Clear Outside v1.0 - International Weather Forecasts For Astronomers

Sunday 27

Waning Gibbous 98%

18:40

09:17

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
15 Bad
16 Bad
17 Bad

Sun - Rise: 06:57, Set: 18:47, Transit: 12:51. Moon - Rise: 18:40, Set: 09:17. Civil Dark: 19:20 - 06:24. Nautical Dark: 19:59 - 05:45. Astro Dark: 20:40 - 05:04

Total Clouds (% Sky Obscured)

73
79
84
87
100
96
98
96
100
100
100
100
100
100
100
97
93
96
100
100
99
100
100
100

Low Clouds (% Sky Obscured)

69
57
38
15
11
24
13
7
12
4
0
0
0
3
0
0
0
0
10
0
0
0
0
7

Medium Clouds (% Sky Obscured)

73
79
80
54
39
70
53
66
55
99
100
100
96
65
80
92
92
85
98
99
82
76
91
94

High Clouds (% Sky Obscured)

68
79
69
44
99
40
80
83
100
100
100
100
100
100
100
91
74
76
100
100
91
100
100
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
1
3
2
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 (%)

64
19
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

16
16
15
13
13
12
12
12
11
10
10
10
10
9
9
11
12
13
15
15
15
15
15
15

Dew Point (°C)

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

Relative Humidity (%)

76
79
83
77
82
87
90
89
90
89
87
83
83
81
79
72
66
61
54
49
44
42
43
45

Pressure (mb)

1012
1012
1013
1014
1015
1016
1017
1017
1018
1018
1019
1019
1019
1020
1020
1021
1021
1021
1021
1021
1020
1020
1020
1020

Ozone (du)

292
292
292
292
291
291
292
292
292
292
291
292
292
292
293
295
296
297
297
299
300
300
301
301

Monday 28

Waning Gibbous 93%

18:56

10:44

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
15 Bad
16 Bad
17 Bad

Sun - Rise: 06:59, Set: 18:45, Transit: 12:50. Moon - Rise: 18:56, Set: 10:44. Civil Dark: 19:18 - 06:25. Nautical Dark: 19:57 - 05:46. Astro Dark: 20:37 - 05:06

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
98
91
96
94
97
93
94
84
65
66
62
100
100
56

Low Clouds (% Sky Obscured)

3
0
5
24
69
86
92
97
95
90
82
67
92
88
93
78
77
77
65
66
62
75
67
32

Medium Clouds (% Sky Obscured)

76
99
100
100
97
100
100
100
100
100
53
38
29
24
31
25
29
18
5
0
0
0
0
4

High Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
65
70
11
2
2
7
4
4
5
2
5
100
100
52

ISS Passover

Visibility (miles)

9
9
9
9
7
3
8
7
8
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
Light Rain
Light Rain
Very Light Rain
Light Rain
Very Light Rain
Very Light Rain
None
Very Light Rain
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

1
10
17
54
95
95
88
95
77
67
47
50
49
26
6
0
0
0
0
0
0
0
0
0

Precipitation Amount (mm)

0
0
0
0
0.9
1
0.3
0.5
0.3
0.3
0
0.2
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

17
16
15
14
14
14
14
14
14
14
15
15
15
15
16
17
18
19
21
22
23
24
24
24

Feels Like (°C)

14
12
12
12
12
13
12
12
12
13
13
13
14
14
14
16
17
19
20
22
23
24
23
22

Dew Point (°C)

8
8
9
10
11
13
13
13
13
14
14
14
14
14
15
16
16
17
18
18
20
20
21
21

Relative Humidity (%)

52
61
70
75
83
93
95
95
93
96
93
93
95
93
95
93
92
86
82
79
81
80
82
83

Pressure (mb)

1020
1020
1020
1020
1020
1020
1019
1018
1018
1018
1017
1016
1016
1016
1016
1016
1015
1015
1015
1014
1014
1013
1013
1012

Ozone (du)

302
303
304
306
305
305
305
305
307
309
315
308
304
301
301
300
298
298
298
298
296
295
294
293

Tuesday 29

Waning Gibbous 86%

19:16

12:13

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

Sun - Rise: 07:00, Set: 18:42, Transit: 12:50. Moon - Rise: 19:16, Set: 12:13. Civil Dark: 19:16 - 06:27. Nautical Dark: 19:55 - 05:48. Astro Dark: 20:35 - 05:08

Total Clouds (% Sky Obscured)

17
22
18
54
33
51
54
47
89
100
100
100
100
100
100
100
100
100
95
96
53
71
35
25

Low Clouds (% Sky Obscured)

0
3
0
0
0
0
0
3
17
40
71
57
40
64
77
85
94
88
75
78
35
50
23
19

Medium Clouds (% Sky Obscured)

5
4
4
2
4
5
7
47
88
92
93
100
97
100
51
36
53
40
49
22
20
36
18
9

High Clouds (% Sky Obscured)

13
18
15
54
26
39
50
47
51
100
100
100
100
100
70
100
100
95
64
45
23
2
0
0

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
4
5
6
9
9
7
5
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
Very Light Rain
None
Very Light Rain
Light Rain
Light Rain
Very Light Rain
Light Rain
None
None
None
None
None
None

Precipitation Probability (%)

0
0
0
0
0
0
0
1
3
9
61
84
67
67
77
73
65
94
52
24
16
0
0
0

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0.3
0
0.2
0.6
0.5
0.3
0.9
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

23
21
20
19
19
19
19
19
19
19
18
18
19
19
19
19
19
19
19
20
20
21
22
21

Feels Like (°C)

21
21
20
19
19
17
17
17
17
16
16
16
16
17
17
17
16
17
17
17
18
19
19
19

Dew Point (°C)

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

Relative Humidity (%)

85
91
91
88
85
82
81
81
80
81
82
86
92
92
92
92
91
86
89
70
70
54
57
57

Pressure (mb)

1013
1013
1012
1012
1012
1011
1010
1010
1009
1009
1009
1009
1009
1009
1009
1009
1010
1010
1011
1011
1011
1011
1012
1012

Ozone (du)

291
289
288
287
286
285
283
281
280
278
277
276
277
277
279
280
279
281
282
283
283
284
287
289

Wednesday 30

Waning Gibbous 76%

19:45

13:37

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

Sun - Rise: 07:02, Set: 18:40, Transit: 12:50. Moon - Rise: 19:45, Set: 13:37. Civil Dark: 19:13 - 06:29. Nautical Dark: 19:52 - 05:50. Astro Dark: 20:32 - 05:10

Total Clouds (% Sky Obscured)

20
24
14
14
17
56
27
34
36
44
88
79
68
60
27
19
20
19
18
20
22
40
60
74

Low Clouds (% Sky Obscured)

16
15
12
10
14
19
24
31
36
44
44
70
41
31
26
19
18
16
15
12
10
7
9
13

Medium Clouds (% Sky Obscured)

6
14
1
4
3
54
3
3
3
3
59
49
42
39
3
0
0
0
0
2
3
8
43
66

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2
4
23
25
60

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
8
9
7
0
1
1
6
7
3
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

57
63
66
69
73
79
80
79
78
80
82
82
80
84
83
74
64
55
48
45
42
39
38
41

Pressure (mb)

1013
1014
1014
1015
1015
1016
1016
1016
1017
1017
1018
1018
1019
1020
1021
1022
1022
1023
1023
1024
1024
1024
1024
1024

Ozone (du)

289
288
289
290
295
296
294
296
297
299
301
305
308
311
311
316
315
312
305
301
299
296
294
294

Thursday 1

Waning Gibbous 66%

20:28

14:47

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

Sun - Rise: 07:04, Set: 18:38, Transit: 12:50. Moon - Rise: 20:28, Set: 14:47. Civil Dark: 19:11 - 06:30. Nautical Dark: 19:50 - 05:51. Astro Dark: 20:30 - 05:11

Total Clouds (% Sky Obscured)

54
22
18
20
25
34
39
70
96
94
93
92
91
69
52
34
53
74
95
97
98
100
92
87

Low Clouds (% Sky Obscured)

16
9
4
0
1
1
2
5
9
16
21
24
28
36
29
23
24
31
37
51
66
80
67
53

Medium Clouds (% Sky Obscured)

35
3
0
0
0
0
0
2
6
5
9
76
19
3
3
4
2
1
0
0
0
0
4
7

High Clouds (% Sky Obscured)

3
6
10
11
14
17
24
65
89
85
71
60
45
49
29
12
36
60
86
80
75
70
68
65

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
1
1
0
0
0
0
0
0
0
1
2
0
2
3
3
12
14
14
13
11

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

6
7
8
9
8
8
8
8
8
8
9
8
8
8
9
9
9
10
10
11
11
12
13
13

Relative Humidity (%)

46
53
60
68
70
72
75
76
75
76
77
75
74
75
69
66
62
60
57
55
57
61
64
68

Pressure (mb)

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

Ozone (du)

294
296
297
299
301
303
303
301
302
302
303
306
308
308
307
305
304
303
302
301
300
299
298
298

Friday 2

Waning Gibbous 54%

21:28

15:39

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
15 Bad
16 Bad
17 Bad

Sun - Rise: 07:05, Set: 18:35, Transit: 12:49. Moon - Rise: 21:28, Set: 15:39. Civil Dark: 19:09 - 06:32. Nautical Dark: 19:48 - 05:53. Astro Dark: 20:28 - 05:13

Total Clouds (% Sky Obscured)

83
80
77
71
79
88
94
94
94
94
93
91
89
80
71
58
59
60
53
58
62
64
70
76

Low Clouds (% Sky Obscured)

42
30
17
5
10
15
19
20
24
28
27
25
24
22
15
9
9
9
8
5
5
6
4
3

Medium Clouds (% Sky Obscured)

11
15
19
23
27
41
41
47
44
45
33
27
25
17
8
0
0
0
0
1
2
3
17
34

High Clouds (% Sky Obscured)

68
75
74
69
74
77
83
86
90
94
72
51
29
34
38
39
39
38
42
45
44
43
55
70

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 (%)

8
6
5
1
1
4
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
4
4
3
3
3
3
3
4
3
3
3
4
5
6
6
7
7
7
7
7
7

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

71
74
75
78
79
83
84
87
89
90
90
92
92
92
82
73
65
59
55
50
49
48
47
51

Pressure (mb)

1029
1029
1029
1029
1029
1029
1029
1029
1029
1028
1028
1028
1028
1027
1027
1027
1027
1026
1026
1025
1024
1024
1023
1023

Ozone (du)

297
297
297
296
296
296
296
295
295
295
295
294
294
294
294
294
294
293
293
292
292
291
290
290

Saturday 3

Third Quarter 42%

22:45

16:15

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: 07:07, Set: 18:33, Transit: 12:49. Moon - Rise: 22:45, Set: 16:15. Civil Dark: 19:06 - 06:34. Nautical Dark: 19:45 - 05:55. Astro Dark: 20:25 - 05:15

Total Clouds (% Sky Obscured)

82
84
84
86
90
95
100
100
100
100
100
100
100
85
69
53
51
52
50

Low Clouds (% Sky Obscured)

0
0
0
0
8
19
30
29
25
20
24
34
52
51
57
53
51
52
50

Medium Clouds (% Sky Obscured)

56
67
77
86
85
83
80
83
90
100
98
97
95
85
69
53
51
52
50

High Clouds (% Sky Obscured)

82
77
74
72
84
93
100
100
100
100
100
100
100
80
60
45
45
45
45

ISS Passover

Visibility (miles)

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

Fog (%)

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
Very Light Rain
Very Light Rain
None

Precipitation Probability (%)

0
0
0
0
0
0
0
3
2
0
10
10
7
53
58
50
62
67
57

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.3
0.3
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

18
17
16
15
14
14
14
14
14
14
13
13
13
13
14
15
15
16
17

Feels Like (°C)

18
18
14
14
13
14
13
13
12
12
12
12
12
12
12
13
14
15
16

Dew Point (°C)

9
10
10
10
10
11
11
11
11
11
11
11
10
10
11
13
14
15
16

Relative Humidity (%)

56
63
67
73
78
80
82
83
83
83
84
83
83
83
86
87
92
93
93

Pressure (mb)

1023
1023
1023
1023
1023
1023
1022
1022
1022
1021
1021
1021
1021
1021
1022
1022
1022
1022
1022

Ozone (du)

290
290
291
291
292
293
294
295
295
296
297
296
295
294
295
295
295
296
297

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

Generated: 27/09/26 18:52:46. Forecast: 27/09/26 to 03/10/26. Timezone: UTC+1.00