Clear Outside v1.0 - International Weather Forecasts For Astronomers

Wednesday 31

Waxing Gibbous 92%

13:16

04:40

04 Bad
05 Bad
06 Bad
07 Bad
08 OK
09 OK
10 OK
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

Sun - Rise: 07:34, Set: 16:21, Transit: 11:57. Moon - Rise: 13:16, Set: 04:40. Civil Dark: 16:55 - 07:00. Nautical Dark: 17:32 - 06:22. Astro Dark: 18:08 - 05:46

Total Clouds (% Sky Obscured)

94
96
97
97
17
16
31
71
100
100
90
87
100
100
100
100
96
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

76
69
70
63
0
0
0
0
1
10
2
35
45
26
25
46
73
79
89
96
95
93
94
95

Medium Clouds (% Sky Obscured)

92
96
94
75
7
4
26
71
100
100
87
78
100
100
93
100
93
100
100
100
100
100
100
100

High Clouds (% Sky Obscured)

25
25
35
21
14
16
28
40
45
90
84
25
62
100
91
75
40
20
0
0
0
0
0
0

ISS Passover

Visibility (miles)

1
4
9
9
9
9
9
9
9
9
9
9
9
8
4
2
1
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
None
None
None
None
None
Snow
Snow
Snow
Snow
Snow
Snow
Snow

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
0
1
2
5
7
12
30
47
68
81
93
92
83
77

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.1
0.4
0.5
0.8
0.7
0.5
0.4

Wind Speed/Direction (mph)

12
12
13
13
13
13
14
13
13
12
10
9
7
5
3
2
2
2
3
5
7
9
10
11

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-17
-16
-17
-18
-17
-16
-16
-15
-14
-13
-13
-12
-12
-12
-11
-11
-11
-10
-11
-11
-11
-11
-12
-12

Relative Humidity (%)

79
78
71
70
71
72
72
72
71
72
74
75
78
82
87
88
90
92
92
92
92
92
90
88

Pressure (mb)

1000
1000
1000
1001
1002
1003
1003
1003
1002
1002
1002
1002
1002
1002
1002
1002
1002
1001
1000
999
999
998
998
998

Ozone (du)

401
404
407
400
389
382
385
397
404
411
413
415
415
411
410
408
413
417
415
421
431
434
432
421

Thursday 1

Waxing Gibbous 98%

14:07

06:02

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

Sun - Rise: 07:34, Set: 16:22, Transit: 11:58. Moon - Rise: 14:07, Set: 06:02. Civil Dark: 16:56 - 07:00. Nautical Dark: 17:33 - 06:23. Astro Dark: 18:09 - 05:47

Total Clouds (% Sky Obscured)

100
99
100
99
96
77
22
3
10
54
59
22
55
55
21
0
1
4
55
55
55
50
50
10

Low Clouds (% Sky Obscured)

100
99
99
97
89
73
22
1
10
35
40
13
30
29
0
0
0
2
25
20
15
10
18
2

Medium Clouds (% Sky Obscured)

90
81
48
43
49
52
8
0
0
0
3
3
55
50
20
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
2
3
0
0
0
0
0
0
0
0
0
0
0
0

ISS Passover

Visibility (miles)

0
0
0
2
1
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

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

Precipitation Probability (%)

82
66
48
37
27
15
3
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2
2

Precipitation Amount (mm)

0.5
0.3
0.2
0.1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

11
10
10
9
11
12
13
13
13
13
13
13
11
11
10
8
7
5
4
4
4
4
4
3

Chance of Frost

Temperature (°C)

-11
-11
-11
-12
-12
-13
-14
-15
-15
-15
-15
-16
-16
-17
-17
-18
-18
-19
-20
-20
-21
-21
-21
-22

Feels Like (°C)

-17
-16
-16
-17
-18
-20
-20
-20
-19
-20
-21
-22
-21
-23
-23
-22
-21
-21
-22
-25
-25
-26
-26
-26

Dew Point (°C)

-12
-13
-13
-13
-15
-16
-17
-18
-18
-18
-18
-19
-20
-20
-21
-21
-22
-22
-22
-23
-24
-24
-24
-24

Relative Humidity (%)

90
88
90
86
81
78
77
75
73
75
75
75
74
74
72
72
73
76
79
74
72
75
77
78

Pressure (mb)

998
999
1001
1002
1003
1005
1006
1006
1006
1006
1007
1007
1007
1008
1008
1009
1009
1008
1008
1008
1008
1008
1008
1008

Ozone (du)

402
401
390
384
371
355
354
349
344
342
343
353
365
376
373
376
369
361
357
359
359
360
356
359

Friday 2

Waxing Gibbous 100%

15:14

07:14

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

Sun - Rise: 07:34, Set: 16:23, Transit: 11:58. Moon - Rise: 15:14, Set: 07:14. Civil Dark: 16:57 - 07:00. Nautical Dark: 17:34 - 06:23. Astro Dark: 18:10 - 05:47

Total Clouds (% Sky Obscured)

11
31
84
86
76
71
54
70
46
69
52
28
52
29
27
81
90
92
80
85
81
76
72
64

Low Clouds (% Sky Obscured)

4
10
71
82
74
68
48
67
21
64
46
28
52
29
26
63
75
73
42
60
53
56
59
63

Medium Clouds (% Sky Obscured)

0
0
5
0
0
2
8
1
4
0
0
0
0
2
2
34
40
43
38
76
81
76
72
54

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
2
0
0
0
0
0
0
0
0
0
2
2
0
0
2
2
0

ISS Passover

Visibility (miles)

9
9
9
9
9
3
2
3
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
1
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 (%)

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

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

Chance of Frost

Temperature (°C)

-22
-22
-22
-22
-21
-20
-18
-16
-14
-13
-12
-12
-12
-12
-13
-13
-13
-13
-13
-13
-14
-14
-14
-14

Feels Like (°C)

-24
-25
-25
-26
-25
-24
-22
-21
-19
-18
-17
-16
-15
-15
-15
-16
-16
-16
-16
-17
-17
-17
-17
-17

Dew Point (°C)

-25
-25
-25
-24
-24
-23
-20
-18
-17
-16
-15
-14
-14
-14
-15
-15
-15
-16
-16
-16
-17
-17
-17
-17

Relative Humidity (%)

79
79
77
77
74
77
80
81
79
74
76
80
81
84
84
83
84
83
81
79
76
78
76
76

Pressure (mb)

1007
1007
1007
1007
1007
1007
1007
1007
1006
1005
1005
1005
1005
1005
1006
1006
1006
1006
1007
1007
1007
1007
1008
1009

Ozone (du)

366
357
354
359
357
353
353
367
381
371
360
360
365
367
370
370
388
390
385
381
353
351
345
347

Saturday 3

Full Moon 99%

16:33

08:10

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

Sun - Rise: 07:34, Set: 16:24, Transit: 11:59. Moon - Rise: 16:33, Set: 08:10. Civil Dark: 16:57 - 07:00. Nautical Dark: 17:35 - 06:23. Astro Dark: 18:11 - 05:47

Total Clouds (% Sky Obscured)

67
91
92
70
44
10
26
46
67
54
42
40
42
54
59
70
79
88
92
95
100
100
100
100

Low Clouds (% Sky Obscured)

62
84
90
70
44
10
19
46
67
54
42
40
10
9
7
6
62
80
80
75
75
75
75
89

Medium Clouds (% Sky Obscured)

56
80
62
29
15
0
0
0
0
0
2
33
42
54
59
70
79
88
92
95
100
100
100
100

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
1
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
Snow
None
Snow

Precipitation Probability (%)

7
8
8
7
6
3
4
3
1
0
0
0
0
0
0
0
0
0
0
6
30
35
31
37

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.1
0
0.1

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

-15
-15
-15
-15
-15
-16
-16
-15
-15
-15
-15
-15
-15
-16
-16
-17
-17
-17
-17
-17
-16
-16
-16
-15

Feels Like (°C)

-18
-18
-20
-20
-20
-20
-19
-19
-19
-20
-20
-20
-20
-20
-20
-21
-21
-21
-21
-21
-21
-20
-20
-19

Dew Point (°C)

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

Relative Humidity (%)

76
77
76
75
76
76
72
70
70
70
70
74
76
77
79
80
81
80
81
80
82
86
86
88

Pressure (mb)

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

Ozone (du)

344
347
362
372
376
371
368
366
366
363
361
361
361
364
362
363
361
361
360
358
356
359
363
365

Sunday 4

Waning Gibbous 95%

17:56

08:52

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
00 Bad
01 Bad
02 OK
03 OK

Sun - Rise: 07:34, Set: 16:25, Transit: 11:59. Moon - Rise: 17:56, Set: 08:52. Civil Dark: 16:58 - 07:00. Nautical Dark: 17:36 - 06:23. Astro Dark: 18:12 - 05:47

Total Clouds (% Sky Obscured)

97
94
91
91
93
92
88
94
96
94
94
96
95
85
87
90
93
98
79
60
41
30
19
22

Low Clouds (% Sky Obscured)

82
77
77
71
65
63
68
78
84
82
81
85
86
73
74
67
50
39
30
34
41
30
19
22

Medium Clouds (% Sky Obscured)

85
70
55
61
68
45
35
29
26
15
6
0
0
0
0
0
0
0
0
0
0
2
3
6

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
2
3
9

ISS Passover

Visibility (miles)

0
1
1
1
2
5
8
9
2
1
1
3
7
2
1
3
5
7
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 (%)

25
28
24
19
16
6
6
8
20
19
10
7
5
12
2
10
10
4
9
7
1
1
1
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
3
3
3
3
3
4
4
5
5
5
5
4
4
4
4
4
3
3
3
3
3
2
3

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-19
-19
-19
-19
-19
-18
-18
-17
-16
-16
-16
-16
-16
-17
-17
-18
-18
-17
-18
-18
-18
-18
-21
-22

Dew Point (°C)

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

Relative Humidity (%)

88
88
88
88
88
84
83
79
79
81
83
81
85
88
90
90
86
84
81
81
78
77
78
77

Pressure (mb)

1016
1017
1017
1017
1018
1018
1019
1018
1018
1018
1018
1018
1018
1019
1019
1020
1020
1021
1021
1021
1022
1022
1022
1023

Ozone (du)

361
362
361
358
358
361
352
346
341
338
334
335
336
337
338
339
345
350
356
360
363
367
368
368

Monday 5

Waning Gibbous 89%

19:17

09:23

04 OK
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
00 Bad
01 Bad
02 Bad
03 Bad

Sun - Rise: 07:33, Set: 16:26, Transit: 12:00. Moon - Rise: 19:17, Set: 09:23. Civil Dark: 16:59 - 07:00. Nautical Dark: 17:37 - 06:22. Astro Dark: 18:12 - 05:47

Total Clouds (% Sky Obscured)

26
30
47
57
62
58
67
75
82
91
95
98
95
90
86
89
92
99
99
99
100
96
92
87

Low Clouds (% Sky Obscured)

26
30
47
57
62
58
67
75
82
91
95
96
92
90
86
89
92
93
93
93
94
90
87
84

Medium Clouds (% Sky Obscured)

15
26
36
43
51
55
55
50
41
39
33
41
51
53
57
53
50
50
34
18
0
10
19
29

High Clouds (% Sky Obscured)

14
13
12
9
14
20
15
5
5
20
19
24
35
29
7
5
5
3
1
1
0
1
2
3

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
7
4
1
1
0
0
1
1
1
2
2

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

Precipitation Probability (%)

0
0
0
0
1
2
32
49
64
74
82
86
80
73
65
65
65
67
66
62
55
47
37
25

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

-20
-21
-21
-21
-20
-19
-18
-16
-15
-14
-14
-13
-13
-13
-13
-14
-14
-14
-14
-13
-13
-13
-13
-14

Feels Like (°C)

-23
-23
-22
-22
-23
-22
-22
-21
-21
-21
-18
-17
-18
-18
-17
-18
-18
-18
-18
-18
-18
-18
-17
-17

Dew Point (°C)

-23
-23
-24
-24
-23
-22
-21
-20
-19
-17
-17
-16
-16
-16
-16
-16
-15
-15
-15
-15
-14
-14
-15
-16

Relative Humidity (%)

74
75
75
76
76
74
74
74
75
75
76
78
81
81
83
83
86
86
88
90
90
90
88
88

Pressure (mb)

1023
1023
1023
1023
1023
1023
1023
1021
1020
1019
1018
1017
1016
1016
1016
1015
1015
1015
1015
1015
1015
1015
1015
1015

Ozone (du)

369
370
371
373
374
375
376
375
374
373
372
371
370
373
376
378
378
378
378
377
376
374
370
366

Tuesday 6

Waning Gibbous 81%

20:33

09:47

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
00 Bad

Sun - Rise: 07:33, Set: 16:27, Transit: 12:00. Moon - Rise: 20:33, Set: 09:47. Civil Dark: 17:00 - 07:00. Nautical Dark: 17:38 - 06:22. Astro Dark: 18:13 - 05:47

Total Clouds (% Sky Obscured)

89
90
89
86
74
72
90
98
99
100
100
100
100
99
97
97
97
98
99
99
99

Low Clouds (% Sky Obscured)

81
78
75
73
71
68
67
65
69
72
75
76
77
80
81
84
84
84
84
85
83

Medium Clouds (% Sky Obscured)

45
59
74
67
59
60
75
77
80
86
92
97
94
90
85
84
84
87
93
95
98

High Clouds (% Sky Obscured)

6
9
13
19
21
26
40
47
54
81
91
100
95
95
95
95
95
95
95
95
95

ISS Passover

Visibility (miles)

3
3
3
3
2
2
2
1
1
1
3
5
8
5
3
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

Precipitation Type

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

Precipitation Probability (%)

21
16
4
7
6
2
7
10
10
10
10
11
18
27
34
41
51
62
72
81
89

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.1
0.1
0.2
0.3
0.4
0.5
0.7

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

-15
-15
-15
-15
-14
-12
-11
-10
-8
-7
-7
-7
-7
-7
-7
-7
-7
-7
-7
-6
-5

Feels Like (°C)

-17
-17
-17
-18
-18
-18
-17
-17
-16
-16
-10
-10
-11
-11
-11
-11
-11
-11
-11
-12
-12

Dew Point (°C)

-17
-16
-16
-16
-15
-14
-12
-11
-10
-8
-8
-8
-8
-8
-8
-7
-8
-8
-7
-7
-6

Relative Humidity (%)

86
88
88
88
88
88
88
88
87
89
89
90
92
92
94
96
94
94
96
96
96

Pressure (mb)

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

Ozone (du)

362
363
364
366
366
366
365
362
358
355
355
356
356
359
362
365
365
364
364
364
365

Forecast for Le Vieux-Port, Montréal, Canada (45.50,-73.57)

Generated: 31/12/25 04:41:10. Forecast: 31/12/25 to 06/01/26. Timezone: UTC-5.00