Clear Outside v1.0 - International Weather Forecasts For Astronomers

Saturday 22

Waxing Gibbous 75%

17:38

00:10

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

Sun - Rise: 05:57, Set: 20:09, Transit: 13:03. Moon - Rise: 17:38, Set: 00:10. Civil Dark: 20:45 - 05:21. Nautical Dark: 21:31 - 04:35. Astro Dark: 22:24 - 03:42

Total Clouds (% Sky Obscured)

46
41
31
22
15
16
14
30
36
24
16
46
43
43
56
46
44
18
3
5
2
2
1
0

Low Clouds (% Sky Obscured)

6
11
3
12
11
11
10
21
28
24
16
26
15
17
26
17
26
18
3
5
2
2
1
0

Medium Clouds (% Sky Obscured)

12
10
6
0
0
0
0
0
0
0
0
19
20
20
27
26
22
5
0
0
0
0
0
0

High 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

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 (%)

1
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)

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

Chance of Frost

Temperature (°C)

12
12
11
10
10
10
12
14
16
17
18
19
20
20
21
21
20
19
18
16
15
14
14
13

Feels Like (°C)

11
11
10
10
9
9
10
12
14
15
16
17
18
19
19
18
18
17
16
15
14
14
14
13

Dew Point (°C)

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

Relative Humidity (%)

81
83
83
84
82
77
63
55
48
43
39
35
33
32
31
31
32
38
47
53
54
55
57
60

Pressure (mb)

1019
1019
1020
1020
1021
1021
1022
1023
1023
1023
1023
1023
1023
1023
1023
1023
1023
1023
1024
1024
1024
1025
1025
1025

Ozone (du)

363
363
362
362
361
360
359
360
359
360
361
361
361
362
362
362
362
360
359
358
359
360
360
359

Sunday 23

Waxing Gibbous 83%

18:21

01:13

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

Sun - Rise: 05:59, Set: 20:07, Transit: 13:03. Moon - Rise: 18:21, Set: 01:13. Civil Dark: 20:43 - 05:23. Nautical Dark: 21:29 - 04:37. Astro Dark: 22:21 - 03:45

Total Clouds (% Sky Obscured)

0
7
16
13
7
34
50
48
51
45
57
66
55
52
55
53
37
25
15
6
2
3
5
39

Low Clouds (% Sky Obscured)

0
4
11
9
4
20
31
32
35
0
0
13
0
2
3
0
0
1
1
0
0
0
0
2

Medium Clouds (% Sky Obscured)

0
2
5
2
4
5
8
0
0
25
38
35
40
34
37
38
25
18
10
3
0
0
0
0

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2
0
2
2
2
2
5
39

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
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)

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

Chance of Frost

Temperature (°C)

12
12
12
12
11
12
13
16
18
20
21
22
23
23
23
23
23
22
20
17
16
15
14
13

Feels Like (°C)

13
13
13
13
13
13
14
16
19
20
21
22
23
24
23
23
22
21
19
16
15
15
14
13

Dew Point (°C)

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

Relative Humidity (%)

63
66
67
71
75
71
62
56
51
44
38
34
30
27
27
25
26
29
42
57
62
65
66
71

Pressure (mb)

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

Ozone (du)

358
358
358
359
356
352
349
347
346
346
345
345
344
342
341
340
339
338
336
334
333
333
333
333

Monday 24

Waxing Gibbous 90%

18:51

No Set

02 OK
03 Bad
04 Good
05 OK
06 OK
07 OK
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: 06:01, Set: 20:05, Transit: 13:03. Moon - Rise: 18:51, Set: No Set. Civil Dark: 20:41 - 05:24. Nautical Dark: 21:26 - 04:39. Astro Dark: 22:18 - 03:48

Total Clouds (% Sky Obscured)

44
60
7
35
46
37
95
100
85
82
100
99
98
96
100
99
95
94
79
78
97
94
92
90

Low Clouds (% Sky Obscured)

2
0
0
0
16
16
29
30
48
31
34
21
0
0
0
0
0
4
8
12
9
4
0
0

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
10
14
66
65
85
71
31
34
32
27
24
49
51

High Clouds (% Sky Obscured)

44
60
7
33
29
21
94
99
70
63
100
99
96
84
100
97
78
92
72
77
95
91
89
76

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
2

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

Chance of Frost

Temperature (°C)

13
12
12
12
12
12
14
17
18
20
21
22
22
22
22
21
20
19
18
17
16
16
15
15

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

75
79
81
83
86
81
67
56
47
42
38
37
37
38
39
43
47
52
61
69
79
85
87
89

Pressure (mb)

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

Ozone (du)

335
335
334
330
326
324
323
324
324
324
323
324
324
325
324
322
320
319
319
320
321
320
320
321

Tuesday 25

Waxing Gibbous 95%

19:14

02:25

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

Sun - Rise: 06:02, Set: 20:02, Transit: 13:02. Moon - Rise: 19:14, Set: 02:25. Civil Dark: 20:38 - 05:26. Nautical Dark: 21:23 - 04:41. Astro Dark: 22:14 - 03:50

Total Clouds (% Sky Obscured)

87
85
86
88
90
90
90
90
89
88
86
90
95
98
91
82
46
47
46
97
92
82
54
49

Low Clouds (% Sky Obscured)

0
0
5
10
13
19
26
30
26
26
22
22
37
58
51
43
13
16
16
16
18
17
19
11

Medium Clouds (% Sky Obscured)

23
53
86
88
85
90
90
90
89
88
86
86
85
72
39
24
22
25
25
25
60
71
39
16

High Clouds (% Sky Obscured)

63
55
55
55
50
41
37
38
32
36
55
73
85
43
46
49
40
37
34
91
83
64
10
25

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 (%)

2
0
4
3
0
2
0
0
0
1
2
0
0
0
1
1
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
11
11
11
10
10
11
12
13
13
12
12
11
10
10
10
10
10
9
7
6
6
4
4

Chance of Frost

Temperature (°C)

15
15
15
15
16
16
17
18
20
21
22
23
24
24
24
23
22
22
20
18
17
17
16
15

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

90
90
90
87
85
83
78
66
55
49
50
44
43
36
39
46
42
43
54
69
78
85
87
90

Pressure (mb)

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

Ozone (du)

322
324
323
322
321
320
320
320
319
319
319
319
322
327
326
325
323
320
317
315
312
312
313
315

Wednesday 26

Waxing Gibbous 99%

19:31

03:41

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: 06:04, Set: 20:00, Transit: 13:02. Moon - Rise: 19:31, Set: 03:41. Civil Dark: 20:36 - 05:28. Nautical Dark: 21:21 - 04:43. Astro Dark: 22:11 - 03:53

Total Clouds (% Sky Obscured)

86
86
99
99
100
100
100
100
97
98
100
100
100
100
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

31
44
64
65
55
57
65
69
59
65
80
85
89
91
91
90
87
70
50
32
22
13
4
4

Medium Clouds (% Sky Obscured)

56
4
8
11
14
14
15
23
21
28
35
33
31
25
29
46
61
44
32
20
29
40
48
53

High Clouds (% Sky Obscured)

36
54
98
99
100
100
100
100
66
77
100
93
86
74
66
57
51
69
86
99
100
100
100
98

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

Precipitation Probability (%)

1
0
0
0
3
11
13
12
47
57
60
95
88
91
82
74
69
64
52
14
46
61
70
90

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0.2
0.3
0.3
0.7
0.6
0.8
0.6
0.5
0.4
0.4
0.2
0
0
0.3
0.4
0.6

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

15
15
15
15
16
16
17
19
20
22
23
24
24
24
25
23
22
21
20
19
18
18
18
18

Feels Like (°C)

16
15
14
14
15
15
16
18
20
21
22
23
22
22
22
23
23
24
17
18
19
19
18
19

Dew Point (°C)

14
14
13
13
13
13
14
15
16
15
15
14
13
11
10
12
13
14
14
15
15
15
15
15

Relative Humidity (%)

92
92
90
85
85
82
81
78
77
65
60
54
49
44
39
47
55
67
70
75
80
80
81
83

Pressure (mb)

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

Ozone (du)

315
315
315
315
316
319
320
319
317
315
315
317
317
318
318
318
318
317
318
319
319
320
320
320

Thursday 27

Waxing Gibbous 100%

19:45

04:58

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: 06:05, Set: 19:58, Transit: 13:02. Moon - Rise: 19:45, Set: 04:58. Civil Dark: 20:34 - 05:30. Nautical Dark: 21:18 - 04:45. Astro Dark: 22:08 - 03:55

Total Clouds (% Sky Obscured)

100
100
100
100
99
99
98
99
96
94
91
92
92
92
92
92
92
91
88
82
85
85
90
93

Low Clouds (% Sky Obscured)

4
5
4
9
8
13
16
19
39
55
68
70
71
73
57
44
29
25
20
16
33
51
63
32

Medium Clouds (% Sky Obscured)

52
59
70
79
86
78
74
68
63
57
49
61
76
92
84
75
65
46
28
11
15
32
46
45

High Clouds (% Sky Obscured)

96
94
93
91
89
89
94
99
67
35
3
26
46
66
62
61
61
71
81
82
68
49
36
45

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
7
5
2
5
7
9
9
8
8
8
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

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

Precipitation Probability (%)

95
95
91
70
32
44
55
64
61
59
60
91
95
95
95
86
58
44
34
23
20
15
11
25

Precipitation Amount (mm)

0.8
0.9
0.7
0.4
0
0
0.2
0.3
0.3
0.3
0.2
0.5
0.6
0.7
0.6
0.4
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

83
83
85
85
85
83
80
77
75
75
75
75
79
83
85
80
75
70
75
80
85
85
86
86

Pressure (mb)

1009
1009
1008
1008
1008
1008
1008
1007
1007
1007
1006
1006
1006
1006
1005
1005
1005
1005
1005
1005
1005
1005
1005
1005

Ozone (du)

321
321
322
323
324
325
325
324
324
324
324
324
326
327
329
332
334
337
337
336
335
336
338
339

Friday 28

Full Moon 99%

19:57

06:15

Sun - Rise: 06:07, Set: 19:56, Transit: 13:01. Moon - Rise: 19:57, Set: 06:15. Civil Dark: 20:31 - 05:31. Nautical Dark: 21:15 - 04:47. Astro Dark: 22:05 - 03:58

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: 22/08/26 02:56:07. Forecast: 22/08/26 to 28/08/26. Timezone: UTC+1.00