Clear Outside v1.0 - International Weather Forecasts For Astronomers

Friday 19

New Moon 1%

08:12

15:34

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

Sun - Rise: 07:19, Set: 16:17, Transit: 11:48. Moon - Rise: 08:12, Set: 15:34. Civil Dark: 16:49 - 06:46. Nautical Dark: 17:25 - 06:10. Astro Dark: 18:00 - 05:36

Total Clouds (% Sky Obscured)

100
91
100
50
81
88
100
92
66
46
39
22
28
26
8
2
2
0
0
0
0
0
68
85

Low Clouds (% Sky Obscured)

100
91
21
50
58
78
29
24
35
40
34
22
28
26
8
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

87
90
92
5
36
36
100
83
45
1
1
0
0
0
0
0
0
0
0
0
0
0
4
85

High Clouds (% Sky Obscured)

1
18
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
36
58

ISS Passover

Visibility (miles)

1
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

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

Precipitation Probability (%)

95
95
59
4
14
42
26
14
5
5
10
11
9
5
1
0
0
0
0
0
0
0
0
0

Precipitation Amount (mm)

0.2
0.6
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)

18
18
8
7
8
11
17
16
15
15
15
16
16
18
16
15
15
15
12
8
6
7
7
7

Chance of Frost

Temperature (°C)

12
9
6
6
4
3
2
-1
-2
-2
-2
-3
-3
-4
-4
-5
-6
-6
-6
-6
-5
-3
-2
-1

Feels Like (°C)

8
4
3
2
2
-2
-5
-7
-8
-8
-8
-9
-9
-10
-10
-10
-12
-12
-11
-9
-7
-6
-5
-4

Dew Point (°C)

11
6
4
4
3
1
-2
-4
-5
-6
-7
-7
-8
-10
-10
-11
-12
-12
-12
-12
-12
-12
-11
-11

Relative Humidity (%)

93
85
86
86
88
83
74
75
75
71
71
72
69
61
62
63
63
60
60
60
54
50
50
49

Pressure (mb)

987
989
990
990
992
993
995
997
998
1000
1001
1002
1004
1006
1008
1011
1013
1015
1016
1017
1018
1019
1019
1019

Ozone (du)

305
311
319
322
325
338
346
346
350
351
352
350
352
351
342
345
342
336
332
326
320
320
317
313

Saturday 20

Waxing Crescent 0%

08:56

16:30

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 OK
11 OK
12 Bad

Sun - Rise: 07:19, Set: 16:17, Transit: 11:49. Moon - Rise: 08:56, Set: 16:30. Civil Dark: 16:50 - 06:47. Nautical Dark: 17:26 - 06:11. Astro Dark: 18:01 - 05:36

Total Clouds (% Sky Obscured)

100
100
81
81
88
98
100
100
100
100
96
99
100
81
100
100
57
57
56
100
45
35
36
58

Low Clouds (% Sky Obscured)

0
0
45
4
50
3
3
5
5
0
4
9
4
3
21
19
18
11
4
38
11
20
32
45

Medium Clouds (% Sky Obscured)

97
100
77
74
82
97
100
79
77
32
71
83
99
43
88
45
45
36
41
33
0
0
0
0

High Clouds (% Sky Obscured)

100
71
64
60
66
68
100
100
100
100
89
74
93
81
100
100
57
57
56
100
45
0
0
0

ISS Passover

Visibility (miles)

9
9
9
8
9
9
9
9
9
9
4
9
9
9
9
9
9
9
9
9
9
9
9
8

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
5
3
10
2
0
0
0
0
7
0
0
0
0
9
15
3
1
4
2
2
6
15

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
4
3
5
5
6
6
8
9
9
10
10
9
8
7
7
7
8
9
9
11
14
13
13

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-10
-10
-9
-7
-6
-7
-7
-6
-6
-6
-7
-8
-7
-5
-4
-4
-3
-4
-4
-4
-3
-6
-5
-5

Relative Humidity (%)

49
51
55
63
70
67
69
71
74
74
66
61
62
67
71
71
74
71
70
73
69
55
62
63

Pressure (mb)

1019
1019
1019
1018
1018
1018
1017
1015
1014
1013
1012
1011
1011
1011
1010
1010
1010
1010
1010
1010
1011
1012
1012
1012

Ozone (du)

307
306
304
302
301
298
297
299
300
300
301
299
303
309
307
306
305
304
299
296
304
308
315
318

Sunday 21

Waxing Crescent 3%

09:31

17:33

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

Sun - Rise: 07:20, Set: 16:18, Transit: 11:49. Moon - Rise: 09:31, Set: 17:33. Civil Dark: 16:50 - 06:47. Nautical Dark: 17:26 - 06:11. Astro Dark: 18:01 - 05:36

Total Clouds (% Sky Obscured)

62
49
30
35
19
24
23
24
20
43
51
48
19
15
32
7
4
4
3
1
0
1
4
3

Low Clouds (% Sky Obscured)

52
36
27
32
14
17
16
15
13
41
47
38
16
13
30
6
3
3
2
1
0
0
3
1

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
2

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
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
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
1
2
2
2
2
1
3
6
5
7
5
2
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)

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

Chance of Frost

Temperature (°C)

1
1
-0
-1
-2
-3
-4
-3
-4
-4
-4
-5
-6
-7
-8
-9
-9
-9
-9
-9
-8
-7
-6
-5

Feels Like (°C)

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

Dew Point (°C)

-5
-7
-8
-8
-7
-9
-10
-9
-9
-10
-9
-10
-12
-13
-14
-15
-16
-16
-16
-16
-16
-16
-16
-15

Relative Humidity (%)

64
57
58
62
66
64
63
64
64
65
66
66
60
62
61
61
59
59
59
58
54
49
46
47

Pressure (mb)

1012
1013
1014
1015
1016
1018
1018
1019
1020
1020
1020
1021
1022
1024
1025
1026
1027
1028
1029
1030
1031
1031
1031
1030

Ozone (du)

321
325
328
331
332
330
326
331
330
330
330
330
333
335
345
354
359
363
362
357
357
364
361
352

Monday 22

Waxing Crescent 7%

10:00

18:40

13 Good
14 Good
15 Good
16 Good
17 OK
18 OK
19 OK
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
11 Bad
12 Bad

Sun - Rise: 07:20, Set: 16:18, Transit: 11:50. Moon - Rise: 10:00, Set: 18:40. Civil Dark: 16:51 - 06:48. Nautical Dark: 17:27 - 06:12. Astro Dark: 18:02 - 05:37

Total Clouds (% Sky Obscured)

5
7
10
13
17
23
41
60
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

4
5
8
8
8
6
4
3
6
5
7
8
17
78
75
76
78
80
84
90
95
94
92
89

Medium Clouds (% Sky Obscured)

1
0
0
0
0
0
13
33
56
63
100
100
100
100
100
100
100
100
100
100
100
100
100
100

High Clouds (% Sky Obscured)

0
0
0
0
0
0
32
60
100
100
100
100
100
100
100
100
100
100
100
100
100
67
33
0

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
8
4
2
0
0
2
1
0
0
0
0

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
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow

Precipitation Probability (%)

0
0
0
1
2
3
3
3
0
1
1
0
2
21
32
51
75
74
59
70
91
92
95
82

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.2
0.5
0.3
0.2
0.3
0.5
0.5
0.6
0.4

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-14
-14
-13
-12
-12
-11
-11
-11
-10
-9
-9
-9
-8
-8
-7
-7
-6
-6
-5
-6
-5
-4
-4
-3

Relative Humidity (%)

47
47
50
55
60
62
63
66
72
72
74
74
76
75
79
84
90
90
90
87
89
91
87
92

Pressure (mb)

1030
1030
1030
1030
1030
1030
1030
1030
1029
1029
1029
1028
1028
1028
1028
1027
1026
1026
1025
1024
1023
1022
1020
1018

Ozone (du)

346
346
351
353
352
354
352
353
349
349
348
343
342
340
337
334
332
330
325
320
317
317
315
318

Tuesday 23

Waxing Crescent 13%

10:24

19:49

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
11 Bad
12 Bad

Sun - Rise: 07:20, Set: 16:19, Transit: 11:50. Moon - Rise: 10:24, Set: 19:49. Civil Dark: 16:51 - 06:48. Nautical Dark: 17:27 - 06:12. Astro Dark: 18:02 - 05:37

Total Clouds (% Sky Obscured)

97
95
92
91
89
87
86
86
85
70
69
69
89
91
91
93
94
94
90
83
80
80
79
78

Low Clouds (% Sky Obscured)

87
83
79
78
77
76
79
81
83
70
69
69
87
91
91
93
94
94
90
83
80
76
66
55

Medium Clouds (% Sky Obscured)

88
75
59
46
29
20
13
6
0
0
0
0
62
59
42
24
7
7
5
2
0
2
5
7

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
2
4
4
3
3
20
28
38

ISS Passover

Visibility (miles)

0
2
0
0
1
7
7
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

Snow
Snow
None
None
None
None
None
None
None
None
None
None
Snow
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

65
56
41
33
26
19
18
25
10
13
9
7
39
35
30
27
23
19
17
14
10
12
13
12

Precipitation Amount (mm)

0.2
0.2
0
0
0
0
0
0
0
0
0
0
0.1
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-6
-6
-4
-4
-5
-4
-4
-4
-4
-5
-4
-5
-6
-6
-5
-5
-6
-5
-5
-7
-6
-6
-5
-4

Dew Point (°C)

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

Relative Humidity (%)

91
86
94
98
96
89
89
91
88
88
77
75
74
74
75
77
77
77
77
72
71
70
69
68

Pressure (mb)

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

Ozone (du)

318
318
322
329
332
333
337
336
335
335
334
335
334
330
326
321
321
321
320
320
320
320
324
327

Wednesday 24

Waxing Crescent 21%

10:45

20:58

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

Sun - Rise: 07:21, Set: 16:20, Transit: 11:51. Moon - Rise: 10:45, Set: 20:58. Civil Dark: 16:52 - 06:48. Nautical Dark: 17:28 - 06:12. Astro Dark: 18:03 - 05:38

Total Clouds (% Sky Obscured)

62
45
25
23
22
19
18
16
15
19
21
22
36
59
78
79
85
90
68
56
46
40
40
35

Low Clouds (% Sky Obscured)

54
45
25
23
22
19
18
16
15
19
21
20
15
10
7
6
5
3
2
2
2
2
1
0

Medium Clouds (% Sky Obscured)

6
4
3
2
2
2
1
1
1
1
1
0
22
43
64
76
85
90
68
56
36
26
14
4

High Clouds (% Sky Obscured)

14
6
1
1
1
0
0
0
0
2
2
4
13
16
19
21
23
25
19
8
2
2
6
9

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 (%)

14
10
4
9
10
9
9
8
6
7
6
0
1
3
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
8
8
7
7
6
6
6
6
6
5
5
4
4
3
3
2
2
2
2
3
2
2

Chance of Frost

Temperature (°C)

2
1
0
-1
-2
-3
-3
-4
-4
-5
-5
-6
-6
-7
-7
-7
-7
-8
-8
-7
-5
-4
-3
-2

Feels Like (°C)

-4
-3
-3
-3
-3
-3
-2
-6
-6
-6
-6
-6
-7
-8
-9
-9
-10
-10
-10
-10
-10
-10
-9
-8

Dew Point (°C)

-4
-4
-4
-5
-5
-5
-5
-5
-6
-6
-6
-7
-8
-8
-8
-9
-9
-9
-9
-10
-10
-10
-9
-9

Relative Humidity (%)

66
69
73
74
79
84
91
91
90
90
92
90
90
90
89
87
87
88
88
80
72
66
63
57

Pressure (mb)

1019
1020
1021
1021
1022
1023
1024
1025
1025
1026
1026
1026
1027
1027
1027
1027
1027
1028
1028
1028
1029
1029
1028
1027

Ozone (du)

331
332
334
335
331
327
323
320
318
315
314
313
312
313
314
315
315
316
316
318
320
322
319
316

Thursday 25

Waxing Crescent 30%

11:05

22:07

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

Sun - Rise: 07:21, Set: 16:20, Transit: 11:51. Moon - Rise: 11:05, Set: 22:07. Civil Dark: 16:53 - 06:49. Nautical Dark: 17:29 - 06:13. Astro Dark: 18:03 - 05:38

Total Clouds (% Sky Obscured)

52
71
87
93
94
90
91
92
89
92
97
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

0
0
0
1
3
4
17
31
47
61
75
90
91
92
93
95
98
100

Medium Clouds (% Sky Obscured)

13
22
33
57
78
90
91
92
89
92
97
100
100
100
100
100
100
100

High Clouds (% Sky Obscured)

12
18
22
23
15
10
9
17
26
54
76
92
95
98
100
91
83
74

ISS Passover

Visibility (miles)

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

Fog (%)

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
Frozen rai
Frozen rai
Frozen rai
Light Rain
Light Rain
Light Rain
Light Rain

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
30
51
72
95
95
95
95
95
95

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0.4
0.8
1.1
1.3
1.4
1.3
1.2

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

54
64
74
86
87
87
89
89
89
87
89
92
94
96
96
98
98
100

Pressure (mb)

1026
1026
1026
1026
1026
1026
1026
1025
1024
1024
1022
1020
1019
1017
1016
1014
1013
1012

Ozone (du)

313
309
306
303
301
299
297
295
293
291
289
288
287
288
289
290
297
304

Forecast for Chester, Windsor, United States of America (43.26,-72.60)

Generated: 19/12/25 13:04:36. Forecast: 19/12/25 to 25/12/25. Timezone: UTC-5.00