Clear Outside v1.0 - International Weather Forecasts For Astronomers

Friday 19

Waning Crescent 1%

08:16

14:50

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

Sun - Rise: 08:09, Set: 15:59, Transit: 12:04. Moon - Rise: 08:16, Set: 14:50. Civil Dark: 16:39 - 07:29. Nautical Dark: 17:22 - 06:46. Astro Dark: 18:03 - 06:05

Total Clouds (% Sky Obscured)

25
3
24
13
1
14
1
24
1
14
3
1
0
11
21
20
22
46
39
24
30
37
32
36

Low Clouds (% Sky Obscured)

37
33
20
0
1
0
12
8
19
16
20
28
37
11
21
20
22
46
39
24
30
37
32
36

Medium Clouds (% Sky Obscured)

77
73
75
50
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

55
88
36
43
100
79
50
1
0
0
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

Fog (%)

-
-
-
-
-
-
-
-
-
-
-
-
-
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
8
8
9
9
7
8
10
10
10
11
12
13
13
13
10
9
8
7
6
5
5
5
5

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

91
92
90
89
85
84
88
88
86
83
83
81
81
87
87
88
91
94
93
93
94
94
94
94

Pressure (mb)

1007
1008
1009
1010
1010
1011
1012
1013
1013
1015
1015
1016
1016
1016
1016
1017
1017
1017
1017
1018
1018
1018
1017
1017

Ozone (du)

355
354
357
361
358
361
361
360
374
370
370
366
361
356
340
310
302
294
288
286
280
279
281
286

Saturday 20

New Moon 0%

09:10

15:45

00 Bad
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

Sun - Rise: 08:10, Set: 15:59, Transit: 12:05. Moon - Rise: 09:10, Set: 15:45. Civil Dark: 16:39 - 07:30. Nautical Dark: 17:23 - 06:46. Astro Dark: 18:04 - 06:06

Total Clouds (% Sky Obscured)

47
58
57
62
58
60
70
65
65
66
57
56
51
45
52
80
88
78
88
94
89
99
100
100

Low Clouds (% Sky Obscured)

47
58
57
62
58
60
70
65
65
66
57
56
51
45
52
53
51
55
56
63
71
71
97
78

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
3
64
79
65
51
60
54
99

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
3
30
83
43
33
80
49
40
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
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
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

0
1
2
2
2
7
8
4
2
1
0
3
3
3
0
2
3
7
7
16
13
32
29
27

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

4
4
4
4
4
4
4
4
3
3
4
5
5
5
5
4
2
2
0
1
2
1
2
2

Dew Point (°C)

4
4
5
5
5
5
5
5
5
5
5
6
6
5
5
5
5
5
5
5
5
5
5
5

Relative Humidity (%)

93
93
94
94
96
94
94
96
96
94
93
90
87
82
82
87
91
94
93
93
94
93
94
91

Pressure (mb)

1017
1016
1016
1015
1014
1013
1013
1012
1012
1012
1011
1010
1009
1008
1007
1006
1006
1005
1005
1005
1004
1004
1004
1003

Ozone (du)

289
294
296
302
303
301
297
294
289
283
282
281
283
288
289
293
299
302
301
304
307
306
304
310

Sunday 21

Waxing Crescent 2%

09:50

16:52

00 Bad
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

Sun - Rise: 08:10, Set: 16:00, Transit: 12:05. Moon - Rise: 09:50, Set: 16:52. Civil Dark: 16:40 - 07:30. Nautical Dark: 17:23 - 06:47. Astro Dark: 18:04 - 06:06

Total Clouds (% Sky Obscured)

100
96
100
100
100
100
100
99
100
100
99
99
99
98
90
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

85
79
78
84
73
71
68
69
71
80
64
79
74
84
63
96
90
68
74
78
82
88
60
65

Medium Clouds (% Sky Obscured)

100
90
100
100
100
100
100
89
89
100
98
98
91
94
86
100
100
100
100
100
100
100
100
100

High Clouds (% Sky Obscured)

72
55
21
100
100
20
70
91
97
55
34
62
84
69
54
100
100
100
100
100
100
100
100
100

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
7
9
6
9
6
4
7
9
9
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
19
49
100
100
100
13
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

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

Precipitation Probability (%)

32
31
30
28
8
2
2
37
47
52
57
67
72
63
46
35
25
9
8
38
20
30
22
35

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

7
7
7
7
7
7
7
7
7
7
8
8
8
8
9
8
8
8
8
7
7
7
7
7

Feels Like (°C)

3
3
4
5
4
4
5
5
4
4
4
5
4
5
5
4
5
5
5
5
5
5
5
5

Dew Point (°C)

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

Relative Humidity (%)

91
93
93
96
96
96
96
94
96
96
93
94
96
95
95
91
93
95
94
96
96
98
98
96

Pressure (mb)

1003
1004
1004
1004
1004
1004
1004
1004
1004
1004
1004
1004
1003
1003
1003
1003
1003
1003
1003
1003
1003
1004
1004
1003

Ozone (du)

316
317
313
313
315
316
317
317
317
321
333
347
359
371
380
385
387
389
388
389
394
397
397
398

Monday 22

Waxing Crescent 6%

10:20

18:06

00 Bad
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

Sun - Rise: 08:11, Set: 16:00, Transit: 12:06. Moon - Rise: 10:20, Set: 18:06. Civil Dark: 16:40 - 07:31. Nautical Dark: 17:24 - 06:47. Astro Dark: 18:05 - 06:07

Total Clouds (% Sky Obscured)

100
100
100
100
99
100
100
100
100
93
88
80
86
88
95
95
95
95
97
99
100
100
100
100

Low Clouds (% Sky Obscured)

88
99
100
100
83
93
98
96
93
87
80
71
60
64
65
69
69
70
80
86
85
80
75
70

Medium Clouds (% Sky Obscured)

100
100
76
40
23
27
31
29
24
13
14
1
52
26
75
87
89
88
84
81
76
68
68
28

High Clouds (% Sky Obscured)

97
100
23
15
78
53
64
76
87
70
50
36
32
28
27
30
33
40
36
33
34
56
73
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 (%)

45
38
37
28
14
17
19
14
10
9
5
3
4
3
1
0
0
1
2
1
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
4
5
5
4
4
5
5
6
7
7
6
7
8
8
8
8
8
8
8
9
9
9
9

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

96
94
94
94
96
94
94
93
93
94
91
87
84
82
84
90
91
93
91
90
90
90
91
89

Pressure (mb)

1003
1003
1003
1003
1003
1003
1004
1004
1005
1005
1005
1005
1005
1006
1006
1006
1006
1007
1007
1008
1008
1008
1009
1009

Ozone (du)

397
397
396
398
397
396
396
397
398
399
403
402
404
407
410
413
415
414
412
412
414
414
408
400

Tuesday 23

Waxing Crescent 12%

10:42

19:24

00 Bad
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

Sun - Rise: 08:11, Set: 16:01, Transit: 12:06. Moon - Rise: 10:42, Set: 19:24. Civil Dark: 16:41 - 07:31. Nautical Dark: 17:24 - 06:48. Astro Dark: 18:05 - 06:07

Total Clouds (% Sky Obscured)

100
100
100
100
99
99
98
96
91
87
88
82
83
84
86
92
84
76
79
81
83
88
94
100

Low Clouds (% Sky Obscured)

68
64
64
71
74
82
86
86
85
80
84
82
83
83
86
92
83
76
77
80
82
88
94
100

Medium Clouds (% Sky Obscured)

24
20
30
50
52
46
26
7
0
4
4
6
5
3
0
0
0
2
2
2
3
28
26
57

High Clouds (% Sky Obscured)

100
100
100
75
47
13
12
13
6
5
5
1
1
0
0
0
0
2
2
2
1
2
1
18

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
2
2
1
5
6
6
6
5
2
11
14
16
13
11
9
7
5
1
2
2
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)

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

Chance of Frost

Temperature (°C)

5
4
4
4
4
4
4
4
4
4
4
5
6
6
5
5
5
5
5
5
5
5
4
5

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

89
91
91
91
91
93
91
93
94
94
91
88
85
85
88
94
88
88
89
94
96
93
89
83

Pressure (mb)

1009
1009
1009
1010
1010
1010
1010
1011
1011
1012
1012
1012
1012
1013
1013
1013
1014
1014
1015
1016
1016
1017
1017
1017

Ozone (du)

393
386
378
372
369
370
371
371
372
370
370
371
372
373
373
375
376
378
379
380
379
378
379
382

Wednesday 24

Waxing Crescent 19%

10:58

20:42

00 Bad
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

Sun - Rise: 08:12, Set: 16:02, Transit: 12:07. Moon - Rise: 10:58, Set: 20:42. Civil Dark: 16:42 - 07:31. Nautical Dark: 17:25 - 06:48. Astro Dark: 18:06 - 06:07

Total Clouds (% Sky Obscured)

92
85
77
74
71
68
74
78
84
84
84
82
83
83
84
85
88
91
93
95
97
93
87
82

Low Clouds (% Sky Obscured)

88
76
66
65
66
68
72
77
82
78
74
71
72
74
76
82
86
91
90
89
88
88
87
82

Medium Clouds (% Sky Obscured)

59
64
66
52
38
29
24
16
6
5
4
6
7
6
6
3
2
0
4
8
16
14
14
11

High Clouds (% Sky Obscured)

19
15
14
24
31
33
41
44
43
16
7
3
2
1
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 (%)

4
4
3
7
10
12
10
7
0
6
9
9
12
13
9
8
5
2
28
40
47
44
39
32

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

Chance of Frost

Temperature (°C)

5
5
5
4
4
4
3
3
3
3
4
4
4
4
4
4
4
3
3
3
3
3
3
3

Feels Like (°C)

0
0
0
0
-0
-1
-1
-2
-3
-3
-2
-1
-1
-2
-2
-2
-2
-2
-3
-4
-4
-5
-5
-4

Dew Point (°C)

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

Relative Humidity (%)

88
88
86
86
88
88
89
89
89
89
86
85
82
79
75
73
71
71
68
67
67
67
65
67

Pressure (mb)

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

Ozone (du)

382
379
376
373
373
374
374
372
371
369
368
368
367
367
367
367
365
363
361
358
356
353
351
349

Thursday 25

Waxing Crescent 28%

11:12

22:00

00 Bad
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

Sun - Rise: 08:12, Set: 16:02, Transit: 12:07. Moon - Rise: 11:12, Set: 22:00. Civil Dark: 16:42 - 07:32. Nautical Dark: 17:26 - 06:48. Astro Dark: 18:06 - 06:08

Total Clouds (% Sky Obscured)

81
89
90
82
81
76
82
84
91
95
95
95
95
95
95
95
96
96
94
92
82
74
71
67

Low Clouds (% Sky Obscured)

81
88
87
82
81
76
82
84
91
95
94
93
94
94
95
95
95
91
85
79
73
71
71
67

Medium Clouds (% Sky Obscured)

13
17
26
24
25
27
21
18
15
15
20
25
25
30
30
25
25
20
14
9
12
17
23
35

High Clouds (% Sky Obscured)

0
0
0
0
0
0
4
7
10
7
3
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 (%)

27
21
14
16
17
17
20
22
23
29
33
37
34
31
28
27
25
20
22
22
22
24
23
19

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

67
68
69
70
74
79
83
83
83
85
82
80
77
77
79
80
82
83
86
86
88
88
89
91

Pressure (mb)

1025
1025
1025
1025
1025
1025
1025
1025
1025
1026
1026
1025
1025
1025
1025
1025
1025
1025
1025
1026
1026
1026
1026
1026

Ozone (du)

347
345
342
340
337
334
331
331
330
329
328
327
327
327
327
327
328
328
329
329
330
330
329
328

Forecast for Swindon, Swindon, United Kingdom (51.56,-1.78)

Generated: 19/12/25 13:46:23. Forecast: 19/12/25 to 25/12/25. Timezone: UTC+0.00