Clear Outside v1.0 - International Weather Forecasts For Astronomers

Thursday 25

Waxing Crescent 28%

11:44

22:36

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

Sun - Rise: 08:41, Set: 16:43, Transit: 12:42. Moon - Rise: 11:44, Set: 22:36. Civil Dark: 17:22 - 08:03. Nautical Dark: 18:04 - 07:21. Astro Dark: 18:43 - 06:41

Total Clouds (% Sky Obscured)

40
40
39
25
18
18
20
22
24
23
26
23
0
0
0
6
9
0
0
0
0
0
0
0

Low Clouds (% Sky Obscured)

31
34
27
25
18
18
20
22
21
20
24
22
0
0
0
6
9
0
0
0
0
0
0
0

Medium 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

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 (%)

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)

19
19
19
20
20
19
18
17
17
17
16
16
16
15
14
14
14
13
13
12
11
9
9
10

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-10
-10
-10
-11
-11
-11
-11
-11
-11
-11
-10
-10
-9
-7
-7
-6
-6
-6
-7
-6
-7
-7
-7
-7

Dew Point (°C)

-10
-12
-13
-14
-15
-15
-16
-16
-16
-16
-16
-15
-14
-13
-12
-11
-11
-10
-11
-11
-11
-11
-10
-10

Relative Humidity (%)

57
51
47
43
41
40
39
40
41
41
41
41
41
42
44
46
49
53
51
52
52
56
58
60

Pressure (mb)

1027
1027
1026
1026
1026
1026
1026
1026
1027
1027
1027
1027
1027
1026
1026
1026
1026
1026
1026
1026
1026
1026
1027
1027

Ozone (du)

381
383
380
375
370
370
366
365
364
362
363
363
364
365
367
370
369
366
362
359
355
353
351
350

Friday 26

Waxing Crescent 38%

11:57

23:53

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

Sun - Rise: 08:42, Set: 16:44, Transit: 12:43. Moon - Rise: 11:57, Set: 23:53. Civil Dark: 17:22 - 08:03. Nautical Dark: 18:04 - 07:21. Astro Dark: 18:44 - 06:41

Total Clouds (% Sky Obscured)

0
0
0
10
24
26
22
4
4
0
0
0
1
1
2
4
12
19
25
18
32
22
17
80

Low Clouds (% Sky Obscured)

0
0
0
10
24
26
22
4
4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2
10
1
1
0
0

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
1
2
4
12
19
25
7
30
21
17
80

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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-7
-7
-7
-7
-7
-7
-7
-6
-6
-6
-5
-4
-3
-2
-1
-0
-2
-3
-5
-5
-5
-4
-4
-4

Dew Point (°C)

-10
-10
-9
-9
-9
-9
-8
-8
-7
-7
-7
-8
-7
-6
-6
-4
-4
-4
-4
-4
-4
-4
-4
-4

Relative Humidity (%)

61
63
65
66
68
68
69
72
73
75
71
63
60
58
58
64
71
77
80
81
81
80
78
80

Pressure (mb)

1027
1027
1027
1027
1026
1026
1026
1026
1026
1027
1027
1028
1028
1027
1027
1028
1028
1028
1029
1029
1029
1030
1030
1030

Ozone (du)

352
350
346
346
344
341
338
334
332
328
325
323
321
321
319
317
316
314
311
309
308
310
309
309

Saturday 27

First Quarter 49%

12:10

No Set

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

Sun - Rise: 08:42, Set: 16:44, Transit: 12:43. Moon - Rise: 12:10, Set: No Set. Civil Dark: 17:23 - 08:03. Nautical Dark: 18:05 - 07:21. Astro Dark: 18:45 - 06:41

Total Clouds (% Sky Obscured)

78
63
11
23
0
0
0
0
0
3
3
3
3
3
1
2
1
1
15
46
71
93
88
87

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
15
46
71
93
88
87

Medium Clouds (% Sky Obscured)

0
0
0
20
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

78
63
11
0
0
0
0
0
0
1
2
2
2
2
1
1
0
1
0
1
4
1
3
4

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
2
8
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-5
-5
-6
-7
-8
-10
-11
-11
-11
-11
-11
-10
-8
-7
-5
-4
-4
-3
-1
-1
-0
0
-1
-1

Relative Humidity (%)

78
77
72
67
58
53
49
49
49
49
46
47
48
51
56
61
68
78
91
96
98
98
96
96

Pressure (mb)

1030
1030
1030
1031
1030
1030
1030
1030
1031
1032
1032
1032
1032
1031
1031
1031
1031
1032
1032
1032
1032
1032
1032
1033

Ozone (du)

309
308
307
306
305
303
302
301
302
302
302
302
302
301
301
300
300
299
298
298
299
299
297
297

Sunday 28

Waxing Gibbous 61%

12:24

01:12

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 OK
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad

Sun - Rise: 08:42, Set: 16:45, Transit: 12:44. Moon - Rise: 12:24, Set: 01:12. Civil Dark: 17:24 - 08:03. Nautical Dark: 18:06 - 07:21. Astro Dark: 18:46 - 06:42

Total Clouds (% Sky Obscured)

87
95
96
97
100
100
100
91
81
79
81
83
81
76
72
68
58
51
45
49
53
56
57
54

Low Clouds (% Sky Obscured)

87
95
96
97
100
100
100
91
81
79
81
83
81
76
72
68
58
51
45
49
53
56
57
54

Medium 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

High Clouds (% Sky Obscured)

5
7
7
8
5
3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

ISS Passover

Visibility (miles)

8
9
1
0
0
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-0
-0
-0
0
0
0
-0
-1
-1
-1
-1
-2
-3
-4
-4
-4
-3
-4
-4
-5
-6
-7
-8
-9

Relative Humidity (%)

98
98
98
98
100
98
94
92
94
92
91
83
74
65
61
63
69
71
71
67
65
61
59
55

Pressure (mb)

1032
1032
1032
1032
1032
1032
1031
1031
1032
1032
1032
1032
1032
1032
1031
1031
1031
1031
1031
1031
1031
1031
1031
1031

Ozone (du)

298
297
298
298
298
298
296
294
295
298
299
298
298
296
295
293
291
289
289
289
290
291
292
292

Monday 29

Waxing Gibbous 72%

12:40

02:35

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

Sun - Rise: 08:42, Set: 16:46, Transit: 12:44. Moon - Rise: 12:40, Set: 02:35. Civil Dark: 17:25 - 08:03. Nautical Dark: 18:07 - 07:22. Astro Dark: 18:46 - 06:42

Total Clouds (% Sky Obscured)

49
45
43
45
43
28
19
31
42
53
46
41
40
41
33
34
33
34
38
58
78
98
96
94

Low Clouds (% Sky Obscured)

49
45
43
45
43
28
19
31
42
53
46
41
40
41
33
34
33
34
38
58
78
96
94
91

Medium 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

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 (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
2
3
2
8
10
12
11
8

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-9
-9
-9
-9
-9
-8
-9
-8
-7
-6
-4
-3
-2
-1
-0
0
1
1
1
1
1
1
1
0

Relative Humidity (%)

54
52
53
55
57
58
58
60
64
70
73
71
72
72
77
83
89
91
94
96
89
85
79
79

Pressure (mb)

1030
1030
1030
1030
1030
1030
1029
1029
1029
1029
1029
1029
1029
1028
1028
1028
1027
1027
1027
1027
1028
1028
1028
1028

Ozone (du)

290
288
286
286
284
284
289
291
292
290
290
290
289
288
288
287
287
289
290
292
293
294
295
294

Tuesday 30

Waxing Gibbous 82%

13:01

04:02

00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 OK
07 OK
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

Sun - Rise: 08:42, Set: 16:47, Transit: 12:45. Moon - Rise: 13:01, Set: 04:02. Civil Dark: 17:26 - 08:03. Nautical Dark: 18:08 - 07:22. Astro Dark: 18:47 - 06:42

Total Clouds (% Sky Obscured)

91
87
84
78
59
40
24
27
30
35
48
60
72
78
82
85
85
84
87
80
73
66
66
67

Low Clouds (% Sky Obscured)

90
86
80
76
57
38
23
23
21
24
35
48
61
70
77
85
85
84
82
76
68
63
61
58

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
1
1
2
3
5
6
10
7
7
6
6
2
2
1
0
0
0

High Clouds (% Sky Obscured)

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

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
2
2
2
7
8
9
14
15
6
11
10
1
2
2
1
5
5
2
6
7
3
7
9

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
5
6
6
6
5
5
5
4
4
4
5
5
5
5
5
5
4
4
4
4
4
4

Chance of Frost

Temperature (°C)

4
3
3
3
3
2
1
1
1
1
1
2
3
4
4
4
4
4
3
3
3
3
3
2

Feels Like (°C)

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

Dew Point (°C)

1
0
1
1
1
1
0
0
-0
-1
-1
-1
-1
-1
-1
-0
0
0
0
0
0
0
-1
-1

Relative Humidity (%)

80
80
83
86
89
91
93
94
91
88
88
80
75
71
72
73
76
77
80
82
82
82
80
79

Pressure (mb)

1028
1028
1028
1028
1029
1029
1029
1029
1029
1030
1030
1030
1030
1030
1030
1029
1029
1029
1029
1029
1029
1029
1029
1028

Ozone (du)

293
293
291
290
289
287
285
284
283
282
281
284
288
291
304
317
330
330
330
330
331
332
333
336

Wednesday 31

Waxing Gibbous 91%

13:31

05:33

Sun - Rise: 08:42, Set: 16:48, Transit: 12:45. Moon - Rise: 13:31, Set: 05:33. Civil Dark: 17:27 - 08:03. Nautical Dark: 18:08 - 07:22. Astro Dark: 18:48 - 06:42

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 Charleroi, Hainaut Province, Kingdom of Belgium (50.41,4.44)

Generated: 24/12/25 23:44:02. Forecast: 25/12/25 to 31/12/25. Timezone: UTC+1.00