Clear Outside v1.0 - International Weather Forecasts For Astronomers

Tuesday 23

Waxing Crescent 21%

10:56

20:14

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 OK
08 OK
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad

Sun - Rise: 07:54, Set: 16:41, Transit: 12:18. Moon - Rise: 10:56, Set: 20:14. Civil Dark: 17:15 - 07:20. Nautical Dark: 17:52 - 06:43. Astro Dark: 18:28 - 06:08

Total Clouds (% Sky Obscured)

100
100
100
100
93
100
100
88
82
61
49
47
42
47
56
74
57
70
80
85
91
89
95
95

Low Clouds (% Sky Obscured)

100
100
100
100
92
100
100
88
77
54
49
47
42
47
56
59
34
32
5
0
0
0
0
0

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
2
2
2
2
20
76
83
88
86
94
94

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
6
36
74
57
70
80
85
85
0
4
9

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
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
24
8
18
10
5
1
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)

9
11
11
13
16
16
15
14
13
12
11
10
9
8
8
8
7
5
3
2
2
2
2
2

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

1
-1
-1
-1
-2
-3
-4
-4
-5
-7
-9
-10
-11
-12
-12
-12
-12
-11
-10
-10
-9
-8
-8
-8

Relative Humidity (%)

98
91
91
88
81
80
78
78
81
82
82
82
83
85
85
81
80
80
79
79
80
87
90
90

Pressure (mb)

1012
1013
1013
1013
1014
1015
1016
1018
1020
1021
1023
1024
1026
1027
1028
1029
1029
1029
1028
1027
1027
1027
1027
1027

Ozone (du)

315
317
318
320
325
327
327
323
320
318
318
322
322
322
323
322
323
322
322
320
318
318
317
317

Wednesday 24

Waxing Crescent 30%

11:15

21:24

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 OK
15 OK
16 Bad
17 OK
18 Bad

Sun - Rise: 07:54, Set: 16:42, Transit: 12:18. Moon - Rise: 11:15, Set: 21:24. Civil Dark: 17:16 - 07:21. Nautical Dark: 17:53 - 06:44. Astro Dark: 18:28 - 06:08

Total Clouds (% Sky Obscured)

100
100
99
92
91
100
98
98
89
100
100
99
90
74
91
88
87
87
92
37
43
58
43
54

Low Clouds (% Sky Obscured)

0
38
47
0
0
0
0
5
5
17
97
94
86
74
79
75
72
67
51
37
26
23
3
2

Medium Clouds (% Sky Obscured)

100
99
97
92
91
100
98
96
85
52
44
23
0
3
0
0
0
0
0
0
0
7
43
37

High Clouds (% Sky Obscured)

98
100
96
85
75
80
80
95
33
95
44
95
5
5
70
77
75
70
87
24
31
46
31
25

ISS Passover

Visibility (miles)

9
3
9
9
7
6
6
9
9
9
2
2
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 (%)

8
20
3
2
7
16
3
7
1
3
15
8
5
2
1
3
0
1
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)

1
2
4
3
3
4
3
3
2
3
2
1
4
7
10
11
12
12
11
10
9
7
6
7

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

94
89
89
94
96
94
96
96
96
94
96
94
96
89
89
84
82
81
79
77
77
77
77
78

Pressure (mb)

1026
1025
1024
1023
1022
1021
1020
1019
1019
1017
1017
1017
1017
1017
1019
1020
1021
1022
1022
1023
1025
1026
1027
1028

Ozone (du)

319
319
317
321
322
316
311
309
309
313
323
335
343
349
349
348
344
340
335
330
325
319
317
320

Thursday 25

Waxing Crescent 41%

11:34

22:35

19 OK
20 Bad
21 Bad
22 OK
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

Sun - Rise: 07:55, Set: 16:43, Transit: 12:19. Moon - Rise: 11:34, Set: 22:35. Civil Dark: 17:16 - 07:21. Nautical Dark: 17:53 - 06:44. Astro Dark: 18:29 - 06:08

Total Clouds (% Sky Obscured)

39
74
95
34
50
99
100
98
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

1
2
2
2
2
1
2
0
0
30
52
78
84
69
80
100
86
95
97
98
100
100
100
100

Medium Clouds (% Sky Obscured)

37
28
40
29
31
92
100
97
100
100
100
100
100
100
100
100
100
100
99
98
97
98
99
100

High Clouds (% Sky Obscured)

34
51
74
18
45
93
97
88
100
84
80
100
100
100
100
100
100
100
100
100
100
100
100
100

ISS Passover

Visibility (miles)

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

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
0
0
4
42
51
31
67
75
78
95
95
95
95
91

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0.1
0.1
0
0.2
0.3
0.4
0.7
1.1
1
0.7
0.6

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

78
78
78
78
81
78
78
73
73
72
73
73
73
75
76
75
76
77
75
75
77
82
83
85

Pressure (mb)

1029
1029
1029
1029
1029
1029
1029
1028
1028
1028
1027
1026
1025
1025
1024
1022
1021
1018
1016
1015
1014
1013
1013
1013

Ozone (du)

318
317
319
315
313
311
308
307
303
304
301
307
308
308
308
309
308
307
308
313
316
316
319
319

Friday 26

Waxing Crescent 52%

11:52

23:47

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

Sun - Rise: 07:55, Set: 16:43, Transit: 12:19. Moon - Rise: 11:52, Set: 23:47. Civil Dark: 17:17 - 07:21. Nautical Dark: 17:54 - 06:44. Astro Dark: 18:30 - 06:09

Total Clouds (% Sky Obscured)

100
100
81
89
87
92
83
77
58
42
25
4
8
25
25
25
25
40
54
59
67
68
68
67

Low Clouds (% Sky Obscured)

98
97
65
78
77
83
76
70
58
41
20
1
0
0
1
12
18
20
27
37
48
46
48
47

Medium Clouds (% Sky Obscured)

100
95
61
55
51
54
45
32
19
13
6
0
0
0
0
2
25
35
35
30
29
21
22
2

High Clouds (% Sky Obscured)

75
30
0
0
0
0
0
0
0
0
2
2
6
25
25
25
25
30
16
20
18
25
5
5

ISS Passover

Visibility (miles)

1
1
6
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
8
5

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
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

79
59
44
39
37
35
32
26
18
13
8
0
0
0
0
0
0
0
0
0
0
1
0
0

Precipitation Amount (mm)

0.4
0.2
0.1
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
10
10
8
8
7
7
6
7
6
6
6
5
5
5
6
6
6
7
7
6
7
6
5

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

85
85
85
81
81
81
81
83
81
83
85
85
86
88
88
86
85
85
84
84
87
87
90
90

Pressure (mb)

1013
1013
1013
1013
1014
1014
1015
1016
1016
1017
1018
1019
1020
1020
1021
1022
1022
1022
1021
1021
1021
1021
1021
1021

Ozone (du)

320
325
333
337
336
329
330
332
334
335
340
348
353
353
351
349
344
338
332
327
328
332
333
333

Saturday 27

First Quarter 63%

12:12

01:00

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
17 Bad
18 Bad

Sun - Rise: 07:55, Set: 16:44, Transit: 12:20. Moon - Rise: 12:12, Set: 01:00. Civil Dark: 17:18 - 07:22. Nautical Dark: 17:55 - 06:44. Astro Dark: 18:30 - 06:09

Total Clouds (% Sky Obscured)

69
74
80
87
93
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

54
63
73
83
91
100
100
100
100
98
96
94
89
84
81
84
87
89
94
97
100
100
100
100

Medium Clouds (% Sky Obscured)

2
4
40
28
31
43
55
70
81
87
94
100
96
93
91
88
86
85
88
90
92
95
98
100

High Clouds (% Sky Obscured)

0
0
0
4
9
7
41
74
81
100
100
100
96
93
91
98
98
99
98
98
98
100
100
100

ISS Passover

Visibility (miles)

4
2
3
3
3
4
2
2
2
3
2
5
8
7
5
3
2
1
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
Snow
Snow
Snow
Snow
Frozen rai
Frozen rai
Frozen rai
Frozen rai
Frozen rai

Precipitation Probability (%)

1
2
5
12
5
0
2
1
3
16
13
17
35
35
33
51
59
60
65
66
63
77
85
93

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

92
90
92
92
92
92
92
90
92
94
94
94
94
94
96
96
96
98
98
98
98
98
98
94

Pressure (mb)

1022
1022
1021
1021
1021
1020
1019
1019
1019
1018
1017
1016
1015
1014
1013
1012
1011
1009
1007
1006
1005
1004
1003
1003

Ozone (du)

332
333
333
335
334
335
335
336
337
336
339
342
343
347
351
355
357
359
361
365
368
372
377
382

Sunday 28

Waxing Gibbous 63%

12:35

02:17

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
17 Bad
18 Bad

Sun - Rise: 07:55, Set: 16:45, Transit: 12:20. Moon - Rise: 12:35, Set: 02:17. Civil Dark: 17:18 - 07:22. Nautical Dark: 17:56 - 06:45. Astro Dark: 18:31 - 06:09

Total Clouds (% Sky Obscured)

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

Low Clouds (% Sky Obscured)

100
100
100
99
99
98
98
98
97
98
99
100
98
96
94
92
90
89
90
90
90
89
88
87

Medium Clouds (% Sky Obscured)

94
87
77
56
41
30
30
33
41
54
70
79
86
93
100
97
96
93
89
84
81
88
94
100

High Clouds (% Sky Obscured)

79
58
37
25
12
0
0
0
0
0
0
0
0
0
0
5
16
67
30
27
19
31
39
55

ISS Passover

Visibility (miles)

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

Frozen rai
Frozen rai
Snow
Snow
Snow
Light Rain
Light Rain
Very Light Rain
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
None

Precipitation Probability (%)

82
79
84
95
95
95
84
71
67
72
76
79
78
80
86
75
64
53
55
56
56
57
54
48

Precipitation Amount (mm)

0.5
0.4
0.5
0.7
0.9
0.8
0.5
0.3
0.4
0.4
0.5
0.5
0.5
0.5
0.6
0.4
0.3
0.2
0.2
0.2
0.2
0.2
0.2
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-4
-5
-5
-6
-6
-5
-5
-9
-10
-11
-11
-11
-12
-14
-13
-13
-14
-15
-15
-18
-18
-18
-18
-18

Dew Point (°C)

-2
-3
-3
-4
-4
-5
-5
-6
-7
-8
-9
-9
-10
-10
-10
-10
-12
-13
-14
-14
-14
-14
-14
-15

Relative Humidity (%)

94
92
91
89
86
82
81
79
78
77
77
80
82
83
82
83
81
80
78
80
81
81
83
81

Pressure (mb)

1002
1001
1000
999
999
998
998
998
998
998
998
998
997
997
997
998
998
999
999
1000
1000
1001
1002
1002

Ozone (du)

386
397
407
418
424
430
436
438
439
441
432
422
413
413
413
413
413
413
413
413
413
413
412
411

Monday 29

Waxing Gibbous 74%

13:05

03:39

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: 07:55, Set: 16:46, Transit: 12:21. Moon - Rise: 13:05, Set: 03:39. Civil Dark: 17:19 - 07:22. Nautical Dark: 17:56 - 06:45. Astro Dark: 18:32 - 06:09

Total Clouds (% Sky Obscured)

100
99
99
99
99
100
100
99
99
100
100
100
99
99
96
94
94
95

Low Clouds (% Sky Obscured)

88
89
89
90
91
92
90
89
89
89
88
88
84
82
79
79
80
80

Medium Clouds (% Sky Obscured)

97
94
91
95
98
100
98
95
93
88
83
77
49
25
2
1
0
0

High Clouds (% Sky Obscured)

58
67
58
67
71
65
47
28
17
8
2
0
0
0
0
0
0
0

ISS Passover

Visibility (miles)

1
1
1
0
3
5
7
5
4
3
3
4
4
4
4
4
5
7

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

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

Precipitation Probability (%)

50
50
44
45
44
39
41
41
37
39
41
37
37
34
21
19
16
7

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

16
15
15
14
15
15
15
15
15
15
14
14
14
14
14
14
14
13

Chance of Frost

Temperature (°C)

-13
-13
-13
-13
-13
-13
-13
-13
-13
-13
-13
-14
-14
-14
-14
-14
-13
-12

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

81
81
83
83
83
79
79
81
79
81
81
81
81
81
81
81
81
81

Pressure (mb)

1003
1004
1004
1005
1005
1006
1006
1007
1008
1009
1009
1010
1011
1012
1013
1014
1014
1014

Ozone (du)

411
410
409
408
412
416
420
419
418
417
417
418
418
418
418
418
416
414

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

Generated: 23/12/25 19:13:17. Forecast: 23/12/25 to 29/12/25. Timezone: UTC-5.00