
14
14
13
12
11
11
11
11
11
11
11
12
12

Relative Humidity (%)

86
79
75
75
70
65
61
57
57
60
68
78
86
87
89
87
86
89
92
92
92
92
92
90

Pressure (mb)

1018
1018
1018
1019
1019
1019
1019
1018
1018
1019
1019
1019
1019
1019
1020
1019
1019
1019
1019
1018
1018
1018
1018
1018

Ozone (du)

307
308
308
309
309
311
313
315
316
316
316
315
316
317
316
316
317
317
316
316
317
317
319
319

Wednesday 2

Waning Gibbous 63%

21:48

13:40

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
07 Bad
08 Bad

Sun - Rise: 06:55, Set: 20:24, Transit: 13:39. Moon - Rise: 21:48, Set: 13:40. Civil Dark: 20:59 - 06:20. Nautical Dark: 21:42 - 05:37. Astro Dark: 22:30 - 04:50

Total Clouds (% Sky Obscured)

86
86
94
97
100
99
98
97
98
99
100
100
100
100
93
89
81
74
67
60
76
83
92
92

Low Clouds (% Sky Obscured)

12
4
11
17
38
34
30
25
43
62
80
79
78
77
74
69
74
70
62
56
64
70
74
63

Medium Clouds (% Sky Obscured)

23
25
22
24
30
35
33
34
59
72
87
91
93
94
89
82
75
63
52
35
25
15
4
3

High Clouds (% Sky Obscured)

76
67
79
90
99
73
53
30
40
73
100
94
88
74
45
27
8
23
38
53
67
82
92
78

ISS Passover

Visibility (miles)

9
9
9
9
9
6
7
8
9
8
7
6
7
8
9
9
9
9
9
8
8
8
8
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
None
None
None
Very Light Rain
Very Light Rain
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
Very Light Rain
Light Rain
Light Rain

Precipitation Probability (%)

1
12
2
17
47
58
62
62
57
58
59
56
50
39
38
42
41
38
38
39
51
58
62
62

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

7
9
10
11
13
14
13
12
11
12
13
15
13
12
12
10
9
9
9
9
10
9
9
9

Chance of Frost

Temperature (°C)

15
17
19
19
20
20
20
19
18
18
17
17
16
16
16
16
16
16
16
16
16
16
16
15

Feels Like (°C)

14
16
18
17
18
18
17
17
16
17
18
19
14
14
14
14
14
14
13
13
12
13
13
13

Dew Point (°C)

12
12
12
11
11
13
12
11
9
11
13
15
14
14
13
13
14
14
14
15
15
15
14
14

Relative Humidity (%)

80
72
64
56
54
65
61
58
54
64
74
87
86
85
82
85
86
87
89
90
90
92
92
93

Pressure (mb)

1018
1018
1018
1017
1017
1016
1016
1015
1015
1015
1014
1014
1014
1013
1013
1013
1013
1013
1013
1013
1013
1013
1013
1014

Ozone (du)

318
317
318
317
316
314
315
317
318
316
314
312
313
313
313
312
311
309
310
310
310
310
310
309

Thursday 3

Waning Gibbous 51%

22:19

15:07

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 OK
05 Bad
06 Bad
07 Bad
08 Bad

Sun - Rise: 06:56, Set: 20:22, Transit: 13:38. Moon - Rise: 22:19, Set: 15:07. Civil Dark: 20:57 - 06:22. Nautical Dark: 21:40 - 05:39. Astro Dark: 22:27 - 04:52

Total Clouds (% Sky Obscured)

92
92
93
94
95
96
96
96
82
69
55
71
83
94
91
88
84
65
46
27
54
76
98
98

Low Clouds (% Sky Obscured)

52
42
35
28
21
16
13
10
9
9
12
31
48
66
57
45
18
9
8
8
10
16
18
25

Medium Clouds (% Sky Obscured)

2
1
13
25
38
51
63
75
62
49
35
45
56
67
53
40
31
28
25
24
26
27
29
44

High Clouds (% Sky Obscured)

59
40
60
79
82
83
85
88
80
66
50
52
56
66
72
68
69
51
26
0
32
57
80
61

ISS Passover

Visibility (miles)

8
8
8
8
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

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

Precipitation Probability (%)

58
48
36
30
18
13
10
10
15
20
27
46
59
71
77
75
68
62
46
8
15
18
19
33

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

16
17
18
19
20
20
20
20
20
20
19
18
18
16
16
15
15
15
16
16
17
18
18
19

Feels Like (°C)

13
15
16
16
17
17
18
17
16
16
16
16
15
14
15
15
14
15
13
15
17
17
17
17

Dew Point (°C)

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

Relative Humidity (%)

89
86
81
70
59
50
53
56
58
59
62
64
72
79
87
87
87
86
86
85
83
83
83
84

Pressure (mb)

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

Ozone (du)

310
311
312
312
312
312
313
315
316
318
319
321
323
325
327
330
333
336
333
330
328
328
328
328

Friday 4

Third Quarter 39%

23:06

16:28

Sun - Rise: 06:58, Set: 20:19, Transit: 13:38. Moon - Rise: 23:06, Set: 16:28. Civil Dark: 20:54 - 06:23. Nautical Dark: 21:37 - 05:41. Astro Dark: 22:24 - 04:54

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 Utrecht, Gemeente Utrecht, Netherlands (52.09,5.12)

Generated: 29/08/26 09:03:23. Forecast: 29/08/26 to 04/09/26. Timezone: UTC+2.00