Clear Outside v1.0 - International Weather Forecasts For Astronomers

Friday 31

Waxing Gibbous 72%

15:23

01:45

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
23 OK
00 OK
01 OK
02 Bad

Sun - Rise: 07:36, Set: 17:14, Transit: 12:25. Moon - Rise: 15:23, Set: 01:45. Civil Dark: 17:49 - 07:01. Nautical Dark: 18:29 - 06:21. Astro Dark: 19:09 - 05:41

Total Clouds (% Sky Obscured)

98
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
77
66
62
30
25
21
24
43

Low Clouds (% Sky Obscured)

3
10
0
0
0
0
34
73
80
47
63
60
64
0
34
34
10
10
21
30
25
21
24
40

Medium Clouds (% Sky Obscured)

98
46
100
96
100
82
63
46
87
90
95
95
95
100
100
100
77
28
25
0
0
0
0
22

High Clouds (% Sky Obscured)

98
100
100
100
100
100
100
100
100
100
100
98
100
100
100
100
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
5
5
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
Light Rain
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
16
13
10
50
74
45
13
0
0
0
0
0
0
0

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.5
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

8
8
8
9
9
9
10
11
11
12
12
13
14
14
13
13
13
13
13
13
12
12
12
12

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

74
73
73
72
72
73
69
68
64
61
61
63
64
65
84
92
92
90
87
87
89
87
87
89

Pressure (mb)

1010
1010
1009
1009
1009
1009
1009
1009
1009
1009
1008
1008
1008
1008
1007
1008
1008
1008
1008
1008
1008
1007
1007
1007

Ozone (du)

259
261
262
262
264
266
267
268
270
271
270
270
270
272
275
276
279
278
275
277
277
275
275
275

Saturday 1

Waxing Gibbous 81%

15:35

No Set

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 OK
17 Bad
18 Bad
19 Bad
20 Bad
21 Bad
22 OK
23 Bad
00 Bad
01 Bad
02 Bad

Sun - Rise: 07:38, Set: 17:12, Transit: 12:25. Moon - Rise: 15:35, Set: No Set. Civil Dark: 17:48 - 07:02. Nautical Dark: 18:28 - 06:22. Astro Dark: 19:07 - 05:43

Total Clouds (% Sky Obscured)

52
77
100
100
100
100
100
100
100
100
100
100
44
34
59
61
46
41
31
36
73
85
91
99

Low Clouds (% Sky Obscured)

37
25
41
50
58
64
63
72
67
71
86
64
24
34
59
61
46
41
31
36
65
56
60
60

Medium Clouds (% Sky Obscured)

34
42
57
57
78
100
93
95
94
100
100
100
24
0
0
0
0
0
0
0
1
48
33
98

High Clouds (% Sky Obscured)

2
70
100
100
100
100
100
100
100
100
0
3
0
0
0
0
0
0
0
0
42
44
82
95

ISS Passover

Visibility (miles)

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

Precipitation Probability (%)

0
10
58
95
95
95
95
95
95
95
95
95
43
7
18
35
24
7
19
11
12
11
11
19

Precipitation Amount (mm)

0
0
0
1.7
0.8
0.5
1
0.9
0.7
1.5
1.1
0.8
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

11
10
11
10
9
10
10
10
11
11
10
10
9
11
10
10
9
9
10
10
10
9
9
7

Dew Point (°C)

10
10
11
10
10
10
10
12
12
13
11
10
10
9
9
9
9
9
9
8
9
9
9
9

Relative Humidity (%)

87
87
87
86
84
84
83
90
93
93
87
83
80
79
80
80
83
84
86
84
87
91
91
91

Pressure (mb)

1006
1006
1005
1005
1005
1005
1004
1004
1004
1004
1004
1005
1006
1006
1006
1007
1008
1008
1008
1008
1008
1008
1008
1008

Ozone (du)

275
276
278
279
282
283
282
281
281
281
282
285
289
291
293
294
296
300
302
306
306
305
306
305

Sunday 2

Waxing Gibbous 90%

15:46

03:10

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
23 Bad
00 OK
01 OK
02 OK

Sun - Rise: 07:40, Set: 17:10, Transit: 12:25. Moon - Rise: 15:46, Set: 03:10. Civil Dark: 17:46 - 07:04. Nautical Dark: 18:26 - 06:24. Astro Dark: 19:05 - 05:45

Total Clouds (% Sky Obscured)

98
93
96
93
85
88
61
56
59
87
84
100
100
100
85
77
67
64
63
59
31
11
17
35

Low Clouds (% Sky Obscured)

60
64
62
53
69
70
57
50
54
54
49
48
59
80
50
55
58
64
63
55
31
8
12
17

Medium Clouds (% Sky Obscured)

78
79
86
82
55
57
25
13
2
37
47
78
98
100
66
53
44
39
33
22
11
0
4
9

High Clouds (% Sky Obscured)

80
5
5
0
0
0
10
3
22
25
45
100
58
56
55
0
0
0
1
28
7
4
2
31

ISS Passover

Visibility (miles)

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

Precipitation Probability (%)

27
22
6
5
7
8
10
15
14
24
55
66
95
73
42
10
12
17
13
39
35
27
21
13

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

12
12
11
8
7
8
8
9
11
11
12
13
13
12
14
11
9
9
8
9
9
9
8
9

Chance of Frost

Temperature (°C)

10
10
10
10
10
9
10
11
11
12
13
13
12
11
11
10
10
10
10
10
10
10
10
9

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

91
88
84
87
88
90
88
85
81
75
67
64
77
83
74
72
68
69
71
72
76
78
81
81

Pressure (mb)

1008
1007
1007
1007
1007
1008
1008
1008
1008
1008
1007
1007
1007
1007
1008
1009
1010
1010
1011
1012
1012
1013
1013
1013

Ozone (du)

305
305
307
307
309
312
312
314
318
322
319
314
314
315
316
315
313
312
305
300
298
295
293
291

Monday 3

Waxing Gibbous 96%

15:58

04:37

03 OK
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
23 Bad
00 Bad
01 Bad
02 Bad

Sun - Rise: 07:42, Set: 17:08, Transit: 12:25. Moon - Rise: 15:58, Set: 04:37. Civil Dark: 17:44 - 07:06. Nautical Dark: 18:25 - 06:26. Astro Dark: 19:04 - 05:46

Total Clouds (% Sky Obscured)

44
69
84
100
100
100
100
100
100
100
100
100
100
100
100
100
99
99
97
95
97
96
76
77

Low Clouds (% Sky Obscured)

17
11
13
12
41
62
86
88
90
92
90
88
87
86
84
83
84
85
86
77
67
61
57
64

Medium Clouds (% Sky Obscured)

17
43
84
100
99
97
96
97
98
87
98
96
93
74
86
83
47
50
45
43
46
53
52
52

High Clouds (% Sky Obscured)

24
60
71
74
76
100
100
100
100
100
100
100
100
100
100
100
71
42
12
16
19
22
48
74

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
4
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
Very Light Rain
None
Light Rain
Light Rain
Light Rain
Light Rain
Very Light Rain
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

0
3
11
9
37
57
42
71
80
76
72
61
52
37
30
27
21
16
18
18
17
13
14
17

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

9
9
8
8
8
9
9
9
10
10
10
11
12
12
12
13
13
13
13
13
13
13
12
12

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

81
82
87
84
85
87
88
85
84
84
85
80
79
77
77
77
76
77
77
79
80
79
79
80

Pressure (mb)

1014
1014
1014
1014
1014
1014
1014
1014
1014
1014
1013
1013
1013
1013
1013
1014
1014
1014
1014
1014
1014
1015
1015
1015

Ozone (du)

288
286
283
282
280
279
278
278
279
279
276
276
277
275
273
271
271
270
270
269
269
268
267
266

Tuesday 4

Waxing Gibbous 99%

16:13

06:08

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
23 Bad
00 Bad
01 Bad
02 Bad

Sun - Rise: 07:44, Set: 17:07, Transit: 12:25. Moon - Rise: 16:13, Set: 06:08. Civil Dark: 17:43 - 07:08. Nautical Dark: 18:23 - 06:27. Astro Dark: 19:02 - 05:48

Total Clouds (% Sky Obscured)

83
88
95
100
100
100
100
100
100
100
94
87
91
100
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

69
78
81
90
86
82
78
78
77
76
75
73
72
75
79
83
61
39
17
11
6
0
0
0

Medium Clouds (% Sky Obscured)

49
52
59
62
58
49
40
40
42
41
44
35
25
16
16
20
32
44
64
78
87
93
95
97

High Clouds (% Sky Obscured)

83
88
95
100
96
96
95
95
95
95
94
87
91
100
100
100
100
100
100
100
100
100
100
100

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

Precipitation Probability (%)

18
19
22
24
34
35
36
21
15
8
19
18
10
33
48
64
74
79
72
54
29
4
4
1

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

81
83
84
84
86
83
79
76
74
72
69
69
68
68
69
71
72
71
72
72
73
74
77
74

Pressure (mb)

1014
1014
1014
1014
1014
1015
1015
1015
1015
1015
1015
1015
1015
1015
1015
1015
1014
1014
1014
1014
1013
1013
1012
1012

Ozone (du)

265
264
263
262
261
261
262
261
261
261
261
261
261
261
260
259
259
259
259
259
260
260
261
261

Wednesday 5

Full Moon 100%

16:32

07:44

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
23 Bad
00 Bad
01 Bad
02 Bad

Sun - Rise: 07:45, Set: 17:05, Transit: 12:25. Moon - Rise: 16:32, Set: 07:44. Civil Dark: 17:41 - 07:09. Nautical Dark: 18:21 - 06:29. Astro Dark: 19:01 - 05:49

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
99
99
98
99
99
100
100
99
99
99
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

0
0
0
0
24
45
67
52
37
20
17
13
9
11
12
12
19
28
29
28
23
22
44
64

Medium Clouds (% Sky Obscured)

98
99
99
100
99
99
99
91
84
76
78
81
83
81
79
77
85
92
100
100
100
100
99
98

High Clouds (% Sky Obscured)

100
100
99
99
97
95
93
92
92
89
90
94
100
99
98
96
98
99
100
100
100
100
100
100

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 (%)

1
9
19
27
44
46
46
37
34
27
26
21
10
15
14
4
9
12
13
18
19
19
27
25

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)

9
9
9
9
9
9
10
10
10
10
10
9
9
9
8
8
9
9
8
8
8
8
9
9

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

6
6
6
6
6
6
7
6
7
7
8
11
10
10
10
10
10
10
10
11
10
11
10
10

Dew Point (°C)

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

Relative Humidity (%)

73
72
72
71
71
69
67
65
64
64
64
65
68
71
71
74
75
77
81
84
87
90
93
93

Pressure (mb)

1011
1011
1011
1010
1010
1010
1010
1010
1010
1010
1010
1010
1010
1010
1010
1010
1010
1009
1009
1009
1009
1008
1008
1007

Ozone (du)

261
261
262
262
263
265
268
270
271
273
274
274
275
275
276
276
276
275
274
273
274
274
275
276

Thursday 6

Waning Gibbous 97%

17:00

09:23

Sun - Rise: 07:47, Set: 17:03, Transit: 12:25. Moon - Rise: 17:00, Set: 09:23. Civil Dark: 17:39 - 07:11. Nautical Dark: 18:20 - 06:30. Astro Dark: 18:59 - 05:51

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 Leiden, Gemeente Leiden, Netherlands (52.16,4.50)

Generated: 31/10/25 02:53:25. Forecast: 31/10/25 to 06/11/25. Timezone: UTC+1.00