Clear Outside v1.0 - International Weather Forecasts For Astronomers

Saturday 20

Waxing Crescent 1%

08:49

16:51

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
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad

Sun - Rise: 07:53, Set: 16:39, Transit: 12:16. Moon - Rise: 08:49, Set: 16:51. Civil Dark: 17:13 - 07:19. Nautical Dark: 17:50 - 06:42. Astro Dark: 18:26 - 06:06

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
92
100
100
100
100
99
100
65
87
99
95
71

Low Clouds (% Sky Obscured)

30
49
57
62
37
38
55
0
100
94
92
82
88
100
100
100
100
96
100
26
54
95
81
43

Medium Clouds (% Sky Obscured)

100
90
100
100
100
100
100
100
100
100
100
58
0
0
0
24
10
22
12
6
30
39
45
5

High Clouds (% Sky Obscured)

100
76
99
100
100
94
63
71
81
100
11
11
0
0
0
0
0
0
0
0
0
0
0
0

ISS Passover

Visibility (miles)

9
9
1
1
0
1
9
7
4
0
2
4
9
8
8
3
4
0
8
0
0
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

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

Precipitation Probability (%)

0
2
72
73
81
28
28
43
78
95
59
27
21
20
32
47
64
64
48
53
42
52
58
57

Precipitation Amount (mm)

0
0
0.4
0.5
0.6
0
0
0.2
0.4
1.3
0.2
0
0
0
0
0.1
0.4
0.4
0.2
0.4
0.2
0.3
0.5
0.4

Wind Speed/Direction (mph)

7
8
9
13
15
15
15
15
14
13
12
12
12
13
15
17
18
18
19
14
14
12
11
11

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

88
88
89
90
89
89
79
79
83
87
92
84
77
80
80
73
70
92
72
87
85
76
77
79

Pressure (mb)

1017
1017
1015
1014
1011
1009
1007
1006
1005
1005
1004
1004
1004
1003
1003
1004
1004
1006
1008
1010
1011
1012
1013
1014

Ozone (du)

336
334
330
328
323
325
327
326
320
323
326
330
333
333
333
335
340
348
345
343
341
338
340
342

Sunday 21

Waxing Crescent 3%

09:32

17:54

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

Sun - Rise: 07:53, Set: 16:39, Transit: 12:16. Moon - Rise: 09:32, 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)

89
95
88
82
55
74
71
41
11
3
4
9
35
46
29
46
58
98
97
95
89
88
86
96

Low Clouds (% Sky Obscured)

70
86
81
70
36
69
65
34
10
1
1
2
35
46
29
46
58
95
89
74
58
60
60
60

Medium Clouds (% Sky Obscured)

15
15
0
0
1
0
0
0
0
0
0
0
0
2
16
6
15
21
23
31
30
25
30
53

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)

4
1
0
3
5
7
9
9
9
9
9
9
9
9
9
9
5
0
0
0
0
0
2
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
Snow
None
None
None
None
None
None
None
None
None
None
None
None
None
None
Snow
Snow
Snow
Snow
Snow
None
None

Precipitation Probability (%)

54
45
42
19
26
11
9
2
1
1
1
0
0
0
0
1
20
40
43
41
45
41
12
10

Precipitation Amount (mm)

0.2
0
0.1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.2
0.2
0.2
0.2
0.2
0
0

Wind Speed/Direction (mph)

11
11
12
13
12
12
12
10
9
7
6
5
4
3
2
2
3
4
5
4
4
6
8
8

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-8
-8
-7
-9
-10
-10
-12
-12
-13
-13
-13
-14
-14
-14
-14
-14
-14
-13
-11
-9
-8
-7
-8
-9

Relative Humidity (%)

79
82
87
80
80
80
77
77
77
80
83
81
83
84
83
83
83
86
88
92
92
94
87
82

Pressure (mb)

1015
1017
1018
1020
1021
1022
1023
1025
1027
1028
1029
1030
1031
1031
1031
1031
1031
1030
1030
1030
1029
1028
1028
1028

Ozone (du)

346
350
353
355
365
367
359
355
356
353
352
348
346
357
372
376
368
371
371
365
361
355
350
352

Monday 22

Waxing Crescent 7%

10:06

19:03

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
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad

Sun - Rise: 07:54, Set: 16:40, Transit: 12:17. Moon - Rise: 10:06, 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)

96
88
78
83
96
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
99
98
98
97

Low Clouds (% Sky Obscured)

50
30
30
32
30
29
57
67
87
100
82
96
100
96
79
76
92
94
96
99
97
95
93
93

Medium Clouds (% Sky Obscured)

35
75
68
78
95
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
98
96
94
92

High Clouds (% Sky Obscured)

13
70
65
65
60
54
45
40
100
100
46
100
100
100
100
100
100
80
60
55
50
26
0
0

ISS Passover

Visibility (miles)

9
7
8
7
3
4
9
4
0
0
0
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

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

Precipitation Probability (%)

7
7
18
6
16
4
18
22
41
58
64
59
59
70
75
80
95
95
95
95
95
95
94
79

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0.2
0.3
0.4
0.3
0.2
0.3
0.4
0.4
0.8
0.8
0.9
0.9
1
1
0.6
0.5

Wind Speed/Direction (mph)

7
7
7
7
9
9
9
8
7
6
5
5
4
4
4
5
5
5
6
6
6
6
6
6

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-10
-10
-9
-6
-5
-3
-3
-4
-3
-4
-3
-3
-3
-3
-3
-3
-4
-4
-4
-4
-4
-4
-4
-4

Dew Point (°C)

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

Relative Humidity (%)

82
85
84
84
87
89
86
86
94
98
98
98
96
98
98
98
98
98
98
98
98
96
98
98

Pressure (mb)

1028
1028
1028
1027
1026
1025
1025
1025
1024
1024
1024
1024
1023
1022
1022
1021
1020
1019
1018
1017
1016
1015
1015
1015

Ozone (du)

357
363
361
359
354
354
347
340
334
329
323
322
319
318
318
316
314
310
308
306
306
304
309
308

Tuesday 23

Waxing Crescent 13%

10:33

20:14

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
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad

Sun - Rise: 07:54, Set: 16:41, Transit: 12:17. Moon - Rise: 10:33, 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)

96
95
94
94
94
96
98
100
100
100
100
100
100
100
99
100
100
96
92
89
89
89
86
81

Low Clouds (% Sky Obscured)

92
91
91
91
91
93
96
100
100
100
100
100
100
100
99
100
100
93
88
84
82
83
81
73

Medium Clouds (% Sky Obscured)

89
87
82
68
33
33
37
36
25
14
5
4
1
0
2
0
0
0
0
0
0
0
0
6

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)

0
0
0
0
1
0
0
0
0
7
3
2
1
0
0
1
3
7
8
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
Snow
Snow
Snow
Snow
Snow
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

77
80
71
45
47
46
35
29
26
20
19
18
24
25
21
21
20
15
10
2
2
3
1
0

Precipitation Amount (mm)

0.4
0.5
0.4
0.1
0.2
0.1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-4
-4
-3
-3
-2
-2
-3
-3
-3
-3
-4
-4
-4
-4
-4
-3
-3
-3
-3
-4
-4
-6
-7
-7

Dew Point (°C)

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

Relative Humidity (%)

98
98
98
100
100
100
100
100
98
98
96
94
96
96
98
96
96
96
96
98
98
94
94
96

Pressure (mb)

1014
1014
1014
1014
1013
1013
1013
1014
1015
1016
1016
1017
1018
1019
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028

Ozone (du)

307
307
307
313
315
317
318
323
325
323
326
325
324
323
324
325
323
321
321
322
321
316
314
313

Wednesday 24

Waxing Crescent 21%

10:56

21:24

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
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad

Sun - Rise: 07:54, Set: 16:41, Transit: 12:18. Moon - Rise: 10:56, 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)

85
85
84
83
82
87
93
99
99
99
99
99
100
100
99
99
98
99
99
100
100
100
100
100

Low Clouds (% Sky Obscured)

60
69
67
42
44
48
43
40
35
28
40
51
61
74
79
83
86
93
97
100
100
99
99
99

Medium Clouds (% Sky Obscured)

10
14
18
23
62
75
88
99
97
94
94
93
92
92
92
90
90
89
89
89
73
60
48
55

High Clouds (% Sky Obscured)

0
5
9
14
14
37
61
80
84
87
91
95
97
100
90
79
69
48
26
5
33
67
100
100

ISS Passover

Visibility (miles)

9
4
7
9
9
9
9
9
9
9
7
9
9
9
9
9
9
9
7
5
3
2
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
None
None
None
None
None
Snow
Frozen rai
Frozen rai
Frozen rai
None
None
None

Precipitation Probability (%)

0
0
0
1
1
0
0
0
0
1
14
13
9
2
16
24
28
43
59
69
60
47
27
23

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.1
0.3
0.3
0.3
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-8
-9
-8
-7
-7
-6
-6
-6
-6
-6
-7
-6
-6
-7
-7
-7
-6
-6
-6
-5
-5
-5
-4
-5

Dew Point (°C)

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

Relative Humidity (%)

94
96
94
94
98
98
98
96
94
96
98
96
96
94
92
92
96
96
96
98
98
98
100
100

Pressure (mb)

1029
1030
1030
1030
1029
1029
1028
1028
1028
1027
1027
1026
1025
1024
1023
1022
1021
1020
1019
1018
1017
1017
1016
1015

Ozone (du)

310
310
311
314
311
309
308
309
308
308
308
306
307
308
309
309
309
309
309
310
310
310
309
309

Thursday 25

Waxing Crescent 30%

11:15

22:35

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
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad

Sun - Rise: 07:55, Set: 16:42, Transit: 12:18. Moon - Rise: 11:15, Set: 22:35. Civil Dark: 17:16 - 07:21. Nautical Dark: 17:53 - 06:44. Astro Dark: 18:28 - 06:08

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
100
100
96
92
87
87
88
89
94
95
96
97

Low Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
100
100
96
92
87
87
88
89
92
92
93
93

Medium Clouds (% Sky Obscured)

61
65
50
45
45
40
40
45
57
75
92
69
42
15
15
10
10
9
11
8
8
11
14
20

High Clouds (% Sky Obscured)

96
97
96
96
86
82
81
89
92
96
100
83
77
80
85
75
30
65
55
55
56
52
57
65

ISS Passover

Visibility (miles)

0
0
0
0
0
0
0
0
0
0
0
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

None
None
None
None
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
Very Light Rain

Precipitation Probability (%)

18
4
6
8
7
12
13
12
14
16
12
22
26
28
25
24
20
46
51
48
58
59
58
55

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
0.3

Wind Speed/Direction (mph)

5
5
4
4
3
3
4
5
5
6
7
8
8
10
13
12
12
11
11
11
11
10
9
10

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

100
100
100
100
100
100
100
100
98
100
100
100
98
100
100
100
100
100
100
100
100
100
100
100

Pressure (mb)

1015
1015
1015
1013
1012
1011
1010
1009
1009
1008
1007
1006
1006
1006
1005
1005
1005
1004
1004
1003
1003
1003
1002
1002

Ozone (du)

308
306
304
303
302
300
297
295
292
289
286
283
282
280
278
278
277
277
275
273
270
272
274
275

Friday 26

Waxing Crescent 41%

11:34

23:47

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
00 OK

Sun - Rise: 07:55, Set: 16:43, Transit: 12:19. Moon - Rise: 11:34, Set: 23:47. Civil Dark: 17:16 - 07:21. Nautical Dark: 17:53 - 06:44. Astro Dark: 18:29 - 06:09

Total Clouds (% Sky Obscured)

97
96
97
99
100
100
99
99
89
78
67
58
49
44
39
32
24

Low Clouds (% Sky Obscured)

92
91
91
92
92
87
82
78
69
60
51
50
44
36
38
32
24

Medium Clouds (% Sky Obscured)

27
36
45
50
50
49
47
45
45
45
40
15
15
20
25
29
24

High Clouds (% Sky Obscured)

81
78
69
60
60
55
56
50
65
78
67
58
49
44
39
32
1

ISS Passover

Visibility (miles)

0
0
0
3
6
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

Precipitation Type

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

Precipitation Probability (%)

44
28
26
17
9
12
12
12
15
18
19
27
30
31
29
29
31

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

10
12
14
16
17
18
15
12
10
9
9
10
9
9
9
8
7

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

1
1
1
2
1
2
-4
-4
-5
-5
-6
-7
-12
-11
-12
-12
-12

Dew Point (°C)

4
3
3
3
2
1
-1
-3
-6
-7
-8
-10
-10
-11
-13
-13
-13

Relative Humidity (%)

100
98
98
96
93
91
86
83
79
79
76
74
73
71
68
70
68

Pressure (mb)

1003
1003
1004
1004
1005
1006
1007
1009
1011
1012
1013
1014
1015
1015
1016
1016
1016

Ozone (du)

279
283
287
294
300
306
313
319
326
332
338
344
351
358
365
366
367

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

Generated: 20/12/25 08:20:44. Forecast: 20/12/25 to 26/12/25. Timezone: UTC-5.00