Clear Outside v1.0 - International Weather Forecasts For Astronomers

Friday 4

Third Quarter 39%

22:30

15:48

14 Bad
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 Bad
09 OK
10 Bad
11 Bad
12 Bad
13 OK

Sun - Rise: 06:20, Set: 19:40, Transit: 12:59. Moon - Rise: 22:30, Set: 15:48. Civil Dark: 20:15 - 05:45. Nautical Dark: 20:57 - 05:03. Astro Dark: 21:44 - 04:17

Total Clouds (% Sky Obscured)

59
68
75
100
100
100
0
0
0
0
0
4
63
64
71
97
100
83
58
43
58
67
71
30

Low Clouds (% Sky Obscured)

24
27
28
24
4
0
0
0
0
0
0
3
4
6
15
14
15
8
10
14
14
17
18
20

Medium Clouds (% Sky Obscured)

59
68
75
100
100
75
0
0
0
0
0
0
0
0
0
0
0
0
0
0
3
0
0
8

High Clouds (% Sky Obscured)

59
68
75
100
100
100
0
0
0
0
0
2
45
45
40
90
100
63
42
19
40
37
44
5

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 (%)

67
42
0
0
0
0
0
0
0
0
0
0
1
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)

14
14
13
14
12
12
11
9
8
9
9
9
8
8
8
7
7
7
8
9
10
9
9
8

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

51
43
44
45
46
50
55
60
66
71
76
77
79
81
81
84
84
83
77
69
61
51
46
41

Pressure (mb)

1014
1014
1015
1015
1015
1016
1017
1018
1018
1019
1019
1019
1020
1020
1020
1021
1022
1022
1023
1024
1024
1024
1024
1025

Ozone (du)

299
301
303
305
312
316
325
324
323
322
322
323
320
316
315
313
310
307
305
302
300
299
298
297

Saturday 5

Waning Crescent 28%

23:36

16:53

14 OK
15 OK
16 Bad
17 Bad
18 Bad
19 Bad
20 OK
21 OK
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 OK
11 Bad
12 Bad
13 Bad

Sun - Rise: 06:21, Set: 19:38, Transit: 12:59. Moon - Rise: 23:36, Set: 16:53. Civil Dark: 20:12 - 05:47. Nautical Dark: 20:55 - 05:05. Astro Dark: 21:41 - 04:20

Total Clouds (% Sky Obscured)

28
34
65
63
72
55
47
37
54
76
84
87
75
86
93
83
100
100
97
89
46
80
91
92

Low Clouds (% Sky Obscured)

20
29
31
6
5
18
9
0
0
0
0
14
3
49
46
40
8
13
41
0
0
0
2
0

Medium Clouds (% Sky Obscured)

10
6
6
3
13
16
19
25
36
36
60
87
75
86
93
83
71
28
33
32
24
15
54
69

High Clouds (% Sky Obscured)

3
3
33
55
49
29
8
6
4
33
53
27
10
4
23
24
100
100
73
30
2
34
34
35

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
6
0
2
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
7
7
6
4
3
2
2
3
3
3
3
3
4
4
5
5
6
7
8
9
10
10

Chance of Frost

Temperature (°C)

20
21
21
21
20
20
18
17
16
16
15
15
15
14
14
15
15
14
15
16
18
20
21
22

Feels Like (°C)

19
19
20
19
18
18
18
18
17
15
13
13
13
13
13
13
13
13
13
14
15
17
17
18

Dew Point (°C)

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

Relative Humidity (%)

38
36
36
36
37
44
47
49
52
53
55
59
61
64
63
63
64
68
65
55
45
34
29
29

Pressure (mb)

1025
1024
1024
1024
1024
1024
1025
1025
1025
1025
1025
1025
1025
1024
1024
1023
1023
1023
1023
1022
1022
1022
1021
1021

Ozone (du)

297
297
296
294
292
290
289
288
286
284
283
282
283
284
286
287
289
290
291
291
291
291
290
291

Sunday 6

Waning Crescent 18%

00:58

17:40

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

Sun - Rise: 06:23, Set: 19:36, Transit: 12:58. Moon - Rise: 00:58, Set: 17:40. Civil Dark: 20:10 - 05:49. Nautical Dark: 20:52 - 05:07. Astro Dark: 21:38 - 04:22

Total Clouds (% Sky Obscured)

39
39
48
41
25
65
50
58
46
70
100
100
100
46
57
83
58
58
56
79
93
97
98
100

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
2
2
35
50
58
50
42
39
50
59
50
68

Medium Clouds (% Sky Obscured)

28
10
7
9
11
5
0
0
10
20
25
65
100
46
55
83
21
18
13
11
6
2
0
5

High Clouds (% Sky Obscured)

4
31
40
41
2
15
5
58
6
16
100
100
100
30
35
0
0
9
19
52
75
86
97
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
1
0
0
0
0
0
1
2
2
0
0
0
1
0
0
4
5
3
13
18
14
17

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)

11
11
11
11
10
9
7
7
6
5
5
5
5
5
6
6
7
7
9
10
11
12
12
14

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

20
22
23
23
23
22
18
17
17
17
16
15
15
15
15
15
14
17
17
19
19
18
19
19

Dew Point (°C)

5
5
6
5
6
6
5
5
5
6
6
7
7
9
9
9
10
13
14
15
14
14
13
11

Relative Humidity (%)

30
28
28
28
29
31
35
37
41
44
46
48
50
55
57
62
64
78
78
76
69
67
58
50

Pressure (mb)

1020
1019
1018
1017
1017
1016
1016
1016
1015
1015
1015
1014
1014
1014
1014
1014
1014
1014
1014
1015
1015
1015
1015
1015

Ozone (du)

291
291
288
288
290
291
292
293
293
294
296
296
296
297
301
304
304
303
303
301
300
300
299
298

Monday 7

Waning Crescent 10%

02:28

18:12

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
03 Bad
04 Bad
05 Bad
06 Bad
07 OK
08 OK
09 OK
10 Bad
11 OK
12 Bad
13 OK

Sun - Rise: 06:25, Set: 19:33, Transit: 12:58. Moon - Rise: 02:28, Set: 18:12. Civil Dark: 20:08 - 05:50. Nautical Dark: 20:49 - 05:09. Astro Dark: 21:35 - 04:24

Total Clouds (% Sky Obscured)

100
100
100
100
100
91
81
70
77
89
100
83
65
51
58
64
66
26
20
14
49
43
52
41

Low Clouds (% Sky Obscured)

41
26
16
8
0
6
13
19
24
24
25
23
23
27
27
18
16
14
13
12
42
17
18
17

Medium Clouds (% Sky Obscured)

14
100
27
28
96
91
81
70
77
89
98
83
65
6
4
2
2
1
1
0
6
7
7
3

High Clouds (% Sky Obscured)

100
100
100
100
100
72
43
17
50
75
100
78
60
44
48
51
50
2
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 (%)

11
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
3

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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

11
9
8
7
7
8
8
8
8
9
10
10
10
10
10
10
8
8
8
7
7
6
4
3

Relative Humidity (%)

51
44
43
42
45
51
55
57
59
63
67
68
71
75
79
78
71
73
69
58
55
48
39
35

Pressure (mb)

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

Ozone (du)

299
299
301
301
300
300
300
299
300
301
301
302
304
306
310
315
320
323
327
331
335
336
338
337

Tuesday 8

Waning Crescent 4%

03:57

18:34

14 OK
15 OK
16 OK
17 OK
18 Bad
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 OK
11 Bad
12 Bad
13 Bad

Sun - Rise: 06:26, Set: 19:31, Transit: 12:58. Moon - Rise: 03:57, Set: 18:34. Civil Dark: 20:05 - 05:52. Nautical Dark: 20:47 - 05:11. Astro Dark: 21:32 - 04:26

Total Clouds (% Sky Obscured)

31
28
19
17
51
10
4
0
4
7
11
13
14
16
18
15
9
8
9
10
36
62
88
92

Low Clouds (% Sky Obscured)

16
19
13
11
51
8
2
0
2
3
4
6
7
8
7
6
6
7
6
6
11
14
19
13

Medium Clouds (% Sky Obscured)

2
2
0
0
0
0
0
0
0
0
0
0
0
0
5
8
7
1
1
0
0
0
0
1

High Clouds (% Sky Obscured)

0
0
0
1
1
0
0
0
0
0
0
0
0
0
0
0
1
1
2
3
15
28
40
68

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
3
2
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)

16
17
16
14
14
13
11
9
9
9
9
9
9
8
8
8
8
8
9
11
13
13
13
13

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

3
5
4
2
2
3
4
4
5
6
7
8
8
8
8
8
8
8
7
7
6
6
5
5

Relative Humidity (%)

35
38
35
32
34
37
44
50
56
64
73
79
80
81
83
84
84
84
75
65
57
52
47
42

Pressure (mb)

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

Ozone (du)

336
336
337
337
338
339
340
342
340
340
339
336
334
332
330
328
325
323
321
318
316
313
311
309

Wednesday 9

Waning Crescent 1%

05:24

18:51

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
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad

Sun - Rise: 06:28, Set: 19:29, Transit: 12:57. Moon - Rise: 05:24, Set: 18:51. Civil Dark: 20:03 - 05:54. Nautical Dark: 20:44 - 05:13. Astro Dark: 21:29 - 04:28

Total Clouds (% Sky Obscured)

95
99
98
93
81
85
93
100
100
100
100
100
100
100
99
98
98
95
91
90
83
75
67
76

Low Clouds (% Sky Obscured)

8
3
3
3
3
1
2
3
36
68
100
100
100
100
99
98
98
95
91
90
83
75
65
72

Medium Clouds (% Sky Obscured)

1
2
34
67
81
85
80
61
74
87
100
99
98
97
90
81
72
51
30
7
6
6
5
7

High Clouds (% Sky Obscured)

76
70
58
48
46
55
77
100
100
100
100
98
98
98
96
94
91
81
70
60
40
19
0
21

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
2
10
14
17
23
23
21
26
31
38
36
33
28
25
22
16
13

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)

13
13
13
12
11
10
9
8
7
8
9
9
10
11
12
12
11
10
10
10
9
9
10
11

Chance of Frost

Temperature (°C)

18
18
18
18
17
17
16
15
14
14
13
13
13
13
13
13
13
14
15
15
16
18
20
22

Feels Like (°C)

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

Dew Point (°C)

5
5
5
6
7
8
8
8
8
8
9
9
9
10
10
11
11
12
13
14
15
13
12
10

Relative Humidity (%)

42
41
40
45
49
55
58
62
67
69
72
75
76
79
82
84
87
92
92
92
92
72
58
45

Pressure (mb)

1015
1015
1015
1014
1014
1014
1014
1014
1014
1014
1013
1013
1012
1012
1011
1011
1011
1011
1011
1011
1011
1011
1011
1011

Ozone (du)

306
303
300
297
295
292
291
291
290
290
291
291
293
294
296
298
301
303
305
307
309
310
311
312

Thursday 10

Waning Crescent 0%

06:48

19:04

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
03 Bad
04 Bad
05 Bad
06 Bad

Sun - Rise: 06:30, Set: 19:26, Transit: 12:57. Moon - Rise: 06:48, Set: 19:04. Civil Dark: 20:00 - 05:56. Nautical Dark: 20:42 - 05:14. Astro Dark: 21:26 - 04:31

Total Clouds (% Sky Obscured)

84
92
94
97
100
96
91
87
85
83
83
85
85
87
91
95
99

Low Clouds (% Sky Obscured)

80
87
84
83
84
63
44
25
21
21
18
18
19
36
39
42
46

Medium Clouds (% Sky Obscured)

8
5
9
14
18
16
13
9
8
10
12
25
36
45
59
72
86

High Clouds (% Sky Obscured)

37
36
13
14
25
27
62
67
57
48
35
29
24
16
20
23
27

ISS Passover

Visibility (miles)

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

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

10
1
2
2
0
4
4
0
1
4
0
2
1
0
4
6
5

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

22
22
21
21
20
19
18
17
16
16
15
15
15
15
15
15
14

Feels Like (°C)

22
20
19
19
19
19
15
15
15
15
15
14
13
14
14
14
14

Dew Point (°C)

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

Relative Humidity (%)

46
47
47
50
54
57
64
71
79
82
83
86
86
87
86
84
84

Pressure (mb)

1011
1011
1012
1012
1012
1013
1013
1014
1015
1015
1015
1015
1015
1016
1016
1016
1016

Ozone (du)

310
308
307
305
304
303
301
300
298
297
295
294
293
292
291
292
292

Forecast for Welwyn Garden City, Hertfordshire, United Kingdom (51.80,-0.21)

Generated: 04/09/26 14:02:04. Forecast: 04/09/26 to 10/09/26. Timezone: UTC+1.00