Clear Outside v1.0 - International Weather Forecasts For Astronomers

Thursday 17

Waning Gibbous 48%

00:12

15:15

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

Sun - Rise: 05:34, Set: 21:52, Transit: 13:42. Moon - Rise: 00:12, Set: 15:15. Civil Dark: 22:38 - 04:48. Nautical Dark: 23:48 - 03:38. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

96
74
55
91
72
30
61
67
68
84
100
100
93
24
91
79
94
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

41
29
20
8
20
16
24
5
0
0
0
26
0
0
31
60
60
45
22
73
70
80
82
22

Medium Clouds (% Sky Obscured)

10
0
0
0
0
0
0
0
0
0
0
0
23
0
0
6
51
16
8
4
6
10
8
4

High Clouds (% Sky Obscured)

0
1
8
86
59
26
41
64
68
83
100
100
92
24
82
32
78
100
100
100
99
83
89
99

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
4
1
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)

12
11
9
8
6
5
5
5
4
4
4
4
3
3
3
3
3
2
3
3
2
3
4
5

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

18
19
19
19
18
15
15
16
15
15
15
14
14
15
17
20
21
22
23
24
25
25
25
25

Dew Point (°C)

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

Relative Humidity (%)

65
67
71
78
93
95
96
96
96
96
95
96
95
95
87
80
70
63
59
56
56
55
57
58

Pressure (mb)

1016
1016
1015
1016
1016
1016
1016
1016
1015
1015
1015
1015
1015
1015
1015
1015
1015
1015
1015
1014
1014
1014
1013
1013

Ozone (du)

314
314
314
313
312
312
311
307
305
304
303
305
307
306
306
306
306
307
309
309
311
313
316
317

Friday 18

Third Quarter 36%

00:27

16:48

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

Sun - Rise: 05:35, Set: 21:50, Transit: 13:42. Moon - Rise: 00:27, Set: 16:48. Civil Dark: 22:37 - 04:49. Nautical Dark: 23:46 - 03:41. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

100
65
82
23
18
20
55
99
100
97
64
83
52
66
36
35
56
58
87
37
73
100
100
100

Low Clouds (% Sky Obscured)

4
8
29
4
16
20
25
26
28
24
23
23
17
13
0
0
17
24
22
20
25
24
15
25

Medium Clouds (% Sky Obscured)

3
3
18
10
3
2
0
0
0
0
0
0
0
0
0
35
4
24
10
4
30
30
4
49

High Clouds (% Sky Obscured)

100
65
62
12
1
2
53
99
100
95
53
69
29
41
16
10
13
14
70
13
50
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 (%)

0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
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)

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

Chance of Frost

Temperature (°C)

25
25
24
21
19
18
18
17
17
17
17
16
16
17
19
21
23
24
25
26
27
28
28
28

Feels Like (°C)

25
25
23
21
20
20
20
18
17
17
16
16
16
17
19
19
22
22
23
24
24
26
26
27

Dew Point (°C)

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

Relative Humidity (%)

55
58
63
74
85
92
95
93
95
96
93
95
95
90
82
69
61
54
50
46
44
40
39
39

Pressure (mb)

1013
1013
1013
1013
1013
1013
1012
1012
1012
1011
1011
1011
1011
1010
1010
1010
1009
1009
1009
1008
1007
1007
1006
1006

Ozone (du)

320
321
322
324
326
322
321
321
320
318
316
314
313
313
312
312
313
314
315
316
317
317
317
319

Saturday 19

Waning Crescent 25%

00:46

No Set

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
15 Bad
16 Bad
17 Bad

Sun - Rise: 05:37, Set: 21:49, Transit: 13:42. Moon - Rise: 00:46, Set: No Set. Civil Dark: 22:35 - 04:51. Nautical Dark: 23:43 - 03:44. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
91
92
100
100
100
100
100
100
100
99
97
96
97

Low Clouds (% Sky Obscured)

20
28
4
27
27
17
16
34
67
59
56
61
58
56
39
67
81
72
63
54
52
50
47
56

Medium Clouds (% Sky Obscured)

39
46
86
100
100
99
100
78
85
71
57
61
56
57
52
45
67
91
98
89
91
92
94
96

High Clouds (% Sky Obscured)

100
100
100
100
100
98
100
100
100
100
100
15
41
100
100
100
100
95
100
100
83
66
49
69

ISS Passover

Visibility (miles)

9
9
9
7
3
3
9
9
9
9
9
9
9
9
9
9
9
9
9
9
7
3
9
5

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

Precipitation Probability (%)

17
33
54
78
90
94
54
42
57
70
22
15
20
23
40
32
9
22
16
39
89
85
82
86

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

10
12
12
6
6
8
4
3
2
2
6
6
6
6
9
9
5
4
7
7
7
9
8
8

Chance of Frost

Temperature (°C)

27
27
24
23
21
20
19
19
18
18
18
18
18
19
19
19
19
19
20
21
21
21
20
20

Feels Like (°C)

25
25
22
23
21
20
21
21
20
20
19
19
19
19
18
19
20
21
21
21
22
20
20
20

Dew Point (°C)

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

Relative Humidity (%)

47
49
71
70
88
93
93
93
93
93
93
95
95
92
91
89
93
91
84
84
85
85
86
85

Pressure (mb)

1005
1005
1004
1004
1005
1005
1005
1005
1005
1004
1004
1004
1003
1004
1004
1004
1004
1004
1004
1004
1004
1004
1004
1004

Ozone (du)

320
318
325
322
322
323
321
321
318
318
317
318
319
321
320
323
327
330
327
330
332
333
332
336

Sunday 20

Waning Crescent 15%

01:16

18:20

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
15 Bad
16 Bad
17 Bad

Sun - Rise: 05:38, Set: 21:48, Transit: 13:42. Moon - Rise: 01:16, Set: 18:20. Civil Dark: 22:34 - 04:53. Nautical Dark: 23:41 - 03:46. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

99
100
100
100
100
100
72
70
68
77
56
51
58
65
54
49
34
43
84
93
67
86
82
88

Low Clouds (% Sky Obscured)

41
48
45
39
35
36
35
33
41
57
55
51
58
65
54
47
34
38
62
62
43
51
44
44

Medium Clouds (% Sky Obscured)

98
100
100
50
77
92
29
25
17
10
3
0
3
3
3
3
3
6
9
78
14
62
82
88

High Clouds (% Sky Obscured)

86
50
100
100
100
100
72
70
54
30
1
1
0
0
0
0
0
21
42
63
45
30
18
40

ISS Passover

Visibility (miles)

9
4
7
8
2
9
9
9
9
9
9
9
9
9
9
9
9
9
7
6
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
Light Rain
None
None
None
None
None
None
None
None
None
None
None
None
None
Light Rain
None
Very Light Rain
Very Light Rain
None
Light Rain

Precipitation Probability (%)

91
94
95
95
86
39
29
21
25
43
20
32
36
7
20
25
16
44
72
46
60
52
40
78

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

89
84
85
85
92
93
93
95
95
95
95
96
95
95
89
81
69
60
63
71
84
72
85
89

Pressure (mb)

1004
1004
1004
1004
1004
1004
1004
1004
1004
1003
1003
1003
1003
1003
1003
1004
1004
1004
1003
1004
1003
1003
1003
1004

Ozone (du)

341
348
347
346
347
349
353
354
353
354
352
350
351
350
349
348
349
350
351
351
348
348
349
350

Monday 21

Waning Crescent 8%

02:02

19:44

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
15 Bad
16 Bad
17 Bad

Sun - Rise: 05:40, Set: 21:46, Transit: 13:42. Moon - Rise: 02:02, Set: 19:44. Civil Dark: 22:32 - 04:54. Nautical Dark: 23:38 - 03:49. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

93
100
99
89
86
82
93
91
90
90
90
93
96
100
83
81
78
82
84
85
83
81
79
83

Low Clouds (% Sky Obscured)

45
45
38
36
37
48
59
71
69
74
72
72
73
73
64
67
71
72
77
78
76
73
71
54

Medium Clouds (% Sky Obscured)

84
83
74
26
29
25
27
34
60
61
56
51
47
45
76
81
78
61
43
25
21
15
7
5

High Clouds (% Sky Obscured)

76
100
97
83
82
57
38
11
22
34
48
65
83
91
13
7
2
2
2
2
16
41
67
71

ISS Passover

Visibility (miles)

7
3
8
5
9
9
9
9
5
3
3
2
8
8
8
8
7
7
7
7
7
7
8
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
Very Light Rain
Very Light Rain
None
Light Rain
Light Rain
Light Rain
Very Light Rain
None
None
Light Rain
Very Light Rain
Very Light Rain
Very Light Rain
Light Rain
Light Rain
Light Rain
Very Light Rain
None
None

Precipitation Probability (%)

95
95
84
62
59
75
68
43
76
94
85
77
60
50
71
69
62
66
75
83
76
66
52
39

Precipitation Amount (mm)

1.1
1.3
0.4
0
0
0.3
0.3
0
0.4
0.8
0.6
0.3
0
0
0.4
0.3
0.2
0.3
0.4
0.6
0.5
0.3
0
0

Wind Speed/Direction (mph)

10
8
7
7
6
7
7
8
9
11
11
8
9
9
10
11
12
13
14
16
17
18
18
18

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

91
96
96
96
96
95
96
98
98
96
95
98
96
95
95
93
95
93
90
88
85
78
72
67

Pressure (mb)

1004
1004
1004
1004
1004
1004
1004
1003
1003
1003
1003
1003
1003
1004
1004
1006
1007
1007
1008
1008
1009
1009
1010
1010

Ozone (du)

350
351
352
353
356
357
354
350
349
348
345
346
344
344
343
343
344
344
342
341
339
338
337
337

Tuesday 22

Waning Crescent 3%

03:07

20:51

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

Sun - Rise: 05:41, Set: 21:45, Transit: 13:42. Moon - Rise: 03:07, Set: 20:51. Civil Dark: 22:30 - 04:56. Nautical Dark: 23:36 - 03:51. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

88
94
76
55
32
54
77
98
99
99
100
100
100
100
100
100
100
99
99
99
100
100
100
100

Low Clouds (% Sky Obscured)

37
24
19
12
0
2
5
7
7
7
7
24
41
59
68
76
86
81
74
66
61
56
52
56

Medium Clouds (% Sky Obscured)

3
1
4
8
12
30
47
66
73
81
87
92
96
100
96
93
88
90
92
95
92
90
90
85

High Clouds (% Sky Obscured)

78
85
76
55
32
54
67
84
90
95
100
100
100
100
100
100
100
99
99
98
99
99
100
100

ISS Passover

Visibility (miles)

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

Precipitation Probability (%)

28
12
11
8
0
1
1
1
26
24
25
50
63
67
85
95
95
95
95
95
95
95
95
95

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0.2
0.2
0.4
0.6
0.9
1.1
1.1
1.1
0.8
0.7
0.8
0.5

Wind Speed/Direction (mph)

16
14
12
10
7
5
5
5
5
6
7
8
7
7
7
7
8
9
8
7
7
7
7
8

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

68
70
72
74
78
82
83
84
89
89
90
92
92
92
93
90
87
85
78
72
67
64
64
62

Pressure (mb)

1010
1011
1011
1011
1011
1011
1011
1011
1010
1010
1009
1009
1009
1009
1008
1008
1008
1007
1007
1007
1007
1007
1007
1006

Ozone (du)

336
336
335
335
336
336
337
338
339
340
341
341
343
344
345
345
346
346
347
348
349
349
349
349

Wednesday 23

Waning Crescent 0%

04:30

21:36

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

Sun - Rise: 05:43, Set: 21:44, Transit: 13:42. Moon - Rise: 04:30, Set: 21:36. Civil Dark: 22:29 - 04:58. Nautical Dark: 23:33 - 03:54. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

100
100
100
100
100
98
97
95
96
97
98
94
91
87
89
91
93
95
97
99

Low Clouds (% Sky Obscured)

66
71
78
86
85
83
81
77
72
68
64
58
52
43
52
57
67
71
75
80

Medium Clouds (% Sky Obscured)

84
79
80
80
62
66
71
81
85
90
93
90
88
87
88
89
90
93
95
96

High Clouds (% Sky Obscured)

100
100
100
100
100
98
97
95
75
54
33
27
22
16
27
36
42
47
47
47

ISS Passover

Visibility (miles)

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

Fog (%)

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

Precipitation Type

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

Precipitation Probability (%)

88
78
86
95
95
95
95
95
91
76
57
60
50
34
40
45
49
54
57
59

Precipitation Amount (mm)

0.4
0.2
0.4
0.6
0.8
0.8
0.8
1
0.5
0.4
0.2
0.3
0
0
0
0
0
0
0
0.2

Wind Speed/Direction (mph)

9
9
10
10
10
10
9
9
8
8
7
7
7
8
9
10
12
13
13
14

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

18
18
19
15
16
15
15
14
14
14
14
14
13
14
14
15
14
14
14
14

Dew Point (°C)

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

Relative Humidity (%)

64
67
71
77
85
90
92
92
93
93
95
95
95
95
93
93
92
90
90
90

Pressure (mb)

1007
1007
1007
1007
1008
1008
1008
1008
1008
1008
1008
1008
1008
1008
1008
1008
1008
1008
1009
1009

Ozone (du)

349
348
347
347
346
345
345
344
343
342
342
341
341
341
341
341
341
340
341
342

Forecast for Heerenveen, Gemeente Heerenveen, Netherlands (52.96,5.92)

Generated: 17/07/25 18:09:11. Forecast: 17/07/25 to 23/07/25. Timezone: UTC+2.00