Clear Outside v1.0 - International Weather Forecasts For Astronomers

Monday 31

Waning Gibbous 83%

21:10

12:13

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

Sun - Rise: 06:52, Set: 20:29, Transit: 13:39. Moon - Rise: 21:10, Set: 12:13. Civil Dark: 21:04 - 06:16. Nautical Dark: 21:48 - 05:33. Astro Dark: 22:36 - 04:45

Total Clouds (% Sky Obscured)

89
81
85
100
45
20
12
1
5
16
5
52
95
90
76
91
91
51
63
60
60
43
42
54

Low Clouds (% Sky Obscured)

49
51
70
71
45
20
12
1
5
14
0
17
27
22
19
33
30
22
8
27
31
26
24
37

Medium Clouds (% Sky Obscured)

17
22
11
6
2
0
0
0
0
0
0
8
2
18
58
82
83
32
37
36
30
16
13
12

High Clouds (% Sky Obscured)

5
18
34
62
6
0
0
0
0
2
4
35
88
81
69
8
48
8
34
2
2
0
2
2

ISS Passover

Visibility (miles)

6
7
7
8
8
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

Light Rain
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 (%)

95
64
40
39
33
21
4
3
3
3
3
4
2
3
15
0
0
0
0
0
0
0
0
0

Precipitation Amount (mm)

0.7
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)

19
20
19
17
16
15
13
11
8
8
8
8
7
7
7
7
6
6
7
7
8
10
11
11

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

16
14
13
14
14
14
14
13
13
13
13
14
14
13
13
14
13
13
13
12
12
10
9
9

Relative Humidity (%)

83
72
71
72
76
73
73
74
77
81
83
87
90
87
86
90
89
89
90
86
74
60
53
50

Pressure (mb)

1009
1009
1010
1011
1011
1012
1012
1013
1014
1015
1015
1016
1016
1016
1016
1017
1017
1017
1018
1018
1019
1019
1020
1020

Ozone (du)

339
339
337
335
333
333
330
327
325
322
320
319
316
315
316
317
317
317
316
315
314
313
313
312

Tuesday 1

Waning Gibbous 74%

21:26

No Set

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

Sun - Rise: 06:53, Set: 20:26, Transit: 13:39. Moon - Rise: 21:26, Set: No Set. Civil Dark: 21:02 - 06:18. Nautical Dark: 21:45 - 05:35. Astro Dark: 22:33 - 04:47

Total Clouds (% Sky Obscured)

48
50
64
81
36
55
7
11
4
48
100
100
100
100
100
78
74
40
56
70
66
61
72
91

Low Clouds (% Sky Obscured)

38
34
38
31
30
22
6
0
0
0
0
0
0
5
3
3
3
14
23
18
37
21
23
21

Medium Clouds (% Sky Obscured)

6
6
6
9
4
4
4
11
4
19
4
56
15
40
93
78
74
40
56
67
7
2
4
8

High Clouds (% Sky Obscured)

3
8
25
81
4
25
0
1
2
42
100
100
100
100
100
21
15
15
15
17
4
54
46
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
1
1
1
1
2
2
1
2
3
5
9
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)

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

Chance of Frost

Temperature (°C)

20
20
20
20
20
20
19
17
15
14
13
13
13
12
13
13
13
13
13
13
15
17
19
20

Feels Like (°C)

18
18
18
18
19
18
17
18
16
15
14
11
11
11
11
11
11
11
11
11
14
18
19
18

Dew Point (°C)

9
9
8
9
9
9
11
11
11
10
10
9
9
9
9
9
9
9
9
10
12
12
11
10

Relative Humidity (%)

48
47
45
46
48
50
58
68
74
76
78
77
76
77
77
76
76
77
79
82
79
68
57
52

Pressure (mb)

1020
1020
1020
1020
1020
1020
1020
1020
1021
1021
1020
1021
1020
1020
1020
1020
1020
1019
1020
1020
1020
1020
1021
1021

Ozone (du)

312
312
313
313
315
317
318
316
315
315
315
316
317
317
317
317
319
324
325
327
324
320
317
314

Wednesday 2

Waning Gibbous 63%

21:48

13:40

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
09 Bad
10 Bad
11 Bad
12 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)

99
100
100
100
100
88
82
100
100
100
99
94
99
90
72
92
99
99
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

17
19
21
14
9
25
20
8
15
10
68
59
77
67
58
68
81
82
80
83
84
86
82
78

Medium Clouds (% Sky Obscured)

9
7
85
37
38
57
82
85
88
99
90
94
59
29
13
13
27
32
32
37
39
38
38
48

High Clouds (% Sky Obscured)

99
100
100
100
23
15
27
95
81
76
66
63
91
38
15
55
95
92
100
86
83
82
99
98

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 (%)

4
1
0
0
5
2
1
3
3
3
3
2
3
2
4
6
5
6
9
11
11
18
21
21

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)

13
13
13
13
12
10
7
6
7
7
9
10
11
12
12
12
13
13
13
13
14
14
15
15

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

49
48
49
50
51
53
59
69
72
71
74
77
74
76
86
88
89
85
85
85
85
82
76
79

Pressure (mb)

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

Ozone (du)

312
311
309
306
304
303
301
301
299
300
301
301
301
300
298
296
294
294
291
290
290
288
287
287

Thursday 3

Waning Gibbous 51%

22:19

15:07

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
09 Bad
10 Bad
11 Bad
12 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)

99
98
97
96
97
99
100
99
99
98
93
84
84
87
91
94
95
96
96
96
96
96
95
96

Low Clouds (% Sky Obscured)

76
74
74
74
79
81
96
97
97
97
90
75
81
83
85
87
87
87
88
87
87
86
45
48

Medium Clouds (% Sky Obscured)

82
88
92
30
33
35
36
48
49
53
26
42
18
19
21
32
53
33
28
81
94
95
95
95

High Clouds (% Sky Obscured)

97
79
67
68
68
72
53
61
42
5
4
5
4
33
41
43
41
29
35
49
53
67
55
51

ISS Passover

Visibility (miles)

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

Precipitation Probability (%)

27
57
42
66
41
45
63
79
71
65
71
93
54
55
80
65
64
33
20
56
59
46
21
27

Precipitation Amount (mm)

0
0.4
0
0.4
0
0
0
0.5
0.3
0
0.3
0.9
0.3
0
0.5
0.3
0.3
0
0
0.2
0.2
0.2
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

21
21
21
21
21
21
20
20
20
20
20
20
20
20
19
19
18
18
18
18
18
18
18
19

Feels Like (°C)

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

Dew Point (°C)

18
19
20
20
20
20
19
19
19
19
20
19
19
19
18
18
18
17
17
17
17
17
17
17

Relative Humidity (%)

84
88
92
91
91
92
91
93
96
96
96
95
96
96
95
95
96
95
96
95
90
92
93
85

Pressure (mb)

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

Ozone (du)

286
286
287
287
286
285
283
281
282
282
282
282
282
282
284
285
285
286
289
291
291
294
298
299

Friday 4

Third Quarter 39%

23:06

16:28

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
09 Bad
10 Bad
11 Bad
12 Bad

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)

95
97
98
100
100
100
100
100
100
91
76
75
70
54
46
40
43
46
49
53
55
53
62
70

Low Clouds (% Sky Obscured)

64
61
83
87
75
64
53
51
49
45
30
13
0
10
18
24
25
26
26
33
39
46
56
65

Medium Clouds (% Sky Obscured)

95
97
98
69
15
20
20
23
21
19
12
6
0
0
0
1
1
1
1
1
0
0
0
0

High Clouds (% Sky Obscured)

43
54
61
70
77
89
100
100
100
91
76
75
70
54
30
9
32
46
49
44
30
12
0
1

ISS Passover

Visibility (miles)

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

Precipitation Probability (%)

40
61
66
78
81
70
62
56
47
26
13
6
1
4
5
3
15
21
25
28
29
29
29
29

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

18
19
19
19
19
17
15
13
11
10
8
8
8
8
8
8
8
8
8
8
10
13
15
15

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

82
73
82
85
88
88
86
88
90
92
92
90
87
87
86
86
86
87
87
90
82
74
68
68

Pressure (mb)

1013
1013
1013
1013
1013
1013
1013
1013
1013
1014
1014
1014
1014
1014
1015
1015
1015
1016
1017
1017
1018
1018
1019
1020

Ozone (du)

302
304
306
310
311
312
313
318
323
327
328
330
331
334
338
343
347
345
343
341
338
334
331
329

Saturday 5

Waning Crescent 28%

00:12

17:33

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

Sun - Rise: 07:00, Set: 20:17, Transit: 13:38. Moon - Rise: 00:12, Set: 17:33. Civil Dark: 20:52 - 06:25. Nautical Dark: 21:34 - 05:43. Astro Dark: 22:21 - 04:57

Total Clouds (% Sky Obscured)

80
78
76
74
58
42
27
20
13
5
14
22
31
34
34
33
42
48
55
54
54
63
66
66

Low Clouds (% Sky Obscured)

73
73
71
70
56
40
21
15
9
3
2
1
0
0
0
0
0
1
2
1
1
0
0
0

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
1
2
3
6
9
12
10
8
6
6
7

High Clouds (% Sky Obscured)

1
1
1
0
1
2
3
4
4
5
14
22
31
28
23
24
26
35
41
46
54
63
66
63

ISS Passover

Visibility (miles)

9
8
8
8
7
8
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 (%)

31
32
33
36
29
21
13
14
14
3
9
8
0
0
1
0
0
0
0
1
1
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)

15
15
15
14
14
12
10
8
7
6
4
4
5
5
5
5
5
4
4
4
4
4
4
5

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

16
16
15
15
13
14
14
14
13
13
13
12
12
12
9
9
9
9
9
9
11
12
14
14

Dew Point (°C)

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

Relative Humidity (%)

68
68
67
66
65
65
67
68
71
76
81
81
81
83
83
81
83
81
80
80
71
64
58
54

Pressure (mb)

1020
1021
1022
1022
1023
1023
1024
1024
1025
1025
1025
1026
1026
1026
1026
1026
1026
1026
1027
1027
1027
1027
1027
1027

Ozone (du)

326
323
321
319
317
316
315
314
313
312
311
310
310
309
308
307
306
304
303
302
301
300
299
297

Sunday 6

Waning Crescent 18%

01:34

18:20

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

Sun - Rise: 07:01, Set: 20:15, Transit: 13:37. Moon - Rise: 01:34, Set: 18:20. Civil Dark: 20:49 - 06:27. Nautical Dark: 21:32 - 05:45. Astro Dark: 22:18 - 04:59

Total Clouds (% Sky Obscured)

66
56
47
38
40
38
35
35
40
35
36
32
38
34
30
26
36
49
69

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

9
9
9
10
19
28
35
35
38
35
36
32
35
34
28
24
27
29
32

High Clouds (% Sky Obscured)

58
44
29
14
11
18
20
35
40
35
36
32
38
34
28
6
21
41
58

ISS Passover

Visibility (miles)

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

Precipitation Type

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
4
2
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

Wind Speed/Direction (mph)

5
6
6
6
6
5
4
4
3
1
3
3
4
5
5
5
6
6
5

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

15
16
21
20
19
21
21
22
18
18
19
18
18
17
16
15
14
14
14

Dew Point (°C)

9
9
9
9
9
10
10
11
11
10
10
10
10
10
10
9
9
8
8

Relative Humidity (%)

51
48
47
46
46
52
57
65
67
68
70
72
73
73
71
71
71
70
70

Pressure (mb)

1027
1026
1026
1025
1025
1025
1025
1024
1024
1024
1024
1024
1024
1023
1023
1023
1022
1022
1022

Ozone (du)

296
295
293
291
290
290
290
290
290
290
290
290
291
291
291
291
291
290
290

Forecast for Utrecht, Gemeente Utrecht, Netherlands (52.09,5.12)

Generated: 31/08/26 13:12:52. Forecast: 31/08/26 to 06/09/26. Timezone: UTC+2.00