Clear Outside v1.0 - International Weather Forecasts For Astronomers

Monday 28

Waning Gibbous 96%

19:01

09:10

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

Sun - Rise: 06:58, Set: 18:46, Transit: 12:52. Moon - Rise: 19:01, Set: 09:10. Civil Dark: 19:18 - 06:25. Nautical Dark: 19:56 - 05:48. Astro Dark: 20:35 - 05:09

Total Clouds (% Sky Obscured)

7
4
5
1
11
28
28
36
45
44
49
50
45
41
58
66
62
59
51
42
40
40
28
36

Low Clouds (% Sky Obscured)

7
4
5
0
11
23
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

7
4
0
1
2
19
28
36
42
28
30
25
20
12
2
2
2
3
2
1
0
0
0
0

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
1
24
26
38
38
29
29
53
62
57
50
41
37
34
39
26
34

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)

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

Chance of Frost

Temperature (°C)

12
11
10
9
9
8
9
11
14
16
18
19
21
22
22
22
21
18
16
15
14
13
12
12

Feels Like (°C)

11
11
10
9
9
8
9
11
13
14
17
18
19
20
21
20
19
17
14
13
12
11
10
10

Dew Point (°C)

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

Relative Humidity (%)

73
73
76
77
77
78
73
60
51
45
41
37
34
33
32
35
44
50
54
53
55
58
62
64

Pressure (mb)

1025
1024
1024
1024
1025
1025
1025
1025
1025
1025
1025
1024
1023
1023
1023
1022
1023
1023
1024
1024
1024
1025
1025
1025

Ozone (du)

283
283
282
281
281
280
280
280
280
280
279
279
278
277
277
276
276
276
276
277
278
279
278
278

Tuesday 29

Waning Gibbous 93%

19:24

10:35

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

Sun - Rise: 06:59, Set: 18:44, Transit: 12:52. Moon - Rise: 19:24, Set: 10:35. Civil Dark: 19:16 - 06:27. Nautical Dark: 19:54 - 05:49. Astro Dark: 20:33 - 05:11

Total Clouds (% Sky Obscured)

22
39
38
55
78
79
34
44
39
48
53
56
35
12
8
20
12
6
3
4
3
3
3
2

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)

22
39
36
55
78
79
34
44
39
48
51
51
27
6
3
12
7
4
2
2
2
2
2
2

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)

4
4
5
5
5
4
4
6
7
9
11
12
14
14
13
13
11
8
8
8
7
6
6
6

Chance of Frost

Temperature (°C)

11
10
10
10
9
9
10
12
15
18
20
21
23
23
23
23
21
18
16
15
14
13
12
11

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

66
67
69
68
69
70
66
56
46
39
34
31
28
28
28
30
36
42
47
49
51
54
56
58

Pressure (mb)

1025
1026
1026
1026
1026
1026
1026
1026
1027
1026
1026
1025
1025
1024
1024
1024
1025
1025
1026
1026
1026
1026
1026
1026

Ozone (du)

278
278
278
279
280
281
282
281
281
281
281
281
281
281
281
282
282
282
282
282
282
281
281
281

Wednesday 30

Waning Gibbous 86%

19:55

12:01

02 Good
03 Good
04 Good
05 Good
06 Good
07 Good
08 Good
09 Good
10 OK
11 Good
12 OK
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

Sun - Rise: 07:01, Set: 18:42, Transit: 12:51. Moon - Rise: 19:55, Set: 12:01. Civil Dark: 19:14 - 06:28. Nautical Dark: 19:52 - 05:51. Astro Dark: 20:30 - 05:12

Total Clouds (% Sky Obscured)

3
3
3
3
2
2
4
16
35
13
43
51
67
84
100
96
99
100
98
97
96
97
98
100

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)

3
2
2
2
2
2
3
16
35
10
29
43
62
81
100
96
99
100
98
97
96
97
98
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
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
7
6
6
6
6
7
9
10
11
11
12
12
11
10
9
8
8
7
6
5
5
5
5

Chance of Frost

Temperature (°C)

11
10
10
9
9
9
10
12
14
17
19
22
23
23
23
22
20
18
17
15
14
13
12
12

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

58
58
58
58
60
62
61
52
43
36
32
30
28
28
28
32
38
43
46
47
50
51
55
56

Pressure (mb)

1026
1026
1026
1026
1026
1026
1026
1026
1026
1026
1025
1025
1024
1024
1023
1023
1023
1024
1024
1025
1025
1025
1025
1025

Ozone (du)

281
281
281
282
282
283
284
283
283
283
283
282
282
282
282
283
283
283
282
281
282
282
282
281

Thursday 1

Waning Gibbous 77%

20:39

13:23

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
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad
01 Bad

Sun - Rise: 07:02, Set: 18:40, Transit: 12:51. Moon - Rise: 20:39, Set: 13:23. Civil Dark: 19:12 - 06:30. Nautical Dark: 19:50 - 05:52. Astro Dark: 20:28 - 05:14

Total Clouds (% Sky Obscured)

100
100
100
91
81
72
75
78
80
80
81
83
75
76
80
80
79
85
88
94
99
99
99
99

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
2
3
3
4
5
12
57
49
48

High Clouds (% Sky Obscured)

100
100
100
91
81
72
75
78
80
80
81
83
73
75
78
77
77
83
86
93
98
98
98
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
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)

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

Chance of Frost

Temperature (°C)

11
11
10
10
10
9
10
12
14
16
18
19
21
22
22
22
20
18
16
15
14
14
13
12

Feels Like (°C)

9
8
8
8
8
8
8
10
12
14
16
18
19
21
21
22
19
17
15
14
13
12
12
11

Dew Point (°C)

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

Relative Humidity (%)

60
61
64
66
68
68
66
57
50
44
39
35
32
31
31
33
40
45
47
49
51
53
56
59

Pressure (mb)

1025
1025
1025
1025
1025
1026
1026
1026
1026
1026
1026
1026
1025
1025
1025
1025
1025
1025
1026
1026
1027
1027
1027
1028

Ozone (du)

280
280
280
280
280
280
281
281
281
281
281
280
280
279
278
277
277
278
278
278
278
277
276
277

Friday 2

Waning Gibbous 66%

21:39

14:34

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
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad
01 Bad

Sun - Rise: 07:04, Set: 18:38, Transit: 12:51. Moon - Rise: 21:39, Set: 14:34. Civil Dark: 19:10 - 06:32. Nautical Dark: 19:47 - 05:54. Astro Dark: 20:26 - 05:16

Total Clouds (% Sky Obscured)

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

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
11
21
32
35
42
46
41
38
36

Medium Clouds (% Sky Obscured)

32
34
25
29
34
55
59
58
53
44
31
21
23
27
31
29
30
31
26
19
10
7
3
0

High Clouds (% Sky Obscured)

97
98
98
98
99
96
97
99
99
99
99
98
98
99
100
98
97
96
88
80
77
76
75
74

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
1
2
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

10
9
9
9
8
8
8
9
10
10
11
11
12
19
18
18
18
18
19
12
13
13
13
13

Dew Point (°C)

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

Relative Humidity (%)

60
63
62
65
65
65
62
54
47
40
36
31
28
28
28
28
33
37
43
45
47
50
52
55

Pressure (mb)

1028
1028
1028
1029
1029
1029
1030
1030
1030
1030
1030
1030
1030
1030
1030
1029
1030
1030
1031
1031
1031
1031
1031
1031

Ozone (du)

277
276
277
277
278
278
278
278
278
278
279
279
280
280
280
280
280
280
280
280
281
281
280
280

Saturday 3

Third Quarter 54%

22:54

15:27

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

Sun - Rise: 07:05, Set: 18:35, Transit: 12:50. Moon - Rise: 22:54, Set: 15:27. Civil Dark: 19:08 - 06:33. Nautical Dark: 19:45 - 05:56. Astro Dark: 20:23 - 05:17

Total Clouds (% Sky Obscured)

90
90
90
88
87
90
74
51
29
18
14
9
7
4
1
0
0
0
0
0
0
0
0
0

Low Clouds (% Sky Obscured)

40
43
50
64
74
85
58
33
5
3
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
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

73
72
56
34
19
10
10
14
17
17
14
9
7
4
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
2
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)

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

Chance of Frost

Temperature (°C)

13
13
12
12
12
11
11
12
14
16
17
19
21
21
21
22
19
17
15
14
13
12
11
10

Feels Like (°C)

13
10
10
10
10
9
9
8
8
8
9
11
13
20
19
19
18
18
18
11
12
12
12
11

Dew Point (°C)

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

Relative Humidity (%)

57
59
61
64
64
64
64
54
45
38
34
29
25
26
27
29
32
36
42
44
46
48
50
51

Pressure (mb)

1032
1031
1031
1031
1032
1032
1032
1032
1032
1032
1031
1030
1029
1029
1028
1028
1028
1028
1028
1028
1028
1028
1028
1028

Ozone (du)

280
280
280
280
281
281
282
282
283
283
284
284
284
285
285
285
285
286
286
286
286
286
287
287

Sunday 4

Waning Crescent 42%

00:17

16:06

Sun - Rise: 07:07, Set: 18:33, Transit: 12:50. Moon - Rise: 00:17, Set: 16:06. Civil Dark: 19:05 - 06:35. Nautical Dark: 19:43 - 05:57. Astro Dark: 20:21 - 05:19

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 Letňany, Praha 18, Czech Republic (50.14,14.52)

Generated: 28/09/26 02:02:56. Forecast: 28/09/26 to 04/10/26. Timezone: UTC+2.00