Clear Outside v1.0 - International Weather Forecasts For Astronomers

Thursday 24

Waning Crescent 17%

04:44

15:48

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 Good
20 Good
21 Good
22 Good
23 Good
00 Good
01 Good
02 Good
03 Good
04 OK
05 Bad
06 Bad

Sun - Rise: 05:41, Set: 20:14, Transit: 12:58. Moon - Rise: 04:44, Set: 15:48. Civil Dark: 20:51 - 05:04. Nautical Dark: 21:38 - 04:16. Astro Dark: 22:35 - 03:18

Total Clouds (% Sky Obscured)

100
96
94
99
97
95
95
97
92
64
69
41
0
1
1
0
0
1
0
0
1
17
79
96

Low Clouds (% Sky Obscured)

83
84
74
58
61
49
48
54
56
45
54
40
0
0
0
0
0
0
0
0
0
17
79
96

Medium Clouds (% Sky Obscured)

24
20
17
17
16
13
16
37
19
14
10
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

3
5
21
92
72
45
41
38
3
0
0
0
0
0
0
0
0
1
0
0
1
4
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
4
10
2
1
1
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)

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

Chance of Frost

Temperature (°C)

8
9
9
10
11
12
12
13
14
14
14
14
13
11
10
9
8
7
6
5
5
4
4
4

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

91
87
78
71
65
61
57
54
51
54
64
68
72
81
82
87
91
93
93
93
93
93
93
93

Pressure (mb)

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

Ozone (du)

351
350
350
351
353
353
352
350
349
351
350
350
349
349
348
348
346
343
341
340
339
337
336
335

Friday 25

Waning Crescent 9%

04:56

17:17

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
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad

Sun - Rise: 05:39, Set: 20:15, Transit: 12:58. Moon - Rise: 04:56, Set: 17:17. Civil Dark: 20:53 - 05:01. Nautical Dark: 21:41 - 04:13. Astro Dark: 22:38 - 03:15

Total Clouds (% Sky Obscured)

96
72
75
87
86
77
79
100
100
100
100
99
99
100
100
100
100
100
100
91
100
100
100
100

Low Clouds (% Sky Obscured)

96
72
71
79
75
69
65
70
86
80
88
48
16
0
10
30
33
49
54
57
58
59
56
51

Medium Clouds (% Sky Obscured)

0
0
3
48
50
54
55
100
100
91
86
48
50
50
52
48
30
93
100
73
100
97
100
100

High Clouds (% Sky Obscured)

5
5
35
56
54
43
59
100
82
75
94
95
94
100
100
100
100
100
100
66
90
92
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
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
4
2
0
3
3
0
0
0
0
0
1
4
15
24
31
37
41

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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

90
84
75
69
64
61
56
54
53
53
57
64
70
78
84
88
91
93
93
94
94
93
93
93

Pressure (mb)

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

Ozone (du)

334
335
334
335
335
335
336
336
336
336
337
338
337
337
338
338
339
341
341
342
342
342
343
345

Saturday 26

Waning Crescent 3%

05:10

18:49

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
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad

Sun - Rise: 05:37, Set: 20:17, Transit: 12:58. Moon - Rise: 05:10, Set: 18:49. Civil Dark: 20:55 - 04:59. Nautical Dark: 21:43 - 04:10. Astro Dark: 22:41 - 03:11

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
99
99
98
97
96
95
95
95
96
95
94
93
93
93
82

Low Clouds (% Sky Obscured)

53
57
53
75
80
72
75
82
86
84
65
49
48
46
59
54
40
29
18
12
2
2
6
11

Medium Clouds (% Sky Obscured)

100
84
87
83
99
86
91
44
81
99
98
96
93
90
88
88
90
91
91
91
91
75
31
27

High Clouds (% Sky Obscured)

50
100
100
98
100
74
53
33
10
11
12
13
8
9
9
8
6
10
10
15
15
20
19
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 (%)

44
40
35
35
34
37
30
34
38
37
29
30
25
13
5
4
2
0
1
1
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

90
84
78
72
69
64
60
57
57
63
65
67
74
79
83
81
81
83
83
84
85
91
95
95

Pressure (mb)

1021
1022
1022
1022
1022
1022
1022
1022
1022
1022
1022
1022
1023
1023
1024
1024
1024
1024
1024
1024
1024
1024
1024
1024

Ozone (du)

347
346
346
347
348
347
347
348
349
349
351
351
352
354
356
356
356
356
356
356
356
356
358
360

Sunday 27

New Moon 0%

05:29

20:25

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
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad

Sun - Rise: 05:35, Set: 20:19, Transit: 12:58. Moon - Rise: 05:29, Set: 20:25. Civil Dark: 20:56 - 04:57. Nautical Dark: 21:45 - 04:08. Astro Dark: 22:45 - 03:08

Total Clouds (% Sky Obscured)

80
67
68
67
69
71
90
89
88
92
97
100
100
100
100
93
83
75
69
57
50
53
51
55

Low Clouds (% Sky Obscured)

14
13
17
23
29
39
36
33
28
19
16
34
13
7
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

29
39
33
38
35
32
31
89
31
88
72
71
66
66
52
26
30
33
31
29
26
25
24
26

High Clouds (% Sky Obscured)

0
0
2
2
2
4
35
20
20
43
72
100
100
100
100
78
58
38
32
13
8
15
10
28

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
2
6
18
13
21
5
15
11
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

91
83
76
70
62
56
53
52
58
62
66
72
77
82
84
86
87
88
90
90
91
91
93
93

Pressure (mb)

1024
1025
1025
1025
1024
1024
1024
1024
1024
1023
1023
1024
1024
1024
1025
1025
1025
1025
1025
1025
1025
1025
1025
1025

Ozone (du)

359
355
354
357
359
357
356
354
354
354
356
355
357
356
355
355
353
351
349
349
348
347
346
344

Monday 28

Waxing Crescent 1%

05:54

22:03

07 Bad
08 OK
09 OK
10 Good
11 Good
12 Good
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
02 Good
03 Good
04 Good
05 Good
06 Good

Sun - Rise: 05:33, Set: 20:20, Transit: 12:58. Moon - Rise: 05:54, Set: 22:03. Civil Dark: 20:58 - 04:55. Nautical Dark: 21:48 - 04:05. Astro Dark: 22:48 - 03:04

Total Clouds (% Sky Obscured)

43
37
23
5
0
0
10
20
30
20
10
5
4
8
7
11
11
11
6
8
7
4
4
2

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
10
20
30
20
10
5
4
8
7
4
2
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
1
3
4
4
4
4
2
1
0
0
0
0

High Clouds (% Sky Obscured)

33
28
22
5
0
0
10
14
13
10
10
5
4
8
7
11
11
11
6
8
7
4
4
2

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
7
10
10
12
12
7
13
14
12
10
8
2
2
1
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
3
4
5
6
7
7
7
7
7
8
8
7
6
5
5
5
5
5
5
5
5
5

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

8
10
11
12
13
13
14
19
18
17
17
17
18
14
13
13
12
12
11
7
8
7
7
7

Dew Point (°C)

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

Relative Humidity (%)

90
84
79
74
67
62
57
56
55
54
60
66
73
78
82
87
85
87
87
88
88
90
88
87

Pressure (mb)

1025
1025
1025
1025
1024
1024
1024
1023
1023
1022
1022
1022
1022
1022
1022
1022
1022
1022
1022
1022
1021
1021
1021
1021

Ozone (du)

342
341
340
340
339
338
337
336
335
334
332
331
330
330
329
328
328
328
329
328
328
327
328
329

Tuesday 29

Waxing Crescent 5%

06:32

23:37

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

Sun - Rise: 05:31, Set: 20:22, Transit: 12:58. Moon - Rise: 06:32, Set: 23:37. Civil Dark: 21:00 - 04:53. Nautical Dark: 21:50 - 04:03. Astro Dark: 22:51 - 03:00

Total Clouds (% Sky Obscured)

4
7
11
37
60
85
70
56
47
32
17
2
2
1
1
1
1
1
1
2
5
18
31
43

Low 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

Medium Clouds (% Sky Obscured)

3
4
5
2
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

4
7
8
26
44
62
49
37
34
26
15
2
2
1
1
1
1
1
1
2
2
3
4
5

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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

7
10
10
11
11
13
14
17
16
15
15
15
15
11
11
11
10
10
9
8
8
7
7
7

Dew Point (°C)

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

Relative Humidity (%)

85
77
72
67
63
58
53
54
54
55
59
64
68
69
70
71
74
78
81
84
85
88
90
90

Pressure (mb)

1021
1020
1020
1020
1020
1019
1019
1019
1018
1018
1018
1018
1018
1018
1018
1019
1019
1019
1019
1019
1018
1018
1018
1019

Ozone (du)

330
330
331
331
332
332
332
333
333
334
333
333
333
333
333
334
334
334
334
334
335
335
336
336

Wednesday 30

Waxing Crescent 12%

No Rise

00:56

Sun - Rise: 05:29, Set: 20:24, Transit: 12:57. Moon - Rise: No Rise, Set: 00:56. Civil Dark: 21:02 - 04:51. Nautical Dark: 21:52 - 04:00. Astro Dark: 22:55 - 02:57

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: 24/04/25 07:29:02. Forecast: 24/04/25 to 30/04/25. Timezone: UTC+1.00