Clear Outside v1.0 - International Weather Forecasts For Astronomers

Monday 22

Waxing Crescent 13%

10:00

19:49

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
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad

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)

77
67
76
75
88
100
100
100
100
100
100
100
100
100
100
100
98
97
97
97
100
100
99
95

Low Clouds (% Sky Obscured)

33
28
10
1
2
18
33
61
79
68
52
95
95
94
92
95
93
89
88
86
91
96
92
90

Medium Clouds (% Sky Obscured)

13
62
76
74
85
92
100
100
100
100
100
100
100
100
100
100
89
88
88
90
100
100
95
84

High Clouds (% Sky Obscured)

4
64
75
75
75
100
100
100
100
100
100
100
65
100
56
11
39
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
0
0
0
0
0
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
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
2
6
37
57
73
79
84
90
81
74
84
95
95
90
75

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0.3
0.4
0.5
0.5
0.7
0.6
0.5
0.6
0.8
0.8
0.6
0.4

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-10
-9
-7
-6
-6
-7
-7
-7
-6
-6
-6
-6
-5
-5
-3
-2
-2
-1
-1
-1
-1
-1
-1
-1

Relative Humidity (%)

82
85
89
90
90
92
92
92
92
90
90
87
84
82
89
91
92
96
96
96
98
98
96
98

Pressure (mb)

1027
1027
1026
1026
1026
1026
1026
1026
1025
1025
1025
1024
1024
1023
1022
1020
1018
1017
1016
1015
1015
1014
1014
1013

Ozone (du)

329
328
335
329
329
326
329
328
325
323
317
318
314
316
313
309
308
306
308
310
317
325
332
338

Tuesday 23

Waxing Crescent 21%

10:24

20:58

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
13 OK
14 OK
15 Good
16 Good
17 Good
18 Good
19 Good
20 OK

Sun - Rise: 07:20, 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 - 05:37

Total Clouds (% Sky Obscured)

95
100
100
98
100
95
92
75
80
71
60
48
52
48
49
47
40
37
13
6
6
7
5
17

Low Clouds (% Sky Obscured)

86
100
99
96
100
87
79
72
72
61
50
37
52
47
42
46
38
29
10
5
6
7
5
8

Medium Clouds (% Sky Obscured)

63
46
52
61
33
57
60
38
45
27
17
10
0
0
0
0
0
0
0
0
0
0
0
8

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)

0
0
0
0
0
0
3
3
1
5
7
7
9
9
9
9
9
9
9
9
9
9
9
8

Fog (%)

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

Precipitation Type

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

Precipitation Probability (%)

56
57
57
50
40
37
45
57
45
25
25
14
12
19
8
6
3
1
0
0
0
0
0
0

Precipitation Amount (mm)

0.2
0.2
0.2
0.2
0
0
0
0.2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

2
1
1
1
2
2
2
3
8
12
12
13
14
13
13
12
11
10
9
7
5
4
4
3

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

96
96
96
96
98
96
96
92
93
84
84
81
78
73
73
70
68
68
71
78
89
92
92
92

Pressure (mb)

1012
1011
1011
1010
1010
1010
1009
1008
1009
1010
1012
1013
1015
1017
1017
1018
1019
1020
1021
1023
1024
1025
1026
1026

Ozone (du)

342
344
344
344
342
343
345
349
353
351
353
354
352
353
351
344
342
336
330
329
329
330
332
331

Wednesday 24

Waxing Crescent 30%

10:45

20:58

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
13 Bad
14 Bad
15 Bad
16 OK
17 Bad
18 Bad
19 Bad
20 Bad

Sun - Rise: 07:21, Set: 16:20, Transit: 11:51. Moon - Rise: 10:45, Set: 20:58. Civil Dark: 16:53 - 06:48. Nautical Dark: 17:29 - 06:12. Astro Dark: 18:03 - 05:38

Total Clouds (% Sky Obscured)

40
59
75
96
100
100
99
97
100
92
100
90
86
84
81
76
100
100
100
44
48
70
41
71

Low Clouds (% Sky Obscured)

16
16
23
16
34
69
54
70
80
59
18
60
11
69
68
47
61
5
25
36
41
64
40
65

Medium Clouds (% Sky Obscured)

27
45
50
92
100
100
98
91
88
78
64
53
70
59
37
1
2
0
0
24
14
4
3
1

High Clouds (% Sky Obscured)

0
1
5
5
31
85
36
45
100
41
100
59
52
46
56
50
100
100
100
25
11
6
2
2

ISS Passover

Visibility (miles)

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

Fog (%)

0
0
2
1
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
16
8
1
0
0
0
0
0
0
2
3
7
10
13
4
4

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)

2
2
2
2
1
2
2
2
1
2
2
3
2
2
3
2
6
8
9
9
11
11
13
12

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-8
-8
-8
-8
-8
-9
-8
-8
-8
-8
-7
-7
-8
-8
-8
-7
-5
-4
-4
-4
-4
-4
-7
-8

Relative Humidity (%)

94
94
94
92
89
85
85
85
85
87
90
90
81
73
67
63
61
66
71
75
81
84
75
72

Pressure (mb)

1026
1025
1025
1025
1024
1024
1022
1021
1020
1019
1018
1017
1017
1016
1014
1013
1011
1011
1011
1012
1013
1014
1015
1016

Ozone (du)

332
329
329
326
324
322
320
319
324
334
355
364
370
374
376
377
373
371
370
367
363
361
360
356

Thursday 25

Waxing Crescent 41%

11:05

22:07

21 OK
22 OK
23 OK
00 OK
01 OK
02 OK
03 OK
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

Sun - Rise: 07:21, Set: 16:21, Transit: 11:51. Moon - Rise: 11:05, Set: 22:07. Civil Dark: 16:53 - 06:49. Nautical Dark: 17:29 - 06:13. Astro Dark: 18:04 - 05:38

Total Clouds (% Sky Obscured)

17
31
19
19
26
30
38
58
100
80
100
100
98
78
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

17
24
12
14
11
6
4
4
4
4
4
4
4
4
0
0
0
0
0
9
18
39
37
97

Medium Clouds (% Sky Obscured)

0
6
9
14
12
8
11
19
28
40
40
50
55
55
49
48
90
98
98
100
97
100
100
100

High Clouds (% Sky Obscured)

2
4
1
0
13
27
38
58
100
80
100
100
98
78
100
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
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
Snow

Precipitation Probability (%)

2
1
1
0
0
0
0
1
1
2
0
0
0
0
0
0
0
0
0
4
7
9
35
62

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
0.2

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

-5
-7
-8
-8
-9
-9
-9
-10
-10
-11
-11
-11
-11
-10
-10
-9
-9
-9
-9
-9
-9
-8
-8
-9

Feels Like (°C)

-12
-12
-13
-13
-13
-13
-13
-14
-14
-16
-14
-15
-15
-15
-13
-14
-14
-14
-13
-14
-13
-12
-12
-13

Dew Point (°C)

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

Relative Humidity (%)

69
67
68
68
67
68
69
68
69
69
70
66
62
58
53
50
49
49
51
57
63
63
61
61

Pressure (mb)

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

Ozone (du)

355
356
348
344
340
338
336
337
339
337
331
330
331
328
325
322
319
315
318
320
321
321
322
324

Friday 26

Waxing Crescent 52%

11:25

23:17

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
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad

Sun - Rise: 07:21, Set: 16:22, Transit: 11:52. Moon - Rise: 11:25, Set: 23:17. Civil Dark: 16:54 - 06:49. Nautical Dark: 17:30 - 06:13. Astro Dark: 18:05 - 05:38

Total Clouds (% Sky Obscured)

100
100
100
100
100
98
100
78
79
81
81
79
74
84
91
99
88
86
85
89
92
96
95
95

Low Clouds (% Sky Obscured)

100
100
100
100
91
87
100
78
79
81
81
79
74
84
82
79
74
78
81
85
88
92
90
88

Medium Clouds (% Sky Obscured)

100
100
100
100
100
98
99
78
72
72
65
60
60
59
53
53
21
13
12
36
66
85
86
88

High Clouds (% Sky Obscured)

100
100
100
100
100
96
95
63
28
0
0
0
0
2
21
57
62
64
65
61
57
73
87
94

ISS Passover

Visibility (miles)

9
9
9
6
9
9
9
9
9
8
8
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

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

Precipitation Probability (%)

85
95
95
95
92
86
91
90
83
81
79
70
62
58
51
52
21
14
6
6
4
0
3
4

Precipitation Amount (mm)

0.5
0.6
0.7
0.8
0.7
0.5
0.6
0.7
0.5
0.5
0.5
0.4
0.3
0.3
0.2
0.3
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

3
3
2
2
2
2
2
2
2
2
1
1
2
2
2
3
3
3
2
2
1
1
1
1

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-13
-13
-13
-13
-14
-14
-14
-14
-13
-13
-13
-13
-11
-10
-10
-11
-10
-8
-8
-8
-7
-8
-8
-11

Dew Point (°C)

-14
-14
-15
-14
-14
-14
-13
-13
-13
-13
-13
-13
-14
-14
-13
-13
-12
-10
-9
-8
-8
-8
-8
-9

Relative Humidity (%)

64
65
66
71
73
76
81
80
86
88
88
83
74
67
64
63
63
70
76
82
85
89
90
87

Pressure (mb)

1020
1020
1020
1020
1020
1020
1020
1019
1020
1020
1021
1021
1022
1022
1021
1020
1020
1018
1018
1018
1018
1018
1019
1019

Ozone (du)

323
325
329
334
335
336
340
344
345
345
347
346
341
340
342
341
339
339
339
339
337
336
334
335

Saturday 27

First Quarter 63%

11:46

00:29

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
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad

Sun - Rise: 07:22, Set: 16:22, Transit: 11:52. Moon - Rise: 11:46, Set: 00:29. Civil Dark: 16:55 - 06:49. Nautical Dark: 17:31 - 06:13. Astro Dark: 18:05 - 05:39

Total Clouds (% Sky Obscured)

94
96
98
99
99
99
98
99
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

87
91
95
98
96
94
92
94
97
100
97
95
93
96
98
100
98
97
97
97
96
96
91
87

Medium Clouds (% Sky Obscured)

94
94
93
92
98
99
98
99
100
100
100
100
100
69
38
7
4
2
0
12
23
35
57
78

High Clouds (% Sky Obscured)

94
75
55
55
30
25
30
45
60
60
36
54
50
42
47
25
55
70
75
56
37
18
15
8

ISS Passover

Visibility (miles)

7
5
4
2
0
0
0
0
0
0
0
0
0
0
0
1
1
2
3
4
3
2
1
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
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Ice pellet
Ice pellet
Ice pellet
Snow
Snow
Snow
None
None
None
Snow
Snow
Snow
Snow
Snow
Snow

Precipitation Probability (%)

3
28
41
51
61
65
68
92
95
95
95
95
94
79
60
28
31
36
42
82
95
95
95
95

Precipitation Amount (mm)

0
0
0.1
0.2
0.3
0.3
0.2
0.6
0.9
1.2
0.7
0.6
0.5
0.4
0.2
0
0
0
0.1
0.5
0.8
1.1
1.1
1

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

83
82
85
89
94
96
94
94
96
96
94
94
96
96
96
94
94
92
92
91
91
87
86
84

Pressure (mb)

1018
1018
1018
1017
1016
1015
1014
1014
1013
1012
1011
1010
1009
1008
1006
1004
1002
1001
1000
999
998
997
996
995

Ozone (du)

335
336
336
336
335
336
336
337
340
343
346
355
365
374
375
377
378
379
379
380
388
396
404
409

Sunday 28

Waxing Gibbous 74%

12:11

01:45

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
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 OK

Sun - Rise: 07:22, Set: 16:23, Transit: 11:52. Moon - Rise: 12:11, Set: 01:45. Civil Dark: 16:56 - 06:49. Nautical Dark: 17:31 - 06:13. Astro Dark: 18:06 - 05:39

Total Clouds (% Sky Obscured)

100
97
95
94
93
92
90
85
78
68
56
44
34
43
51
60
64
70
75
53
31
9

Low Clouds (% Sky Obscured)

82
78
74
68
57
46
34
31
29
26
24
23
19
31
42
54
59
64
69
49
29
9

Medium Clouds (% Sky Obscured)

100
97
95
93
90
87
89
82
70
57
40
23
5
6
8
9
7
6
4
3
1
0

High Clouds (% Sky Obscured)

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

ISS Passover

Visibility (miles)

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

Precipitation Type

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

Precipitation Probability (%)

95
95
80
44
39
32
20
28
28
18
27
26
10
23
24
19
20
21
19
24
20
10

Precipitation Amount (mm)

0.8
0.7
0.5
0.1
0.1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-4
-5
-5
-5
-5
-10
-11
-12
-12
-12
-13
-12
-11
-10
-11
-11
-10
-12
-12
-12
-12
-13

Dew Point (°C)

-4
-5
-6
-6
-7
-8
-9
-9
-9
-9
-9
-9
-9
-9
-9
-9
-9
-11
-12
-13
-14
-15

Relative Humidity (%)

83
79
78
75
73
75
77
79
80
82
83
80
77
76
76
76
76
74
72
72
73
75

Pressure (mb)

994
993
993
992
992
991
991
991
991
991
991
992
992
992
992
992
992
993
994
995
996
998

Ozone (du)

414
419
421
424
426
426
426
426
425
424
423
412
401
390
385
380
375
378
382
386
383
380

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

Generated: 22/12/25 21:45:46. Forecast: 22/12/25 to 28/12/25. Timezone: UTC-5.00