Clear Outside v1.0 - International Weather Forecasts For Astronomers

Sunday 20

Waxing Gibbous 68%

16:52

00:07

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 Good
22 Bad
23 OK
00 Bad
01 Bad
02 Bad

Sun - Rise: 06:44, Set: 19:03, Transit: 12:54. Moon - Rise: 16:52, Set: 00:07. Civil Dark: 19:37 - 06:11. Nautical Dark: 20:16 - 05:31. Astro Dark: 20:58 - 04:49

Total Clouds (% Sky Obscured)

47
59
67
75
100
100
97
100
100
99
83
85
83
100
100
100
98
100
15
54
39
57
95
71

Low Clouds (% Sky Obscured)

28
38
24
31
26
20
19
18
15
14
14
15
13
13
11
0
0
0
0
0
0
0
2
2

Medium Clouds (% Sky Obscured)

6
56
64
55
98
98
95
94
22
18
0
0
0
0
3
3
5
4
4
5
4
16
20
23

High Clouds (% Sky Obscured)

47
59
64
75
99
100
68
100
100
91
57
59
65
100
100
100
98
100
11
54
39
35
81
46

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 (%)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

13
13
12
11
10
10
8
7
6
5
4
3
2
2
2
3
4
4
4
4
4
4
4
4

Relative Humidity (%)

86
89
86
82
84
79
68
60
53
47
41
36
34
33
33
39
45
48
51
55
57
60
64
65

Pressure (mb)

1021
1021
1021
1022
1023
1024
1025
1026
1026
1027
1027
1027
1028
1028
1028
1029
1030
1031
1031
1031
1032
1032
1032
1032

Ozone (du)

289
291
291
291
291
291
290
289
288
286
286
286
285
286
286
286
285
285
285
283
283
282
280
279

Monday 21

Waxing Gibbous 77%

17:17

01:21

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

Sun - Rise: 06:46, Set: 19:01, Transit: 12:53. Moon - Rise: 17:17, Set: 01:21. Civil Dark: 19:34 - 06:12. Nautical Dark: 20:14 - 05:32. Astro Dark: 20:56 - 04:51

Total Clouds (% Sky Obscured)

73
94
80
51
75
39
59
58
63
61
44
43
41
37
63
42
34
57
86
41
44
44
46
41

Low Clouds (% Sky Obscured)

0
0
45
24
32
5
22
30
30
25
13
21
23
24
55
30
18
42
75
29
29
32
30
32

Medium Clouds (% Sky Obscured)

24
28
27
22
59
21
33
18
12
12
13
11
11
8
9
9
8
10
9
4
9
5
9
9

High Clouds (% Sky Obscured)

59
88
47
10
7
4
2
1
0
1
1
1
2
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)

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

Chance of Frost

Temperature (°C)

10
10
10
10
10
11
13
15
17
18
18
20
21
22
22
21
20
19
18
18
18
17
17
16

Feels Like (°C)

9
9
8
9
10
10
13
14
16
17
18
19
20
22
22
21
21
21
19
18
19
18
19
18

Dew Point (°C)

4
4
4
4
4
4
4
3
2
2
3
6
9
10
11
12
13
13
12
12
13
13
13
14

Relative Humidity (%)

66
67
66
66
66
59
53
44
37
35
36
40
45
48
51
56
66
68
67
65
72
77
81
83

Pressure (mb)

1032
1032
1032
1032
1032
1033
1033
1033
1032
1032
1032
1031
1031
1030
1030
1030
1030
1030
1030
1030
1030
1030
1030
1030

Ozone (du)

279
278
278
278
277
276
274
273
272
271
271
270
271
270
269
268
267
267
268
268
267
267
268
268

Tuesday 22

Waxing Gibbous 85%

17:36

02:38

03 OK
04 OK
05 OK
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
01 Bad
02 Bad

Sun - Rise: 06:47, Set: 18:58, Transit: 12:53. Moon - Rise: 17:36, Set: 02:38. Civil Dark: 19:32 - 06:14. Nautical Dark: 20:12 - 05:34. Astro Dark: 20:53 - 04:53

Total Clouds (% Sky Obscured)

42
46
46
52
52
56
59
64
70
58
68
73
80
79
79
78
83
88
93
92
91
89
93
96

Low Clouds (% Sky Obscured)

42
43
41
44
51
50
50
56
70
58
63
64
65
67
66
70
73
70
75
80
82
88
87
86

Medium Clouds (% Sky Obscured)

12
12
18
15
22
21
21
21
18
23
18
11
8
5
3
3
4
4
5
5
5
5
4
3

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
2
2
4
2
5
1
13
27
40
27
18
7
48
68

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
5
2
3
9
10
5
4
2
2
4
2
0
8
9
4
8
18

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

14
14
14
14
14
13
13
12
12
12
12
12
12
12
12
12
12
12
12
12
12
13
12
12

Relative Humidity (%)

86
86
87
87
89
82
72
64
60
55
52
50
49
50
53
55
57
58
60
63
68
70
70
70

Pressure (mb)

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

Ozone (du)

267
268
268
268
269
271
273
274
275
275
277
278
279
278
277
277
277
277
276
276
276
276
278
280

Wednesday 23

Waxing Gibbous 92%

17:51

No Set

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 Good
19 Good
20 Good
21 Good
22 OK
23 Bad
00 Bad
01 Bad
02 Bad

Sun - Rise: 06:49, Set: 18:56, Transit: 12:53. Moon - Rise: 17:51, Set: No Set. Civil Dark: 19:30 - 06:16. Nautical Dark: 20:09 - 05:36. Astro Dark: 20:50 - 04:55

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
96
92
61
53
20
0
7
8
13
27
86
100
100
99

Low Clouds (% Sky Obscured)

84
82
81
81
76
73
73
75
38
42
46
46
36
25
12
0
1
1
2
1
1
0
0
0

Medium Clouds (% Sky Obscured)

3
3
1
0
6
11
20
28
16
12
16
17
13
9
3
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

96
88
95
73
100
100
100
100
100
100
82
70
13
19
2
0
6
8
13
27
77
100
100
99

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 (%)

7
5
5
2
2
1
0
9
14
21
47
45
29
20
10
4
3
2
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
5
5
5
5
6
7
9
10
10
11
10
11
14
15
13
13
11
11
10
8
7
6
6

Chance of Frost

Temperature (°C)

18
17
17
17
17
17
18
19
20
21
21
21
21
21
19
17
16
15
14
13
12
11
11
10

Feels Like (°C)

17
16
16
15
16
16
17
17
18
19
19
19
18
19
15
14
13
12
11
11
11
8
9
8

Dew Point (°C)

12
11
11
11
11
12
13
13
13
12
11
10
9
7
9
8
7
5
4
5
5
7
8
7

Relative Humidity (%)

68
67
68
69
71
72
73
70
65
58
51
48
45
41
53
52
57
51
53
58
64
75
81
83

Pressure (mb)

1024
1024
1023
1023
1023
1023
1022
1022
1022
1021
1021
1021
1020
1020
1021
1022
1023
1023
1024
1025
1025
1025
1026
1026

Ozone (du)

280
280
279
279
279
279
279
279
281
283
285
285
288
294
298
300
300
301
301
301
301
301
300
299

Thursday 24

Waxing Gibbous 97%

18:04

03:55

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
01 Bad
02 Bad

Sun - Rise: 06:51, Set: 18:54, Transit: 12:52. Moon - Rise: 18:04, Set: 03:55. Civil Dark: 19:27 - 06:17. Nautical Dark: 20:07 - 05:38. Astro Dark: 20:48 - 04:57

Total Clouds (% Sky Obscured)

88
99
100
100
94
92
92
81
71
57
70
83
94
94
93
93
88
86
88
84
80
76
64
52

Low Clouds (% Sky Obscured)

0
0
0
0
31
27
26
19
12
8
7
7
9
10
8
7
3
2
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

0
2
8
15
1
1
2
2
2
2
2
1
1
3
4
6
4
1
0
1
3
4
4
7

High Clouds (% Sky Obscured)

88
99
100
100
42
67
74
65
54
42
59
73
82
78
77
77
74
70
68
59
51
39
46
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
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
5
5
5
6
4
3
3
4
6
7
7
7
8
7
7
7
7
7
6
6
6
5
5

Chance of Frost

Temperature (°C)

10
10
9
9
9
11
12
13
15
16
17
18
18
19
18
17
16
15
14
13
13
13
12
12

Feels Like (°C)

8
8
7
7
6
8
8
8
8
9
9
17
16
16
17
17
17
13
12
12
12
11
11
10

Dew Point (°C)

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

Relative Humidity (%)

82
84
84
84
85
76
67
60
51
44
39
38
37
36
40
46
52
58
66
74
75
76
77
80

Pressure (mb)

1026
1026
1026
1026
1026
1025
1026
1026
1025
1025
1024
1023
1023
1022
1022
1022
1022
1022
1022
1022
1021
1021
1021
1020

Ozone (du)

297
295
293
291
290
289
288
287
285
284
283
282
280
279
278
277
276
276
276
275
275
275
275
275

Friday 25

Waxing Gibbous 99%

18:16

05:13

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 OK
19 OK
20 Good
21 Good
22 Good
23 Good
00 OK
01 OK
02 OK

Sun - Rise: 06:52, Set: 18:51, Transit: 12:52. Moon - Rise: 18:16, Set: 05:13. Civil Dark: 19:25 - 06:19. Nautical Dark: 20:04 - 05:39. Astro Dark: 20:45 - 04:59

Total Clouds (% Sky Obscured)

44
68
73
78
73
73
68
72
71
70
70
70
80
64
44
23
17
8
0
7
13
20
27
36

Low Clouds (% Sky Obscured)

0
0
0
0
1
1
1
4
8
8
10
12
19
18
12
8
6
4
0
4
9
13
14
12

Medium Clouds (% Sky Obscured)

7
11
12
8
7
3
3
7
8
15
20
25
30
20
10
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

44
62
58
50
59
59
49
53
56
55
54
51
45
34
18
0
0
0
0
1
1
1
4
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
3
7
16
28
40
47
44
23
12
4
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
5
5
4
4
5
6
6
6
7
8
8
9
11
9
8
6
6
6
6
6
6
6
6

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

81
84
84
84
84
72
62
53
45
38
33
29
26
24
29
36
44
51
58
67
71
73
76
78

Pressure (mb)

1020
1020
1019
1019
1019
1019
1019
1019
1018
1018
1018
1017
1017
1017
1018
1018
1018
1018
1019
1019
1019
1019
1019
1019

Ozone (du)

275
275
275
275
275
276
276
277
276
276
276
276
277
277
278
279
280
280
281
281
281
281
281
281

Saturday 26

Full Moon 100%

18:27

06:31

Sun - Rise: 06:54, Set: 18:49, Transit: 12:52. Moon - Rise: 18:27, Set: 06:31. Civil Dark: 19:23 - 06:20. Nautical Dark: 20:02 - 05:41. Astro Dark: 20:43 - 05:00

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: 20/09/26 03:27:53. Forecast: 20/09/26 to 26/09/26. Timezone: UTC+1.00