Clear Outside v1.0 - International Weather Forecasts For Astronomers

Monday 31

Waning Gibbous 83%

20:32

No Set

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 Good
05 OK
06 OK
07 OK
08 OK
09 OK
10 OK

Sun - Rise: 06:13, Set: 19:49, Transit: 13:01. Moon - Rise: 20:32, Set: No Set. Civil Dark: 20:24 - 05:38. Nautical Dark: 21:08 - 04:55. Astro Dark: 21:56 - 04:08

Total Clouds (% Sky Obscured)

38
57
89
94
89
59
78
100
83
95
96
97
72
53
85
78
32
17
26
27
39
38
30
46

Low Clouds (% Sky Obscured)

38
57
59
62
78
49
70
73
60
6
0
35
0
0
0
0
0
0
0
0
0
0
0
4

Medium Clouds (% Sky Obscured)

6
9
15
15
13
0
4
0
3
75
90
70
27
24
85
75
23
13
15
14
27
28
6
31

High Clouds (% Sky Obscured)

0
0
0
0
0
4
47
100
68
91
87
91
65
35
3
0
0
0
4
5
3
4
16
14

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 (%)

11
1
0
1
1
3
2
7
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)

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

Chance of Frost

Temperature (°C)

18
20
21
22
22
21
21
20
20
18
17
16
15
14
13
12
12
12
12
11
11
13
15
17

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

68
68
64
59
59
59
59
62
62
65
65
66
67
73
75
76
79
80
81
81
80
69
60
58

Pressure (mb)

1010
1011
1011
1012
1013
1013
1014
1014
1015
1016
1017
1018
1019
1019
1019
1019
1019
1019
1020
1020
1020
1021
1021
1021

Ozone (du)

338
334
331
328
325
323
321
318
316
316
316
318
319
319
318
317
315
316
316
315
314
314
315
316

Tuesday 1

Waning Gibbous 74%

20:49

11:35

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

Sun - Rise: 06:15, Set: 19:47, Transit: 13:00. Moon - Rise: 20:49, Set: 11:35. Civil Dark: 20:22 - 05:40. Nautical Dark: 21:05 - 04:57. Astro Dark: 21:53 - 04:10

Total Clouds (% Sky Obscured)

66
77
69
51
35
68
100
100
100
100
100
100
30
30
49
52
34
64
60
100
96
100
100
100

Low Clouds (% Sky Obscured)

4
29
36
20
11
60
7
0
0
0
0
2
3
3
13
16
19
18
14
12
11
17
11
63

Medium Clouds (% Sky Obscured)

5
15
27
29
13
23
22
26
36
92
44
67
30
30
49
52
4
4
10
11
18
27
34
42

High Clouds (% Sky Obscured)

45
50
3
3
3
52
100
100
100
100
97
99
30
30
23
3
8
64
55
100
75
100
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
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
5
21

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
9
10
11
11
11
13
10
8
6
7
7
7
6
6
6
5
5
5
5
5
6
7
9

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

53
49
46
41
38
37
43
48
51
57
61
67
69
70
73
75
78
86
89
90
86
79
68
57

Pressure (mb)

1021
1021
1020
1020
1019
1019
1019
1019
1019
1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
1020
1021
1021

Ozone (du)

316
317
319
318
317
316
316
318
318
318
318
319
320
321
321
319
317
311
307
306
305
303
301
299

Wednesday 2

Waning Gibbous 63%

21:11

13:02

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
08 Bad
09 Bad
10 Bad

Sun - Rise: 06:17, Set: 19:45, Transit: 13:00. Moon - Rise: 21:11, Set: 13:02. Civil Dark: 20:20 - 05:42. Nautical Dark: 21:02 - 04:59. Astro Dark: 21:50 - 04:13

Total Clouds (% Sky Obscured)

98
100
100
99
100
100
97
91
64
54
53
97
92
86
96
93
97
96
92
90
91
93
95
96

Low Clouds (% Sky Obscured)

51
81
81
79
86
75
91
84
60
42
37
89
90
83
68
52
75
77
70
76
79
76
79
76

Medium Clouds (% Sky Obscured)

96
89
73
97
100
99
81
8
16
13
14
15
15
4
68
78
85
78
33
15
57
82
85
74

High Clouds (% Sky Obscured)

39
76
83
39
87
79
40
16
33
50
53
36
35
29
33
50
57
81
77
60
51
35
56
59

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 (%)

19
5
1
10
12
4
1
0
0
0
0
9
0
0
0
0
3
3
7
3
18
19
17
9

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)

10
11
9
9
12
9
13
12
13
12
11
12
12
11
11
11
10
10
10
11
11
11
12
12

Chance of Frost

Temperature (°C)

18
19
19
19
20
19
20
19
19
18
18
18
18
18
18
18
18
18
18
18
18
18
19
20

Feels Like (°C)

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

Dew Point (°C)

8
9
11
9
8
10
10
11
12
13
14
15
16
16
16
16
16
16
16
16
16
17
17
18

Relative Humidity (%)

51
52
59
52
46
55
52
57
63
72
77
83
85
89
90
90
92
88
88
89
89
89
86
88

Pressure (mb)

1021
1021
1020
1020
1019
1019
1019
1018
1018
1018
1018
1018
1018
1019
1019
1018
1018
1018
1018
1018
1018
1018
1018
1018

Ozone (du)

297
297
296
294
294
295
296
296
295
294
294
294
293
292
290
289
288
288
288
287
286
285
284
284

Thursday 3

Waning Gibbous 51%

21:43

14:28

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
08 Bad
09 Bad
10 Bad

Sun - Rise: 06:18, Set: 19:42, Transit: 13:00. Moon - Rise: 21:43, Set: 14:28. Civil Dark: 20:17 - 05:44. Nautical Dark: 21:00 - 05:01. Astro Dark: 21:47 - 04:15

Total Clouds (% Sky Obscured)

97
97
98
99
99
98
98
93
84
85
78
81
87
94
93
93
93
95
98
100
100
100
100
99

Low Clouds (% Sky Obscured)

73
73
75
73
65
62
66
63
54
85
78
81
83
83
84
87
90
90
90
91
59
66
95
87

Medium Clouds (% Sky Obscured)

38
42
78
18
74
51
17
20
13
7
5
13
26
94
68
83
73
75
85
94
96
98
100
99

High Clouds (% Sky Obscured)

62
64
46
31
15
17
14
11
9
12
21
2
2
30
30
32
40
63
83
100
89
82
71
65

ISS Passover

Visibility (miles)

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

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

Precipitation Probability (%)

6
18
25
49
54
59
64
54
52
33
49
54
46
73
16
15
10
24
41
44
32
62
60
58

Precipitation Amount (mm)

0
0
0
0
0
0.2
0.3
0.2
0.3
0
0.2
0.3
0.2
0.9
0
0
0
0
0
0
0
0.4
0.3
0.3

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

18
18
18
18
18
18
18
19
19
19
18
17
17
17
17
17
17
16
16
16
17
17
17
18

Relative Humidity (%)

85
80
79
76
72
72
75
81
84
89
88
86
88
89
90
90
92
90
90
89
90
90
90
91

Pressure (mb)

1018
1018
1018
1017
1017
1016
1016
1016
1015
1016
1016
1016
1015
1015
1015
1015
1014
1014
1014
1013
1013
1013
1013
1013

Ozone (du)

284
283
285
284
284
284
284
285
285
284
284
284
283
284
288
288
291
294
297
299
301
303
304
307

Friday 4

Third Quarter 39%

22:30

15:48

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 OK
03 OK
04 OK
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad

Sun - Rise: 06:20, Set: 19:40, Transit: 12:59. Moon - Rise: 22:30, Set: 15:48. Civil Dark: 20:15 - 05:45. Nautical Dark: 20:57 - 05:03. Astro Dark: 21:44 - 04:17

Total Clouds (% Sky Obscured)

99
98
98
74
89
99
99
100
100
65
70
75
75
75
56
36
22
40
55
72
71
70
69
72

Low Clouds (% Sky Obscured)

71
46
68
45
22
19
16
12
8
6
4
2
1
0
2
5
7
6
5
6
22
39
56
62

Medium Clouds (% Sky Obscured)

99
9
4
4
4
0
0
0
0
2
1
1
1
0
0
0
0
0
0
0
0
1
1
0

High Clouds (% Sky Obscured)

60
61
71
45
78
85
87
90
93
65
70
75
75
70
48
26
12
33
53
72
57
43
30
24

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 (%)

31
38
36
22
5
3
1
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

16
15
14
14
10
8
8
9
9
10
10
11
11
11
11
11
11
10
10
10
9
10
10
10

Relative Humidity (%)

84
75
67
65
49
42
43
49
53
62
67
73
75
78
80
82
83
83
84
83
83
78
71
66

Pressure (mb)

1013
1013
1013
1013
1013
1013
1013
1014
1015
1015
1016
1017
1017
1018
1018
1018
1019
1019
1020
1020
1021
1022
1022
1023

Ozone (du)

311
314
316
318
318
318
321
328
329
329
329
329
330
333
335
332
328
325
322
320
317
315
312
310

Saturday 5

Waning Crescent 28%

23:36

16:53

11 Bad
12 Bad
13 Bad
14 Bad
15 OK
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 OK
06 OK
07 OK
08 OK
09 OK
10 OK

Sun - Rise: 06:21, Set: 19:38, Transit: 12:59. Moon - Rise: 23:36, Set: 16:53. Civil Dark: 20:12 - 05:47. Nautical Dark: 20:55 - 05:05. Astro Dark: 21:41 - 04:20

Total Clouds (% Sky Obscured)

77
80
65
49
33
52
70
76
75
76
78
77
77
76
75
70
67
53
38
22
24
25
22
21

Low Clouds (% Sky Obscured)

70
76
54
31
9
7
6
4
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
1
3
12
13
14
18
17
17
16
10
9
7
6
6
4
6

High Clouds (% Sky Obscured)

19
15
22
21
15
22
28
41
27
26
26
30
33
45
42
50
57
44
27
11
11
11
11
11

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)

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

Chance of Frost

Temperature (°C)

17
18
19
20
20
20
20
20
19
18
17
15
15
15
14
14
13
13
12
12
12
14
15
17

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

58
52
46
43
41
39
42
45
49
53
58
62
65
67
69
69
70
70
69
69
68
62
54
49

Pressure (mb)

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

Ozone (du)

309
307
306
306
306
306
305
304
304
303
303
302
301
299
298
297
296
294
294
293
293
291
290
289

Sunday 6

Waning Crescent 18%

00:58

17:40

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

Sun - Rise: 06:23, Set: 19:36, Transit: 12:59. Moon - Rise: 00:58, Set: 17:40. Civil Dark: 20:10 - 05:49. Nautical Dark: 20:52 - 05:07. Astro Dark: 21:38 - 04:22

Total Clouds (% Sky Obscured)

21
20
26
32
37
43
44
49
72
77
72
67
72
76
75
69
63
60
58
67

Low Clouds (% Sky Obscured)

1
1
1
1
1
2
1
0
0
0
0
4
9
13
13
14
25
20
15
10

Medium Clouds (% Sky Obscured)

7
9
10
11
8
8
9
10
10
10
5
4
8
12
12
9
3
6
6
6

High Clouds (% Sky Obscured)

15
15
20
30
37
43
44
49
72
40
35
35
35
50
71
69
63
60
58
55

ISS Passover

Visibility (miles)

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

Precipitation Type

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
3
5
6
7
14
19
20
15
16
8
7
6
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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

15
16
16
21
21
20
20
21
21
19
19
19
20
20
19
16
16
16
16
15

Dew Point (°C)

7
7
7
7
7
7
8
8
9
9
9
10
11
11
12
12
11
11
11
11

Relative Humidity (%)

46
43
39
38
37
36
39
42
46
51
55
61
65
68
72
73
74
75
75
76

Pressure (mb)

1025
1025
1025
1024
1023
1023
1023
1022
1022
1022
1022
1023
1022
1022
1022
1022
1021
1021
1021
1021

Ozone (du)

290
291
292
292
292
292
292
292
292
292
292
292
291
290
289
289
289
289
289
290

Forecast for Welwyn Garden City, Hertfordshire, United Kingdom (51.80,-0.21)

Generated: 31/08/26 10:20:50. Forecast: 31/08/26 to 06/09/26. Timezone: UTC+1.00