Clear Outside v1.0 - International Weather Forecasts For Astronomers

Wednesday 10

Waning Gibbous 65%

22:54

11:46

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
21 Bad
22 Bad
23 Bad

Sun - Rise: 07:24, Set: 16:10, Transit: 11:47. Moon - Rise: 22:54, Set: 11:46. Civil Dark: 16:44 - 06:50. Nautical Dark: 17:22 - 06:12. Astro Dark: 17:58 - 05:36

Total Clouds (% Sky Obscured)

100
99
98
93
97
99
100
100
100
100
100
100
100
100
100
100
99
100
100
100
98
100
100
99

Low Clouds (% Sky Obscured)

86
89
93
86
87
83
86
92
84
88
96
100
100
100
92
86
85
87
86
83
90
90
89
88

Medium Clouds (% Sky Obscured)

84
85
96
81
48
56
70
100
100
100
100
100
100
100
100
100
96
100
100
100
91
100
98
95

High Clouds (% Sky Obscured)

26
11
7
6
2
63
100
100
61
100
100
100
100
100
100
100
70
100
25
30
25
30
30
59

ISS Passover

Visibility (miles)

3
1
0
3
2
0
1
3
9
9
9
0
0
0
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

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

Precipitation Probability (%)

51
50
49
46
39
34
38
28
20
19
45
95
95
95
95
95
88
79
72
73
71
70
90
91

Precipitation Amount (mm)

0.2
0.1
0.2
0
0
0
0.1
0
0
0
0
0.8
1.2
1.9
1.6
1.1
0.6
0.5
0.4
0.4
0.4
0.3
0.7
0.6

Wind Speed/Direction (mph)

6
6
6
11
11
10
8
8
7
8
9
9
8
7
7
7
6
5
6
6
6
7
7
8

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

83
83
92
85
84
92
87
89
87
89
87
96
98
96
98
98
96
98
98
100
98
98
98
98

Pressure (mb)

1006
1005
1005
1004
1003
1003
1002
1002
1001
1001
1000
998
997
995
994
993
993
992
992
992
991
990
990
989

Ozone (du)

383
373
363
350
345
337
334
333
329
328
328
331
330
324
322
324
331
334
338
343
347
344
341
345

Thursday 11

Third Quarter 55%

00:02

12:04

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
21 Bad
22 Bad
23 Bad

Sun - Rise: 07:25, Set: 16:10, Transit: 11:48. Moon - Rise: 00:02, Set: 12:04. Civil Dark: 16:44 - 06:51. Nautical Dark: 17:22 - 06:13. Astro Dark: 17:58 - 05:37

Total Clouds (% Sky Obscured)

100
98
96
96
97
96
95
95
97
96
100
100
99
99
100
100
100
100
98
98
100
100
100
100

Low Clouds (% Sky Obscured)

86
86
86
87
89
90
89
88
90
93
93
92
91
93
92
92
91
92
94
94
98
92
89
89

Medium Clouds (% Sky Obscured)

89
89
88
81
47
45
45
38
40
37
45
50
61
97
100
100
100
100
88
86
96
100
100
100

High Clouds (% Sky Obscured)

61
23
21
1
0
2
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
2
1
1
1
4
3
2
2
2
1
0
0
0
0
1
1
1
1
1

Fog (%)

0
0
0
0
0
0
1
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
Snow
None
None
None
None
None
None
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
None
None
None

Precipitation Probability (%)

77
78
68
50
43
39
39
31
32
30
29
33
36
42
44
49
48
53
47
41
39
36
23
14

Precipitation Amount (mm)

0.3
0.4
0.3
0.1
0.1
0
0.1
0
0
0
0
0
0
0.1
0.1
0.2
0.2
0.2
0.2
0.1
0.1
0
0
0

Wind Speed/Direction (mph)

9
9
10
12
12
14
16
17
17
17
18
18
18
17
17
17
16
16
16
16
16
17
17
17

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-9
-9
-9
-10
-11
-12
-13
-15
-16
-16
-17
-17
-17
-18
-18
-18
-18
-18
-18
-18
-18
-19
-18
-18

Dew Point (°C)

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

Relative Humidity (%)

98
96
98
98
94
89
89
87
85
85
83
81
83
81
83
83
85
85
83
83
83
83
85
83

Pressure (mb)

989
989
989
989
991
991
992
993
994
995
996
995
995
995
995
996
996
996
997
997
997
998
998
999

Ozone (du)

349
351
351
352
356
358
361
365
372
380
387
390
391
390
392
400
402
406
406
411
412
413
410
407

Friday 12

Waning Crescent 44%

00:02

12:20

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 OK
18 OK
19 OK
20 OK
21 Good
22 OK
23 Bad

Sun - Rise: 07:25, Set: 16:11, Transit: 11:48. Moon - Rise: 00:02, Set: 12:20. Civil Dark: 16:45 - 06:51. Nautical Dark: 17:22 - 06:14. Astro Dark: 17:58 - 05:38

Total Clouds (% Sky Obscured)

100
100
100
100
100
99
95
90
84
81
78
82
92
86
84
78
39
34
36
26
17
8
28
49

Low Clouds (% Sky Obscured)

81
48
45
69
80
72
70
69
68
61
36
34
35
33
33
33
26
30
34
25
17
8
25
41

Medium Clouds (% Sky Obscured)

100
100
100
100
100
96
82
70
56
41
63
62
54
35
37
63
39
9
15
10
5
0
19
35

High Clouds (% Sky Obscured)

0
0
0
0
0
2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
4
10

ISS Passover

Visibility (miles)

3
4
7
8
7
9
9
9
9
9
9
9
8
8
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 (%)

21
7
6
5
4
2
2
1
0
0
0
0
0
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)

17
17
17
17
17
17
17
16
15
15
15
15
15
15
14
14
13
13
12
11
10
9
9
8

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

81
81
78
78
80
80
80
80
80
81
83
83
87
85
85
83
82
82
80
79
80
82
83
83

Pressure (mb)

999
1000
1001
1002
1003
1003
1004
1005
1006
1007
1008
1008
1008
1008
1009
1009
1010
1011
1011
1012
1012
1012
1013
1013

Ozone (du)

402
397
391
386
380
375
374
370
372
366
361
363
364
365
365
364
365
363
362
366
360
365
367
366

Saturday 13

Waning Crescent 34%

01:08

12:36

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
21 Bad
22 Bad
23 Bad

Sun - Rise: 07:26, Set: 16:11, Transit: 11:48. Moon - Rise: 01:08, Set: 12:36. Civil Dark: 16:45 - 06:52. Nautical Dark: 17:22 - 06:15. Astro Dark: 17:58 - 05:39

Total Clouds (% Sky Obscured)

74
80
86
88
94
95
95
94
98
100
89
86
85
86
87
89
92
95
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

55
46
36
24
46
59
71
65
66
74
66
66
77
86
87
89
92
95
98
96
91
86
84
78

Medium Clouds (% Sky Obscured)

56
56
62
62
59
66
78
57
86
100
77
76
73
80
75
70
74
78
99
99
100
97
81
80

High Clouds (% Sky Obscured)

14
10
6
0
0
1
0
0
0
0
0
0
0
0
0
0
3
7
11
39
71
100
67
33

ISS Passover

Visibility (miles)

9
9
9
9
9
4
3
3
3
9
9
5
3
1
0
0
0
0
0
0
0
0
1
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
None
Snow
Snow
Snow
Snow
Snow
None
None
None
None

Precipitation Probability (%)

0
1
2
1
4
6
8
9
9
7
23
32
43
39
35
49
65
69
58
45
29
19
15
25

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

83
85
87
88
88
90
90
90
90
90
89
89
87
89
91
96
94
96
94
96
94
94
94
94

Pressure (mb)

1013
1013
1013
1013
1013
1013
1013
1013
1013
1013
1012
1012
1011
1011
1011
1011
1011
1012
1012
1013
1013
1014
1014
1014

Ozone (du)

364
363
362
362
367
365
366
367
369
366
370
370
369
368
369
372
376
375
368
371
372
368
362
359

Sunday 14

Waning Crescent 25%

02:13

12:53

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
21 OK
22 OK
23 Bad

Sun - Rise: 07:27, Set: 16:11, Transit: 11:49. Moon - Rise: 02:13, Set: 12:53. Civil Dark: 16:45 - 06:53. Nautical Dark: 17:23 - 06:15. Astro Dark: 17:59 - 05:39

Total Clouds (% Sky Obscured)

100
99
98
98
96
95
95
95
96
98
98
98
97
92
86
91
86
78
68
47
44
28
23
35

Low Clouds (% Sky Obscured)

69
74
82
91
84
80
75
69
64
71
78
74
74
15
25
55
50
32
21
14
2
0
9
17

Medium Clouds (% Sky Obscured)

80
62
63
54
55
14
14
19
20
24
70
72
71
43
50
55
51
48
40
26
20
13
15
19

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)

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

Precipitation Type

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

Precipitation Probability (%)

25
45
54
51
45
27
27
28
25
7
20
20
19
25
25
26
26
29
33
31
24
5
8
7

Precipitation Amount (mm)

0
0.1
0.2
0.2
0.2
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
5
5
4
4
4
5
6
6
7
9
9
9
9
8
8
8
9
9
9

Chance of Frost

Temperature (°C)

-8
-9
-8
-8
-8
-8
-9
-10
-10
-9
-9
-8
-8
-8
-10
-11
-12
-14
-15
-15
-15
-15
-15
-16

Feels Like (°C)

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

Dew Point (°C)

-9
-9
-9
-9
-9
-9
-10
-11
-10
-10
-10
-10
-10
-9
-11
-12
-13
-14
-16
-16
-16
-17
-17
-18

Relative Humidity (%)

92
94
92
94
94
94
92
94
94
92
90
90
88
90
90
92
92
94
93
93
90
84
82
81

Pressure (mb)

1014
1014
1015
1015
1015
1015
1015
1015
1015
1015
1015
1015
1014
1014
1014
1015
1015
1016
1017
1018
1019
1020
1021
1021

Ozone (du)

362
363
365
365
364
365
368
375
386
388
389
394
394
389
385
381
378
373
368
363
358
353
348
343

Monday 15

Waning Crescent 17%

03:19

13:12

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

Sun - Rise: 07:28, Set: 16:11, Transit: 11:49. Moon - Rise: 03:19, Set: 13:12. Civil Dark: 16:45 - 06:54. Nautical Dark: 17:23 - 06:16. Astro Dark: 17:59 - 05:40

Total Clouds (% Sky Obscured)

46
41
29
22
25
25
20
24
24
26
32
36
36
30
40
41
36
35
30
54
79
91
85
75

Low Clouds (% Sky Obscured)

26
17
9
0
0
0
1
19
24
26
32
36
36
30
40
41
36
21
2
13
24
33
46
60

Medium Clouds (% Sky Obscured)

23
18
14
12
15
15
10
5
4
3
5
6
8
11
18
22
20
19
22
45
67
81
60
41

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
7
15
22
30
40
41
36
35
30
29
16
1
14
22

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
7

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 (%)

3
5
5
1
2
2
0
1
1
0
3
2
0
1
0
0
1
0
0
1
3
4
8
11

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
9
9
9
9
9
9
10
10
11
11
11
11
11
10
9
9
8
7
7
6
6
5

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-20
-21
-21
-20
-20
-19
-19
-18
-20
-19
-19
-19
-18
-18
-16
-16
-16
-17
-17
-17
-18
-18
-18
-17

Dew Point (°C)

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

Relative Humidity (%)

81
80
79
80
80
82
81
80
81
80
79
81
81
81
81
83
81
81
81
84
83
83
84
86

Pressure (mb)

1022
1023
1023
1024
1025
1026
1026
1027
1028
1028
1029
1028
1028
1027
1027
1027
1027
1027
1027
1027
1027
1026
1026
1026

Ozone (du)

339
334
339
344
349
346
343
340
340
340
340
329
318
308
305
303
301
303
306
309
311
313
315
315

Tuesday 16

Waning Crescent 11%

04:25

13:35

Sun - Rise: 07:28, Set: 16:11, Transit: 11:50. Moon - Rise: 04:25, Set: 13:35. Civil Dark: 16:46 - 06:54. Nautical Dark: 17:23 - 06:17. Astro Dark: 17:59 - 05:41

Total Clouds (% Sky Obscured)

Low Clouds (% Sky Obscured)

Medium Clouds (% Sky Obscured)

High Clouds (% Sky Obscured)

ISS Passover

Visibility (miles)

Fog (%)

Precipitation Type

Precipitation Probability (%)

Precipitation Amount (mm)

Wind Speed/Direction (mph)

Chance of Frost

Temperature (°C)

Feels Like (°C)

Dew Point (°C)

Relative Humidity (%)

Pressure (mb)

Ozone (du)

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

Generated: 10/12/25 00:23:38. Forecast: 10/12/25 to 16/12/25. Timezone: UTC-5.00