Clear Outside v1.0 - International Weather Forecasts For Astronomers

Thursday 18

Waning Crescent 6%

04:15

18:53

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

Sun - Rise: 07:21, Set: 19:46, Transit: 13:33. Moon - Rise: 04:15, Set: 18:53. Civil Dark: 20:20 - 06:48. Nautical Dark: 21:00 - 06:07. Astro Dark: 21:43 - 05:25

Total Clouds (% Sky Obscured)

98
93
86
75
76
100
80
95
97
61
40
46
48
35
39
39
46
38
27
8
15
23
19
74

Low Clouds (% Sky Obscured)

78
72
78
63
44
33
0
0
0
0
9
19
22
19
17
10
33
38
27
5
0
0
0
0

Medium Clouds (% Sky Obscured)

22
28
27
36
28
2
0
0
0
2
0
7
3
6
3
3
2
2
2
0
0
0
0
0

High Clouds (% Sky Obscured)

0
0
0
0
48
94
76
95
97
61
39
28
28
14
29
39
23
2
0
3
9
13
15
74

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)

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

Chance of Frost

Temperature (°C)

20
21
21
21
20
19
18
17
17
16
16
16
15
15
15
15
14
15
16
18
21
23
24
25

Feels Like (°C)

18
19
19
19
20
19
18
17
17
15
15
15
14
15
15
14
13
14
17
19
22
22
23
24

Dew Point (°C)

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

Relative Humidity (%)

75
68
68
66
69
72
78
81
83
85
87
92
92
93
93
92
92
93
85
73
66
59
50
45

Pressure (mb)

1020
1020
1020
1020
1021
1021
1022
1022
1022
1022
1022
1022
1022
1022
1022
1022
1022
1022
1022
1022
1022
1022
1021
1021

Ozone (du)

256
256
255
255
256
257
257
258
257
257
256
255
255
256
257
257
256
256
256
257
257
256
255
254

Friday 19

Waning Crescent 2%

05:34

19:06

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

Sun - Rise: 07:23, Set: 19:44, Transit: 13:32. Moon - Rise: 05:34, Set: 19:06. Civil Dark: 20:18 - 06:49. Nautical Dark: 20:58 - 06:09. Astro Dark: 21:40 - 05:27

Total Clouds (% Sky Obscured)

83
97
100
100
97
84
74
30
25
18
58
46
82
89
60
100
97
79
80
100
100
100
100
16

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
48
27
28
16
2
47
34
43
64
60
78
88
79
37
65
99
84
55
16

High Clouds (% Sky Obscured)

83
97
100
100
97
78
18
5
3
6
1
17
82
71
5
100
81
26
62
99
100
100
97
16

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
1
0
0
6
2
1
0
0
0
10

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)

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

Chance of Frost

Temperature (°C)

26
26
26
25
23
21
20
19
19
18
18
17
17
17
18
17
17
17
19
21
23
23
25
25

Feels Like (°C)

25
26
25
24
22
20
19
18
17
17
16
17
17
17
16
15
16
16
18
20
21
22
22
23

Dew Point (°C)

12
11
12
14
14
13
12
11
10
11
11
11
11
11
11
11
12
12
13
13
12
13
12
12

Relative Humidity (%)

41
38
41
49
57
60
59
59
56
61
64
65
67
68
64
67
72
70
68
58
51
50
44
42

Pressure (mb)

1020
1019
1019
1018
1018
1018
1017
1017
1017
1017
1016
1016
1015
1015
1015
1014
1014
1014
1013
1014
1013
1013
1012
1012

Ozone (du)

254
255
256
255
255
255
255
254
255
255
254
253
253
253
253
253
252
251
251
251
250
251
251
251

Saturday 20

Waning Crescent 0%

06:50

19:17

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
13 Bad
14 Bad

Sun - Rise: 07:25, Set: 19:41, Transit: 13:32. Moon - Rise: 06:50, Set: 19:17. Civil Dark: 20:15 - 06:51. Nautical Dark: 20:55 - 06:11. Astro Dark: 21:37 - 05:29

Total Clouds (% Sky Obscured)

55
100
90
65
100
100
100
100
100
100
100
95
100
100
100
100
100
100
100
100
99
98
97
98

Low Clouds (% Sky Obscured)

0
0
1
0
27
43
72
47
56
77
90
71
40
43
14
40
18
29
41
52
54
57
60
50

Medium Clouds (% Sky Obscured)

55
67
65
65
54
45
30
52
39
57
56
89
100
100
77
71
50
57
62
53
51
43
77
96

High Clouds (% Sky Obscured)

13
100
71
26
100
100
100
100
99
100
24
25
50
68
100
100
100
100
100
100
80
77
75
81

ISS Passover

Visibility (miles)

9
9
9
9
8
9
9
9
9
9
9
8
2
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
Light Rain
Very Light Rain
None
None
Very Light Rain
None
None
None
None
Light Rain
Light Rain
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

8
55
92
81
46
29
54
33
10
34
45
95
76
33
14
2
1
2
2
1
1
2
0
1

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

26
26
24
21
21
20
20
19
19
18
19
19
18
17
17
15
14
14
15
15
16
17
17
18

Feels Like (°C)

24
24
23
21
21
22
21
19
19
18
18
18
17
17
16
13
12
11
12
12
13
14
14
14

Dew Point (°C)

15
15
19
18
20
20
19
18
18
17
17
17
18
17
16
13
12
12
12
12
11
10
9
8

Relative Humidity (%)

51
49
72
83
92
95
93
95
96
93
92
91
96
95
96
86
89
89
86
80
73
64
56
53

Pressure (mb)

1011
1011
1010
1010
1010
1010
1010
1010
1010
1009
1009
1009
1009
1009
1009
1010
1010
1011
1011
1011
1012
1012
1012
1012

Ozone (du)

251
250
252
252
253
254
255
256
256
258
257
258
260
261
260
261
263
265
267
268
269
270
270
272

Sunday 21

New Moon 1%

08:03

19:26

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 OK
04 OK
05 OK
06 OK
07 OK
08 OK
09 OK
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad

Sun - Rise: 07:26, Set: 19:39, Transit: 13:32. Moon - Rise: 08:03, Set: 19:26. Civil Dark: 20:13 - 06:53. Nautical Dark: 20:53 - 06:13. Astro Dark: 21:35 - 05:31

Total Clouds (% Sky Obscured)

99
100
100
100
100
100
100
100
87
73
61
44
31
15
22
22
23
33
43
52
82
90
99
72

Low Clouds (% Sky Obscured)

47
41
26
18
6
20
26
34
30
26
22
15
7
0
9
18
23
33
43
52
49
40
33
35

Medium Clouds (% Sky Obscured)

75
59
100
100
100
89
77
62
62
23
28
34
9
0
0
0
0
0
0
2
45
53
61
38

High Clouds (% Sky Obscured)

87
75
73
41
100
100
100
100
67
33
0
0
0
0
0
0
0
0
0
0
32
63
99
67

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
3
2

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
Light Rain
Light Rain
Light Rain

Precipitation Probability (%)

1
0
2
9
23
38
14
7
6
8
4
9
8
3
3
3
2
3
8
14
30
60
92
95

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.4
0.9
1

Wind Speed/Direction (mph)

14
13
11
9
8
10
8
8
6
7
6
6
5
5
5
5
5
5
5
6
7
7
7
7

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

51
49
50
53
61
74
86
87
89
89
89
93
93
93
95
93
95
93
84
74
66
60
65
71

Pressure (mb)

1012
1012
1011
1012
1012
1012
1013
1013
1013
1014
1014
1014
1014
1014
1015
1015
1015
1016
1017
1017
1017
1017
1017
1018

Ozone (du)

272
272
274
276
277
278
278
279
281
284
287
287
287
288
289
289
292
292
293
294
295
296
300
301

Monday 22

Waxing Crescent 3%

09:16

19:35

15 Bad
16 Bad
17 Bad
18 Bad
19 OK
20 OK
21 OK
22 OK
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

Sun - Rise: 07:28, Set: 19:37, Transit: 13:31. Moon - Rise: 09:16, Set: 19:35. Civil Dark: 20:10 - 06:54. Nautical Dark: 20:50 - 06:14. Astro Dark: 21:32 - 05:33

Total Clouds (% Sky Obscured)

69
51
39
23
15
20
26
40
51
64
75
76
78
79
75
72
69
76
84
83
84
87
93
93

Low Clouds (% Sky Obscured)

49
39
28
19
6
19
26
40
32
25
13
14
9
18
9
8
4
0
0
0
0
0
0
14

Medium Clouds (% Sky Obscured)

45
23
29
23
15
20
26
14
47
30
38
39
32
21
13
12
7
4
4
9
9
29
35
45

High Clouds (% Sky Obscured)

33
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
33
67
93
93

ISS Passover

Visibility (miles)

6
3
3
7
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

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

Precipitation Probability (%)

86
88
67
33
13
8
9
12
11
4
2
8
7
4
8
7
3
13
18
22
39
51
61
74

Precipitation Amount (mm)

0.6
0.8
0.4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.2
0.5

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

72
82
85
86
89
89
87
86
84
84
84
84
84
84
84
83
80
78
71
63
57
61
64
69

Pressure (mb)

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

Ozone (du)

302
303
304
305
305
306
307
309
310
308
306
307
307
307
306
307
307
307
307
307
307
307
308
308

Tuesday 23

Waxing Crescent 2%

10:30

19:45

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
13 Bad
14 Bad

Sun - Rise: 07:30, Set: 19:34, Transit: 13:31. Moon - Rise: 10:30, Set: 19:45. Civil Dark: 20:08 - 06:56. Nautical Dark: 20:48 - 06:16. Astro Dark: 21:29 - 05:35

Total Clouds (% Sky Obscured)

94
95
92
89
89
86
85
85
87
87
82
72
67
62
62
53
49
53
66
69
70
76
74
71

Low Clouds (% Sky Obscured)

23
33
30
31
32
21
14
6
14
24
31
41
49
56
53
53
49
53
58
56
57
57
54
52

Medium Clouds (% Sky Obscured)

45
45
45
45
45
54
49
48
44
35
35
35
35
40
40
40
40
45
45
50
50
55
60
65

High Clouds (% Sky Obscured)

94
95
90
85
80
50
23
0
24
48
71
71
67
62
62
53
49
53
66
69
70
76
74
71

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

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

Precipitation Probability (%)

83
90
84
79
76
81
82
77
65
48
15
23
27
27
32
31
30
30
30
31
46
52
54
62

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

8
8
7
6
5
3
5
6
8
8
8
7
7
8
8
8
9
10
10
10
10
9
8
7

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

65
64
62
59
58
55
62
68
74
78
84
88
88
88
88
87
88
87
80
72
66
57
49
42

Pressure (mb)

1019
1019
1019
1019
1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
1021
1021
1021
1021
1022
1022
1022
1022
1022
1022

Ozone (du)

308
308
308
307
306
305
306
307
308
308
308
308
308
307
307
306
305
304
304
304
304
303
303
302

Wednesday 24

Waxing Crescent 7%

11:44

19:57

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

Sun - Rise: 07:31, Set: 19:32, Transit: 13:30. Moon - Rise: 11:44, Set: 19:57. Civil Dark: 20:06 - 06:58. Nautical Dark: 20:45 - 06:18. Astro Dark: 21:27 - 05:37

Total Clouds (% Sky Obscured)

71
71
75
84
90
90
88
91
90
90
85
75
71
80
81
81
86

Low Clouds (% Sky Obscured)

53
58
66
71
80
76
80
82
84
81
78
73
69
68
64
65
69

Medium Clouds (% Sky Obscured)

55
55
55
45
35
25
25
25
30
35
40
45
40
40
40
35
35

High Clouds (% Sky Obscured)

71
71
75
64
53
53
53
55
45
30
20
14
9
5
5
0
0

ISS Passover

Visibility (miles)

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

Precipitation Type

Very Light Rain
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

Precipitation Probability (%)

69
76
64
62
62
63
63
51
46
43
39
45
47
49
53
53
47

Precipitation Amount (mm)

0.3
0.4
0.3
0.3
0.3
0.3
0.3
0.3
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

15
15
14
14
14
15
9
10
11
10
11
10
9
10
9
9
10

Dew Point (°C)

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

Relative Humidity (%)

46
50
54
60
67
76
77
80
83
82
82
82
82
84
85
85
84

Pressure (mb)

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

Ozone (du)

302
301
301
301
300
300
300
299
299
298
297
296
295
294
293
293
293

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

Generated: 18/09/25 15:44:34. Forecast: 18/09/25 to 24/09/25. Timezone: UTC+2.00