Clear Outside v1.0 - International Weather Forecasts For Astronomers

Tuesday 18

Waxing Crescent 36%

13:09

21:51

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
00 Bad

Sun - Rise: 05:51, Set: 20:17, Transit: 13:04. Moon - Rise: 13:09, Set: 21:51. Civil Dark: 20:54 - 05:14. Nautical Dark: 21:42 - 04:27. Astro Dark: 22:37 - 03:31

Total Clouds (% Sky Obscured)

48
59
68
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
94
100

Low Clouds (% Sky Obscured)

27
59
68
94
93
48
21
46
57
74
68
32
22
23
14
24
22
18
17
1
0
16
50
59

Medium Clouds (% Sky Obscured)

41
55
68
72
38
100
100
81
93
100
94
100
94
96
93
95
87
93
99
100
100
100
92
100

High Clouds (% Sky Obscured)

48
59
68
100
100
100
100
100
100
100
100
98
100
100
100
100
100
100
100
100
100
100
73
28

ISS Passover

Visibility (miles)

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

Precipitation Probability (%)

60
95
95
43
30
2
0
2
12
6
1
0
0
0
0
1
0
0
0
0
0
0
3
15

Precipitation Amount (mm)

0
0
0
0.2
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
8
9
10
10
10
12
13
13
14
13
13
14
14
13
13
13
11
8
7
7
8
7

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

17
16
16
16
15
16
16
16
18
18
19
19
19
19
19
19
19
19
19
18
18
17
16
15

Dew Point (°C)

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

Relative Humidity (%)

60
60
67
71
74
78
81
77
72
69
64
57
46
42
40
39
36
36
39
43
48
48
50
52

Pressure (mb)

1013
1013
1013
1013
1012
1012
1012
1012
1012
1012
1012
1011
1011
1011
1011
1010
1010
1010
1009
1010
1010
1010
1010
1010

Ozone (du)

301
300
301
304
303
304
304
306
303
303
302
302
301
300
299
298
297
296
294
294
294
294
295
295

Wednesday 19

Waxing Crescent 46%

14:25

22:11

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 OK
20 OK
21 OK
22 OK
23 Good
00 Good

Sun - Rise: 05:52, Set: 20:15, Transit: 13:04. Moon - Rise: 14:25, Set: 22:11. Civil Dark: 20:52 - 05:16. Nautical Dark: 21:39 - 04:29. Astro Dark: 22:34 - 03:34

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
96
75
78
84
74
68
78
62
54
70
86
64
19
41
28
25
12
18

Low Clouds (% Sky Obscured)

72
72
71
72
85
80
72
35
32
39
50
55
63
30
49
42
71
64
15
37
20
20
6
8

Medium Clouds (% Sky Obscured)

100
100
100
98
49
49
50
55
32
21
20
26
78
51
54
31
33
3
0
2
0
0
5
9

High Clouds (% Sky Obscured)

97
100
100
100
71
100
67
68
72
67
20
0
0
0
0
0
0
0
0
0
0
0
0
0

ISS Passover

Visibility (miles)

9
9
8
9
7
9
9
9
9
9
9
9
4
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
Light Rain
Very Light Rain
Light Rain
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

35
65
63
70
46
47
28
17
12
4
10
32
24
25
20
4
8
13
7
2
0
0
0
0

Precipitation Amount (mm)

0
0.4
0.3
0.5
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
6
6
6
6
5
5
7
8
9
10
10
12
11
13
13
12
12
12
11
9
10
9
9

Chance of Frost

Temperature (°C)

17
16
16
15
15
15
15
16
16
18
19
21
22
22
23
23
23
23
22
20
19
17
16
15

Feels Like (°C)

15
14
14
14
14
14
14
14
16
17
18
18
18
19
19
19
21
19
18
18
16
16
15
14

Dew Point (°C)

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

Relative Humidity (%)

58
66
78
85
87
87
89
82
68
60
53
46
50
47
46
50
44
46
46
48
50
56
63
69

Pressure (mb)

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

Ozone (du)

296
295
296
301
305
307
311
317
318
320
322
324
324
325
329
327
325
325
329
335
345
338
339
342

Thursday 20

First Quarter 56%

15:38

22:40

01 Good
02 Good
03 OK
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 OK
22 OK
23 OK
00 OK

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)

16
6
32
66
72
50
67
54
44
58
65
65
83
85
81
86
91
72
66
57
30
35
35
35

Low Clouds (% Sky Obscured)

3
5
19
53
61
30
33
42
42
27
50
59
80
83
81
80
90
67
66
57
25
31
35
35

Medium Clouds (% Sky Obscured)

13
3
14
66
31
23
27
12
0
17
15
10
10
8
0
20
13
14
9
5
0
0
0
0

High Clouds (% Sky Obscured)

0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
1
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
Light Rain
None
None
None
None
None
None

Precipitation Probability (%)

0
0
0
0
0
0
0
0
3
11
36
33
16
14
12
26
36
56
31
26
21
18
12
0

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.4
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

10
10
11
11
11
11
11
11
11
10
8
7
6
6
7
7
7
11
11
10
10
10
11
11

Relative Humidity (%)

75
80
84
86
89
90
89
78
68
56
46
40
37
37
39
39
40
58
61
61
65
74
82
84

Pressure (mb)

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

Ozone (du)

342
340
341
342
344
345
345
346
346
347
348
347
346
346
345
345
344
344
343
342
342
340
336
334

Friday 21

Waxing Gibbous 66%

16:43

23:18

01 OK
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 OK

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)

44
75
95
96
98
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
71
55
48
41

Low Clouds (% Sky Obscured)

41
44
52
54
58
67
81
79
81
73
65
60
68
79
87
84
63
63
39
33
30
25
20
17

Medium Clouds (% Sky Obscured)

1
2
2
4
6
13
17
22
27
28
29
30
35
35
38
52
38
52
96
97
56
29
23
20

High Clouds (% Sky Obscured)

14
51
83
89
94
100
100
100
67
70
65
48
99
100
100
100
100
100
88
76
8
6
2
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
1
2
1
2
12
3
6
9
8
21
29
34
45
48
45
32
21
7
5
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

81
80
81
89
93
96
92
80
73
69
68
64
61
57
51
47
44
41
41
49
61
69
75
83

Pressure (mb)

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

Ozone (du)

332
331
332
332
333
335
337
338
339
339
339
339
340
341
342
343
344
345
344
344
345
344
343
341

Saturday 22

Waxing Gibbous 75%

17:38

00:10

01 OK
02 OK
03 OK
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

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)

42
38
32
39
44
71
74
70
89
83
76
72
73
72
76
87
86
86
76
65
54
54
55
59

Low Clouds (% Sky Obscured)

20
22
21
23
23
32
29
23
18
18
20
17
19
22
27
20
12
4
1
2
0
0
0
0

Medium Clouds (% Sky Obscured)

16
10
6
3
2
0
0
0
0
6
12
18
17
17
15
9
7
12
17
14
9
13
13
9

High Clouds (% Sky Obscured)

0
0
0
0
2
40
49
29
84
69
55
50
51
52
67
68
68
64
55
44
27
31
27
25

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

Chance of Frost

Temperature (°C)

12
11
11
11
10
10
10
12
14
16
17
18
19
19
19
19
19
18
18
16
15
14
13
12

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

84
88
90
91
90
90
83
66
55
48
43
39
36
37
38
40
40
40
40
44
50
57
63
70

Pressure (mb)

1018
1018
1018
1019
1019
1019
1020
1020
1021
1021
1021
1020
1020
1020
1020
1020
1020
1020
1020
1021
1021
1022
1022
1022

Ozone (du)

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

Sunday 23

Waxing Gibbous 83%

18:21

No Set

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
00 Bad

Sun - Rise: 05:59, Set: 20:07, Transit: 13:03. Moon - Rise: 18:21, Set: No Set. Civil Dark: 20:43 - 05:23. Nautical Dark: 21:29 - 04:37. Astro Dark: 22:21 - 03:45

Total Clouds (% Sky Obscured)

63
66
64
65
69
75
82
87
92
95
97
100
96
94
91
92
94
96
92
85
75
76
66
66

Low Clouds (% Sky Obscured)

0
0
0
0
1
1
2
5
8
15
24
34
33
32
31
35
41
60
44
24
4
6
7
10

Medium Clouds (% Sky Obscured)

22
28
39
49
57
66
57
42
28
32
36
30
25
20
15
15
10
10
10
10
15
14
32
40

High Clouds (% Sky Obscured)

40
60
64
65
69
73
82
87
92
95
97
100
96
94
91
92
94
90
90
85
75
76
66
65

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
1
0
0
0
0
0
0
0
0
1
2
3
17
27
36
41
41
34
27
20
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)

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

Chance of Frost

Temperature (°C)

11
11
11
10
10
10
11
12
14
16
17
18
20
20
20
20
19
18
17
16
15
14
14
14

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

79
81
85
88
87
85
81
69
58
48
42
37
33
31
30
28
31
34
38
43
49
56
63
71

Pressure (mb)

1022
1022
1021
1021
1021
1021
1021
1021
1021
1021
1020
1020
1019
1019
1019
1018
1018
1018
1018
1018
1019
1019
1018
1018

Ozone (du)

342
341
341
341
341
342
342
343
343
343
343
343
342
342
342
341
341
341
341
341
341
341
341
340

Monday 24

Waxing Gibbous 90%

18:51

01:13

Sun - Rise: 06:01, Set: 20:05, Transit: 13:03. Moon - Rise: 18:51, Set: 01:13. Civil Dark: 20:41 - 05:24. Nautical Dark: 21:26 - 04:39. Astro Dark: 22:18 - 03:48

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: 18/08/26 01:27:43. Forecast: 18/08/26 to 24/08/26. Timezone: UTC+1.00