Clear Outside v1.0 - International Weather Forecasts For Astronomers

Sunday 21

Waxing Crescent 3%

09:08

17:29

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

Sun - Rise: 07:30, Set: 16:15, Transit: 11:52. Moon - Rise: 09:08, Set: 17:29. Civil Dark: 16:49 - 06:56. Nautical Dark: 17:26 - 06:19. Astro Dark: 18:02 - 05:43

Total Clouds (% Sky Obscured)

89
80
97
84
35
35
31
31
34
44
44
39
81
84
96
97
89
80
78
84
83
79
78
81

Low Clouds (% Sky Obscured)

72
80
97
81
35
35
31
31
34
44
44
39
78
82
93
95
87
78
75
79
76
72
72
70

Medium Clouds (% Sky Obscured)

50
66
29
0
0
0
0
0
0
0
0
19
0
0
0
0
0
0
0
0
0
0
0
7

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)

9
9
2
7
9
9
9
9
9
9
9
9
9
9
6
8
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
19
6
1
2
1
3
3
5
2
6
7
19
6
5
6
3
2
2
1
1
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)

7
8
12
16
17
17
17
17
17
17
15
15
15
15
15
15
15
15
15
14
13
13
13
12

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-5
-4
-6
-7
-10
-9
-9
-9
-9
-9
-9
-9
-10
-12
-13
-13
-14
-15
-15
-15
-16
-16
-16
-16

Dew Point (°C)

-4
-5
-1
-5
-10
-11
-12
-11
-11
-10
-9
-10
-10
-11
-11
-12
-13
-14
-14
-14
-15
-14
-15
-14

Relative Humidity (%)

67
63
89
68
55
52
48
50
52
55
59
59
62
63
66
63
63
62
63
63
63
64
64
65

Pressure (mb)

1005
1004
1005
1007
1009
1011
1012
1013
1013
1014
1015
1016
1018
1019
1021
1022
1023
1024
1025
1026
1026
1027
1028
1029

Ozone (du)

323
330
334
333
329
327
330
329
328
330
330
338
343
341
338
341
341
345
343
345
342
342
347
358

Monday 22

Waxing Crescent 7%

09:42

18:38

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

Sun - Rise: 07:30, Set: 16:16, Transit: 11:53. Moon - Rise: 09:42, Set: 18:38. Civil Dark: 16:50 - 06:56. Nautical Dark: 17:27 - 06:19. Astro Dark: 18:03 - 05:43

Total Clouds (% Sky Obscured)

87
86
76
48
38
54
56
39
50
41
41
100
99
97
96
97
99
100
97
100
98
99
96
99

Low Clouds (% Sky Obscured)

68
67
68
48
38
31
20
39
50
41
41
58
92
85
85
86
84
84
86
84
85
79
92
99

Medium Clouds (% Sky Obscured)

17
12
0
33
38
47
40
39
50
41
41
98
93
85
88
90
94
94
25
25
16
17
45
34

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2
45
6
14
12
41
20
15

ISS Passover

Visibility (miles)

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

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

Precipitation Probability (%)

1
7
2
1
0
0
0
4
20
43
47
49
50
45
36
43
44
45
41
34
24
18
16
25

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-15
-15
-15
-15
-14
-14
-13
-12
-11
-11
-10
-9
-10
-9
-8
-8
-9
-9
-9
-8
-7
-7
-8
-7

Dew Point (°C)

-15
-15
-14
-15
-15
-15
-15
-15
-15
-15
-15
-14
-13
-13
-11
-9
-7
-6
-6
-6
-6
-6
-6
-5

Relative Humidity (%)

65
65
66
62
62
59
55
52
49
49
50
51
56
57
66
76
90
90
92
92
90
90
92
92

Pressure (mb)

1029
1030
1031
1031
1031
1031
1031
1031
1030
1029
1029
1028
1028
1028
1027
1027
1026
1026
1025
1025
1024
1024
1024
1024

Ozone (du)

361
367
365
371
368
365
378
377
368
362
358
356
353
359
362
356
354
351
349
347
346
346
343
343

Tuesday 23

Waxing Crescent 13%

10:09

19:48

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
00 Bad
01 Bad
02 Bad
03 Bad

Sun - Rise: 07:30, Set: 16:16, Transit: 11:53. Moon - Rise: 10:09, Set: 19:48. Civil Dark: 16:50 - 06:57. Nautical Dark: 17:28 - 06:19. Astro Dark: 18:03 - 05:44

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
96
100
100
100
100
100
99
100
100
100
100
100
100
100
100
99
97
96

Low Clouds (% Sky Obscured)

100
95
100
100
97
94
94
81
80
78
73
69
50
57
58
64
89
90
92
91
98
94
91
89

Medium Clouds (% Sky Obscured)

16
40
40
47
62
48
49
71
100
100
100
100
98
100
100
99
100
100
100
100
100
94
88
80

High Clouds (% Sky Obscured)

0
62
97
100
100
100
54
50
45
45
32
30
0
0
0
0
0
0
0
0
0
0
0
0

ISS Passover

Visibility (miles)

0
0
0
0
2
7
9
7
9
9
9
9
9
9
9
9
9
9
5
0
0
0
0
0

Fog (%)

0
1
2
1
1
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
Snow
Snow
Snow
Snow
Snow
Snow

Precipitation Probability (%)

24
20
24
16
6
4
3
6
4
4
2
1
3
0
0
3
19
42
71
84
85
88
93
92

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.1
0.4
0.5
0.4
0.6
0.6
0.6

Wind Speed/Direction (mph)

2
3
3
3
4
5
5
5
5
5
5
5
5
4
4
5
4
3
2
3
4
5
5
4

Chance of Frost

Temperature (°C)

-4
-5
-5
-5
-5
-5
-5
-4
-4
-4
-4
-4
-4
-4
-4
-5
-5
-5
-5
-4
-4
-3
-3
-3

Feels Like (°C)

-7
-7
-7
-8
-8
-8
-8
-7
-8
-8
-7
-8
-8
-8
-8
-8
-8
-8
-8
-7
-8
-8
-7
-7

Dew Point (°C)

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

Relative Humidity (%)

94
96
98
94
94
92
87
82
81
79
79
79
82
85
85
85
85
87
87
96
96
96
96
96

Pressure (mb)

1024
1024
1024
1024
1024
1024
1024
1023
1022
1021
1021
1021
1020
1020
1020
1020
1019
1018
1017
1017
1016
1016
1016
1016

Ozone (du)

340
339
336
334
331
328
327
323
325
331
337
343
342
346
346
347
349
349
347
347
346
347
348
351

Wednesday 24

Waxing Crescent 21%

10:32

20:59

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

Sun - Rise: 07:31, Set: 16:17, Transit: 11:54. Moon - Rise: 10:32, Set: 20:59. Civil Dark: 16:51 - 06:57. Nautical Dark: 17:28 - 06:20. Astro Dark: 18:04 - 05:44

Total Clouds (% Sky Obscured)

95
95
96
95
91
94
96
81
50
46
54
47
45
74
34
32
97
100
100
100
100
100
96
100

Low Clouds (% Sky Obscured)

88
87
85
85
85
90
93
75
42
36
42
25
17
8
7
6
6
7
43
54
97
83
32
70

Medium Clouds (% Sky Obscured)

63
54
49
43
33
22
16
12
7
21
29
42
45
69
34
32
72
63
75
100
100
89
56
100

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
11
22
33
34
34
33
32
80
100
100
100
100
90
79
68

ISS Passover

Visibility (miles)

0
0
4
2
8
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
Snow
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

79
56
40
25
20
10
11
6
5
7
5
1
2
2
0
0
0
0
14
21
26
24
21
11

Precipitation Amount (mm)

0.4
0.1
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
6
7
8
9
11
11
11
11
10
9
8
6
5
4
3
1
1
2
3
5
5
4

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

98
96
91
92
91
87
84
79
77
75
76
76
79
81
81
82
85
87
87
87
87
85
86
84

Pressure (mb)

1016
1017
1018
1020
1021
1022
1023
1023
1023
1024
1024
1025
1025
1025
1026
1026
1025
1024
1024
1023
1022
1021
1020
1019

Ozone (du)

351
349
344
339
337
336
336
339
335
336
332
329
330
329
327
326
325
327
327
329
327
327
327
328

Thursday 25

Waxing Crescent 30%

10:52

22:10

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
00 Bad
01 Bad
02 Bad
03 Bad

Sun - Rise: 07:31, Set: 16:18, Transit: 11:54. Moon - Rise: 10:52, Set: 22:10. Civil Dark: 16:51 - 06:57. Nautical Dark: 17:29 - 06:20. Astro Dark: 18:05 - 05:44

Total Clouds (% Sky Obscured)

100
88
100
100
80
99
100
71
88
98
95
93
95
98
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

74
38
72
83
80
99
98
71
88
86
70
68
65
62
62
63
64
67
73
68
65
59
52
39

Medium Clouds (% Sky Obscured)

100
54
65
46
14
0
0
0
0
0
0
0
0
50
44
57
67
72
77
81
88
88
89
90

High Clouds (% Sky Obscured)

45
23
5
37
62
98
76
28
5
46
62
76
84
93
99
82
61
41
41
41
40
60
80
100

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
8
8

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 (%)

10
10
9
10
9
8
7
5
2
5
5
3
2
2
0
0
0
0
4
12
18
28
39
37

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

84
87
92
94
92
86
76
78
81
80
81
87
92
96
96
96
94
96
94
94
92
94
94
96

Pressure (mb)

1018
1018
1017
1017
1018
1018
1018
1017
1017
1017
1017
1018
1018
1018
1018
1018
1018
1017
1017
1016
1015
1014
1013
1011

Ozone (du)

324
322
321
322
321
321
320
319
317
315
314
313
314
314
312
310
308
305
303
300
298
296
296
295

Friday 26

Waxing Crescent 41%

11:10

23:22

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 OK
23 OK
00 OK
01 Good
02 Good
03 Good

Sun - Rise: 07:31, Set: 16:18, Transit: 11:55. Moon - Rise: 11:10, Set: 23:22. Civil Dark: 16:52 - 06:58. Nautical Dark: 17:29 - 06:20. Astro Dark: 18:05 - 05:45

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
98
96
93
76
60
43
30
26
11
4
2
2

Low Clouds (% Sky Obscured)

41
32
34
56
78
100
100
100
100
100
100
100
96
92
88
75
60
43
30
26
11
4
2
2

Medium Clouds (% Sky Obscured)

95
97
100
100
100
100
88
72
57
42
33
33
34
34
40
30
15
8
4
2
0
0
0
0

High Clouds (% Sky Obscured)

99
100
100
100
100
100
78
56
43
38
60
65
70
95
93
63
32
0
0
0
0
0
0
0

ISS Passover

Visibility (miles)

7
5
3
1
1
1
0
0
0
0
2
3
5
6
8
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
Sleet
Very Light Rain
Light Rain
Light Rain
Frozen rai
Frozen rai
Frozen rai
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
None
None
None
None
None
None
None

Precipitation Probability (%)

43
58
64
95
95
95
95
95
95
95
95
95
95
95
87
73
50
24
17
11
11
11
8
4

Precipitation Amount (mm)

0.1
0.3
0.2
0.7
1.3
1.6
1.6
1.4
1.2
1.4
1.5
1.6
1.3
0.8
0.5
0.4
0.2
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

-5
-5
-4
-3
-2
-3
-3
-3
-3
-3
-3
-4
-4
-6
-8
-9
-10
-11
-12
-13
-14
-14
-15
-15

Feels Like (°C)

-9
-9
-8
-7
-6
-5
-4
-4
-5
-4
-8
-8
-9
-8
-8
-8
-17
-16
-17
-17
-17
-18
-20
-19

Dew Point (°C)

-6
-5
-4
-4
-3
-3
-3
-4
-4
-4
-5
-6
-7
-9
-12
-14
-15
-16
-17
-18
-18
-19
-19
-19

Relative Humidity (%)

96
98
98
98
98
98
96
96
94
94
89
85
81
77
72
69
68
67
66
66
67
68
69
70

Pressure (mb)

1010
1009
1008
1006
1005
1004
1003
1003
1002
1002
1003
1004
1006
1008
1011
1013
1015
1017
1019
1020
1021
1022
1024
1025

Ozone (du)

295
296
298
299
302
305
308
312
316
319
323
328
332
343
354
365
372
380
387
389
391
393
393
393

Saturday 27

First Quarter 52%

11:28

00:35

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

Sun - Rise: 07:32, Set: 16:19, Transit: 11:55. Moon - Rise: 11:28, Set: 00:35. Civil Dark: 16:53 - 06:58. Nautical Dark: 17:30 - 06:21. Astro Dark: 18:06 - 05:45

Total Clouds (% Sky Obscured)

3
4
5
4
28
48
10
2
3
5
7
18
61
82
93
95
98
100
100
100
100

Low Clouds (% Sky Obscured)

3
4
5
4
12
0
1
1
1
5
7
18
24
22
21
33
47
61
72
82
95

Medium Clouds (% Sky Obscured)

0
0
0
2
4
8
10
2
3
1
1
2
27
55
74
75
75
72
75
80
94

High Clouds (% Sky Obscured)

3
4
5
4
28
25
10
2
3
5
7
18
39
29
39
60
76
95
95
95
95

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
7
5

Fog (%)

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

Precipitation Probability (%)

5
4
0
1
1
0
0
0
0
0
0
0
2
5
5
8
8
2
8
12
15

Precipitation Amount (mm)

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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-19
-19
-20
-20
-20
-19
-18
-18
-18
-18
-13
-13
-13
-13
-13
-13
-15
-15
-15
-15
-15

Dew Point (°C)

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

Relative Humidity (%)

71
71
70
70
66
63
60
58
56
53
59
65
70
73
73
76
75
73
74
72
72

Pressure (mb)

1026
1026
1027
1028
1029
1029
1030
1029
1029
1028
1028
1028
1027
1027
1027
1026
1026
1025
1024
1023
1022

Ozone (du)

393
390
386
382
379
375
372
372
373
373
372
370
369
366
363
360
359
358
357
358
359

Forecast for Hemmingford, Montérégie, Canada (45.05,-73.58)

Generated: 21/12/25 04:25:04. Forecast: 21/12/25 to 27/12/25. Timezone: UTC-5.00