Clear Outside v1.0 - International Weather Forecasts For Astronomers

Monday 20

Waxing Gibbous 100%

20:04

07:34

15 Bad
16 Bad
17 Bad
18 OK
19 Good
20 Good
21 Good
22 Good
23 Good
00 Good
01 OK
02 OK
03 OK
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: 19:44, Transit: 13:35. Moon - Rise: 20:04, Set: 07:34. Civil Dark: 20:17 - 06:55. Nautical Dark: 20:56 - 06:16. Astro Dark: 21:37 - 05:36

Total Clouds (% Sky Obscured)

87
72
52
42
5
8
12
19
16
6
25
35
23
86
97
65
53
86
96
67
88
72
99
100

Low Clouds (% Sky Obscured)

2
0
1
1
5
8
12
19
16
6
25
35
23
8
1
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

74
25
4
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)

49
63
50
42
0
0
0
0
0
0
0
0
0
84
97
64
53
86
96
67
88
72
99
100

ISS Passover

Visibility (miles)

10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10

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)

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

Chance of Frost

Temperature (°C)

20
20
20
19
17
16
14
14
13
12
11
10
10
9
9
8
8
7
9
11
13
15
16
18

Feels Like (°C)

20
20
20
19
17
16
14
14
13
12
11
10
9
8
7
7
6
6
8
11
13
15
16
18

Dew Point (°C)

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

Relative Humidity (%)

58
56
56
59
64
70
73
78
82
86
89
91
93
94
94
93
92
90
87
78
71
65
60
56

Pressure (mb)

1021
1021
1021
1021
1022
1022
1023
1023
1024
1024
1025
1025
1025
1026
1026
1026
1027
1027
1028
1028
1029
1029
1029
1029

Ozone (du)

289
289
289
289
290
290
290
290
290
292
291
290
287
286
286
286
286
284
284
283
283
283
283
283

Tuesday 21

Full Moon 99%

20:19

08:47

15 Bad
16 OK
17 Good
18 Good
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: 07:29, Set: 19:42, Transit: 13:35. Moon - Rise: 20:19, Set: 08:47. Civil Dark: 20:15 - 06:57. Nautical Dark: 20:54 - 06:18. Astro Dark: 21:34 - 05:38

Total Clouds (% Sky Obscured)

94
42
5
2
70
84
87
89
86
88
91
95
95
96
99
98
98
99
98
95
89
82
81
77

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

High Clouds (% Sky Obscured)

94
42
5
2
70
84
87
89
86
88
91
95
95
96
99
98
98
99
98
95
89
82
81
77

ISS Passover

Visibility (miles)

10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10

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)

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

Chance of Frost

Temperature (°C)

19
19
19
19
17
15
13
12
12
11
11
10
9
9
8
8
7
7
9
12
14
16
17
19

Feels Like (°C)

19
19
19
19
17
15
13
12
12
11
11
10
9
9
8
7
7
6
8
12
14
16
17
19

Dew Point (°C)

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

Relative Humidity (%)

53
51
52
57
64
70
74
80
86
90
93
96
97
97
96
96
96
93
90
80
73
68
64
60

Pressure (mb)

1029
1028
1028
1028
1028
1029
1029
1029
1029
1029
1029
1029
1028
1028
1028
1028
1028
1029
1029
1029
1029
1029
1028
1028

Ozone (du)

282
282
282
283
284
283
283
282
281
280
279
279
278
276
276
275
275
274
274
273
273
273
272
274

Wednesday 22

Waning Gibbous 96%

20:33

09:58

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

Sun - Rise: 07:31, Set: 19:40, Transit: 13:34. Moon - Rise: 20:33, Set: 09:58. Civil Dark: 20:12 - 06:58. Nautical Dark: 20:51 - 06:20. Astro Dark: 21:32 - 05:39

Total Clouds (% Sky Obscured)

65
62
47
2
0
0
0
0
0
0
0
0
0
0
0
0
0
8
8
8
8
8
8
95

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
8
8
8
8
8
8
51

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
5

High Clouds (% Sky Obscured)

65
62
47
2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
90

ISS Passover

Visibility (miles)

10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10

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)

6
5
5
4
4
3
3
3
4
5
6
6
7
7
8
8
8
8
9
10
11
12
13
13

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

20
20
20
20
18
16
15
14
13
12
12
11
11
11
10
8
7
7
11
13
15
17
18
20

Dew Point (°C)

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

Relative Humidity (%)

56
55
56
61
68
74
78
82
88
92
95
97
98
98
97
96
96
96
92
84
80
76
72
67

Pressure (mb)

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

Ozone (du)

274
273
273
273
274
274
274
275
275
275
274
273
273
273
273
272
272
274
274
274
275
274
274
273

Thursday 23

Waning Gibbous 91%

20:48

11:08

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: 07:33, Set: 19:37, Transit: 13:34. Moon - Rise: 20:48, Set: 11:08. Civil Dark: 20:10 - 07:00. Nautical Dark: 20:49 - 06:21. Astro Dark: 21:29 - 05:41

Total Clouds (% Sky Obscured)

95
95
95
95
95
98
98
98
98
98
98
100
100
100
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

51
51
51
51
51
87
87
87
87
87
87
100
100
100
100
100
100
100
100
100
100
100
100
100

Medium Clouds (% Sky Obscured)

5
5
5
5
5
0
0
0
0
0
0
2
2
2
2
2
2
0
0
0
0
0
0
1

High Clouds (% Sky Obscured)

90
90
90
90
90
84
84
84
84
84
84
0
0
0
0
0
0
0
0
0
0
0
0
0

ISS Passover

Visibility (miles)

10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10

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
1
2
0
2
5
3
3
2
3
3
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Amount (mm)

0
0.01
0.01
0.01
0
0.01
0.05
0.03
0.03
0.02
0.02
0.01
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

20
21
21
20
18
17
16
15
14
14
13
13
12
12
11
11
10
10
11
13
15
16
18
19

Feels Like (°C)

20
21
21
20
18
17
16
15
14
14
13
13
12
12
11
11
8
9
11
13
15
16
18
19

Dew Point (°C)

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

Relative Humidity (%)

64
62
66
69
74
78
83
87
92
96
98
99
100
100
99
100
100
98
93
86
80
74
66
61

Pressure (mb)

1018
1017
1016
1016
1016
1016
1017
1017
1017
1017
1017
1017
1016
1016
1016
1016
1016
1017
1017
1017
1017
1017
1017
1016

Ozone (du)

272
272
272
272
272
273
274
275
275
275
274
278
278
278
277
277
277
275
275
276
276
276
276
274

Friday 24

Waning Gibbous 84%

21:04

12:19

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

Sun - Rise: 07:34, Set: 19:35, Transit: 13:34. Moon - Rise: 21:04, Set: 12:19. Civil Dark: 20:08 - 07:01. Nautical Dark: 20:47 - 06:23. Astro Dark: 21:27 - 05:43

Total Clouds (% Sky Obscured)

100
100
100
100
100
13
13
13
13
13
13
6
6
6
6
6
6
6
6
6
6
6
6
78

Low Clouds (% Sky Obscured)

100
100
100
100
100
13
13
13
13
13
13
6
6
6
6
6
6
6
6
6
6
6
6
78

Medium Clouds (% Sky Obscured)

1
1
1
1
1
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)

10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10

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
2
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
0.01
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

20
21
21
20
18
17
15
15
14
13
13
12
12
12
12
11
10
10
12
14
15
17
18
19

Feels Like (°C)

20
21
21
20
18
17
15
15
14
13
13
12
12
12
12
11
10
10
12
14
15
17
18
19

Dew Point (°C)

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

Relative Humidity (%)

55
53
55
61
71
76
81
87
95
97
98
100
100
100
100
100
100
100
98
95
93
89
85
78

Pressure (mb)

1016
1015
1015
1014
1014
1014
1014
1014
1014
1014
1014
1015
1015
1014
1014
1014
1014
1015
1015
1015
1015
1015
1015
1015

Ozone (du)

273
273
273
272
272
273
273
273
273
272
271
273
273
272
271
271
271
271
271
270
270
270
271
272

Saturday 25

Waning Gibbous 77%

21:24

13:28

15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Good
21 Good
22 Good
23 Good
00 Good
01 Good
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

Sun - Rise: 07:36, Set: 19:33, Transit: 13:33. Moon - Rise: 21:24, Set: 13:28. Civil Dark: 20:06 - 07:03. Nautical Dark: 20:44 - 06:25. Astro Dark: 21:24 - 05:45

Total Clouds (% Sky Obscured)

78
78
78
78
78
2
2
2
2
2
2
56
56
56
56
56
56
20
20
20
20
20
20
84

Low Clouds (% Sky Obscured)

78
78
78
78
78
2
2
2
2
2
2
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
7
7
7
7
7
7
5
5
5
5
5
5
0

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
54
54
54
54
54
54
17
17
17
17
17
17
84

ISS Passover

Visibility (miles)

10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10

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
Very Light Rain

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
2
2
0
0
0
0
0
0
0
0
0
0
4
6

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0.01
0.01
0
0
0
0
0
0
0
0
0
0
0.02
0.04

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

75
75
77
81
84
87
91
94
98
100
100
100
100
100
100
100
100
98
97
93
91
89
86
81

Pressure (mb)

1015
1015
1014
1014
1014
1015
1015
1015
1015
1015
1015
1015
1015
1015
1014
1014
1014
1014
1014
1014
1015
1015
1015
1014

Ozone (du)

272
273
273
272
272
271
271
270
270
270
271
272
274
277
279
280
281
282
283
284
284
284
284
283

Sunday 26

Waning Gibbous 68%

21:49

14:35

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

Sun - Rise: 07:37, Set: 19:31, Transit: 13:33. Moon - Rise: 21:49, Set: 14:35. Civil Dark: 20:03 - 07:05. Nautical Dark: 20:42 - 06:26. Astro Dark: 21:22 - 05:47

Total Clouds (% Sky Obscured)

84
84
84
84
84
50
50
50
50
50
50
6
6
6
6
6
6
94
94
94
94
94
94
98

Low Clouds (% Sky Obscured)

0
0
0
0
0
5
5
5
5
5
5
2
2
2
2
2
2
31
31
31
31
31
31
17

Medium Clouds (% Sky Obscured)

0
0
0
0
0
17
17
17
17
17
17
6
6
6
6
6
6
15
15
15
15
15
15
94

High Clouds (% Sky Obscured)

84
84
84
84
84
41
41
41
41
41
41
0
0
0
0
0
0
91
91
91
91
91
91
77

ISS Passover

Visibility (miles)

10
9
7
9
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10

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

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

Precipitation Probability (%)

10
13
17
25
31
37
39
32
19
9
6
0
0
0
0
0
0
0
0
3
3
1
0
0

Precipitation Amount (mm)

0.06
0.07
0.09
0.15
0.24
0.3
0.25
0.15
0.09
0.04
0.01
0
0
0
0
0
0
0
0
0.01
0.02
0.01
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

20
20
20
19
18
17
16
15
14
14
13
13
13
13
12
12
12
12
13
15
16
16
17
18

Feels Like (°C)

20
21
20
19
18
17
16
15
14
14
13
13
13
13
12
12
12
12
13
15
16
16
17
18

Dew Point (°C)

17
17
17
17
16
16
15
14
14
14
13
13
13
13
12
12
12
12
13
14
14
14
14
13

Relative Humidity (%)

80
82
85
88
90
93
94
95
99
100
100
100
100
100
100
100
100
100
99
94
89
85
80
74

Pressure (mb)

1014
1014
1014
1014
1014
1014
1015
1015
1015
1015
1015
1015
1016
1015
1015
1016
1015
1015
1016
1017
1017
1017
1017
1016

Ozone (du)

282
281
279
278
277
276
275
275
275
276
278
280
280
280
280
280
279
280
280
280
281
280
279
277

Forecast for De Brouckere, 1000 Brussels, Belgium (50.85,4.35)

Generated: 20/09/21 15:16:41. Forecast: 20/09/21 to 26/09/21. Timezone: UTC+2.00