Clear Outside v1.0 - International Weather Forecasts For Astronomers

Friday 25

Waxing Gibbous 99%

18:16

06:31

15 OK
16 OK
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: 06:54, Set: 18:51, Transit: 12:52. Moon - Rise: 18:16, Set: 06:31. Civil Dark: 19:25 - 06:20. Nautical Dark: 20:04 - 05:41. Astro Dark: 20:45 - 05:00

Total Clouds (% Sky Obscured)

22
34
52
63
99
99
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
58

Low Clouds (% Sky Obscured)

22
34
18
18
36
64
61
77
92
69
59
66
49
0
0
0
0
0
0
0
0
14
13
5

Medium Clouds (% Sky Obscured)

0
0
0
12
31
25
35
40
91
98
100
100
100
45
3
6
15
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

22
34
52
63
93
95
100
100
100
100
44
78
89
100
100
100
100
100
100
100
100
100
100
58

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

Precipitation Probability (%)

0
0
0
0
1
4
6
22
44
25
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
0.3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

4
6
6
4
5
8
10
10
8
8
8
7
5
4
4
4
4
4
3
4
4
4
4
4

Chance of Frost

Temperature (°C)

22
22
21
20
18
17
16
15
14
14
13
13
13
12
11
10
10
11
12
14
15
17
18
18

Feels Like (°C)

21
21
20
20
17
15
14
13
13
11
11
11
11
11
10
9
8
9
11
12
14
15
16
16

Dew Point (°C)

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

Relative Humidity (%)

56
55
56
60
64
67
68
69
67
63
63
64
63
63
70
73
74
74
69
63
55
48
40
36

Pressure (mb)

1018
1018
1018
1018
1018
1019
1019
1020
1020
1020
1020
1021
1020
1021
1021
1022
1022
1022
1023
1023
1023
1023
1023
1023

Ozone (du)

282
282
282
282
281
280
281
282
281
281
284
287
288
292
293
294
297
298
298
298
298
299
298
298

Saturday 26

Full Moon 100%

18:27

07:52

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: 06:55, Set: 18:49, Transit: 12:51. Moon - Rise: 18:27, Set: 07:52. Civil Dark: 19:23 - 06:22. Nautical Dark: 20:02 - 05:43. Astro Dark: 20:43 - 05:02

Total Clouds (% Sky Obscured)

55
91
92
100
100
84
68
55
55
51
51
72
67
80
93
96
87
72
77
83
92
93
85
94

Low Clouds (% Sky Obscured)

10
9
2
0
0
0
1
0
0
0
0
0
0
0
32
33
25
40
19
29
19
26
45
29

Medium Clouds (% Sky Obscured)

0
0
15
26
28
84
68
55
55
51
51
61
67
53
29
18
32
30
15
19
34
88
61
83

High Clouds (% Sky Obscured)

55
88
87
100
100
61
50
50
45
50
50
44
29
38
87
89
45
54
41
39
45
37
11
43

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
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
5
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)

3
3
3
2
2
1
1
4
4
4
4
4
3
3
3
3
4
4
7
9
10
11
11
12

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

17
17
17
16
15
13
13
11
10
10
9
9
9
9
9
9
9
10
13
14
16
18
19
20

Dew Point (°C)

3
2
3
4
3
2
2
4
7
8
7
6
6
6
7
8
8
9
10
11
12
13
13
11

Relative Humidity (%)

34
33
34
40
41
41
43
52
70
81
78
72
72
76
82
87
88
84
76
72
67
63
58
51

Pressure (mb)

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

Ozone (du)

297
298
297
297
297
296
296
297
297
298
297
296
296
295
295
296
297
298
298
297
295
294
293
293

Sunday 27

Waning Gibbous 98%

18:40

09:17

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: 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)

95
100
99
100
98
100
100
99
100
99
100
100
100
100
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

24
64
76
93
92
84
74
85
47
64
84
68
25
30
44
11
9
3
0
0
0
8
7
6

Medium Clouds (% Sky Obscured)

67
99
98
100
98
100
100
98
28
55
37
100
100
99
100
100
70
34
35
35
41
36
54
75

High Clouds (% Sky Obscured)

72
70
27
52
50
63
95
38
84
57
100
99
86
100
100
100
100
100
96
100
100
100
100
100

ISS Passover

Visibility (miles)

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

Precipitation Probability (%)

1
6
45
85
95
70
47
34
5
1
1
6
32
38
35
24
8
1
0
0
0
0
0
0

Precipitation Amount (mm)

0
0
0
0.6
0.7
0.2
0.2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

13
13
13
13
11
10
10
10
9
7
8
7
7
5
5
5
5
5
6
7
7
6
6
5

Chance of Frost

Temperature (°C)

22
22
21
19
18
18
17
17
17
16
16
16
15
15
15
14
13
13
13
14
15
16
17
17

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

46
44
49
64
82
88
89
89
87
93
92
89
92
95
93
89
92
90
80
70
61
56
51
47

Pressure (mb)

1012
1011
1011
1011
1011
1012
1012
1012
1013
1013
1013
1013
1013
1014
1014
1015
1016
1016
1017
1018
1018
1018
1019
1019

Ozone (du)

291
290
291
290
289
289
290
290
291
291
292
292
293
292
292
293
295
296
298
299
299
299
300
300

Monday 28

Waning Gibbous 93%

18:56

10:44

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: 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
100
100
100
100
95
98
100
100
100
98
97
95
97
98

Low Clouds (% Sky Obscured)

5
3
2
0
0
0
0
13
26
39
49
52
65
56
61
82
78
73
70
78
86
94
85
68

Medium Clouds (% Sky Obscured)

81
77
72
76
72
14
13
20
31
91
86
82
65
99
86
41
38
28
21
72
66
59
47
58

High Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
100
100
48
44
100
100
100
92
80
50
49
66

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
8
9
9
1
0
3
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
Very Light Rain
Very Light Rain
Very Light Rain
None
None
None
Light Rain
Light Rain
Very Light Rain
Light Rain
None
None

Precipitation Probability (%)

0
0
0
0
0
0
0
6
10
9
27
42
64
64
60
46
47
61
95
95
79
72
31
23

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0.3
0.3
0.3
0
0
0
1.1
0.6
0.3
0.4
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

17
17
17
16
15
14
13
13
13
13
13
14
14
15
15
16
16
17
18
18
19
21
22
22

Feels Like (°C)

15
15
15
15
13
12
11
11
11
11
12
12
13
13
14
15
15
16
17
17
19
20
21
22

Dew Point (°C)

5
5
5
6
6
8
9
10
11
11
12
12
13
14
15
15
16
16
17
18
19
20
21
21

Relative Humidity (%)

45
44
45
51
55
66
76
83
87
90
92
92
95
95
95
98
96
95
93
96
98
98
96
94

Pressure (mb)

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

Ozone (du)

301
302
304
304
305
306
307
309
308
308
306
308
306
307
306
302
301
301
300
295
294
291
290
289

Tuesday 29

Waning Gibbous 86%

19:16

12:13

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: 07:00, 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)

100
100
100
100
92
100
100
99
99
92
77
89
95
100
49
100
100
100
100
100
100
100
95
90

Low Clouds (% Sky Obscured)

70
70
39
18
11
14
12
9
5
4
4
4
5
4
3
2
16
34
55
70
70
75
53
32

Medium Clouds (% Sky Obscured)

69
25
15
61
63
82
80
97
94
74
42
49
86
100
29
100
95
96
97
98
98
99
75
51

High Clouds (% Sky Obscured)

100
100
100
100
62
100
100
99
97
83
61
83
92
60
49
58
62
83
100
99
99
99
94
90

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
8
6
4
6
8
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
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Very Light Rain

Precipitation Probability (%)

27
3
1
2
5
16
14
21
24
18
13
7
1
2
5
10
49
79
95
95
95
95
93
53

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.4
0.9
1.3
1.6
1.8
0.7
0.2

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

22
22
22
21
19
19
18
17
18
17
18
18
18
17
17
18
17
16
17
18
18
19
19
17

Dew Point (°C)

20
22
21
20
19
19
18
17
18
17
18
17
17
17
17
17
17
17
18
19
18
18
17
16

Relative Humidity (%)

84
91
95
92
95
93
93
92
93
92
93
92
92
90
92
92
90
92
95
95
91
86
81
76

Pressure (mb)

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

Ozone (du)

288
287
287
287
288
287
287
287
286
286
286
287
286
285
284
283
284
284
284
284
285
287
288
291

Wednesday 30

Waning Gibbous 76%

19:45

13:37

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: 07:02, 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)

87
78
70
65
65
65
60
63
71
74
64
61
62
68
68
73
82
91
100
100
100
99
99
99

Low Clouds (% Sky Obscured)

10
10
12
12
14
15
16
17
17
16
19
24
29
36
42
52
48
34
22
25
26
26
34
49

Medium Clouds (% Sky Obscured)

22
23
24
25
25
25
25
34
50
53
59
57
60
55
54
56
69
82
95
95
94
92
80
67

High Clouds (% Sky Obscured)

86
73
59
55
49
32
15
30
42
61
56
56
62
68
68
73
82
90
99
93
87
77
78
83

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

Precipitation Probability (%)

12
12
14
13
33
43
54
57
53
47
51
59
64
66
62
42
34
27
7
6
5
3
13
16

Precipitation Amount (mm)

0
0
0
0
0
0
0.2
0.2
0
0
0
0
0.2
0.3
0.2
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

70
66
68
71
74
77
77
79
82
83
84
84
86
87
87
87
87
83
78
73
66
61
55
55

Pressure (mb)

1013
1013
1014
1014
1015
1015
1016
1016
1016
1016
1016
1016
1016
1017
1017
1017
1017
1017
1018
1018
1018
1018
1018
1018

Ozone (du)

295
298
298
298
298
297
297
296
298
300
302
302
302
302
302
302
302
304
307
309
310
311
312
312

Thursday 1

Waning Gibbous 66%

20:28

14:47

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: 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)

99
98
98
97
98
99
100
89
78
72
70
71
77
75
73
67
72
77
77
78
76
78

Low Clouds (% Sky Obscured)

64
53
40
25
35
45
54
44
37
32
37
40
42
47
45
39
43
40
39
40
36
37

Medium Clouds (% Sky Obscured)

54
60
64
66
77
88
100
75
50
25
27
30
28
34
34
35
40
40
40
40
35
40

High Clouds (% Sky Obscured)

87
90
92
95
97
98
100
78
53
30
35
45
55
37
20
1
1
2
2
5
7
10

ISS Passover

Visibility (miles)

9
9
7
5
3
5
7
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

Precipitation Type

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

Precipitation Probability (%)

20
41
50
61
90
95
95
88
67
45
30
28
36
47
53
61
95
95
95
95
95
95

Precipitation Amount (mm)

0
0
0
0.2
0.6
0.9
1
0.6
0.3
0
0
0
0
0
0
0
0.5
0.9
1.6
1.6
1.2
1.6

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

55
55
62
68
75
79
82
86
89
89
92
90
90
90
90
90
92
84
77
72
63
57

Pressure (mb)

1017
1017
1017
1018
1018
1018
1018
1019
1019
1019
1019
1020
1020
1021
1021
1021
1022
1023
1023
1024
1024
1024

Ozone (du)

311
311
312
313
314
315
316
318
319
320
321
320
319
318
314
309
304
304
303
302
302
301

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

Generated: 25/09/26 15:53:36. Forecast: 25/09/26 to 01/10/26. Timezone: UTC+1.00