Clear Outside v1.0 - International Weather Forecasts For Astronomers

Saturday 5

Waning Crescent 28%

23:36

16:53

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

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)

37
40
34
79
43
20
19
22
44
61
88
63
78
71
89
100
100
100
84
98
74
52
71
55

Low Clouds (% Sky Obscured)

16
31
29
24
0
0
0
0
22
0
0
0
0
0
0
2
50
22
19
46
7
1
13
2

Medium Clouds (% Sky Obscured)

0
0
0
5
4
12
9
10
20
45
75
20
78
58
62
92
91
100
84
8
74
11
18
9

High Clouds (% Sky Obscured)

2
2
12
39
35
4
7
12
10
32
59
53
14
5
52
100
100
63
19
95
25
15
20
18

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
2
3
2
1
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
7
6
5
4
2
2
2
4
4
4
4
4
4
4
4
4
6
7
8
9
9
10

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

41
39
38
38
40
46
51
53
55
56
60
63
69
70
71
71
70
70
66
60
49
47
37
34

Pressure (mb)

1025
1024
1024
1024
1024
1024
1025
1025
1025
1025
1025
1025
1025
1024
1024
1023
1023
1023
1023
1023
1022
1022
1021
1020

Ozone (du)

296
296
295
295
293
293
290
287
285
284
285
284
284
285
285
285
288
290
291
290
290
291
290
292

Sunday 6

Waning Crescent 18%

00:58

17:40

14 OK
15 Good
16 Good
17 OK
18 Good
19 Bad
20 Bad
21 OK
22 OK
23 Bad
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 OK
06 OK
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)

16
7
2
14
9
50
52
22
39
100
100
100
100
85
55
48
38
100
77
100
100
100
100
100

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
2
27
29
41
41
37
50
53
36
48

Medium Clouds (% Sky Obscured)

7
3
0
0
1
0
0
1
4
4
25
98
94
79
55
22
4
0
9
21
18
0
17
21

High Clouds (% Sky Obscured)

0
0
2
10
4
50
52
18
18
100
100
100
100
5
0
0
22
100
77
100
100
100
62
90

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
1
3
0
0
0
0
0
0
0
0
0
0
0
1
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

21
23
23
23
22
22
20
19
18
17
15
16
16
16
16
15
17
17
16
18
17
17
18
18

Dew Point (°C)

8
8
8
8
8
8
7
7
7
7
8
8
8
8
9
11
14
15
15
14
13
11
11
10

Relative Humidity (%)

34
33
32
33
35
38
41
43
47
49
51
51
52
54
57
67
85
92
88
74
64
57
53
51

Pressure (mb)

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

Ozone (du)

293
293
289
287
288
288
288
292
293
293
294
295
297
298
302
299
301
300
300
300
301
300
299
299

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

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
96
93
89
83
77
74
81
90
100
81
59
34
34
43
33
37
41
42
35
32
27
46

Low Clouds (% Sky Obscured)

53
50
32
34
30
27
28
22
15
8
0
0
11
22
7
16
24
29
31
31
25
25
19
29

Medium Clouds (% Sky Obscured)

21
24
17
93
89
83
77
74
81
88
0
0
6
3
0
0
0
0
1
2
1
1
0
12

High Clouds (% Sky Obscured)

100
100
81
59
29
21
18
15
47
72
100
75
50
34
31
28
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
1
6
15
13
0
3
3
0
1
2
0
0
0
0
0
0
0
6
11
14
12

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
12
12
14
12
12
12
11
11
11
11
11
11
11
11
10
9
8
10
12
13
14
15
15

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

54
55
49
43
48
51
56
62
64
66
68
71
76
80
75
76
75
79
71
60
53
47
40
36

Pressure (mb)

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

Ozone (du)

300
300
300
299
300
300
300
301
301
303
304
306
307
311
319
316
321
322
326
329
331
328
326
327

Tuesday 8

Waning Crescent 4%

03:57

18:34

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

66
86
85
98
97
54
39
23
29
37
44
59
57
62
62
57
52
22
21
19
40
59
77
81

Low Clouds (% Sky Obscured)

43
57
50
67
60
25
23
18
19
23
19
19
16
16
17
18
17
14
14
16
17
19
23
16

Medium Clouds (% Sky Obscured)

22
21
22
14
10
4
2
1
0
0
0
0
4
4
6
10
10
2
1
0
1
2
7
6

High Clouds (% Sky Obscured)

0
0
20
47
70
44
23
2
1
1
0
0
0
0
0
0
0
0
1
1
15
31
46
54

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 (%)

7
1
1
2
0
5
4
1
3
3
0
2
2
1
3
3
3
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
16
16
15
13
13
13
12
11
10
10
10
10
9
9
9
9
10
10
11
13
12
12
12

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

33
32
33
33
40
44
54
66
70
75
75
75
77
77
80
83
83
83
71
60
51
47
44
41

Pressure (mb)

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

Ozone (du)

329
332
337
344
347
346
342
339
339
341
341
340
340
339
336
335
334
331
329
328
326
324
321
319

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)

84
85
79
72
70
80
92
100
100
100
100
100
100
100
98
96
94
85
76
69
71
75
80
84

Low Clouds (% Sky Obscured)

10
5
8
10
13
12
12
11
18
27
38
58
79
99
98
96
93
85
76
69
71
75
80
84

Medium Clouds (% Sky Obscured)

8
6
26
41
57
63
77
90
97
98
100
94
88
82
77
72
67
46
23
2
5
5
8
13

High Clouds (% Sky Obscured)

62
66
46
30
17
45
72
100
100
100
100
92
85
75
58
41
29
26
27
35
35
35
38
36

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
1
4
4
11
14
10
9
6
1
3
5
4
8
8
10
10

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

4
4
4
5
5
6
6
6
7
7
8
9
9
8
9
9
9
9
10
11
12
14
15
15

Relative Humidity (%)

40
39
38
42
45
48
53
57
62
66
71
77
76
75
75
75
77
79
80
79
79
81
81
80

Pressure (mb)

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

Ozone (du)

315
311
308
305
303
300
299
299
298
302
305
308
307
306
304
303
302
301
298
295
292
291
289
287

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
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 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)

87
89
93
96
100
94
89
83
88
92
95
94
92
91
87
80
68
75
81
82
77
74
68

Low Clouds (% Sky Obscured)

87
86
87
92
96
75
56
39
38
40
37
37
30
29
26
25
21
36
51
66
50
35
19

Medium Clouds (% Sky Obscured)

20
27
38
50
62
63
63
65
72
78
84
86
89
90
74
62
48
37
24
11
12
12
8

High Clouds (% Sky Obscured)

33
35
25
20
20
22
23
25
31
32
38
31
21
14
11
14
14
15
17
18
13
8
3

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

Fog (%)

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

Precipitation Probability (%)

8
11
14
13
9
18
18
12
12
7
2
5
7
9
11
10
5
7
9
5
9
7
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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

16
16
16
16
16
16
15
14
13
13
13
13
12
12
12
12
12
12
11
10
8
8
7

Relative Humidity (%)

82
82
84
86
88
90
88
85
82
82
83
85
82
80
79
80
80
83
72
62
53
48
42

Pressure (mb)

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

Ozone (du)

285
283
281
281
281
280
280
280
280
279
278
277
279
280
281
290
298
306
308
310
313
312
312

Friday 11

New Moon 2%

08:08

19:16

Sun - Rise: 06:31, Set: 19:24, Transit: 12:56. Moon - Rise: 08:08, Set: 19:16. Civil Dark: 19:58 - 05:57. Nautical Dark: 20:39 - 05:16. Astro Dark: 21:23 - 04:33

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

Generated: 05/09/26 14:48:53. Forecast: 05/09/26 to 11/09/26. Timezone: UTC+1.00