Clear Outside v1.0 - International Weather Forecasts For Astronomers

Sunday 31

Full Moon 100%

21:33

04:44

00 OK
01 OK
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: 05:08, Set: 20:35, Transit: 12:52. Moon - Rise: 21:33, Set: 04:44. Civil Dark: 21:12 - 04:32. Nautical Dark: 22:00 - 03:43. Astro Dark: 23:02 - 02:41

Total Clouds (% Sky Obscured)

31
47
59
68
100
100
100
100
100
100
100
100
98
59
73
82
99
58
78
100
100
94
79
69

Low Clouds (% Sky Obscured)

0
0
4
5
1
4
5
10
10
51
41
28
20
37
62
70
62
51
50
30
44
37
51
1

Medium Clouds (% Sky Obscured)

31
47
59
68
100
91
100
100
100
100
100
100
96
44
29
82
2
40
78
100
100
87
55
64

High Clouds (% Sky Obscured)

31
47
59
68
100
100
100
100
100
100
100
100
28
25
6
80
80
5
78
75
70
6
6
41

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
5
4
5
4
4
9
9
9
9
9
3
3
4
6
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
Very Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
None
None
Light Rain
Light Rain
Very Light Rain
Light Rain
Very Light Rain
None
None
Very Light Rain
None

Precipitation Probability (%)

0
0
0
0
0
0
22
52
77
95
95
94
72
57
55
78
82
83
95
77
48
24
39
8

Precipitation Amount (mm)

0
0
0
0
0
0
0
0.3
0.6
0.9
1
0.9
0.4
0
0
0.5
0.5
0.3
2
0.3
0
0
0.3
0

Wind Speed/Direction (mph)

5
5
6
6
9
9
7
8
4
8
8
8
9
10
12
13
12
11
9
10
6
5
5
5

Chance of Frost

Temperature (°C)

13
13
12
11
11
11
11
12
12
12
12
13
13
14
16
17
16
16
16
14
14
13
13
12

Feels Like (°C)

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

Dew Point (°C)

9
9
7
7
7
7
8
8
10
11
12
12
12
11
11
9
6
7
7
10
11
12
11
11

Relative Humidity (%)

77
76
75
76
75
76
79
80
87
95
95
93
90
83
73
58
50
55
56
74
82
89
90
92

Pressure (mb)

1018
1017
1017
1016
1015
1015
1015
1015
1015
1015
1015
1014
1014
1013
1012
1011
1010
1010
1010
1011
1011
1012
1012
1012

Ozone (du)

392
392
391
392
393
394
396
394
395
395
396
397
398
403
409
412
415
416
415
417
420
422
421
421

Monday 1

Waning Gibbous 99%

22:25

05:28

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

Sun - Rise: 05:08, Set: 20:36, Transit: 12:52. Moon - Rise: 22:25, Set: 05:28. Civil Dark: 21:13 - 04:31. Nautical Dark: 22:01 - 03:42. Astro Dark: 23:04 - 02:39

Total Clouds (% Sky Obscured)

53
52
59
67
77
53
79
23
24
22
17
11
8
15
9
5
3
12
21
6
49
39
22
26

Low Clouds (% Sky Obscured)

30
32
43
53
59
48
41
23
24
22
17
11
6
15
8
3
1
0
20
1
8
1
1
23

Medium Clouds (% Sky Obscured)

26
23
3
2
1
0
41
2
2
2
4
0
0
2
0
0
0
12
21
6
15
21
22
26

High Clouds (% Sky Obscured)

5
2
2
0
0
0
30
3
2
0
1
3
3
4
4
4
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 (%)

4
0
0
0
1
0
0
0
0
0
1
0
0
0
1
2
2
2
8
12
5
13
0
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
7
7
8
7
7
7
8
8
7
7
7
7
6
5
4
3
3
1
3
4
2
1
3

Chance of Frost

Temperature (°C)

12
11
11
11
11
10
10
11
12
13
15
16
18
19
19
20
20
20
20
20
19
18
17
17

Feels Like (°C)

10
9
8
8
8
8
8
8
10
12
14
15
16
17
19
20
20
21
22
21
20
17
18
17

Dew Point (°C)

11
11
10
10
10
10
9
9
9
8
8
7
6
6
6
6
6
7
8
11
12
12
12
12

Relative Humidity (%)

95
96
96
95
95
95
95
90
83
72
62
53
46
43
42
40
40
41
43
54
61
66
72
74

Pressure (mb)

1013
1013
1013
1014
1015
1015
1016
1017
1018
1018
1019
1019
1019
1019
1019
1019
1018
1019
1018
1019
1019
1020
1020
1020

Ozone (du)

420
417
413
412
414
414
415
412
406
403
402
401
400
399
400
401
402
403
404
405
404
403
406
405

Tuesday 2

Waning Gibbous 97%

23:08

06:21

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

Sun - Rise: 05:07, Set: 20:37, Transit: 12:52. Moon - Rise: 23:08, Set: 06:21. Civil Dark: 21:14 - 04:30. Nautical Dark: 22:02 - 03:41. Astro Dark: 23:06 - 02:38

Total Clouds (% Sky Obscured)

25
27
61
70
75
65
95
69
48
58
52
54
55
73
71
77
41
58
96
82
80
78
78
77

Low Clouds (% Sky Obscured)

25
1
1
1
0
0
0
0
0
0
0
0
0
0
30
21
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

18
22
25
34
44
51
19
25
25
38
42
29
22
40
17
5
12
18
1
1
1
0
0
19

High Clouds (% Sky Obscured)

0
7
61
70
75
65
88
69
48
58
47
38
38
30
52
71
41
50
94
82
80
78
76
67

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 (%)

2
2
1
0
0
0
0
0
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)

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

Chance of Frost

Temperature (°C)

16
15
14
13
13
13
13
13
15
16
17
18
19
21
21
22
22
22
22
21
20
18
17
16

Feels Like (°C)

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

Dew Point (°C)

13
12
11
10
10
10
10
10
9
8
7
6
6
6
5
5
4
5
7
10
11
11
10
10

Relative Humidity (%)

79
82
82
80
81
83
83
78
67
57
49
45
41
38
35
33
31
31
39
51
57
63
64
68

Pressure (mb)

1020
1020
1020
1020
1021
1021
1021
1021
1022
1022
1023
1023
1023
1023
1022
1022
1022
1022
1022
1022
1023
1023
1023
1023

Ozone (du)

405
401
394
389
385
381
377
374
371
366
362
359
357
354
352
350
349
348
347
347
347
347
347
347

Wednesday 3

Waning Gibbous 92%

23:43

07:22

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

Sun - Rise: 05:07, Set: 20:37, Transit: 12:52. Moon - Rise: 23:43, Set: 07:22. Civil Dark: 21:14 - 04:30. Nautical Dark: 22:04 - 03:41. Astro Dark: 23:07 - 02:37

Total Clouds (% Sky Obscured)

64
75
74
74
76
65
59
50
29
20
5
3
3
3
3
0
4
3
2
5
15
40
59
30

Low 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

Medium Clouds (% Sky Obscured)

36
57
52
50
45
40
35
27
18
8
0
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

52
53
39
25
9
5
5
3
0
0
0
0
0
0
1
0
1
1
1
1
15
35
52
30

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
0
0
0
0
0
0
0
0
0
0
0
0
1
1
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)

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

Chance of Frost

Temperature (°C)

15
15
15
14
14
14
14
15
16
18
20
21
23
24
25
25
25
25
24
24
22
21
19
18

Feels Like (°C)

15
16
15
15
14
13
14
14
15
18
19
21
23
24
25
25
25
26
25
24
23
22
20
19

Dew Point (°C)

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

Relative Humidity (%)

73
74
73
74
76
76
75
70
63
59
54
50
47
43
42
42
42
46
51
59
67
73
75
76

Pressure (mb)

1023
1023
1023
1023
1023
1024
1024
1025
1025
1025
1025
1025
1025
1024
1023
1023
1022
1022
1022
1021
1021
1021
1021
1021

Ozone (du)

348
347
346
346
347
347
347
347
347
347
347
347
348
349
350
351
350
350
349
349
351
352
352
352

Thursday 4

Waning Gibbous 86%

No Rise

08:27

00 Good
01 Good
02 OK
03 OK
04 OK
05 OK
06 Good
07 Good
08 Good
09 Good
10 Good
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

Sun - Rise: 05:06, Set: 20:38, Transit: 12:52. Moon - Rise: No Rise, Set: 08:27. Civil Dark: 21:15 - 04:29. Nautical Dark: 22:05 - 03:40. Astro Dark: 23:09 - 02:36

Total Clouds (% Sky Obscured)

18
4
25
43
47
46
17
7
12
5
6
41
87
85
98
92
90
93
96
100
100
100
100
96

Low 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

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
10
18
27
32
35
41
59
70
84
87

High Clouds (% Sky Obscured)

17
0
25
43
47
46
17
2
3
1
2
11
29
30
71
57
45
64
84
100
100
100
100
90

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
0
0
0
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)

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

Chance of Frost

Temperature (°C)

18
17
17
16
16
15
15
16
17
19
21
22
24
25
26
26
27
27
26
25
24
22
21
20

Feels Like (°C)

18
18
17
16
16
15
15
17
17
19
20
22
23
24
25
25
26
26
26
26
26
21
21
21

Dew Point (°C)

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

Relative Humidity (%)

77
77
79
81
80
79
78
72
65
61
61
57
55
52
53
53
54
55
58
63
67
68
69
70

Pressure (mb)

1021
1021
1021
1021
1021
1021
1021
1021
1021
1021
1020
1020
1019
1018
1017
1015
1014
1013
1013
1013
1012
1012
1012
1012

Ozone (du)

352
351
350
350
349
349
349
350
349
347
346
342
342
342
342
343
345
346
346
345
345
343
342
341

Friday 5

Waning Gibbous 79%

00:11

09:35

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 OK
21 OK
22 Good
23 Good

Sun - Rise: 05:06, Set: 20:39, Transit: 12:52. Moon - Rise: 00:11, Set: 09:35. Civil Dark: 21:16 - 04:29. Nautical Dark: 22:06 - 03:39. Astro Dark: 23:11 - 02:34

Total Clouds (% Sky Obscured)

92
88
93
97
100
100
100
100
100
100
100
92
83
80
86
69
65
48
29
13
8
3
1
1

Low Clouds (% Sky Obscured)

0
0
14
27
41
37
33
32
44
52
56
50
32
5
0
0
0
0
1
1
1
0
0
0

Medium Clouds (% Sky Obscured)

86
88
89
92
95
95
96
97
85
72
59
59
62
62
50
37
26
21
16
10
7
3
0
0

High Clouds (% Sky Obscured)

75
62
75
88
99
100
100
100
97
97
95
67
33
0
0
0
0
0
0
0
0
0
0
0

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
7
5
3
5
7
9
8
6
4
6
8
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
Very Light Rain
Very Light Rain
Very Light Rain
None
None
None
None
None

Precipitation Probability (%)

0
0
1
3
3
29
40
47
45
40
38
39
38
40
44
48
58
62
58
52
39
27
3
3

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

69
69
69
71
72
74
80
86
93
93
93
93
92
92
90
88
85
82
84
85
86
83
79
76

Pressure (mb)

1012
1012
1012
1012
1013
1013
1014
1014
1015
1014
1014
1014
1014
1013
1013
1013
1012
1012
1012
1013
1013
1014
1015
1015

Ozone (du)

339
338
337
338
340
342
346
350
354
356
358
360
358
355
353
354
354
354
357
359
361
361
360
360

Saturday 6

Waning Gibbous 70%

00:34

10:44

Sun - Rise: 05:06, Set: 20:40, Transit: 12:53. Moon - Rise: 00:34, Set: 10:44. Civil Dark: 21:17 - 04:28. Nautical Dark: 22:07 - 03:39. Astro Dark: 23:12 - 02:33

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: 31/05/26 00:46:59. Forecast: 31/05/26 to 06/06/26. Timezone: UTC-4.00