Clear Outside v1.0 - International Weather Forecasts For Astronomers

Sunday 21

Waxing Crescent 3%

08:56

17:33

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

Sun - Rise: 07:20, Set: 16:18, Transit: 11:49. Moon - Rise: 08:56, 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)

46
47
36
17
21
51
30
26
16
22
25
46
45
61
41
19
8
6
1
2
1
3
3
2

Low Clouds (% Sky Obscured)

32
47
0
0
21
48
30
26
16
22
25
46
45
61
38
19
8
6
0
0
0
0
0
0

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
2
1

High Clouds (% Sky Obscured)

2
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 (%)

0
0
0
0
0
1
3
2
1
1
2
3
1
1
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
14
14
14
13
13
13
14
14
15
15
14
13
12
12
12
11
10
10
9
8
9
9
9

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-6
-7
-9
-10
-8
-9
-8
-8
-8
-9
-10
-11
-11
-11
-12
-13
-14
-14
-15
-15
-16
-15
-16
-16

Relative Humidity (%)

68
67
55
51
54
53
56
61
61
62
60
60
61
61
62
62
60
60
60
60
60
60
59
56

Pressure (mb)

1011
1012
1013
1014
1015
1016
1017
1018
1018
1020
1021
1021
1022
1023
1024
1025
1026
1027
1027
1028
1029
1029
1030
1030

Ozone (du)

299
303
308
313
317
318
322
320
314
314
318
317
318
318
320
318
323
335
342
351
351
352
357
363

Monday 22

Waxing Crescent 7%

09:31

18:40

09 Good
10 Good
11 Good
12 OK
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

Sun - Rise: 07:20, Set: 16:18, Transit: 11:49. Moon - Rise: 09:31, 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)

3
2
3
34
65
57
56
57
54
61
52
49
83
94
100
100
100
100
74
100
100
100
100
100

Low Clouds (% Sky Obscured)

0
0
2
2
5
18
12
16
21
16
6
23
6
13
11
10
30
44
53
50
64
22
42
19

Medium Clouds (% Sky Obscured)

1
1
0
34
65
57
56
57
54
30
3
13
55
72
90
100
98
61
40
45
89
100
92
100

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
3
35
45
30
69
86
63
80
100
100
74
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
9
9
7
6
8
7
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
3
2
1
1
2
0
0
0
0
0
1
0
1
1
3
4
16

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
10
11
11
10
9
7
4
1
2
3
3
2
3
2
2
2
1
1
1
1
1
1
1

Chance of Frost

Temperature (°C)

-8
-6
-5
-4
-3
-3
-3
-3
-4
-4
-5
-5
-5
-5
-5
-5
-6
-5
-5
-5
-5
-5
-5
-5

Feels Like (°C)

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

Dew Point (°C)

-16
-15
-14
-13
-12
-11
-10
-9
-8
-8
-8
-7
-7
-7
-7
-7
-7
-6
-6
-6
-6
-5
-6
-6

Relative Humidity (%)

53
49
48
48
50
52
57
65
75
78
81
82
84
87
89
89
90
90
90
92
94
94
94
92

Pressure (mb)

1030
1030
1030
1029
1028
1028
1028
1028
1028
1028
1028
1027
1027
1026
1026
1025
1025
1025
1025
1025
1025
1025
1024
1024

Ozone (du)

361
360
353
352
346
344
344
344
346
350
352
351
354
358
358
361
355
353
348
343
339
336
335
333

Tuesday 23

Waxing Crescent 13%

10:00

19:49

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
05 Bad
06 Bad
07 Bad
08 OK

Sun - Rise: 07:20, Set: 16:19, Transit: 11:50. Moon - Rise: 10:00, 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)

100
100
100
96
96
95
94
94
96
100
100
100
100
100
100
100
96
98
100
100
89
86
61
27

Low Clouds (% Sky Obscured)

27
30
29
44
43
41
70
89
95
100
100
100
100
100
100
100
94
96
94
93
81
79
61
27

Medium Clouds (% Sky Obscured)

100
97
100
90
88
78
53
43
43
44
50
53
78
88
48
52
51
55
70
75
65
30
19
9

High Clouds (% Sky Obscured)

74
20
25
19
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
8
1
0
0
0
0
0
0
0
0
0
1
0
7
9

Fog (%)

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

Precipitation Type

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

Precipitation Probability (%)

37
53
39
34
30
19
11
3
5
26
48
61
60
57
55
56
53
56
59
58
54
44
20
18

Precipitation Amount (mm)

0.1
0.3
0.2
0.1
0.1
0
0
0
0
0
0.2
0.3
0.3
0.2
0.2
0.2
0.2
0.2
0.2
0.1
0
0.1
0
0

Wind Speed/Direction (mph)

1
1
1
1
2
3
2
2
2
2
3
3
2
2
2
1
2
2
2
3
2
2
4
6

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-5
-6
-6
-6
-5
-5
-5
-3
-3
-4
-4
-3
-3
-3
-3
-3
-4
-4
-4
-3
-3
-2
-3
-4

Relative Humidity (%)

84
79
75
72
74
72
74
84
87
86
87
94
94
94
94
94
94
94
94
96
96
98
89
80

Pressure (mb)

1024
1024
1023
1022
1021
1021
1021
1021
1021
1021
1021
1021
1021
1020
1020
1020
1019
1019
1018
1018
1017
1018
1018
1019

Ozone (du)

332
332
329
323
324
320
324
326
328
328
327
328
333
335
334
332
330
330
331
335
337
339
335
333

Wednesday 24

Waxing Crescent 21%

10:24

20:58

09 OK
10 Bad
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
07 Bad
08 Bad

Sun - Rise: 07:21, Set: 16:20, Transit: 11:50. Moon - Rise: 10:24, 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)

35
53
26
26
30
31
31
32
36
42
56
87
96
97
99
100
100
100
100
100
98
100
92
100

Low Clouds (% Sky Obscured)

35
52
20
26
29
21
22
20
16
14
12
11
13
14
14
85
82
79
67
76
18
26
22
73

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
11
27
51
73
97
100
100
100
100
100
98
93
78
66

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
5
5
37
68
100
100
100
95
88
76
64
76
88

ISS Passover

Visibility (miles)

9
7
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
7
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 (%)

19
23
15
9
8
7
3
4
2
0
0
0
0
0
0
0
0
2
3
3
1
0
1
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
7
9
10
9
9
8
5
4
3
2
2
2
2
1
1
2
2
2
3
3
4
4

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

77
74
71
66
66
66
69
74
83
89
91
91
89
85
85
84
79
79
79
86
82
92
92
92

Pressure (mb)

1020
1021
1021
1021
1021
1022
1023
1024
1025
1026
1027
1027
1027
1027
1027
1026
1026
1025
1024
1024
1023
1022
1021
1021

Ozone (du)

329
329
329
330
331
328
327
322
321
319
314
312
312
312
313
316
317
317
316
318
318
318
319
320

Thursday 25

Waxing Crescent 30%

10:45

22:07

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
05 Bad
06 Bad
07 Bad
08 Bad

Sun - Rise: 07:21, Set: 16:20, Transit: 11:51. Moon - Rise: 10:45, 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)

100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
90
79
70
80
90
100
100
100

Low Clouds (% Sky Obscured)

62
37
79
100
100
100
100
92
84
76
83
91
99
99
100
100
15
5
0
33
67
100
100
100

Medium Clouds (% Sky Obscured)

49
38
32
25
26
26
27
27
23
53
71
85
100
99
100
90
86
76
69
80
90
100
100
100

High Clouds (% Sky Obscured)

100
75
50
24
50
74
100
100
100
90
100
100
100
100
100
100
90
79
70
80
90
100
100
100

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
8
8
5
3
0
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
None
None
None
None
None
None
None
Frozen rai
Frozen rai

Precipitation Probability (%)

0
1
1
0
1
3
5
1
0
0
0
0
0
10
12
15
3
6
5
18
22
27
76
95

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
0.4
0.7

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

81
77
70
66
71
83
87
89
92
94
94
96
96
94
96
96
98
98
100
98
100
100
98
100

Pressure (mb)

1021
1020
1019
1017
1016
1016
1016
1015
1015
1015
1015
1015
1014
1014
1013
1012
1011
1014
1013
1012
1011
1010
1009
1007

Ozone (du)

320
319
322
320
320
316
314
312
311
309
307
304
302
301
300
300
299
296
294
291
289
287
285
283

Friday 26

Waxing Crescent 41%

11:05

23:17

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 Good
03 Good
04 Good
05 Good
06 Good
07 Good
08 OK

Sun - Rise: 07:21, Set: 16:21, Transit: 11:51. Moon - Rise: 11:05, Set: 23:17. Civil Dark: 16:53 - 06:49. Nautical Dark: 17:29 - 06:13. Astro Dark: 18:04 - 05:38

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
82
62
40
35
30
25
25
25
20
15
3
3
6
6
7
16
19

Low Clouds (% Sky Obscured)

100
100
100
100
100
100
100
82
62
40
35
30
25
25
25
20
15
3
3
6
6
7
16
19

Medium Clouds (% Sky Obscured)

100
100
100
100
89
78
67
45
22
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

100
100
100
100
100
100
100
70
42
13
6
5
0
0
0
0
0
0
0
0
0
0
7
16

ISS Passover

Visibility (miles)

0
0
0
0
0
3
6
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

Light Rain
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

95
95
95
95
95
95
95
95
95
88
91
75
59
47
28
7
6
2
0
0
0
0
0
0

Precipitation Amount (mm)

0.9
1.8
2.3
2.6
2.3
1.8
1.5
1.3
0.6
0.5
0.8
0.4
0.3
0.2
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

-1
-2
-1
-1
-1
-2
-2
-3
-4
-5
-6
-7
-7
-8
-8
-9
-9
-10
-11
-11
-12
-12
-13
-12

Feels Like (°C)

-4
-5
-5
-5
-5
-3
-3
-4
-4
-5
-6
-10
-10
-10
-10
-10
-10
-14
-14
-15
-15
-16
-16
-15

Dew Point (°C)

-1
-2
-2
-1
-1
-3
-5
-6
-8
-9
-11
-12
-13
-15
-15
-15
-15
-16
-17
-18
-19
-19
-20
-20

Relative Humidity (%)

100
98
98
98
98
89
81
75
73
72
70
66
63
59
59
59
60
59
57
56
56
55
55
50

Pressure (mb)

1006
1005
1003
1002
1000
1001
1002
1002
1004
1006
1008
1010
1011
1013
1015
1016
1017
1018
1019
1020
1022
1023
1024
1025

Ozone (du)

282
280
282
284
286
291
295
299
309
320
330
338
346
355
360
365
370
371
373
375
378
382
386
383

Saturday 27

First Quarter 52%

11:25

00:29

09 OK
10 OK
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
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad

Sun - Rise: 07:22, Set: 16:22, Transit: 11:52. Moon - Rise: 11:25, Set: 00:29. Civil Dark: 16:54 - 06:49. Nautical Dark: 17:30 - 06:13. Astro Dark: 18:05 - 05:39

Total Clouds (% Sky Obscured)

22
35
43
54
68
83
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

21
15
5
3
3
1
2
24
47
68
60
51
40
58
76
95
96
98
100
100
100
99

Medium Clouds (% Sky Obscured)

0
0
5
6
28
49
69
79
89
100
100
99
99
98
96
95
97
98
100
100
100
100

High Clouds (% Sky Obscured)

22
35
43
54
68
83
100
72
43
13
7
4
0
18
35
73
100
100
100
100
100
100

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
7
5
3
5
7
9
6
3

Fog (%)

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
Snow
Snow

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
3
3
0
1
3
6
20
28
32
46
58
70

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-15
-13
-13
-13
-12
-10
-11
-11
-12
-12
-12
-13
-12
-12
-12
-12
-12
-11
-11
-11
-11
-11

Dew Point (°C)

-20
-20
-19
-19
-18
-18
-18
-17
-17
-16
-16
-15
-15
-14
-14
-14
-14
-13
-12
-12
-10
-8

Relative Humidity (%)

47
43
42
40
39
41
44
47
50
54
58
59
60
63
63
63
62
63
63
63
73
84

Pressure (mb)

1026
1027
1026
1026
1025
1025
1025
1025
1025
1025
1024
1024
1023
1023
1022
1021
1019
1018
1017
1016
1014
1012

Ozone (du)

380
378
376
374
372
370
368
366
365
363
362
361
359
358
358
357
357
361
365
369
364
360

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

Generated: 21/12/25 09:34:00. Forecast: 21/12/25 to 27/12/25. Timezone: UTC-5.00