Clear Outside v1.0 - International Weather Forecasts For Astronomers

Thursday 15

Waning Gibbous 89%

00:28

06:53

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

Sun - Rise: 05:04, Set: 20:48, Transit: 12:57. Moon - Rise: 00:28, Set: 06:53. Civil Dark: 21:30 - 04:22. Nautical Dark: 22:28 - 03:23. Astro Dark: 23:59 - 01:48

Total Clouds (% Sky Obscured)

95
92
82
69
0
1
39
32
31
49
63
73
67
55
39
30
4
0
8
31
32
27
17
20

Low Clouds (% Sky Obscured)

80
69
55
59
0
0
39
32
31
49
63
73
67
55
39
30
4
0
8
31
32
27
17
20

Medium 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

High Clouds (% Sky Obscured)

2
2
2
2
0
1
2
2
2
2
2
6
4
4
2
15
3
0
0
0
0
3
3
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
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
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
10
8
8
8
7
7
7
7
7
7
7
9
10
10
11
11
12
12
12
13
14
14
13

Chance of Frost

Temperature (°C)

12
12
11
10
9
8
7
7
7
6
6
6
8
9
11
12
14
16
17
18
19
18
18
17

Feels Like (°C)

8
8
8
9
8
7
6
5
5
4
5
5
5
7
8
10
11
13
15
16
16
15
15
14

Dew Point (°C)

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

Relative Humidity (%)

66
66
72
91
93
95
93
94
94
96
96
93
85
74
61
56
51
47
46
45
43
43
46
55

Pressure (mb)

1025
1025
1026
1026
1027
1027
1027
1027
1027
1027
1027
1027
1027
1027
1027
1027
1027
1027
1026
1026
1025
1025
1025
1024

Ozone (du)

359
359
358
358
358
358
358
358
359
360
360
361
359
360
361
364
365
366
366
363
362
363
363
361

Friday 16

Waning Gibbous 82%

01:12

08:00

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

Sun - Rise: 05:03, Set: 20:49, Transit: 12:57. Moon - Rise: 01:12, Set: 08:00. Civil Dark: 21:31 - 04:20. Nautical Dark: 22:30 - 03:21. Astro Dark: 00:06 - 01:41

Total Clouds (% Sky Obscured)

1
23
40
81
87
87
85
86
78
96
91
89
78
90
86
70
80
68
48
33
29
33
37
26

Low Clouds (% Sky Obscured)

0
23
40
81
86
86
85
86
78
96
91
88
77
89
84
67
80
68
48
33
29
33
37
25

Medium 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

High Clouds (% Sky Obscured)

1
2
2
6
5
3
2
2
2
2
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
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)

12
12
11
10
11
12
10
9
10
9
10
11
11
11
11
10
10
9
8
8
8
8
9
10

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

13
11
8
8
6
5
6
7
6
6
6
6
5
6
7
8
10
11
13
15
16
16
16
15

Dew Point (°C)

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

Relative Humidity (%)

64
76
87
93
87
73
76
85
82
78
88
91
82
78
76
73
70
62
57
54
53
53
54
57

Pressure (mb)

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

Ozone (du)

359
358
357
358
357
358
357
358
359
359
358
357
359
360
360
360
361
362
364
365
365
365
365
366

Saturday 17

Waning Gibbous 74%

01:44

09:17

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

Sun - Rise: 05:02, Set: 20:51, Transit: 12:57. Moon - Rise: 01:44, Set: 09:17. Civil Dark: 21:33 - 04:19. Nautical Dark: 22:32 - 03:19. Astro Dark: 00:13 - 01:33

Total Clouds (% Sky Obscured)

1
0
0
0
0
0
11
15
16
22
24
50
89
91
88
84
85
79
64
39
35
45
19
12

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
11
15
16
22
24
50
82
86
84
79
81
51
46
32
27
17
8
0

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
14
11
6
0
1
1
2

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
1
1
6
4
0
2
2
2
1
0
0
1
3
6
15
8
10

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

Chance of Frost

Temperature (°C)

16
14
12
11
10
9
8
7
7
7
6
7
8
9
10
11
12
13
15
16
17
18
17
16

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

66
76
89
90
93
93
95
93
93
94
93
93
87
81
78
75
71
69
63
57
53
54
56
58

Pressure (mb)

1022
1023
1023
1023
1023
1023
1023
1023
1023
1022
1022
1022
1022
1022
1022
1022
1022
1022
1021
1021
1020
1020
1020
1020

Ozone (du)

366
366
367
368
370
372
371
372
373
374
374
373
373
372
372
372
375
379
380
379
377
376
375
375

Sunday 18

Waning Gibbous 64%

02:06

10:38

19 OK
20 OK
21 OK
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 OK
18 OK

Sun - Rise: 05:00, Set: 20:52, Transit: 12:57. Moon - Rise: 02:06, Set: 10:38. Civil Dark: 21:35 - 04:17. Nautical Dark: 22:35 - 03:17. Astro Dark: 00:21 - 01:23

Total Clouds (% Sky Obscured)

23
48
42
39
69
85
90
78
100
70
66
71
71
60
51
57
67
70
61
61
67
55
42
23

Low Clouds (% Sky Obscured)

0
0
0
0
0
4
3
3
2
2
5
9
20
32
40
49
59
57
46
36
28
32
32
23

Medium Clouds (% Sky Obscured)

9
17
24
33
42
48
55
58
45
31
24
29
71
60
51
57
67
51
24
26
26
16
8
0

High Clouds (% Sky Obscured)

8
8
3
20
41
62
75
78
100
54
27
6
3
0
7
15
2
2
0
0
0
0
1
1

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
1
1
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
1
1
0
1
1
1
3
3
2
6
7
4
7
7
9

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)

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

Chance of Frost

Temperature (°C)

16
13
11
10
9
9
8
8
7
7
7
8
9
11
12
13
14
15
17
18
19
19
18
18

Feels Like (°C)

14
11
8
8
8
7
5
5
6
4
5
6
6
7
9
10
11
12
15
16
16
17
15
16

Dew Point (°C)

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

Relative Humidity (%)

66
74
86
91
95
95
96
96
98
98
98
98
95
88
83
79
73
67
56
50
47
48
53
60

Pressure (mb)

1020
1021
1021
1021
1021
1021
1021
1021
1021
1021
1022
1022
1022
1022
1023
1023
1023
1022
1022
1021
1021
1021
1021
1021

Ozone (du)

375
375
376
380
381
381
384
386
387
388
389
391
392
393
393
391
391
391
389
388
389
389
389
389

Monday 19

Waning Gibbous 53%

02:24

12:01

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

Sun - Rise: 04:59, Set: 20:54, Transit: 12:57. Moon - Rise: 02:24, Set: 12:01. Civil Dark: 21:37 - 04:16. Nautical Dark: 22:37 - 03:14. Astro Dark: 00:31 - 01:04

Total Clouds (% Sky Obscured)

43
65
80
80
85
90
90
90
85
72
50
27
61
63
75
87
82
73
68
62
57
38
19
5

Low Clouds (% Sky Obscured)

18
10
0
0
0
0
14
28
43
38
32
27
61
63
75
87
76
65
58
52
46
31
19
5

Medium Clouds (% Sky Obscured)

20
40
45
45
50
50
50
50
50
33
17
0
19
13
9
10
11
9
10
9
11
30
19
5

High Clouds (% Sky Obscured)

29
57
80
80
85
85
82
74
67
42
22
0
18
9
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 (%)

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

Chance of Frost

Temperature (°C)

17
15
13
12
11
10
9
9
8
8
8
8
9
11
13
15
16
17
18
18
18
18
18
17

Feels Like (°C)

15
14
12
11
10
9
8
8
7
6
7
7
8
9
9
9
10
11
12
18
17
17
17
16

Dew Point (°C)

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

Relative Humidity (%)

63
68
79
84
88
90
93
93
93
95
95
95
88
79
68
60
57
55
52
54
55
57
58
59

Pressure (mb)

1021
1022
1022
1023
1023
1023
1023
1023
1023
1023
1023
1023
1023
1023
1023
1023
1022
1022
1021
1021
1021
1020
1020
1020

Ozone (du)

388
388
388
388
388
388
389
389
390
390
389
389
389
389
389
389
388
387
387
385
384
382
381
380

Tuesday 20

Third Quarter 42%

02:37

13:25

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

Sun - Rise: 04:58, Set: 20:55, Transit: 12:57. Moon - Rise: 02:37, Set: 13:25. Civil Dark: 21:38 - 04:14. Nautical Dark: 22:39 - 03:12. Astro Dark: 00:50 - N/A

Total Clouds (% Sky Obscured)

5
10
10
13
11
8
4
3
0
30
57
90
100
100
100
67
37
11
17
27
38
42
46
50

Low Clouds (% Sky Obscured)

5
9
8
7
7
7
4
2
0
0
0
0
0
0
0
0
0
0
1
5
4
11
15
27

Medium Clouds (% Sky Obscured)

5
10
10
13
11
8
4
3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

5
10
10
11
5
1
0
0
0
25
43
60
60
45
60
49
33
11
17
27
38
42
46
41

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

Chance of Frost

Temperature (°C)

17
15
13
11
10
9
8
8
7
7
8
8
9
11
12
14
15
17
18
18
17
17
17
17

Feels Like (°C)

16
13
12
11
11
10
9
7
7
7
7
6
7
9
10
10
11
12
12
17
16
15
15
15

Dew Point (°C)

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

Relative Humidity (%)

60
63
66
71
73
76
78
81
84
87
82
78
77
68
61
54
53
52
50
54
58
61
63
64

Pressure (mb)

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

Ozone (du)

379
377
376
374
372
370
368
369
369
369
367
366
364
365
365
365
365
365
365
364
363
362
361
361

Wednesday 21

Waning Crescent 30%

02:49

14:50

19 OK
20 OK
21 Good
22 Good
23 OK
00 OK
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: 04:56, Set: 20:56, Transit: 12:57. Moon - Rise: 02:49, Set: 14:50. Civil Dark: 21:40 - 04:13. Nautical Dark: 22:42 - 03:10. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

45
26
15
16
18
19
39
60
78
73
67
62
63
67
77
86
95
100

Low Clouds (% Sky Obscured)

24
17
10
7
4
0
10
19
27
15
7
3
13
25
36
51
59
65

Medium Clouds (% Sky Obscured)

0
0
0
0
0
1
10
20
30
20
11
0
13
31
50
51
55
56

High Clouds (% Sky Obscured)

35
15
15
15
16
16
19
21
21
30
44
61
63
67
77
86
85
80

ISS Passover

Visibility (miles)

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

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

2
5
0
0
1
0
1
3
0
0
0
0
0
0
0
12
16
17

Precipitation Amount (mm)

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

Chance of Frost

Temperature (°C)

16
14
12
11
9
8
7
6
6
5
6
7
8
10
11
13
13
14

Feels Like (°C)

15
12
12
11
11
10
10
3
3
3
4
4
3
6
6
6
7
7

Dew Point (°C)

10
9
7
6
6
6
5
5
4
4
4
4
4
4
4
5
6
7

Relative Humidity (%)

65
68
70
71
77
84
90
91
91
91
85
79
74
68
63
58
60
62

Pressure (mb)

1015
1016
1016
1017
1017
1017
1017
1017
1017
1016
1016
1016
1016
1016
1016
1015
1015
1015

Ozone (du)

361
360
360
360
361
361
362
364
366
368
370
372
373
374
374
375
375
375

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

Generated: 15/05/25 19:50:21. Forecast: 15/05/25 to 21/05/25. Timezone: UTC+1.00