Clear Outside v1.0 - International Weather Forecasts For Astronomers

Saturday 27

First Quarter 52%

11:52

01:00

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

Sun - Rise: 07:55, Set: 16:43, Transit: 12:19. Moon - Rise: 11:52, Set: 01:00. Civil Dark: 17:17 - 07:22. Nautical Dark: 17:54 - 06:44. Astro Dark: 18:30 - 06:09

Total Clouds (% Sky Obscured)

61
48
37
24
20
24
6
12
26
66
60
97
98
99
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
62
100
100
100
100
100
100
100
83
67
66

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
12
19
15
38
70
83
91
92
96
92
83
94
84
93
100
100

High Clouds (% Sky Obscured)

0
0
0
3
2
4
6
12
26
66
60
94
97
99
100
100
91
100
100
100
100
100
100
100

ISS Passover

Visibility (miles)

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

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
2
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-13
-12
-11
-9
-9
-9
-10
-11
-14
-15
-15
-15
-15
-16
-16
-15
-14
-15
-14
-14
-14
-13
-12
-12

Dew Point (°C)

-14
-12
-11
-10
-9
-8
-8
-10
-12
-12
-12
-12
-13
-13
-13
-12
-12
-11
-11
-10
-10
-9
-9
-9

Relative Humidity (%)

81
81
82
80
80
84
90
92
90
88
90
90
90
90
90
90
90
90
90
90
90
92
90
90

Pressure (mb)

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

Ozone (du)

334
337
335
336
332
329
324
322
317
320
318
316
317
319
319
319
318
318
317
317
319
321
321
324

Sunday 28

Waxing Gibbous 63%

12:12

02:17

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
09 Bad

Sun - Rise: 07:55, Set: 16:44, Transit: 12:20. Moon - Rise: 12:12, Set: 02:17. Civil Dark: 17:18 - 07:22. Nautical Dark: 17:55 - 06:45. Astro Dark: 18:30 - 06:09

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

63
59
51
45
33
77
96
92
92
96
94
87
100
94
85
88
90
100
100
100
100
100
100
95

Medium Clouds (% Sky Obscured)

94
88
94
99
100
100
100
100
100
100
100
100
100
100
100
100
100
100
45
78
60
55
95
100

High Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
75
0
0
0
0

ISS Passover

Visibility (miles)

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

Fog (%)

4
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
Snow
Frozen rai
Frozen rai
Frozen rai
Frozen rai
Frozen rai
Frozen rai
Frozen rai
Frozen rai
Frozen rai
Frozen rai
Frozen rai
Frozen rai
Frozen rai
Moderate Rain
Frozen rai
Light Rain
Frozen rai
None
Light Rain
Light Rain

Precipitation Probability (%)

2
7
8
69
91
95
95
93
91
95
95
89
70
82
95
95
95
95
95
94
87
61
80
79

Precipitation Amount (mm)

0
0
0
0.4
0.5
1.3
0.8
0.6
0.5
0.5
1
0.6
0.3
0.3
1.7
1.5
1.3
3.2
1.5
0.7
0.5
0
0.4
0.4

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

90
92
92
89
91
91
92
92
92
91
92
92
92
94
94
94
94
94
98
100
100
96
86
84

Pressure (mb)

1017
1016
1014
1012
1011
1010
1009
1008
1007
1005
1003
1001
999
997
995
993
991
989
987
985
984
984
984
985

Ozone (du)

326
328
328
328
326
329
330
327
325
323
323
324
325
327
330
329
329
334
337
349
357
372
389
402

Monday 29

Waxing Gibbous 74%

12:35

03:39

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
09 Bad

Sun - Rise: 07:55, Set: 16:45, Transit: 12:20. Moon - Rise: 12:35, Set: 03:39. Civil Dark: 17:18 - 07:22. Nautical Dark: 17:56 - 06:45. Astro Dark: 18:31 - 06:09

Total Clouds (% Sky Obscured)

98
100
100
100
100
99
100
100
100
98
98
94
100
100
98
98
98
98
99
100
98
96
95
94

Low Clouds (% Sky Obscured)

95
100
90
98
100
91
100
100
96
86
89
90
91
91
93
93
92
92
89
94
93
92
92
90

Medium Clouds (% Sky Obscured)

94
100
100
91
100
90
91
97
100
92
90
90
100
94
57
44
35
36
91
100
58
35
36
65

High Clouds (% Sky Obscured)

0
0
0
51
70
70
48
65
1
0
45
0
0
0
0
0
0
0
0
37
0
0
0
43

ISS Passover

Visibility (miles)

0
0
0
1
0
0
0
0
3
0
0
0
0
0
0
1
3
7
9
5
2
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

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

Precipitation Probability (%)

90
78
79
61
78
94
95
70
65
69
68
66
58
52
43
33
35
32
37
34
36
27
31
33

Precipitation Amount (mm)

0.7
0.5
0.3
0.2
0.5
0.8
1
0.3
0.2
0.3
0.3
0.3
0.2
0.1
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

13
14
14
16
16
14
15
11
15
13
19
17
17
17
16
16
16
17
16
16
16
16
15
14

Chance of Frost

Temperature (°C)

1
0
-1
-1
-2
-3
-3
-5
-6
-8
-10
-11
-11
-11
-11
-12
-12
-13
-13
-13
-14
-14
-14
-14

Feels Like (°C)

-5
-6
-7
-8
-9
-9
-9
-9
-12
-14
-18
-18
-18
-18
-18
-19
-19
-20
-20
-20
-21
-21
-21
-20

Dew Point (°C)

-1
-2
-3
-3
-3
-4
-4
-5
-7
-9
-11
-12
-13
-13
-13
-14
-15
-16
-16
-16
-16
-17
-17
-17

Relative Humidity (%)

88
88
87
86
91
91
92
96
90
94
88
86
86
86
85
81
79
76
76
78
79
74
76
78

Pressure (mb)

985
984
983
982
981
981
980
979
982
984
987
989
991
992
993
994
996
997
998
999
1000
1001
1002
1003

Ozone (du)

417
419
418
415
413
420
426
429
431
415
403
393
379
372
379
389
399
398
404
418
436
438
437
438

Tuesday 30

Waxing Gibbous 84%

13:05

05:03

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

Sun - Rise: 07:55, Set: 16:46, Transit: 12:21. Moon - Rise: 13:05, Set: 05:03. Civil Dark: 17:19 - 07:22. Nautical Dark: 17:56 - 06:45. Astro Dark: 18:32 - 06:09

Total Clouds (% Sky Obscured)

96
96
97
92
87
82
65
50
35
35
9
3
12
24
38
56
71
80
82
84
88
90
89
90

Low Clouds (% Sky Obscured)

91
91
93
91
87
82
65
50
35
30
2
0
0
0
0
22
48
71
73
73
74
72
72
71

Medium Clouds (% Sky Obscured)

49
43
92
78
60
45
45
45
35
33
2
1
10
21
33
52
59
80
74
57
50
77
67
50

High Clouds (% Sky Obscured)

50
32
3
25
10
10
4
0
5
2
1
1
0
0
0
2
2
1
3
3
1
1
0
0

ISS Passover

Visibility (miles)

8
8
5
2
1
1
0
0
0
1
9
9
9
9
9
9
9
9
4
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
Snow
Snow
Snow
Snow
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

33
36
33
37
45
52
56
49
35
12
8
2
5
6
5
14
16
9
31
37
36
39
36
29

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

14
14
14
15
14
14
14
14
14
14
14
13
12
12
11
10
10
10
10
8
7
7
7
7

Chance of Frost

Temperature (°C)

-14
-13
-13
-12
-12
-12
-12
-12
-12
-12
-12
-12
-12
-12
-13
-13
-13
-12
-13
-13
-13
-12
-12
-12

Feels Like (°C)

-20
-20
-19
-19
-19
-18
-18
-19
-19
-19
-19
-18
-18
-18
-17
-17
-18
-18
-19
-18
-17
-17
-17
-16

Dew Point (°C)

-17
-16
-15
-15
-15
-14
-13
-14
-14
-14
-16
-17
-17
-17
-17
-17
-17
-17
-16
-14
-14
-14
-14
-13

Relative Humidity (%)

78
78
79
79
81
83
86
86
86
83
70
69
66
66
67
70
69
67
75
90
90
90
88
90

Pressure (mb)

1003
1003
1003
1003
1003
1003
1004
1004
1005
1005
1005
1005
1005
1005
1005
1005
1005
1005
1005
1005
1005
1006
1006
1006

Ozone (du)

441
455
454
443
438
435
432
420
413
409
404
404
399
393
392
384
383
378
376
371
366
367
368
368

Wednesday 31

Waxing Gibbous 92%

13:43

06:24

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 OK
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad

Sun - Rise: 07:55, Set: 16:47, Transit: 12:21. Moon - Rise: 13:43, Set: 06:24. Civil Dark: 17:20 - 07:22. Nautical Dark: 17:57 - 06:45. Astro Dark: 18:33 - 06:10

Total Clouds (% Sky Obscured)

91
92
93
95
97
100
99
99
98
79
63
45
24
25
23
24
29
35
51
52
58
63
67
73

Low Clouds (% Sky Obscured)

75
82
87
87
89
91
87
81
76
61
49
38
24
25
23
22
27
34
29
29
32
43
52
59

Medium Clouds (% Sky Obscured)

49
50
52
84
94
83
80
95
70
65
57
44
20
25
23
24
29
35
46
48
50
50
46
42

High Clouds (% Sky Obscured)

0
1
0
1
2
6
5
6
0
5
15
20
15
20
12
2
1
0
0
0
0
0
0
0

ISS Passover

Visibility (miles)

1
3
6
6
3
7
8
3
0
0
0
0
1
4
6
6
6
6
5
6
7
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
Snow
Snow
Snow
Snow
Snow
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

24
27
9
25
34
38
45
56
67
60
50
33
30
29
14
26
25
19
25
23
11
18
17
7

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

-11
-10
-9
-8
-9
-9
-10
-10
-11
-11
-12
-13
-13
-14
-15
-16
-19
-19
-19
-19
-20
-20
-19
-19

Feels Like (°C)

-17
-16
-15
-15
-14
-15
-15
-15
-16
-16
-16
-18
-18
-19
-19
-20
-22
-22
-21
-21
-21
-20
-23
-23

Dew Point (°C)

-13
-12
-12
-11
-11
-12
-13
-13
-12
-12
-13
-14
-15
-17
-18
-19
-21
-21
-21
-21
-22
-22
-22
-23

Relative Humidity (%)

86
83
82
80
82
82
78
81
90
90
90
86
86
81
78
80
81
82
85
84
81
80
76
72

Pressure (mb)

1006
1006
1006
1005
1005
1005
1006
1006
1007
1007
1007
1007
1008
1008
1008
1008
1007
1007
1007
1007
1007
1008
1008
1008

Ozone (du)

370
367
364
363
363
361
360
357
359
363
364
356
354
351
350
349
352
356
360
365
371
376
394
411

Thursday 1

Waxing Gibbous 98%

14:35

07:36

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
09 Bad

Sun - Rise: 07:55, Set: 16:48, Transit: 12:22. Moon - Rise: 14:35, Set: 07:36. Civil Dark: 17:21 - 07:22. Nautical Dark: 17:58 - 06:45. Astro Dark: 18:34 - 06:10

Total Clouds (% Sky Obscured)

72
72
71
79
88
97
99
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

60
61
61
70
82
94
96
98
100
97
93
89
93
96
100
100
100
100
100
100
100
100
100
100

Medium Clouds (% Sky Obscured)

32
21
10
18
27
40
43
55
62
81
87
92
90
89
87
84
75
70
77
83
90
78
66
55

High Clouds (% Sky Obscured)

0
0
0
0
0
0
9
20
37
43
50
42
16
11
2
2
2
1
1
1
1
3
7
7

ISS Passover

Visibility (miles)

9
8
7
5
4
2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1

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
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow

Precipitation Probability (%)

15
15
7
25
33
38
47
57
67
68
69
71
63
65
74
61
63
75
65
66
76
72
71
74

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

-18
-16
-14
-12
-11
-11
-10
-11
-11
-12
-13
-13
-13
-12
-12
-12
-11
-11
-11
-12
-13
-14
-13
-13

Feels Like (°C)

-23
-22
-21
-19
-14
-14
-13
-14
-15
-16
-16
-18
-18
-17
-17
-17
-16
-16
-16
-16
-14
-14
-18
-18

Dew Point (°C)

-23
-20
-18
-16
-14
-13
-12
-12
-13
-14
-14
-14
-14
-14
-13
-13
-13
-13
-13
-14
-14
-15
-15
-15

Relative Humidity (%)

66
69
71
73
76
83
87
88
88
88
88
88
88
86
88
88
88
88
88
88
88
88
86
86

Pressure (mb)

1008
1007
1007
1006
1006
1005
1005
1005
1005
1005
1005
1004
1004
1004
1003
1003
1002
1002
1002
1002
1002
1003
1003
1003

Ozone (du)

428
424
419
415
429
444
458
429
401
372
364
355
347
345
344
343
343
343
342
347
352
357
366
375

Friday 2

Waxing Gibbous 100%

15:42

08:32

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

Sun - Rise: 07:55, Set: 16:49, Transit: 12:22. Moon - Rise: 15:42, Set: 08:32. Civil Dark: 17:22 - 07:22. Nautical Dark: 17:59 - 06:45. Astro Dark: 18:34 - 06:10

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
97
94
90
76
61
47

Low Clouds (% Sky Obscured)

100
100
100
99
100
100
100
100
100
100
100
100
100
100
100
94
89
82
72
58
41

Medium Clouds (% Sky Obscured)

58
61
67
70
73
83
89
94
100
100
100
100
73
44
16
34
49
65
44
23
1

High Clouds (% Sky Obscured)

7
2
2
3
4
5
3
2
1
2
1
0
0
0
0
0
0
0
0
0
0

ISS Passover

Visibility (miles)

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

Fog (%)

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
Snow
None
None
None
None

Precipitation Probability (%)

70
62
54
62
60
53
64
66
72
73
75
80
72
64
64
59
51
29
34
34
19

Precipitation Amount (mm)

0.5
0.3
0.1
0.3
0.3
0.1
0.4
0.4
0.5
0.6
0.6
0.8
0.6
0.4
0.3
0.3
0.2
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-17
-17
-18
-18
-14
-14
-14
-14
-13
-14
-15
-14
-15
-14
-13
-12
-18
-18
-18
-18
-19

Dew Point (°C)

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

Relative Humidity (%)

84
85
85
85
86
88
90
90
90
90
92
92
92
90
90
86
86
84
84
83
82

Pressure (mb)

1003
1003
1003
1002
1003
1003
1003
1003
1003
1003
1003
1003
1003
1004
1004
1005
1005
1006
1007
1008
1009

Ozone (du)

384
392
401
409
418
427
436
427
419
411
409
407
405
393
380
367
367
368
368
369
369

Forecast for Glen Echo, Canada (44.94,-79.51)

Generated: 27/12/25 10:22:14. Forecast: 27/12/25 to 02/01/26. Timezone: UTC-5.00