Clear Outside v1.0 - International Weather Forecasts For Astronomers

Friday 18

First Quarter 49%

15:29

22:00

01 Good
02 Good
03 Good
04 Good
05 OK
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 OK
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: 06:41, Set: 19:08, Transit: 12:54. Moon - Rise: 15:29, Set: 22:00. Civil Dark: 19:41 - 06:07. Nautical Dark: 20:21 - 05:27. Astro Dark: 21:04 - 04:45

Total Clouds (% Sky Obscured)

4
3
9
8
14
54
70
91
87
60
41
48
53
98
100
100
100
99
100
99
95
96
100
96

Low Clouds (% Sky Obscured)

0
1
9
8
14
18
22
23
18
21
31
39
44
22
65
71
76
83
87
92
92
53
68
79

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
4
16
31
30
86
99
98
98
98
99
97
79
67
85
67

High Clouds (% Sky Obscured)

0
0
0
0
0
54
70
80
78
48
9
8
22
85
70
93
100
35
35
12
4
55
58
28

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
2
0
0
0
0
0
0
0
0
0
0
0
1
3
11
20
19
20
6
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)

6
6
5
5
7
7
7
7
8
9
11
11
13
14
14
13
13
13
14
13
13
13
13
13

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

80
83
87
88
88
90
90
83
73
67
57
52
50
48
49
52
54
59
64
61
64
66
70
73

Pressure (mb)

1012
1012
1012
1013
1013
1013
1014
1014
1014
1015
1015
1014
1014
1014
1013
1013
1013
1013
1013
1013
1014
1014
1014
1014

Ozone (du)

317
311
309
308
306
302
300
298
298
297
295
291
288
286
285
286
286
288
291
293
292
294
294
292

Saturday 19

Waxing Gibbous 59%

16:17

22:59

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: 06:42, Set: 19:05, Transit: 12:54. Moon - Rise: 16:17, Set: 22:59. Civil Dark: 19:39 - 06:09. Nautical Dark: 20:19 - 05:29. Astro Dark: 21:01 - 04:47

Total Clouds (% Sky Obscured)

98
100
97
100
100
98
100
100
97
99
90
96
94
98
99
100
100
100
100
99
100
99
100
100

Low Clouds (% Sky Obscured)

75
75
79
51
50
59
69
48
50
81
67
93
92
98
97
96
53
33
21
22
22
23
23
27

Medium Clouds (% Sky Obscured)

48
61
20
21
16
37
84
56
54
58
37
22
18
35
24
22
24
99
83
98
92
96
61
26

High Clouds (% Sky Obscured)

38
77
77
100
100
90
96
87
88
89
51
55
43
79
34
76
100
98
100
68
100
85
100
100

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
Light Rain
None
None
None
None
None

Precipitation Probability (%)

0
0
0
0
0
0
1
0
0
0
0
0
1
1
12
7
43
60
57
17
3
0
0
0

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

14
15
15
14
13
13
13
13
14
15
15
16
15
14
13
13
12
13
13
12
12
11
11
11

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

75
73
73
70
73
79
86
86
81
72
69
65
68
70
72
73
75
73
77
77
74
79
81
85

Pressure (mb)

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

Ozone (du)

291
292
292
291
292
291
291
292
292
291
292
290
290
289
289
288
286
287
288
288
289
290
289
289

Sunday 20

Waxing Gibbous 68%

16:52

00:07

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 OK
22 Bad
23 Bad
00 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)

100
100
100
100
100
100
75
100
93
100
100
100
85
96
88
69
72
94
66
54
26
54
62
76

Low Clouds (% Sky Obscured)

26
25
22
23
47
37
22
30
35
33
48
47
26
41
43
47
32
12
14
4
0
0
0
0

Medium Clouds (% Sky Obscured)

16
14
67
92
71
63
10
15
39
80
70
70
61
51
53
69
49
14
10
7
1
3
4
3

High Clouds (% Sky Obscured)

100
100
100
100
100
100
75
100
93
91
100
100
77
90
79
37
50
88
48
54
26
50
54
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
Very Light Rain
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

20
26
12
27
44
51
10
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
0.2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

14
14
14
13
12
13
12
13
12
13
13
13
14
14
14
14
14
14
13
13
11
11
9
9

Dew Point (°C)

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

Relative Humidity (%)

87
87
90
89
90
92
90
84
73
61
55
52
50
47
51
53
57
59
64
69
74
73
71
69

Pressure (mb)

1020
1021
1021
1021
1022
1022
1023
1024
1025
1026
1026
1027
1027
1027
1027
1027
1028
1028
1029
1030
1030
1030
1031
1031

Ozone (du)

290
290
290
289
288
288
288
286
284
284
284
283
282
283
282
281
281
282
284
284
284
283
280
278

Monday 21

Waxing Gibbous 77%

17:17

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: 06:46, Set: 19:01, Transit: 12:53. Moon - Rise: 17:17, Set: No Set. Civil Dark: 19:34 - 06:12. Nautical Dark: 20:14 - 05:32. Astro Dark: 20:56 - 04:51

Total Clouds (% Sky Obscured)

75
74
76
74
71
69
76
82
89
91
94
93
76
76
77
71
76
91
92
90
55
59
58
54

Low Clouds (% Sky Obscured)

0
0
0
0
7
1
31
63
75
77
55
51
47
51
58
50
61
84
86
82
38
39
40
40

Medium Clouds (% Sky Obscured)

5
5
5
7
71
69
76
39
57
20
94
67
24
22
20
29
26
29
29
25
16
13
7
4

High Clouds (% Sky Obscured)

60
57
55
45
28
15
15
11
16
14
8
8
2
2
2
2
0
2
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)

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

Chance of Frost

Temperature (°C)

10
10
10
9
9
10
10
11
13
14
15
16
18
19
20
20
20
19
19
18
18
17
16
16

Feels Like (°C)

8
8
7
7
8
8
8
9
10
12
13
15
17
19
19
19
20
19
18
18
17
18
18
17

Dew Point (°C)

6
5
5
5
5
4
4
4
6
6
7
8
9
10
10
11
11
12
13
13
13
14
14
15

Relative Humidity (%)

72
72
72
72
72
68
66
64
62
60
57
58
54
54
53
54
57
61
69
73
74
82
87
90

Pressure (mb)

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

Ozone (du)

277
277
276
274
273
272
270
270
270
270
272
272
273
273
273
272
272
274
274
275
275
276
276
275

Tuesday 22

Waxing Gibbous 85%

17:36

01:21

01 Bad
02 Bad
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

Sun - Rise: 06:47, Set: 18:58, Transit: 12:53. Moon - Rise: 17:36, Set: 01:21. Civil Dark: 19:32 - 06:14. Nautical Dark: 20:12 - 05:34. Astro Dark: 20:53 - 04:53

Total Clouds (% Sky Obscured)

48
43
39
39
40
45
57
58
67
78
91
98
95
94
94
93
94
97
99
99
100
90
80
69

Low Clouds (% Sky Obscured)

40
39
34
34
35
32
27
28
37
48
75
86
86
86
86
87
89
88
88
91
91
82
75
65

Medium Clouds (% Sky Obscured)

2
3
3
0
0
0
0
3
4
8
14
17
16
17
15
15
6
0
1
1
2
0
0
0

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
25
50
70
54
36
27
32
34
27
37
44
47
51
51
51

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
1
0
2
3
1
2
2
0
3
1
0
0
0
0
3
3
4
5
4
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
3
3
3
3
3
3
3
4
4
5
5
6
7
7
7
6
5
4
4
4
4
5
4

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

92
92
95
95
95
95
95
90
82
72
67
62
60
61
61
62
63
66
69
70
70
71
74
79

Pressure (mb)

1029
1029
1029
1029
1029
1029
1029
1029
1029
1029
1029
1029
1029
1028
1028
1028
1028
1027
1027
1027
1027
1028
1027
1027

Ozone (du)

273
274
274
273
272
272
273
272
271
270
270
270
270
271
271
272
272
272
272
273
274
275
274
274

Wednesday 23

Waxing Gibbous 92%

17:51

02:38

01 Bad
02 OK
03 OK
04 OK
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: 06:49, Set: 18:56, Transit: 12:53. Moon - Rise: 17:51, Set: 02:38. Civil Dark: 19:30 - 06:16. Nautical Dark: 20:09 - 05:36. Astro Dark: 20:50 - 04:55

Total Clouds (% Sky Obscured)

48
32
13
34
60
84
75
66
53
65
77
89
86
83
81
79
77
80
83
86
91
90
89
88

Low Clouds (% Sky Obscured)

47
30
12
33
53
74
49
25
2
1
1
0
0
0
0
0
0
0
0
0
0
0
1
1

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
4
6
9
7
4
2
1
1
0
0
0
0
0
0
0
22
44
66

High Clouds (% Sky Obscured)

26
26
13
34
58
53
70
66
53
65
77
83
81
81
81
79
77
80
83
86
91
90
89
88

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 (%)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

85
89
92
95
95
95
93
86
78
69
62
55
49
47
45
42
45
49
53
58
61
66
65
65

Pressure (mb)

1027
1027
1027
1026
1026
1027
1027
1027
1027
1027
1027
1027
1027
1027
1026
1026
1026
1026
1026
1026
1027
1027
1027
1027

Ozone (du)

274
273
273
273
274
275
276
275
275
275
276
277
277
277
277
278
278
279
279
280
281
282
286
289

Thursday 24

Waxing Gibbous 97%

18:04

03:55

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)

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: 18/09/26 01:59:48. Forecast: 18/09/26 to 24/09/26. Timezone: UTC+1.00