Clear Outside v1.0 - International Weather Forecasts For Astronomers

Thursday 4

Full Moon 100%

16:39

08:39

22 OK
23 OK
00 OK
01 Bad
02 Bad
03 OK
04 OK
05 OK
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

Sun - Rise: 07:27, Set: 16:19, Transit: 11:53. Moon - Rise: 16:39, Set: 08:39. Civil Dark: 16:53 - 06:54. Nautical Dark: 17:30 - 06:16. Astro Dark: 18:06 - 05:41

Total Clouds (% Sky Obscured)

1
2
4
32
29
14
13
13
36
75
99
100
98
99
99
95
98
100
100
98
98
95
95
99

Low Clouds (% Sky Obscured)

0
0
0
1
2
1
0
0
1
1
1
9
65
77
18
10
10
42
31
66
46
55
75
77

Medium Clouds (% Sky Obscured)

1
2
2
25
21
7
2
2
35
75
99
100
94
95
97
91
98
99
98
86
51
52
65
79

High Clouds (% Sky Obscured)

1
2
4
6
4
4
7
5
4
20
76
9
55
55
6
3
6
5
5
5
9
25
39
43

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
5
5
4
2
3
7
7
8
7
7
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
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
5
15
15
7
14
6
1
0
0
1
6

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

Chance of Frost

Temperature (°C)

-18
-18
-18
-16
-16
-16
-16
-16
-15
-15
-15
-14
-12
-10
-9
-8
-8
-7
-8
-8
-8
-8
-9
-9

Feels Like (°C)

-21
-21
-20
-18
-18
-18
-18
-18
-18
-18
-18
-19
-17
-16
-15
-13
-13
-13
-13
-13
-12
-12
-12
-13

Dew Point (°C)

-22
-22
-21
-19
-19
-19
-19
-18
-19
-18
-18
-18
-16
-13
-12
-11
-10
-10
-10
-10
-10
-10
-10
-10

Relative Humidity (%)

70
73
77
78
78
79
79
79
76
75
74
70
72
78
78
78
82
83
82
85
87
88
90
92

Pressure (mb)

1028
1028
1028
1027
1027
1026
1025
1025
1025
1024
1024
1023
1022
1021
1020
1018
1017
1016
1016
1015
1015
1015
1014
1014

Ozone (du)

383
379
375
371
366
364
362
367
364
365
362
360
359
358
359
359
365
369
362
354
352
350
353
354

Friday 5

Waning Gibbous 97%

17:53

09:44

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 OK
21 Bad

Sun - Rise: 07:28, Set: 16:19, Transit: 11:54. Moon - Rise: 17:53, Set: 09:44. Civil Dark: 16:53 - 06:55. Nautical Dark: 17:30 - 06:17. Astro Dark: 18:06 - 05:41

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
99
99
99
97
97
96
87
94
93
74
50
40
40

Low Clouds (% Sky Obscured)

80
88
95
92
97
97
95
92
90
92
96
90
86
85
88
85
82
83
94
81
44
10
10
10

Medium Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
98
96
90
36
50
39
40
55
61
18
2
1
0

High Clouds (% Sky Obscured)

100
100
100
100
81
18
18
0
0
0
0
0
0
0
0
0
0
1
1
3
4
0
0
0

ISS Passover

Visibility (miles)

3
3
3
3
3
1
1
0
0
0
0
0
0
0
1
0
0
6
9
9
1
0
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
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
None
None
Snow
Snow
None
None
None

Precipitation Probability (%)

17
28
44
56
61
60
57
68
69
61
57
69
63
58
55
50
43
30
32
40
36
19
3
1

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

-9
-8
-8
-8
-7
-7
-6
-6
-5
-5
-4
-4
-3
-2
-1
-0
0
1
-0
-1
-1
-3
-4
-6

Feels Like (°C)

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

Dew Point (°C)

-10
-9
-9
-9
-8
-8
-7
-7
-6
-6
-5
-4
-4
-2
-2
-1
-0
-1
-2
-3
-2
-3
-7
-8

Relative Humidity (%)

92
92
94
92
94
94
94
92
94
94
94
94
94
94
92
98
98
88
86
86
92
96
82
85

Pressure (mb)

1013
1013
1012
1011
1011
1010
1010
1009
1008
1008
1007
1007
1007
1006
1006
1005
1005
1005
1006
1007
1008
1010
1012
1013

Ozone (du)

355
350
346
349
357
366
371
384
387
383
387
384
373
362
357
356
352
349
349
350
353
354
356
357

Saturday 6

Waning Gibbous 92%

19:14

10:32

22 OK
23 OK
00 OK
01 Good
02 Good
03 Good
04 Good
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

Sun - Rise: 07:29, Set: 16:19, Transit: 11:54. Moon - Rise: 19:14, Set: 10:32. Civil Dark: 16:53 - 06:55. Nautical Dark: 17:30 - 06:18. Astro Dark: 18:06 - 05:42

Total Clouds (% Sky Obscured)

40
35
30
5
3
6
11
51
37
82
100
100
100
100
100
100
100
98
97
99
97
96
94
92

Low Clouds (% Sky Obscured)

5
10
8
2
1
1
2
1
1
1
1
1
38
55
55
83
88
91
91
94
93
89
83
78

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
2
27
37
65
76
84
98
100
100
100
99
90
91
96
93
90
88
86

High Clouds (% Sky Obscured)

0
0
0
0
0
3
9
34
4
47
76
100
100
55
60
60
60
60
65
60
45
25
25
25

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
2
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
Snow
Snow
Snow
Snow

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
7
18
31
33
33
34
45
49
50
52

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

78
78
80
80
79
81
82
80
80
80
78
75
71
69
65
65
63
66
72
76
81
88
88
88

Pressure (mb)

1015
1016
1017
1018
1020
1020
1021
1021
1022
1022
1022
1023
1023
1023
1022
1021
1020
1020
1020
1020
1020
1020
1019
1019

Ozone (du)

354
353
352
355
356
354
354
352
350
350
352
356
365
364
363
367
372
369
374
385
395
390
386
390

Sunday 7

Waning Gibbous 84%

20:34

11:07

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

Sun - Rise: 07:30, Set: 16:19, Transit: 11:55. Moon - Rise: 20:34, Set: 11:07. Civil Dark: 16:53 - 06:56. Nautical Dark: 17:30 - 06:19. Astro Dark: 18:06 - 05:43

Total Clouds (% Sky Obscured)

77
63
44
36
38
44
41
7
15
14
3
4
3
28
43
43
44
4
3
10
55
61
72
84

Low Clouds (% Sky Obscured)

60
43
25
29
36
43
10
5
13
12
2
4
2
28
43
43
44
3
3
5
5
2
4
22

Medium Clouds (% Sky Obscured)

67
45
25
19
17
15
20
1
0
0
0
0
0
0
0
0
0
0
0
2
55
58
65
84

High Clouds (% Sky Obscured)

15
10
15
20
30
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2
3
7

ISS Passover

Visibility (miles)

0
0
0
4
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

Snow
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 (%)

53
41
26
13
7
2
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Amount (mm)

0.2
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
5
6
6
7
7
7
8
8
8
7
7
8
8
8
7
7
6
5
4
3
3
2
2

Chance of Frost

Temperature (°C)

-12
-12
-13
-13
-14
-14
-15
-15
-15
-15
-15
-15
-14
-13
-12
-11
-11
-11
-12
-14
-14
-15
-15
-15

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

88
88
88
83
78
71
73
73
76
76
76
74
70
70
67
67
67
72
75
81
84
84
84
86

Pressure (mb)

1019
1019
1020
1020
1020
1021
1022
1022
1023
1024
1025
1026
1026
1026
1026
1025
1025
1025
1025
1026
1026
1026
1025
1025

Ozone (du)

402
408
404
406
414
423
426
428
436
433
431
421
409
396
380
378
376
375
382
381
392
409
421
422

Monday 8

Waning Gibbous 75%

21:51

11:33

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
21 Bad

Sun - Rise: 07:31, Set: 16:19, Transit: 11:55. Moon - Rise: 21:51, Set: 11:33. Civil Dark: 16:53 - 06:57. Nautical Dark: 17:30 - 06:20. Astro Dark: 18:06 - 05:44

Total Clouds (% Sky Obscured)

78
67
66
53
27
27
43
75
79
90
95
100
100
100
100
100
100
100
100
100
99
99
100
100

Low Clouds (% Sky Obscured)

27
21
17
2
1
3
4
9
8
10
10
15
24
44
62
73
84
95
95
94
94
91
88
85

Medium Clouds (% Sky Obscured)

74
62
59
49
17
12
15
14
18
24
27
30
100
100
100
86
76
66
80
85
90
93
97
99

High Clouds (% Sky Obscured)

4
3
2
2
0
0
1
2
3
11
38
41
58
75
88
93
86
90
65
44
34
45
57
64

ISS Passover

Visibility (miles)

9
9
9
8
9
7
6
6
8
2
0
0
1
9
2
0
0
0
0
0
0
0
1
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
None
None
None
None
None
Snow
None
None
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
16
27
35
9
26
46
52
59
66
65
65
63
69
73
74

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

-15
-15
-16
-15
-16
-16
-16
-16
-15
-16
-14
-12
-10
-10
-9
-8
-6
-6
-6
-6
-6
-6
-6
-5

Feels Like (°C)

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

Dew Point (°C)

-17
-17
-17
-17
-17
-18
-18
-18
-17
-17
-16
-14
-12
-12
-12
-10
-8
-8
-7
-7
-7
-7
-7
-7

Relative Humidity (%)

86
84
85
82
85
86
86
86
84
88
90
88
86
80
80
87
90
90
92
92
92
92
90
89

Pressure (mb)

1025
1025
1024
1024
1023
1023
1022
1022
1022
1021
1021
1020
1019
1018
1016
1015
1012
1011
1010
1010
1009
1009
1008
1007

Ozone (du)

425
429
430
429
433
432
428
425
423
421
421
424
428
429
426
416
405
395
385
375
366
357
354
351

Tuesday 9

Waning Gibbous 65%

No Rise

11:54

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
21 Bad

Sun - Rise: 07:32, Set: 16:19, Transit: 11:56. Moon - Rise: No Rise, Set: 11:54. Civil Dark: 16:53 - 06:58. Nautical Dark: 17:30 - 06:21. Astro Dark: 18:06 - 05:45

Total Clouds (% Sky Obscured)

96
93
90
92
95
98
99
99
100
100
100
99
100
100
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

83
81
80
76
74
71
74
77
80
83
87
91
91
91
92
95
97
99
96
95
93
92
92
92

Medium Clouds (% Sky Obscured)

87
77
65
76
86
95
97
99
100
99
99
99
99
99
100
100
100
100
100
100
100
100
100
100

High Clouds (% Sky Obscured)

96
93
55
42
47
60
47
30
16
24
33
37
56
77
100
100
100
100
100
100
100
100
100
100

ISS Passover

Visibility (miles)

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

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

Precipitation Probability (%)

68
62
51
44
37
24
25
22
20
27
33
37
44
50
56
66
73
78
85
92
94
92
89
84

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

-5
-5
-4
-4
-4
-4
-4
-5
-4
-4
-4
-3
-2
-2
-1
0
0
0
0
0
0
0
0
0

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

87
87
89
89
85
82
81
79
79
78
79
79
81
78
77
75
74
73
71
78
86
94
96
96

Pressure (mb)

1007
1006
1006
1006
1005
1005
1005
1005
1004
1004
1004
1003
1003
1002
1001
1000
999
998
998
997
997
996
995
995

Ozone (du)

349
347
346
345
341
337
334
331
327
324
324
325
325
324
324
323
322
321
319
319
319
319
321
323

Wednesday 10

Waning Gibbous 54%

23:03

12:12

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: 07:33, Set: 16:19, Transit: 11:56. Moon - Rise: 23:03, Set: 12:12. Civil Dark: 16:53 - 06:59. Nautical Dark: 17:31 - 06:22. Astro Dark: 18:07 - 05:46

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
99
98
97
73
52
35
40
40
35
30
25
25

Low Clouds (% Sky Obscured)

93
95
96
97
98
97
97
96
96
89
79
72
57
51
35
40
40
35
30
25
25

Medium Clouds (% Sky Obscured)

100
100
100
100
100
100
88
81
71
81
88
97
73
52
35
40
40
35
30
25
25

High Clouds (% Sky Obscured)

100
100
100
80
42
3
2
2
1
7
27
70
73
52
35
40
27
2
16
25
25

ISS Passover

Visibility (miles)

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

Fog (%)

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
Light Rain
Light Rain
Light Rain
Light Rain
Very Light Rain
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

83
87
86
82
79
74
63
54
39
36
31
25
30
30
28
29
27
27
24
20
10

Precipitation Amount (mm)

0.5
0.5
0.5
0.4
0.4
0.4
0.3
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-5
-5
-5
-5
-4
-4
-4
-4
-4
-5
-6
-5
-5
-5
-4
-4
-5
-6
-5
-6
-6

Dew Point (°C)

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

Relative Humidity (%)

98
98
98
98
100
98
98
100
100
98
98
100
98
98
98
98
94
89
87
85
82

Pressure (mb)

994
993
993
992
992
992
992
992
993
993
994
996
997
997
998
999
1001
1002
1004
1005
1007

Ozone (du)

325
325
326
326
333
340
347
348
349
350
350
350
350
343
335
327
325
324
322
317
313

Forecast for ByWard Market, Ottawa, Canada (45.42,-75.69)

Generated: 04/12/25 21:47:16. Forecast: 04/12/25 to 10/12/25. Timezone: UTC-5.00