Clear Outside v1.0 - International Weather Forecasts For Astronomers

Monday 18

Waxing Crescent 5%

05:31

23:54

00 Good
01 Good
02 OK
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

Sun - Rise: 05:02, Set: 20:52, Transit: 12:57. Moon - Rise: 05:31, Set: 23:54. Civil Dark: 21:34 - 04:19. Nautical Dark: 22:34 - 03:19. Astro Dark: 00:11 - 01:35

Total Clouds (% Sky Obscured)

2
4
19
60
100
100
99
100
90
100
100
100
95
96
89
80
66
93
98
74
93
96
100
99

Low Clouds (% Sky Obscured)

0
4
19
43
57
58
68
81
66
78
100
74
83
93
62
57
55
53
59
54
39
50
45
55

Medium Clouds (% Sky Obscured)

2
4
19
60
100
89
99
96
89
100
90
100
88
96
89
62
14
79
59
17
85
62
97
98

High Clouds (% Sky Obscured)

2
4
19
45
45
2
0
0
0
0
0
0
26
45
22
0
7
19
16
7
40
23
100
76

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
6
5
7
5
8
9
8
6
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
Very Light Rain
Very Light Rain
None
None
Very Light Rain
None
None
None
None
None
None
None

Precipitation Probability (%)

0
2
3
0
1
9
10
13
23
22
24
47
67
66
65
57
61
38
20
1
0
0
0
11

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0.3
0.3
0
0
0.3
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

90
93
93
94
94
94
93
91
84
82
88
76
70
71
72
73
70
68
72
74
76
83
87
91

Pressure (mb)

1011
1011
1011
1011
1010
1011
1011
1011
1011
1012
1012
1012
1011
1011
1011
1011
1011
1011
1011
1011
1011
1012
1012
1012

Ozone (du)

433
428
426
429
425
418
418
414
414
413
408
398
394
393
392
392
386
381
377
376
378
378
376
373

Tuesday 19

Waxing Crescent 12%

06:36

No Set

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 Bad
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad

Sun - Rise: 05:01, Set: 20:53, Transit: 12:57. Moon - Rise: 06:36, Set: No Set. Civil Dark: 21:36 - 04:18. Nautical Dark: 22:37 - 03:17. Astro Dark: 00:19 - 01:25

Total Clouds (% Sky Obscured)

96
96
99
99
100
100
100
100
100
100
100
100
99
96
97
85
75
81
77
93
88
82
70
73

Low Clouds (% Sky Obscured)

67
90
75
84
84
85
97
97
100
100
100
75
49
59
50
64
66
61
54
62
63
71
66
67

Medium Clouds (% Sky Obscured)

94
93
99
95
100
100
100
97
97
32
91
100
96
87
92
45
52
31
28
39
32
22
6
35

High Clouds (% Sky Obscured)

60
73
51
6
100
100
100
100
2
100
100
84
3
0
0
0
0
0
0
0
13
10
32
55

ISS Passover

Visibility (miles)

9
9
9
9
7
7
3
3
9
1
0
7
9
5
4
5
6
4
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
Very Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
None
None
Very Light Rain
Very Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Very Light Rain
None
None
None
None
None

Precipitation Probability (%)

19
35
47
64
92
95
95
94
73
47
32
50
59
72
75
72
74
62
45
28
7
8
0
0

Precipitation Amount (mm)

0
0
0
0.3
0.7
0.8
1.1
0.7
0.5
0
0
0.2
0.3
0.5
0.5
0.4
0.4
0.4
0.2
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

90
85
90
93
96
95
96
96
96
96
98
90
78
77
83
82
79
82
85
86
89
92
93
95

Pressure (mb)

1012
1011
1011
1010
1009
1009
1008
1008
1008
1008
1008
1007
1007
1007
1007
1007
1007
1008
1008
1009
1010
1011
1011
1012

Ozone (du)

371
370
370
371
374
380
382
385
389
387
386
388
389
383
384
385
386
382
384
384
384
386
384
384

Wednesday 20

Waxing Crescent 21%

07:58

00:48

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 Bad
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad

Sun - Rise: 04:59, Set: 20:55, Transit: 12:57. Moon - Rise: 07:58, Set: 00:48. Civil Dark: 21:38 - 04:16. Nautical Dark: 22:39 - 03:15. Astro Dark: 00:28 - 01:11

Total Clouds (% Sky Obscured)

89
76
100
96
92
95
90
92
85
89
56
74
91
94
79
84
99
60
49
60
75
87
79
70

Low Clouds (% Sky Obscured)

66
56
74
79
83
85
77
82
64
65
56
68
56
74
77
69
73
49
31
19
12
9
3
2

Medium Clouds (% Sky Obscured)

85
73
100
42
72
33
11
18
13
15
1
18
21
25
21
22
22
16
0
2
4
8
10
12

High Clouds (% Sky Obscured)

40
45
25
0
0
3
0
32
18
40
3
0
34
24
5
35
88
6
26
46
67
87
76
57

ISS Passover

Visibility (miles)

9
9
7
9
6
9
9
9
8
9
7
8
9
7
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
Very Light Rain
Very Light Rain
None
None
None
None
Very Light Rain
Very Light Rain
None
None
Light Rain
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

15
19
44
60
52
13
23
42
49
59
60
45
44
58
45
40
33
30
16
4
1
0
1
1

Precipitation Amount (mm)

0
0
0
0.3
0.2
0
0
0
0
0.3
0.3
0
0
0.4
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

10
10
10
10
11
11
12
12
12
13
13
13
13
13
12
12
11
12
12
13
13
13
12
12

Relative Humidity (%)

93
95
91
92
93
95
95
95
93
90
87
79
72
72
74
72
68
72
72
77
82
89
90
95

Pressure (mb)

1012
1013
1013
1013
1012
1013
1013
1014
1015
1015
1016
1017
1017
1018
1019
1019
1020
1020
1021
1021
1022
1023
1023
1024

Ozone (du)

386
387
385
382
381
377
377
369
361
359
359
360
356
352
350
349
346
345
342
341
340
340
340
340

Thursday 21

Waxing Crescent 31%

09:28

01:23

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 Bad
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 OK

Sun - Rise: 04:58, Set: 20:56, Transit: 12:57. Moon - Rise: 09:28, Set: 01:23. Civil Dark: 21:40 - 04:14. Nautical Dark: 22:41 - 03:13. Astro Dark: 00:43 - N/A

Total Clouds (% Sky Obscured)

71
80
91
100
100
96
69
82
95
94
87
81
73
69
64
62
73
86
99
96
100
93
64
37

Low Clouds (% Sky Obscured)

5
18
32
47
49
54
56
60
60
59
53
45
37
36
35
34
23
11
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

16
35
54
81
89
84
66
70
58
39
23
13
8
3
2
0
2
4
6
12
15
16
14
9

High Clouds (% Sky Obscured)

44
61
80
100
93
85
69
50
36
15
20
20
20
32
43
45
63
80
99
93
100
89
61
36

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

11
9
9
9
9
9
9
11
11
13
13
15
17
19
19
20
20
20
20
19
18
15
15
15

Dew Point (°C)

11
11
10
10
10
11
11
11
11
11
10
11
11
11
11
12
12
12
13
14
13
12
12
12

Relative Humidity (%)

93
93
93
93
93
95
93
89
83
74
66
63
57
54
52
52
51
53
58
65
70
73
77
80

Pressure (mb)

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

Ozone (du)

342
342
343
344
342
341
339
338
336
335
335
336
335
335
336
337
337
337
336
335
334
334
335
336

Friday 22

Waxing Crescent 42%

10:55

01:46

00 OK
01 OK
02 OK
03 Bad
04 OK
05 OK
06 OK
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 OK
22 Bad
23 Bad

Sun - Rise: 04:57, Set: 20:57, Transit: 12:57. Moon - Rise: 10:55, Set: 01:46. Civil Dark: 21:41 - 04:13. Nautical Dark: 22:44 - 03:11. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

46
43
44
52
41
36
40
52
65
73
81
80
79
77
75
70
74
74
71
59
51
42
62
81

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
3
6
9
11
13
15
10
5
0
0
0
0
12
24

Medium Clouds (% Sky Obscured)

12
14
19
15
18
20
21
28
36
43
41
39
41
25
11
1
4
8
11
11
11
11
13
16

High Clouds (% Sky Obscured)

29
24
24
23
11
5
4
16
27
36
35
37
40
44
47
48
48
51
48
35
21
15
38
60

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

Chance of Frost

Temperature (°C)

14
14
13
13
13
13
14
15
17
19
21
22
23
24
24
25
25
24
23
23
21
20
18
18

Feels Like (°C)

14
12
11
12
12
13
14
16
17
19
20
21
22
23
23
24
24
24
24
25
22
22
23
22

Dew Point (°C)

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

Relative Humidity (%)

80
79
80
84
87
89
87
84
74
68
62
58
53
48
47
47
46
51
55
60
65
70
75
76

Pressure (mb)

1027
1026
1026
1026
1026
1026
1026
1026
1026
1026
1026
1025
1025
1024
1024
1024
1023
1023
1023
1023
1023
1023
1023
1023

Ozone (du)

335
335
336
338
340
341
342
344
344
343
341
339
339
340
340
341
341
340
340
339
338
338
337
336

Saturday 23

First Quarter 53%

12:19

02:03

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 Bad
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad

Sun - Rise: 04:55, Set: 20:59, Transit: 12:57. Moon - Rise: 12:19, Set: 02:03. Civil Dark: 21:43 - 04:12. Nautical Dark: 22:46 - 03:09. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

98
100
100
100
97
94
84
74
64
55
58
61
60
61
64
69
71
71
73
68
56
57
54
54

Low Clouds (% Sky Obscured)

36
24
12
0
13
25
32
30
32
29
31
33
37
40
40
39
42
44
46
46
45
45
46
46

Medium Clouds (% Sky Obscured)

20
20
20
35
36
33
25
10
3
2
2
3
3
2
1
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

82
81
77
74
69
73
80
62
43
23
22
20
19
16
13
15
18
17
25
29
37
45
43
45

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
3
12
12
16
15
4
5
3
0
0
0
0
0
0
0
0
0
2
5
9
0
0
1

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

21
20
15
17
17
15
15
14
18
19
19
20
21
22
26
25
25
25
25
24
22
21
21
20

Dew Point (°C)

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

Relative Humidity (%)

77
79
79
81
79
79
78
75
71
66
62
59
56
56
55
54
53
59
64
71
75
78
83
81

Pressure (mb)

1023
1023
1023
1023
1023
1024
1024
1025
1025
1025
1026
1026
1026
1026
1026
1026
1026
1026
1026
1026
1027
1027
1028
1028

Ozone (du)

335
334
334
334
334
334
335
335
334
334
334
334
334
334
334
335
335
335
334
333
333
332
331
332

Sunday 24

Waxing Gibbous 64%

13:37

02:16

Sun - Rise: 04:54, Set: 21:00, Transit: 12:57. Moon - Rise: 13:37, Set: 02:16. Civil Dark: 21:44 - 04:10. Nautical Dark: 22:48 - 03:06. Astro Dark: N/A - N/A

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: 18/05/26 00:55:46. Forecast: 18/05/26 to 24/05/26. Timezone: UTC+1.00