Clear Outside v1.0 - International Weather Forecasts For Astronomers

Monday 21

Waxing Gibbous 77%

17:17

01:21

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

Sun - Rise: 06:47, Set: 19:01, Transit: 12:53. Moon - Rise: 17:17, Set: 01:21. Civil Dark: 19:34 - 06:14. Nautical Dark: 20:14 - 05:34. Astro Dark: 20:56 - 04:53

Total Clouds (% Sky Obscured)

17
18
25
28
41
50
63
41
37
33
45
34
44
66
61
39
31
42
35
48
39
45
56
55

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
4
16
34
24
41
34
43
65
60
34
29
41
35
48
35
34
44
48

Medium Clouds (% Sky Obscured)

17
14
14
14
14
18
16
9
14
17
4
0
0
0
0
7
11
3
3
7
12
15
24
21

High Clouds (% Sky Obscured)

17
18
25
28
26
28
33
17
2
2
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)

1
1
2
3
5
4
4
6
5
4
3
2
2
2
2
2
3
3
3
3
3
2
2
3

Chance of Frost

Temperature (°C)

9
13
16
18
18
19
20
21
21
21
20
19
19
18
17
16
16
15
15
15
15
15
15
15

Feels Like (°C)

7
12
14
16
17
19
19
19
21
22
22
21
20
19
18
17
17
17
16
17
17
17
17
17

Dew Point (°C)

2
4
5
4
3
4
6
8
9
9
11
12
12
12
11
11
11
11
11
12
13
13
13
13

Relative Humidity (%)

61
55
48
40
36
35
38
42
45
47
55
61
65
67
67
68
72
74
76
80
86
89
90
90

Pressure (mb)

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

Ozone (du)

274
274
274
273
272
271
272
272
272
270
269
270
270
271
271
271
271
270
270
270
269
268
266
267

Tuesday 22

Waxing Gibbous 85%

17:36

02:38

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
07 Bad

Sun - Rise: 06:49, Set: 18:58, Transit: 12:53. Moon - Rise: 17:36, Set: 02:38. Civil Dark: 19:32 - 06:16. Nautical Dark: 20:12 - 05:36. Astro Dark: 20:53 - 04:55

Total Clouds (% Sky Obscured)

63
56
61
66
76
76
83
83
92
93
95
92
93
92
92
93
93
95
93
98
100
99
89
92

Low Clouds (% Sky Obscured)

48
53
50
46
60
65
70
78
92
92
94
92
93
87
86
85
89
89
91
88
91
81
76
71

Medium Clouds (% Sky Obscured)

16
29
35
39
35
30
28
18
14
15
15
14
14
13
14
19
15
12
7
8
8
6
8
8

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
4
14
13
35
27
35
45
72
87
91
22
59

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
6
8
9
5
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
1
0
0
0
0
0
0
1
2
2
3
2
4
17
24
22
18
19
13

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

18
19
20
22
22
21
22
22
22
22
21
21
20
20
19
18
18
17
18
17
17
16
16
16

Dew Point (°C)

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

Relative Humidity (%)

86
77
70
63
58
53
51
51
50
52
57
60
62
64
65
69
69
71
73
81
89
86
89
89

Pressure (mb)

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

Ozone (du)

267
268
268
268
269
269
269
270
270
271
272
273
274
274
275
275
276
278
279
279
279
280
282
282

Wednesday 23

Waxing Gibbous 92%

17:51

03:55

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

Sun - Rise: 06:51, Set: 18:56, Transit: 12:53. Moon - Rise: 17:51, Set: 03:55. Civil Dark: 19:30 - 06:17. Nautical Dark: 20:09 - 05:38. Astro Dark: 20:50 - 04:57

Total Clouds (% Sky Obscured)

92
98
75
87
96
34
51
51
51
6
25
34
60
66
39
49
79
62
87
90
88
87
84
63

Low Clouds (% Sky Obscured)

45
26
62
69
76
27
49
46
51
1
25
34
57
63
39
46
42
38
41
36
38
43
36
28

Medium Clouds (% Sky Obscured)

10
18
75
81
9
7
1
5
1
2
0
0
0
0
0
0
0
0
0
0
0
0
0
1

High Clouds (% Sky Obscured)

18
78
27
33
76
5
0
0
0
0
0
0
0
0
2
8
18
21
44
58
53
41
32
43

ISS Passover

Visibility (miles)

8
9
9
9
9
9
9
9
9
6
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 (%)

5
7
8
20
19
30
24
16
10
11
1
4
3
0
2
1
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
6
7
7
8
7
8
9
10
10
8
8
8
8
9
8
7
6
6
6
6
5
5
5

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

16
16
18
19
19
20
22
20
19
18
20
18
16
14
13
14
13
12
13
11
10
11
10
11

Dew Point (°C)

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

Relative Humidity (%)

86
77
72
74
71
64
54
52
56
61
62
67
86
85
78
84
86
87
92
92
93
92
90
89

Pressure (mb)

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

Ozone (du)

282
282
283
284
287
295
303
306
308
309
310
310
309
309
306
303
301
298
297
295
294
292
293
293

Thursday 24

Waxing Gibbous 97%

18:04

05:13

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
07 Bad

Sun - Rise: 06:52, Set: 18:54, Transit: 12:52. Moon - Rise: 18:04, Set: 05:13. Civil Dark: 19:27 - 06:19. Nautical Dark: 20:07 - 05:39. Astro Dark: 20:48 - 04:59

Total Clouds (% Sky Obscured)

93
100
98
97
96
98
99
100
99
100
100
100
100
99
85
71
60
76
89
100
99
98
97
76

Low Clouds (% Sky Obscured)

24
20
27
35
41
32
21
8
5
2
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

2
5
6
5
6
6
4
3
16
28
45
34
21
11
7
8
7
5
5
5
0
0
5
5

High Clouds (% Sky Obscured)

77
100
90
83
78
86
93
100
97
97
95
96
98
99
82
60
41
63
82
100
98
97
95
70

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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

83
69
61
53
49
45
43
41
39
38
44
46
51
58
61
68
69
69
70
72
75
79
83
84

Pressure (mb)

1026
1026
1025
1025
1025
1024
1023
1022
1022
1022
1021
1021
1021
1021
1021
1021
1020
1020
1019
1019
1018
1018
1018
1018

Ozone (du)

291
289
287
287
285
284
283
282
281
281
280
279
277
278
277
276
276
276
276
276
275
275
275
276

Friday 25

Waxing Gibbous 99%

18:16

06:31

08 OK
09 Good
10 Good
11 OK
12 OK
13 Bad
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 OK
06 Good
07 OK

Sun - Rise: 06:54, Set: 18:51, Transit: 12:52. Moon - Rise: 18:16, Set: 06:31. Civil Dark: 19:25 - 06:20. Nautical Dark: 20:04 - 05:41. Astro Dark: 20:45 - 05:00

Total Clouds (% Sky Obscured)

31
4
18
30
46
49
47
48
44
31
13
7
6
5
4
1
1
0
4
5
12
20
18
31

Low Clouds (% Sky Obscured)

0
0
7
14
18
17
16
15
9
3
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

5
4
4
0
0
4
10
15
24
20
12
3
3
2
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

30
1
1
0
0
11
19
28
35
31
13
7
6
5
4
1
1
0
4
5
12
20
12
15

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
5
6
3
5
2
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)

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

Chance of Frost

Temperature (°C)

14
15
17
18
19
21
21
21
21
19
18
17
16
15
13
13
12
11
11
10
10
10
10
10

Feels Like (°C)

12
15
16
17
18
20
19
19
18
19
19
19
15
15
15
14
14
13
11
10
10
10
10
10

Dew Point (°C)

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

Relative Humidity (%)

82
72
64
54
47
40
37
34
32
37
41
47
51
55
60
63
66
70
75
78
84
82
82
81

Pressure (mb)

1018
1018
1018
1018
1018
1017
1017
1017
1016
1016
1017
1017
1017
1017
1018
1018
1017
1017
1017
1017
1016
1016
1016
1016

Ozone (du)

276
277
278
278
277
276
276
276
276
277
278
280
281
282
283
283
282
282
281
281
280
281
283
284

Saturday 26

Full Moon 100%

18:27

07:52

08 OK
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 OK
04 Bad
05 Bad
06 Bad
07 Bad

Sun - Rise: 06:55, Set: 18:49, Transit: 12:52. Moon - Rise: 18:27, Set: 07:52. Civil Dark: 19:23 - 06:22. Nautical Dark: 20:02 - 05:43. Astro Dark: 20:43 - 05:02

Total Clouds (% Sky Obscured)

47
66
76
85
94
89
82
76
74
73
69
79
90
100
98
97
95
70
49
32
42
47
57
52

Low Clouds (% Sky Obscured)

0
0
0
0
0
1
2
3
10
16
23
15
7
0
0
1
1
2
2
3
4
3
0
0

Medium Clouds (% Sky Obscured)

1
2
17
33
45
38
31
23
23
22
15
15
15
10
9
8
7
4
2
0
0
0
0
0

High Clouds (% Sky Obscured)

22
29
46
62
79
79
77
67
58
52
45
63
82
100
96
89
84
58
38
32
42
47
57
52

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
1
2
3
2
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)

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

Chance of Frost

Temperature (°C)

12
13
15
17
18
20
20
20
20
19
18
17
16
15
14
13
13
13
12
11
11
10
10
10

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

75
69
65
60
56
53
51
49
48
48
49
49
56
62
69
75
80
87
89
90
91
93
91
91

Pressure (mb)

1016
1016
1016
1016
1015
1015
1015
1015
1015
1015
1015
1015
1016
1016
1016
1016
1016
1016
1017
1017
1017
1017
1017
1017

Ozone (du)

284
284
284
284
284
285
287
289
291
293
295
298
299
300
301
302
304
305
307
309
311
312
314
316

Sunday 27

Waning Gibbous 98%

18:40

No Set

Sun - Rise: 06:57, Set: 18:47, Transit: 12:51. Moon - Rise: 18:40, Set: No Set. Civil Dark: 19:20 - 06:24. Nautical Dark: 19:59 - 05:45. Astro Dark: 20:40 - 05:04

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: 21/09/26 08:39:19. Forecast: 21/09/26 to 27/09/26. Timezone: UTC+1.00