Clear Outside v1.0 - International Weather Forecasts For Astronomers

Tuesday 21

Waxing Crescent 35%

08:55

02:09

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

Sun - Rise: 05:48, Set: 20:10, Transit: 12:59. Moon - Rise: 08:55, Set: 02:09. Civil Dark: 20:47 - 05:11. Nautical Dark: 21:33 - 04:24. Astro Dark: 22:28 - 03:29

Total Clouds (% Sky Obscured)

0
0
6
16
23
37
39
34
22
19
24
45
6
0
0
0
0
0
0
0
0
4
0
5

Low Clouds (% Sky Obscured)

0
0
6
16
23
37
39
34
22
19
24
45
6
0
0
0
0
0
0
0
0
0
0
0

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)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
4
0
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)

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

Chance of Frost

Temperature (°C)

5
5
4
4
4
4
4
4
5
7
9
11
13
14
14
15
15
15
14
13
12
10
9
7

Feels Like (°C)

3
2
2
1
1
1
2
1
2
4
6
7
8
9
9
10
11
11
10
9
8
6
5
4

Dew Point (°C)

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

Relative Humidity (%)

83
85
88
91
91
94
94
94
90
82
72
62
57
52
50
48
49
51
53
61
67
72
77
78

Pressure (mb)

1026
1026
1026
1026
1026
1025
1025
1026
1026
1027
1027
1027
1027
1027
1026
1027
1027
1027
1027
1027
1027
1028
1029
1029

Ozone (du)

401
399
398
397
394
392
390
389
389
387
384
377
374
373
372
372
372
372
371
370
369
370
370
371

Wednesday 22

Waxing Crescent 46%

10:18

02:53

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

Sun - Rise: 05:46, Set: 20:12, Transit: 12:59. Moon - Rise: 10:18, Set: 02:53. Civil Dark: 20:49 - 05:09. Nautical Dark: 21:36 - 04:21. Astro Dark: 22:31 - 03:26

Total Clouds (% Sky Obscured)

5
10
10
35
41
40
38
42
48
42
30
7
7
0
0
0
0
0
0
0
0
0
0
0

Low Clouds (% Sky Obscured)

0
0
0
35
41
40
38
42
48
42
30
7
7
0
0
0
0
0
0
0
0
0
0
0

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)

5
10
10
6
19
5
2
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
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)

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

Chance of Frost

Temperature (°C)

6
6
5
5
5
5
4
4
5
6
8
10
13
14
16
17
17
17
17
16
14
12
9
8

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

79
81
80
83
86
91
91
91
89
79
70
64
58
53
49
48
46
46
49
57
67
76
81
85

Pressure (mb)

1029
1030
1030
1030
1030
1030
1030
1031
1031
1031
1032
1032
1031
1031
1030
1030
1030
1029
1029
1029
1029
1029
1030
1030

Ozone (du)

372
371
372
373
375
375
376
377
382
386
391
395
395
395
394
392
390
387
385
383
380
376
374
372

Thursday 23

Waxing Crescent 58%

11:45

03:22

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

Sun - Rise: 05:44, Set: 20:13, Transit: 12:58. Moon - Rise: 11:45, Set: 03:22. Civil Dark: 20:50 - 05:06. Nautical Dark: 21:38 - 04:19. Astro Dark: 22:34 - 03:22

Total Clouds (% Sky Obscured)

0
0
0
0
4
5
9
49
70
70
12
0
0
0
0
0
0
0
0
0
0
0
0
0

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
25
0
0
0
0
0
0
0
0
0
0
0
0
0
0

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)

0
0
0
0
2
3
6
35
55
55
12
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)

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

Chance of Frost

Temperature (°C)

7
6
5
4
3
3
2
2
3
5
7
9
11
13
15
16
17
17
17
16
15
12
11
9

Feels Like (°C)

6
4
3
2
1
1
0
-1
1
2
5
7
9
11
13
14
14
15
15
15
14
12
10
8

Dew Point (°C)

4
2
0
-2
-2
-3
-3
-3
-2
-2
-2
-1
-0
1
2
3
4
4
5
7
8
8
7
6

Relative Humidity (%)

85
78
72
69
69
69
70
71
70
61
54
49
45
43
42
41
41
42
44
53
63
72
78
81

Pressure (mb)

1030
1030
1029
1029
1029
1029
1028
1028
1028
1029
1029
1029
1028
1028
1027
1026
1025
1025
1025
1024
1024
1024
1025
1025

Ozone (du)

372
372
371
370
370
371
372
374
378
383
384
384
386
387
387
385
379
376
375
373
371
368
367
366

Friday 24

First Quarter 68%

13:10

03:42

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

Sun - Rise: 05:42, Set: 20:15, Transit: 12:58. Moon - Rise: 13:10, Set: 03:42. Civil Dark: 20:52 - 05:04. Nautical Dark: 21:40 - 04:16. Astro Dark: 22:38 - 03:19

Total Clouds (% Sky Obscured)

0
0
19
34
48
54
59
80
49
43
48
22
22
21
29
21
5
7
24
33
52
75
97
98

Low Clouds (% Sky Obscured)

0
0
16
32
48
54
59
75
49
30
0
0
0
0
0
0
0
1
2
3
2
1
0
0

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
10
20
26
27

High Clouds (% Sky Obscured)

0
0
0
0
0
4
7
15
11
13
18
11
11
10
25
21
5
7
24
33
52
72
95
96

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)

4
4
4
3
3
3
2
3
4
3
3
3
4
5
5
5
6
6
6
6
6
6
6
6

Chance of Frost

Temperature (°C)

8
7
6
6
5
5
4
4
4
7
10
12
14
15
17
18
18
18
18
17
16
14
12
10

Feels Like (°C)

7
6
6
4
4
4
3
2
2
6
8
9
12
13
15
15
16
17
17
15
13
11
9
7

Dew Point (°C)

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

Relative Humidity (%)

81
77
72
68
66
62
60
56
58
50
44
41
41
43
43
45
48
50
52
56
65
72
79
74

Pressure (mb)

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

Ozone (du)

365
363
362
361
361
361
361
361
359
357
357
357
357
358
358
357
357
358
358
358
357
357
359
362

Saturday 25

Waxing Gibbous 78%

14:30

03:57

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
19 Bad
20 Bad
21 Bad
22 Bad

Sun - Rise: 05:40, Set: 20:17, Transit: 12:58. Moon - Rise: 14:30, Set: 03:57. Civil Dark: 20:54 - 05:02. Nautical Dark: 21:42 - 04:14. Astro Dark: 22:41 - 03:15

Total Clouds (% Sky Obscured)

99
100
100
100
99
100
100
100
99
100
90
100
99
96
91
86
78
63
44
26
49
72
94
67

Low Clouds (% Sky Obscured)

0
0
17
36
53
65
73
82
79
75
72
58
44
30
28
27
26
17
9
0
0
0
0
0

Medium Clouds (% Sky Obscured)

27
40
52
87
98
99
99
100
94
75
52
53
48
50
41
30
23
16
9
0
1
2
3
16

High Clouds (% Sky Obscured)

98
100
97
94
90
88
79
80
61
56
25
64
75
82
67
51
34
31
29
26
46
60
75
62

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

6
6
5
4
4
3
3
3
4
5
6
9
9
10
12
13
13
13
14
14
14
12
11
11

Dew Point (°C)

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

Relative Humidity (%)

74
78
79
75
74
76
82
90
88
81
73
65
60
57
55
54
53
53
58
63
70
75
78
84

Pressure (mb)

1026
1026
1027
1027
1027
1027
1027
1027
1028
1028
1028
1028
1028
1028
1027
1027
1027
1027
1027
1027
1027
1027
1028
1028

Ozone (du)

365
367
369
370
371
371
372
372
370
369
369
371
373
376
376
375
375
374
374
373
373
372
371
371

Sunday 26

Waxing Gibbous 86%

15:47

04:09

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

Sun - Rise: 05:38, Set: 20:18, Transit: 12:58. Moon - Rise: 15:47, Set: 04:09. Civil Dark: 20:56 - 05:00. Nautical Dark: 21:45 - 04:11. Astro Dark: 22:44 - 03:12

Total Clouds (% Sky Obscured)

36
4
0
0
0
22
43
67
53
31
25
38
48
53
52
48
38
38
37
35
31
12
13
31

Low Clouds (% Sky Obscured)

0
0
0
0
0
5
9
11
7
4
0
11
21
34
25
13
0
0
0
0
0
0
0
25

Medium Clouds (% Sky Obscured)

29
4
0
0
0
22
43
67
53
31
25
38
48
53
46
38
38
31
16
0
0
0
0
0

High Clouds (% Sky Obscured)

36
4
0
0
0
22
19
15
9
7
6
5
4
2
2
1
1
4
5
11
18
12
13
31

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)

3
2
2
1
2
3
3
3
4
5
6
8
9
10
11
11
11
12
12
11
11
10
9
8

Chance of Frost

Temperature (°C)

8
7
6
6
5
5
5
5
5
8
10
12
13
14
15
16
16
16
16
15
15
13
11
9

Feels Like (°C)

10
9
8
3
2
3
2
2
2
3
4
5
5
6
7
13
12
12
13
14
15
9
9
8

Dew Point (°C)

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

Relative Humidity (%)

85
85
85
82
80
80
79
79
80
74
68
64
62
60
57
56
55
54
56
59
62
69
75
82

Pressure (mb)

1028
1028
1029
1029
1029
1029
1029
1029
1029
1029
1029
1029
1029
1029
1029
1028
1028
1028
1028
1028
1028
1028
1029
1029

Ozone (du)

371
371
370
371
372
373
374
375
376
376
376
376
378
379
380
381
381
381
380
379
378
379
381
382

Monday 27

Waxing Gibbous 93%

17:02

04:19

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

Sun - Rise: 05:36, Set: 20:20, Transit: 12:58. Moon - Rise: 17:02, Set: 04:19. Civil Dark: 20:58 - 04:58. Nautical Dark: 21:47 - 04:09. Astro Dark: 22:47 - 03:08

Total Clouds (% Sky Obscured)

53
76
78
79
80
79
77
73
60
47
32
41
44
55
54
57
51
46
52
58

Low Clouds (% Sky Obscured)

48
72
74
76
80
79
77
73
57
42
28
33
40
47
51
57
51
46
52
51

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
2
5
7
12
18
24
29
33
30

High Clouds (% Sky Obscured)

38
33
33
28
23
14
9
3
3
2
2
2
3
3
3
3
2
9
16
22

ISS Passover

Visibility (miles)

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

Precipitation Type

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
8
12
16
18
16
10

Precipitation Amount (mm)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

7
7
6
2
3
3
2
2
1
6
6
6
6
8
8
11
10
9
9
10

Dew Point (°C)

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

Relative Humidity (%)

87
91
96
96
96
98
94
90
87
75
66
58
54
50
47
49
50
51
54
57

Pressure (mb)

1029
1029
1029
1029
1029
1029
1028
1028
1028
1028
1028
1027
1027
1027
1026
1026
1025
1025
1025
1025

Ozone (du)

382
383
383
385
388
390
391
391
392
391
390
390
389
388
387
386
386
385
385
385

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

Generated: 21/04/26 23:08:45. Forecast: 21/04/26 to 27/04/26. Timezone: UTC+1.00