Clear Outside v1.0 - International Weather Forecasts For Astronomers

Friday 21

Waxing Crescent 5%

10:59

17:21

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

Sun - Rise: 08:12, Set: 16:38, Transit: 12:25. Moon - Rise: 10:59, Set: 17:21. Civil Dark: 17:17 - 07:34. Nautical Dark: 17:59 - 06:52. Astro Dark: 18:39 - 06:11

Total Clouds (% Sky Obscured)

30
29
27
20
65
28
7
31
94
100
100
100
100
100
100
100
100
95
41
71
69
73
75
78

Low Clouds (% Sky Obscured)

26
22
12
6
7
6
0
0
6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

0
2
2
20
46
18
5
21
12
69
36
50
76
100
100
100
98
88
41
71
69
73
75
78

High Clouds (% Sky Obscured)

1
2
2
1
0
0
0
2
89
98
100
100
100
99
100
100
100
87
12
10
10
12
10
12

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
1
2
2
1
1
1
1
1
1
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

78
78
78
78
80
80
81
83
86
86
87
87
86
84
80
74
69
63
58
56
57
58
59
61

Pressure (mb)

1026
1027
1027
1027
1027
1027
1027
1027
1027
1026
1026
1026
1025
1025
1025
1025
1025
1024
1023
1022
1021
1020
1019
1019

Ozone (du)

298
299
298
294
288
282
280
275
274
273
272
273
276
274
268
263
262
265
269
274
278
281
280
280

Saturday 22

Waxing Crescent 10%

11:48

18:19

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
15 Bad
16 Bad
17 Bad
18 Bad

Sun - Rise: 08:14, Set: 16:37, Transit: 12:26. Moon - Rise: 11:48, Set: 18:19. Civil Dark: 17:16 - 07:35. Nautical Dark: 17:58 - 06:53. Astro Dark: 18:38 - 06:13

Total Clouds (% Sky Obscured)

90
100
100
100
100
97
99
97
100
100
100
100
100
100
100
100
96
100
100
100
100
100
100
85

Low Clouds (% Sky Obscured)

4
5
23
62
53
44
85
94
96
91
96
92
89
86
90
100
93
86
92
83
100
100
100
80

Medium Clouds (% Sky Obscured)

86
100
100
100
97
81
98
97
99
100
100
100
100
100
95
67
87
100
96
100
100
83
25
30

High Clouds (% Sky Obscured)

58
100
97
75
86
69
62
17
15
100
17
100
100
100
5
5
0
90
1
7
10
10
4
5

ISS Passover

Visibility (miles)

9
9
9
9
9
3
9
6
1
0
0
0
0
0
0
0
0
0
1
9
9
0
0
0

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

Precipitation Probability (%)

0
6
12
19
24
19
14
46
75
83
95
95
94
74
53
42
22
14
5
50
95
95
95
79

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0.4
0.5
0.8
0.9
0.6
0.4
0.2
0.1
0
0
0
0
1.5
3.1
0.8
0.4

Wind Speed/Direction (mph)

14
14
14
14
15
15
15
15
16
16
16
17
17
17
16
16
15
14
13
13
13
12
11
7

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

64
65
65
66
68
76
69
70
89
89
91
89
87
94
96
94
96
96
96
96
96
100
100
100

Pressure (mb)

1018
1018
1017
1016
1015
1014
1014
1013
1012
1011
1010
1009
1008
1007
1006
1005
1005
1003
1002
1000
998
997
996
995

Ozone (du)

281
282
278
274
278
282
279
275
275
274
272
271
271
271
272
272
271
271
274
276
278
280
284
285

Sunday 23

Waxing Crescent 16%

12:25

No Set

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
15 Bad
16 Bad
17 Bad
18 Bad

Sun - Rise: 08:16, Set: 16:36, Transit: 12:26. Moon - Rise: 12:25, Set: No Set. Civil Dark: 17:15 - 07:37. Nautical Dark: 17:57 - 06:54. Astro Dark: 18:38 - 06:14

Total Clouds (% Sky Obscured)

77
84
98
95
84
90
89
89
83
81
74
70
81
95
100
96
100
100
100
100
99
100
100
100

Low Clouds (% Sky Obscured)

77
72
85
86
73
83
82
89
83
78
65
66
77
89
81
68
82
79
85
91
99
99
100
100

Medium Clouds (% Sky Obscured)

25
55
85
72
61
59
41
25
25
30
46
40
52
63
100
93
69
90
98
99
98
95
98
100

High Clouds (% Sky Obscured)

5
5
10
3
0
1
3
3
4
10
10
11
14
46
27
8
3
1
0
1
1
1
2
2

ISS Passover

Visibility (miles)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
3
6
6
6
7
7
6
7
8
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

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

Precipitation Probability (%)

86
78
61
67
72
53
44
43
44
32
30
36
47
39
27
25
29
52
42
52
57
49
39
29

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

2
2
3
3
4
4
4
4
4
4
4
4
4
4
4
5
5
6
6
6
6
6
6
6

Feels Like (°C)

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

Dew Point (°C)

2
2
3
3
4
4
4
4
4
4
4
4
4
4
4
5
5
6
6
6
6
6
6
5

Relative Humidity (%)

100
100
100
100
100
100
100
100
100
100
100
98
100
100
100
100
98
98
96
96
96
96
96
96

Pressure (mb)

995
995
995
995
995
994
994
994
994
994
994
993
993
993
994
994
994
993
993
993
993
994
994
995

Ozone (du)

286
287
287
287
288
288
290
292
294
295
294
293
294
295
296
298
301
305
307
305
303
302
302
303

Monday 24

Waxing Crescent 25%

12:51

19:28

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
15 Bad
16 Bad
17 Bad
18 Bad

Sun - Rise: 08:17, Set: 16:35, Transit: 12:26. Moon - Rise: 12:51, Set: 19:28. Civil Dark: 17:14 - 07:38. Nautical Dark: 17:57 - 06:56. Astro Dark: 18:37 - 06:15

Total Clouds (% Sky Obscured)

93
84
74
74
70
70
76
77
75
61
44
33
36
42
45
50
55
60
70
77
85
77
68
61

Low Clouds (% Sky Obscured)

81
68
56
48
47
50
54
58
60
48
37
25
29
32
35
41
47
53
53
54
56
55
54
50

Medium Clouds (% Sky Obscured)

85
70
50
57
53
51
67
64
30
37
42
29
32
19
6
5
3
4
16
29
39
28
13
2

High Clouds (% Sky Obscured)

4
4
4
2
8
14
23
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

ISS Passover

Visibility (miles)

6
6
6
6
6
6
6
0
0
0
0
0
0
0
0
0
0
6
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 (%)

23
18
5
5
5
3
8
14
16
22
26
21
10
9
2
17
8
13
17
19
18
15
11
2

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)

7
7
6
6
6
5
4
5
6
8
9
9
9
8
8
8
8
8
8
8
8
7
7
7

Chance of Frost

Temperature (°C)

6
5
5
4
4
4
3
3
3
3
3
3
2
2
3
3
3
4
5
5
5
4
4
3

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

96
94
94
93
91
93
94
96
98
98
98
96
98
96
98
96
96
93
93
93
93
93
91
91

Pressure (mb)

996
996
997
998
999
999
1000
1001
1002
1003
1003
1004
1005
1006
1007
1008
1009
1009
1010
1010
1011
1012
1013
1013

Ozone (du)

304
303
303
304
303
308
311
311
311
312
314
314
309
303
299
299
301
302
303
305
308
309
310
313

Tuesday 25

Waxing Crescent 34%

13:11

20:44

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

Sun - Rise: 08:19, Set: 16:34, Transit: 12:27. Moon - Rise: 13:11, Set: 20:44. Civil Dark: 17:13 - 07:40. Nautical Dark: 17:56 - 06:57. Astro Dark: 18:36 - 06:17

Total Clouds (% Sky Obscured)

60
45
35
37
42
42
56
71
80
80
77
73
45
37
29
29
28
27
35
45
57
61
60
60

Low Clouds (% Sky Obscured)

50
44
35
37
42
42
46
48
51
55
59
64
45
37
29
29
28
26
35
45
57
61
60
56

Medium Clouds (% Sky Obscured)

1
1
0
0
0
0
15
29
40
28
17
8
0
0
0
0
0
0
0
0
0
0
1
1

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
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 (%)

3
6
0
3
5
0
2
4
0
7
9
2
0
1
0
2
4
2
10
18
27
23
13
5

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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

91
91
93
91
89
91
91
91
92
92
91
91
91
89
88
86
85
83
82
85
88
93
93
89

Pressure (mb)

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

Ozone (du)

312
316
317
318
319
320
322
325
324
323
320
315
311
309
307
306
304
303
302
300
299
298
296
294

Wednesday 26

Waxing Crescent 44%

13:25

22:03

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

Sun - Rise: 08:20, Set: 16:34, Transit: 12:27. Moon - Rise: 13:25, Set: 22:03. Civil Dark: 17:13 - 07:41. Nautical Dark: 17:55 - 06:58. Astro Dark: 18:36 - 06:18

Total Clouds (% Sky Obscured)

52
45
38
57
72
88
76
69
79
73
66
61
74
85
95
95
94
95
96
97
99
99
98
98

Low Clouds (% Sky Obscured)

47
41
31
31
29
29
25
21
18
19
25
30
44
58
71
58
45
30
26
22
26
45
63
74

Medium Clouds (% Sky Obscured)

0
0
0
5
10
25
24
28
35
39
38
38
42
46
51
49
50
48
55
55
54
50
51
47

High Clouds (% Sky Obscured)

2
3
4
28
53
78
54
38
10
5
8
10
32
53
75
81
89
95
95
94
94
76
55
40

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 (%)

12
7
0
2
3
0
1
2
0
1
1
0
0
0
0
1
3
2
2
2
0
8
17
27

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)

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

Chance of Frost

Temperature (°C)

3
3
2
2
2
2
2
2
2
2
2
2
2
3
3
4
4
5
6
5
5
5
5
5

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

89
89
89
89
89
89
91
89
89
89
89
89
89
91
91
91
88
85
80
83
85
86
86
86

Pressure (mb)

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

Ozone (du)

292
292
292
292
294
296
298
299
300
301
299
298
297
296
295
294
293
291
290
289
289
288
287
286

Thursday 27

Waxing Crescent 55%

13:38

23:23

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: 08:22, Set: 16:33, Transit: 12:27. Moon - Rise: 13:38, Set: 23:23. Civil Dark: 17:12 - 07:42. Nautical Dark: 17:55 - 07:00. Astro Dark: 18:35 - 06:19

Total Clouds (% Sky Obscured)

99
99
100
100
99
99
98
98
97
98
99
100
99
98
98
98
99
100

Low Clouds (% Sky Obscured)

85
93
100
97
95
90
85
85
83
83
83
86
89
91
93
94
95
96

Medium Clouds (% Sky Obscured)

54
53
68
74
81
88
80
73
65
59
56
52
60
67
74
79
82
87

High Clouds (% Sky Obscured)

44
45
46
52
65
75
69
58
50
66
83
99
88
66
48
60
72
88

ISS Passover

Visibility (miles)

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

Precipitation Type

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

Precipitation Probability (%)

44
51
46
33
21
3
2
2
0
5
10
7
7
9
11
29
59
84

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.2
0.5

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

2
1
1
1
1
1
1
-1
-1
-1
-1
-1
-1
-2
-2
-1
-1
-1

Dew Point (°C)

3
2
3
3
2
2
2
2
1
1
1
1
1
1
2
2
2
3

Relative Humidity (%)

86
85
86
86
85
86
88
88
88
86
86
86
88
88
86
85
85
85

Pressure (mb)

1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
1019
1019
1019
1019
1019
1019
1019
1019

Ozone (du)

284
284
283
282
281
279
278
277
275
274
273
272
271
271
271
272
272
272

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

Generated: 21/11/25 19:17:45. Forecast: 21/11/25 to 27/11/25. Timezone: UTC+1.00