Clear Outside v1.0 - International Weather Forecasts For Astronomers

Thursday 20

First Quarter 56%

15:38

22:40

02 OK
03 OK
04 OK
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: 05:54, Set: 20:13, Transit: 13:04. Moon - Rise: 15:38, Set: 22:40. Civil Dark: 20:50 - 05:17. Nautical Dark: 21:36 - 04:31. Astro Dark: 22:31 - 03:36

Total Clouds (% Sky Obscured)

25
33
33
46
54
73
57
61
69
66
76
91
90
72
60
77
73
68
86
81
79
84
86
81

Low Clouds (% Sky Obscured)

20
20
25
32
35
65
56
37
52
54
76
83
90
72
34
77
72
50
82
80
69
73
64
58

Medium Clouds (% Sky Obscured)

10
6
7
6
17
9
2
27
23
22
20
37
13
23
25
26
23
19
25
21
22
22
34
27

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
20
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
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

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

Precipitation Probability (%)

0
3
0
0
0
0
4
17
22
12
26
25
27
41
39
69
78
82
47
9
3
0
3
3

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.3
0.9
0.4
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

84
86
86
89
92
87
76
66
54
46
40
42
44
45
42
39
50
58
73
76
75
75
78
80

Pressure (mb)

1004
1004
1004
1004
1004
1004
1004
1004
1004
1004
1004
1004
1005
1005
1005
1005
1006
1006
1007
1008
1009
1009
1010
1010

Ozone (du)

337
339
340
341
344
348
350
352
352
351
350
351
352
352
351
350
350
351
351
347
344
344
343
343

Friday 21

Waxing Gibbous 66%

16:43

23:18

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

Sun - Rise: 05:56, Set: 20:11, Transit: 13:03. Moon - Rise: 16:43, Set: 23:18. Civil Dark: 20:48 - 05:19. Nautical Dark: 21:34 - 04:33. Astro Dark: 22:27 - 03:39

Total Clouds (% Sky Obscured)

64
62
63
54
56
69
71
44
53
44
48
55
5
58
84
29
35
39
32
43
42
25
21
2

Low Clouds (% Sky Obscured)

44
35
34
27
30
23
35
19
26
20
30
15
5
26
45
9
25
33
24
26
22
10
8
2

Medium Clouds (% Sky Obscured)

26
37
30
24
27
27
23
20
20
16
6
28
2
29
41
17
2
2
5
23
27
19
14
0

High Clouds (% Sky Obscured)

0
0
1
2
2
21
20
1
0
0
0
0
0
0
0
0
0
5
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
1
1
6
13
9
7
3
2
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

11
11
11
11
11
9
8
6
5
4
3
3
3
2
4
8
7
8
9
9
8
8
8
8

Relative Humidity (%)

83
89
92
92
92
83
72
60
50
42
36
33
31
29
32
48
49
58
67
71
71
72
77
81

Pressure (mb)

1010
1011
1011
1011
1011
1012
1013
1013
1013
1013
1013
1014
1013
1013
1013
1014
1015
1016
1016
1017
1018
1018
1019
1019

Ozone (du)

344
342
341
340
340
341
342
343
344
344
345
346
348
351
352
354
356
359
362
363
362
361
361
361

Saturday 22

Waxing Gibbous 75%

17:38

00:10

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

2
3
2
1
0
0
3
11
52
50
57
58
45
65
64
58
49
48
36
30
15
6
0
0

Low Clouds (% Sky Obscured)

2
3
2
1
0
0
3
11
46
41
44
31
15
23
29
33
23
44
36
30
15
6
0
0

Medium Clouds (% Sky Obscured)

0
1
0
0
0
0
0
0
0
0
2
20
17
25
22
22
17
11
6
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 (%)

0
1
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

83
83
81
80
82
74
62
51
45
42
38
34
32
29
28
27
28
30
33
35
38
46
51
57

Pressure (mb)

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

Ozone (du)

360
360
360
360
361
362
362
362
363
363
364
364
363
361
359
358
358
359
359
359
358
357
356
356

Sunday 23

Waxing Gibbous 83%

18:21

01:13

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

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
0
0
0
0
0
0
0
15
25
38
35
32
29
27
20
15
10
5
1
5
8
6
10

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
5
9
13
15
15
16
13
6
0
0
0
0
0
0
0
4

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
6
11
17
18
17
15
14
13
12
8
4
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
1
5
8
5
6

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
1
1
0
1
2
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
3
4
3
3
3
4
4
5
5
6
6
7
7
8
9
8
10
8
8
7
6

Chance of Frost

Temperature (°C)

13
12
12
12
11
11
14
16
18
20
21
22
23
23
24
23
22
21
19
17
16
15
14
14

Feels Like (°C)

13
13
12
12
11
11
14
16
18
19
20
21
21
22
22
21
20
19
17
14
14
14
13
13

Dew Point (°C)

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

Relative Humidity (%)

62
64
66
68
71
68
59
50
43
38
35
30
27
25
24
25
27
29
36
45
59
67
69
70

Pressure (mb)

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

Ozone (du)

356
355
356
354
352
351
348
347
347
346
346
346
344
342
340
339
337
336
334
333
332
331
331
330

Monday 24

Waxing Gibbous 90%

18:51

No Set

02 Good
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad
08 OK
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad
14 OK
15 OK
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)

18
54
51
52
63
56
44
44
54
70
82
59
37
14
47
74
100
92
87
80
79
79
75
79

Low Clouds (% Sky Obscured)

7
10
14
18
28
28
24
22
20
20
16
9
3
0
0
0
0
0
1
2
3
4
4
5

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
5
7
15
23
22
16
32
39
37
37

High Clouds (% Sky Obscured)

9
39
32
23
28
26
5
22
24
43
53
41
30
14
47
74
100
88
80
80
64
50
32
52

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
Very Light Rain
Very Light Rain
Light Rain

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
2
12
14
11
40
52
64
89

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.2
0.3
0.6

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

70
75
80
81
87
84
73
62
48
40
36
36
36
36
35
39
43
48
55
66
77
82
85
89

Pressure (mb)

1022
1022
1022
1021
1021
1021
1021
1020
1020
1019
1018
1018
1017
1016
1016
1015
1015
1014
1014
1014
1014
1014
1013
1012

Ozone (du)

330
329
328
328
327
328
328
327
326
325
324
325
324
323
322
323
324
325
324
323
322
320
319
318

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 Bad
19 Bad
20 Bad
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)

81
83
78
74
73
84
92
97
98
99
100
100
100
100
97
95
91
89
87
85
89
94
98
98

Low Clouds (% Sky Obscured)

6
7
6
10
10
15
19
23
33
41
47
55
62
70
52
32
8
6
5
4
14
24
35
54

Medium Clouds (% Sky Obscured)

23
23
33
41
46
58
69
81
85
88
93
95
97
100
90
79
69
50
31
15
25
48
64
72

High Clouds (% Sky Obscured)

72
83
60
33
5
8
7
5
37
68
100
85
70
54
52
52
54
49
45
44
40
40
39
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

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

Precipitation Probability (%)

95
95
93
95
95
77
53
27
34
39
39
28
19
2
3
2
0
6
7
5
35
32
27
35

Precipitation Amount (mm)

0.9
0.9
0.8
1.5
0.9
0.3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

15
15
15
15
16
16
17
19
20
21
21
21
21
21
20
20
21
21
20
18
17
17
17
17

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

89
89
89
83
80
77
66
56
49
48
47
46
46
46
46
53
59
67
71
76
82
85
88
93

Pressure (mb)

1012
1011
1010
1010
1010
1009
1009
1009
1009
1008
1008
1008
1008
1008
1008
1008
1008
1008
1008
1008
1009
1009
1008
1008

Ozone (du)

317
317
316
316
316
316
316
316
316
317
318
318
319
320
321
321
320
320
320
319
319
318
316
315

Wednesday 26

Waxing Gibbous 99%

19:31

03:41

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)

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: 20/08/26 02:11:57. Forecast: 20/08/26 to 26/08/26. Timezone: UTC+1.00