Clear Outside v1.0 - International Weather Forecasts For Astronomers

Monday 17

Waxing Crescent 27%

11:52

21:35

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: 05:49, Set: 20:19, Transit: 13:04. Moon - Rise: 11:52, Set: 21:35. Civil Dark: 20:57 - 05:12. Nautical Dark: 21:44 - 04:24. Astro Dark: 22:41 - 03:28

Total Clouds (% Sky Obscured)

61
71
77
97
100
85
94
93
92
94
97
90
90
97
95
95
95
87
93
95
64
78
100
74

Low Clouds (% Sky Obscured)

25
71
17
82
80
82
76
82
37
93
83
28
52
85
77
74
57
77
81
80
32
30
64
14

Medium Clouds (% Sky Obscured)

61
71
77
23
21
5
3
35
33
36
49
72
49
54
85
93
93
82
90
44
30
34
26
34

High Clouds (% Sky Obscured)

61
71
77
85
100
59
84
43
34
34
30
6
5
25
25
4
2
0
0
70
8
26
100
74

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 (%)

39
10
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
3

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

Chance of Frost

Temperature (°C)

19
18
17
16
15
15
16
17
19
20
22
22
24
24
24
25
25
24
24
23
22
21
20
19

Feels Like (°C)

17
16
16
13
14
14
15
16
18
19
21
21
23
23
22
24
24
24
23
23
21
21
20
18

Dew Point (°C)

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

Relative Humidity (%)

55
61
55
59
64
72
73
70
62
52
50
48
42
40
41
38
42
43
44
49
59
65
63
55

Pressure (mb)

1016
1016
1016
1016
1016
1016
1016
1017
1017
1017
1017
1017
1016
1016
1016
1015
1015
1015
1015
1014
1015
1014
1014
1014

Ozone (du)

318
317
317
317
314
313
311
309
307
304
303
301
299
299
302
303
302
304
303
300
300
299
297
295

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)

100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

13
45
59
89
100
100
89
59
67
57
33
51
26
24
25
27
11
12
64
54
58
55
60
60

Medium Clouds (% Sky Obscured)

35
37
89
97
98
74
90
100
90
100
100
96
98
100
100
95
100
100
100
100
100
100
100
100

High Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
96
100
98
100
100
100
100
100
100

ISS Passover

Visibility (miles)

9
9
9
6
3
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
Light Rain
Light Rain
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
Very Light Rain
Very Light Rain

Precipitation Probability (%)

12
45
41
88
81
37
7
2
3
17
9
3
0
0
0
0
0
0
0
8
18
36
48
48

Precipitation Amount (mm)

0
0
0
0.9
0.7
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.2
0.2

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

19
19
18
18
17
17
17
18
19
20
21
22
23
23
23
23
23
22
21
21
19
19
18
17

Feels Like (°C)

18
17
16
16
15
15
16
16
17
19
20
19
20
20
20
19
19
19
18
18
17
16
15
15

Dew Point (°C)

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

Relative Humidity (%)

64
72
69
65
78
86
86
85
82
78
71
67
56
46
40
36
34
35
36
40
44
47
53
59

Pressure (mb)

1014
1014
1013
1013
1013
1012
1012
1012
1012
1012
1012
1011
1011
1011
1011
1010
1010
1009
1009
1010
1010
1010
1010
1010

Ozone (du)

298
299
300
300
299
302
304
304
303
302
302
301
301
301
300
300
300
300
299
299
299
300
301
305

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 Bad
20 Bad
21 Bad
22 OK
23 OK
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
92
66
57
52
58
44
49
66
58
60
67
60
51
45
35
44
35
11
3

Low Clouds (% Sky Obscured)

30
23
15
46
43
66
57
42
52
33
26
22
16
23
27
39
31
40
38
27
44
35
7
2

Medium Clouds (% Sky Obscured)

100
80
80
3
8
16
0
14
0
15
11
17
27
21
21
20
21
1
3
4
5
3
1
0

High Clouds (% Sky Obscured)

100
100
100
100
100
42
24
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 (%)

25
4
13
10
12
10
9
9
3
2
0
1
3
3
9
15
22
27
17
15
11
8
5
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
8
8
8
9
9
9
11
11
11
12
13
13
13
15
14
15
14
13
11
9
10
10
10

Chance of Frost

Temperature (°C)

16
16
15
15
15
14
15
16
17
19
20
21
22
23
23
23
22
21
21
19
18
17
16
15

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

60
66
75
79
84
87
82
72
62
57
45
36
31
29
29
27
29
33
38
42
51
55
62
73

Pressure (mb)

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

Ozone (du)

307
306
307
311
317
325
330
337
340
347
350
352
349
345
344
345
344
343
345
350
350
348
350
348

Thursday 20

First Quarter 56%

15:38

22:40

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 OK
00 Bad

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)

11
19
51
68
78
82
81
79
78
65
84
94
94
95
95
91
77
85
80
76
71
60
40
55

Low Clouds (% Sky Obscured)

2
2
17
23
23
5
15
26
34
40
72
89
85
83
79
78
66
73
67
61
58
53
38
55

Medium Clouds (% Sky Obscured)

6
10
51
68
26
13
14
16
18
16
13
11
18
22
27
23
19
15
10
9
10
0
4
3

High Clouds (% Sky Obscured)

0
0
0
15
30
50
57
58
54
40
20
2
1
1
2
1
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
None
None
None
None
None
None
None

Precipitation Probability (%)

0
0
4
2
2
3
10
12
10
25
30
31
30
35
41
43
46
44
38
34
25
16
12
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
9
9
10
10
9
9
10
12
12
12
12
12
12
11
11
9
9
8
6
6
8
8
7

Chance of Frost

Temperature (°C)

14
14
13
13
13
13
13
15
17
19
19
20
20
20
20
20
20
20
19
18
17
16
15
14

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

78
78
79
80
84
89
86
76
65
53
45
43
44
45
42
43
43
40
44
47
59
68
72
74

Pressure (mb)

1006
1006
1006
1006
1005
1005
1005
1005
1005
1005
1005
1005
1005
1005
1005
1004
1004
1004
1005
1005
1005
1006
1006
1006

Ozone (du)

349
349
349
348
347
347
347
346
347
347
347
350
351
351
350
350
350
350
349
348
348
346
346
345

Friday 21

Waxing Gibbous 66%

16:43

23:18

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: 05:56, 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)

59
65
76
75
73
83
80
84
84
80
68
62
73
86
93
85
86
88
91
95
100
94
87
80

Low Clouds (% Sky Obscured)

59
65
76
75
72
80
69
79
77
71
43
39
44
54
68
77
86
88
91
95
97
86
74
63

Medium Clouds (% Sky Obscured)

4
4
4
4
4
4
8
12
19
13
9
5
13
20
24
9
5
3
8
12
12
21
24
21

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
17
33
35
22
12
5
14
29
60
53
54
48

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
Very Light Rain
Very Light Rain
Very Light Rain
None
None
None
None
None
None
None

Precipitation Probability (%)

4
6
7
12
13
7
15
18
17
22
24
24
51
52
56
59
57
49
39
27
4
6
4
0

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.3
0.3
0.2
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

7
7
7
7
7
6
7
8
8
7
7
8
8
8
8
8
8
7
7
6
7
8
8
8

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

11
10
11
10
10
10
10
11
11
13
14
16
17
17
17
17
16
16
16
15
15
15
15
14

Dew Point (°C)

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

Relative Humidity (%)

68
69
75
79
86
90
76
71
64
55
42
34
32
31
31
31
31
32
33
36
39
43
50
58

Pressure (mb)

1007
1007
1007
1007
1007
1008
1008
1009
1009
1010
1010
1010
1010
1010
1010
1010
1011
1011
1011
1012
1012
1013
1013
1014

Ozone (du)

344
346
346
346
346
346
347
347
347
348
348
349
350
349
348
347
346
345
344
341
338
334
334
333

Saturday 22

Waxing Gibbous 75%

17:38

00:10

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 OK
23 OK
00 OK

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)

80
79
78
81
85
89
77
68
60
62
64
66
65
59
56
59
58
59
53
50
48
40
40
33

Low Clouds (% Sky Obscured)

64
65
66
76
84
89
76
60
46
39
33
26
31
35
40
51
58
59
53
50
48
40
40
33

Medium Clouds (% Sky Obscured)

20
11
10
12
13
13
14
10
8
12
16
16
11
8
6
8
9
10
13
15
18
12
7
0

High Clouds (% Sky Obscured)

35
17
2
3
3
3
2
2
1
2
3
3
8
9
10
5
5
10
8
6
5
7
9
9

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
8
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
1
0
3
4
1
11
9
4
11
10
5
7
7
7
8
8
6
4
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
8
8
8
8
8
8
8
9
9
7
6
7
6
6
6
6
5
5
6
6
7
7
6

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

15
9
10
10
10
9
9
10
10
10
11
12
12
18
18
18
19
19
19
16
15
14
14
13

Dew Point (°C)

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

Relative Humidity (%)

67
70
72
72
70
66
63
58
53
50
45
41
37
34
32
30
35
41
47
51
57
62
65
69

Pressure (mb)

1014
1014
1015
1015
1015
1016
1016
1016
1017
1017
1017
1017
1017
1017
1017
1017
1018
1018
1018
1019
1020
1020
1020
1021

Ozone (du)

333
333
334
334
334
334
334
334
334
334
336
337
338
339
340
342
342
343
343
342
341
340
339
338

Sunday 23

Waxing Gibbous 83%

18:21

No Set

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)

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: 17/08/26 00:37:42. Forecast: 17/08/26 to 23/08/26. Timezone: UTC+1.00