Clear Outside v1.0 - International Weather Forecasts For Astronomers

Thursday 18

Waning Crescent 0%

07:58

15:54

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
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad

Sun - Rise: 07:52, Set: 16:39, Transit: 12:15. Moon - Rise: 07:58, Set: 15:54. Civil Dark: 17:12 - 07:18. Nautical Dark: 17:49 - 06:41. Astro Dark: 18:25 - 06:05

Total Clouds (% Sky Obscured)

94
89
100
100
100
100
100
100
100
100
100
100
100
100
100
100
97
94
97
100
95
100
100
100

Low Clouds (% Sky Obscured)

0
28
87
75
44
76
93
100
99
100
100
96
100
93
100
84
93
84
88
100
87
100
100
100

Medium Clouds (% Sky Obscured)

51
89
100
100
100
100
100
100
100
100
100
100
100
100
100
100
92
48
57
62
69
84
73
59

High Clouds (% Sky Obscured)

94
89
100
100
100
100
100
100
100
100
100
100
100
100
100
95
95
0
0
0
0
0
0
0

ISS Passover

Visibility (miles)

9
9
9
9
9
8
7
6
2
0
0
0
0
0
0
0
1
4
4
0
0
1
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
Very Light Rain
None
None
Very Light Rain
None
Light Rain
Light Rain
Light Rain
Very Light Rain
Light Rain
Light Rain
Moderate Rain
Light Rain
Light Rain
Snow
None
None
Snow
Snow
Snow
Snow
Snow
Snow

Precipitation Probability (%)

10
58
36
36
64
66
95
95
91
83
95
95
95
95
95
70
51
24
56
74
73
72
74
70

Precipitation Amount (mm)

0
0.2
0
0
0.2
0
0.7
1
0.5
0.3
0.9
1.9
2.6
1.5
0.9
0.3
0
0
0.2
0.6
0.5
0.5
0.6
0.4

Wind Speed/Direction (mph)

13
14
14
16
16
17
17
17
17
15
16
14
12
10
10
10
13
16
15
14
14
16
16
14

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

88
88
94
91
91
94
100
100
100
100
98
100
100
100
98
98
88
84
81
91
94
86
91
92

Pressure (mb)

1004
1003
1002
1001
1000
998
995
994
992
992
990
988
988
989
990
990
991
991
992
991
991
992
993
995

Ozone (du)

313
314
311
310
311
311
312
314
316
314
316
320
322
327
330
339
342
349
358
370
372
373
375
383

Friday 19

New Moon 1%

08:49

16:51

17 Bad
18 Bad
19 Bad
20 Bad
21 OK
22 Good
23 Good
00 Good
01 OK
02 OK
03 OK
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

Sun - Rise: 07:52, Set: 16:39, Transit: 12:16. Moon - Rise: 08:49, Set: 16:51. Civil Dark: 17:12 - 07:19. Nautical Dark: 17:49 - 06:42. Astro Dark: 18:25 - 06:06

Total Clouds (% Sky Obscured)

95
92
81
65
31
5
2
6
27
30
44
41
54
99
98
75
100
100
100
100
99
100
100
99

Low Clouds (% Sky Obscured)

87
83
70
37
22
0
0
0
0
0
0
30
39
29
34
36
49
100
74
71
71
52
88
87

Medium Clouds (% Sky Obscured)

82
18
4
3
0
0
0
3
22
23
42
28
51
95
94
73
100
89
100
100
95
100
100
96

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
3
0
1
5
95
86
55
56
100
100
97
38
78
100
70

ISS Passover

Visibility (miles)

0
0
2
6
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
2
1
2
2
0

Fog (%)

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

Precipitation Probability (%)

55
39
33
13
6
4
3
2
2
4
1
0
0
0
0
0
0
49
46
45
50
47
81
95

Precipitation Amount (mm)

0.2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.3
0
0.2
0.3
0.2
0.6
1.3

Wind Speed/Direction (mph)

19
16
17
16
15
15
13
11
9
6
4
3
3
4
5
6
8
9
11
13
14
15
16
15

Chance of Frost

Temperature (°C)

-6
-8
-9
-10
-10
-11
-11
-11
-11
-10
-11
-11
-11
-12
-11
-11
-10
-7
-6
-5
-4
-3
-2
-2

Feels Like (°C)

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

Dew Point (°C)

-7
-10
-12
-13
-14
-14
-15
-14
-14
-13
-13
-13
-14
-14
-14
-13
-12
-9
-8
-7
-5
-4
-4
-3

Relative Humidity (%)

89
87
81
80
77
73
72
73
76
78
83
86
83
85
83
85
85
87
85
84
89
87
86
94

Pressure (mb)

997
1001
1004
1006
1008
1011
1013
1014
1016
1017
1018
1019
1019
1019
1018
1018
1017
1016
1014
1012
1009
1007
1006
1005

Ozone (du)

394
403
412
393
388
384
379
376
371
371
369
368
361
351
346
341
341
340
336
333
331
330
331
328

Saturday 20

Waxing Crescent 3%

09:32

No Set

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
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad

Sun - Rise: 07:53, Set: 16:39, Transit: 12:16. Moon - Rise: 09:32, Set: No Set. Civil Dark: 17:13 - 07:19. Nautical Dark: 17:50 - 06:42. Astro Dark: 18:26 - 06:06

Total Clouds (% Sky Obscured)

96
91
93
91
86
84
97
94
97
100
100
100
100
65
84
100
100
90
92
91
77
65
50
38

Low Clouds (% Sky Obscured)

83
82
82
79
68
63
88
86
91
100
100
100
100
40
76
100
100
90
92
91
77
65
50
38

Medium Clouds (% Sky Obscured)

86
55
54
55
55
0
21
0
15
40
35
24
35
0
0
40
23
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

70
70
65
63
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

ISS Passover

Visibility (miles)

0
3
0
0
0
0
0
9
9
0
9
2
1
0
1
0
4
2
1
2
1
4
4
4

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

Precipitation Probability (%)

68
95
92
67
58
49
39
40
46
65
68
52
60
55
56
67
62
53
38
30
18
26
25
19

Precipitation Amount (mm)

0.3
1
0.8
0.4
0.4
0.2
0
0.2
0
0.4
0.4
0.2
0.6
0.4
0.4
0.5
0.4
0.2
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-8
-7
-6
-6
-6
-6
-5
-6
-7
-10
-13
-14
-13
-13
-13
-14
-13
-13
-12
-13
-13
-13
-14
-15

Dew Point (°C)

-3
-4
-2
-1
-1
-1
-1
-4
-4
-4
-10
-10
-9
-8
-10
-10
-10
-9
-8
-8
-9
-10
-11
-12

Relative Humidity (%)

94
86
96
98
98
96
96
74
75
89
65
74
80
89
80
83
79
84
82
82
84
83
83
83

Pressure (mb)

1004
1003
1003
1003
1002
1002
1002
1003
1003
1004
1006
1007
1008
1010
1011
1012
1013
1014
1015
1016
1017
1019
1021
1023

Ozone (du)

330
333
338
342
347
352
365
366
365
366
366
366
366
369
370
369
370
377
386
389
376
365
361
361

Sunday 21

Waxing Crescent 7%

10:06

17:54

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

Sun - Rise: 07:53, Set: 16:40, Transit: 12:17. Moon - Rise: 10:06, Set: 17:54. Civil Dark: 17:13 - 07:20. Nautical Dark: 17:50 - 06:42. Astro Dark: 18:26 - 06:07

Total Clouds (% Sky Obscured)

11
7
18
23
29
24
19
27
37
50
61
66
70
73
73
75
77
89
100
100
100
99
99
99

Low Clouds (% Sky Obscured)

8
5
2
23
29
24
16
25
37
49
61
66
69
71
72
70
65
65
68
83
91
94
95
83

Medium Clouds (% Sky Obscured)

0
2
18
4
2
2
0
0
7
14
22
24
27
29
37
47
52
58
61
100
85
65
67
55

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
15
30
30
30
25
25
42

ISS Passover

Visibility (miles)

8
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
5
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
Snow
Snow
Snow
Snow
Snow
Snow

Precipitation Probability (%)

19
5
4
4
3
6
6
2
5
5
5
10
14
19
24
26
25
31
37
46
51
54
57
49

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

-10
-11
-11
-12
-12
-12
-12
-13
-13
-13
-14
-14
-14
-14
-14
-13
-12
-10
-8
-7
-6
-5
-5
-5

Feels Like (°C)

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

Dew Point (°C)

-13
-14
-14
-14
-14
-14
-15
-15
-15
-15
-15
-16
-16
-16
-16
-16
-14
-13
-11
-9
-8
-7
-7
-6

Relative Humidity (%)

78
78
78
80
81
83
83
84
84
84
86
84
83
83
83
81
83
80
82
83
85
85
87
90

Pressure (mb)

1024
1026
1028
1029
1030
1031
1032
1032
1033
1034
1035
1035
1035
1036
1036
1036
1036
1035
1035
1034
1033
1032
1032
1031

Ozone (du)

360
359
364
365
361
358
362
366
372
371
368
360
354
350
350
355
357
362
363
358
355
350
343
343

Monday 22

Waxing Crescent 13%

10:33

19:03

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
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad

Sun - Rise: 07:54, Set: 16:41, Transit: 12:17. Moon - Rise: 10:33, Set: 19:03. Civil Dark: 17:14 - 07:20. Nautical Dark: 17:51 - 06:43. Astro Dark: 18:27 - 06:07

Total Clouds (% Sky Obscured)

99
99
93
87
81
86
92
97
98
99
100
100
100
100
100
100
100
100
99
99
95
93
93
97

Low Clouds (% Sky Obscured)

96
96
79
56
51
44
38
30
30
35
40
44
54
66
72
77
84
89
92
95
91
85
78
86

Medium Clouds (% Sky Obscured)

42
30
41
55
68
78
87
96
97
99
100
99
98
98
80
60
35
34
42
40
47
53
60
65

High Clouds (% Sky Obscured)

51
70
49
29
14
34
54
73
83
92
100
80
80
80
75
75
80
79
63
47
63
79
93
97

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
5
1
0
0
0
0
0
0
1
1
2
4
7
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
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
None
None
None
None
None

Precipitation Probability (%)

38
22
19
14
2
3
12
33
68
95
84
73
92
84
77
68
56
47
39
32
30
30
30
28

Precipitation Amount (mm)

0.1
0
0
0
0
0
0
0
0.4
0.9
0.6
0.5
0.8
0.6
0.5
0.5
0.3
0.2
0.1
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-6
-6
-5
-5
-5
-5
-6
-6
-5
-4
-4
-4
-4
-4
-3
-3
-3
-3
-3
-3
-2
-2
-3
-3

Relative Humidity (%)

92
90
92
91
89
89
87
89
92
96
96
94
94
96
96
96
94
92
91
87
86
86
84
84

Pressure (mb)

1031
1030
1030
1029
1028
1027
1026
1026
1025
1023
1022
1020
1019
1018
1018
1017
1017
1017
1016
1016
1016
1015
1015
1015

Ozone (du)

343
340
336
332
328
326
324
322
320
323
322
323
323
321
326
324
323
322
321
321
321
322
324
325

Tuesday 23

Waxing Crescent 21%

10:56

20:14

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
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad

Sun - Rise: 07:54, Set: 16:41, Transit: 12:18. Moon - Rise: 10:56, Set: 20:14. Civil Dark: 17:14 - 07:20. Nautical Dark: 17:51 - 06:43. Astro Dark: 18:27 - 06:08

Total Clouds (% Sky Obscured)

98
100
97
94
89
81
70
67
64
69
83
84
88
85
84
83
82
86
86
89
92
94
97
92

Low Clouds (% Sky Obscured)

93
100
92
83
76
63
50
37
38
38
34
34
38
43
48
47
47
45
47
44
44
48
52
51

Medium Clouds (% Sky Obscured)

75
80
75
70
65
43
33
27
30
36
47
36
30
22
26
30
33
33
35
35
35
36
37
48

High Clouds (% Sky Obscured)

98
100
97
94
89
81
69
50
55
53
57
38
23
8
7
7
6
18
30
39
51
63
74
72

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 (%)

27
26
25
25
23
19
14
7
7
6
5
4
1
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-5
-5
-5
-4
-3
-2
-2
-2
-1
-7
-7
-6
-6
-4
-4
-12
-12
-12
-13
-13
-14
-7
-6
-6

Dew Point (°C)

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

Relative Humidity (%)

83
80
78
80
80
80
81
82
84
82
82
81
80
82
82
80
79
76
74
74
74
77
82
85

Pressure (mb)

1016
1016
1016
1017
1018
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1030
1029
1029
1029
1029
1029

Ozone (du)

325
325
325
325
325
325
325
326
326
325
323
322
319
316
314
313
313
312
315
317
319
317
315
314

Wednesday 24

Waxing Crescent 30%

11:15

21:24

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
10 Bad
11 Bad
12 Bad

Sun - Rise: 07:54, Set: 16:42, Transit: 12:18. Moon - Rise: 11:15, Set: 21:24. Civil Dark: 17:15 - 07:21. Nautical Dark: 17:52 - 06:44. Astro Dark: 18:28 - 06:08

Total Clouds (% Sky Obscured)

92
90
89
90
92
92
95
98
98
98
98
96
93
91
94
97
100
100
100
100

Low Clouds (% Sky Obscured)

45
38
40
44
48
54
59
65
67
72
77
82
87
91
94
96
100
100
100
100

Medium Clouds (% Sky Obscured)

60
70
64
59
54
61
67
73
64
55
46
45
43
37
15
16
21
36
50
63

High Clouds (% Sky Obscured)

74
70
63
71
80
69
55
38
39
42
48
47
40
33
31
29
32
40
66
93

ISS Passover

Visibility (miles)

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

Precipitation Type

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
2
2

Precipitation Amount (mm)

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

Chance of Frost

Temperature (°C)

-6
-6
-7
-7
-7
-8
-8
-7
-7
-7
-7
-7
-7
-7
-7
-6
-5
-3
-3
-2

Feels Like (°C)

-6
-6
-5
-11
-12
-14
-14
-14
-14
-11
-11
-12
-12
-12
-12
-11
-11
-11
-11
-10

Dew Point (°C)

-7
-8
-9
-9
-10
-10
-10
-9
-9
-9
-9
-9
-9
-9
-9
-8
-7
-5
-4
-4

Relative Humidity (%)

87
87
85
85
83
83
85
85
87
87
89
88
90
88
88
87
87
87
87
86

Pressure (mb)

1029
1029
1029
1029
1028
1028
1028
1027
1026
1025
1025
1024
1023
1022
1022
1021
1020
1019
1018
1016

Ozone (du)

312
311
310
310
310
309
309
309
309
310
310
311
308
306
304
301
299
297
293
290

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

Generated: 18/12/25 16:37:57. Forecast: 18/12/25 to 24/12/25. Timezone: UTC-5.00