Clear Outside v1.0 - International Weather Forecasts For Astronomers

Friday 5

Waning Gibbous 98%

15:42

09:02

05 OK
06 OK
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
03 Bad
04 Bad

Sun - Rise: 07:51, Set: 15:51, Transit: 11:51. Moon - Rise: 15:42, Set: 09:02. Civil Dark: 16:31 - 07:12. Nautical Dark: 17:14 - 06:29. Astro Dark: 17:55 - 05:48

Total Clouds (% Sky Obscured)

12
26
62
100
100
71
100
99
98
99
100
100
100
95
100
100
100
85
90
85
77
100
100
100

Low Clouds (% Sky Obscured)

12
26
22
27
34
0
31
45
66
57
50
71
99
90
100
100
100
76
82
75
68
70
70
75

Medium Clouds (% Sky Obscured)

0
26
31
100
64
71
100
97
98
99
100
100
100
95
97
19
11
15
51
85
43
100
100
100

High Clouds (% Sky Obscured)

10
26
50
82
88
58
55
60
57
85
100
100
47
60
45
0
0
2
21
6
5
100
100
100

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
8
9
4
2
8
6
9
9
9
9
9
8
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
Very Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Very Light Rain
None
Light Rain
Light Rain
None
None
None
Light Rain

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
23
69
95
95
95
95
55
43
66
62
32
33
33
62

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0.3
1.2
1.3
0.7
1.2
0.2
0
0.6
0.4
0
0
0
0.4

Wind Speed/Direction (mph)

4
4
4
6
6
8
10
11
13
15
16
19
20
21
21
23
21
16
15
14
15
15
16
17

Chance of Frost

Temperature (°C)

0
0
1
2
2
4
5
6
7
7
8
7
7
7
6
6
7
8
9
9
9
9
9
9

Feels Like (°C)

-2
-1
-1
-2
-1
-0
1
2
2
2
2
1
0
-1
-1
-2
1
3
4
4
4
4
4
3

Dew Point (°C)

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

Relative Humidity (%)

89
91
89
88
85
80
76
74
75
78
75
74
75
87
90
90
93
87
85
85
81
81
82
81

Pressure (mb)

1006
1007
1007
1007
1007
1007
1006
1006
1004
1003
1002
1001
1000
998
997
995
994
994
993
993
993
993
992
992

Ozone (du)

348
344
339
331
326
326
323
317
312
308
300
294
294
295
295
297
299
300
299
297
298
292
291
292

Saturday 6

Waning Gibbous 93%

16:55

10:10

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
03 Bad
04 Bad

Sun - Rise: 07:52, Set: 15:51, Transit: 11:52. Moon - Rise: 16:55, Set: 10:10. Civil Dark: 16:31 - 07:13. Nautical Dark: 17:14 - 06:30. Astro Dark: 17:54 - 05:49

Total Clouds (% Sky Obscured)

100
91
92
100
97
100
100
93
86
92
90
98
76
74
66
64
75
92
60
87
62
62
97
95

Low Clouds (% Sky Obscured)

70
68
65
62
63
78
75
84
72
76
70
75
62
58
64
61
58
54
34
46
51
44
33
51

Medium Clouds (% Sky Obscured)

100
87
26
68
42
96
100
93
86
34
90
48
69
73
46
3
0
0
0
0
0
17
58
90

High Clouds (% Sky Obscured)

100
71
48
96
51
100
100
81
12
31
40
2
1
2
0
5
23
38
26
78
41
37
72
67

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
8
9
9
9
9
5
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

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

Precipitation Probability (%)

53
8
2
3
15
26
42
39
39
24
13
25
48
38
30
16
1
0
0
0
0
0
0
0

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

17
17
17
17
17
17
19
19
19
20
20
20
20
20
19
19
19
17
15
14
13
11
9
8

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

81
84
82
77
78
82
83
84
81
80
80
78
77
80
78
77
80
80
81
84
85
88
91
94

Pressure (mb)

992
993
993
994
994
995
995
995
995
996
996
997
998
999
1000
1001
1002
1002
1003
1003
1004
1004
1005
1004

Ozone (du)

290
290
286
286
285
284
283
282
281
279
278
278
280
286
288
289
289
289
289
290
291
290
286
286

Sunday 7

Waning Gibbous 86%

18:21

10:56

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
03 Bad
04 Bad

Sun - Rise: 07:54, Set: 15:51, Transit: 11:52. Moon - Rise: 18:21, Set: 10:56. Civil Dark: 16:30 - 07:14. Nautical Dark: 17:14 - 06:31. Astro Dark: 17:54 - 05:50

Total Clouds (% Sky Obscured)

100
100
94
100
100
100
100
100
100
100
100
100
100
99
99
96
100
73
57
53
50
49
66
69

Low Clouds (% Sky Obscured)

57
49
70
99
93
82
96
99
91
94
92
87
77
88
86
79
100
58
40
40
41
35
39
40

Medium Clouds (% Sky Obscured)

90
85
71
84
96
100
100
100
99
100
100
100
96
79
16
25
19
15
15
12
6
0
0
0

High Clouds (% Sky Obscured)

100
100
77
100
100
100
100
100
100
100
98
100
100
56
61
78
20
0
5
1
2
5
10
10

ISS Passover

Visibility (miles)

9
9
9
9
9
3
2
2
3
0
5
9
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

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

Precipitation Probability (%)

0
1
3
29
54
95
95
95
95
95
93
47
53
15
12
11
22
22
4
4
1
0
0
0

Precipitation Amount (mm)

0
0
0
0
0
0.9
1.1
1
1.1
0.9
0.6
0
0.3
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

7
6
6
6
7
8
10
12
13
12
13
15
15
17
17
17
19
19
17
15
14
14
13
12

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

5
5
6
6
7
9
9
10
10
11
11
11
12
12
12
11
10
8
8
7
8
7
7
7

Relative Humidity (%)

93
93
94
93
95
98
98
96
96
98
95
95
95
95
95
87
83
77
80
83
87
87
90
91

Pressure (mb)

1004
1004
1004
1004
1003
1003
1002
1001
1000
999
998
997
997
997
997
998
999
1000
1002
1002
1003
1004
1005
1005

Ozone (du)

286
284
284
284
284
284
284
284
286
288
288
292
293
298
302
305
305
305
303
302
302
301
300
304

Monday 8

Waning Gibbous 77%

19:50

11:26

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
03 Bad
04 Bad

Sun - Rise: 07:55, Set: 15:50, Transit: 11:53. Moon - Rise: 19:50, Set: 11:26. Civil Dark: 16:30 - 07:15. Nautical Dark: 17:13 - 06:32. Astro Dark: 17:54 - 05:51

Total Clouds (% Sky Obscured)

76
84
93
100
95
91
88
92
96
100
97
98
97
98
99
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

52
61
63
76
73
44
55
52
49
47
50
51
56
61
65
71
72
75
75
78
80
84
84
85

Medium Clouds (% Sky Obscured)

0
0
0
0
7
12
16
29
63
37
54
27
29
31
40
85
90
95
100
100
100
100
100
100

High Clouds (% Sky Obscured)

10
37
68
100
77
55
36
57
80
100
72
48
22
55
81
100
100
100
100
100
100
100
100
100

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
3
4
4
7
3
5
3

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

Precipitation Probability (%)

0
1
0
0
0
0
0
0
1
1
6
11
18
25
19
6
30
57
65
52
65
84
95
95

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.3
0.3
0
0.3
0.5
1
1.3

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

9
9
10
10
11
11
12
12
12
12
12
11
11
11
11
11
11
11
11
11
11
11
11
11

Feels Like (°C)

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

Dew Point (°C)

8
9
9
9
9
8
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10

Relative Humidity (%)

93
95
93
95
87
83
87
86
84
87
89
92
93
95
95
95
96
96
95
95
93
95
93
93

Pressure (mb)

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

Ozone (du)

307
309
318
325
329
331
334
336
339
338
337
331
332
332
329
327
325
320
316
311
310
307
306
300

Tuesday 9

Waning Gibbous 67%

21:16

11:46

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
03 Bad
04 Bad

Sun - Rise: 07:56, Set: 15:50, Transit: 11:53. Moon - Rise: 21:16, Set: 11:46. Civil Dark: 16:30 - 07:16. Nautical Dark: 17:13 - 06:33. Astro Dark: 17:54 - 05:52

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
97
94
91
98
96
94
85
79
72
65
59
52
49
47

Low Clouds (% Sky Obscured)

83
84
85
88
85
83
81
88
94
100
92
83
75
84
79
73
67
62
56
55
53
52
49
44

Medium Clouds (% Sky Obscured)

100
100
99
99
99
90
87
96
92
69
85
66
73
81
71
58
47
35
23
36
48
52
40
26

High Clouds (% Sky Obscured)

100
100
100
100
100
100
100
99
97
96
83
66
48
56
29
2
1
1
0
0
0
0
0
0

ISS Passover

Visibility (miles)

9
8
9
3
3
7
9
6
7
9
8
9
7
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

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

Precipitation Probability (%)

95
95
95
95
95
95
95
95
85
63
59
46
39
47
40
37
31
26
25
30
26
4
10
9

Precipitation Amount (mm)

1.2
0.8
0.9
1.3
1.2
0.9
1
0.7
0.5
0.3
0.3
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

93
95
93
92
93
92
92
90
92
90
86
84
84
83
80
78
75
76
77
81
80
80
81
81

Pressure (mb)

1005
1004
1003
1003
1002
1002
1002
1001
1001
1001
1000
1000
1000
1001
998
998
998
999
1001
1002
1002
1003
1003
1003

Ozone (du)

296
295
292
290
289
288
288
285
285
283
282
281
280
281
280
279
279
280
280
281
281
281
281
282

Wednesday 10

Waning Gibbous 64%

22:36

12:01

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 OK
00 OK
01 OK
02 OK
03 OK
04 OK

Sun - Rise: 07:57, Set: 15:50, Transit: 11:53. Moon - Rise: 22:36, Set: 12:01. Civil Dark: 16:30 - 07:17. Nautical Dark: 17:13 - 06:34. Astro Dark: 17:54 - 05:53

Total Clouds (% Sky Obscured)

43
53
62
72
71
70
70
62
57
51
53
55
61
67
66
66
54
43
35
31
28
26
33
39

Low Clouds (% Sky Obscured)

33
46
59
71
71
70
70
62
57
49
53
55
61
67
66
66
51
43
35
31
28
26
32
35

Medium Clouds (% Sky Obscured)

21
16
10
3
2
1
1
5
8
7
4
2
1
0
0
0
1
3
4
5
6
8
6
5

High Clouds (% Sky Obscured)

0
0
1
1
9
13
15
10
7
0
0
0
0
0
0
0
0
0
0
1
2
3
9
15

ISS Passover

Visibility (miles)

9
9
8
7
7
7
8
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
11
16
24
32
37
34
30
18
2
2
1
0
1
1
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)

13
13
14
14
15
13
16
21
18
16
14
14
13
13
12
11
11
10
9
8
8
7
6
6

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

80
81
82
85
88
85
84
84
81
80
78
80
82
85
87
88
88
88
90
90
90
93
93
94

Pressure (mb)

1003
1003
1003
1003
1003
1004
1005
1005
1007
1008
1010
1011
1012
1013
1013
1014
1015
1015
1016
1016
1016
1017
1017
1017

Ozone (du)

283
285
286
288
289
290
290
291
297
303
310
311
312
314
312
311
310
309
308
307
305
303
302
301

Thursday 11

Third Quarter 57%

23:52

12:12

Sun - Rise: 07:58, Set: 15:50, Transit: 11:54. Moon - Rise: 23:52, Set: 12:12. Civil Dark: 16:30 - 07:18. Nautical Dark: 17:13 - 06:34. Astro Dark: 17:54 - 05:54

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: 05/12/25 05:07:14. Forecast: 05/12/25 to 11/12/25. Timezone: UTC+0.00